CN2747229Y

CN2747229Y - Electrolytic aluminium smoke purification and raw material feeding apparatus

Info

Publication number: CN2747229Y
Application number: CN 200420150689
Authority: CN
Inventors: 刘志玲
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2004-11-03
Filing date: 2004-11-03
Publication date: 2005-12-21
Anticipated expiration: 2014-11-03

Abstract

The utility model discloses an electrolytic aluminium smoke purification and material feeding apparatus, comprising a shell body, a feed port, and 3-6 discharge ports. A high pressure air pipe is connected at the bottom of the shell body. A pneumatic conveying plate which is closely covered with a plurality of ventilating small holes is fixed on the upper side of the high pressure air pipe. A raise sieve is arranged on the upper sides of the discharge ports. An adjusting plate is arranged between the pneumatic conveying plate and the raise sieve. A by-pass pipe is fixed on one side of the discharge ports. A valve plate is arranged in the by-pass pipe, and a proximity transducer is installed on the outer wall of the by-pass pipe. A fast opening door is arranged on the top of the shell body, and checking holes are arranged on the side surfaces of the shell body. The utility model has the advantages that the electrolytic aluminium smoke purification and material feeding apparatus not only can completely obstruct air current to prevent a metering device from inexactly measuring due to the influence of negative voltage, but also can carry out uniform distribution for the alumina containing fluorine, and the electrolytic aluminium smoke purification and material feeding apparatus can timely clean the impurity filtered down to ensure the continuous running of a system, which makes the safety and the reliability of the system obtain considerable enhancement, etc.

Description

Electrolytic aluminum smoke purifies feeding device

Technical field:

The utility model relates to a kind of electrolytic aluminum smoke and purifies feeding device.

Background technology:

Prebaked cell for aluminum-reduction can produce (fluorochemicals 16～25Kg/t.Al) such as nuisance fluorochemical in process of production, it is a production technique more serious to topsoil, be the nuisance in the flue, control fluorochemical quantity discharged, thereby reach state environmental emissioning standard, minimizing is to the pollution of surrounding environment, aluminium cell flue gas dry cleaning process using raw materials for production aluminum oxide is as sorbent material, nuisance gases such as hydrogen fluoride in the absorption flue gas, aluminum oxide after the absorption turns back in the production technique, directly reclaims fluorine.This is a kind of purification process of comprehensive utilization.In the prior art, after the electrolyzer smoking gas containing fluorine is collected from potroom smoke evacuation pipe network, before the flue gas house steward enters the pocket type purification strainer, add among the smoke evacuation house steward quantitatively fresh aluminum oxide, cyclic oxidation aluminium respectively, in the abundant contact process of gas-solid two-phase, the oxidized aluminium absorption of hydrogen fluoride, the aluminum oxide of adding and the dust of taking out of with flue gas from electrolyzer are all separated following in the pocket type purification strainer, and flue gas after being purified is sent into the chimney emptying through smoke exhaust fan.Because the degree of mixing of fresh aluminum oxide and fluoro-containing alumina and flue gas is the important factor that influences hydrogen fluoride gas adsorption cleaning efficient, and be fresh aluminum oxide to be added by reactor obtain higher mixedness in the flue gas in the prior art, and fluoro-containing alumina is directly to add in the horizontal flue collector before the sack cleaner by chute, owing in fluoro-containing alumina, there is impurity, conveying to aluminum oxide is unfavorable, just must before fluoro-containing alumina adds flue collector, the contaminant filter in the aluminum oxide be fallen, if but the impurity that filters is too much, and have little time to clear up, will interrupt because of obstruction causes the defeated material of system; Because flue gas purification system is negative pressure system, the measuring apparatus of feeding device front is inaccurate because of influenced by negative pressure to measure; In addition, flow velocity higher (18～20m/s) in the flue, according to the production capacity of present domestic electrolysis of aluminum supporting flue gas purification system, the caliber of flue collector is greatly between φ 2500mm～φ 3500mm, fluoro-containing alumina directly adds by chute, just be difficult for evenly with mixing of flue gas, not only hydrofluoric purification efficiency is adsorbed in influence, the cloth inequality also influences the dust-collecting efficiency of sack cleaner, therefore, in order to improve the purification efficiency of aluminium electrolytic flue dry cleaning, in the time of just must solving fluoro-containing alumina adding flue collector, can airflow partition, problem that again can the uniformly distributing aluminum oxide.

Summary of the invention:

The purpose of this utility model is: provide a kind of airflow partition fully inaccurate because of influenced by negative pressure to measure to prevent measuring apparatus, fluoro-containing alumina can be carried out uniformly distributing again, and can in time clear up the impurity that filters, to guarantee the continuous operation of system, make the safety of system, the aluminium electrolytic flue dry cleaning feeding device that reliability is greatly enhanced, to overcome the deficiencies in the prior art.

The utility model is to constitute like this: it comprises housing (1), the discharge port (3) that is fixed on the opening for feed (2) of housing (1) one side and is fixed on housing (1) bottom, a side is connected with high-pressure air hose (4) in the bottom of housing (1), upper fixed at high-pressure air hose (4) has air conveying plate (5), be provided with in the top of discharge port (3) and carry sieve (6), at air conveying plate (5) with carry and be provided with adjustable plate (7) between the sieve (6), be fixed with bypass pipe (8) in a side of discharge port (3); In bypass pipe (8), be provided with valve plate (9), proximity transducer (10) is housed on the outer wall of bypass pipe (8); Be provided with quick operating valve (11) at the top of housing (1); Be provided with inspection window (12) in the side of housing (1); Be densely covered with some ventilative apertures on the air conveying plate (5), the aperture of ventilative aperture is less than the particle diameter of transported raw material; The upper edge height of adjustable plate (7) is higher than the upper edge height of opening for feed (2), and its adjustable height; Bypass pipe (8) is not more than 45 ° with the angle β of vertical direction; Discharge port (3) is 3～6.

The utility model compared with prior art, it stops material with adjustable plate, and can control the seal degree of material by regulating the height of adjustable plate, the measuring apparatus that can prevent the feeding device front like this is inaccurate because of influenced by negative pressure to measure; Fluoro-containing alumina is by in the opening for feed input housing, and have the air of pressure to enter housing by high-pressure air hose, make the intravital fluoro-containing alumina of shell be boiling state, by fluoro-containing alumina raw material in the shake housing, make fluoro-containing alumina raw material while level on sustained height cover the upper edge of adjustable plate, also can join in the next stage filling tube thereby fluoro-containing alumina can be assigned in 3～6 discharge ports equably; In the utility model, carry sieve and can filter impurity in the fluoro-containing alumina, when impurity is being carried passing through barrier oxidation aluminium when running up to a certain degree on the sieve, aluminum oxide is piled up carrying on the sieve, when the height of aluminum oxide accumulation reaches the open height of bypass pipe, aluminum oxide will pass through from bypass pipe, in bypass pipe, promote valve plate and the action of interlock rod member thereof, make proximity transducer produce induced signal and deliver to the watch-keeping cubicle and report to the police, the staff can will carry the contaminant removal on the sieve rapidly from quick operating valve, thereby the impurity that cleaning is in time filtered to guarantee the continuous operation of system, makes the safety of system, reliability is improved.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a vertical view of the present utility model;

Fig. 3 is a left-hand view of the present utility model.

Embodiment:

Embodiment of the present utility model: fix an opening for feed (2) in the lower-left side of housing (1), fluoro-containing alumina from aluminum oxide storage bunker is connected with opening for feed (2) by air-driven chute, bottom at housing (1) connects a high-pressure air hose (4), air conveying plate of upper fixed (5) at high-pressure air hose (4), air conveying plate (5) can adopt the sheet metal or the plastic plate that are densely covered with ventilative aperture to make, also can adopt 3～6 layers canvas material to make, but the aperture of ventilative aperture must be less than the particle diameter of transported raw material, bottom, right side at housing (1) is provided with three discharge ports (3), establish one in the top of discharge port (3) and carry sieve (6), at air conveying plate (5) with carry and establish an adjustable plate (7) between the sieve (6), the upper edge height of adjustable plate (7) will be higher than the upper edge height of opening for feed (2), and it highly is adjustable, establish a bypass pipe (8) at the upper right face of discharge port (3), it communicates with the upper space of carrying sieve (6), in bypass pipe (8), establish a valve plate (9), on the outer wall of bypass pipe (8), adorn a proximity transducer (10), bypass pipe (8) is 45 degree with the angle β of vertical direction, establish two quick operating valves (11) of being convenient to quick opening and closing at last at the top of housing (1), and establish two inspection windows at the left and right sides face of housing (1) and (12).

Claims

1. an electrolytic aluminum smoke purifies feeding device, the discharge port (3) that it comprises housing (1) and is fixed on the opening for feed (2) of housing (1) one side and is fixed on housing (1) bottom, it is characterized in that: a side is connected with high-pressure air hose (4) in the bottom of housing (1), upper fixed at high-pressure air hose (4) has air conveying plate (5), be provided with in the top of discharge port (3) and carry sieve (6), at air conveying plate (5) with carry and be provided with adjustable plate (7) between the sieve (6), be fixed with bypass pipe (8) in a side of discharge port (3).

2. electrolytic aluminum smoke according to claim 1 purifies feeding device, it is characterized in that: be provided with valve plate (9) in bypass pipe (8), proximity transducer (10) is housed on the outer wall of bypass pipe (8).

3. electrolytic aluminum smoke according to claim 1 purifies feeding device, it is characterized in that: be provided with quick operating valve (11) at the top of housing (1).

4. electrolytic aluminum smoke according to claim 1 purifies feeding device, it is characterized in that: be provided with inspection window (12) in the side of housing (1).

5. electrolytic aluminum smoke according to claim 1 purifies feeding device, it is characterized in that: be densely covered with some ventilative apertures on the air conveying plate (5), the aperture of ventilative aperture is less than the particle diameter of transported raw material.

6. electrolytic aluminum smoke according to claim 1 purifies feeding device, and it is characterized in that: the upper edge height of adjustable plate (7) is higher than the upper edge height of opening for feed (2), and its adjustable height.

7. electrolytic aluminum smoke according to claim 1 purifies feeding device, it is characterized in that: bypass pipe (8) is not more than 45 ° with the angle β of vertical direction.

8. electrolytic aluminum smoke according to claim 1 purifies feeding device, and it is characterized in that: discharge port (3) is 3～6.