CN213668604U

CN213668604U - Automatic cleaning device for eliminating alkaline mist of electrolytic cleaning tank

Info

Publication number: CN213668604U
Application number: CN202022121041.XU
Authority: CN
Inventors: 陈代兵; 李晓龙
Original assignee: Jiuquan Iron and Steel Group Co Ltd
Current assignee: Jiuquan Iron and Steel Group Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-13
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to an automatic cleaning device for eliminating electrolytic cleaning tank alkali fog, including setting up in the alkali fog washing case of electrolytic cleaning tank one side, the lateral wall that the case was washd to alkali fog is connected with the breather pipe, the other end of breather pipe is connected with electrolytic cleaning tank's lateral wall, alkali fog washs the incasement and is equipped with a plurality of shower nozzles, the bottom that the case was washd to alkali fog is connected with the demineralized water tank, and the demineralized water tank is connected with the outer end of raceway, and the upper portion and the lower part of demineralized water tank are connected with inlet tube and outlet pipe respectively, be equipped with first solenoid valve on the inlet tube, be equipped with the second. The utility model cleans the alkali fog by spraying demineralized water to remove the sodium hydroxide in the alkali fog, and has good cleaning effect, high efficiency and rapidness; the desalted water for cleaning the alkali mist is recycled, so that the energy is saved and the environment is protected; the PID controller is arranged to compare and analyze the concentration of the sodium hydroxide in the desalting water tank, and the automatic control is realized by adjusting, so that the labor is saved.

Description

Automatic cleaning device for eliminating alkaline mist of electrolytic cleaning tank

Technical Field

The utility model belongs to the technical field of alkali fog processing apparatus, a an automatic cleaning device for eliminating electrolysis washing tank alkali fog is related to.

Background

In modern continuous steel strip production lines, the metal surfaces are required to be clean and oil stains, rust and the like must be cleaned. The steel strip is cleaned by an electrolytic cleaning mode which takes sodium hydroxide as a solution, and the mode can meet the requirement of high-speed production. Meanwhile, in order to improve the cleaning effect, the temperature of the alkali liquor is generally controlled to be about 60 ℃, but a large amount of alkali liquor is volatilized and diffused in the electrolytic bath. Meanwhile, during the electrolysis process, water is decomposed into a small amount of hydrogen and oxygen and bubbles are generated, so that the volatilization degree of the alkali liquor is increased. If more and more hydrogen and oxygen accumulate in the electrolytic cell, alkali mist is formed, and if too much alkali mist can cause explosion accidents, the alkali mist must be discharged out of the tank body. And the sodium hydroxide in the alkali fog needs to be purified and can be discharged to the atmosphere. Therefore, the stability and operability of the apparatus for purifying the alkali mist are important.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provide an automatic cleaning device for eliminating alkaline fog in an electrolytic cleaning tank.

Therefore, the utility model adopts the following technical scheme:

an automatic cleaning device for eliminating alkali fog of an electrolytic cleaning tank comprises an alkali fog cleaning tank arranged on one side of the electrolytic cleaning tank, wherein the alkali fog cleaning tank is of a closed structure, the side wall of the alkali fog cleaning tank is connected with a vent pipe, the other end of the vent pipe is connected with the side wall of the electrolytic cleaning tank, a fan is arranged on the vent pipe, a water delivery pipe is arranged in the alkali fog cleaning tank, the water delivery pipe is positioned at the top of the alkali fog cleaning tank, one end of the water delivery pipe extends out of the alkali fog cleaning tank, a plurality of spray heads are arranged on the water delivery pipe, the spray heads are positioned in the alkali fog cleaning tank, a water discharge pipe is arranged at the bottom of the alkali fog cleaning tank, the other end in the water discharge pipe is connected with a desalting water tank, the bottom of the side wall of the desalting water tank is provided with a liquid level transmitter, the desalting water tank is connected with the outer end of the water, the water inlet pipe is provided with a first electromagnetic valve, and the water outlet pipe is provided with a second electromagnetic valve.

Further, the liquid level transmitter is connected with a first PID controller, the first PID controller is connected with a first PLC controller, and the first PLC controller is connected with a second electromagnetic valve.

Further, the concentration analyzer is connected with a second PID controller, the second PID controller is connected with a second PLC controller, and the second PLC controller is connected with the first electromagnetic valve.

Further, an exhaust funnel is arranged at the top of the alkali fog cleaning box.

The beneficial effects of the utility model reside in that: the alkali fog is cleaned by spraying demineralized water, so that sodium hydroxide in the alkali fog is removed, the cleaning effect is good, and the cleaning is efficient and rapid; the desalted water for cleaning the alkali mist is recycled, so that the energy is saved and the environment is protected; the PID controller is arranged to compare and analyze the concentration of the sodium hydroxide in the desalting water tank, and the automatic control is realized by adjusting, so that the labor is saved.

Drawings

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

FIG. 2 is a control schematic diagram of the present invention;

in the figure, 1-an electrolytic cleaning tank, 2-an alkali fog cleaning tank, 3-an air pipe, 4-a fan, 5-a water conveying pipe, 6-a spray head, 7-a water discharging pipe, 8-a desalted water tank, 9-a liquid level transmitter, 10-a water pump, 11-a concentration analyzer, 12-a water inlet pipe, 13-a water outlet pipe, 14-a first electromagnetic valve, 15-a second electromagnetic valve, 16-a first PID controller, 17-a first PLC controller, 18-a second PID controller, 19-a second PLC controller and 20-an exhaust funnel.

Detailed Description

As shown in figure 1, an automatic cleaning device for eliminating alkali fog of an electrolytic cleaning tank comprises an alkali fog cleaning box 2 arranged on one side of the electrolytic cleaning tank 1, wherein the electrolytic cleaning tank 1 is a conventional cleaning tank in the field, the alkali fog cleaning box 2 is of a closed structure, the side wall of the alkali fog cleaning box 2 is connected with a vent pipe 3, the other end of the vent pipe 3 is connected with the side wall of the electrolytic cleaning tank 1, the alkali fog generated in the electrolytic cleaning tank 1 can enter the alkali fog cleaning box 2 through the vent pipe 3 for treatment, a fan 4 is arranged on the vent pipe 3, the fan 4 in the embodiment adopts a 30kW centrifugal fan, the fan 4 can quickly suck the alkali fog into the alkali fog cleaning box 2 to improve the cleaning efficiency, a water conveying pipe 5 is arranged in the alkali fog cleaning box 2, the water conveying pipe 5 is positioned at the top of the alkali fog cleaning box 2, one end of the water conveying pipe 5 extends out of the alkali, the shower nozzle 6 is located the alkali fog and washs case 2 in, and shower nozzle 6 can wash case 2 spraying demineralized water to alkali fog, washs alkali fog through demineralized water, and then purifies the sodium hydroxide.

The bottom of the alkali fog cleaning box 2 is provided with a drain pipe 7, the other end of the drain pipe 7 is connected with a demineralized water tank 8, the demineralized water after cleaning can be recycled through the drain pipe 7, the bottom of the side wall of the demineralized water tank 8 is provided with a liquid level transmitter 9, the liquid level transmitter 9 is a Rosemont 3051L liquid level transmitter and is used for detecting the water level height in the demineralized water tank 8, the demineralized water tank 8 is connected with a water conveying pipe 5, the water conveying pipe 5 is provided with a water pump 10 and a concentration analyzer 11, the concentration analyzer 11 is used for detecting the concentration of sodium hydroxide in the demineralized water and is used for judging whether the demineralized water in the demineralized water tank 8 can be continuously utilized or not, the upper part and the lower part of the demineralized water tank 8 are respectively connected with a water inlet pipe 12 and a water outlet pipe 13, the water inlet pipe 12 is used for adding demineralized water into the demineralized water tank 8, the water inlet pipe 12 is provided with, the top of the alkali fog cleaning box 2 is provided with an exhaust funnel 20, and the purified gas reaching the standard can be discharged through the exhaust funnel 20.

In order to realize the automatic control of the cleaning process, the liquid level transmitter 9 is connected with a first PID controller 16, the first PID controller 16 is connected with a first PLC (programmable logic controller) 17, the first PLC controller 17 is connected with a second electromagnetic valve 15, the first PID controller 16 is used for comparing and detecting the water level in the desalting water tank 8, when the water level is higher than a set value, a signal is sent to the first PLC controller 17, and the first PLC controller 17 controls the second electromagnetic valve 15 to open and drain water.

Meanwhile, the concentration analyzer 11 is connected with a second PID controller 18 for comparing the concentration of sodium hydroxide in the desalted water tank 8, the second PID controller 18 is connected with a second PLC controller 19, the second PLC controller 19 is connected with the first solenoid valve 14, the second PID controller 18 is used for comparing the concentration of sodium hydroxide in the desalted water tank 8, when the concentration is higher than a set value, a signal is sent to the second PLC controller 19, and the second PLC controller 19 controls the first solenoid valve 14 to open to add water into the desalted water tank 8, so as to reduce the concentration of sodium hydroxide.

The working principle of the utility model is as follows:

after the steel strip is cleaned in the electrolytic cleaning tank 1 by electrolysis, alkali fog is generated in the electrolytic cleaning tank 1, the alkali fog enters the alkali fog cleaning tank 2 through the vent pipe 3 under the action of the fan 4, at the moment, demineralized water in the demineralized water tank 8 is sprayed into the alkali fog cleaning tank 2 from the spray head 6 through the water conveying pipe 5 under the action of the water pump 10 to clean the alkali fog, and the standard-reaching gas after cleaning is discharged through the exhaust funnel 20.

The desalted water sprayed out in the cleaning process can be conveyed back into the desalted water tank 8 through a drain pipe 7 at the bottom of the alkali fog cleaning tank 2 for recycling, a concentration analyzer 11 on the water pipe 5 can analyze the concentration of sodium hydroxide in the desalted water tank 8, the concentration value is conveyed into a second PID controller 18 to be compared with the set concentration, when the concentration is higher than the set value, a signal is sent to a second PLC controller 19, and the second PLC controller 19 controls a first electromagnetic valve 14 to be opened to add desalted water into the desalted water tank 8 so as to reduce the concentration of the sodium hydroxide in the desalted water tank 8;

in addition, the liquid level transmitter 9 can detect the water level in the demineralized water tank 8, send the relevant information to the first PID controller 16 to compare with the set value, send a signal to the first PLC controller 17 when the water level is higher than the set value, and the first PLC controller 17 controls the second solenoid valve 15 to open the drain to ensure that the water level in the demineralized water tank 8 is maintained within the set range.

Claims

1. The automatic cleaning device for eliminating the alkali fog of the electrolytic cleaning tank is characterized by comprising an alkali fog cleaning tank (2) arranged on one side of the electrolytic cleaning tank (1), wherein the alkali fog cleaning tank (2) is of an airtight structure, the side wall of the alkali fog cleaning tank (2) is connected with a vent pipe (3), the other end of the vent pipe (3) is connected with the side wall of the electrolytic cleaning tank (1), a fan (4) is arranged on the vent pipe (3), a water conveying pipe (5) is arranged in the alkali fog cleaning tank (2), the water conveying pipe (5) is positioned at the top of the alkali fog cleaning tank (2), one end of the water conveying pipe (5) extends out of the alkali fog cleaning tank, a plurality of spray heads (6) are arranged on the water conveying pipe (5), the spray heads (6) are positioned in the alkali fog cleaning tank (2), a drain pipe (7) is arranged at the bottom of the alkali fog cleaning tank (2), and the other end of the drain pipe (7) is, the bottom of demineralized water tank (8) lateral wall is equipped with liquid level changer (9), and demineralized water tank (8) are connected with raceway (5), be equipped with water pump (10) and concentration analyzer (11) on raceway (5), the upper portion and the lower part of demineralized water tank (8) are connected with inlet tube (12) and outlet pipe (13) respectively, be equipped with first solenoid valve (14) on inlet tube (12), be equipped with second solenoid valve (15) on outlet pipe (13).

2. The automatic cleaning device for eliminating the alkaline fog of an electrolytic cleaning tank according to claim 1, characterized in that the liquid level transmitter (9) is connected with a first PID controller (16), the first PID controller (16) is connected with a first PLC controller (17), and the first PLC controller (17) is connected with a second solenoid valve (15).

3. The automatic cleaning device for eliminating the alkali fog of an electrolytic cleaning tank according to any one of claims 1 or 2, characterized in that a second PID controller (18) is connected to the concentration analyzer (11), the second PID controller (18) is connected to a second PLC controller (19), and the second PLC controller (19) is connected to the first solenoid valve (14).

4. The automatic cleaning device for eliminating the alkali mist of an electrolytic cleaning tank according to any one of claims 1 or 2, wherein an exhaust funnel (20) is provided at the top of the alkali mist cleaning tank (2).