EDI device for hydrogen production of AEM electrolytic cell

Abstract

The utility model belongs to the technical field of electrolytic bath hydrogen production, and particularly discloses an EDI device for AEM electrolytic bath hydrogen production, which comprises an electrolytic bath, an AEM membrane block is arranged in the electrolytic bath, a fixing rod is fixedly connected to the bottom of the inner wall of the electrolytic bath, a sliding frame is slidably connected to the outer surface of the fixing rod, a spring is arranged at the bottom of the sliding frame, and the AEM membrane block is fixedly connected to the inner wall of the electrolytic bath. A springback plate is arranged at the bottom of the spring, and a driving mechanism for enabling the springback plate to continuously swing back is arranged on the electrolytic bath. According to the EDI device for hydrogen production of the AEM electrolytic cell, the springback plate can continuously and longitudinally springback and stir in the electrolyte through the driving mechanism, and the springback and stir can damage a fixed boundary layer structure between the electrolyte and the surface of the electrode, so that a boundary layer becomes thinner, ion transmission is facilitated, and the service life of the EDI device is prolonged. Therefore, the transmission rate of ions between the electrolyte and the surface of the electrode is accelerated, the polarization phenomenon can be reduced, and the overall electrolysis efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production by electrolyzer, and specifically to an EDI device for hydrogen production by AEM electrolyzer. Background Art

[0002] The AEM electrolyzer hydrogen production EDI device is a device for preparing hydrogen. It uses a combination of ion exchange membranes (usually anion exchange membranes) and electronic deionization (EDI) technology. It can efficiently produce high-purity hydrogen while reducing ionic impurities in water, making the hydrogen higher in quality. It has broad application prospects in the fields of renewable energy production and hydrogen energy technology.

[0003] In the hydrogen production process, the existing EDI device directly electrolyzes the electrolyte in the electrolyzer to produce hydrogen. Considering the thick diffusion layer (i.e., boundary layer) between the electrolyte and the electrode surface, the material transport therein is limited by the diffusion rate. During the electrolysis process, the existence of the boundary layer will lead to polarization, limit the ion transport rate, and thus affect the electrolysis efficiency. Utility Model Content

[0004] In view of this, the purpose of the present invention is to solve the shortcomings existing in the background technology and to propose an EDI device for producing hydrogen in an AEM electrolyzer to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the utility model provides an EDI device for producing hydrogen using an AEM electrolyzer, comprising an electrolyzer, an AEM membrane block is arranged inside the electrolyzer, a fixing rod is fixedly connected to the bottom of the inner wall of the electrolyzer, a slide is slidably connected to the outer surface of the fixing rod, a spring is arranged at the bottom of the slide, a rebound plate is arranged at the bottom of the spring, and a driving mechanism for allowing the rebound plate to swing continuously is arranged on the electrolyzer. In the electrolyzer, the AEM membrane block (anion exchange membrane) decomposes water into hydrogen ions (H+) and hydroxide ions (OH-), and the AEM membrane selectively allows hydrogen ions to pass through and prevents hydroxide ions from passing through.

[0006] Preferably, the driving mechanism comprises a fixing frame fixedly connected to the top of the electrolytic cell, and a U-shaped plate is fixedly connected to the outer surface of the fixing frame. The rebound plate can be driven by the driving mechanism to swing back and forth in the vertical direction.

[0007] Preferably, a motor is fixedly mounted on the fixed frame, a turntable is fixedly connected to the output end of the motor, and a guide shaft is fixedly connected to the outer surface of the turntable.

[0008] Preferably, the outer surface of the fixing frame is fixedly connected to a fixing shaft, the outer surface of the fixing shaft is rotatably connected to a swing bar, the outer surface of the swing bar is provided with a guide bar hole, and the inner side of the guide bar hole is slidably connected to the outer surface of the guide shaft.

[0009] Preferably, one end of the swing bar away from the fixed axis is rotatably connected to a first end shaft, and an outer surface of the first end shaft is rotatably connected to an end bar.

[0010] Preferably, the inner surface of the U-shaped plate is slidably connected to a slide bar, and the bottom of the slide bar is fixedly connected to the top of the slide, the outer surface of the slide bar is fixedly connected to a second end shaft, and the outer surface of the second end shaft is rotatably connected to an end of the end bar away from the first end shaft.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The EDI device for hydrogen production in an AEM electrolyzer can make the rebound plate continuously rebound and move longitudinally in the electrolyte through a driving mechanism. This rebound movement can destroy the fixed boundary layer structure between the electrolyte and the electrode surface, making the boundary layer thinner, which is conducive to the transmission of ions, thereby accelerating the transmission rate of ions between the electrolyte and the electrode surface, thereby reducing the occurrence of polarization and improving the overall electrolysis efficiency.

[0013] 2. In the EDI device for hydrogen production of AEM electrolyzer, the repeated rebounding and flicking of the rebound plate will produce the effect of liquid flow and disturbance, effectively breaking the static state of the electrolyte. This disturbance can fully mix the solutes with higher or lower local concentrations, promote the uniform distribution of solutes in the electrolyte, and increase the contact surface area between the electrolyte and the inner surface of the electrolyzer, which helps to improve the mass transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the internal structure of the electrolytic cell of this application;

[0016] Figure 3 This is a schematic diagram of the surface structure of the fixing frame of this application.

[0017] Among them: 1. electrolytic cell; 2. AEM membrane block; 3. fixed rod; 4. slide; 5. spring; 6. rebound plate; 7. fixed frame; 8. U-shaped plate; 9. motor; 10. turntable; 11. guide shaft; 12. fixed shaft; 13. swing bar; 14. guide bar hole; 15. first end shaft; 16. end bar; 17. slide bar; 18. second end shaft. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] See also Figure 1-3 An EDI device for producing hydrogen using an AEM electrolyzer comprises an electrolyzer 1, an AEM membrane block 2 is arranged inside the electrolyzer 1, a fixing rod 3 is fixedly connected to the bottom of the inner wall of the electrolyzer 1, a slide 4 is slidably connected to the outer surface of the fixing rod 3, a spring 5 is arranged at the bottom of the slide 4, a rebound plate 6 is arranged at the bottom of the spring 5, and a driving mechanism for allowing the rebound plate 6 to continuously swing back is arranged on the electrolyzer 1.

[0020] Through the above technical solution, when the device is in use, the electrolyte is placed in the electrolytic cell 1. With the help of the AEM membrane block 2, the electronic deionization technology (EDI) is used to further treat the water. The EDI technology uses ion exchange resin to remove ionic impurities in the water, including various cations and anions, to ensure that the generated hydrogen has a high purity. During this process, the rebound plate 6 can be driven by a driving mechanism to swing back and forth longitudinally in the electrolyte.

[0021] Specifically, the driving mechanism includes a fixing frame 7 fixedly connected to the top of the electrolytic cell 1 , and a U-shaped plate 8 is fixedly connected to the outer surface of the fixing frame 7 .

[0022] Through the above technical solution, the U-shaped plate 8 plays a role in limiting the relative position of the slide bar 17, so that the slide bar 17 moves up and down along a fixed track.

[0023] Specifically, a motor 9 is fixedly mounted on the fixing frame 7 , a turntable 10 is fixedly connected to the output end of the motor 9 , and a guide shaft 11 is fixedly connected to the outer surface of the turntable 10 .

[0024] Through the above technical solution, when the guide shaft 11 makes a circular motion with the turntable 10 , it drives the swing bar 13 through the guide bar hole 14 .

[0025] Specifically, the outer surface of the fixed frame 7 is fixedly connected to the fixed shaft 12, the outer surface of the fixed shaft 12 is rotatably connected to the swing bar 13, the outer surface of the swing bar 13 is provided with a guide bar hole 14, and the inner side of the guide bar hole 14 is slidably connected to the outer surface of the guide shaft 11.

[0026] Through the above technical solution, after the swing bar 13 is driven by the guide shaft 11 , it will rotate along the fixed shaft 12 at a certain angle.

[0027] Specifically, one end of the swing bar 13 away from the fixed shaft 12 is rotatably connected to the first end shaft 15 , and the outer surface of the first end shaft 15 is rotatably connected to the end bar 16 .

[0028] Through the above technical solution, the swing of the pendulum bar 13 can be converted into the up and down movement of the slide bar 17 through the end bar 16.

[0029] Specifically, the inner surface of the U-shaped plate 8 is slidably connected with a slide bar 17, and the bottom of the slide bar 17 is fixedly connected to the top of the slide 4, the outer surface of the slide bar 17 is fixedly connected with a second end shaft 18, and the outer surface of the second end shaft 18 is rotatably connected to an end of the end bar 16 away from the first end shaft 15.

[0030] Through the above technical solution, when the slide bar 17 moves up and down along the U-shaped plate 8, the slide 4 will slide up and down along the fixed rod 3. During this process, the rebound plate 6 will swing to a certain extent under the action of the spring 5.

[0031] Working principle: During the hydrogen production process, the device takes into account a thick diffusion layer (i.e., boundary layer) between the electrolyte and the electrode surface, in which the material transfer is limited by the diffusion rate. During the electrolysis process, the existence of the boundary layer will lead to polarization, limiting the ion transfer rate. Therefore, a driving mechanism is designed, that is, the motor 9 is turned on to drive the turntable 10 to rotate. During the circular motion of the turntable 10, the guide shaft 11 will slide along the guide bar hole 14, and drive the pendulum bar 13 through the guide bar hole 14, so that the pendulum bar 13 rotates a certain angle along the fixed shaft 12. During the swinging process, the end of the pendulum bar 13 away from the fixed shaft 12 will drive the slide bar 17 through the end bar 16, so that the slide bar 17 slides up and down along the U-shaped plate 8, and then links the slide frame 4 to make it move along the fixed rod 3 Sliding up and down, the slide 4 will swing the rebound plate 6 back and forth through the spring 5 during the up and down movement, so that the rebound plate 6 will continuously rebound and move under the trend of the water flow. The rebound and movement of the rebound plate 6 can destroy the fixed boundary layer structure between the electrolyte and the electrode surface. This destructive effect is caused by stirring and the shear force disturbance of the liquid flow. When the boundary layer is disturbed, the originally fixed diffusion layer structure will be broken, and the substances in the boundary layer will be more evenly dispersed in the electrolyte, thereby making the boundary layer thinner. A thinner boundary layer is beneficial to the transmission of ions, because ions are no longer restricted by the thicker boundary layer. Ions can more easily pass through the thinned boundary layer and quickly reach the electrode surface to participate in the electrolysis reaction, which can reduce the occurrence of polarization and improve the electrolysis efficiency.

[0032] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An EDI device for producing hydrogen from an AEM electrolyzer, comprising an electrolyzer (1), characterized in that: An AEM membrane block (2) is arranged inside the electrolytic cell (1), a fixed rod (3) is fixedly connected to the bottom of the inner wall of the electrolytic cell (1), a slide (4) is slidably connected to the outer surface of the fixed rod (3), a spring (5) is arranged at the bottom of the slide (4), a rebound plate (6) is arranged at the bottom of the spring (5), and a driving mechanism for allowing the rebound plate (6) to swing back continuously is arranged on the electrolytic cell (1).

2. The EDI device for producing hydrogen in an AEM electrolyzer according to claim 1, characterized in that: The driving mechanism comprises a fixing frame (7) fixedly connected to the top of the electrolytic cell (1), and a U-shaped plate (8) is fixedly connected to the outer surface of the fixing frame (7).

3. The EDI device for producing hydrogen in an AEM electrolyzer according to claim 2, characterized in that: A motor (9) is fixedly mounted on the fixed frame (7), a rotating disk (10) is fixedly connected to the output end of the motor (9), and a guide shaft (11) is fixedly connected to the outer surface of the rotating disk (10).

4. The EDI device for producing hydrogen in an AEM electrolyzer according to claim 3, characterized in that: The outer surface of the fixed frame (7) is fixedly connected to a fixed shaft (12), the outer surface of the fixed shaft (12) is rotatably connected to a swing bar (13), the outer surface of the swing bar (13) is provided with a guide bar hole (14), and the inner side of the guide bar hole (14) is slidably connected to the outer surface of the guide shaft (11).

5. The EDI device for producing hydrogen in an AEM electrolyzer according to claim 4, characterized in that: One end of the swing bar (13) away from the fixed shaft (12) is rotatably connected to a first end shaft (15), and the outer surface of the first end shaft (15) is rotatably connected to an end bar (16).

6. The EDI device for producing hydrogen in an AEM electrolyzer according to claim 5, characterized in that: The inner surface of the U-shaped plate (8) is slidably connected to a slide bar (17), and the bottom of the slide bar (17) is fixedly connected to the top of the slide frame (4); the outer surface of the slide bar (17) is fixedly connected to a second end shaft (18), and the outer surface of the second end shaft (18) is rotatably connected to an end of the end bar (16) away from the first end shaft (15).

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