CN106076114B

CN106076114B - A flue gas treatment system and method

Info

Publication number: CN106076114B
Application number: CN201610659573.4A
Authority: CN
Inventors: 王涛
Original assignee: Individual
Current assignee: Beijing Kaiyuan Environmental Protection Technology Co ltd
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2019-06-14
Anticipated expiration: 2036-08-12
Also published as: CN106076114A

Abstract

The invention discloses a kind of smoke processing system and method, the smoke processing system includes the cold and hot crosspoint cooling for flue gas, gas cleaning unit, the emersion object processing unit for being handled the gas cleaning unit emersion object and for the chemical dosing unit to the gas cleaning unit dosing；Flue gas is after the cold and hot crosspoint is cooling, into gas cleaning purification unit, purified cleaned air is discharged from the gas outlet of the gas cleaning unit, the emersion object generated in purification process drains into the emersion object processing unit and is handled, the lime-ash obtained after processing can be used to be processed into construction material, and obtained crystal can be used to be processed into ecological brick after handling, and for Desert Control, salt-soda soil, improve contaminated soil and build stereo ecological farming and animal husbandry.

Description

A kind of smoke processing system and method

Technical field

The present invention relates to environment protection fields, more particularly to a kind of smoke processing system and method.

Background technique

Industrial civilization and urban development, for the mankind create great wealth while, also billions of tons count exhaust gas and Waste is discharged among atmosphere, and atmospheric thermodynamics for the survival of mankind is but at aerial garbage warehouse and poison gas library.Harmful gas in atmosphere When body and pollutant reach a certain concentration, will the mankind and environment be brought with huge disaster, air pollution has become whole world city A unavoidable reality in city's resident living.And coal-fired, industrial waste gas caused by fuel oil equipment is the weight of air pollution Want source.

By the end of the year 2006, the unit capacity of single China's coal fired power plant installation desulphurization plant is such as all thrown up to 1.5 hundred million kilowatts Enter operation, will be more than every year 20000000 tons by the quantity of the desulfuration waste of generation；Currently, when 3.6 hundred million kilowatts of coal fired power plant When all installing desulphurization plant and putting into operation, the quantity of annual desulfuration waste will be up to 60,000,000 tons or more；All installations Denitration device and when putting into operation, the quantity of annual denitrfying agent waste also will be up to 30,000,000 tons or more；All installation dedirt is set Standby and when putting into operation, the quantity of annual dedirt waste will be up to 400,000,000 tons or more.

It can be seen that being the weight for administering air pollution for the purification of industrial waste gas caused by the equipment such as fire coal, fuel oil In it is weight.

Currently, coal-fired, fuel oil equipment discharge flue gas purification is all paid much attention in countries in the world, tens of kinds of rows have been developed Effective flue gases purification, wherein the flue gases purification being widely used has: respectively facture, half comprehensive treatment method.

Difference facture: refer to the pernicious gas, dust etc. by different device and method to heterogeneity in exhaust gas It handles respectively, specific as follows:

1, dedusting: dedusting is had by efficiency point: ceramic element dedusting, high-pressure electrostatic bag-type dust, water film dedusting, still Low efficiency is recycled, cleaner is at high cost, and practical efficiency of dust collection is no more than 90%.

2, desulfurization: there are dry desulfurization (recycling elemental sulfur), wet desulphurization (sulfate is recycled in buck method desulfurization), but return Yield is low, and desulphurization plant, additive are at high cost, and practical sulphur removal efficiency is no more than 80%.

3, denitration: SNCR method, SCR method, be using ammonia+catalyst, under the conditions of high medium temperature, catalytic reduction method denitration at Nitrogen and steam are discharged into atmosphere, and only investment forms bottomless pit formula investment without recycling, and practical denitration efficiency is no more than 70%.

4、CO₂Removing: existing exhaust gas purification equipment is free of CO₂Removing means.

Half comprehensive treatment method: refer to and desulfurization and dedusting is integrated (dust removal with desulfurization by water film method) or denitration dedirt is combined into one Body.Denitration cannot be integrated with desulfurization, be because the catalyst in denitration is easily failed by sulfur poisoning.This half integrated treatment Method can reduce sub-fraction investment, but gas cleaning improve be not obvious, and half synthesis recycling it is inconvenient and not cost-effective. And if the direct outlet of exhaust gas after doup legal processes, manure contamination fast speed, caused by secondary pollution according to It is old very serious.

Summary of the invention

In view of this, using selection the main purpose of the present invention is to provide a kind of smoke processing system and its method Property catalysis neutralisation, flue gas ash removal, desulphurization and denitration, demisting intersect progress, alternatively referred to as low-temperature treatment method in same container, The manufacturing cost of integral device is low, and gas cleaning effect is more thorough, and can be recycled to emersion object, creates economic effect Benefit.

To achieve the goals above, technical scheme is as follows:

A kind of smoke processing system comprising the cold and hot crosspoint cooling for flue gas, gas cleaning unit, for pair The emersion object processing unit and be used for the gas cleaning unit dosing that the gas cleaning unit emersion object is handled Chemical dosing unit；

The gas cleaning unit is in tower-shaped comprising reactor shell, inside the reactor shell from bottom to top according to It is secondary to be equipped with mixing liquid chamber, gas chamber, filtration treatment unit, demister, gas outlet is equipped at the top of the reactor shell, in the reaction Device housing sidewall be equipped with the exhaust gas entrance of the gas chamber connection, with the mixture export for mixing liquid chamber connection and mistake Filter the spray liquid entrance of processing unit connection and the temperature controller for measuring and controlling mixeding liquid temperature and for measuring and controlling The fluid level controller of mixed liquor liquid level processed, the exhaust gas entrance by piping connection blower, the blower by pipeline with it is described Cold and hot crosspoint connection；

The mixture export passes through pipeline by pipeline and the emersion object processing unit connection, the spray liquid entrance Connect the chemical dosing unit.

The cold and hot crosspoint include cold and hot crosspoint shell and be located at the cold and hot crosspoint enclosure interior Gravitational dust collection case and cool-heat-exchanger, and the cool-heat-exchanger is located on the gravitational dust collection case, the cold and hot exchange The top of unit housings is equipped with air inlet, and the side of the cold and hot crosspoint shell is equipped with thermometer, liquidometer and outlet Mouthful, the cool-heat-exchanger is equipped with inlet and outlet, water inlet and external cold water source pipeline connection, water outlet with it is external Drainage pipeline connection, the blower pass through pipeline and the gas outlet connection.

The emersion object processing unit include separator, concentrate tube pump, heater, hutch water device, auger conveyor and Pass through the sequentially connected dedusting container of pipeline, filtering container, saturation vessel, concentrate container, solid-liquid separator, the dedusting container It is equipped with mixed liquor import, the mixed liquor import and the mixture export pass through pipeline connection；The hutch water device with it is described Dedusting container and the filtering container connection are used for the dedusting container and the filtering container moisturizing；Hold in the dedusting Device, the saturation vessel, the concentrate container, is equipped with peep hole, sampling on the solid-liquid separator at the filtering container Mouth, thermometer hole and shut-off valve, with the bottom of corresponding each container by pipeline connection, the dedusting is held for the import of each shut-off valve Device, the filtering container, the saturation vessel bottom the equal connection of cut-off valve outlet in the auger conveyor, the concentration appearance The import of the cut-off valve outlet and the concentrate tube pump of device bottom passes through pipeline connection, the outlet of the concentrate tube pump and institute State one end connection of heater, one end connection of the other end of the heater and the separator, the separator it is another Filtering container, the saturation vessel, the concentrate container and the solid-liquid separator described in end while connection；The saturation is held Device passes through pipeline and the spray liquid entrance connection.

The filtration treatment unit includes multiple filtering modules integrated, and each filtering module includes branch Frame, even water distributor, dust removal filter element, liquid guide device, catalyzed filter element and sealing element, the dust removal filter element, the liquid are led Stream device, the catalyzed filter element, the even water distributor are successively installed on from bottom to top on the inside of the bracket, and the sealing element is rubber Glue is installed between the catalyzed filter element surrounding and the rack inner wall, is used for sealing fume, the catalyst filter core is that have The ceramics of porous structure.

The chemistry dosing unit includes including auxiliary agent dosing unit, reactant dosing unit, chemical industry additive dosing list Member and molding additive dosing unit；Each dosing unit include sequentially connected medicine container, meter, conveying equipment and Shut-off valve；The shut-off valve import of each dosing unit and corresponding conveying equipment connection, the shut-off valve of each dosing unit go out Mouth with the spray liquid entrance connection.

On the gas outlet be equipped with for monitor be discharged gas whether He Ge on-line monitoring unit.

The separator includes outer tube, the inner tube set on outer tube and the insulating tube that is placed between inner tube and outer tube, The insulating tube and the outer coaxial tube line, said inner tube with it is tangent in the insulating tube, said inner tube and the insulating tube with Tangent position is equipped with multiple oblong openings on opposite side；Heater described in one end connection of the outer tube, the other end Filtering container and the saturation vessel described in connection, also connection heater, the other end are divided into two-way, join all the way for said inner tube one end Lead to the solid-liquid separator, concentrate container described in another way connection, and is equipped with and cuts between the concentrate container and said inner tube Only valve.

The smoke processing system further includes the formed product unit with the emersion object processing unit connection, the product Forming unit includes construction material forming unit and chemical products forming unit；

The construction material forming unit includes the filter press, blender, former being sequentially connected, drying machine；The pressure Filter and the auger conveyor connection；

The chemical industry forming unit includes cooled dehydrated device, blender, the former being sequentially connected, cooling described in drying machine The outlet connection of dehydrator and solid-liquid separator bottom shut-off valve.

The invention also discloses a kind of flue gas processing methods comprising following steps:

Step 1: it is cooling to carry out flue gas: high-temperature flue gas is from coal-fired, fuel oil equipment smoke outlet discharge, into cold and hot exchange Unit is cooling, and flue-gas temperature is cooled to 80 DEG C hereinafter, the part dust in flue gas sinks down into cold and hot crosspoint bottom simultaneously, remains Remaining flue gas enters gas cleaning unit after being drawn by blower；

Step 2: carrying out purified treatment to flue gas after cooling: after flue gas enters gas cleaning unit, in auxiliary agent, water, removing Under the collective effect of water mist device and catalyzed filter element, oxysulfide, nitrogen oxides, carbon dioxide and reaction reaction in flue gas are raw It is dissolved in water at object, dust is deposited in water in flue gas, forms mixed liquor；Purified gas reaches after discharge standard directly Arrange Xiang great Qi.

The flue gas processing method further includes step 3: being handled emersion object comprising following steps:

(1) mixed liquor enters emersion object processing unit, pass sequentially through dedusting container, filtering container, saturation vessel into Row filtering, the lime-ash filtered out enter concentrate container concentration from dedusting container, filtering container bottom discharge, filtered solution, Not up to the solution of room temperature saturation enters gas cleaning unit circulation by spray liquid entrance, further absorbs oxygen vulcanization in flue gas Object, nitrogen oxides, carbon dioxide and dust, until reaching room temperature saturation, the mixed liquor after saturation enters heater and is followed Ring heating；

(2) solution for the saturation that reaches a high temperature during circulating-heating carries out gas-liquid separation in the separator, separates generation Vapor enters filtering container, saturation vessel recycles, and the crystal of precipitation enters solid-liquid separator and is separated by solid-liquid separation, point It separates out fixed crystal to be discharged by shut-off valve, the moisture for being separated by solid-liquid separation generation returns to concentrate container and is recycled.

The flue gas processing method further includes step 4: carrying out formed product to emersion object；It specifically includes:

The lime-ash that emersion object processing unit is discharged is sent into construction material forming unit by the auger conveyor and is carried out Processing, and the solid crystal object that emersion object processing unit is discharged are sent into the processing of chemical products forming unit by conveyer.

The specific steps processed in the flue gas processing method to lime-ash include:

Lime-ash feeding filter press press filtration is subjected to, filtered lime-ash is admitted to blender, is added in blender Additive is sufficiently stirred, and the mixture after stirring is admitted to former molding, after the processing of former, forms a variety of build It builds and uses brick, building brick feeding drier is dried；

The specific steps processed to solid crystal object include: further to take off solid crystal object feeding cooled dehydrated device Water, dewatered crystal are admitted to blender, and additive is added in blender and is sufficiently stirred, the mixture after stirring It is admitted to former molding, after the processing of former, forms a variety of ecological bricks, ecological brick feeding drier is dried.

Compared with the prior art, the invention has the beneficial effects that:

The first, energy saving.Flue gas ash removal, desulphurization and denitration are completed in the same device, and equipment volume is small, and it is empty to save land occupation Between, investment cost is low；It, which is designed, uses modularization, saves the set-up time.In operational process, due to sulfur dioxide and nitrogen oxidation Object has catalytic action each other, and some oxides in dust and sulfuric acid, nitric acid, carbonic acid can neutralize generation under the action of water Salt saves a large amount of denitration sulfur-removing additives；The recycling to save of water and mixed liquor uses water；Filter core can be repeatedly sharp With reduction filter core investment cost；Vulnerable part is less, reduces maintenance cost, and extends the service life of whole system.The flue gas Treatment process automatic control level is high, system resistance is small, and electric energy loss is few.

The second, environmentally friendly.It handles postindustrial flue gas emission and reaches minimum discharge standard

Nitrogen oxides≤30mg/m3

Sulfur dioxide≤20mg/m3

Sulfur trioxide≤2.5mg/m3

Dust≤5mg/m3

Mercury and compound≤0.003mg/m3

Under the synergistic effect of fume treatment each unit, entire fume treatment process is complete without dead angle in low temperature, normal pressure It is run under closed environment, regenerant is processed into product by recovery unit, and the water of output storage, abjection is real through collecting conduit success Existing complete-reclaiming, it is without secondary pollution.It has successfully cracked the improvement of puzzlement industrial smoke and had not only eliminated air environmental pollution but also off-gas recovery The technical problem produced a profit is recycled, this point is distinguishing feature of its equipment on environmental-protecting performance.

Third, security performance are high.This process safety is mainly manifested in: its entire technological design is low-temp low-pressure closing peace Complete explosion-proof running unit does not have dead angle in equipment, and No leakage, no leakage hot spot, the leakage of nuisance, not will cause nocuousness Gassing burn, is scalded, be wound, electricity wound, dust pollution accident.

4th, emersion object recycles, and reduces production cost.Its is specific as follows:

Emersion object, which be separated by solid-liquid separation, generates following product:

(1) deviate from heavy metallic oxide and heavy metal salt can be made into the construction materials such as road brick, building material brick.

(2) ecological brick, ecological compound land improving can be synthesized by deviating from the harmless objects such as sylvite, microcosmic salt, magnesium salts, calcium salt, selenium salt Agent etc.；The ecological brick of synthesis can for Desert Control, salt-soda soil, improve contaminated soil, it can also be used to which construction is three-dimensional raw State farming and animal husbandry.

(3) the unsaturated liquid circulation isolated uses.

In this way by the reasonable utilization to emersion object, enterprise operation cost is not only reduced, but also can produce economic effect Benefit realizes direct economic benefit type industrial smoke environment protection treating.

In conclusion the smoke processing system small investment, structure is simple, at low cost, and the abjection during gas cleaning Object not but not can be caused secondary pollution and waste, but also can increase income, be recycled investment with recycling and reusing Capital.

Detailed description of the invention

Fig. 1 is one schematic diagram of smoke processing system embodiment of the present invention；

Fig. 2 is two schematic diagram of smoke processing system embodiment of the present invention；

Fig. 3 is three schematic diagram of smoke processing system embodiment of the present invention；

Fig. 4 is smoke processing system example IV schematic diagram of the present invention；

Fig. 5 is the structure chart of filtering module in the present invention；

Fig. 6 is the structure chart of separator in the present invention；

Fig. 7 be in Fig. 6 of the present invention separator along the cross-sectional view of center line；

Fig. 8 is the right view of separator in Fig. 6 of the present invention.

Specific embodiment

In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention Specific embodiment elaborate.Many concrete details are explained in the following description convenient for adequately understanding this hair It is bright.But the present invention can be implemented with being much different from other modes described herein, those skilled in the art can not disobey It is similarly modified in the case where carrying on the back intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.

Embodiment one

Referring to Fig. 1, Fig. 5 to Fig. 8, the smoke processing system of the present embodiment includes the cold and hot crosspoint cooling for flue gas 1, it gas cleaning unit 2, the emersion object processing unit 3 for being handled the gas cleaning unit emersion object and is used for To the chemical dosing unit 4 of 2 dosing of gas cleaning unit.

Cold and hot crosspoint 1 is including cold and hot crosspoint shell 10 and inside the cold and hot crosspoint shell 10 Gravitational dust collection case 14 and cool-heat-exchanger 16, and the cool-heat-exchanger 16 is located on the gravitational dust collection case 14, the cold and hot friendship The top for changing unit housings 10 is equipped with air inlet 11, which is equipped with thermometer 12, liquidometer 13 And gas outlet 15.Cool-heat-exchanger 16 is equipped with water inlet 161 and water outlet 160, water inlet 161 and external cold water source pipeline Connection, water outlet 160 and external drainage pipeline connection.

Gas cleaning unit 2 is in tower-shaped comprising reactor shell 21, inside the reactor shell 21 from bottom to top according to It is secondary to be equipped with mixing liquid chamber 25, gas chamber 24, filter element 23, demister 22, gas outlet 20 is equipped at the top of the reactor shell 21, It is equipped on the side wall of the reactor shell 21 with the exhaust gas entrance 212 of 24 connection of gas chamber, with described and mixes liquid chamber 25 The spray liquid entrance 214 of logical mixture export 213 and 23 connection of filtration treatment unit, is equipped with online prison on gas outlet 20 Unit 200 is surveyed, exhaust gas entrance 212 passes through blower 26 and 15 connection of gas outlet.

Meanwhile it being additionally provided with the temperature controller 211 for measuring and controlling mixeding liquid temperature on the gas cleaning unit 2 and is used for The fluid level controller 210 of measurement and control mixed liquor liquid level.

The mixture export 213 passes through pipeline and 3 connection of emersion object processing unit, the spray liquid entrance 214 Pass through chemistry dosing unit 4 described in piping connection.

Filtration treatment unit 23 includes multiple filtering modules integrated, and each filtering module includes bracket 230, even water distributor 231, catalyzed filter element 232, liquid guide device 233, dust removal filter element 234, sealing element (not shown), institute State dust removal filter element 234, the liquid guide device 233, the catalyzed filter element 232, the even water distributor 231 successively from bottom to top It is installed on 230 inside of bracket, the sealing element is rubber, is installed on 232 surrounding of catalyzed filter element and the bracket 230 Between inner wall, it is used for sealing fume, the catalyst filter core 232 to be one kind with aluminium oxide, titanium oxide, zirconium oxide isoreactivity metal Oxide is through having the high technology ceramics of porous structure made of high temperature sintering.

Emersion object processing unit 3 includes separator 30, concentrate tube pump 38, heater 39, hutch water device 36, auger conveyor 37 and by the sequentially connected dedusting container 31 of pipeline, filtering container 32, saturation vessel 33, concentrate container 34, be separated by solid-liquid separation Device 35.Dedusting container 31 is equipped with mixed liquor import 310, and the mixed liquor import 310 and mixture export 27 pass through pipeline connection. The hutch water device 36 and the dedusting container 31 and 32 connection of filtering container, are used for the dedusting container 31 and the mistake 32 moisturizing of container is filtered, while also indirectly by concentrate container 34 to 2 moisturizing of gas cleaning unit；Hold in dedusting container 31, filtering Device 32, concentrate container 34, is equipped with peep hole, thief hatch, thermometer hole and shut-off valve on solid-liquid separator 35 at saturation vessel 33, The import of each shut-off valve passes through pipeline connection with the bottom of above-mentioned corresponding each container.Dedusting container 31, is satisfied at filtering container 32 With container 33 by the equal connection of cut-off valve outlet of bottom and auger conveyor 37, the cut-off valve outlet of 34 bottom of concentrate container with The import of concentrate tube pump 38 passes through pipeline connection, the outlet of concentrate tube pump 38 and one end connection of heater 39, heater One end connection of 39 other end and separator 30, the other end of separator 30 connection filtering simultaneously container 32, saturation vessel 33, Concentrate container 34 and solid-liquid separator 35；Saturation vessel 33 passes through pipeline and 214 connection of spray liquid entrance.

The separator 30 include outer tube 302, set on outer tube inner tube 300 and be placed on inner tube 300 and outer tube 302 Between insulating tube 301,302 coaxial line of the insulating tube 301 and the outer tube, in said inner tube 300 and the insulating tube 301 It is tangent, multiple oblong openings 303 are equipped on said inner tube 300 and the side opposite with tangent position of the insulating tube 301. One end connection heater 39 of the outer tube 302, filtering container 32 and the saturation vessel 33 described in other end connection, it is described in Also connection heater 39, the other end are divided into two-way to 300 one end of pipe, all the way solid-liquid separator 35 described in connection, another way connection institute Concentrate container 34 is stated, and is equipped with shut-off valve between the concentrate container 34 and said inner tube 300.

Chemical dosing unit 4 includes auxiliary agent dosing unit 40 and reactant dosing unit 41, the auxiliary agent dosing unit 41 packet Sequentially connected auxiliary tank 400, meter 401, pipeline pump 402, blending tank 403 and shut-off valve 404 are included, the reactant dosing list Member 41 includes sequentially connected reactant tank 410, meter 411, pipeline pump 412, blending tank 413, shut-off valve 414.Shut-off valve 404, the outlet of shut-off valve 414 passes through pipeline connection with spray liquid entrance 29.

When smoke processing system is started to work, auxiliary agent dosing unit 40, reactant dosing unit 41 start simultaneously at work, And auxiliary agent and reactant required for being reacted by spray liquid entrance 29 to the addition of gas cleaning unit 2；Simultaneously between hutch water device 36 It connected concentrate container 34 and supplements water required for gas cleaning to gas cleaning unit 2.

In the treatment process of flue gas, flue gas enters cool-heat-exchanger unit 1 by air inlet 11, and flue gas is cold by recycling But after temperature be down to 80 DEG C hereinafter, and during the circulating cooling of flue gas, the bulky grain dust in flue gas is by heat exchange unit In 1 cold water intercept, fall into gravitational dust collection case 14.Flue gas after cooling is guided by blower 26 to gas cleaning unit 2 Discarded entrance 212, flue gas enters gas cleaning unit 2 and starts to purify.At this moment flue gas passes through filter element 23 from bottom to top, Dust, heavy metallic oxide, oxysulfide, nitrogen oxides, oxycarbide in flue gas are successively got rid of, and are formed with aqueous solution Mixed liquor, the mixed liquor are entered in mixing liquid chamber 25 by liquid guide device 233；Some water is vaporized into is had since smoke temperature is higher Steam carries steam by the clean gas of abjection harmful substance and continues upward through except water mist device 22, and at this moment steam is removed water mist Device 22 is removed and is flowed downwardly into mixing liquid chamber 25, and is passed through the clean gas dehydrated except water mist device 22 and continued up again After monitoring unit 200 on-line, enter atmosphere from gas outlet 20.If it is exceeded that gas contains nuisance, unit is monitored on-line 200 will show and control the supply amount that chemical dosing unit 4 increases auxiliary agent and reactant, until gas emission compliance is normal.

Mixed liquor is expelled to emersion object processing unit 3 from mixture export 213, by the mixed liquor on dedusting container 31 into Mouth 310 enters dedusting container 31.The mixed liquor first passes through 31 primary filtration of dedusting container, subsequently into filtering 32 2 mistakes of container Filter, filtered mixed liquor go successively to saturation vessel 33 and filter three times, pass through pipeline if mixed liquor unsaturation and drain into cigarette The spray liquid entrance 214 of gas clean unit 2, continues cycling through；Enter if mixed liquor reaches saturation state concentrate container 34 into Row concentration.Concentrate tube pump 38 by saturated solution from concentrate container 34 be pumped into heater 39 heat, the solution after heating into Enter separator 30 and carry out gas-liquid separation, the vapor generated after separation enters filtering container 32 and saturation vessel by outer tube 301 33, it is separated by solid-liquid separation by inner tube 300 into solid-liquid separator 35 if extraction raffinate reaches a high temperature saturation after separation, if remaining Liquid is not up to height and has enough to eat and wear, then goes successively to the circulation concentration of concentrate container 34.High temperature saturated solution is separated by solid-liquid separator 35 Afterwards, the water of generation enters concentrate container 34, and the crystal of generation is discharged from the bottom shut-off valve of solid-liquid separator 35.Effluent is big Mostly it is the complex salt of sulfate, nitrate, carbonate and its crystallization water, can be used as composite fertilizer material.

During the filtration cycle of mixed liquor, the lime-ash filtered out passes through dedusting container 31, filtering container 32, saturation The shut-off valve of 33 bottom of container flows out, by auger conveyor 37 by all Ash waters to ash collection device, these lime-ash It can be used as construction material.

In addition, the hutch water device 36 in emersion object processing unit 3 is mended to dedusting container 31, filtering 32 real-time perfoming of container Water, it is ensured that water is constant in each container.

Room temperature unsaturated solution enters the uniform cloth of gas cleaning unit 2 by spray liquid entrance 214 in saturation vessel 33 Hydrophone 213 is recycled, and when 213 water excess of even water distributor, fluid level controller 210 will control water supplement apparatus work and adjust Whole inflow.By controlling temperature in external cold source adjusting reactor enclosure body, overtemperature, holding do not work normally temperature controller 211.

Embodiment two

Referring to fig. 2, on the basis of example 1, the heater 39 in emersion object processing unit 3, concentrate tube pump are removed 161 connection of water inlet of 38 outlet and cool-heat-exchanger 16, the entrance of the separator 30 in emersion object processing unit 3 with it is cold and hot 161 connection of water outlet of exchanger 16.The room temperature saturated solution of the extraction of concentrate tube pump 38 is as cool-heat-exchanger 16 in this way Cold water source, and the high-temperature flue gas in cold and hot crosspoint 1 as emersion object processing unit 3 heating source instead of in embodiment one Heater 39.

This embodiment eliminates cold water source and heater compared with embodiment one, and the waste heat of flue gas, i.e. energy-saving ring is utilized It protects, while decreasing the manufacture maintenance cost of the smoke processing system.

Embodiment three

Referring to Fig. 3, on the basis of embodiment one or embodiment two, increase in the side wall of cold and hot crosspoint shell 10 The mixed liquor dedusting entrance 17 communicated with gravitational dust collection case 14 and mixed liquor dedusting outlet 18.Specific implementation are as follows: gas cleaning list Mixture export 27 in member 2 with also the dedusting of connection mixed liquor enters while mixed liquor 310 connection of import on dedusting container 31 Mouth 17, mixed liquor dedusting export the mixed liquor import 310 on 18 connection dedusting containers 31.In this way, being mixed during gas cleaning It closes liquid and is divided into two-way after the outflow of mixture export 27, a-road-through crosses mixed liquor dedusting entrance 17 and enters gravitational dust collection case 14, will The bulky grain dust of precipitating is gone out from mixed liquor dedusting outlet 18, enters dedusting container 31 by mixed liquor import 310；And it is another Road then directly enters dedusting container 31 by mixed liquor import 310.

This embodiment increases a mixed liquor and washes away the logical of gravitational dust collection case 14 compared with embodiment one or embodiment two Road, it can be achieved that gravitational dust collection case 14 online scrub cleaning, eliminate the workload artificially cleared up, while improving entire flue gas The working efficiency of processing system.

Example IV

Referring to fig. 4, on the basis of embodiment one, embodiment two or embodiment three, increase formed product unit 5, and Increase chemical industry additive dosing unit 42 and molding additive dosing unit 43, the formed product list in chemical dosing unit 4 Member 5 and 3 connection of emersion object processing unit.

It is specific as follows:

Chemical industry additive dosing unit 42 include sequentially connected auxiliary tank 420, meter 421, screw(-type) feeder 422, Blending tank 423 and shut-off valve 424,

Forming agent dosing unit 43 includes sequentially connected auxiliary tank 430, meter 431, screw(-type) feeder 432, mixing Tank 433 and shut-off valve 434,

Formed product unit 5 includes construction material forming unit 50 and chemical products forming unit 51.Construction material molding Unit 50 includes filter press 500, blender 501, former 502, and filter press 500 receives the ash that the conveying of auger conveyor 37 comes Slag carries out band press filtration, and filtered lime-ash enters blender 501, while chemical industry additive dosing unit 42 is to blender 511 In add additive, enter former 502 after mixing evenly in lime-ash and additive and be processed into various structure materials.The molding Device 502 can be commercially available the molding machine of various standard specifications.The structure material may include different kinds of roads brick or building material brick Deng.

Chemical products forming unit 5 includes cooled dehydrated device 510, blender 511, former 512, cooled dehydrated device 510 Receive the crystal that be discharged from the bottom shut-off valve of solid-liquid separator 35, progress cooled dehydrated, crystal after cooled dehydrated into Enter blender 511, while chemical industry additive dosing unit 42 is to the inner addition additive of blender 511, in crystal and additive After mixing evenly enter former 512 be processed into various ecological bricks, the former can be commercially available various standard specifications at Type machine.The ecological brick can for Desert Control, salt-soda soil, improve contaminated soil, it can also be used to build stereo ecological agriculture Animal husbandry.

The present invention also provides a kind of flue gas processing methods, have following embodiment:

Embodiment one

The flue gas processing method includes the following steps:

It is cooling to carry out flue gas: high-temperature flue gas is cold into cold and hot crosspoint from coal-fired, fuel oil equipment smoke outlet discharge But, flue-gas temperature is cooled to 80 DEG C hereinafter, the part dust in flue gas sinks down into cold and hot crosspoint bottom, remaining flue gas simultaneously Enter gas cleaning unit after being drawn by blower；

Purified treatment is carried out to flue gas after cooling: after flue gas enters gas cleaning unit, in auxiliary agent, water, removing water mist device And under the collective effect of catalyzed filter element, oxysulfide, nitrogen oxides, carbon dioxide and reaction reaction, product are molten in flue gas In Xie Shui, dust (including part heavy metal) is deposited in water in flue gas, forms mixed liquor；Purified gas reaches discharge Xiang great Qi is directly arranged after standard.

Embodiment two

A kind of flue gas processing method further includes on the basis of example 1 the processing method of emersion object, the emersion object Processing method is as follows:

The mixed liquor enters emersion object processing unit, passes sequentially through dedusting container, filtering container, saturation vessel and carries out Filtering, the lime-ash filtered out enter concentrate container concentration from dedusting container, filtering container bottom discharge, filtered solution, not The solution for reaching room temperature saturation enters gas cleaning unit circulation by spray liquid entrance, enters after reaching the solution of room temperature saturation Heater carries out circulating-heating；

The solution for the saturation that reaches a high temperature during circulating-heating carries out gas-liquid separation in the separator, and the water for separating generation steams Gas enters filtering container, saturation vessel recycles, and the crystal of precipitation enters solid-liquid separator and is separated by solid-liquid separation, solid-liquid point Moisture from generation returns to concentrate container and is recycled, and the solid crystal object isolated can be used as chemical fertilizer utilization.

Embodiment three

A kind of flue gas processing method further includes on the basis of example 2 the formed product method of emersion object, the abjection The formed product method of object is as follows:

By the emersion object processing unit be discharged lime-ash by auger conveyor feeding construction material forming unit into Row processing, its step are as follows:

Lime-ash feeding filter press press filtration is subjected to, filtered lime-ash is admitted to blender, is added in blender Additive is sufficiently stirred, and the mixture after stirring is admitted to former molding, after the processing of former, forms a variety of build It builds and uses brick, building brick feeding drier is dried.

Chemical products forming unit is sent by conveyer by the solid crystal object that the emersion object processing unit is discharged Processing, its step are as follows:

Solid crystal object feeding cooled dehydrated device is further dehydrated, dewatered crystal is admitted to blender, is stirring Addition additive in device to be mixed to be sufficiently stirred, the mixture after stirring is admitted to former molding, after the processing of former, A variety of ecological bricks are formed, ecological brick feeding drier is dried.

The above, good specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto, appoints In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, all by what those familiar with the art It is covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection scope of claims Subject to.

Claims

1. A flue gas treatment system, characterized in that it comprises a cold and heat exchange unit for cooling flue gas, a flue gas purification unit, an extract processing unit for processing the extract from the flue gas purification unit, and a chemical dosing unit for dosing the flue gas purification unit;

The flue gas purification unit is in the shape of a tower, which includes a reactor shell. Inside the reactor shell, a mixed liquid chamber, an air chamber, a filtration processing unit, and a mist eliminator are sequentially arranged from bottom to top. The top of the shell is provided with an air outlet, and the side wall of the reactor shell is provided with a waste gas inlet communicated with the gas chamber, a mixed liquid outlet communicated with the mixed liquid chamber, and a spray liquid communicated with the filter processing unit The inlet and the temperature controller for measuring and controlling the temperature of the mixed liquid and the liquid level controller for measuring and controlling the liquid level of the mixed liquid, the exhaust gas inlet is connected to a fan through a pipeline, and the fan is connected to the cooling device through a pipeline. The heat exchange unit is connected;

The mixed liquid outlet is communicated with the exudate processing unit through a pipeline, and the spray liquid inlet is connected to the chemical dosing unit through a pipeline;

The cold and heat exchange unit includes a cold and heat exchange unit casing, a gravity dust removal box and a cold heat exchanger located inside the cold and heat exchange unit casing, and the cold heat exchanger is located above the gravity dust removal box, The upper part of the cold and heat exchange unit casing is provided with an air inlet, the side of the cold and heat exchange unit casing is provided with a thermometer, a liquid level gauge and an air outlet, and the cold heat exchanger is provided with a water inlet and an outlet. the water inlet, the water inlet is communicated with the external cold water source pipeline, the water outlet is communicated with the external drainage pipeline, and the fan is communicated with the air outlet through the pipeline;

The exudate processing unit includes a separator, a concentrated liquid pipe pump, a heater, a water replenisher, a screw conveyor, and a dust removal container, a filter container, a saturation container, a concentration container, and a solid-liquid separator sequentially connected by pipelines. A mixed liquid inlet is arranged on the dust removal container, and the mixed liquid inlet is communicated with the mixed liquid outlet through a pipeline; The filter container is filled with water; the dust removal container, the filter container, the saturation container, the concentration container, and the solid-liquid separator are all provided with an observation hole, a sampling port, a temperature measurement hole and a stop valve. The inlets of each stop valve are communicated with the bottoms of the corresponding containers through pipelines, the outlet of the stop valves at the bottom of the dust removal container, the filter container, and the saturation container are all communicated with the screw conveyor, and the bottom of the concentration container is connected to the screw conveyor. The outlet of the cut-off valve is communicated with the inlet of the concentrated liquid pipe pump through a pipeline, the outlet of the concentrated liquid pipe pump is communicated with one end of the heater, and the other end of the heater is communicated with one end of the separator , the other end of the separator communicates with the filter container, the saturation container, the concentration container and the solid-liquid separator at the same time; the saturation container is communicated with the spray liquid inlet through a pipeline.

2 . The flue gas treatment system according to claim 1 , wherein the filter treatment unit comprises a plurality of integrated filter modules, and each of the filter modules includes a bracket, a uniform water distributor, a dust removal filter element, Liquid deflector, catalytic filter element and seal, the dust filter element, the liquid deflector, the catalytic filter element, and the uniform water distributor are sequentially installed on the inside of the bracket from bottom to top, and the seal It is rubber and is installed between the surrounding of the catalytic filter element and the inner wall of the bracket to seal the flue gas. The catalytic filter element is a ceramic with a porous structure.

3. The flue gas treatment system according to claim 1, wherein the chemical dosing unit comprises an auxiliary dosing unit, a reactant dosing unit, a chemical additive dosing unit and a molding additive dosing unit; Each dosing unit includes a drug-containing container, a meter, a conveying device and a shut-off valve connected in sequence; the inlet of the shut-off valve of each dosing unit is communicated with the corresponding conveying device, and the outlet of the shut-off valve of each dosing unit is connected to the corresponding conveying device. The spray liquid inlets are communicated.

4 . The flue gas treatment system according to claim 1 , wherein an on-line monitoring unit for monitoring whether the exhaust gas is qualified is provided on the gas outlet. 5 .

5 . The flue gas treatment system according to claim 1 , wherein the separator comprises an outer pipe, an inner pipe arranged inside the outer pipe, and an insulating pipe sleeved between the inner pipe and the outer pipe, and the The heat preservation pipe and the outer pipe are coaxial, the inner pipe is tangent to the interior of the heat preservation pipe, and the inner pipe and the heat preservation pipe are provided with a plurality of rectangular openings on the side opposite to the tangent part; One end of the outer tube is communicated with the heater, the other end is communicated with the filter container and the saturation container, one end of the inner tube is also communicated with the heater, the other end is divided into two channels, and the other end is communicated with the solid-liquid separator, The other path communicates with the concentration container, and a stop valve is provided between the concentration container and the inner pipe.

6. The flue gas treatment system according to claim 1, further comprising a product forming unit communicated with the exudate processing unit, the product forming unit comprising a building material forming unit and a chemical product forming unit;

The building material forming unit includes a filter press, a stirrer, a former, and a dryer connected in sequence; the filter press communicates with the screw conveyor;

The chemical product forming unit includes a cooling dehydrator, a stirrer, and a former that are connected in sequence, and the cooling dehydrator of the dryer communicates with the outlet of the cut-off valve at the bottom of the solid-liquid separator.

7. A flue gas treatment method, characterized in that it comprises the steps:

Step 1. Cool the flue gas: the high-temperature flue gas is discharged from the exhaust port of the coal-fired and fuel-fired equipment, and enters the cold and heat exchange unit for cooling. At the bottom of the heat exchange unit, the remaining flue gas is drawn out by the fan and then enters the flue gas purification unit;

Step 2: Purify the cooled flue gas: after the flue gas enters the flue gas purification unit, under the combined action of additives, water, water mist remover and catalytic filter element, oxygen sulfide and nitrogen oxides in the flue gas will be removed. , carbon dioxide reacts with the reactant, the product is dissolved in water, and the dust in the flue gas is precipitated into the water to form a mixed liquid; the purified gas is directly discharged to the atmosphere after reaching the emission standard;

Step 3, the exudate is processed, and it comprises the following steps:

(1) the mixed solution enters the extraction product processing unit, and is filtered through the dust removal container, the filter container and the saturated container successively, and the filtered ash residue is discharged from the bottom of the dust removal container and the filter container, and the filtered solution enters the concentration container for concentration, and does not The solution saturated at room temperature enters the flue gas purification unit through the spray liquid inlet for circulation, and further absorbs oxysulfide, nitrogen oxides, carbon dioxide and dust in the flue gas until it reaches room temperature saturation, and the saturated mixture enters the heater for circulating heating ;

(2) The solution that reaches high temperature and saturation during the circulating heating process is separated from gas and liquid in the separator, the water vapor generated by separation enters the filter container and the saturated container for recycling, and the precipitated crystals enter the solid-liquid separator for solid-liquid separation and separation. The fixed crystals are discharged through the shut-off valve, and the water produced by the solid-liquid separation is returned to the concentration container for recycling.

8. The flue gas treatment method according to claim 7, further comprising step 4: product molding of the exudate; specifically comprising:

The ash and slag discharged from the product processing unit is sent to the building material forming unit through the screw conveyor for processing, and the solid crystals discharged from the product processing unit are sent to the chemical product forming unit through the conveyor for processing.

9. The flue gas treatment method according to claim 8, wherein the specific steps of processing the ash and slag include:

The ash residue is sent to the filter press for pressure filtration, the filtered ash residue is sent to the mixer, the additive is added to the mixer for full mixing, and the stirred mixture is sent to the shaper for molding, and processed by the shaper. After that, a variety of building bricks are formed, and the building bricks are sent to the dryer for drying;

The specific steps of processing the solid crystals include: sending the solid crystals to a cooling dehydrator for further dehydration, the dehydrated crystals are sent to a stirrer, adding additives to the stirrer for full stirring, and the stirred mixture is sent to the mixer. After being processed by the former, a variety of ecological bricks are formed, and the ecological bricks are sent to the dryer for drying.