Technical improvement equipment for lifting bottom plate of electrolytic cell

Abstract

The utility model relates to technical improvement equipment for lifting a bottom plate of an electrolytic bath, which belongs to the field of chemical engineering and comprises a bath shell. A boss is arranged at the bottom of the tank shell, a plurality of channel steels are arranged at the top of the boss, a plurality of steel plates are welded at the tops of the channel steels, and polytetrafluoroethylene plates are arranged between the steel plates and the tubes; an anode chamber is arranged on the left side of the apron board, a cathode chamber is arranged on the right side of the apron board, and the anode chamber is communicated with the cathode chamber through a nitrogen pipeline; an electrolytic cell anode plate is arranged in the anode chamber; an electrolytic cell cathode plate is arranged in the cathode chamber; the boss is additionally arranged at the bottom of the tank shell structure, so that the temperature of the bottom of the tank shell is increased, crystallization is avoided, production raw materials are saved, and labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to a technical transformation equipment for raising the bottom plate of an electrolytic cell, belonging to the chemical industry field. Background Art

[0002] The nitrogen trifluoride electrolytic cell comprises a cell body and a cell cover; the cell body consists of an anode chamber, a cathode chamber and an electrolytic cell, etc.; the anode chamber and the cathode chamber are completely separated by a skirt plate, and a nitrogen pipeline is installed in the electrolytic cell and communicated with the cathode chamber and the anode chamber; the distance between the cathode plate of the electrolytic cell and the bottom of the electrolytic cell is 306 mm.

[0003] According to the electrolytic cell disclosed in Chinese invention patent CN104233375A, the present invention provides an electrolytic cell, comprising: a cell shell, a cell lining and at least one set of thermocouples. A receiving space is defined inside the cell shell; the cell lining is located on the bottom wall of the cell shell and comprises multiple layers of sub-linings distributed from top to bottom; the thermocouples are located inside the cell lining and connected to a temperature display instrument for monitoring the temperature of the cell lining. Thus, the electrolytic cell of the above embodiment of the present invention can automatically detect the temperature at different positions of the cell lining, further improve the rationality of the cell lining design, narrow the theoretical gap and improve the quality of the electrolytic cell; and can monitor the temperature of the cell lining of the electrolytic cell in real time, so that it is used within a reasonable temperature range to further improve the service life of the electrolytic cell.

[0004] Since the bottom of the cell shell does not participate in the electrolysis reaction, the temperature is relatively low and easy to crystallize, and the electrolytic residues accumulate at the bottom, resulting in further increase of bottom crystallization; at the same time, during the maintenance process, it is found that there are unreacted crystalline materials (white ammonium hydrogen fluoride) under the residues, which not only wastes materials but also increases the maintenance difficulty. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to increase the bottom temperature by adding a boss at the bottom of the cell shell structure, thereby reducing the thickness of the materials that do not participate in the reaction at the bottom, saving a large amount of production raw materials and reducing the labor cost at the same time.

[0006] The technical transformation equipment for raising the bottom plate of an electrolytic cell described in the utility model comprises a cell shell, and a tube bank is arranged inside the cell shell;

[0007] A boss is arranged at the bottom of the cell shell, several channel steels are arranged on the top of the boss, several steel plates are welded on the top of the channel steels, and a tetrafluoroethylene plate is arranged between the steel plates and the tube bank;

[0008] A skirt plate is arranged in the middle of the cell shell, the left side of the skirt plate is the anode chamber, the right side of the skirt plate is the cathode chamber, and the anode chamber and the cathode chamber are communicated through a nitrogen pipeline;

[0009] The anode plate of the electrolytic cell is placed in the anode chamber, and the cathode plate of the electrolytic cell is placed in the cathode chamber.

[0010] Furthermore, the tube group includes an anode tube group and a cathode tube group;

[0011] The anode tube group includes anode horizontal tubes and anode vertical tubes, and the anode horizontal tubes and the anode vertical tubes are arranged in a layered and staggered manner;

[0012] The cathode tube group includes cathode horizontal tubes and cathode vertical tubes, and the cathode horizontal tubes and the cathode vertical tubes are arranged in a layered and staggered manner.

[0013] Furthermore, the steel plates are integrally formed by welding, and the steel plate located on the outside is connected to the tank shell by welding.

[0014] Furthermore, the number of steel plates is greater than or equal to 7.

[0015] Furthermore, weld chamfers are provided at the corners of the steel plates, and the value range of the weld chamfers is 10 mm - 15 mm.

[0016] Furthermore, the value range of the height of the convex platform is 195 mm - 205 mm.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] For the electrolytic cell bottom plate elevation technical renovation equipment described in the present utility model, the tank shell is used to hold the electrolyte, the tube group is used to improve the conductivity efficiency of the electrolyte; the convex platform is used to support several channel steels at the top, and the channel steels increase the overall height of the bottom of the tank shell, shorten the distance between the anode plate and the cathode plate of the electrolytic cell and the bottom of the tank shell, thereby increasing the temperature of the bottom of the tank shell, avoiding crystallization, and at the same time reducing material waste; the tetrafluoroethylene plate is used to isolate the tube group and the steel plate, preventing the anode plate and the cathode plate of the electrolytic cell from forming a conductive path with the convex platform, channel steel and steel plate at the bottom, thereby improving the overall electrolysis efficiency; furthermore, a large amount of production raw materials are saved, and at the same time, the labor cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of an embodiment of the present utility model;

[0020] Figure 2 is a perspective view of an embodiment of the present utility model after removing the tank shell;

[0021] Figure 3 is a top view of an embodiment of the present utility model;

[0022] Figure 4 is Figure 3 a full sectional view taken along line A - A in

[0023] 1. Groove shell; 2. Tube bundle; 3. Boss; 4. Channel steel; 5. Steel plate; 6. Teflon plate; 7. Skirt plate; 8. Anode chamber; 9. Cathode chamber; 10. Nitrogen pipeline; 11. Electrolytic cell anode plate; 12. Electrolytic cell cathode plate; 13. Anode tube bundle; 14. Cathode tube bundle; 15. Anode horizontal tubes; 16. Anode vertical tubes; 17. Cathode horizontal tubes; 18. Cathode vertical tubes; 19. Weld chamfer. Detailed implementation manners

[0024] Embodiment 1

[0025] As Figures 1 - 4 shown, a technical renovation equipment for raising the bottom plate of an electrolytic cell according to the present utility model includes a groove shell 1, and a tube bundle 2 is arranged inside the groove shell 1;

[0026] A boss 3 is arranged at the bottom of the groove shell 1, several channel steels 4 are arranged on the top of the boss 3, several steel plates 5 are welded on the top of the channel steels 4, and a Teflon plate 6 is arranged between the steel plates 5 and the tube bundle 2;

[0027] A skirt plate 7 is arranged in the middle of the groove shell 1, the left side of the skirt plate 7 is an anode chamber 8, the right side of the skirt plate 7 is a cathode chamber 9, and the anode chamber 8 and the cathode chamber 9 are communicated through a nitrogen pipeline 10;

[0028] An electrolytic cell anode plate 11 is placed in the anode chamber 8, and an electrolytic cell cathode plate 12 is placed in the cathode chamber 9.

[0029] The groove shell 1 is used to hold the electrolyte, and the tube bundle 2 is used to improve the conductivity efficiency of the electrolyte; the boss 3 is used to support several channel steels 4 on the top, the channel steels 4 increase the overall height of the bottom of the groove shell 1, shorten the distance between the electrolytic cell anode plate and the electrolytic cell cathode plate and the bottom of the groove shell, thereby increasing the temperature of the bottom of the groove shell, avoiding crystallization, and at the same time reducing material waste; the Teflon plate 6 is used to isolate the tube bundle 2 and the steel plate 5, avoiding the formation of a conductive path between the electrolytic cell anode plate 11 and the electrolytic cell cathode plate 12 and the boss 3, channel steels 4 and steel plates 5 at the bottom, etc., so as to improve the overall electrolysis efficiency.

[0030] As Figure 3 shown, as an optimization, the tube bundle 2 includes an anode tube bundle 13 and a cathode tube bundle 14;

[0031] The anode tube bundle 13 includes anode horizontal tubes 15 and anode vertical tubes 16, and the anode horizontal tubes 15 and the anode vertical tubes 16 are arranged in a layered and staggered manner;

[0032] The cathode tube bundle 14 includes cathode horizontal tubes 17 and cathode vertical tubes 18, and the cathode horizontal tubes 17 and the cathode vertical tubes 18 are arranged in a layered and staggered manner.

[0033] The anode tube group 13 is used to improve the conductivity efficiency of the electrolyte in the anode chamber 8, and the cathode tube group 14 is used to improve the conductivity efficiency of the electrolyte in the cathode chamber 9;

[0034] The cathode tube group 14 includes a cathode horizontal tube 17 and a cathode vertical tube 18, which are arranged in layers between the cathode horizontal tube 17 and the cathode vertical tube 18. This arrangement helps to optimize the distribution of the cathodic protection current. Through a reasonable layered design, it can ensure that the current is evenly distributed on the surface of the pipeline, reduce the phenomenon of local overprotection or underprotection, and thus improve the overall efficiency of cathodic protection;

[0035] The beneficial effect of the arrangement method of the anode tube group 13 is the same as that of the cathode tube group 14.

[0036] Such as Figure 2 shown, as an optimization, the steel plates 5 are welded together, and the steel plates 5 on the outside are welded to the tank shell 1.

[0037] Such as Figure 2 shown, as an optimization, the number of steel plates 5 is greater than or equal to 7.

[0038] As an optimization, the number of steel plates 5 is 7.

[0039] Such as Figure 2 shown, as an optimization, a weld chamfer 19 is opened at the corners of the steel plate 5, and the value range of the weld chamfer 19 is 10 mm - 15 mm.

[0040] The weld chamfer 19 provides space for the filling of the welding fluid between the steel plates 5 and between the steel plate 5 and the tank shell 1. As an optimization, the value of the weld chamfer 19 can be 10 mm, 12.5 mm or 15 mm.

[0041] Such as Figure 4 shown, as an optimization, the value range of the height of the boss 3 is 195 mm - 205 mm.

[0042] As an optimization, the value of the height of the boss 3 can be 195 mm, 200 mm or 205 mm.

[0043] Working process or working principle:

[0044] On the premise of ensuring the normal operation of the tank shell 1, the height of the boss 3 of the tank shell 1 is 200 mm, which can improve the crystallization condition at the bottom of the material and reduce the material waste at the same time; the test electrolytic cell body is emptied for overhaul, the distance from the bottom to the cathode plate 12 of the electrolytic cell is 306 mm, and 7 steel plates 5 (1532 mm * 469 mm * 10 mm) are laid flat at the position 200 mm upward from the bottom and supported by channel steels 4 at the bottom. The model of the channel steel 4 is No. 10. The interfaces between the steel plates 5 and between the steel plates 5 and the tank body are beveled to increase the welding area, and full welding is carried out with carbon steel welding wires. A polytetrafluoroethylene plate 6 is inserted between the steel plate 5 and the tube bank, and steady pins are welded on the edge of the steel plate 5 to fix the polytetrafluoroethylene plate 6;

[0045] It is estimated that the feeding amount per time will be reduced from the original 4900 kg to 3700 kg, and the normal production will not be affected at the same time.

[0046] In the present utility model, the description of the direction and relative position relationship of the structure, such as the description of front, back, left, right, up and down, does not constitute a limitation to the present utility model, but is only for the convenience of description.

Claims

1. An electrolytic cell bottom plate elevation technical transformation device, characterized in that, It includes a trough shell (1), and a tube bundle group (2) is arranged inside the trough shell (1); A boss (3) is provided at the bottom of the trough shell (1), several channel steels (4) are arranged on the top of the boss (3), several steel plates (5) are welded on the top of the channel steels (4), and a tetrafluoroethylene plate (6) is arranged between the steel plate (5) and the tube bundle group (2); A skirt plate (7) is provided in the middle of the trough shell (1), the left side of the skirt plate (7) is an anode chamber (8), the right side of the skirt plate (7) is a cathode chamber (9), and the anode chamber (8) and the cathode chamber (9) are communicated through a nitrogen pipeline (10); An electrolytic cell anode plate (11) is placed in the anode chamber (8), and an electrolytic cell cathode plate (12) is placed in the cathode chamber (9).

2. The electrolytic cell bottom plate elevation technical renovation equipment according to claim 1, characterized in that, The tube bundle group (2) includes an anode tube bundle group (13) and a cathode tube bundle group (14); The anode tube bundle group (13) includes anode transverse tubes (15) and anode longitudinal tubes (16), and the anode transverse tubes (15) and the anode longitudinal tubes (16) are arranged in a layered and staggered manner; The cathode tube bundle group (14) includes cathode transverse tubes (17) and cathode longitudinal tubes (18), and the cathode transverse tubes (17) and the cathode longitudinal tubes (18) are arranged in a layered and staggered manner.

3. The electrolytic cell bottom plate elevation technical renovation equipment according to claim 2, characterized in that, The steel plates (5) are integrally formed by welding, and the steel plates (5) located on the outside are connected to the trough shell (1) by welding.

4. The electrolytic cell bottom plate elevation technical transformation equipment according to claim 3, characterized in that, The number of the steel plates (5) is greater than or equal to 7.

5. The electrolytic cell bottom plate elevation technical renovation equipment according to claim 4, characterized in that, Weld chamfers (19) are provided at the corners of the steel plates (5), and the value range of the weld chamfers (19) is 10mm - 15mm.

6. The electrolytic cell bottom plate elevation technical transformation equipment according to claim 5, characterized in that, The value range of the height of the boss (3) is 195mm - 205mm.

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