CN212895017U - Aluminum cell flue gas full-flow intelligent control and efficient purification system - Google Patents
Aluminum cell flue gas full-flow intelligent control and efficient purification system Download PDFInfo
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- CN212895017U CN212895017U CN202021526761.8U CN202021526761U CN212895017U CN 212895017 U CN212895017 U CN 212895017U CN 202021526761 U CN202021526761 U CN 202021526761U CN 212895017 U CN212895017 U CN 212895017U
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Abstract
The utility model provides an aluminium cell flue gas full flow intelligence management and control and high-efficient clean system, this method establishes dynamic antithetical couplet accuse mechanism with aluminium electroloysis flue gas clean system and electrolysis technology, realize the electrolysis trough through improve equipment and improve automatic detection means and discharge fume balanced, reduce unorganized emission, the multi-parameter intelligent analysis through the flue gas adjusts clean system's adsorbent alumina's the volume of feeding and the volume of discharging fume, and further improve purification efficiency through the balanced distribution technique with flue gas and adsorbent alumina at clean system purification unit, finally realize that clean system is intelligent, high efficiency, energy-conserving operation. Belongs to the technical field of flue gas purification.
Description
Technical Field
The utility model particularly relates to an aluminium cell flue gas full flow intelligence management and control and high-efficient clean system belongs to the flue gas purification field.
Background
The electrolytic aluminum industrial production adopts a 'cryolite-alumina' fused salt electrolytic method, the fused cryolite is used as a solvent and alumina is used as a solute in the electrolytic production process, a prebaked carbon block is used as an anode, aluminum liquid is used as a cathode, and under the action of strong current, the two poles in an electrolytic cell carry out electrochemical reaction, and the reaction equation is as follows:
At present, aluminum oxide, which is a raw material for aluminum electrolysis production, is used as an adsorbent to purify fluoride in the flue gas, and the fluorine-containing aluminum oxide after adsorption and purification is returned to the process for production. One set of aluminium oxide defluorination clean system undertakes the flue gas collection and the flue gas purification of a plurality of aluminium cell in a production work area, because the cell that clean system undertakes is in large quantity, and electrolysis production needs regular fluting to change the positive pole, this causes the clean system to discharge fume the pipe network and unbalance easily, there is the residual anode in addition and carries and the operation in the cooling process is not standard, change the positive pole, the operation of the unbalance of pipe network of discharging fume and residual anode treatment process is not standard has just brought a large amount of electrolysis flue gas unorganized emissions, caused a large amount of electrolysis flue gas to dissipate to the electrolysis workshop in, the unorganized emission of electrolysis flue gas has endangered the physical and mental health and the polluted environment of production front-line staff on the one hand, on the other hand.
For the aluminum electrolysis flue gas defluorination dry purification system, the purification system is adapted to an electrolysis bath with continuously upgraded large current specification, the configured total flue gas treatment capacity is larger and larger, but the problems of unbalanced smoke discharge, unorganized emission, lack of monitoring means in the process flow, over dependence on manual experience and the like exist, so that the actual operation and the flue gas collection of the purification system are two independent parts, the purification system is only responsible for purifying the flue gas pumped into the purification system, and no feedback exists on how to the purification system can collect the flue gas generated by the electrolysis bath and how to the gas collection efficiency. In addition, each set of flue gas defluorination dry purification system consists of more than ten purification units, and how to evenly distribute the flue gas entering the purification system according to the actual production is also an urgent problem to be solved. In addition, the purification efficiency of the flue gas defluorination dry purification system depends heavily on the addition of fresh alumina and circulating alumina as adsorbents, the feeding amount of circulating alumina at the present stage also depends heavily on experience, the feeding amount of circulating alumina is small, the purification efficiency is low, the feeding amount is large, the damage of alumina is serious, the abrasion of equipment is increased, the energy consumption is wasted, the dynamic adjustment cannot be carried out according to the characteristics of flue gas, and the problems that the distribution of more than ten purification units is not uniform exist. The problems of poor production post environment, overhigh consumption of fluoride salt per ton of aluminum, unstable purification efficiency, large labor cost investment, high energy consumption and the like are brought about
The utility model is produced in view of the problems, increasingly strict environmental protection requirements and intelligent development requirements of aluminum industry existing in the current aluminum cell flue gas purification process.
Disclosure of Invention
An object of the utility model is to provide an aluminium cell flue gas full flow intelligence management and control and high-efficient clean system and system to solve present aluminium cell production flue gas collection inefficiency, discharge fume easy unbalance, unorganized emission is serious, the clean system flue gas and adsorbent purify between the unit distribute inhomogeneous, clean system can not be according to actual automatic adjustment of technology production, intelligent control disappearance, clean system and production disjointed class problem.
In order to solve the problems, the aluminum electrolysis cell flue gas full-flow intelligent control and high-efficiency purification system is supposed to be adopted, the flue gas generated in aluminum electrolysis production is intelligently controlled from the source to the whole discharge process, the aluminum electrolysis cell is changed into an upper gas collection mode, the opening at the upper end is sealed through a cell cover plate, a slotting detection device 2 is installed on the cell cover plate to realize the high-efficiency gas collection of the flue gas and the alarm of the opening of the cell, a smoke exhaust branch pipe electric hole plate regulating valve 5 is arranged on a smoke exhaust branch pipe of the electrolysis cell to replace the existing butterfly valve to realize the smoke exhaust balance of a smoke exhaust pipe network, the smoke exhaust amount of the purification system is increased by detecting aluminum and replacing an anode detection signal, a smoke exhaust branch pipe electric regulating valve and a temperature and pressure detection device are arranged on a residual electrode cooling box to dynamically regulate the smoke exhaust amount and the cooling.
In the system, a fluoride concentration detection unit is arranged at an inlet and an outlet of the purification system so as to adjust the feeding amount of adsorbent alumina of the purification system according to fluoride concentration detection data;
in the system, a pressure detection unit, a purification unit ash removal system and a purification unit inlet electric regulating valve are arranged at an inlet of a purification system, and ash removal frequency and flue gas inlet amount are controlled according to a pressure detection signal of each purification unit inlet flue, so that the uniform distribution of the flue gas amount of each purification unit is realized;
in the system, the charging end of the purification system is provided with the charging branch pipe electric regulating valve and the charging amount detection unit, and the purification system can uniformly distribute fresh alumina and circulating alumina serving as adsorbents to the reactor of each purification unit through the accurate metering charging amount of the charging amount detection unit.
Compared with the prior art, the utility model discloses a gas collection efficiency that can heighten the flue gas practically and the unorganized emission that reduces the flue gas to the intelligent management and control of aluminium cell flue gas full flow, reduced the loss of pollutant in the workshop on the one hand, harm an ray of production staff's physical and mental health, on the other hand reduces the inorganized fluoride consumption that discharges and can reduce ton aluminium effectively, reduction in production cost. In addition, the purification system automatically adjusts the operation parameters of the purification system, such as the smoke discharge amount, the adsorbent feeding amount, the distribution of the smoke and the like according to the parameter fluctuation of the process production smoke, so that the purification efficiency is improved, the stable operation is realized, the operation energy consumption is reduced, and the damage of aluminum oxide and the abrasion of equipment are reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention;
the labels in the figures are: 1-aluminum electrolysis cell, 2-slotting detection device, 3-electrolysis cell smoke exhaust branch pipe, 4-first pressure and temperature detection device, 5-smoke exhaust branch pipe electric hole plate regulating valve, 6-row cigarette main pipe, 7-smoke exhaust branch pipe temperature, pressure and fluoride detection device, 8-smoke exhaust branch pipe electric regulating valve, 9-anode scrap cooling box, 10-anode scrap cooling box smoke exhaust branch pipe, 11-smoke exhaust branch pipe electric regulating valve, 12-second temperature and pressure detection device, 13-anode scrap cooling smoke exhaust main pipe, 14-electrolysis workshop skylight, 15-skylight pollutant online inspection device, 16-smoke exhaust main pipe, 17-purification system inlet temperature, pressure, particulate matter and fluoride detection device, 18 purification dust remover (multi-purification unit), 19-a purification unit ash removal system, 20-a purification unit inlet electric regulating valve, 21-a purification unit reactor, 22-a purification unit inlet flue, 23-a purification unit pressure detection device, 24-a purification system outlet flue pipe, 25-a purification system outlet temperature, pressure, particulate matter and fluoride detection device, 26-a purification system smoke exhaust fan electric regulating valve, 27-a smoke exhaust fan, 28-a chimney, 29-a fresh alumina bin, 30-a fresh alumina distribution system, 31-a purification unit fresh alumina feeding branch pipe, 32-a feeding branch pipe electric regulating valve, 33-a feeding amount detection unit, 34-a fluorine-carrying alumina conveying device (such as a belt conveying device), 35-a fluorine-carrying alumina return bin conveying device (such as a belt conveying device), 36-circulating alumina electric regulating valve, 37-circulating alumina distribution system, 38-purifying unit circulating alumina feeding branch pipe, 39-circulating alumina feeding branch pipe electric regulating valve, 40-feeding amount detecting unit and 41-fluorine-carrying alumina bin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.
Examples
As shown in figure 1, the purification system of the utility model undertakes a large number of aluminum electrolysis cells 1, every set of purification system of the current large-scale aluminum electrolysis cell is responsible for the smoke discharge of hundreds of electrolysis cells, the number of the smoke discharge branch pipes 6 is 6-10, the number of the anode scrap cooling boxes 9 is dozens, and the purification system needs to balance the smoke discharge of all the equipment responsible for the purification system. The biggest difficulty of clean system is just solving the balanced problem of the pipe network of discharging fume and guaranteeing the gas collection problem, the utility model discloses a following means is implemented: the aluminum cell comprises an aluminum cell 1, a slotting detection device 2 is arranged on the aluminum cell 1 and used for detecting whether an electrolytic cell cover is opened or closed in place, the electrolytic cell cover is closed when the electrolytic cell is normally produced, a purification system is provided with a smoke exhaust branch pipe electric hole plate regulating valve 5 through an electrolytic cell smoke exhaust branch pipe 3, the drift diameter of the smoke exhaust branch pipe electric hole plate regulating valve 5 is determined through accurate calculation, the smoke exhaust balance of a smoke exhaust pipe network is fundamentally ensured, a first pressure and temperature detection device 4 is arranged on the electrolytic cell smoke exhaust branch pipe 3 and used for detecting the smoke exhaust negative pressure and temperature of a single electrolytic cell, the aperture of the smoke exhaust branch pipe electric hole plate regulating valve 5 is finely adjusted to realize the smoke exhaust balance when the electrolytic cell is slotted (the anode is replaced and aluminum is discharged), and the situation that the heat dissipation of the electrolytic cell is too large due to the overlarge.
The cigarette discharging main pipe 6 is provided with a smoke discharging branch pipe temperature, pressure and fluoride detection device 7 (comprising a temperature sensor, a pressure sensor and a fluoride detection sensor) and a smoke discharging branch pipe electric regulating valve 8, and the smoke discharging branch pipe electric regulating valve 8 has the functions of regulating the smoke discharging branch pipe electric regulating valve 8 through the smoke discharging branch pipe temperature, pressure and parameters detected by the fluoride detection device 7 when the smoke discharging amount is increased when one smoke discharging branch pipe is opened, so as to balance the smoke discharging amount of other cigarette discharging branch pipes, and regulating the smoke discharging amount of a smoke discharging fan 27 and the material distribution amount of a circulating alumina material distribution system 37 according to the detected temperature and fluoride concentration conditions.
The second temperature and pressure detection device 12 and the smoke exhaust branch pipe electric regulating valve 11 are installed on the anode scrap cooling box smoke exhaust branch pipe 10 of the anode scrap cooling box 9 and used for realizing disabled cooling intelligent smoke exhaust, when an anode scrap is placed into the anode scrap cooling box, the smoke exhaust branch pipe electric regulating valve 11 is automatically opened (normally closed when not in operation), the opening degree of the smoke exhaust branch pipe electric regulating valve 11 is adjusted according to the temperature and pressure data detected by the second temperature and pressure detection device 12 to realize dynamic adjustment of smoke exhaust amount, when the temperature of the anode scrap is high, the smoke exhaust amount is small when the temperature is low, when the temperature is cooled to a certain temperature, the smoke exhaust branch pipe electric regulating valve 11 is automatically closed, the cooling effect is met, and meanwhile energy consumption is saved.
A skylight pollutant online inspection device 15 is arranged on a skylight 14 of an electrolytic plant and used for detecting the unorganized emission condition in the plant, one set is arranged in each work area, the skylight pollutant online inspection device 15 detects that the emission concentration of pollutants exceeds a limit value and comprehensively judges the production state through a signal of a slotting detection device 2 on the upper portion of an electrolytic cell, the smoke discharge amount is adjusted through a smoke discharge main pipe electric adjusting valve 8 on a smoke discharge main pipe 6, the smoke discharge amount of a smoke discharge fan 27 is adjusted, whether the smoke discharge amount is reasonable or not is judged through temperature detection data on a smoke discharge branch pipe 3 and the smoke discharge main pipe 6 of the electrolytic cell, and finally the unorganized emission of the plant is controlled.
The inlet and outlet of the purification dust remover 18 are provided with purification system inlet temperature, pressure, particulate matter, fluoride detection device 17 and purification system outlet temperature, pressure, particulate matter and fluoride detection device 25, the purification system comprehensively adjusts the feeding amount of the circulating alumina material distribution system 37 according to the data conditions detected by 17, 25 and 15 and the smoke discharge condition of the smoke discharge fan 27 after analysis and judgment, so that the added circulating alumina can adapt to the smoke condition, the purification requirement is met, the circulation times are reduced, and the alumina damage rate and the equipment abrasion are reduced.
The purification efficiency of the purification dust remover 18 is influenced by the feeding amount of the adsorbent alumina and the distribution condition between the adsorbent and the flue gas unit, in order to improve the purification efficiency, firstly, the distribution balance of the flue gas in the purification units needs to be realized, a purification unit inlet electric regulating valve 20 and a purification unit pressure detection device 23 are arranged on each purification unit inlet flue 22 of the purification dust remover 18, the purification system adjusts the opening degree of the purification unit inlet electric regulating valve 20 according to the data of the purification unit pressure detection device 23 so as to ensure the resistance balance of the purification units, meanwhile, a purification unit ash cleaning system 19 arranged on the purification dust remover 18 is used for controlling the filter bag resistance balance of each purification unit, and finally, the quantity balance of the flue gas entering each purification unit is realized. The feeding amount of the fresh alumina distribution system 30 is not adjustable, the numerical value is determined by production, the fresh alumina has very good adsorption performance, the fresh alumina is uniformly distributed into each purification unit reactor 21 to ensure the purification efficiency, the purification unit fresh alumina feeding branch pipe 31 is provided with a feeding branch pipe electric regulating valve 32 and a feeding amount detection unit 33, and the feeding amount signal detected by the feeding amount detection unit 33 adjusts the opening degree of the feeding branch pipe electric regulating valve 32 to realize the fresh alumina feeding balance of each purification unit. The feeding amount of the circulating alumina is adjusted according to the concentration of fluoride in flue gas and the amount of the flue gas, a circulating alumina electric regulating valve 36 on a circulating alumina distribution system 37 is used for controlling the amount of the circulating alumina entering a purification system and an alumina fluoride carrying bin 41, a circulating alumina feeding branch pipe electric regulating valve 39 and a feeding amount detection unit 40 are arranged on a purification unit circulating alumina feeding branch pipe 38, and the fresh alumina feeding balance of each purification unit is realized by adjusting the opening degree of the circulating alumina feeding branch pipe electric regulating valve 39 through a feeding amount signal detected by the feeding amount detection unit 40.
The electric regulating valve 26 of the exhaust fan of the purification system is used for assisting in regulating the exhaust amount of the purification system, and the main regulation is the regulation through the rotating speed (variable frequency fan) of the exhaust fan 27 or the angle (fixed blade adjustable fan) of a guide blade.
The utility model discloses an above-mentioned technical route can improve aluminium cell's collection cigarette and reduce the unorganized emission, and clean system has reduced ton aluminum fluoride's consumption and the energy consumption of practicing thrift clean system when satisfying the purification index according to the actual conditions dynamic adjustment clean system that production was discharged fume simultaneously, in addition, the utility model discloses still can reduce work end-to-end person effectively, improve the trade and equip the level.
The above description is only for the purpose of illustrating particular embodiments of the present invention, and is not intended to limit the scope of the present invention. Without departing from the concept of the present invention, a number of simple deductions or replacements can be made, all of which should be considered as belonging to the spirit and scope of the technical solution of the present invention.
Claims (4)
1. Aluminium cell flue gas full flow intelligence management and control and high-efficient clean system, its characterized in that: the system changes an aluminum electrolytic cell into upper gas collection and seals an upper opening through a cell cover plate, a slotting detection device (2) is installed on the cell cover plate, a smoke exhaust branch pipe electric hole plate adjusting valve (5) is arranged on a smoke exhaust branch pipe (3) of the electrolytic cell to replace an existing butterfly valve to realize smoke exhaust balance of a smoke exhaust pipe network, aluminum is detected and an anode detection signal is replaced to increase smoke exhaust amount of a purification system, a smoke exhaust branch pipe electric adjusting valve (11) and a temperature and pressure detection device (12) are arranged on an anode scrap cooling box (9) to dynamically adjust the smoke exhaust amount and cooling time of the anode scrap cooling box (9), and a skylight pollutant online inspection device (15) is installed on a skylight (14) of an electrolytic workshop to adjust the smoke exhaust amount of the.
2. The aluminum electrolysis cell flue gas full-flow intelligent control and efficient purification system according to claim 1, characterized in that: and fluoride concentration detection units are arranged at the inlet and the outlet of the purification system so as to adjust the feeding amount of the adsorbent alumina of the purification system according to fluoride concentration detection data.
3. The aluminum electrolysis cell flue gas full-flow intelligent control and efficient purification system according to claim 1, characterized in that: the inlet of the purification system is provided with a pressure detection unit, a purification unit ash removal system (19) and a purification unit inlet electric regulating valve (20), and the ash removal frequency and the flue gas inlet amount are controlled according to the pressure detection signal of each purification unit inlet flue, so that the flue gas amount of each purification unit is uniformly distributed.
4. The aluminum electrolysis cell flue gas full-flow intelligent control and efficient purification system according to claim 1, characterized in that: the charging end of the purification system is provided with a charging branch pipe electric regulating valve (32) and a charging amount detection unit (33), and the purification system precisely measures the charging amount through the charging amount detection unit (33) so as to uniformly distribute the adsorbent fresh alumina and the circulating alumina to the reactor of each purification unit.
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| CN202021526761.8U CN212895017U (en) | 2020-07-29 | 2020-07-29 | Aluminum cell flue gas full-flow intelligent control and efficient purification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114836792A (en) * | 2022-05-30 | 2022-08-02 | 贵州创新轻金属工艺装备工程技术研究中心有限公司 | Air pressure control device and method for aluminum cell smoke exhaust pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114836792A (en) * | 2022-05-30 | 2022-08-02 | 贵州创新轻金属工艺装备工程技术研究中心有限公司 | Air pressure control device and method for aluminum cell smoke exhaust pipe |
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