An electrochemical testing device for anion exchange membrane in water electrolysis

Abstract

This utility model relates to an electrochemical testing device for anion exchange membranes in water electrolysis, comprising a device body, which includes a structural organization, a reaction device, and detection equipment. A gas flow rate detection device uses gas to drive a fan to rotate, and calculates data such as gas pressure and flow rate using the micro-current generated by the fan rotation. A liquid flow rate detection device uses a conductive liquid to cut magnetic field lines, and the resulting micro-current is detected by a micro-current meter and used to calculate data such as hydraulic pressure and flow rate. When hydroxide ions pass through the anion exchange membrane, a micro-current is also generated on the surface of the anion exchange membrane and transmitted to a liquid crystal display screen. By introducing an alkaline solution into the inlet, the alkaline solution is oxidized at the anode flow channel plate connected to the positive electrode to produce oxygen and hydroxide ions. The hydroxide ions are then reduced at the cathode flow channel plate connected to the negative electrode through the anion exchange membrane to produce water and hydrogen gas.

Description

Technical Field

[0001] This utility model relates to a testing device, specifically an electrochemical testing device for anion exchange membrane electrolysis. Background Technology

[0002] Anion exchange membrane water electrolysis reactors involve a variety of complex physicochemical processes. During operation, water is electrolyzed at the cathode to produce hydroxide ions and hydrogen gas. The hydrogen gas is carried out of the reactor by the alkaline solution. Simultaneously, hydroxide ions pass through the anion exchange membrane to the anode. At the anode electrode surface, the hydroxide ions participate in the oxygen evolution reaction, producing oxygen gas, which is then carried out of the reactor by the alkaline solution. Its hydrogen production performance is inextricably linked to current / voltage, temperature, and flow rate.

[0003] Chinese patent discloses an anion exchange membrane water electrolysis electrochemical testing device (authorization announcement number CN220542833 U). This patented technology can test the electrolysis reaction itself; however, it cannot experimentally detect the anion semi-permeable membrane, and its structure is relatively complex with too many operational bonds, making it difficult to simplify and apply. Therefore, those skilled in the art have provided a water electrolysis anion exchange membrane electrochemical testing device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide an electrochemical testing device for anion exchange membranes in water electrolysis to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An electrochemical testing device for anion exchange membrane electrolysis in water electrolysis includes a device body, which includes a structural component, a reaction device, and a detection device. The structural component includes a support column, the upper end of which is fixedly connected to a housing. The housing is equipped with a liquid crystal display screen and a DC power supply device at the bottom of the housing. The right side of the housing is provided with a water inlet and a first air outlet, and the left side of the housing is provided with a water outlet and a second air outlet. Preferably: the inlet is fixedly connected to the inlet pipe, the outlet is fixedly connected to the outlet pipe, the first gas outlet is fixedly connected to the oxygen pipe, and the second gas outlet is fixedly connected to the hydrogen pipe. A liquid flow rate detection device is arranged around both the inlet and outlet pipes. The liquid flow rate detection device includes a magnetic wire frame, which is connected to a microcurrent meter via an electrical wire. A gas flow rate detection device is arranged around both the oxygen and hydrogen pipes. The gas flow rate detection device includes ventilation holes, and the two ventilation holes are connected via a fan shaft. The fan shaft is equipped with a fan. The gas flow rate detection device and the liquid flow rate detection device are collectively referred to as detection equipment. Connected to the LCD screen via signal lines, the flow rates of liquids or gases in each outlet pipe can be detected on the LCD screen from the detection equipment. The gas flow rate detection device uses gas to drive a fan to rotate, and calculates data such as gas pressure and flow rate using the micro-current generated by the fan rotation. The liquid flow rate detection device uses conductive liquid to cut magnetic field lines, and the resulting micro-current is detected by a micro-current meter and calculated to obtain data such as hydraulic pressure and flow rate. When hydroxide ions pass through the anion exchange membrane, a micro-current is also generated on the surface of the anion exchange membrane. The micro-current is collected by the conductive metal layer and transmitted to the LCD screen through conductive components and voltage detection lines. The reaction rate and the working status of the anion exchange membrane are calculated.

[0006] Preferably: the oxygen pipe and water inlet pipe are fixedly connected to the anode flow channel plate; a porous anode diffusion layer is arranged parallel to the side of the anode flow channel plate away from the water inlet pipe; an anion exchange membrane is arranged parallel to the side of the porous anode diffusion layer away from the anode flow channel plate; an anode catalyst layer is provided in the cavity between the anode flow channel plate and the anion exchange membrane; the anode catalyst layer, the porous anode diffusion layer, and the anode flow channel plate are symmetrically arranged with respect to the cathode catalyst layer, the porous cathode diffusion layer, and the cathode flow channel plate about the anion exchange membrane; the cathode flow channel plate is fixedly connected to the hydrogen pipe and the water outlet pipe; the front and rear edges of the anion exchange membrane are fixedly connected to the conductive metal layer; a conductive element is provided above the conductive metal layer; the conductive element has a voltage detection line; the voltage detection line is connected to the liquid crystal display screen; the anode flow channel plate is connected to the positive terminal of the DC power supply device; the cathode flow channel... The plate is connected to the negative terminal of the DC power supply device. The outer side of the conductive metal layer, the front and rear sides of the anode catalyst layer, the edge of the anode porous diffusion layer, the edge of the anode flow channel plate, the front and rear sides of the cathode catalyst layer, the edge of the cathode porous diffusion layer, and the edge of the cathode flow channel plate are all fixedly connected to the insulating plate. The insulating plate is fixedly connected to the box body. By introducing potassium hydroxide or other alkaline solutions into the water inlet, the alkaline solution will be oxidized at the anode flow channel plate connected to the positive electrode under the action of the catalyst on the anode catalyst layer to produce oxygen and hydroxide ions. The oxygen is discharged from the device body through the oxygen pipe and collected. The hydroxide ions are reduced at the cathode flow channel plate connected to the negative electrode under the action of the catalyst on the cathode catalyst layer after passing through the anion exchange membrane to produce water and hydrogen. The hydrogen is discharged from the device body through the hydrogen pipe. Some of the water will be added back into the reaction, and some will be discharged from the device body through the water outlet.

[0007] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model can not only reflect the working condition of the anion exchange membrane through the reaction rate, but also judge the working condition of the anion exchange membrane by directly measuring the ion content on the surface of the exchange membrane.

[0008] 2. This utility model simplifies the operation to the LCD screen, resulting in higher control precision and more accurate data display. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an electrochemical testing device for anion exchange membrane in water electrolysis.

[0010] Figure 2 This is a schematic diagram of the reaction device in an electrochemical testing apparatus for anion exchange membranes in water electrolysis.

[0011] Figure 3 In an electrochemical testing device for anion exchange membrane in water electrolysis Figure 2 A magnified structural diagram at point A.

[0012] Figure 4 This is a schematic diagram of the gas flow rate detection device in an electrochemical testing device for anion exchange membranes in water electrolysis.

[0013] Figure 5 This is a schematic diagram of the liquid flow rate detection device in an electrochemical testing device for anion exchange membranes in water electrolysis.

[0014] In the diagram: 1. Device body; 2. Structural organization; 211. Support column; 212. Box; 213. LCD screen; 214. First gas outlet; 215. Water inlet; 3. Reaction device; 311. Anion exchange membrane; 312. Anode catalyst layer; 313. Anode porous diffusion layer; 314. Anode flow channel plate; 315. Cathode catalyst layer; 316. Cathode porous diffusion layer; 317. Cathode flow channel plate; 318. Voltage detection line; 319. Conductive component; 320. Conductive metal layer; 321. Insulating plate; 4. Detection equipment; 411. Gas flow rate detection device; 412. Ventilation hole; 413. Fan; 414. Fan shaft; 415. Oxygen pipeline; 416. Water inlet pipe; 417. Magnetic wire frame; 418. Microcurrent meter; 419. Liquid flow rate detection device. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-5 In this embodiment of the present invention, an electrochemical testing device for anion exchange membrane electrolysis includes a device body 1. The device body 1 includes a structural component 2, a reaction device 3, and a detection device. The structural component 2 includes a support column 211. The upper end of the support column 211 is fixedly connected to a housing 212. The housing 212 is provided with a liquid crystal display screen 213. A DC power supply device is provided at the bottom of the housing 212. A water inlet 215 and a first air outlet 214 are provided on the right side of the housing 212. A water outlet and a second air outlet are provided on the left side of the housing 212. The inlet 215 is fixedly connected to the inlet pipe 416, the outlet is fixedly connected to the outlet pipe, the first outlet 214 is fixedly connected to the oxygen pipe 415, and the second outlet is fixedly connected to the hydrogen pipe. A liquid flow rate detection device 419 is provided around both the inlet pipe 416 and the outlet pipe. The liquid flow rate detection device 419 includes a magnetic wire frame 417, which is connected to a microcurrent meter 418 via an electrical wire. A gas flow rate detection device 411 is provided around both the oxygen pipe 415 and the hydrogen pipe. The gas flow rate detection device 411 includes a ventilation hole 412, which is connected to the front and rear ventilation holes 412 via a fan shaft 414. The fan shaft 414 is equipped with a fan 413. The gas flow rate detection device 411 and the liquid flow rate detection device 419 are collectively referred to as detection equipment 4. The detection equipment 4 is connected to the LCD screen 213 via a signal line. The oxygen pipe 415 and the water inlet pipe 416 are fixedly connected to the anode flow channel plate 314. A porous anode diffusion layer 313 is arranged parallel to the side of the anode flow channel plate 314 away from the water inlet pipe 416. An anion exchange membrane 311 is arranged parallel to the side of the anode porous diffusion layer 313 away from the anode flow channel plate 314. An anode catalyst layer 312 is provided in the cavity between the anode flow channel plate 314 and the anion exchange membrane 311. The anode catalyst layer 312, the porous anode diffusion layer 313, and the anode flow channel plate 314 are symmetrically arranged with respect to the cathode catalyst layer 315, the cathode porous diffusion layer 316, and the cathode flow channel plate 317 about the anion exchange membrane 311. The cathode flow channel plate 317 is fixedly connected to the hydrogen pipe and the water outlet pipe. The front and rear edges of the membrane 311 are fixedly connected to the conductive metal layer 320. A conductive element 319 is provided above the conductive metal layer 320. The conductive element 319 is provided with a voltage detection line 318. The voltage detection line 318 is connected to the liquid crystal display screen 213. The anode flow channel plate 314 is connected to the positive terminal of the DC power supply device. The cathode flow channel plate 317 is connected to the negative terminal of the DC power supply device. The outer side of the conductive metal layer 320, the front and rear sides of the anode catalyst layer 312, the edge of the anode porous diffusion layer 313, the edge of the anode flow channel plate 314, the front and rear sides of the cathode catalyst layer 315, the edge of the cathode porous diffusion layer 316, and the edge of the cathode flow channel plate 317 are all fixedly connected to the insulating plate 321. The insulating plate 321 is fixedly connected to the housing 212.

[0017] The working principle of this invention is as follows: Potassium hydroxide or other alkaline solutions are introduced into the inlet 215. Under the action of the catalyst on the anode catalyst layer 312, the alkaline solution is oxidized at the anode flow channel plate 314 connected to the positive electrode, producing oxygen and hydroxide ions. The oxygen is collected in the device body 1 through the oxygen pipe 415. The hydroxide ions are reduced at the cathode flow channel plate 317 connected to the negative electrode through the anion exchange membrane 311 under the action of the catalyst on the cathode catalyst layer 315, producing water and hydrogen. The hydrogen is discharged from the device body 1 through the hydrogen pipe. Water is partially added back into the reaction and partially discharged from the device body 1 through the outlet. At this time, the results from the detection device 4 can be detected on the LCD screen 213. The flow rates of liquids or gases in each outlet pipe are measured. The gas flow rate detection device 411 drives the fan 413 to rotate via gas, and calculates data such as gas pressure and flow rate using the micro-current generated by the rotation of the fan 413. The liquid flow rate detection device 419 generates a micro-current by cutting magnetic field lines with conductive liquid. This micro-current is detected by the micro-current detector 418 and calculated to obtain data such as hydraulic pressure and flow rate. When hydroxide ions pass through the anion exchange membrane 311, a micro-current is also generated on the surface of the anion exchange membrane 311. The micro-current is collected by the conductive metal layer 320 and transmitted to the liquid crystal display screen 213 through the conductive component 319 and the voltage detection line 318. The reaction rate and the working status of the anion exchange membrane 311 are calculated.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electrochemical testing device for anion exchange membrane electrolysis in water electrolysis, comprising a device body (1), characterized in that, The main body (1) of the device includes a structural organization (2), a reaction device (3) and a detection device. The structural organization (2) includes a support column (211). The upper end of the support column (211) is fixedly connected to the box body (212). The box body (212) is equipped with a liquid crystal display screen (213). The bottom of the box body (212) is equipped with a DC power supply device. The right side of the box body (212) is equipped with a water inlet (215) and a first air outlet (214). The left side of the box body (212) is equipped with a water outlet and a second air outlet.

2. The electrochemical testing device for anion exchange membrane electrolysis according to claim 1, characterized in that, The inlet (215) is fixedly connected to the inlet pipe (416), the outlet is fixedly connected to the outlet pipe, the first outlet (214) is fixedly connected to the oxygen pipe (415), and the second outlet is fixedly connected to the hydrogen pipe.

3. The electrochemical testing device for anion exchange membrane electrolysis according to claim 2, characterized in that, Both the inlet pipe (416) and the outlet pipe are surrounded by a liquid flow rate detection device (419), which includes a magnetic wire frame (417) connected to a microcurrent meter (418) via an electric wire. Both the oxygen pipe (415) and the hydrogen pipe are surrounded by a gas flow rate detection device (411).

4. The electrochemical testing device for anion exchange membrane electrolysis according to claim 3, characterized in that, The gas flow rate detection device (411) includes a ventilation hole (412), and the two ventilation holes (412) are connected by a fan rotating shaft (414). The fan rotating shaft (414) is equipped with a fan (413). The gas flow rate detection device (411) and the liquid flow rate detection device (419) are collectively referred to as detection equipment (4). The detection equipment (4) is connected to the liquid crystal display screen (213) through a signal line.

5. The electrochemical testing device for anion exchange membrane electrolysis according to claim 3, characterized in that, The oxygen pipe (415) and water inlet pipe (416) are fixedly connected to the anode flow channel plate (314).

6. The electrochemical testing device for anion exchange membrane in water electrolysis according to claim 5, characterized in that, The anode flow channel plate (314) is provided with a porous anode diffusion layer (313) on the side away from the water inlet pipe (416), and an anion exchange membrane (311) is provided on the side away from the anode flow channel plate (314). An anode catalyst layer (312) is provided in the cavity between the anode flow channel plate (314) and the anion exchange membrane (311).

7. The electrochemical testing device for anion exchange membrane in water electrolysis according to claim 6, characterized in that, The anode catalyst layer (312), anode porous diffusion layer (313), and anode flow channel plate (314) are symmetrically arranged with the cathode catalyst layer (315), cathode porous diffusion layer (316), and cathode flow channel plate (317) about the anion exchange membrane (311). The cathode flow channel plate (317) is fixedly connected to the hydrogen pipeline and the water outlet pipe. The front and rear edges of the anion exchange membrane (311) are fixedly connected to the conductive metal layer (320).

8. The electrochemical testing device for anion exchange membrane in water electrolysis according to claim 7, characterized in that, A conductive element (319) is provided above the conductive metal layer (320). The conductive element (319) is provided with a voltage detection line (318). The voltage detection line (318) is connected to the liquid crystal display screen (213). The anode flow channel plate (314) is connected to the positive terminal of the DC power supply device. The cathode flow channel plate (317) is connected to the negative terminal of the DC power supply device.

9. The electrochemical testing device for anion exchange membrane in water electrolysis according to claim 7, characterized in that, The outer side of the conductive metal layer (320), the front and rear sides of the anode catalyst layer (312), the edge of the anode porous diffusion layer (313), the edge of the anode flow channel plate (314), the front and rear sides of the cathode catalyst layer (315), the edge of the cathode porous diffusion layer (316), and the edge of the cathode flow channel plate (317) are all fixedly connected to the insulating plate (321), and the insulating plate (321) is fixedly connected to the housing (212).

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