CN211522335U

CN211522335U - Electrolytic bath for producing fluorine by electrolysis

Info

Publication number: CN211522335U
Application number: CN201821062955.XU
Authority: CN
Inventors: 张怀; 朱进京; 徐洪涛; 侯玲玲; 牛学坤; 汪建春
Original assignee: Liming Research Institute of Chemical Industry Co Ltd
Current assignee: Haohua Gas Co Ltd
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2020-09-18
Anticipated expiration: 2028-06-29

Abstract

The utility model discloses an electrolysis fluorine electrolytic cell, including cell body (1), electrolyte contact tube (4), power pump (5), filter (6), heat exchanger (10), electrolyte derivation pipeline (4) connect into the return circuit that upper portion advances that goes out in the cell body outside lateral wall in the lower part, according to the return circuit carrier flow direction, has connected gradually power pump (5), filter (6), heat exchanger (10) on the electrolyte derivation pipeline. This electrolysis trough has cancelled central cooling tube and cooling water jacket, adopts the outer circulation cooling of electrolysis trough, has solved electrolysis trough central cooling tube or cooling water jacket corrosion problem, has especially avoided central cooling tube to corrode the back cooling water and has got into in the electrolysis trough and make electrolyte scrap, produces the hidden danger of explosion even, still simplifies electrolysis trough equipment process simultaneously.

Description

Electrolytic bath for producing fluorine by electrolysis

Technical Field

The utility model relates to an electrolytic bath for industrial electrolytic fluorine production.

Background

At present, the accepted industrial electrolysis fluorine-making electrolytic cell is used for controlling the temperature of the fluorine-making electrolytic cell in a mode that a central heat exchange pipe is arranged inside the electrolytic cell and a cell body cooling water jacket is combined, but the structure of the fluorine-making electrolytic cell has corrosion problems, and particularly the corrosion conditions of heat exchange parts such as the central cooling pipe and the cooling water jacket are more serious. After the central cooling pipe or the jacket of the electrolytic cell is corroded, cooling water in the cooling pipe or the jacket leaks into the electrolytic cell, so that electrolyte is scrapped, and explosion danger can be generated. The existing solution is to use Monel alloy to make the electrolytic bath material partially or totally, but this will increase the cost of the equipment.

The special cooling water jacket needs to be welded around the outer wall of the electrolytic cell in the manufacturing process of the electrolytic cell, the central cooling pipe needs to be connected with the cover plate of the electrolytic cell in the assembling process, and the cooling water jacket and the central cooling pipe after the electrolytic cell is assembled need to be connected with a cooling water system through special connecting pipes and matching connectors. Need carry out insulation treatment to central cooling pipe and apron junction in the electrolysis trough equipment, in case insulation treatment is improper, can lead to central cooling pipe and cooling water jacket cathodic protection measure to lose efficacy to cause the corruption to accelerate in the use.

Based on the electrolytic bath for producing fluorine by electrolysis in the prior art, the electrolysis process has the following problems: in the electrolytic process, the electrolyte is in a static state, and impurities can be generated on the electrode plate and bubbles are attached to the electrode plate and cannot escape in time, so that the resistance is increased, the voltage is increased, the polarization phenomenon is promoted, and the power consumption is increased. Meanwhile, impurities such as carbon powder on the surface layer of the electrolyte can reduce the contact area between the polar plate and the electrolyte, so that the electrolysis efficiency is reduced.

Disclosure of Invention

The invention aims to provide an electrolytic cell for producing fluorine by electrolysis, which has long service life, can reduce the resistance of electrolyte, reduce power consumption and improve the electrolysis efficiency.

In order to solve the technical problems, the technical scheme of the invention is as follows: an electrolytic cell for producing fluorine by electrolysis comprises a cell body 1, an electrolyte outlet pipe 4, a power pump 5, a filter 6 and a heat exchanger 10, wherein an electrolyte outlet pipeline 4 is connected with the outer side wall of the cell body to form a loop with the lower part being out of the upper part and entering the loop, and the power pump 5, the filter 6 and the heat exchanger 10 are sequentially connected on the electrolyte outlet pipeline according to the flow direction of a loop carrier.

Furthermore, the parallel filter is provided with a bypass valve, so that the filter can be replaced or maintained conveniently, and the normal operation of the electrolytic cell is ensured.

Furthermore, be provided with nitrogen gas on electrolyte derivation pipeline and sweep the pipe, be furnished with the manometer on sweeping the pipe, utilize nitrogen gas to sweep the electrolyte derivation pipe easy to overhaul and prevent that electrolyte from blockking up the pipeline. When equipment or valve on the pipeline broke down, usable nitrogen gas was swept the inside electrolyte of electrolyte delivery pipe, and the liquid in the clean pipe of row is in order to maintain equipment, and the setting of manometer is used for showing nitrogen gas and sweeps pressure in order to control pressure.

The electrolyte delivery pipe is suitably made of a pipeline resistant to the acidity and temperature of the electrolyte.

The working mode of the electrolytic cell for producing fluorine by electrolysis is as follows: the electrolyte is led out from the bottom of the electrolytic cell by an acid-proof pump or other power devices, the solid or other impurities are filtered out by the electrolyte through a filter, and the electrolyte enters the electrolytic cell for electrolysis after being cooled to the electrolysis temperature in a heat exchanger.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the electrolytic tank central cooling pipe and the cooling water jacket are eliminated, the electrolytic tank extracorporeal circulation cooling is adopted, the problem of corrosion of the electrolytic tank central cooling pipe or the cooling water jacket is solved, particularly, the hidden danger of electrolyte scrapping and even explosion caused by cooling water entering the electrolytic tank after the central cooling pipe is corroded is avoided, and meanwhile, the electrolytic tank assembling process is simplified.

2. The filter is arranged on the electrolyte leading-out pipeline, electrolyte impurities are filtered, the electrolyte resistance can be reduced, the power consumption is reduced, and the electrolysis efficiency is improved.

3. Under the working method of electrolysis fluorine electrolytic cell, electrolyte circulation flow no longer is quiescent condition, and the plate electrode is constantly washed away to mobile electrolyte, makes impurity and the bubble of attaching to on the polar plate break away from rapidly, increases the electrolysis effective area of plate electrode, makes plate electrode and electrolyte fully contact reaction, and increase of production still can reduce resistance and interelectrode voltage simultaneously, is favorable to improving electrolysis efficiency.

Drawings

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

Wherein: 1. electrolytic bath body 2, nitrogen purging pipe 3, pressure gauge 4, electrolyte eduction tube 5, power pump 6, filter 7, bypass valve 8, refrigerant inlet 9, refrigerant outlet 10 and heat exchanger

Detailed Description

The present patent is described in further detail below with reference to examples and drawings, but the embodiments of the present patent are not limited thereto.

Example 1

An electrolytic cell for producing fluorine by electrolysis, as shown in figure 1, comprises a cell body 1, an electrolyte outlet pipe 4, a power pump 5, a filter 6 and a heat exchanger 10, wherein an electrolyte outlet pipeline 4 is connected with the side wall of the cell body to form a loop with the lower part being out of the upper part and entering, the power pump 5, the filter 6 and the heat exchanger 10 are sequentially connected on the electrolyte outlet pipeline according to the flow direction of a loop carrier, the filter 6 is connected with a bypass valve 7 in parallel, a tee joint is arranged on the electrolyte outlet pipeline and connected with a nitrogen purging 2 pipe, and a pressure gauge 3 is arranged on the nitrogen purging pipe.

Because the electrolytic cell for producing fluorine by electrolysis does not have a central cooling pipe and a cooling water jacket, after the central cooling or the corrosion of the parts easy to corrode, such as the jacket, and the like, the cooling water leaks into the electrolytic cell to scrap the electrolyte, even to generate the hidden danger of explosion, and meanwhile, the assembling process of the electrolytic cell is simplified. Electrolyte circulates under the effect of power pump in this system fluorine electrolysis cell working process and flows, observes that flowing electrolyte ceaselessly erodees the plate electrode, makes impurity and the bubble of attaching to on the polar plate break away from rapidly, must increase the electrolysis effective area of plate electrode, impels plate electrode and electrolyte abundant contact reaction, still can reduce resistance and interelectrode voltage simultaneously, is favorable to improving electrolysis efficiency.

Claims

1. An electrolytic cell for producing fluorine by electrolysis is characterized by comprising a cell body (1), an electrolyte delivery pipe (4), a power pump (5), a filter (6) and a heat exchanger (10), wherein the electrolyte delivery pipe (4) is connected with the outer side wall of the cell body to form a loop with the lower part going out and the upper part going in, the power pump (5), the filter (6) and the heat exchanger (10) are sequentially connected on the electrolyte delivery pipe (4) according to the flow direction of a loop carrier, and a bypass valve (7) is arranged in parallel with the filter (6); the electrolyte outlet pipe (4) is provided with a nitrogen purging pipe (2), and the purging pipe is provided with a pressure gauge (3).