Ionic membrane defect detection device and ionic membrane defect detection method

Abstract

The invention provides an ionic membrane defect detection device and an ionic membrane defect detection method. The ionic membrane defect detection device comprises a hydrogen supply mechanism and a test box, a discoloration detection layer is arranged in a box body of the test box, a storage layer is arranged on the lower side of the discoloration detection layer, a detection layer is arranged above the discoloration detection layer, and the detection layer is used for detecting the color change of the discoloration detection layer; a gas chamber is arranged on the lower side of the storage layer and connected with a hydrogen supply mechanism, and the color change detection layer can chemically react with hydrogen. The storage layer is arranged in the test box and used for installing the to-be-tested diaphragm, when the diaphragm is perforated, hydrogen can penetrate through the diaphragm to chemically react with chemical substances in the color change detection layer opposite to the perforated position and generate color change, the color change is recorded through the detection layer, and then the perforated position of the diaphragm can be determined. The detection device can be suitable for detection of diaphragms with different perforation apertures, and has higher detection precision.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production equipment, and in particular to an ion membrane defect detection device and an ion membrane defect detection method. Background Art

[0002] Hydrogen energy has attracted widespread attention due to its high energy density, low environmental pollution, and zero carbon dioxide emissions. Using renewable electricity to produce hydrogen as fuel or chemical raw materials through water electrolysis is one of the promising solutions for green hydrogen production. Traditional alkaline water electrolysis technology has defects such as low energy efficiency and high explosion risk, which limits its further application. In order to meet the requirements of the next generation of hydrogen production, advanced water electrolysis technology with high energy efficiency and high gas barrier has been increasingly widely studied. Among them, anion membrane water electrolysis technology not only has high electrochemical performance and high safety, but also inherits the characteristics of low precious metal usage of traditional alkaline water electrolysis technology, and has obvious advantages in reducing costs. Therefore, anion membrane water electrolysis technology with high power and high cost performance has strong competitiveness in future large-scale water electrolysis hydrogen production.

[0003] As one of the core components in anion membrane water electrolysis technology, anion membranes are prone to bubbles, microcracks or some micropores in the packaging area during the actual production process. These defects are difficult to detect by conventional detection methods. At present, there is a traditional water inspection bubbling method for detecting the perforation points of anion membranes in anion membrane water electrolysis. The traditional water inspection method is only suitable for detecting large pores of millimeters or more formed by proton exchange membranes, and the water inspection bubbling method has high requirements for water quality. This method is not suitable for detecting micron-level pinholes on proton exchange membranes, and the water inspection method for ion membranes is not suitable for large-area, rapid inspections. At the same time, the mechanical properties of the membrane will change after the method is detected, such as curling, which will affect subsequent use. Summary of the invention

[0004] In order to solve the above problems, an object of the present invention is to provide an ion membrane defect detection device and an ion membrane defect detection method.

[0005] The present invention is implemented by the following method: an ion membrane defect detection device, including a hydrogen gas supply mechanism, including a test box, a color change detection layer is provided in the box body of the test box, a storage layer is provided at the lower side of the color change detection layer, a detection layer is provided above the color change detection layer, and the detection layer is used to detect the color change of the color change detection layer; an air chamber is provided at the lower side of the storage layer, the air chamber is connected to the hydrogen gas supply mechanism, and the color change detection layer can chemically react with hydrogen. Preferably, the color-changing detection layer is composed of a thermochromic layer and a catalyst layer, the catalyst layer is arranged at one end of the thermochromic layer facing the air chamber, and the thermochromic layer is opposite to the detection layer.

[0006] Preferably, a thermochromic agent is provided in the thermosensitive layer.

[0007] Preferably, the thermochromic agent has four types, namely CoBr 2 ·2C 6 H 12 N 4 10H 2 O. CoI 2 2C 6 H 12 N 4 10H 2 O. CoSO 4 ·2C 6 H 12 N 4 9H 2 O、NiCl 2 2C 6 H 12 N 4 10H 2 O.

[0008] Preferably, the catalyst layer is made of Pt / C or Pd / C.

[0009] Preferably, the four thermochromic agents are mixed together in a ratio of 1:1:1:1.

[0010] Preferably, tempered glass is provided on the lower side of the detection layer, and the lower side of the tempered glass covers the thermochromic layer. A camera is provided in the detection layer, and the camera is used to capture the color change of the thermochromic layer on the lower side of the tempered glass and transmit the image captured by the camera to the grayscale color sensor.

[0011] Preferably, a telescopic rod is connected between the air chamber and the storage layer, and the storage layer is pressed against the air chamber when the telescopic rod is retracted; and the storage layer has a drawer that can be pushed and pulled relative to the box body.

[0012] A method for detecting ion membrane defects is used according to the following steps: Step S1, placing the membrane to be tested into the storage layer and fixing it; Step S2, the gas supply mechanism supplies hydrogen to the gas chamber, and the detection layer starts working; Step S3, the detection layer monitors the color change of the color-changing detection layer. If the diaphragm is damaged, hydrogen will escape upward through the damaged part of the diaphragm and react with the catalyst at the corresponding position to release heat to cause the color of the color-changing detection layer to change. The detection layer records the color change part of the color-changing detection layer and confirms the degree and position of the damage through grayscale conversion.

[0013] Preferably, in step S3, the hydrogen that passes through the damaged position of the membrane reacts with the catalyst layer in the color-changing detection layer to generate heat, and the heat is transferred to the thermosensitive layer in the color-changing detection layer opposite to it. The thermosensitive layer absorbs heat and changes color, which is captured and recorded by the camera of the detection layer to determine the damaged position of the membrane.

[0014] The beneficial effects of the present invention are: The present invention provides an ion membrane defect detection device. Compared with the prior art, the present invention has at least the following technical effects: 1. By setting a storage layer in a test box for installing a diaphragm to be tested, and setting a color change detection layer on the storage layer, setting an air chamber on the lower side of the storage layer, and setting a detection layer on the color change detection layer; in this way, when the diaphragm is perforated, hydrogen will pass through the diaphragm and react with the chemical substances in the color change detection layer relative to the perforation position, and produce a color change. The color change can be recorded by the detection layer to determine the perforation position of the diaphragm, which can adapt to the detection of diaphragms with different perforation apertures. Compared with the water detection method, the detection result is intuitive and has no requirements for water quality, and has higher detection accuracy. 2. Hydrogen will immediately react with oxygen in the air under the action of the catalytic layer. Since the temperature instantly generated by the catalytic layer is much higher than the temperature at which the heat-sensitive layer changes color, the mixed heat-sensitive layer can change to different colors at different temperatures, so that the leakage point of the diaphragm can be quickly determined. 3. The thermochromic agent in the heat-sensitive layer changes color after being heated, which helps to quickly determine the leakage point. 4. Thermochromic agent contains CoBr 2 ·2C 6 H 12 N 4 10H 2 O. CoI 2 ·2C 6 H 12 N 4 10H 2 O. CoSO 4 ·2C 6 H 12 N 4 9H 2 O、NiCl 2 ·2C 6 H 12 N 4 10H 2 O,CoBr 2 ·2C 6 H 12 N 4 10H 2 O changes from pink to blue at 40℃, CoI 2 ·2C 6 H 12 N 4 10H 2O changes from pink to green at 50℃, CoSO 4 2C 6 H 12 N 4 9H 2 O turns from pink to purple at 60℃, NiCl 2 2C 6 H 12 N 4 10H 2 O changes from pink to crimson at 75°C. While determining the location of the leak point, the temperature of the current leak point can be quickly determined. 5. The storage layer and the air chamber are connected with a telescopic rod, and the storage layer is set as a drawer type, which is convenient for quickly loading the ion membrane to be tested into the storage layer.

[0015] The present invention provides an ion membrane defect detection method. Compared with the prior art, the present invention has at least the following technical effects: 1. By setting a storage layer in the test box for installing the diaphragm to be tested, when the diaphragm is perforated, the hydrogen in the air chamber will pass through the diaphragm and react with the chemical substances in the color-changing detection layer corresponding to the perforation position, and produce a color change. The perforation position of the diaphragm can be determined by recording the color change through the detection layer. It can adapt to the detection of diaphragms with different perforation apertures. Compared with the water detection method, the detection result is intuitive and has no requirements on water quality, and has higher detection accuracy. 2. Hydrogen will immediately react with oxygen in the air under the action of the catalytic layer. At this time, the temperature instantly generated by the catalytic layer will be much higher than the temperature of the thermal layer changing color. The mixed thermal layer can change to different colors at different temperatures, and the leakage point of the diaphragm can be quickly determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an ion membrane defect detection device of the present invention.

[0017] Figure 2 The present invention is a schematic diagram of the use process of an ion membrane defect detection method.

[0018] Explanation of the accompanying drawings: 1. Hydrogen inlet; 2. Storage layer; 3. Telescopic rod; 4. Catalyst layer; 5. Thermochromic layer; 6. Tempered glass; 7. Camera; 8. Air chamber. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] See also Figure 1, an ion membrane defect detection device, including a hydrogen supply mechanism, including a test box, a color change detection layer is provided in the box body of the test box, a storage layer 2 is provided on the lower side of the color change detection layer, a detection layer is provided above the color change detection layer, and the detection layer is used to detect the color change of the color change detection layer; an air chamber 8 is provided on the lower side of the storage layer 2, and the air chamber 8 is connected to the hydrogen supply mechanism, and the color change detection layer can react chemically with hydrogen. By setting a storage layer 2 in the test box for installing the diaphragm to be tested, and setting a color change detection layer on the storage layer 2, setting an air chamber 8 on the lower side of the storage layer 2, and setting a detection layer on the color change detection layer; in this way, when the diaphragm is perforated, hydrogen passes through the diaphragm and reacts chemically with the chemical substances in the color change detection layer relative to the perforation position, and produces a color change, and the color change is recorded by the detection layer, so that the perforation position of the diaphragm can be determined, which can adapt to the detection of diaphragms with different perforation apertures, and the detection result is intuitive, which can avoid the requirements of the water quality of the water detection bubbling method, and has higher detection accuracy. The gas chamber 8 is provided with a hydrogen inlet 1 for connecting to a gas supply mechanism.

[0021] See also Figure 1 Preferably, the color-changing detection layer is composed of a thermochromic layer 5 and a catalyst layer 4, and the catalyst layer 4 is arranged at one end of the thermochromic layer 5 facing the air chamber 8, and the thermochromic layer 5 is directly opposite to the detection layer. Hydrogen will immediately react with oxygen in the air under the action of the catalyst layer. Since the temperature instantly generated by the catalyst layer is much higher than the color-changing temperature of the thermosensitive layer, the mixed thermosensitive layer can change to different colors at different temperatures, so that the leakage point of the diaphragm can be quickly determined.

[0022] Preferably, the thermochromic agent is provided in the thermosensitive layer. The thermochromic agent in the thermosensitive layer changes color when heated, which helps to quickly identify the leakage point.

[0023] Preferably, the thermochromic agent has four types, namely CoBr 2 2C 6 H 12 N 4 10H 2 O. CoI 2 ·2C 6 H 12 N 4 10H 2 O. CoSO 4 ·2C 6 H 12 N 4 9H 2 O、NiCl 2 ·2C 6 H 12 N 4 10H 2O. Thermochromic agent contains CoBr 2 ·2C 6 H 12 N 4 10H 2 O. CoI 2 ·2C 6 H 12 N 4 10H 2 O. CoSO 4 ·2C 6 H 12 N 4 9H 2 O、NiCl 2 ·2C 6 H 12 N 4 10H 2 O,CoBr 2 ·2C 6 H 12 N 4 10H 2 O changes from pink to blue at 40℃, CoI 2 ·2C 6 H 12 N 4 10H 2 O changes from pink to green at 50℃, CoSO 4 ·2C 6 H 12 N 4 9H 2 O changes from pink to purple at 60°, NiCl 2 ·2C 6 H 12 N 4 10H 2 O changes from pink to crimson at 75℃. While determining the location of the leak, the temperature of the current leak can be quickly determined.

[0024] Preferably, the catalyst layer 4 is made of Pt / C or Pd / C to accelerate the reaction speed and improve the detection efficiency.

[0025] Preferably, the four thermochromic agents are mixed together in a ratio of 1:1:1:1.

[0026] See also Figure 1Preferably, a tempered glass 6 is provided on the lower side of the detection layer, and the lower side of the tempered glass 6 covers the thermochromic layer 5. A camera 7 is provided in the detection layer, and the camera 7 is used to shoot the color change of the thermochromic layer 5 on the lower side of the tempered glass 6, and transmit the image shot by the camera 7 to the grayscale color sensor. The camera 7 monitors the color change of the thermosensitive layer through the tempered glass 6, and transmits the image to the grayscale color sensor for color data comparison, and finally transmits the data to the PLC system through wireless remote transmission. The position where the grayscale color sensor detects the largest color change is the leakage point of the film. If there are multiple positions, the leakage will also reach the point-to-point detection of the damaged position of the film. The grayscale color sensor is a photoelectric sensor that can measure the color depth of the surface of an object. Its working principle is based on the photosensitivity characteristics of the photosensitive element. The grayscale sensor determines the grayscale value of the object by measuring the intensity of the received light and converting it into an electrical signal.

[0027] See also Figure 1 Preferably, a telescopic rod 3 is connected between the air chamber 8 and the storage layer 2, and the storage layer 2 is pressed against the air chamber 8 when the telescopic rod 3 is retracted; the storage layer 2 has a drawer that can be pushed and pulled relative to the box body. A telescopic track is provided in the storage layer 2, and the drawer is installed on the telescopic track. The drawer is hollow, and a fixed frame is provided on the drawer. A sealing gasket is provided on the lower surface of the fixed frame, and a sealing gasket is also provided on the upper surface of the drawer at a position opposite to the fixed frame. A through hole is provided at a position of the fixed frame avoiding the sealing gasket, and a threaded hole is provided at a corresponding position on the upper surface of the drawer. The screw passes through the through hole and penetrates into the threaded hole to fix the fixed frame on the drawer, thereby sealing and fixing the diaphragm. A sealing ring is provided on the lower surface of the drawer. During the contraction of the telescopic rod 3, the sealing ring under the drawer is clamped between the upper end surface of the drawer and the air chamber 8, which can play a role in sealing the gap between the drawer and the air chamber 8.

[0028] See also Figure 2 , a method for detecting ion membrane defects, is used according to the following steps: Step S1, placing the membrane to be tested into the storage layer 2 and fixing it; Step S2, the gas supply mechanism supplies hydrogen to the gas chamber 8, and the detection layer starts working; Step S3, the detection layer monitors the color change of the color-changing detection layer. If the diaphragm is damaged, hydrogen will escape upward through the damaged part of the diaphragm and react with the catalyst at the corresponding position to release heat, causing the color-changing detection layer to change color. The detection layer records the color change position of the color-changing detection layer, and confirms the degree of damage and the damage position through grayscale conversion. By setting a storage layer 2 in the test box for installing the diaphragm to be tested, when the diaphragm is perforated, the hydrogen in the air chamber 8 will pass through the diaphragm and react with the chemical substances in the color-changing detection layer relative to the perforated position, and produce color changes. By recording the color change through the detection layer, the perforation position of the diaphragm can be determined, which can adapt to the detection of diaphragms with different perforation apertures. The detection result is more intuitive, eliminating the water quality requirements of the water detection bubbling method, and has higher detection accuracy.

[0029] Preferably, in step S3, the hydrogen that passes through the damaged position of the membrane reacts with the catalyst layer 4 in the color-changing detection layer to generate heat, and the heat is transferred to the thermosensitive layer in the color-changing detection layer opposite to it. The thermosensitive layer absorbs heat and changes its color, which is captured and recorded by the camera 7 of the detection layer to determine the damaged position of the membrane.

[0030] The present invention has the following working principle: After the film to be tested is placed in the drawer, the fixing frame is fixed with screws to clamp the film to be tested. The sealing sheet can seal on the one hand and protect the film to be tested on the other hand to prevent it from being damaged by the fixing frame and the drawer; the drawer is pushed into the storage layer 2 along the telescopic track of the storage layer 2 to tighten the telescopic rod 3 of the device, and then H2 is filled into the hydrogen inlet 1 of the gas chamber 8. If the film is damaged, hydrogen will escape from the damaged part of the film to the catalyst layer 4. Under the action of the catalyst Pt / C or Pd / C, hydrogen will immediately react with oxygen in the air. The temperature generated instantly by the catalyst layer will be much higher than the temperature at which the thermal layer changes color. The mixed thermal layer can change to different colors at different temperatures. The camera 7 monitors the color change of the thermal layer through the tempered glass 6, and transmits the image to the grayscale color sensor for color data comparison. Finally, the data is wirelessly transmitted to the PLC system. The grayscale color sensor detects that the position with the largest color change is the leakage point of the film. If there are multiple leaks, the point-to-point detection of the film damage position can be achieved.

[0031] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0032] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0033] Finally, the above is only a preferred implementation of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0034] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as within the scope of protection of the present invention.

Claims

1. An ion membrane defect detection device, comprising a hydrogen gas supply mechanism, characterized in that: The invention comprises a test box, wherein a color-changing detection layer is provided in the box body of the test box, a storage layer is provided at the lower side of the color-changing detection layer, a detection layer is provided above the color-changing detection layer, and the detection layer is used to detect the color change of the color-changing detection layer; an air chamber is provided at the lower side of the storage layer, the air chamber is connected to the hydrogen supply mechanism, and the color-changing detection layer can chemically react with hydrogen.

2. An ion membrane defect detection device according to claim 1, characterized in that: The color change detection layer is composed of a thermochromic layer and a catalyst layer. The catalyst layer is arranged at one end of the thermochromic layer facing the air chamber, and the thermochromic layer is directly opposite to the detection layer.

3. An ion membrane defect detection device according to claim 2, characterized in that: The thermochromic agent is arranged in the thermosensitive layer.

4. An ion membrane defect detection device according to claim 3, characterized in that: The thermochromic agents include four types, namely CoBr2·2C6H 12 N4·10H2O、CoI2·2C6H 12 N4·10H2O, CoSO4·2C6H 12 N4·9H2O, NiCl2·2C6H 12 N4·10H2O.

5. An ion membrane defect detection device according to claim 4, characterized in that: The four thermochromic agents are mixed together in a ratio of 1:1:1:

1.

6. An ion membrane defect detection device according to claim 2, characterized in that: The catalyst layer is made of Pt / C or Pd / C.

7. An ion membrane defect detection device according to claim 2, characterized in that: A tempered glass is provided on the lower side of the detection layer, and the lower side of the tempered glass covers the thermochromic layer. A camera is provided in the detection layer, and the camera is used to capture the color change of the thermochromic layer on the lower side of the tempered glass and transmit the image captured by the camera to the grayscale color sensor.

8. An ion membrane defect detection device according to claim 1, characterized in that: A telescopic rod is connected between the air chamber and the storage layer, and the storage layer is pressed against the air chamber when the telescopic rod is retracted; the storage layer has a drawer that can be pushed and pulled relative to the box body.

9. An ion membrane defect detection method using the ion membrane defect detection device according to any one of claims 1 to 8, characterized in that: Follow these steps to use: Step S1, placing the membrane to be tested into the storage layer and fixing it; Step S2, the gas supply mechanism supplies hydrogen to the gas chamber, and the detection layer starts working; Step S3, the detection layer monitors the color change of the color-changing detection layer. If the diaphragm is damaged, hydrogen will escape upward through the damaged part of the diaphragm and react with the catalyst at the corresponding position to release heat to cause the color of the color-changing detection layer to change. The detection layer records the color change part of the color-changing detection layer and confirms the degree and position of the damage through grayscale conversion.

10. The method for detecting ion membrane defects according to claim 9, characterized in that: In step S3, the hydrogen that passes through the damaged position of the diaphragm reacts with the catalyst layer in the color-changing detection layer to generate heat, and the heat is transferred to the thermosensitive layer in the color-changing detection layer opposite to it. The thermosensitive layer absorbs heat and changes color, which is captured and recorded by the camera of the detection layer to determine the damaged position of the diaphragm.

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