PEM electrolytic bath conductivity control device
By designing a conductivity control device for PEM electrolyzers, the conductivity of deionized water is monitored and adjusted using a water tank and circulation system. This solves the problem of increased deionized water conductivity affecting the operation of the electrolyzer, and achieves conductivity control and deionized water saving.
Patent Information
- Application Number
- CN202520168602.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-24
AI Technical Summary
During the proton exchange membrane electrolysis hydrogen production process, the increased conductivity of deionized water affects the normal operation of the PEM electrolyzer and leads to an increase in the amount of deionized water used.
Design a conductivity control device for a PEM electrolyzer. The device monitors and adjusts the system through a circulation system consisting of a water tank, a circulating pump, a switching valve, a check valve, a filter, and a deionizer. The conductivity is monitored by a conductivity meter, and the conductivity is reduced by the deionizer when necessary, thereby achieving conductivity control.
Effectively control the conductivity during the operation of the PEM electrolyzer, save on deionized water consumption, and ensure the normal operation and economy of the electrolyzer.
Smart Images
Figure CN223688477U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the PEM electrolytic cell test field, concretely relates to a PEM electrolytic cell conductivity control device. BACKGROUND
[0002] The product of electrolytic water hydrogen production is hydrogen and oxygen, and there is no carbon emission, so it is green and environmental protection. Proton exchange membrane electrolytic water hydrogen production (PEM) uses proton exchange membrane instead of diaphragm and electrolyte in alkaline hydrogen production, and uses pure water to electrolyze to generate hydrogen and oxygen. PEM hydrogen production speed is fast, and proton exchange membrane effectively isolates the two sides of gas, avoids alkaline pollution, and produces high-purity hydrogen. PEM hydrogen production has the advantages of light weight, large current density, high hydrogen purity, fast start, good response, adaptability to renewable energy fluctuation, etc., and is rapidly developed. In the operation process of proton exchange membrane electrolysis hydrogen production, hydrogen and oxygen are generated in the anode and cathode, and the PEM electrolytic cell needs to be supplemented with deionized water. In the deionized water circulation process, the conductivity of deionized water will increase continuously, and after a long time, it will affect the operation of PEM. SUMMARY
[0003] In order to overcome the defects of the prior art, the utility model provides a PEM electrolytic cell conductivity control device, which controls the conductivity of PEM circulating water during the operation of PEM hydrogen electrolytic cell, ensures the normal operation of PEM, and saves the amount of deionized water.
[0004] The above object of the utility model is realized by the following technical scheme: a PEM electrolytic cell conductivity control device, comprising: a water tank, a circulating pump, a PEM electrolytic cell, and a switching valve connected in sequence to form a circulating loop, and a circulating branch is further arranged between the water tank and the switching valve, and the circulating branch is sequentially provided with a water tank, a valve, a check valve, a filter, a deionizer, a pressure gauge and a switching valve.
[0005] Further, the water tank is further provided with a water supplement port.
[0006] Further, the water tank is further provided with a conductivity meter.
[0007] Further, the PEM electrolytic cell is further provided with a hydrogen discharge port.
[0008] The conductivity control device of the PEM electrolytic cell operates as follows: deionized water enters the water tank through the water supplementing opening, and is supplied to the PEM electrolytic cell by the circulating pump, the PEM electrolytic cell works, hydrogen gas is discharged through the hydrogen gas discharge opening, the deionized water and oxygen gas enter the water tank through the switching valve, the oxygen gas is discharged through the oxygen gas discharge opening, the conductivity of the circulating water is monitored by the conductivity meter on the water tank, when the conductivity exceeds the index, the switching valve acts, the deionized water and oxygen gas from the PEM electrolytic cell enter the deionizer to reduce the conductivity of the water after the pressure gauge, and then return to the water tank through the filter check valve and the valve, the oxygen gas is discharged through the oxygen gas discharge opening, and the qualified deionized water in the water tank is supplied to the PEM electrolytic cell by the circulating pump to complete a cycle.
[0009] The beneficial effects of the utility model compared with the prior art are:
[0010] 1) The conductivity of the circulating water in the operation process of the PEM electrolytic cell can be controlled.
[0011] 2) The utility model skillfully utilizes conventional devices to avoid the influence of the conductivity increase in the operation process of the PEM electrolytic cell on the operation of the electrolytic cell, saves deionized water, and has good economy.
[0012] 3) The utility model solves the problem of the conductivity increase of the circulating water in the operation process of the PEM electrolytic cell, which affects the operation of the PEM electrolytic cell. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model will be further described below in combination with the drawings and specific embodiments
[0014] Figure 1 It is a structure schematic view of the conductivity control device of the PEM electrolytic cell.
[0015] In the figure, 1. water tank; 2. conductivity meter; 3. circulating pump; 4. switching valve; 5. pressure gauge; 6. deionizer; 7. filter; 8. check valve; 9. valve; 10. water supplementing opening; 11. oxygen gas discharge opening; 12. PEM electrolytic cell; 13. hydrogen gas discharge opening. DETAILED DESCRIPTION
[0016] The utility model will be further described below in combination with the drawings and specific embodiments
[0017] Example 1
[0018] The structure of the utility model will be further described below with reference to the drawings.
[0019] The conductivity control device of the PEM electrolyzer comprises a water tank 1, a circulating pump 3, a PEM electrolyzer 12, a switching valve 4, and a circulating branch between the water tank 1 and the switching valve 4, wherein the water tank 1, the circulating pump 3, the PEM electrolyzer 12, and the switching valve 4 are sequentially connected into a circulating loop, and the circulating branch comprises the water tank 1, a valve 9, a check valve 8, a filter 7, a deionizer 6, a pressure gauge 5, and the switching valve 4 in sequence, the water tank 1 is further provided with a water supplement port 10 and a conductivity meter 2, and the PEM electrolyzer 12 is further provided with a hydrogen discharge port 13.
[0020] The operation method of the device is as follows: deionized water is supplemented into the water tank 1 through the water supplement port 10, the circulating pump 3 supplies water to the PEM electrolyzer 12, the PEM electrolyzer 12 works to generate hydrogen which is discharged through the hydrogen discharge port 13, the deionized water and oxygen enter the water tank 1 through the switching valve 4, the oxygen is discharged through an oxygen discharge port 11, the conductivity meter 2 on the water tank monitors the conductivity of the circulating water, when the conductivity exceeds the index, the switching valve 4 acts, the deionized water and oxygen from the PEM electrolyzer 12 enter the deionizer 6 after passing through the pressure gauge 5 to reduce the conductivity of the water, and then the deionized water and oxygen return to the water tank 1 through the filter 7, the check valve 8, and the valve 9, the oxygen is discharged through the oxygen discharge port 11, the qualified deionized water in the water tank 1 is supplied to the PEM electrolyzer 12 through the circulating pump 3 to complete a cycle.
[0021] The above-mentioned embodiments are only preferred embodiments of the present application, and not all the embodiments that can be implemented by the present application. Any obvious changes made by those skilled in the art without departing from the principles and spirits of the present application should be considered to be included in the protection scope of the claims of the present application.
Claims
1. A PEM electrolyser conductivity control device, characterised in that, It comprises: a water tank (1), a circulating pump (3), a PEM electrolytic cell (12), a switching valve (4) connected into a circulating loop in sequence, and a circulating branch between the water tank (1) and the switching valve (4), wherein the circulating branch comprises the water tank (1), a valve (9), a check valve (8), a filter (7), a deionizer (6), a pressure gauge (5) and the switching valve (4) in sequence.
2. The PEM cell conductivity control apparatus of claim 1, wherein, The water tank (1) is further provided with a water supplementing port (10).
3. The PEM cell conductivity control apparatus of claim 1, wherein, The water tank (1) is further provided with an electric conductivity meter (2).
4. The PEM cell conductivity control apparatus of claim 1, wherein, The PEM electrolytic cell (12) is further provided with a hydrogen discharge port (13).