CN102689945A - Device for treating alkaliferous waste water through nanofiltration - Google Patents
Device for treating alkaliferous waste water through nanofiltration Download PDFInfo
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- CN102689945A CN102689945A CN2011100806599A CN201110080659A CN102689945A CN 102689945 A CN102689945 A CN 102689945A CN 2011100806599 A CN2011100806599 A CN 2011100806599A CN 201110080659 A CN201110080659 A CN 201110080659A CN 102689945 A CN102689945 A CN 102689945A
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- Prior art keywords
- water
- nanofiltration
- waste water
- pool
- backflow pool
- Prior art date
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- 239000002351 wastewater Substances 0.000 title claims abstract description 61
- 238000001728 nano-filtration Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000003513 alkali Substances 0.000 claims abstract description 43
- 239000012528 membrane Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 5
- 239000002585 base Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract 2
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000003860 storage Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The invention discloses a device for treating alkaliferous waste water through nanofiltration and relates to the field of waste water treatment. The device comprises a water storage tank, wherein a pump is connected with a pretreatment pool; the pretreatment pool is connected with a backflow pool; a valve is arranged between the pretreatment pool and the backflow pool; the backflow pool is connected with the pump through the valve and is connected to a nanofiltration device; a drainage port of the nanofiltration device is connected with a pure water tank; concentrated liquid outlets are respectively connected with the backflow pool through the valve; the nanofiltration device is formed in a way that an upper cover with a pressure gauge and a liquid inlet is connected with a nanofiltration tank body through a flange; a water distributor with a water distribution hole is arranged at a lower end of the upper cover; a nanofiltration film is formed on the water distribution hole; the other end of the nanofiltration film is connected to a water collection hole of a water collector at the bottom of the tank body; the water collection hole is connected with an outlet at the bottom end of the tank body; and a water outlet is also arranged on the upper end of the tank body. With the adoption of the device, the environment pollution to alkaliferous waste water in the industrial production is solved, the alkali in the waste water is recovered, and the phenomena that the cost is increased and the resources are wasted because a large amount of sulfuric acid or hydrochloric acid needs to be consumed when alkaliferous waste water is treated by neutralizational process can be avoided.
Description
Technical field
The present invention relates to field of waste water treatment, relate in particular to a kind of nanofiltration processing and contain the alkali waste water device.
Background technology
At present, in industries such as paper-making industry, petrochemical compleies, all producing a large amount of alkali waste waters that contains, be not only a kind of pollution to environment, and be a kind of waste every day, but it is very inconvenient to contain the processing of alkali waste water, and effect can not be satisfactory.The producer that has like the alkali decrement waste water and the mercerizing waste water of printing and dyeing mill adopts evaporation concentration method to reclaim alkali, effect is not very good, handles still alkalescence of back discharge water; This method can't resolve the root problem that contains alkali waste water, simultaneously, does very inconvenient; So the producer that has does not reclaim, just carry out neutralizing treatment, when middle neutralisation is handled alkaline waste water with acid; Need to consume a large amount of sulfuric acid or hydrochloric acid, the further biochemical treatment of neutralization back waste water ability, such treatment process big said producer is at present all adopting; They lose valuable alkali resource in vain, also will drop into a lot of acid, bring working cost to increase to wastewater treatment; Ceng Ziyuan slatterns again, and the water quality after the processing is also very undesirable.All do not have effectively to handle regardless of the alkali waste water that contains that contains alkali waste water or other industry that is dyeing at present; And can recycle alkali; Alkali in the waste water all can not thoroughly reclaim; The waste water Chinese style alkalescence of getting rid of, it can be the discharging that exceeds standard that the alkaline waste water pH value surpasses 9.0, at present a lot of producers all do not contain the alkali waste water worries for there being good method to handle.
Summary of the invention
Technical problem to be solved by this invention is: 1, effectively handle the alkali in the waste water, make eliminating water can reach 3 types of water quality standards, the 2 middle alkali with waste water concentrate purifies, and reaches the purpose of recycling.The present invention provides a kind of nanofiltration to handle method and the isolated plant that contains alkali waste water for this reason.
The objective of the invention is to realize through following technical scheme: the present invention has designed a kind of isolated plant.The device that contains alkali waste water is handled in a kind of nanofiltration, comprises tank, links with pump and pretreatment pool; Pretreatment pool connects backflow pool; And be provided with valve between pretreatment pool and the backflow pool, backflow pool is connected to nanofiltration device from being connected with pump through valve; The water port of nanofiltration device is connected with the pure water pond, and the dope outlet connects backflow pool respectively through valve.Its special character is that described nanofiltration device is by the loam cake that has tensimeter and fluid inlet; Be connected with the nanofiltration tank body through flange; Be provided with the water distributor of water distributing pore in the loam cake lower end, on the portion water hole, nf membrane be installed, the nf membrane the other end is linked on the gully-hole of water collector of tank base; Gully-hole is connected with the outlet of tank body bottom, also is provided with a water outlet in the upper end of tank body.
For further realizing goal of the invention of the present invention, the preferred version of technique scheme is:
The nf membrane of holding back 40D that above-mentioned nanofiltration device adopts, WP are at 0.5-0.9mPa, and filter type adopts cross flow filter.
Above-mentioned nanofiltration device WP is at 0.7mPa.
Above-mentioned nf membrane is the tubular fibre formula.
The present invention compared with prior art; Have following outstanding substantive distinguishing features and obvious improvement, concrete manifestation in the following areas: 1, flow process is simple, and whole process engineering of the present invention has only pre-treatment, advanced treatment and recycling several steps; Clear process is simple.2, treatment effect is good, in this technological process, has adopted the mode of nanofiltration cross-flow, has utilized the characteristics of nf membrane, effectively concentrates alkali in the waste water of having purified, and can satisfy the needs of the recycling of alkali, can reach 3 types of water quality standards especially and get rid of water.3, expense is few, and economic benefit is high, and technology of the present invention has reduced the mode of acid-base neutralisation, mainly be the characteristic of utilizing nf membrane, and the mode of cross-flow can effectively be cleared up the pollutent on the nf membrane, improves the work-ing life and the life cycle of film.
Description of drawings
The device that contains alkali waste water is handled in a kind of nanofiltration of the present invention, is provided by following accompanying drawing:
Fig. 1 handles the process flow sheet of the method that contains alkali waste water for nanofiltration;
Fig. 2 is the nanofiltration device structural representation.
Embodiment:
Below in conjunction with accompanying drawing, further the device explanation that contains alkali waste water is handled in a kind of nanofiltration of the present invention.
The technology of the method that contains alkali waste water is handled in a kind of nanofiltration, and (referring to Fig. 1, Fig. 2), its technical process does; Waste water gets into tank 1,2, links with pump 8 and pretreatment pool 3, and pretreatment pool 3 connects backflow pool 4,5; And pretreatment pool 3 and backflow pool 4, be provided with valve 10,11 between 5, backflow pool 4,5 is connected with pump 9 through valve 12,13 separately, is connected to nanofiltration device 6; The water port of nanofiltration device 6 is connected with pure water pond 7, and the dope outlet connects backflow pool 4,5 respectively through valve 14,15.When normal operation was, tank 2 and backflow pool 5 were as standby pool.
Below in conjunction with actually operating, be example to handle paper-making industry waste water, explain this technical process.At first contain alkali waste water and flow into tank 1, through preliminary filtration, remove big foreign material at tank 1; Big particle pumps into pretreatment pool 3 with pump 8 with the waste water in the tank 1, and further the alkali waste water that contains of sedimentation processing flows into backflow pool 4 in pretreatment pool 3; After filling with backflow pool 4, close the valve 10 of pretreatment pool 3 and backflow pool 4 alkali, pump 9 is the nanofiltration device 6 of 0.5mPa with the waste water PIP in the backflow pool 4 simultaneously; Waste water is got into by nanofiltration device loam cake 6-7 fluid inlet 6-1; Fluid inlet is provided with tensimeter, and waste water is behind water distributor 6-2, after the entering aperture is the tubular fibre formula nf membrane 6-3 of 40D; Spissated waste water is compiled by the water collector 6-4 that is arranged on tank body 6-8 bottom, and water is after filtering discharged by water port 6-5.Dope after nanofiltration device 6 cross-flows are handled flows into pure water pond 7 by the water that liquid outlet 6-6 discharges, and liquid concentrator is back to backflow pool 4.Waste water circulation in the backflow pool 4 is flowed between nanofiltration device 6 and backflow pool 4 repeatedly, when the content of the alkali in the backflow pool 4 reaches 35%, can recycle alkali in the backflow pool 4.
Below in conjunction with actually operating, be example to handle paper-making industry waste water, explain this technical process.At first contain alkali waste water and flow into tank 1, through preliminary filtration, remove big foreign material at tank 1; Big particle pumps into pretreatment pool 3 with pump 8 with the waste water in the tank 1, and further the alkali waste water that contains of sedimentation processing flows into backflow pool 4 in pretreatment pool 3; After filling with backflow pool 4, close the valve 10 of pretreatment pool 3 and backflow pool 4 alkali, pump 9 is the nanofiltration device 6 of 0.9mPa with the waste water PIP in the backflow pool 4 simultaneously; Waste water is got into by nanofiltration device loam cake 6-7 fluid inlet 6-1; Fluid inlet is provided with tensimeter, and waste water is behind water distributor 6-2, after the entering aperture is the tubular fibre formula nf membrane 6-3 of 40D; Spissated waste water is compiled by the water collector 6-4 that is arranged on tank body 6-8 bottom, and water is after filtering discharged by water port 6-5.Dope after nanofiltration device 6 cross-flows are handled flows into pure water pond 7 by the water that liquid outlet 6-6 discharges, and liquid concentrator is back to backflow pool 4.Waste water circulation in the backflow pool 4 is flowed between nanofiltration device 6 and backflow pool 4 repeatedly, when the content of the alkali in the backflow pool 4 reaches 35%, can recycle alkali in the backflow pool 4.
Embodiment 3
Below in conjunction with actually operating, be example to handle paper-making industry waste water, explain this technical process.At first contain alkali waste water and flow into tank 1, through preliminary filtration, remove big foreign material at tank 1; Big particle pumps into pretreatment pool 3 with pump 8 with the waste water in the tank 1, and further the alkali waste water that contains of sedimentation processing flows into backflow pool 4 in pretreatment pool 3; After filling with backflow pool 4, close the valve 10 of pretreatment pool 3 and backflow pool 4 alkali, pump 9 is the nanofiltration device 6 of 0.7mPa with the waste water PIP in the backflow pool 4 simultaneously; Waste water is got into by nanofiltration device loam cake 6-7 fluid inlet 6-1; Fluid inlet is provided with tensimeter, and waste water is behind water distributor 6-2, after the entering aperture is the tubular fibre formula nf membrane 6-3 of 40D; Spissated waste water is compiled by the water collector 6-4 that is arranged on tank body 6-8 bottom, and water is after filtering discharged by water port 6-5.Dope after nanofiltration device 6 cross-flows are handled flows into pure water pond 7 by the water that liquid outlet 6-6 discharges, and liquid concentrator is back to backflow pool 4.Waste water circulation in the backflow pool 4 is flowed between nanofiltration device 6 and backflow pool 4 repeatedly, when the content of the alkali in the backflow pool 4 reaches 35%, can recycle alkali in the backflow pool 4.
Claims (4)
1. the isolated plant that contains alkali waste water is handled in a nanofiltration, comprises tank, links with pump and pretreatment pool; Pretreatment pool connects backflow pool; And be provided with valve between pretreatment pool and the backflow pool, backflow pool is connected to nanofiltration device from being connected with pump through valve; The water port of nanofiltration device is connected with the pure water pond, and the dope outlet connects backflow pool respectively through valve.It is characterized in that described nanofiltration device is by the loam cake that has tensimeter and fluid inlet; Be connected with the nanofiltration tank body through flange; Be provided with the water distributor of water distributing pore in the loam cake lower end, on the portion water hole, nf membrane be installed, the nf membrane the other end is linked on the gully-hole of water collector of tank base; Gully-hole is connected with the outlet of tank body bottom, also is provided with a water outlet in the upper end of tank body.
2. the isolated plant that contains alkali waste water is handled in nanofiltration according to claim 1, and the nf membrane of holding back 40D that its characteristic adopts in described nanofiltration device, WP are at 0.5-0.9mPa, and filter type adopts cross flow filter.
3. the isolated plant that contains alkali waste water is handled in nanofiltration according to claim 2, its characteristic in described nanofiltration device WP at 0.7mPa.
4. the isolated plant that contains alkali waste water is handled in nanofiltration according to claim 2, and its characteristic is the tubular fibre formula in described nf membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100806599A CN102689945A (en) | 2011-03-24 | 2011-03-24 | Device for treating alkaliferous waste water through nanofiltration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100806599A CN102689945A (en) | 2011-03-24 | 2011-03-24 | Device for treating alkaliferous waste water through nanofiltration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102689945A true CN102689945A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100806599A Pending CN102689945A (en) | 2011-03-24 | 2011-03-24 | Device for treating alkaliferous waste water through nanofiltration |
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| CN (1) | CN102689945A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301489A (en) * | 2018-02-09 | 2018-07-20 | 刘诗军 | Pipeline system and control method thereof |
| CN112624363A (en) * | 2020-11-22 | 2021-04-09 | 山东奥美环境股份有限公司 | Alkali recovery process and recovery device for alkali-containing wastewater |
-
2011
- 2011-03-24 CN CN2011100806599A patent/CN102689945A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301489A (en) * | 2018-02-09 | 2018-07-20 | 刘诗军 | Pipeline system and control method thereof |
| CN108301489B (en) * | 2018-02-09 | 2024-03-26 | 苏州洁畅环保科技有限公司 | Pipeline system and control method thereof |
| CN112624363A (en) * | 2020-11-22 | 2021-04-09 | 山东奥美环境股份有限公司 | Alkali recovery process and recovery device for alkali-containing wastewater |
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Application publication date: 20120926 |