Electrolytic tank with modified cathode and anode nets

Abstract

The utility model relates to the technical field of electrolytic baths, in particular to an electrolytic bath transformed from a cathode net and an anode net. The electrolytic cell comprises a cell shell and a cell shell bottom plate, the cell shell is located at the upper end of the cell shell bottom plate, and rib plates are arranged on the two sides of the cell shell respectively; the rib plates are divided into a cathode rib plate and an anode rib plate, a partition plate is fixedly arranged in the middle of the cell shell, a cathode chamber is formed between the arranged cathode rib plate and the partition plate, an anode chamber is formed between the arranged anode rib plate and the partition plate, meanwhile, a cathode film polar distance assembly is arranged in the cathode chamber, and an anode film polar distance assembly is arranged in the anode chamber; according to the electrolytic bath transformed by the cathode and anode net, the original bottom net is replaced by the cathode elastic net, so that the voltage of the unit tank during the operation of the whole electrolytic bath transformed by the cathode and anode net can be obviously reduced under the same load condition.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to an electrolytic cell modified by anode and cathode grids. Background Art

[0002] Membrane electrolysis is a method of using a cation exchange membrane to separate a unit electrolytic cell into an anode chamber and a cathode chamber to separate the electrolysis products. Ion membrane electrolysis is a new technology developed on the basis of ion exchange resin (see ion exchanger). It uses the selective permeability of ion exchange membranes to anions and cations, allowing ions with one charge to pass through while restricting ions with the opposite charge to pass through, so as to achieve the purpose of concentration, desalination, purification, refining and electrochemical synthesis.

[0003] The membrane cell electrolysis method requires an electrolytic cell when it is implemented. The related art provides an electrolytic cell, in which a bottom screen is arranged on one side of the yin-yang rib plate, and the bottom screen is welded and fixed on one side of the yin-yang rib plate. The thickness of the bottom screen is controlled at 0.3-0.6 mm, and the material is titanium alloy.

[0004] However, the defects of this rib plate structure design are obvious. For example, the titanium alloy welding process will make the bottom mesh flat and accurate. In addition, new stress will be generated during the welding process, which will aggravate the deformation of the unit cell half shell and increase the unit cell voltage required for the later operation of the electrolytic cell.

[0005] In view of the problems in the above-mentioned background technology, the utility model aims to provide an electrolytic cell with modified anode and cathode grids. Utility Model Content

[0006] The utility model aims to provide an electrolytic cell with modified anode and cathode grids to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An electrolytic cell modified by anode and cathode nets, the electrolytic cell modified by anode and cathode nets comprising:

[0009] A tank shell and a tank shell bottom plate, wherein the tank shell is located at the upper end of the tank shell bottom plate, and rib plates are respectively provided on both sides of the tank shell; a liquid collecting box assembly is installed on the rib plate; the left and right sides of the lower end of the rib plate are respectively connected to an overflow pipe and a liquid inlet pipe;

[0010] The ribs are divided into cathode ribs and anode ribs. A partition is fixed in the middle of the tank shell. A cathode chamber is formed between the cathode ribs and the partition. An anode chamber is formed between the anode ribs and the partition. A cathode membrane pole distance assembly is provided inside the cathode chamber, and an anode membrane pole distance assembly is provided inside the anode chamber.

[0011] The cathode membrane distance assembly includes an ion membrane and a cathode elastic net (i.e., an elastic net), the ion membrane is installed on one side of the cathode elastic net, and the cathode elastic net is installed and fixed on one side of the partition; the anode membrane distance assembly includes an anode elastic net; the cathode elastic net has the same structure as the anode elastic net.

[0012] As a further solution of the utility model: buckles are respectively provided at both ends of one end of the cathode rib plate, and a clamping groove is opened on the cathode rib plate.

[0013] As a further solution of the utility model: the cathode elastic mesh includes a nickel bottom mesh, an elastic element and a surface mesh, which are distributed in sequence; a nickel bottom mesh is welded and fixed at the slot position, and an elastic element is arranged above the nickel bottom mesh, and the elastic element includes a nickel elastic mesh and a nickel elastic sheet; one side of the elastic element is covered with a surface mesh, and the surface of the surface mesh is coated with an active coating.

[0014] As a further solution of the utility model: the upper and lower ends of the rib plate are connected and fixed to the upper and lower ends of the tank shell through a fastening flange system; the bottom end of the cathode chamber is arranged and distributed at intervals to connect to the caustic soda feed distribution pipe; the bottom end of the anode chamber is arranged and distributed at intervals to connect to the brine feed distribution pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Compared with the current electrolytic cells, the electrolytic cells transformed by the anode and cathode grids have the following advantages:

[0017] The structure of the rib plate of the electrolytic cell is improved and designed, a slot is opened on the rib plate, and a cathode elastic net is installed on the slot; the cathode elastic net includes a nickel bottom net, an elastic element and a surface net; the elastic element includes a nickel elastic net and a nickel elastic sheet; one side of the elastic element is covered with a layer of surface net, and the surface of the surface net is coated with an active coating;

[0018] By arranging a cathode elastic mesh to replace the original bottom mesh, on the one hand, the problem of deformation such as concave or convex caused by pressure fluctuations in the electrolytic cell due to the large spacing between the rib plates, the electrode substrate (titanium, nickel mesh) of the collector, i.e., the titanium alloy bottom mesh, being welded to the rib plates, can be reduced; on the other hand, under the same load conditions, the unit cell voltage of the entire electrolytic cell modified by the anode and cathode meshes can be significantly reduced during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0020] Figure 1 It is a front view of an electrolytic cell modified with anode and cathode grids according to an embodiment of the utility model.

[0021] Figure 2 A side view of an electrolytic cell modified with anode and cathode grids according to an embodiment of the utility model.

[0022] Figure 3 A schematic diagram of the rib plate structure of an electrolytic cell modified by anode and cathode grids according to an embodiment of the utility model.

[0023] Figure 4 A side view of a cathode rib plate of an electrolytic cell modified from an anode and cathode grid according to an embodiment of the utility model.

[0024] Figure 5 The figure is a side view of a cathode rib plate of an electrolytic cell in the prior art.

[0025] In the figure: 1-tank shell, 2-liquid collecting box assembly, 3-rib plate, 4-elastic net, 5-overflow pipe, 6-tank shell bottom plate, 7-liquid inlet pipe, 8-fastening flange system, 9-cathode rib plate, 10-cathode chamber, 11-ion membrane, 12-cathode elastic net, 13-partition, 14-caustic soda feed distribution pipe, 15-down liquid plate, 16-brine feed distribution pipe, 17-conductive contact strip, 18-anode rib plate, 19-anode chamber, 20-anode elastic net, 21-buckle, 22-slot, 23-nickel bottom net, 24-elastic element, 25-surface net, 26-bottom net. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Example

[0028] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The electrolytic cell modified by the anode and cathode nets provided in the embodiment of the utility model comprises:

[0029] A tank shell 1 and a tank shell bottom plate 6, wherein the tank shell 1 is located at the upper end of the tank shell bottom plate 6, and rib plates 3 are respectively provided on both sides of the tank shell 1; a liquid collecting box assembly 2 is installed on the rib plate 3; the left and right sides of the lower end of the rib plate 3 are respectively connected to an overflow pipe 5 and a liquid inlet pipe 7; the liquid collecting box assembly 2 arranged on the rib plate 3 is used to collect electrolyte droplets when the improved membrane gap electrolyzer is powered on and in operation; the overflow pipe 5 is used to guide excess electrolyte back to the electrolyzer for reuse through the connected overflow pipe 5 when the electrolyte flow exceeds a certain limit during the operation of the electrolyzer, so as to maintain the stable operation of the entire improved membrane gap electrolyzer; and the liquid inlet pipe 7 is used to introduce the electrolyte required for the operation of the improved membrane gap electrolyzer;

[0030] The rib plate 3 is divided into a cathode rib plate 9 and an anode rib plate 18. A partition plate 13 is fixedly installed in the middle of the tank shell 1. A cathode chamber 10 is formed between the cathode rib plate 9 and the partition plate 13. An anode chamber 19 is formed between the installed anode rib plate 18 and the partition plate 13. A cathode membrane pole distance assembly is provided inside the cathode chamber 10, and an anode membrane pole distance assembly is provided inside the anode chamber 19.

[0031] The cathode membrane pole distance assembly includes an ion membrane 11 and a cathode elastic net 12 (i.e., elastic net 4), wherein the ion membrane 11 is installed on one side of the cathode elastic net 12, and the cathode elastic net 12 is installed and fixed on one side of the partition 13; the anode membrane pole distance assembly includes an anode elastic net 20; the cathode elastic net 12 has the same structure as the anode elastic net 20; in addition, a liquid dropper 15 is installed on one side of the lower end of the anode elastic net 20, and the installed liquid dropper 15 is used to serve as a liquid channel and is also an important space for realizing gas-liquid separation;

[0032] In the embodiment of the utility model, when the electrolytic cell modified by the anode and cathode nets is used, the cathode elastic net 12 installed in the cathode chamber 10 cooperates with the anode elastic net 20 installed in the anode chamber 19, and under the same load conditions, the unit cell voltage of the entire electrolytic cell modified by the anode and cathode nets can be significantly reduced during operation;

[0033] See also Figure 3 and Figure 4 In one embodiment of the utility model, buckles 21 are respectively provided at both ends of one end of the cathode rib plate 9, and the buckles 21 are provided to facilitate the entire cathode rib plate 9 to be suspended and fixed on the tank shell 1, so as to realize the spaced arrangement and distribution of the rib plates 3; at the same time, a slot 22 is provided on the cathode rib plate 9, and the slot 22 is provided to facilitate the fixing of the cathode elastic net 12;

[0034] See also Figure 4In an embodiment of the utility model, the cathode elastic net 12 includes a nickel bottom net 23, an elastic element 24 and a surface net 25, and the nickel bottom net 23, the elastic element 24 and the surface net 25 are distributed in sequence; when the cathode elastic net 12 is formed on the cathode rib plate 9, the nickel bottom net 23 is first welded and fixed at the position of the slot 22 of the cathode rib plate 9, and then the elastic element 24 is added above the nickel bottom net 23, and the added elastic element 24 includes a nickel elastic net and a nickel elastic sheet; finally, a layer of surface net 25 is covered on one side of the elastic element 24, and the surface of the surface net 25 is coated with an active coating;

[0035] See also Figure 1 and Figure 2 In one embodiment of the utility model, the upper and lower ends of the rib plate 3 are connected and fixed to the upper and lower ends of the tank shell 1 by a fastening flange system 8; the bottom end of the cathode chamber 10 is arranged and distributed at intervals to connect to the caustic soda feed distribution pipe 14, and the connected caustic soda feed distribution pipe 14 is used to pass the caustic soda solution of the electrolyte into the cathode chamber 10; the bottom end of the anode chamber 19 is arranged and distributed at intervals to connect to the brine feed distribution pipe 16, and the connected brine feed distribution pipe 16 is used to pass the brine of the electrolyte into the anode chamber 19; at the same time, a conductive contact strip 17 is also distributed on the outer surface of the anode rib plate 18, and the distributed conductive contact strip 17 is used to enhance the conductivity of the electrolyte when the electrolytic cell is powered on and running;

[0036] See also Figure 5 The cathode rib plate 9 of the electrolytic cell in the prior art has an overall size that is 2.0-3.0 mm smaller than the overall size of the cathode rib plate 9 in the electrolytic cell modified by the anode and cathode nets; at the same time, a bottom net 26 is provided on one side of the cathode rib plate 9;

[0037] Compared with the electrolytic cell in the prior art, the electrolytic cell modified by the anode and cathode nets can reduce the problem of deformation such as concave or convex due to pressure fluctuation in the electrolytic cell because the electrode substrate (titanium, nickel net) of the collector is welded to the rib plate 3 and the spacing between the rib plates 3 is large. On the other hand, under the same load conditions, the unit cell voltage of the electrolytic cell modified by the anode and cathode nets can be significantly reduced during operation.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrolytic cell with modified cathode and anode grids, comprising: A tank shell (1) and a tank shell bottom plate (6), wherein the tank shell (1) is located at the upper end of the tank shell bottom plate (6), and rib plates (3) are respectively provided on both sides of the tank shell (1); a liquid collecting box assembly (2) is installed on the rib plate (3); the left and right sides of the lower end of the rib plate (3) are respectively connected to an overflow pipe (5) and a liquid inlet pipe (7); the characteristics are: The rib plate (3) is divided into a cathode rib plate (9) and an anode rib plate (18); a partition plate (13) is fixedly installed in the middle of the tank shell (1); a cathode chamber (10) is formed between the cathode rib plate (9) and the partition plate (13); an anode chamber (19) is formed between the installed anode rib plate (18) and the partition plate (13); a cathode membrane polar distance assembly is provided inside the cathode chamber (10); and an anode membrane polar distance assembly is installed inside the anode chamber (19); The cathode membrane polar distance assembly comprises an ion membrane (11) and a cathode elastic net (12), wherein the ion membrane (11) is installed in close contact with one side of the cathode elastic net (12), and the cathode elastic net (12) is installed and fixed on one side of the partition (13); the anode membrane polar distance assembly comprises an anode elastic net (20); and the cathode elastic net (12) and the anode elastic net (20) have the same structure.

2. The electrolytic cell modified with anode and cathode grids according to claim 1, characterized in that: Buckles (21) are respectively provided at both ends of one end of the cathode rib plate (9), and a clamping groove (22) is provided on the cathode rib plate (9).

3. The electrolytic cell modified with anode and cathode grids according to claim 1, characterized in that: The cathode elastic net (12) comprises a nickel material bottom net (23), an elastic element (24) and a surface net (25), wherein the nickel material bottom net (23), the elastic element (24) and the surface net (25) are arranged in sequence; the nickel material bottom net (23) is welded and fixed at the position of the slot (22), the elastic element (24) is arranged above the nickel material bottom net (23), and the elastic element (24) comprises a nickel material elastic net and a nickel material elastic sheet; one side of the elastic element (24) is covered with a surface net (25), and the surface of the surface net (25) is coated with an active coating.

4. The electrolytic cell modified with anode and cathode grids according to claim 1, characterized in that: The upper and lower ends of the rib plate (3) are connected and fixed to the upper and lower ends of the tank shell (1) through a fastening flange system (8); the bottom end of the cathode chamber (10) is arranged at intervals and connected to a caustic soda feed distribution pipe (14); the bottom end of the anode chamber (19) is arranged at intervals and connected to a brine feed distribution pipe (16).

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