Durability testing device for bubble flow impact diaphragm

Abstract

The utility model discloses a durability testing device for a bubble flow impact diaphragm, and belongs to the technical field of testing devices, the durability testing device comprises a transparent water tank capable of containing water and an air compressor, a diaphragm fixing groove is arranged in the transparent water tank, and a composite diaphragm can be horizontally fixed on the diaphragm fixing groove; a pipeline can be connected and communicated with an air outlet of the air compressor, the other end of the pipeline can stretch into the transparent water tank, an air outlet needle tube head is fixedly arranged at the end, away from the air compressor, of the pipeline and located below the composite diaphragm, and a gas flow meter is arranged on the pipeline. According to the durability testing device for the bubble flow impact diaphragm provided by the utility model, the process that the composite diaphragm is impacted by bubbles can be visualized, meanwhile, the testing cost can be reduced, and the testing time can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a durability testing device for a bubble flow impacting a diaphragm. Background Technique

[0002] The composite diaphragm is the core component of alkaline water electrolysis for hydrogen production, playing an important role in blocking hydrogen and oxygen and establishing an ion transport path in an alkaline electrolyzer. The domestic composite diaphragms currently under research have problems such as easy disintegration and peeling of the coating, and easy generation of notches on the membrane surface and edges in the application scenarios of domestic large-scale pressurized alkaline electrolyzers and sprayed electrodes, which affect the safe operation of the electrolyzer. Therefore, based on a full understanding of the system and the operating environment of the electrolyzer, it is necessary to break through the reliability and durability problems of the composite diaphragm, move from domestic substitution to international leading comprehensive performance. Among the durability problems, the key is that when a large current density / current density non-uniformity appears in the electrolyzer, a large number of bubbles will be generated locally in the electrolyzer. The rupture and coalescence of the bubbles cause cavitation effects, impacting the skeleton and powder of the composite diaphragm, and the high-flow electrolyte and bubbles will exacerbate this process, leading to the failure of the composite diaphragm. The insoluble substances impacted will further block the valve pipelines of the electrolyzer, etc. In traditional electrolyzers, due to the coupling effect between internal components, it is very difficult to visualize the process of the large amount of hydrogen and oxygen bubbles generated during the reaction impacting the composite diaphragm to deeply understand the mechanism, and it is very expensive and time-consuming to laterally evaluate the durability of the composite diaphragm impacted by bubbles in an alkaline electrolyzer. Content of the Utility Model

[0003] The purpose of the utility model is to provide a durability testing device for a bubble flow impacting a diaphragm to solve the problems existing in the above-mentioned prior art, which can visualize the process of the composite diaphragm being impacted by bubbles, and at the same time can reduce the testing cost and save the testing time.

[0004] To achieve the above purpose, the utility model provides the following scheme:

[0005] The utility model provides a durability testing device for a bubble flow impacting a diaphragm, including a transparent water tank capable of containing water and an air compressor. A membrane fixing groove is arranged inside the transparent water tank, and a composite diaphragm can be horizontally fixed on the membrane fixing groove; a pipeline can be connected and communicated with the air outlet of the air compressor, and the other end of the pipeline can extend into the transparent water tank. An air outlet needle tube head is fixedly arranged at the end of the pipeline far away from the air compressor, and the air outlet needle tube head is located below the composite diaphragm, and a gas flowmeter is arranged on the pipeline.

[0006] Preferably, a clamping groove is arranged at the bottom of the membrane fixing groove, and the air outlet needle tube head can be clamped in the clamping groove.

[0007] Preferably, pipeline clamps capable of fixing the pipeline are arranged on the inner wall of the transparent water tank.

[0008] Preferably, the pipeline is a PUG pipe.

[0009] Preferably, a first magnetic attraction assembly is fixedly arranged on the membrane fixing groove, and the second magnetic attraction assembly can cooperate with the first magnetic attraction assembly to fix the composite diaphragm on the membrane fixing groove.

[0010] Preferably, the transparent water tank is made of an acrylic board.

[0011] The utility model has achieved the following technical effects compared with the prior art:

[0012] For the durability test device for bubble flow impacting a diaphragm provided by the utility model, by adopting a non-in-situ diaphragm impact device, the impact of the composite diaphragm by bubbles under adjustable pressure can be visually observed, and the mechanism and process of the impact and detachment of pure bubbles on the composite diaphragm can be disassembled singly. Conventionally, when observing the impact of hydrogen and oxygen bubbles on the composite diaphragm during the internal operation of an electrolytic cell, it is necessary to spend an expensive cost to make a transparent electrolytic cell, and the cost is high. Moreover, it is time-consuming to further analyze the mass loss of the composite diaphragm after being impacted by bubbles and the mechanism of the composite diaphragm being impacted and detached. Therefore, observing the impact of the composite diaphragm by bubbles through the durability test device for bubble flow impacting a diaphragm can well save the test cost and test time. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of the durability test device for bubble flow impacting a diaphragm provided by the present utility model;

[0015] Figure 2 For Figure 1 The partial enlarged structural view of part A in

[0016] In the figure: 1 - transparent water tank; 2 - membrane fixing groove; 3 - pipeline; 4 - gas flowmeter; 5 - pipeline clamp; 6 - composite diaphragm; 7 - adapter. Detailed Embodiments

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] The purpose of the present invention is to provide a durability test device for a bubble flow to impact a diaphragm, so as to solve the problems existing in the prior art, enable the visualization of the process of the composite diaphragm being impacted by bubbles, and at the same time reduce the test cost and save the test time.

[0019] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The present invention provides a durability test device for a bubble flow to impact a diaphragm. As Figures 1 - 2 shown, in this embodiment, it includes a transparent water tank 1 capable of containing water and an air compressor with adjustable pressure. The air compressor is preferably an air pump. Inside the transparent water tank 1, there is a membrane fixing groove 2, and the composite diaphragm 6 can be horizontally fixed on the membrane fixing groove 2; a pipeline 3 can be connected and communicated with the air outlet of the air compressor, and the other end of the pipeline 3 can extend into the transparent water tank 1. An air outlet needle tube head is fixedly arranged at the end of the pipeline 3 away from the air compressor, and the air outlet needle tube head is located below the composite diaphragm 6. A gas flowmeter 4 is arranged on the pipeline 3, and both between the pipeline 3 and the air compressor and between the pipeline 3 and the gas flowmeter 4 are connected and communicated through adapters.

[0021] In one embodiment, a clamping groove is provided at the bottom of the membrane fixing groove 2, and the air outlet needle tube head can be vertically clamped in the clamping groove, and the air outlet needle tube head can be directly opposite to the composite diaphragm 6. The air outlet needle tube head is preferably an air outlet fine needle tube head.

[0022] In one embodiment, a pipeline clamp 5 capable of fixing the pipeline 3 is provided on the inner wall of the transparent water tank 1. By setting the pipeline clamp 5, it is possible to prevent the pipeline 3 from shaking back and forth during the air injection process of the air compressor, thereby improving the stability of the device operation.

[0023] In one embodiment, the pipeline 3 is a PUG pipe, preferably a PUG flexible pipe.

[0024] In one embodiment, a first magnetic attraction component is fixedly arranged on the membrane fixing groove 2. During use, the composite diaphragm 6 is placed on the membrane fixing groove 2, and then the second magnetic attraction component is placed on the composite diaphragm 6, so that the composite diaphragm 6 is located between the first magnetic attraction component and the membrane fixing groove 2. The second magnetic attraction component and the first magnetic attraction component cooperate to fix the composite diaphragm 6 on the membrane fixing groove 2. Both the first magnetic attraction component and the second magnetic attraction component are preferably magnets.

[0025] In one embodiment, the transparent water tank 1 is made of an acrylic board, which has a low manufacturing cost, high transparency, and good heat resistance, and can meet the test requirements.

[0026] The durability test device for bubble flow impacting the diaphragm provided by the present utility model, the installation process and the use method include the following steps:

[0027] Step 1. Prepare the composite diaphragm 6 and the membrane fixing groove 2: Fix the composite diaphragm 6 on the membrane fixing groove 2 by a magnet to ensure that the membrane is stable and does not move.

[0028] Step 2. Set the transparent water tank 1 and fill it with water: Place the membrane fixing groove 2 with the composite diaphragm 6 fixed in the acrylic board water tank, and inject water into the acrylic board water tank until the membrane fixing groove 2 is completely submerged.

[0029] Step 3. Connect the hose and the air pump: Fix the air outlet head of the PUG hose into the fine needle tube head to ensure a tight connection. Then connect the other end of the PUG hose to the 1 - 15 L / min flow rate gas flowmeter 4 through a connector, and also connect the other end of the gas flowmeter 4 to the PUG hose through a connector. Then connect the PUG hose to the air pump through a connector 7 to ensure smooth air flow.

[0030] Step 4. Fix the PUG hose and start the experiment: Vertically place the air outlet fine needle tube head fixed at the end of the PUG hose into the transparent water tank 1 and fix it at the bottom card slot of the membrane fixing groove 2. Then use the pipeline clamp 5 to clamp the PUG hose in the transparent water tank 1 to ensure that the PUG hose does not move during the experiment.

[0031] Step 5. Turn on the air pump and adjust the flow rate: Turn on the air pump to start air flow impact, and adjust the gas flow rate through the gas flowmeter 4. Initially, the flow rate can be set to 10 L / min.

[0032] Step 6. Conduct the bubble flow impact experiment: Conduct non - in - situ bubble flow impact on the composite diaphragm 6 on the membrane fixing groove 2 for a duration of 100 h, 200 h, 300 h, etc., and adjust according to the experimental needs.

[0033] Step 7. Observe and record the experimental process: During the impact process, visually observe the process of the composite diaphragm 6 being impacted by bubble flows with different flow rates through the transparent acrylic plate water tank;

[0034] Step 8. Analyze the experimental results: After the experiment, analyze the composition of the water in the transparent water tank 1 to understand the detachment mechanism and detached substances of the composite diaphragm 6 after being impacted by bubbles, and compare the masses of the composite diaphragm 6 before and after the impact to characterize its mass loss.

[0035] Through this non-in-situ diaphragm impact device, the situation of the composite diaphragm 6 being impacted by bubbles under adjustable pressure can be visually observed. The mechanism and process of the impact detachment of pure bubbles on the composite diaphragm 6 can be disassembled individually. Conventionally, when observing the composite diaphragm 6 being impacted by hydrogen and oxygen bubbles during the internal operation of the electrolytic cell, it is necessary to spend an expensive cost to make a transparent electrolytic cell, which is costly. Moreover, it is time-consuming to further analyze the mass loss of the composite diaphragm 6 after being impacted by bubbles and the detachment mechanism of the composite diaphragm 6 being impacted and detached. Therefore, the bubble flow impact diaphragm durability test device provided in this embodiment for observing the composite diaphragm 6 being impacted by bubbles can well save the test cost and test time.

[0036] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A durability test device for bubble flow impacting a diaphragm, characterized in that: include: A transparent water tank capable of containing water, wherein a membrane fixing groove is provided inside the transparent water tank, and a composite diaphragm can be horizontally fixed on the membrane fixing groove; And an air compressor, a pipeline can be connected and communicated with the air outlet of the air compressor, the other end of the pipeline can extend into the transparent water tank, an air outlet needle head is fixedly provided at the end of the pipeline away from the air compressor, the air outlet needle head is located below the composite diaphragm, and a gas flow meter is provided on the pipeline.

2. The device for testing the durability of a bubble flow impacting a diaphragm according to claim 1, characterized in that: A clamping groove is provided at the bottom of the membrane fixing groove, and the air outlet needle head can be clamped in the clamping groove.

3. The device for testing the durability of a bubble flow impacting a diaphragm according to claim 1, characterized in that: A pipeline clamp capable of fixing the pipeline is arranged on the inner wall of the transparent water tank.

4. The device for testing the durability of a bubble flow impacting a diaphragm according to claim 1, characterized in that: The pipeline is a PUG tube.

5. The device for testing the durability of a bubble flow impacting a diaphragm according to claim 1, characterized in that: The membrane fixing groove is fixedly provided with a first magnetic attraction component, and the second magnetic attraction component cooperates with the first magnetic attraction component to fix the composite diaphragm on the membrane fixing groove.

6. The device for testing the durability of a bubble flow impacting a diaphragm according to claim 1, characterized in that: The transparent water tank is made of acrylic plate.

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