CN210894202U

CN210894202U - Pressurization type electrochemical reaction tank

Info

Publication number: CN210894202U
Application number: CN201921350256.XU
Authority: CN
Inventors: 温晓东; 刘兴武; 曹直
Original assignee: Shanxi Institute of Coal Chemistry of CAS
Current assignee: Shanxi Institute of Coal Chemistry of CAS
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-06-30
Anticipated expiration: 2029-08-20

Abstract

The utility model relates to a pressurization type electrochemical reaction pond, two the same reaction tank main parts (1) are connected through first sealed ring flange (17) with the mode of fluid intercommunication and are constituteed H type two room electrochemical reaction pond (10), first sealed ring flange (17) are by left sealed ring flange, left side packing ring, polymer electrolyte membrane, right side packing ring, right side sealed ring flange forms through bolted connection, the upper portion of every reaction tank main part (1) all is uncovered, reaction tank lid (2) are all installed on the upper portion of every reaction tank main part (1), electrode (7), the outside and reaction tank lid (2) sealing connection of intake pipe (5) and outlet duct (6), reaction tank main part (1) and reaction tank lid (2) sealing connection.

Description

Pressurization type electrochemical reaction tank

Technical Field

The utility model relates to a pressurization type electrochemical reaction pond belongs to electrochemistry and electro-catalysis field.

Background

The electrocatalysis technology is a catalysis action which takes electric energy as external field energy to accelerate charge transfer on the interface of an electrode and an electrolyte to react. By utilizing electrocatalysis, various gas-phase small molecules can be converted into high-value-added products, such as CO and CO2 can be reduced into various organic chemicals, and the N2 hydrogenation synthesis of ammonia can be realized. Compared with the traditional chemical process, the electrocatalysis technology has the outstanding advantage that high-efficiency conversion can be realized at normal temperature by using water as a hydrogen source. The solubility of gas-phase small molecules in electrolytes is very important for the electrocatalysis process, researchers usually increase the solubility of gas-phase raw material molecules by screening electrolyte solutions to promote the reaction efficiency, but the used solvents are often high in price, and some reagents have toxicity, so that the problem of environmental protection is brought, and the application prospect is limited. Increasing the solubility of gas molecules in the electrolyte by pressurization is a simple and efficient method, however, the electrocatalytic reaction cell used in the existing research has insufficient sealing performance due to the limitation of material and structural design, and does not have the capability of bearing high pressure.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the pressurizing electrochemical reaction cell has good sealing performance and can bear high pressure.

The technical scheme adopted by the invention is as follows: a pressure type electrochemical reaction tank, two identical reaction tank main bodies (1) are connected in a fluid communication mode (namely a pipeline connection mode) through a first sealing flange plate (17) to form an H-shaped double-chamber electrochemical reaction tank (10), the first sealing flange plate (17) is formed by connecting a left sealing flange plate, a left gasket, a polymer electrolyte membrane, a right gasket and a right sealing flange plate through bolts, the upper part of each reaction tank main body (1) is open, a reaction tank cover (2) is arranged on the upper part of each reaction tank main body (1), an electrode (7) with a downward electrode tip, an air inlet pipe (5) and an air outlet pipe (6) are arranged on each reaction tank cover (2), each electrode (7) is composed of a working electrode, a reference electrode and a counter electrode, the outer sides of the electrode (7), the air inlet pipe (5) and the air outlet pipe (6) are hermetically connected with the reaction tank cover (2) (namely sealed through a sealing element), the reaction tank main body (1) is connected with the reaction tank cover (2) in a sealing way (namely sealed by a sealing element).

The reaction tank main body (1) is connected with the reaction tank cover (2) through a second sealing flange, the second sealing flange is composed of an upper sealing flange (15), an O-shaped sealing ring (3) and a lower sealing flange (11), the upper sealing flange (15) is arranged at the lower part of the reaction tank cover (2), the lower sealing flange (11) is arranged at the upper part of the reaction tank main body (1), the reaction tank cover (2) comprises a metal flange (13), an electrode sealing disk (14), the upper sealing flange (15), the metal flange (13), the electrode sealing disk (14), the upper sealing flange (15) is connected through bolts or screws (9), and the reaction tank main body (1) comprises the lower sealing flange (11) and a reaction chamber (12).

Base (4) are installed to reaction tank main part (1) lower part, reaction tank main part (1) with flange joint's mode set up in the first recess of columniform of base (4), just the outside diameter of the reacting chamber of reaction tank main part (1) is less than the inside diameter of the first recess of base (4).

The degree of depth of the first recess of base (4) is not less than the length of the vertical direction of the reacting chamber of reaction tank main part (1), base (4) with flange joint's mode with reaction tank main part (1) with reaction tank lid (2) are connected, the base is the cylinder structure, the external diameter of base (4) is unanimous with the biggest external diameter of lower sealing flange dish (11).

The reaction chamber of the reaction tank main body (1) is a cylindrical cavity, and the bottom of the reaction chamber of the reaction tank main body (1) is of a plane structure.

And a second groove (annular groove) is formed in the surface of one side, adjacent to the upper sealing flange (15), of the lower sealing flange (11), and an O-shaped sealing ring (3) is placed in the second groove, so that the lower sealing flange (11) and the upper sealing flange (15) are connected in a sealing manner.

And a temperature sensor is arranged in the reaction tank cover (2) along the axial direction of the reaction tank cover, and the head of the temperature sensor is vertically inserted downwards into the reaction tank main body (1).

The invention has the beneficial effects that: the reaction tank cover can fix three electrodes, an air inlet pipe and an air outlet pipe inside the reaction tank cover through the structure of the metal flange, the electrode sealing disc and the upper sealing flange (electrode supporting disc), and simultaneously has good sealing effect under high pressure. In addition, the structure of the working electrode, the reference electrode, the counter electrode, the air inlet pipe and the air outlet pipe which are arranged on the reaction cell cover can simultaneously realize the effects of electrochemical measurement and the input and output of electrocatalytic reaction gas materials.

The utility model provides a pressurization type electrochemical reaction pond's structural design is reasonable, wherein settles each electrode joint and admit air, outlet duct specifically, has strengthened reaction pond pressurization leakproofness, and equipment easy dismounting labour saving and time saving has simultaneously expanded the pressure condition scope of electrochemistry research (for example can carry out electrochemical reaction under the pressure that reaches 4 Mpa).

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the reaction tank cover structure of the present invention;

FIG. 3 is a schematic longitudinal sectional view of the reaction tank cover of the present invention;

FIG. 4 is a schematic view of the connection between the reaction tank cover and the reaction tank main body;

the electrochemical reaction cell comprises a reaction cell main body 1, a reaction cell cover 2, an O-shaped sealing ring 3, a base 4, a base 5, an air inlet pipe 6, an outlet pipe 7, an electrode 8, a sealing element 9, a bolt or a screw 10, an H-shaped double-chamber electrochemical reaction cell, a lower sealing flange plate 11, a reaction chamber 12, a metal flange plate 13, a 14 electrode sealing disc 15, an upper sealing flange plate 16, a connecting pipeline 17 and a first sealing flange plate.

Detailed Description

The following describes the embodiments of the present invention in detail. It should be understood that the description herein is only for purposes of illustration and explanation and is not intended to limit the scope of the present disclosure.

An exemplary pressurized electrochemical reaction cell according to the present invention will be described in detail with reference to fig. 1 to 4.

As shown in fig. 4, an exemplary single-chamber pressurized electrochemical reaction cell of the present invention includes a single cell main body 1, a cell cover 2, and a metal base 4.

As shown in FIGS. 2 and 3, the reaction cell cover 2 is composed of three members, from top to bottom, a metal flange 13, an electrode seal disk 14 and an upper seal flange 15. The diameters of the middle parts of one air inlet pipe 5, one air outlet pipe 6 and three electrodes 7 of the cylindrical structure are larger than the diameters of the two ends of the cylindrical structure, and the length of each joint is larger than the thickness of the reaction tank cover. The electrode 7, the gas inlet pipe 5 and the gas outlet pipe 6 are respectively inserted into and penetrate through five holes arranged in the electrode sealing disk 14 and the upper sealing flange 15 along the axial direction, and the middle part of each joint with relatively larger diameter is positioned between the electrode sealing disk 14 and the upper sealing flange 15. Furthermore, between the above-mentioned relatively large diameter middle part of each joint and the upper sealing flange 15, a respective sealing element 8 (rubber gasket or rubber pad) is arranged to effect sealing of the respective parts. The lower end of the gas inlet pipe 5 is located in the cavity of the reaction chamber 12 and below the liquid level of the electrolyte in the cavity, thereby ensuring that the gas introduced through the gas inlet can be dissolved in the electrolyte as much as possible to realize the electro-catalytic treatment of a larger amount of gas molecules. The lower ends of the three electrodes 7 in the vertical direction may be respectively connected to the working electrode tip, the reference electrode tip, and the counter electrode tip. The lower ends of the working, reference and counter electrode tips are located within a reaction chamber (not shown).

The single reaction tank body 1 comprises a lower sealing flange 11 and a reaction chamber 12 which are hermetically connected by an O-ring 3, and the two components are connected into a whole to form the reaction tank body 1. The surface of one side of the lower sealing flange 11, which is adjacent to the upper sealing flange 15, is provided with an annular groove, an O-shaped sealing ring 3 is arranged in the groove, and the O-shaped sealing ring 3 is positioned between the lower sealing flange 11 and the upper sealing flange 15 of the reaction tank cover 2, so that the sealing between the reaction tank cover and the reaction tank main body is realized.

The metal base 4 is a cylindrical structure, and the outer diameter of the metal base is consistent with the maximum outer diameter of the reaction tank main body 1. The reaction chamber 12 may be placed in a groove of the metal base 4, the groove having a diameter larger than an outer diameter of the reaction chamber 12 and a depth not smaller than a length of the reaction chamber 12 in a vertical direction.

The individual reaction cell main body 1, the individual reaction cell cover 2 and the metal base 4 have flange structures of the same specification, and the individual reaction cell main body 1, the individual reaction cell cover 2 and the metal base 4 are screw-coupled and tightly fixed by means of a plurality of bolts or screws 9 from top to bottom, thereby ensuring good sealing performance under pressurized conditions.

On the other hand, as shown in fig. 1, an exemplary H-type dual-chamber electrochemical reaction cell of the present invention includes: a double-chamber reaction tank main body 10 and two reaction tank covers 2.

Wherein, the reaction tank main body 1 comprises a lower sealing flange 11 and a reaction chamber 12 which are hermetically connected through an O-shaped sealing ring, and the two reaction tank main bodies 1 in the figure 1 are in fluid communication to serve as a double-chamber reaction tank main body 10. The surface of one side of the lower sealing flange 11, which is adjacent to the upper sealing flange 15, is provided with an annular groove, an O-shaped sealing ring 3 is arranged in the groove, and the O-shaped sealing ring 3 is positioned between the lower sealing flange 11 and the upper sealing flange 15 of the reaction tank cover 2, so that the sealing between the reaction tank cover and the reaction tank main body is realized. The connecting pipe 16 and the exchange membrane sealing flange 17 are used to realize fluid communication between the two reaction chambers 12 from the lower and middle portions of the two separate reaction chambers 12, and the opening direction of the connecting part 16 and the first sealing flange 17 is perpendicular to the axial direction of the reaction chambers 12. Two reaction tank bodies 1 with the same specification are respectively used as a cathode chamber and an anode chamber of an H-shaped double-chamber electrochemical reaction tank and are communicated with a connecting pipeline 16 through a first sealing flange 17, and a polymer electrolyte membrane is arranged between the sealing surfaces of the first sealing flange 17.

The reaction cell cover 2 is composed of three parts from top to bottom, namely a metal flange 13, an electrode sealing disk 14 and an upper sealing flange 15. The diameters of the middle parts of one air inlet pipe 5, one air outlet pipe 6 and three electrodes 7 which are in a cylindrical structure are larger than the diameters of the two ends of the air inlet pipe, the air outlet pipe and the three electrodes, and the length of each joint is larger than the thickness of the reaction tank cover. The electrode 7, the gas inlet tube 5 and the gas outlet tube 6 are inserted into and penetrate five holes arranged in the electrolytic sealing disk 14 and the upper sealing flange 15 along the axial direction thereof, respectively, and the relatively large diameter middle part of each joint is positioned between the electrode sealing disk and the electrode supporting disk. Furthermore, a respective sealing element 8 is provided between each of the relatively large diameter intermediate portions of the respective joints and the upper sealing flange 15 to effect sealing of the respective joint. The lower end of the gas inlet pipe 5 is located in the cavity of the reaction chamber 12 and below the liquid level of the electrolyte in the cavity, thereby ensuring that the gas introduced through the gas inlet can be dissolved in the electrolyte as much as possible to realize the electro-catalytic treatment of a larger amount of gas molecules.

The methods and structures of the above embodiments not described in detail are well known in the art, and need not be described in detail herein. The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, and these simple variants all belong to the utility model discloses a protection scope.

Claims

1. A pressurized electrochemical reaction cell, comprising: two identical reaction tank main bodies (1) are connected in a fluid communication mode through a first sealing flange (17) to form an H-shaped double-chamber electrochemical reaction tank (10), the first sealing flange (17) is formed by connecting a left sealing flange, a left gasket, a polymer electrolyte membrane, a right gasket and a right sealing flange through bolts, the upper part of each reaction tank main body (1) is open, a reaction tank cover (2) is arranged on the upper part of each reaction tank main body (1), an electrode (7) with a downward electrode tip is arranged on each reaction tank cover (2), the gas-liquid separation device comprises a gas inlet pipe (5) and a gas outlet pipe (6), wherein an electrode (7) is composed of a working electrode, a reference electrode and a counter electrode, the outer sides of the electrode (7), the gas inlet pipe (5) and the gas outlet pipe (6) are hermetically connected with a reaction tank cover (2), and a reaction tank main body (1) is hermetically connected with the reaction tank cover (2).

2. A pressurized electrochemical reaction cell according to claim 1, wherein: the reaction tank main body (1) is connected with the reaction tank cover (2) through a second sealing flange, the second sealing flange is composed of an upper sealing flange (15), an O-shaped sealing ring (3) and a lower sealing flange (11), the upper sealing flange (15) is arranged at the lower part of the reaction tank cover (2), the lower sealing flange (11) is arranged at the upper part of the reaction tank main body (1), the reaction tank cover (2) comprises a metal flange (13), an electrode sealing disk (14), the upper sealing flange (15), the metal flange (13), the electrode sealing disk (14), the upper sealing flange (15) is connected through bolts or screws (9), and the reaction tank main body (1) comprises the lower sealing flange (11) and a reaction chamber (12).

3. A pressurized electrochemical reaction cell according to claim 1, wherein: base (4) are installed to reaction tank main part (1) lower part, reaction tank main part (1) with flange joint's mode set up in the first recess of columniform of base (4), just the outside diameter of the reacting chamber of reaction tank main part (1) is less than the inside diameter of the first recess of base (4).

4. A pressurized electrochemical reaction cell according to claim 3, wherein: the degree of depth of the first recess of base (4) is not less than the length of the vertical direction of the reacting chamber of reaction tank main part (1), base (4) with flange joint's mode with reaction tank main part (1) with reaction tank lid (2) are connected, the base is the cylinder structure, the external diameter of base (4) is unanimous with the biggest external diameter of lower sealing flange dish (11).

5. A pressurized electrochemical reaction cell according to claim 1, wherein: the reaction chamber of the reaction tank main body (1) is a cylindrical cavity, and the bottom of the reaction chamber of the reaction tank main body (1) is of a plane structure.

6. A pressurized electrochemical reaction cell according to claim 2, wherein: and a second groove is formed in the surface of one side, adjacent to the upper sealing flange (15), of the lower sealing flange (11), and an O-shaped sealing ring (3) is placed in the second groove, so that the lower sealing flange (11) and the upper sealing flange (15) are connected in a sealing manner.

7. A pressurized electrochemical reaction cell according to claim 1, wherein: and a temperature sensor is arranged in the reaction tank cover (2) along the axial direction of the reaction tank cover, and the head of the temperature sensor is vertically inserted downwards into the reaction tank main body (1).