Electric cation removal device for online anion trace monitoring

Abstract

The utility model discloses an electrodeionization device for on-line anion trace monitoring, which is characterized in that a cation exchange membrane is arranged between a fresh water chamber and a concentrated water chamber, cation exchange resin is filled in the fresh water chamber and the concentrated water chamber, the fresh water chamber is used for removing cations in sample water, and the concentrated water chamber is used for removing the cation in the sample water. Then, outputting to the anion trace monitoring module for anion trace monitoring; the monitored sample water is output to a concentrated water chamber, water molecules are electrolyzed into hydrogen ions and hydroxyl ions by the concentrated water chamber, cation exchange resin is continuously regenerated by the hydrogen ions, and the hydroxyl ions are discharged after being combined with cations in the sample water; and the control module controls the power supply module to supply power to the electrodeionization module. According to the technical scheme of the utility model, the problems of frequent replacement and regeneration of cation exchange resin and waste liquid in trace monitoring of water sample anions are solved, sample water for removing cations can be continuously provided for monitoring the content of anions, and the use process and maintenance are simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of measuring device technology, and in particular to an electrostatic cation removal device for online anion trace monitoring. Background Technology

[0002] Online anion trace monitoring of boiler water systems in power, steel, and chemical industries involves passing the water sample through a hydrogen-form cation exchange resin to remove trace amounts of ions (such as Na+). + NH 4+ Cation removal, etc., only targets anions (such as Cl-) remaining in the sample water. - SO4 2- PO4 3- The conductivity is monitored by measuring the content of anions (such as cations), while hydrogen ions and hydroxide ions can be neutralized and consumed, and are not reflected in the conductivity. Therefore, the conductivity excluding cations represents the water purity or anion content of the boiler steam system.

[0003] Currently, the monitoring of conductivity primarily involves passing the sample water through a cation exchange resin column to remove cations before monitoring. However, after a period of operation, the resin in the cation exchange resin column becomes ineffective, requiring periodic replacement and regeneration. This regeneration process generates a large amount of acidic waste liquid, and is cumbersome and labor-intensive. The regenerated resin must be rinsed with plenty of pure water before reuse; otherwise, residual acidic waste liquid will cause the measured conductivity to be too high, affecting normal use. Utility Model Content

[0004] To address the aforementioned problems, this invention provides an electro-cation removal device for online anion trace monitoring. Through the structural design of the desalination chamber and concentrate chamber of the electro-cation removal module, cations are removed from the sample water in the desalination chamber, and the output is used for anion trace monitoring. The sample water is then sent to the concentrate chamber for electrolysis to obtain hydrogen ions, which continuously regenerate the cation exchange resin. Hydroxide ions combine with cations in the sample water and are then discharged. This solves the problem of frequent replacement and regeneration of cation exchange resin in water sample anion trace monitoring, and also avoids the generation of acid washing waste liquid during cation exchange resin regeneration. It can continuously provide cation-removed sample water for anion content monitoring, and the process is simple and convenient to use and maintain.

[0005] To achieve the above objectives, this utility model provides an electro-cation removal device for online anion trace monitoring, comprising: an electro-cation removal module, an anion trace monitoring module, a control module, and a power supply module;

[0006] The electro-cation removal module includes a desalination chamber and a concentrate chamber. A cation exchange membrane is provided between the desalination chamber and the concentrate chamber. Both the desalination chamber and the concentrate chamber are filled with cation exchange resin. The desalination chamber is used to remove cations from the sample water. The sample water after cation removal is output to the anion trace monitoring module for anion trace monitoring.

[0007] After anion trace monitoring, the sample water is output to the concentrate chamber, which is used to electrolyze water molecules into hydrogen ions and hydroxide ions. The hydrogen ions continuously regenerate the cation exchange resin, and the hydroxide ions combine with the cations in the sample water and are then discharged.

[0008] The power module supplies power to the electro-cation removal module, and the control module controls the power supply switch of the power module to the electro-cation removal module.

[0009] In the above technical solution, preferably, the electro-cation removal module is composed of a desalination chamber partition, a concentrate chamber partition, the cation exchange resin, the cation exchange membrane, and an electrode plate;

[0010] The freshwater chamber partitions at both ends form the chamber of the freshwater chamber, the cation exchange membrane surrounds the chamber of the freshwater chamber, and the chamber is filled with the cation exchange resin;

[0011] The cation exchange membranes on both sides of the desalination chamber, together with the partition of the concentrate chamber and the electrode plate, form the chamber of the concentrate chamber, which is filled with the cation exchange resin.

[0012] The two concentrate chambers are located on both sides of the desalination chamber, and the two electrode plates are located on both sides of the electro-cation removal module. The two electrode plates are respectively connected to the power supply module as the anode and cathode.

[0013] In the above technical solution, preferably, the electro-cation removal device for online anion trace monitoring further includes a flow meter, which is disposed between the output end of the anion trace monitoring module and the concentrate chamber. The flow meter is connected to the control module and is used to detect the sample water flow rate data output to the concentrate chamber and can output the detection data to the control module.

[0014] In the above technical solution, preferably, the anion trace monitoring module includes anion trace monitoring flow cell and conductivity sensor, the conductivity sensor is disposed in the anion trace monitoring flow cell, and the conductivity sensor is connected to the control module;

[0015] The sample water after cation removal is input into the anion trace monitoring flow cell and output to the concentrate chamber. The conductivity sensor is used to monitor the trace amount of anions in the sample water and can transmit the monitoring data to the control module.

[0016] In the above technical solution, preferably, the electro-cation removal device for online anion trace monitoring further includes a temperature sensor and a pressure sensor. The temperature sensor and the pressure sensor are disposed at the sample water input end of the fresh water chamber. The temperature sensor and the pressure sensor are respectively connected to the control module. The temperature sensor and the pressure sensor are used to detect the temperature and pressure of the input sample water and can transmit the detection data to the control module.

[0017] In the above technical solution, preferably, the electro-cation removal device for online anion trace monitoring further includes a display screen, which is connected to the control module and the power module respectively. The display screen can display the temperature and pressure data of the input sample water received by the control module, the sample water flow data detected by the flow meter, and the anion trace monitoring data. The power module supplies power to the display screen.

[0018] In the above technical solution, preferably, the electro-cation removal device for online anion trace monitoring further includes an automatic pressure relief valve, which is located at the sample water input end of the fresh water chamber. The automatic pressure relief valve can automatically discharge excess sample liquid when the input sample water pressure is greater than the preset pressure that the electro-cation removal module can withstand.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the structural design of the desalination chamber and the concentrate chamber of the electro-cation removal module, after removing cations from the sample water in the desalination chamber, the output is used for anion trace monitoring. Then, it is sent to the concentrate chamber for electrolysis to obtain hydrogen ions, and the cation exchange resin therein is continuously regenerated. After hydroxide ions combine with cations in the sample water, they are discharged. This solves the problem of frequent replacement and regeneration of cation exchange resin in water sample anion trace monitoring, and also avoids the generation of acid washing waste liquid during the cation exchange resin regeneration process. It can continuously provide cation-removed sample water for anion content monitoring, and the process of use and maintenance is simple and convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall principle of an electro-cation removal device for online anion trace monitoring disclosed in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of an electro-cation removal module disclosed in one embodiment of the present invention.

[0022] The correspondence between the components and the reference numerals in the diagram is as follows:

[0023] 1. Electrostatic cation removal module; 11. Desalinated water chamber; 12. Concentrated water chamber; 13. Cation exchange membrane; 14. Cation exchange resin; 15. Desalinated water chamber partition; 16. Concentrated water chamber partition; 17. Electrode plate; 2. Anion trace monitoring module; 21. Anion trace monitoring flow cell; 22. Conductivity sensor; 3. Control module; 4. Power supply module; 5. Flow meter; 6. Temperature sensor; 7. Pressure sensor; 8. Display screen; 9. Automatic pressure relief valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings:

[0026] like Figure 1 As shown, the electro-cation removal device for online anion trace monitoring provided by this utility model includes: an electro-cation removal module 1, an anion trace monitoring module 2, a control module 3, and a power supply module 4;

[0027] The electro-cation removal module 1 includes a fresh water chamber 11 and a concentrated water chamber 12. A cation exchange membrane 13 is provided between the fresh water chamber 11 and the concentrated water chamber 12. Both the fresh water chamber 11 and the concentrated water chamber 12 are filled with cation exchange resin 14. The fresh water chamber 11 is used to remove cations from the sample water. The sample water after cation removal is output to the anion trace monitoring module 2 for anion trace monitoring.

[0028] After anion trace monitoring, the sample water is output to the concentrate chamber 12. The concentrate chamber 12 is used to electrolyze water molecules into hydrogen ions and hydroxide ions. The hydrogen ions continuously regenerate the cation exchange resin 14, and the hydroxide ions combine with the cations in the sample water and are then discharged.

[0029] Power module 4 supplies power to electro-cation removal module 1, and control module 3 controls the power supply switch of power module 4 to electro-cation removal module 1.

[0030] In this embodiment, through the structural design of the desalination chamber 11 and the concentrate chamber 12 of the cation removal module 1, the desalination chamber 11 removes cations from the sample water and outputs it for anion trace monitoring. Then, it is sent to the concentrate chamber 12 for electrolysis to obtain hydrogen ions, which continuously regenerate the cation exchange resin 14. Hydrogen ions combine with cations in the sample water and are discharged. This solves the problem of frequent replacement and regeneration of the cation exchange resin 14 in water sample anion trace monitoring, and also avoids the generation of acid washing waste liquid during the regeneration of the cation exchange resin 14. It can continuously provide cation-removed sample water for anion content monitoring, and the process of use and maintenance is simple and convenient.

[0031] Specifically, during the implementation process, the water sample to be tested is connected through a connector and enters the desalination chamber 11 inside the electro-cation removal module 1, where the electro-cation removal module 1 removes cations from the water sample. The water sample after cation removal enters the anion trace monitoring module 2 for anion trace monitoring. The monitored water sample then enters the concentrate chambers 12 on both sides. The control module 3 supplies power to the electrode plates of the electro-cation removal module 1, electrolyzing the water molecules in the concentrate chamber 12 into hydrogen ions and hydroxide ions. The hydrogen ions can continuously regenerate the cation exchange resin 14 of the electro-cation removal module 1, while the hydroxide ions combine with the cations in the water sample and are then discharged.

[0032] like Figure 2 As shown, in the above embodiment, preferably, the electro-cation removal module 1 is composed of a fresh water chamber partition 15, a concentrated water chamber partition 16, a cation exchange resin 14, a cation exchange membrane 13 and an electrode plate 17.

[0033] The freshwater chamber partitions 15 at both ends form the chamber of the freshwater chamber 11. The cation exchange membrane 13 surrounds the chamber of the freshwater chamber 11, and the chamber is filled with cation exchange resin 14.

[0034] The cation exchange membranes 13 on both sides of the desalination chamber 11, together with the partition plate 16 of the concentrate chamber and the electrode plate 17, form the chamber of the concentrate chamber 12, which is filled with cation exchange resin 14.

[0035] Two concentrate chambers 12 are distributed on both sides of the desalination chamber 11, and two electrode plates 17 are distributed on both sides of the electro-cation removal module 1. The two electrode plates 17 are respectively connected to the power supply module 4 as the anode and cathode.

[0036] Specifically, during the implementation process, the sample water first passes through the fresh water chamber 11 for cation removal, and after anion trace monitoring, it is then transported to the concentrated water chambers 12 on both sides for water electrolysis. The hydrogen ions obtained from electrolysis can continuously regenerate the cation exchange resin 14 of the cation removal module 1. Hydroxide ions combine with cations in the water sample and are then discharged.

[0037] Based on the structure of the electro-cation removal module 1, its working principle includes the following steps:

[0038] Step 1: Sample water enters freshwater chamber 11

[0039] The water sample to be treated (raw water) first enters the fresh water chamber 11 and comes into contact with the cation exchange resin 14 therein.

[0040] Cation exchange process:

[0041] The active groups on the resin adsorb cations (such as Ca) in water through ion exchange. 2+ Mg 2+ ), releasing H + When it enters the water, this process removes cations from the water, resulting in preliminarily purified fresh water.

[0042] Step 2: Electric field-driven ion migration

[0043] Electrode plate 17 is energized: Control module 3 controls power supply module 4 to energize cation removal module 1, and a DC electric field is formed between electrode plate 17 (anode and cathode).

[0044] Directed migration of cations:

[0045] Cations (such as Ca) adsorbed by resin in freshwater chamber 11 2+ Under the influence of an electric field, ions migrate through the cation exchange membrane 13 to the adjacent concentrate chambers 12 on both sides. The cation exchange membrane 13 only allows cations to pass through, blocking anions (such as Cl-, SO42-). 2- The free diffusion of water ensures that the migration direction is controllable.

[0046] Step 3: Electrolysis of water and regeneration of resin in concentrate chamber 12

[0047] Electrolysis reaction in concentrate chamber 12:

[0048] When energized, water molecules in the concentrate chamber 12 are electrolyzed on the electrode surface, and a reduction reaction occurs at the cathode to generate OH-. - And hydrogen. An oxidation reaction occurs at the anode, producing H₂. + And oxygen.

[0049] H produced in concentrate chamber 12 + (From the anodic reaction) migrates in the reverse direction through the cation exchange membrane 13 to the freshwater chamber 11, replacing the Ca adsorbed on the resin. 2+ Mg 2+ Isocations restore the resin to H+. + This type enables continuous regeneration.

[0050] Step 4: Concentrate discharge and system circulation

[0051] Concentrate chamber 12 ion enrichment:

[0052] Cations (such as Ca) that migrate to concentrate chamber 12 2+ It combines with OH- to form insoluble hydroxides (such as Ca(OH)2), or with Cl-, SO42-, etc. 2- Anions combine to form a high-concentration salt solution.

[0053] The concentrated cation-rich water is discharged from the system through the drain outlet to avoid scaling or clogging.

[0054] Freshwater (H2O) after cation removal and resin regeneration + (The concentration increases, but the cation content is extremely low) and flows out from the outlet of freshwater chamber 11, entering subsequent treatment or for direct use.

[0055] In the above embodiments, preferably, the electro-cation removal device for online anion trace monitoring further includes a flow meter, which is disposed between the output end of the anion trace monitoring module 2 and the concentrate chamber 12. The flow meter is connected to the control module 3 and is used to detect the sample water flow data output to the concentrate chamber 12 and can output the detection data to the control module 3.

[0056] During implementation, the control module 3 reads and processes the flow meter signal. When the sample water flow rate does not reach the set value of the required sample water flow rate of the module, the control module 3 cuts off the power supply of the power module 4 to the electro-cation removal module 1. Conversely, when the sample water flow rate does not reach or exceeds the set value of the required sample water flow rate of the module, the control module 3 turns on the power supply of the power module 4 to the electro-cation removal module 1.

[0057] In the above embodiment, preferably, the anion trace monitoring module 2 includes anion trace monitoring flow cell 21 and conductivity sensor 22. The conductivity sensor 22 is disposed in the anion trace monitoring flow cell 21 and is connected to the control module 3.

[0058] The sample water after cation removal is input into the anion trace monitoring flow cell 21 and output to the concentrate chamber 12. The conductivity sensor 22 is used to monitor the anion trace in the sample water and can transmit the monitoring data to the control module 3.

[0059] In the above embodiments, preferably, the electro-cation removal device for online anion trace monitoring further includes a temperature sensor 6 and a pressure sensor 7. The temperature sensor 6 and the pressure sensor 7 are disposed at the sample water input end of the fresh water chamber 11. The temperature sensor 6 and the pressure sensor 7 are respectively connected to the control module 3. The temperature sensor 6 and the pressure sensor 7 are used to detect the temperature and pressure of the input sample water, and can transmit the detection data to the control module 3.

[0060] In the above embodiments, preferably, the electro-cation removal device for online anion trace monitoring further includes a display screen 8, which is connected to the control module 3 and the power module 4 respectively. The display screen 8 can display the temperature and pressure data of the input sample water received by the control module 3, the sample water flow data detected by the flow meter, and the anion trace monitoring data. The power module 4 supplies power to the display screen 8.

[0061] During implementation, the control module 3 reads and processes the signal from the temperature sensor 6 and sends it to the display screen 8 to directly reflect the temperature of the water sample to be tested. When the temperature of the water sample to be tested is abnormal, the display screen 8 will display an alarm signal.

[0062] The control module 3 reads and processes the signal from the pressure sensor 7 and sends it to the display screen 8 to directly reflect the pressure of the water sample to be tested. When the pressure of the water sample to be tested is abnormal, the display screen 8 will display an alarm signal.

[0063] The control module 3 reads and processes the flow meter signal and sends it to the display screen 8.

[0064] In the above embodiments, preferably, the electro-cation removal device for online anion trace monitoring further includes an automatic pressure relief valve 9. The automatic pressure relief valve 9 is located at the sample water input end of the fresh water chamber 11. The automatic pressure relief valve 9 can automatically discharge excess sample liquid when the input sample water pressure is greater than the preset pressure that the electro-cation removal module 1 can withstand.

[0065] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electro-decanting device for online anion trace monitoring, characterized in that, The application relates to an electric cation removal module, an anion trace monitoring module, a control module and a power module. The electric cation removal module comprises a fresh water chamber and a concentrated water chamber, a cation exchange membrane is arranged between the fresh water chamber and the concentrated water chamber, cation exchange resin is filled in the fresh water chamber and the concentrated water chamber, the fresh water chamber is used for removing cations in sample water, and the sample water after the cations are removed is output to the anion trace monitoring module for anion trace monitoring. The sample water after the anion trace monitoring is output to the concentrated water chamber, the concentrated water chamber is used for electrolyzing water molecules into hydrogen ions and hydroxyl ions, the hydrogen ions continuously regenerate the cation exchange resin, and the hydroxyl ions are combined with cations in sample water and then discharged. The power module supplies power for the electric cation removal module, and the control module controls the power supply switch of the electric cation removal module. The electric cation removal module is composed of fresh water chamber partitions, concentrated water chamber partitions, the cation exchange resin, the cation exchange membrane and electrode plates.

2. The electric deprotonation device for online anion trace monitoring according to claim 1, characterized in that, The fresh water chamber partitions at two ends form the chamber of the fresh water chamber, the cation exchange membrane wraps the chamber of the fresh water chamber, and the chamber is filled with the cation exchange resin. The cation exchange membranes on the two sides of the fresh water chamber form the chamber of the concentrated water chamber together with the concentrated water chamber partitions and the electrode plates respectively, and the chamber is filled with the cation exchange resin. Two concentrated water chambers are arranged on the two sides of the fresh water chamber, two electrode plates are arranged on the two sides of the electric cation removal module, and the two electrode plates are connected with the power module as an anode and a cathode respectively. A flow meter is arranged between the output end of the anion trace monitoring module and the concentrated water chamber, the flow meter is connected with the control module, the flow meter is used for detecting the sample water flow data output to the concentrated water chamber, and the flow meter can output the detection data to the control module.

3. The electric deprotonation device for online anion trace monitoring according to claim 1 or 2, characterized in that, The anion trace monitoring module comprises an anion trace monitoring flow cell and a conductivity sensor, the conductivity sensor is arranged in the anion trace monitoring flow cell, and the conductivity sensor is connected with the control module.

4. The electric deprotonation device for online anion trace monitoring according to claim 3, characterized in that, The sample water after the cations are removed is input to the anion trace monitoring flow cell and then output to the concentrated water chamber, the conductivity sensor is used for monitoring the anion trace of the sample water, and the conductivity sensor can transmit the monitoring data to the control module. A temperature sensor and a pressure sensor are arranged at the sample water input end of the fresh water chamber, the temperature sensor and the pressure sensor are connected with the control module respectively, and the temperature sensor and the pressure sensor are respectively used for detecting the temperature and pressure of the input sample water and can transmit the detection data to the control module.

5. The electric deprotonation device for online anion trace monitoring according to claim 4, characterized in that, A display screen is connected with the control module and the power module respectively, the display screen can display the temperature and pressure data of the input sample water received by the control module, the sample water flow data detected by the flow meter and the anion trace monitoring data, and the power module supplies power for the display screen.

6. The electric deprotonation device for online anion trace monitoring according to claim 5, characterized in that, ​ 7. The electric deprotonation device for online anion trace monitoring according to claim 6, characterized in that, Further comprising an automatic pressure relief valve arranged at the sample water input end of the fresh water chamber, which is capable of automatically discharging excess sample liquid when the input sample water pressure is greater than a preset pressure that the electric de-cation module can withstand.

Images