Rapid pressure test and leakage test device for electrolytic cell
By installing a gas supply and alkali circulation device in the electrolytic cell and observing the escape of bubbles through an observation window, the problem of complex internal and external leakage detection in existing technologies is solved, achieving rapid and efficient leakage detection of the electrolytic cell and improving detection efficiency and accuracy.
Patent Information
- Application Number
- CN202423123326.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing methods for testing leakage in electrolyzers cannot simultaneously and quickly detect both internal and external leaks, and the testing process is complex and cumbersome, failing to meet the requirements for rapid performance testing of water electrolysis devices.
A rapid pressure and leak testing device for electrolytic cells was designed. By setting up a gas supply mechanism and an alkaline solution circulation device in the electrolytic cell, observing the escape of bubbles through an observation window, and combining it with an electric heater to simulate actual working conditions, the device can simultaneously detect leaks inside and outside the electrolytic cell.
It enables rapid and efficient detection of internal and external leaks in electrolytic cells, simplifies the detection process, improves detection efficiency, simulates the real working environment of electrolytic cells, and ensures the accuracy of the test.
Smart Images
Figure CN223565180U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to unit groove's leak detection technical field, especially a kind of electrolytic cell quick leak detection device. BACKGROUND
[0002] In recent years, water electrolysis hydrogen production technology has become a research hotspot in the field of hydrogen production due to its high efficiency, zero emission, compact structure, environmental friendliness, high purity of product and other advantages, and its high-purity oxygen product has also been used in aerospace, medical, analysis and other fields. At present, in the water electrolysis hydrogen production technology, alkaline water electrolysis hydrogen production (AWE) and proton exchange membrane water electrolysis hydrogen production (PEMWE) have gradually been industrialized, therefore, the performance detection and long-time operation monitoring of water electrolysis device have become an indispensable part of the development of the industry.
[0003] The existing ion exchange membrane electrolytic cell is composed of multiple ion exchange membrane unit cells. For rapid pressure test of ion exchange membrane electrolytic cell, each ion exchange membrane unit cell needs to be tested and repaired first. The leakage test of ion exchange membrane unit cell is an important part of the test and repair of ion exchange membrane unit cell. However, some pressure test devices have appeared, which are used to ventilate the electrolytic cell. These tests can only test whether there is external leakage. If the pressure drops, it means that the electrolytic cell is leaking. However, it is not possible to determine whether the ion exchange membrane inside the electrolytic cell is damaged and leaking. The electrolytic cell needs to be tested separately to determine whether it is leaking. That is, the ion exchange membrane needs to be removed and fixed by a special clamping tool for testing. The testing process is very complex and tedious, and it is not possible to quickly and effectively detect the internal and external leakage of the electrolytic cell. SUMMARY
[0004] To solve the above problems, the utility model aims to provide a kind of electrolytic cell quick leak detection device.
[0005] The utility model adopts the following method: a kind of electrolytic cell quick leak detection device, including electrolytic cell and gas supply mechanism, the electrolytic cell is located in first water tank, the electrolytic cell is connected with intake pipeline on one side, and alkali liquor circulating device is connected with the other side of electrolytic cell, and is respectively located in ion exchange membrane both sides in electrolytic cell;The first water tank is filled with water, and the electrolytic cell is immersed;The gas supply mechanism is connected with the intake pipeline;The first water tank is provided with first observation window, and the first observation window is directly opposite the electrolytic cell, to observe the leakage of the electrolytic cell;The alkali liquor circulating device is connected with the first water tank by connecting pipeline, and the connecting pipeline is connected with second observation window, to observe the leakage of the electrolytic cell ion exchange membrane.
[0006] The preferred alkali liquor circulating device comprises a second water tank filled with alkali liquor and a circulating pump, the inlet end of which is connected to the outlet of the second water tank, and the outlet end of which is connected to an alkali liquor inlet on one side of the electrolytic tank; the same side of the electrolytic tank is also provided with a backflow port connected to the second water tank.
[0007] Preferably, the alkali liquor inlet and the backflow port are arranged on the anode side of the electrolytic tank.
[0008] Preferably, the second observation window is arranged in the second water tank, and the connecting pipeline is connected between the backflow port and the second water tank.
[0009] Preferably, the alkali liquor circulating device further comprises a first electric heater arranged in the second water tank for heating the alkali liquor in the second water tank.
[0010] Preferably, the first water tank is provided with a second electric heater for heating the liquid in the first water tank.
[0011] Preferably, the first water tank is provided with a first temperature sensor, and the second water tank is provided with a temperature sensor.
[0012] Preferably, the gas supply mechanism comprises a gas supply bottle filled with nitrogen or hydrogen, which is connected to the gas inlet pipeline.
[0013] Preferably, the gas inlet pipeline comprises a hard pipe and a soft pipe, the cathode side of the electrolytic tank is provided with a gas inlet, the gas inlet is connected to the soft pipe, the soft pipe is connected to the hard pipe, the hard pipe is connected to the gas supply bottle, and the hard pipe is provided with a gas valve, a pressure relief valve and a pressure gauge.
[0014] Preferably, the electrolytic tank clamping device comprises a one-end support rod and a two-end hydraulic rod, the one-end support rod is fixed to one side of the first water tank and abuts against one end of the electrolytic tank, and the two-end hydraulic rod is installed on the other side of the second water tank and can abut against the other end of the electrolytic tank.
[0015] The utility model discloses an electrolytic cell rapid pressure test leak device, compared with prior art, the utility model discloses at least have following technical effect: 1. by being placed in the electrolytic cell in the water tank, and the gas supply mechanism is accessed in one side of ion membrane, the alkali liquor circulation mechanism is accessed in the other side of ion membrane, if the external leakage (that is, the electrolytic cell shell leaks), the bubble can escape from the outer wall of electrolytic cell, and then float from the water in the first water tank, the bubble can be observed through the first observation window set on the first water tank, if the internal leakage (that is, ion membrane leaks), the gas supply mechanism supplies the gas, and the alkali liquor circulation mechanism carries out the alkali liquor circulation, and gas passes through ion membrane and enters the other side, and the bubble will circulate along with the connecting pipeline, so that the second observation window connected with the connecting pipeline can observe the escape condition of gas, and the connecting pipe is set to prolong the escape path of internal leakage gas, to avoid mixing with the electrolytic cell external leakage gas overflow, so that the internal leakage and the external leakage of electrolytic cell can be measured simultaneously, and rapid and efficient detection is realized, if no bubble is detected, the electrolytic cell can be repeatedly pressurized and released through the gas supply mechanism, and rapid pressure test is carried out. 2. the alkali liquor circulation device circulates the electrolytic cell through the second water tank and the circulating pump, and the circulation of the electrolytic cell is simulated when the electrolytic cell works, and the state of liquid supplementing is also simulated, and the bubble generated by internal leakage can be taken out of the electrolytic cell, so that observation is facilitated. 3. the second observation window is arranged in the second water tank, can be better distinguished from the first observation window of the first water tank, and the operator can quickly and accurately distinguish internal leakage or external leakage. 4. the second water tank and the first water tank are equipped with electric heaters, and the alkali liquor in the second water tank and the water in the first water tank can be heated, so that the actual working condition of the electrolytic cell is simulated, so as to guarantee the test to be close to the actual situation as far as possible. 5. the electrolytic cell clamping device is also arranged, which is used for fixing the electrolytic cell in the first water tank, to avoid direct placement, and the bottom surface of the electrolytic cell is shielded by the bottom surface of the first water tank. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a structure schematic diagram of the utility model of an electrolytic cell rapid pressure test leak device.
[0017] Explanation of the attached drawings: 1, electrolytic cell;11, alkali liquor inlet;12, backflow port;13, first end plate;14, second end plate, 2, first water tank;21, first observation window;22, second electric heater;3, gas inlet pipeline;31, hard pipe;32, hose;33, gas inlet valve;34, pressure relief valve;35, pressure gauge;4, alkali liquor circulation device;41, second water tank;42, circulating pump;43, first electric heater;5, connecting pipeline;6, second observation window;7, first temperature sensor;8, electrolytic cell clamping device;81, one end support rod;82, two end hydraulic rod;9, support plate;10, second temperature sensor. DETAILED DESCRIPTION
[0018] The utility model makes further illustration in combination with the drawings and specific embodiments.
[0019] Please refer to Figure 1 A kind of electrolytic cell 1 rapid test pressure leakage device, including electrolytic cell 1 and gas supply mechanism, the electrolytic cell 1 is located in first water tank 2, one side of the electrolytic cell 1 is connected with air inlet pipeline 3, alkali circulating device 4 is connected to the other side of the electrolytic cell 1, respectively located in the ion exchange membrane both sides of electrolytic cell 1;The first water tank 2 is filled with water, and the electrolytic cell 1 is immersed;The gas supply mechanism is connected with the air inlet pipeline 3;The first water tank 2 is equipped with first observation window 21, and the first observation window 21 is directly opposite the electrolytic cell 1, to observe the leakage of the electrolytic cell 1;Alkali circulating device 4 is connected with the first water tank 2 by connecting pipeline 5, and the connecting pipeline 5 is connected with second observation window 6, for observing the leakage of ion exchange membrane of the electrolytic cell 1. By placing electrolytic cell 1 in water tank, and connecting gas supply mechanism on one side of ion exchange membrane, and connecting alkali circulating mechanism on the other side of ion exchange membrane, if external leakage occurs (i.e. the shell of electrolytic cell 1 leaks), bubbles will escape from the outer wall of electrolytic cell 1, and then float from the water in the first water tank 2, and the bubbles can be observed through the first observation window 21 arranged on the first water tank 2;If internal leakage occurs (i.e. ion exchange membrane leaks), the gas supply mechanism supplies gas, and the alkali circulating mechanism circulates alkali, so that the gas passes through the ion exchange membrane to the other side, and the bubbles will circulate along the connecting pipeline 5, so that the escape of the gas can be observed through the second observation window 6 connected with the connecting pipeline 5, and the connecting pipeline is arranged to prolong the escape path of the internal leakage gas, to avoid mixing with the external leakage gas of electrolytic cell 1. Thus, the internal and external leakage of electrolytic cell 1 can be measured simultaneously, and rapid and efficient detection can be realized. If no bubbles are detected, the electrolytic cell 1 can be repeatedly subjected to pressure application and release by the gas supply mechanism for multiple times to perform rapid pressure test
[0020] Please refer to Figure 1 Preferably, the alkali circulating device 4 includes a second water tank 41 and a circulating pump 42, the second water tank 41 is filled with alkali, the inlet end of the circulating pump 42 is connected to the outlet of the second water tank 41, one side of the electrolytic cell 1 is provided with an alkali inlet 11, and the outlet end of the circulating pump 42 is connected with the alkali inlet 11. The same side of the electrolytic cell 1 is also provided with a backflow port 12, and the backflow port 12 is connected with the second water tank 41. The alkali circulating device 4 circulates the electrolytic cell 1 by the second water tank 41 and the circulating pump 42, simulates the state of circulating liquid supplement of the electrolytic cell 1 during work, and can also take the bubbles generated by internal leakage out of the electrolytic cell 1, to facilitate observation.
[0021] Please refer to Figure 1Preferably, the alkali liquid inlet 11 and the backflow port 12 are arranged at the anode side of the electrolytic cell 1.
[0022] Please refer to Figure 1 Preferably, the second observation window 6 is arranged in the second water tank 41, and the connecting pipeline 5 is connected between the backflow port 12 and the connecting pipe. The second observation window 6 arranged in the second water tank 41 can be better distinguished from the first observation window 21 of the first water tank 2, so as to facilitate the operator to quickly and accurately distinguish the internal leakage or external leakage.
[0023] Please refer to Figure 1 Preferably, the alkali liquid circulating device 4 further comprises a first electric heater 43 arranged in the second water tank 41 and used for heating the alkali liquid in the second water tank 41. The first water tank 2 is provided with a second electric heater 22 used for heating the liquid in the first water tank 2. The electric heaters arranged in the second water tank 41 and the first water tank 2 can heat the alkali liquid in the second water tank 41 and the water in the first water tank 2, so as to simulate the real working condition of the electrolytic cell 1 and to ensure that the test is as close to the actual situation as possible.
[0024] Please refer to Figure 1 Preferably, the first water tank 2 is provided with a first temperature sensor 7, and the second water tank 41 is provided with a second temperature sensor 10. The first temperature sensor 7 and the second temperature sensor 10 are used for monitoring the temperature of the liquid in the first water tank 2 and the second water tank 41, so as to timely adjust the working condition of the first electric heater 43 and the second electric heater 22.
[0025] Please refer to Figure 1 Preferably, the gas supply mechanism (not shown) comprises a gas supply bottle filled with nitrogen or hydrogen, and the gas supply bottle is connected with the gas inlet pipeline 3. The gas inlet pipeline 3 comprises a hard pipe 31 and a soft pipe 32. The cathode side of the electrolytic cell 1 is provided with a gas inlet port connected with the soft pipe 32, the soft pipe 32 is connected with the hard pipe 31, the hard pipe 31 is connected with the gas supply bottle, and the hard pipe 31 is provided with a gas valve, a pressure relief valve 34 and a pressure gauge 35. The gas supply mechanism repeatedly applies and releases pressure to the electrolytic cell 1 for multiple times, and the mechanical durability of the ion exchange membrane is evaluated by observing the pressure drop rate of the pressure gauge 35.
[0026] Please refer to Figure 1, preferably, further comprising electrolytic cell clamping device 8, electrolytic cell clamping device 8 comprises one end support rod 81 and two end hydraulic rod 82, one end support rod 81 is fixed to one side in first water tank 2, one end support rod 81 is against one end of electrolytic cell 1, two end hydraulic rod 82 is installed on the other side of second water tank 41, and the other end of electrolytic cell 1 can be against the other end of electrolytic cell 1. For fixing electrolytic cell 1 in first water tank 2, avoiding direct placement, the bottom surface of electrolytic cell 1 is blocked by the bottom surface of first water tank 2. The end of two end hydraulic rod 82 away from electrolytic cell 1 is fixed to support plate 9. Alternatively, end hydraulic rod 82 can also be replaced by air cylinder, electric telescopic cylinder, etc.
[0027] The utility model has the following working principle:
[0028] 1, the first end plate 13 of electrolytic cell 1 and one end support rod 81 are pasted tightly, the second end plate 14 of electrolytic cell 1 is clamped against two end hydraulic rod 82, and two end hydraulic rod 82 works tightly against second end plate 14 to clamp electrolytic cell 1, so that electrolytic cell 1 is clamped tightly.
[0029] 2, start first electric heater and set temperature, start circulating pump and pour lye into electrolytic cell from lye inlet and flow out from reflux port to return to second water tank through connecting pipe. At this time, observe whether there is liquid leakage phenomenon in each pipeline and electrolytic cell;
[0030] 3, inject tap water into first water tank to the uppermost edge of the first observation window of the first water tank and open second electric heater, set the required temperature, simulate the working condition of electrolytic cell. Then, through the gas supply mechanism, N2 or H2 is filled into the electrolytic cell, the pressure is slowly increased from low to high, and the pressure is maintained for 30 minutes after reaching the test pressure. Check the connecting parts. At this time, observe whether there are bubbles in the internal / external leakage observation window of the second water tank and the first water tank. If there are bubbles, it indicates that there are internal or external leakage points;
[0031] 4, after no bubbles are observed in the second observation window of the second water tank and the first observation window of the first water tank and the pressure maintaining is completed, the gas supply mechanism repeatedly applies and releases pressure to the electrolytic cell multiple times, and the mechanical durability of the ion exchange membrane is evaluated by observing the pressure drop rate of the pressure gauge;
[0032] It should be pointed out that, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection. "Up", "down", "left", "right" are only used to indicate relative position relationship. When the absolute position of the described object changes, the relative position relationship may change.
[0033] Secondly: the utility model discloses the embodiment in the drawing, only relate to the structure with the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of not conflict, the same embodiment and different embodiments of the utility model can be combined with each other.
[0034] Finally, the above is only the preferred embodiment of the utility model, the protection scope of the utility model is not only limited to the above-mentioned embodiment, and all technical schemes under the idea of the utility model belong to the protection scope of the utility model.
[0035] It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the principle of the utility model, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the utility model.
Claims
1. A rapid pressure and leak testing device for an electrolytic cell, comprising an electrolytic cell and a gas supply mechanism, characterized in that: The electrolytic cell is located in a first water tank. An air inlet pipe is connected to one side of the electrolytic cell, and an alkali circulation device is connected to the other side of the electrolytic cell, located on both sides of the ion exchange membrane in the electrolytic cell. The first water tank is filled with water, submerging the electrolytic cell. The air supply mechanism is connected to the air inlet pipe. The first water tank has a first observation window facing the electrolytic cell to observe any leakage. The alkali circulation device has a connecting pipe connected to the first water tank, and this connecting pipe has a second observation window for observing any leakage of the ion exchange membrane in the electrolytic cell.
2. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 1, characterized in that: The alkali circulation device includes a second water tank and a circulation pump. The second water tank is filled with alkali solution. The inlet end of the circulation pump is connected to the outlet end of the second water tank. An alkali solution inlet is provided on one side of the electrolytic cell, and the outlet end of the circulation pump is connected to the alkali solution inlet. A reflux port is also provided on the same side of the electrolytic cell, and the reflux port is connected to the second water tank.
3. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 2, characterized in that: The alkali inlet and the reflux outlet are located on the anode side of the electrolytic cell.
4. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 2, characterized in that: The second observation window is located in the second water tank, and the connecting pipe is connected between the return port and the second water tank.
5. The rapid pressure and leak testing device for an electrolytic cell according to claim 2, characterized in that: The alkali circulation device further includes a first electric heater, which is located in the second water tank and is used to heat the alkali solution in the second water tank.
6. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 5, characterized in that: The first water tank is equipped with a second electric heater, which is used to heat the liquid in the first water tank.
7. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 6, characterized in that: The first water tank is equipped with a first temperature sensor, and the second water tank is equipped with a second temperature sensor.
8. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 1, characterized in that: The gas supply mechanism includes a gas supply cylinder filled with nitrogen or hydrogen, and the gas supply cylinder is connected to the gas inlet pipeline.
9. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 8, characterized in that: The air intake pipeline includes a rigid pipe and a flexible pipe. An air inlet is provided on the cathode side of the electrolytic cell. The air inlet is connected to the flexible pipe, which is connected to the rigid pipe. The rigid pipe is connected to the gas supply cylinder. An air supply valve, a pressure relief valve, and a pressure gauge are provided on the rigid pipe.
10. The rapid pressure testing and leak testing device for an electrolytic cell according to claim 2, characterized in that: It also includes an electrolytic cell clamping device, which includes a support rod at one end and two hydraulic rods at the other end. The support rod at one end is fixed to one side inside the first water tank and abuts against one end of the electrolytic cell. The two hydraulic rods at the other end are installed on the other side of the second water tank and can abut against the other end of the electrolytic cell.