CN114798003A - Automatic ion exchange resin regeneration system and method - Google Patents
Automatic ion exchange resin regeneration system and method Download PDFInfo
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- CN114798003A CN114798003A CN202210466537.1A CN202210466537A CN114798003A CN 114798003 A CN114798003 A CN 114798003A CN 202210466537 A CN202210466537 A CN 202210466537A CN 114798003 A CN114798003 A CN 114798003A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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- B01J49/30—Electrical regeneration
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Abstract
本发明属于材料处理技术领域，涉及一种全自动离子交换树脂再生系统及方法，再生系统包括反应壳体、离子交换膜以及纯水罐；离子交换膜为两个，两个离子交换膜并行且均垂直放置于反应壳体内底面上，两个离子交换膜的侧壁均与反应壳体内壁相接触，将反应壳体内依次分为阳电解室、再生反应室以及阴电解室；纯水罐置于反应壳体外并分别与阳电解室、再生反应室和阴电解室连通；离子交换膜为阴离子交换膜或阳离子交换膜。本发明能实现树脂自动再生，提高再生程度；且再生过程无需添加化学试剂，安全可靠。
The invention belongs to the technical field of material processing, and relates to a fully automatic ion exchange resin regeneration system and method. The regeneration system includes a reaction shell, an ion exchange membrane and a pure water tank; there are two ion exchange membranes, and the two ion exchange membranes are parallel and They are placed vertically on the inner bottom surface of the reaction shell, and the side walls of the two ion exchange membranes are in contact with the inner wall of the reaction shell. The ion exchange membrane is an anion exchange membrane or a cation exchange membrane. The invention can realize automatic regeneration of resin and improve the degree of regeneration; and the regeneration process does not need to add chemical reagents, and is safe and reliable.
Description
Technical Field
The invention belongs to the technical field of material treatment, and relates to a full-automatic ion exchange resin regeneration system and method, which are used for automatic regeneration of ion exchange resin in the processes of instrument detection and test analysis.
Background
The ion exchange resin is a common high molecular compound in the industrial water treatment industry, and has the main function of exchanging anions and cations in water to prepare pure water, but because of the influence of factors such as the self adsorption capacity, the water quality, the use environment and the like of the ion exchange resin, the ion exchange resin can gradually lose efficacy in the use process, so that the preparation yield of the pure water and the grade of the pure water are reduced, the lost resin needs to be regenerated and the activity is recovered, the regeneration of the ion exchange resin is generally carried out by adopting a chemical reagent, for example, the strong acid type cation resin is generally regenerated by using hydrochloric acid when losing efficacy; strong alkaline cationic resins are generally regenerated using sodium hydroxide.
However, ion exchange resins are also commonly used for detection of analyzers and daily test analysis in chemical laboratories, and under these situations, the dosage of ion exchange resins is not large, and workers generally collect scattered and failed resins and then manually complete the collection; however, the conventional manual regeneration method has the following disadvantages: firstly, the manual regeneration method has low regeneration degree, the regeneration degree of the general static regeneration method is only 70% -80%, the regeneration degree of the regenerated resin is low, and the reuse of the ion exchange resin can be influenced; secondly, the manual regeneration method needs to add strong acid and strong base chemical reagents, so that the risk that workers are injured by strong acid or strong base in the regeneration working process is increased, and potential safety hazards exist.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention provides an automatic regeneration system and method of ion exchange resin, which realize the automatic regeneration of the resin and improve the regeneration degree; and no chemical reagent is needed to be added in the regeneration process, so that the method is safe and reliable.
In order to achieve the purpose, the invention adopts the technical scheme that:
an automatic regeneration system of ion exchange resin comprises a reaction shell, an ion exchange membrane and a pure water tank; the two ion exchange membranes are parallelly and vertically arranged on the inner bottom surface of the reaction shell, the side walls of the two ion exchange membranes are in contact with the inner wall of the reaction shell, and the reaction shell is sequentially divided into an anode electrolysis chamber, a regeneration reaction chamber and an anion electrolysis chamber; the pure water tank is arranged outside the reaction shell and is respectively communicated with the positive electrolysis chamber, the regeneration reaction chamber and the negative electrolysis chamber.
Further, the ion exchange membrane is an anion exchange membrane or a cation exchange membrane.
Furthermore, the automatic ion exchange resin regeneration system also comprises electrolytic electrode plates which are respectively arranged in the positive electrolytic chamber and the negative electrolytic chamber.
Furthermore, the electrolytic electrode plates are all graphite electrodes.
Further, the automatic ion exchange resin regeneration system also comprises a power supply arranged outside the reaction shell; the power supply is respectively connected with the electrolytic electrode plate in the positive electrolytic chamber and the electrolytic electrode plate in the negative electrolytic chamber.
Furthermore, the automatic ion exchange resin regeneration system also comprises a wastewater pipeline arranged outside the reaction shell; the waste water pipeline is respectively communicated with the positive electrolysis chamber, the regeneration reaction chamber and the negative electrolysis chamber.
Further, the automatic ion exchange resin regeneration system also comprises a conductivity meter arranged between the regeneration reaction chamber and the waste water pipeline.
The regeneration method of the automatic ion exchange resin regeneration system comprises the following steps:
1) putting the ion exchange resin to be regenerated into a regeneration reaction chamber, and respectively introducing pure water into the regeneration reaction chamber, the positive electrolysis chamber and the negative electrolysis chamber through pure water tanks;
2) when the power supply is switched on, the electrolytic electrode plates in the positive electrolytic chamber and the electrolytic electrode plates in the negative electrolytic chamber both generate electrode reactions, hydrogen ions generated by electrolysis in the positive electrolytic chamber are transferred to the negative electrolytic chamber through the ion exchange membrane or hydroxide ions generated by the negative electrolytic chamber are transferred to the positive electrolytic chamber through the ion exchange membrane to do electrotransfer movement, and the ion exchange resin to be regenerated in the regeneration reaction chamber is regenerated; and simultaneously monitoring the conductivity value of the effluent of the regeneration reaction chamber by a conductivity meter until the conductivity value is less than 0.3 mu S/cm, and finishing the resin regeneration.
Further, in the step 2), when the ion exchange membrane is an anion exchange membrane, the ion exchange resin to be regenerated is an anion exchange resin; at the moment, hydroxide ions generated by the electrolysis of pure water in the negative electrolysis chamber do electromigration movement towards the positive electrolysis chamber through the ion exchange membrane, and the ion exchange resin to be regenerated in the regeneration reaction chamber is regenerated.
Further, in the step 2), when the ion exchange membrane is a cation exchange membrane, the ion exchange resin to be regenerated is a cation exchange resin; at the moment, hydrogen ions generated by pure water electrolysis in the positive electrolysis chamber penetrate through the ion exchange membrane to perform electromigration movement towards the negative electrolysis chamber, so as to regenerate the ion exchange resin to be regenerated in the regeneration reaction chamber.
The invention has the beneficial effects that:
1. the automatic regeneration system of the ion exchange resin provided by the invention can complete the regeneration process only by consuming a small amount of electric energy, and the regeneration degree of the resin can reach 99.9%.
2. The automatic regeneration system provided by the invention does not need to use acidic or alkaline chemical reagents for regeneration, avoids the contact of workers with dangerous chemicals, and is safe and environment-friendly.
3. The automatic regeneration method provided by the invention realizes automatic regeneration of the resin by utilizing electrodialysis and electromigration methods, can automatically complete regeneration work by introducing water and electrifying after the ion exchange resin to be regenerated is filled, is simple to operate, does not need manual intervention in the regeneration process, and has high automation degree.
Drawings
FIG. 1 is a schematic diagram of an automatic regeneration system provided by the present invention;
wherein:
1-pure water tank; 2-regeneration reaction chamber; 3-ion exchange membrane; 4-electrolytic electrode plate; 5-a positive electrolysis chamber; 6-negative electrolysis chamber; 7-a power supply; 8-conductivity meter; 9-waste water line.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings.
Examples
Referring to fig. 1, the present embodiment provides an automatic ion exchange resin regeneration system, which includes a reaction housing, an ion exchange membrane 3, and a pure water tank 1; the number of the ion exchange membranes 3 is two, the two ion exchange membranes 3 are parallelly and vertically placed on the inner bottom surface of the reaction shell, the side walls of the two ion exchange membranes 3 are in contact with the inner wall of the reaction shell, and the reaction shell is sequentially divided into an anode electrolysis chamber 5, a regeneration reaction chamber 2 and an anion electrolysis chamber 6; the pure water tank 1 is arranged outside the reaction shell and is respectively communicated with the positive electrolysis chamber 5, the regeneration reaction chamber 2 and the negative electrolysis chamber 6.
Specifically, the reaction shell is a sealed rectangular container, two ion exchange membranes 3 are vertically arranged on the bottom surface in the reaction shell, the two ion exchange membranes 3 are parallel, the reaction shell is divided into three chambers from left to right by the two ion exchange membranes 3, namely, a positive electrolysis chamber 5, a regeneration reaction chamber 2 and a negative electrolysis chamber 6, the positive electrolysis chamber 5 is communicated with the regeneration reaction chamber 2 through the ion exchange membranes 3, and the regeneration reaction chamber 2 is communicated with the negative electrolysis chamber 6 through the ion exchange membranes 3.
In this embodiment, the pure water tank 1 is filled with pure water, and for pure water, the conductivity should be ensured to be less than 0.3. mu.S/cm for the best regeneration efficiency. Pure water is added to the regeneration reaction chamber 2, the positive electrolysis chamber 5 and the negative electrolysis chamber 6, mainly using pure water as an electrolyte and also providing a carrier for ion migration.
In the embodiment, a regeneration water inlet (positioned at the top of the chamber) and a regeneration water outlet (positioned at the bottom of the chamber) are respectively arranged on the regeneration reaction chamber 2, an anode water inlet (positioned at the top of the chamber) and an anode water outlet (positioned at the bottom of the chamber) are respectively arranged on the anode electrolysis chamber 5, a cathode water inlet (positioned at the top of the chamber) and a cathode water outlet (positioned at the bottom of the chamber) are respectively arranged on the cathode electrolysis chamber 6, the pure water tank 1 is respectively communicated with the regeneration water inlet, the anode water inlet and the cathode water inlet, and pure water is introduced into the three chambers; the waste water pipeline 9 is respectively communicated with the regeneration water outlet, the anode water outlet and the cathode water outlet, and discharges the waste liquid generated after regeneration.
In this embodiment, the ion exchange membrane 3 is an anion exchange membrane. When the ion exchange membrane 3 is implemented, the function requirement can be realized by selecting a membrane commonly used by EDI equipment. Since the ion exchange membrane 3 is a selectively permeable membrane that allows only ions to permeate therethrough but does not allow water to permeate therethrough, the ion exchange membrane 3 functions as two: firstly, the hydrogen ions or hydroxyl ions generated by the water electrolysis are conveyed to the ion exchange resin under the action of the electric field, and secondly, the cations or anions regenerated by the hydrogen ions or hydroxyl ions on the ion exchange resin are conveyed to the anode electrolytic chamber 5 or the cathode electrolytic chamber 6 and then discharged under the action of the electric field.
The automatic regeneration system of the ion exchange resin provided by the embodiment also comprises an electrolytic electrode plate 4 respectively arranged in the anode electrolytic chamber 5 and the cathode electrolytic chamber 6. The electrolytic electrode plates 4 are all graphite electrodes. Mainly in order to take into account conductivity, corrosion protection and cost issues.
The automatic ion exchange resin regeneration system provided by the embodiment further comprises a power supply 7; the power source 7 is connected to the electrolytic electrode plate 4 in the positive electrolytic cell 5 and the electrolytic electrode plate 4 in the negative electrolytic cell 6, respectively. The power supply 7 should be a constant current power supply with 24V DC voltage and adjustable current, and the current adjustable range is 0-1A. The power supply 7 has two roles: firstly, constant current is provided for an electrolysis electrode to ensure electrode reaction and generate hydrogen ions or hydroxyl ions required by regeneration on the electrolysis electrode, and secondly, an electric field is provided for ions in a flow path to do ion migration movement.
The automatic ion exchange resin regeneration system provided by the embodiment further comprises a conductivity meter 8 arranged between the regeneration water outlet and the wastewater pipeline 9. The conductivity meter 8 should be an online conductivity meter, and in order to accurately measure the conductivity of pure water, a 0.01-grade electrode needs to be used together. And a conductivity meter 8 is arranged outside a regeneration water outlet of the regeneration reaction chamber 2, the conductivity of the effluent quality is mainly monitored, whether the regeneration work is finished or not is judged according to the conductivity, and the regeneration resin work can be considered to be finished when the effluent conductivity is less than 0.3 mu S/cm.
In this embodiment, the ion exchange membrane 3 is an anion exchange membrane, and the ion exchange resin to be regenerated is an anion exchange resin.
The regeneration method of the automatic regeneration system of ion exchange resin provided by the embodiment comprises the following steps:
1) the ion exchange resin to be regenerated is placed in a regeneration reaction chamber 2, and pure water is respectively introduced into the regeneration reaction chamber 2, the positive electrolysis chamber 5 and the negative electrolysis chamber 6 from a pure water tank 1;
2) the power supply 7 is switched on, and the electrolytic electrode plate 4 in the positive electrolytic chamber 5 and the electrolytic electrode plate 4 in the negative electrolytic chamber 6 generate electrode reactions; hydroxide ions generated by the electrolysis of pure water in the anion electrolysis chamber 6 do electromigration movement towards the direction of the cation electrolysis chamber 5 through the ion exchange membrane 3 to regenerate the ion exchange resin to be regenerated in the regeneration reaction chamber 2; meanwhile, the conductivity value of the effluent of the regeneration reaction chamber 2 is monitored by a conductivity meter 8 until the conductivity value is less than 0.3 mu S/cm, and the resin regeneration is completed.
In the step, the anode water outlet at the bottom of the anode electrolysis chamber 5 and the cathode water outlet at the bottom of the cathode electrolysis chamber 6 discharge waste liquid together in the waste water pipeline 9, and after the conductivity value of the water from the regeneration water outlet of the regeneration reaction chamber 2 is measured by the conductivity meter 8, the water with the conductivity value less than 0.3 mu S/cm also flows in the waste water pipeline 9 to be discharged together.
Example 2
Unlike example 1, in this example, the ion exchange membrane 3 is a cation exchange membrane, and a membrane commonly used for EDI devices is specifically selected. The ion exchange resin to be regenerated is a cation exchange resin.
The regeneration method of the automatic regeneration system of ion exchange resin provided by the embodiment comprises the following steps:
1) putting the ion exchange resin to be regenerated into the regeneration reaction chamber 2, and respectively introducing pure water into the regeneration reaction chamber 2, the positive electrolysis chamber 5 and the negative electrolysis chamber 6;
2) the power supply 7 is switched on, and the electrolytic electrode plate 4 in the positive electrolytic chamber 5 and the electrolytic electrode plate 4 in the negative electrolytic chamber 6 generate electrode reactions; hydrogen ions generated by pure water electrolysis in the positive electrolysis chamber 5 penetrate through the ion exchange membrane 3 to perform electromigration movement towards the negative electrolysis chamber 6, and the ion exchange resin to be regenerated in the regeneration reaction chamber 2 is regenerated; meanwhile, the conductivity value of the effluent of the regeneration reaction chamber 2 is monitored by a conductivity meter 8 until the conductivity value is less than 0.3 mu S/cm, and the resin regeneration is completed.
In the step, the anode water outlet at the bottom of the anode electrolysis chamber 5 and the cathode water outlet at the bottom of the cathode electrolysis chamber 6 discharge waste liquid together in the waste water pipeline 9, and after the conductivity value of the water from the regeneration water outlet of the regeneration reaction chamber 2 is measured by the conductivity meter 8, the water with the conductivity value less than 0.3 mu S/cm also flows in the waste water pipeline 9 to be discharged together.
In conclusion, the automatic regeneration system and method for the ion exchange resin provided by the invention are characterized in that the ineffective ion exchange resin is filled into the closed cavity, hydrogen ions or hydroxyl radicals are generated through electrolytic water reaction, and then the ions are subjected to electromigration under the action of the electric field by using the ion exchange membrane, so that the ions on the ineffective resin are replaced, the aim of regenerating the resin is fulfilled, the operation is simple, the regeneration degree can reach 99.9%, the regeneration effect is good, the reuse of the resin is facilitated, no regeneration reagent is required to be added, and the system and method are safe and environment-friendly.
Claims (10)
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| CN202210466537.1A CN114798003A (en) | 2022-04-29 | 2022-04-29 | Automatic ion exchange resin regeneration system and method |
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| CN202210466537.1A CN114798003A (en) | 2022-04-29 | 2022-04-29 | Automatic ion exchange resin regeneration system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115774046A (en) * | 2022-12-09 | 2023-03-10 | 华能景泰热电有限公司 | Electric ion migration type trace chloride ion measuring system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115774046A (en) * | 2022-12-09 | 2023-03-10 | 华能景泰热电有限公司 | Electric ion migration type trace chloride ion measuring system and method |
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Application publication date: 20220729 |