CN217266042U

CN217266042U - Safe and intelligent electrolytic fluorine production device

Info

Publication number: CN217266042U
Application number: CN202220108393.8U
Authority: CN
Inventors: 刘岳尘; 郝晋川
Original assignee: Sichuan Jinghu Technology Co Ltd
Current assignee: Sichuan Jinghu Technology Co Ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-08-23
Anticipated expiration: 2032-01-17

Abstract

The utility model discloses a safe and intelligent electrolytic fluorine production device, which comprises an electrolytic bath, wherein the bottom of the electrolytic bath is tightly connected with a cathode to form an integrated structure, and the outside of the bottom of the electrolytic bath is connected with a cathode conductive copper bar, so that the contact area between the cathode and the electrolytic bath is increased; a cover plate is covered above the electrolytic cell, a plurality of openings for the copper hanging frames to penetrate through are formed in the cover plate, and the copper hanging frames are connected with the anode conductive copper bars outside the electrolytic cell; the anode conductive copper bar and the cathode conductive copper bar are respectively connected with a power supply. The utility model adopts the integrated design of the cell body and the cathode, thereby effectively avoiding the problem of corrosion of the electrolyte to the cell body and greatly prolonging the service life of the electrolytic cell; meanwhile, the feeding accuracy is effectively improved, and potential safety hazards caused by frequent contact of operators with hydrogen fluoride are avoided; the operation safety of the electrolytic fluorine preparation system is greatly improved; effectively improving the stability of the electrolytic cell and the safety of the fluorine production system.

Description

Safe and intelligent electrolytic fluorine production device

Technical Field

The utility model belongs to the technical field of electrolysis fluorine system, concretely relates to safe intelligent electrolysis fluorine system device.

Background

Along with the rapid expansion of the application field of fluorine, new fluorine-containing chemicals are continuously developed and are continuously upgraded towards the high-efficiency, energy-saving and environment-friendly directions. The fluorine-making electrolytic bath adopted at home in the past continues to use foreign technologies, and in order to avoid the corrosion of electrolyte to metal elements in the bath body, a large amount of expensive alloy materials are adopted as the main body part of the electrolytic bath. From the last 60 years to present, fluorine-making electrolytic cells have evolved from high-temperature electrolytic cells made of all-magnesium alloy to medium-temperature electrolytic cells made of all-nickel alloy, and at present, electrolytic cells made of carbon steel mainly and a small amount of nickel alloy are widely adopted in China, so that the fluorine-making cost is continuously reduced, and the fluorine-making capacity is continuously improved. However, due to the strong corrosiveness of the raw materials for producing fluorine by electrolysis, various electrolytic cells can not get rid of the disadvantages of easy corrosion, short service life, poor working environment, high labor intensity, low safety and the like all the time.

At present, the fluorine-making electrolytic cell in China generally adopts a design of separating a cell body from a cathode, and a cathode frame needs to be additionally processed in the processing process. In the installation process, the cathode frame is required to be firstly arranged in the tank body and then the anode is required to be arranged. Therefore, the assembly is complicated, the cathode busbar is required to be detached during maintenance, and the maintenance workload is increased. The requirement on the processing size of the cathode frame is also high, the cathode frame is easy to corrode and deform during operation, and a sealing procedure is added. Most importantly, the cell body and the heat exchange tube of the electrolytic cell are extremely easy to corrode under the action of electrolyte, so that electrolyte impurities are increased to influence the operation efficiency, the service life of the electrolytic cell is shortened, and meanwhile, the personal safety, the equipment safety and the environment are greatly threatened.

The traditional fluorine-making electrolytic cell adopts a manual mode when hydrogen fluoride is fed, and operators frequently contact with the hydrogen fluoride, so that safety accidents are easily caused. In the aspect of liquid level control of electrolyte, manual regular measurement is adopted, once a heat exchange water pipe in a tank is corroded and leaks water, if the corrosion and the water leakage cannot be found in time, serious consequences are caused to the whole production system, personal and equipment safety is endangered, and environmental pollution is caused. Because the cathode and anode pressure is easy to fluctuate in the system condition during the operation of the electrolytic cell, the traditional method sets a limit value, and the electrolytic cell is forcibly powered off when the limit value is exceeded so as to protect equipment. After long-term research and improvement, the inventor develops a series of intelligent fluorine-making electrolytic cells which are mainly made of carbon steel, such as 3KA,5KA,10KA and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a safe and intelligent electrolytic fluorine production device.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

a safe and intelligent electrolytic fluorine production device comprises an electrolytic cell, wherein the bottom of the inner side of the electrolytic cell is tightly connected with a cathode to form an integrated structure, and a cathode conductive copper bar is connected to the outside of the bottom of the electrolytic cell, so that the contact area between the cathode and the electrolytic cell is increased; a cover plate is covered above the electrolytic cell, a plurality of openings for the copper hanging frames to penetrate through are formed in the cover plate, and the copper hanging frames are connected with the anode conductive copper bars outside the electrolytic cell; the anode conductive copper bar and the cathode conductive copper bar are respectively connected with a power supply.

The automatic feeding and purging system comprises an HF steel cylinder, an electronic scale and a DCS central control system, the HF steel cylinder conveys hydrogen fluoride to the inside of the electrolytic bath through a pipeline, and the electronic scale is arranged below the HF steel cylinder to monitor the usage amount of HF of the HF steel cylinder; meanwhile, a DCS central control system is respectively connected with the HF steel cylinder control valve and interlocked with the power supply and the electronic scale information, and automatically controls the hydrogen fluoride feeding amount of the HF steel cylinder according to the hydrogen fluoride consumption amount consumed by the operation of the electrolytic cell so as to ensure the acidity of the electrolyte in the electrolytic cell; after the charging is finished, the DCS central control system automatically controls the external equipment to send nitrogen to purge the charging pipeline.

Further, still include automatic monitoring liquid level system, automatic monitoring liquid level system includes the radar level gauge, and the radar level gauge setting is inside the electrolysis trough, with power, heat transfer circulating water valve information interlocking, when the radar level gauge monitored that the liquid level appears unusually, heat transfer circulating water valve self-closing and power auto-power-off.

The system further comprises an automatic pressure balancing system, wherein the automatic pressure balancing system comprises a tail gas processor and pressure sensors arranged at the anode and the cathode, the two pressure sensors are interlocked with control valve information arranged in a gas pipeline, and when abnormal pressure rise is detected, the control valve is automatically opened, gas is introduced into the tail gas pipeline and is discharged from the tail gas processor; and if the abnormal pressure reduction is detected, automatically supplementing the inert gas.

Compared with the prior art, the beneficial effects of the utility model are that: the equipment processing cost is reduced, and the overhauling and mounting time is shortened; the safety of fluorine preparation by electrolysis is improved; the field does not need to be attended by personnel, so that the labor cost is saved; leakage points between the cover plate and the groove body are reduced, and the tightness is enhanced; effectively improves the corrosion condition of the medium-temperature electrolytic tank, reduces the generation of waste water and dangerous solid wastes, and protects the environment.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a schematic view of the overall connection structure of the present invention.

In the figure, 1-an electrolytic cell, 2-a cover plate, 3-an anode conductive copper bar, 4-a copper hanger, 5-a cathode, 6-a power supply and 7-a cathode conductive copper bar; 8-radar liquid level meter, 9-HF steel cylinder, 10-electronic scale, 11-DCS central control system and 12-tail gas processor.

Detailed Description

The present invention is described below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.

A safe and intelligent electrolytic fluorine production device is shown in figures 1 to 2 and comprises an electrolytic cell 1, wherein the bottom of the inner side of the electrolytic cell 1 is tightly connected with a cathode 5 to form an integrated structure, and a cathode conductive copper bar 7 is connected to the outside of the bottom of the electrolytic cell 1, so that the contact area between the cathode 5 and the electrolytic cell 1 is increased; a cover plate 2 is covered above the electrolytic cell 1, a plurality of openings for the copper hanging brackets 4 to penetrate through are arranged on the cover plate 2, and the copper hanging brackets 4 are connected with an anode conductive copper bar 3 outside the electrolytic cell 1; the anode conductive copper bar 3 and the cathode conductive copper bar 7 are respectively connected with a power supply 6;

the automatic liquid level monitoring system also comprises an automatic feeding and purging system, an automatic liquid level monitoring system and an automatic pressure balancing system; the automatic feeding and purging system comprises an HF steel cylinder 9, an electronic scale 10 and a DCS central control system 11, wherein the HF steel cylinder 9 conveys hydrogen fluoride to the inside of the electrolytic cell 1 through a pipeline, and the electronic scale 10 is arranged below the HF steel cylinder 9 to monitor the usage amount of HF of the HF steel cylinder 9; meanwhile, a DCS (distributed control System) 11 is respectively connected with a control valve of the HF steel cylinder 9 and is interlocked with the power supply 6 and the electronic scale 10, and the DCS 11 automatically controls the hydrogen fluoride feeding amount of the HF steel cylinder 9 according to the hydrogen fluoride consumption amount of the electrolytic cell 1 during operation so as to ensure the acidity of the electrolyte in the electrolytic cell 1; after the feeding is finished, the DCS central control system 11 automatically controls external equipment to send nitrogen to purge a feeding pipeline;

the automatic liquid level monitoring system comprises a radar liquid level meter 8, the radar liquid level meter 8 is arranged in the electrolytic tank 1 and is interlocked with the power supply 6 and the heat exchange circulating water valve, and when the radar liquid level meter 8 monitors that the liquid level is abnormal, the heat exchange circulating water valve is automatically closed and the power supply 6 is automatically powered off;

the automatic pressure balancing system comprises a tail gas processor 12 and pressure sensors arranged at the anode and the cathode, the two pressure sensors are interlocked with control valve information arranged in a gas pipeline, when abnormal pressure rise is detected, the control valve is automatically opened, and gas is introduced into the tail gas pipeline and is discharged from the tail gas processor 12; and if the abnormal pressure reduction is detected, automatically supplementing the inert gas.

The utility model discloses a theory of operation:

(1) the integrated design of the cell body and the cathode is adopted, so that the problem of corrosion of electrolyte to the cell body is effectively avoided, and the service life of the electrolytic cell is greatly prolonged;

(2) an automatic feeding system is adopted, so that the feeding accuracy is effectively improved, and potential safety hazards caused by frequent contact of operators with hydrogen fluoride are avoided;

(3) the liquid level monitoring alarm automatic cut-off system is adopted, so that the system can be immediately and automatically closed when the heat exchange tube of the electrolytic cell is corroded and leaks water, and the operation safety of the electrolytic fluorine production system is greatly improved;

(4) the automatic compensating system for monitoring the cathode and anode pressures of the electrolytic cell is adopted, so that inert gas can be automatically introduced or gas can be introduced into the tail gas purification system when the pressures of the two electrodes of the electrolytic cell fluctuate abnormally, normal pressure is maintained, and the stability of the electrolytic cell and the safety of a fluorine production system are effectively improved.

Claims

1. A safe and intelligent electrolytic fluorine production device is characterized by comprising an electrolytic cell, wherein the bottom of the inner side of the electrolytic cell is tightly connected with a cathode to form an integrated structure, and a cathode conductive copper bar is connected to the outside of the bottom of the electrolytic cell, so that the contact area between the cathode and the electrolytic cell is increased; a cover plate is covered above the electrolytic cell, a plurality of openings for the copper hanging frames to penetrate through are formed in the cover plate, and the copper hanging frames are connected with the anode conductive copper bars outside the electrolytic cell; the anode conductive copper bar and the cathode conductive copper bar are respectively connected with a power supply.

2. A safe and intelligent apparatus for producing fluorine by electrolysis according to claim 1, further comprising an automatic supply and purge system comprising an HF cylinder for supplying hydrogen fluoride to the inside of the electrolytic cell through a pipe, an electronic scale, and a DCS central control system, and wherein the electronic scale is disposed below the HF cylinder to monitor the amount of HF used by the HF cylinder; simultaneously, a DCS central control system is respectively connected with the HF steel cylinder control valve and interlocked with the power supply and the electronic scale information, and the DCS central control system automatically controls the hydrogen fluoride feeding amount of the HF steel cylinder according to the hydrogen fluoride amount consumed by the operation of the electrolytic cell so as to ensure the acidity of the electrolyte in the electrolytic cell; after the charging is finished, the DCS central control system automatically controls the external equipment to send nitrogen to purge the charging pipeline.

3. The apparatus of claim 1, further comprising an automatic liquid level monitoring system, wherein the automatic liquid level monitoring system comprises a radar level gauge, the radar level gauge is disposed inside the electrolytic cell and interlocked with the power supply and the heat exchange circulating water valve, and when the radar level gauge detects that the liquid level is abnormal, the heat exchange circulating water valve is automatically closed and the power supply is automatically powered off.

4. A safe and intelligent apparatus for producing fluorine by electrolysis according to claim 1, further comprising an automatic pressure balancing system, wherein the automatic pressure balancing system comprises a tail gas processor and pressure sensors disposed at both the anode and cathode, the two pressure sensors are interlocked with information of a control valve disposed in the gas pipeline, and when an abnormal rise in pressure is detected, the control valve is automatically opened to introduce gas into the tail gas pipeline and remove the gas from the tail gas processor; and if the abnormal pressure reduction is detected, automatically supplementing the inert gas.