Single-grid model of anode chamber of ionic membrane electrolytic cell

Abstract

The invention provides an ionic membrane electrolytic cell anode chamber single grid model, and relates to the technical field of ionic membrane electrolytic cells, the ionic membrane electrolytic cell anode chamber single grid model comprises a cuboid model main body, the model main body is internally provided with a cavity, the top of the model main body is provided with a gas-liquid outlet, and the gas-liquid outlet is communicated with the cavity; the front side of the cavity is an anode surface, and the rear side is a tank body surface; the gas-liquid separation box is connected to the top of the model main body and is communicated with the gas-liquid outlet; the liquid distribution pipe is detachably arranged at the lower part of the cavity, a spraying hole is formed in the liquid distribution pipe, and the spraying angle of the spraying hole is adjustable; and the flow guide plate is arranged in the cavity and is obliquely arranged. Through the single-grid model of the anode chamber of the ionic membrane electrolytic cell, the influence of the flow velocity of electrolyte near an anode surface, the size of small holes in a liquid distribution pipe and the spraying angle on the gas phase distribution uniformity can be researched or demonstrated in scenes such as a laboratory.

Description

Technical Field

[0001] This invention relates to the field of ion-exchange membrane electrolyzer technology, and in particular to a single-grid model of the anode chamber of an ion-exchange membrane electrolyzer. Background Technology

[0002] The ion-exchange membrane electrolyzer includes an anode chamber, a cathode chamber, and an ion-exchange membrane. The anode chamber is composed of multiple identical grid structures arranged in parallel. The lower part of the anode chamber has a liquid distribution pipe. The electrolyte is sprayed upward from small holes in the liquid distribution pipe and flows through the anode plate to form a gas-liquid mixture. The gas and liquid in the gas-liquid mixture enter the gas-liquid separation box above and are then separated and discharged.

[0003] During the flow of electrolyte in the anode chamber, reducing the flow dead zone near the surface of the anode plate can effectively improve the uniformity of gas phase distribution. Uneven gas phase distribution will affect the uniformity of current density distribution, and thus affect electrolysis efficiency.

[0004] The dead zone in the region near the anode plate surface is affected by the flow velocity of the electrolyte on the anode plate surface, the size of the orifices on the distribution pipe, and the injection angle. The purpose of this application is to design a single-grid model of the anode chamber of an ion-exchange membrane electrolyzer to study or demonstrate the influence of the flow velocity of the electrolyte on the anode plate surface, the size of the orifices on the distribution pipe, and the injection angle on the uniformity of gas phase distribution. Summary of the Invention

[0005] In view of the above situation, the present invention provides a single grid model of the anode chamber of an ion-exchange membrane electrolyzer, which aims to design a single grid model of the anode chamber of an ion-exchange membrane electrolyzer to study or demonstrate the influence of the flow velocity of the electrolyte on the anode plate surface, the size of the small holes on the liquid distribution pipe and the injection angle on the uniformity of the gas phase distribution.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a single-grid model of the anode chamber of an ion-exchange membrane electrolyzer, comprising: The main body of the model is rectangular and has a cavity inside. The top of the main body of the model has a gas-liquid outlet, which is connected to the cavity. The front side of the cavity is the anode surface, and the rear side is the tank surface. The gas-liquid separation box is connected to the top of the model body and is connected to the gas-liquid outlet; The liquid distribution pipe is detachably arranged in the lower part of the cavity. The liquid distribution pipe has spray holes with adjustable spray angle. The baffle plate is installed inside the cavity and is tilted.

[0007] In some embodiments of the present invention, the lateral distance between the upper end of the guide plate and the anode surface is 10 mm, and the lateral distance between the lower end of the guide plate and the tank surface is 7 mm.

[0008] In some embodiments of the present invention, the liquid distribution tube is inserted laterally into the model body, and the liquid distribution tube is fastened to the model body by a fastening assembly.

[0009] In some embodiments of the present invention, the outer wall of the left part of the liquid distribution tube has a flange and the outer wall of the right part has a shoulder. The right side of the flange is used to seal against the outer wall of the model body, and the shoulder is located inside the cavity. The right side of the shoulder is used to seal against the inner wall of the cavity.

[0010] In some embodiments of the present invention, the fastening assembly includes: The fixing cylinder is fixed to the outer right side of the model body and sleeved on the outer right side of the liquid distribution pipe; The movable sleeve has its inner side threadedly connected to the outer side of the fixed cylinder; The extension frame is fastened to the outer right side of the liquid distribution tube, and the left side of the extension frame can be pressed into contact with the right end of the movable sleeve.

[0011] In some embodiments of the present invention, the right end of the movable sleeve has a plurality of spherical protrusions distributed in a ring.

[0012] In some embodiments of the present invention, a scale plate is provided on the right side of the model body, and an extension frame is connected to a pointer, which is used in conjunction with the scale plate.

[0013] In some embodiments of the present invention, three spray holes are distributed from left to right on the liquid distribution pipe, and the three spray holes are of different sizes; an adjusting column is slidably and sealed inside the liquid distribution pipe, with the left end of the adjusting column open and the right end closed, and a connecting port is provided on the side wall of the adjusting column, which extends along the circumferential direction of the adjusting column and can be aligned and connected with one of the three spray holes.

[0014] In some embodiments of the present invention, a rotary joint is connected to the left end of the liquid distribution pipe; an extension rod is connected to the right end of the adjusting column, and the right end of the extension rod is located outside the liquid distribution pipe.

[0015] In some embodiments of the present invention, the extension rod has three annular grooves distributed on it, and the lateral spacing between the three annular grooves matches the lateral spacing between the three injection holes; an elastic rod is provided above the extension rod, the elastic rod is installed at the right end of the liquid distribution pipe, and the lower end of the elastic rod can extend into a certain annular groove.

[0016] The embodiments of the present invention have at least the following advantages or beneficial effects: The single-grid model of the anode chamber of an ion-exchange membrane electrolyzer allows for the study or demonstration in laboratory settings of the effects of electrolyte flow velocity near the anode surface, orifice size on the distribution pipe, and injection angle on the uniformity of gas phase distribution.

[0017] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the single-grid model of the anode chamber of the ion-exchange membrane electrolyzer in Example 1; Figure 2 This is a schematic diagram of the injection angle α of the injection hole; Figure 3 This is a schematic diagram of the injection hole structure; Figure 4 This is a schematic diagram of the fastening components, adjusting column, pointer, etc. in Example 2; Figure 5 for Figure 4 A magnified view of a portion of position A in the middle; Figure 6 for Figure 4 A magnified view of the area at position B in the middle.

[0020] icon: 1-Model body, 11-Cavity, 12-Gas-liquid outlet, 13-Anode surface, 14-Tank surface, 2-Gas-liquid separation box, 3-Liquid distribution pipe, 31-Injection hole, 32-Flange, 33-Shoulder 4-Guide plate, 51-Fixed cylinder, 52-Modible sleeve, 521-Spherical protrusion, 53-Extension frame, 6-Adjusting column, 61-Connecting port, 62-Extension rod, 621-Annular groove, 7-Rotary joint, 8-Elastic rod, 91-Scale plate, 92-Pointer. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are presented briefly. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention.

[0022] In the description of the embodiments of the present invention, it should be understood that the terms "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0023] Furthermore, the term "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0025] The embodiments of the present invention will be described in detail below.

[0026] Example 1

[0027] See Figures 1-3 This embodiment provides a single-grid model of the anode chamber of an ion-exchange membrane electrolyzer, including a model body 1, a gas-liquid separation box 2, a liquid distribution pipe 3, and a guide plate 4.

[0028] The main body of the model 1 is rectangular, with overall dimensions (excluding the gas-liquid separation box 2) of 92mm in length, 33mm in width, and 1158mm in height. The main body of the model 1 contains a cavity 11, and the top of the main body of the model 1 has a gas-liquid outlet 12, which is connected to the cavity 11. The front side of the cavity 11 is the anode surface 13 (simulating the anode plate of an ion-exchange membrane electrolyzer), and the rear side is the tank surface 14 (simulating the tank body of an ion-exchange membrane electrolyzer).

[0029] The gas-liquid separation box 2 is connected to the top of the model body 1 and communicates with the gas-liquid outlet 12. The gas-liquid separation box 2 has a gas phase outlet and a liquid phase outlet.

[0030] The liquid distribution pipe 3 is detachably arranged in the lower part of the cavity 11. The liquid distribution pipe 3 has a spray hole 31, and the spray angle of the spray hole 31 is adjustable. The electrolyte enters from one end of the liquid distribution pipe 3 and is sprayed out from the spray hole 31 into the cavity 11.

[0031] The guide plate 4 is installed inside the cavity 11 and is inclined. The lateral distance between the upper end of the guide plate 4 and the anode surface 13 is 10mm, and the lateral distance between the lower end of the guide plate 4 and the tank surface 14 is 7mm. The guide plate 4 can be fixed to the inner wall of the cavity.

[0032] When studying or demonstrating the effect of electrolyte flow velocity on the uniformity of gas phase distribution near the anode surface 13, the cross-sectional area of ​​the fluid channel between the upper end of the guide plate 4 and the anode surface 13, and between the lower end of the guide plate 4 and the tank surface 14, is reduced by setting the guide plate 4. According to the law of conservation of momentum, a smaller cross-sectional area means a larger velocity. That is, by increasing the flow velocity near the anode surface 13, the flow dead zone is reduced and the uniformity of gas phase distribution near the anode surface 13 is improved. By increasing the flow velocity near the tank surface 14, a portion of the electrolyte circulates within the cavity 11 (while the other portion of the electrolyte enters the gas-liquid separation box 2).

[0033] When studying or demonstrating the effect of the size of the injection hole 31 on the liquid distribution pipe 3 on the uniformity of gas phase distribution, liquid distribution pipes 3 with different injection hole 31 sizes can be installed in the lower part of the cavity 11.

[0034] When studying or demonstrating the effect of the injection angle of the injection hole 31 on the liquid distribution pipe 3 on the uniformity of gas phase distribution, the orientation of the injection hole 31 on the liquid distribution pipe 3 can be adjusted.

[0035] The single-grid model of the anode chamber of the ion-exchange membrane electrolyzer described above allows for the study or demonstration in laboratory settings of the effects of electrolyte flow velocity near the anode surface 13, orifice size on the distribution pipe 3, and injection angle on the uniformity of gas phase distribution. Changing the orifice size and injection angle on the distribution pipe 3 will affect the electrolyte flow velocity near the anode surface 13.

[0036] The diameter of the injection hole 31 is 1.8 mm, 2 mm, or 3 mm. Experiments have shown that, with other variables being equal, the gas phase distribution near the anode surface 13 is most uniform when the diameter of the injection hole 31 is 1.8 mm.

[0037] The injection angle α of the injection orifice 31 is 0°, -18°, or -22°. Experiments showed that, with other variables remaining constant, the gas phase distribution near the anode surface 13 exhibited the best uniformity when the injection angle α of the injection orifice 31 was -18°.

[0038] Conventional methods are used to measure electrolyte flow velocity and assess gas phase distribution uniformity: Electrolyte flow velocity can be quantified by installing common flow rate detection equipment. Common methods for assessing gas phase distribution uniformity include: 1. Direct observation: Observing the distribution of bubbles with the naked eye or using high-speed photography through a transparent model. 2. Measurement: Measuring gas concentration or pressure distribution using sensors at different locations (pressure fluctuations can indirectly reflect gas distribution). 3. Using tracers: Assessing uniformity by tracking gas distribution. 4. Indirect assessment based on electrochemical performance, as gas phase distribution uniformity affects current efficiency.

[0039] Example 2

[0040] One specific embodiment of the liquid distribution pipe 3 being detachably arranged in the lower part of the cavity 11 is as follows: See Figures 4-6 The liquid distribution pipe 3 is horizontally inserted into the model body 1, and the liquid distribution pipe 3 is fastened to the model body 1 by fastening components.

[0041] The liquid distribution pipe 3 has a flange 32 on the left outer wall and a shoulder 33 on the right outer wall. The right side of the flange 32 is used to seal and contact the outer wall of the model body 1. The shoulder 33 is located inside the cavity 11 of the model body 1. The right side of the shoulder 33 is used to seal and contact the inner wall of the cavity 11.

[0042] The fastening assembly includes a fixed sleeve 51, a movable sleeve 52, and an extension bracket 53.

[0043] The fixing cylinder 51 is fixed on the outer right side of the model body 1 and sleeved on the outer right side of the liquid distribution pipe 3.

[0044] The inner side of the movable sleeve 52 is threadedly connected to the outer side of the fixed sleeve 51.

[0045] The extension frame 53 is fastened to the outer right side of the liquid distribution pipe 3 by screws, and the left side of the extension frame 53 can be pressed into contact with the right end of the movable sleeve 52.

[0046] Twist the movable sleeve 52, and the movable sleeve 52 pushes the extension frame 53 to the right. The extension frame 53 drives the liquid distribution pipe 3 to move to the right, thereby fastening the liquid distribution pipe 3 to the model body 1.

[0047] To facilitate changing the size of the injection holes 31, three injection holes 31 are distributed from left to right on the liquid distribution pipe 3. The three injection holes 31 are of different sizes, for example, the diameters of the injection holes 31 from left to right are 1.8 mm, 2 mm, and 3 mm respectively. An adjusting column 6 is slidably and sealed inside the liquid distribution pipe 3. The left end of the adjusting column 6 is open and the right end is closed. A connecting port 61 is provided on the side wall of the adjusting column 6. The connecting port 61 extends along the circumferential direction of the adjusting column 6 and can be aligned and connected with one of the three injection holes 31.

[0048] The horizontal sliding adjustment column 6 is used to align the connecting port 61 with a certain spray hole 31, so that the other two spray holes 31 are not connected to the liquid distribution pipe 3. Thus, the size of the spray hole 31 connected to the liquid distribution pipe 3 can be easily changed without replacing the liquid distribution pipe 3.

[0049] To facilitate adjustment of the spray angle of the spray nozzle 31, a rotary joint 7 is connected to the left end of the liquid distribution pipe 3; an extension rod 62 is connected to the right end of the adjusting column 6, and the right end of the extension rod 62 is located outside the liquid distribution pipe 3; multiple spherical protrusions 521 are distributed in a ring on the right end of the movable sleeve 52, and the spherical protrusions 521 make point contact with the left side of the extension frame 53.

[0050] Based on the above-described installation method of the liquid distribution pipe 3, the liquid distribution pipe 3 can be rotated. By rotating the liquid distribution pipe 3, the spray angle of the spray nozzle 31 can be conveniently adjusted without disassembling the liquid distribution pipe 3. When rotating the liquid distribution pipe 3, the spherical protrusion 521 reduces the frictional resistance between the spherical protrusion 521 and the extension frame 53, making it more labor-saving.

[0051] Furthermore, the extension rod 62 has three annular grooves 621 distributed on it, and the lateral spacing between the three annular grooves 621 matches the lateral spacing between the three spray holes 31. An elastic rod 8 is provided above the extension rod 62, and the elastic rod 8 is installed at the right end of the liquid distribution pipe 3. The elastic rod 8 can extend and retract vertically, and its lower end can extend into one of the annular grooves 621. In this way, the cooperation of the annular grooves 621 and the elastic rod 8 can limit the left and right movement of the extension rod 62 and the adjusting column 6 after the relative position of the connecting port 61 and the three spray holes 31 is adjusted.

[0052] Furthermore, a scale plate 91 is provided on the right side of the model body 1, and an extension frame 53 is connected to a pointer 92. The pointer 92 works in conjunction with the scale plate 91 to indicate the rotation angle of the liquid distribution pipe 3, thereby more intuitively reflecting the spray angle of the spray hole 31 on the liquid distribution pipe 3.

[0053] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A single-grid model for the anode chamber of an ion-exchange membrane electrolyzer, characterized in that, include: The model body has a cavity inside, and the top of the model body has a gas-liquid outlet, which is connected to the cavity; the front side of the cavity is the anode surface, and the rear side is the tank surface. A gas-liquid separation box is connected to the top of the model body and communicates with the gas-liquid outlet; A liquid distribution pipe is detachably arranged in the lower part of the cavity. The liquid distribution pipe has spray holes with adjustable spray angles. A guide vane is disposed within the cavity and is inclined.

2. The single-grid model of the anode chamber of the ion-exchange membrane electrolyzer according to claim 1, characterized in that, The lateral distance between the upper end of the guide plate and the anode surface is 10mm, and the lateral distance between the lower end of the guide plate and the tank surface is 7mm.

3. The single-grid model of the anode chamber of the ion-exchange membrane electrolyzer according to claim 1, characterized in that, The liquid distribution tube is inserted laterally into the model body, and the liquid distribution tube is fastened to the model body by a fastening assembly.

4. The single-grid model of the anode chamber of the ion-exchange membrane electrolyzer according to claim 3, characterized in that, The liquid distribution tube has a flange on its left outer wall and a shoulder on its right outer wall. The right side of the flange is used to seal against the outer wall of the model body. The shoulder is located inside the cavity and the right side of the shoulder is used to seal against the inner wall of the cavity.

5. The single-grid model of the anode chamber of the ion-exchange membrane electrolyzer according to claim 4, characterized in that, The fastening assembly includes: A fixing cylinder is fixed to the outer right side of the model body and sleeved on the outside of the right side of the liquid distribution pipe; The movable sleeve has its inner side threadedly connected to the outer side of the fixed cylinder; An extension frame is fastened to the outer right side of the liquid distribution tube, and the left side of the extension frame can be pressed into contact with the right end of the movable sleeve.

6. The single-grid model of the anode chamber of an ion-exchange membrane electrolyzer according to claim 5, characterized in that, The right end of the movable sleeve has multiple spherical protrusions arranged in a ring.

7. The single-grid model of the anode chamber of an ion-exchange membrane electrolyzer according to claim 5, characterized in that, A scale plate is provided on the right side of the main body of the model, and a pointer is connected to the extension frame. The pointer is used in conjunction with the scale plate.

8. The single-grid model of the anode chamber of an ion-exchange membrane electrolyzer according to claim 5, characterized in that, The liquid distribution pipe has three spray holes spaced apart from left to right, and the three spray holes are of different sizes; an adjusting column is slidably and sealed inside the liquid distribution pipe. The left end of the adjusting column is open and the right end is closed. A connecting port is opened on the side wall of the adjusting column. The connecting port extends along the circumferential direction of the adjusting column and can be aligned and connected with one of the three spray holes.

9. The single-grid model of the anode chamber of an ion-exchange membrane electrolyzer according to claim 8, characterized in that, The left end of the liquid distribution pipe is connected to a rotary joint; the right end of the adjusting column is connected to an extension rod, and the right end of the extension rod is located outside the liquid distribution pipe.

10. The single-grid model of the anode chamber of an ion-exchange membrane electrolyzer according to claim 9, characterized in that, The extension rod has three annular grooves, and the lateral spacing between the three annular grooves matches the lateral spacing between the three injection holes. An elastic rod is provided above the extension rod and is installed at the right end of the liquid distribution pipe. The lower end of the elastic rod can extend into one of the annular grooves.

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