CN2303853Y

CN2303853Y - Gas cleaning and recovering apparatus

Info

Publication number: CN2303853Y
Application number: CN 97233893
Authority: CN
Inventors: 李德生; 关毅; 苏久明; 邹红; 田玉梅
Original assignee: BEIFANG PURIFICATION TECHNOLOG
Current assignee: BEIFANG PURIFICATION TECHNOLOG
Priority date: 1997-07-31
Filing date: 1997-07-31
Publication date: 1999-01-13
Anticipated expiration: 2007-07-31

Abstract

The utility model relates to an improvement for an aluminium electrolysis apparatus for purifying flue gas, which is especially suitable for purifying and recovering the flue gas of a Soderberg slot. The utility model comprises a feeding super-thickness phase flow channel which is respectively connected with a storage bin, an electrolyzer feeder pipe, a blower and a wind pipe. The utility model has the essential structure that the storage bin is connected with an electric dust removing device through a lifter, recycled material super-thickness phase flow channel; the electric dust removing device is respectively connected with a draught fan, and an inlet pipe connected with the feeder pipe of the feeding super-thickness phase flow channel. The utility model has the advantages of good dust removing effect, simple structure, application, low running energy consumption, etc.

Description

The gas cleaning retrieving arrangement

The utility model relates to the improvement of aluminum electrolysis flue gas purification device, and it more is applicable to the gas cleaning recovery of soberberg anode groove.

The purifying method of aluminium electrolytic flue mainly is two kinds of wet method, dry method at present.

Wet purification technology (being divided into alkaline process and acid system again) promptly adopts the method for gas cleaning reclaiming sodium fluoroaluminate, be the 60-70 age begin to adopt than the primary technology, be applicable to the gas cleaning that volume is big, fluoro-containing concentration is low.The main drawback of this technology is the technical process complexity, and investment is big, production cost is high, and has secondary pollution, and general aluminium manufacturer seldom adopts.

The dry cleaning technology is to utilize the needed aluminum fluoride raw material of electrolysis production to absorb hydrogen fluoride, to adsorb hydrofluoric aluminum oxide again, turning back to electrolyzer uses, this method had both been utilized fluorochemical, non-secondary pollution again, be applicable to the gas cleaning that fluoro-containing concentration is higher, that therefore uses is more, but the main drawback of this technology is on the gas-solid separation equipment.For example, sack cleaner, one-time investment is bigger, and because the content of cell with self baking anode flue gas medium pitch tar is higher, very easily sticking stifled cloth bag causes the whole cloth bag and the whole purification system resistance of motion to increase, purification efficiency reduces, in addition, cloth bag is changed frequent, the running cost and the corresponding increase that all has of consuming energy.

The purpose of this practical firewood type is exactly at the problems referred to above, and a kind of fine dust removing effects that has is provided, suitable gas cleaning retrieving arrangement simple in structure.

The purpose of this utility model is achieved in that the utility model comprises the super concentrated phase chute of feed, the airduct of the same respectively feed bin of the super concentrated phase chute of feed, electrolyzer supply pipe, blower fan links to each other, its structural feature is that feed bin passes through lift, the super concentrated phase stream of returning charge is poor, continuous with electric precipitator, the same respectively exit duct of electric precipitator, continuous with the continuous input tube of the supply pipe of the super concentrated phase chute of feed.

Major advantage of the present utility model:

1, good dedusting effect:

The utility model has adopted electric precipitator, especially has deashing device in the electric precipitator, will thoroughly remove attached to the soot dust granule on the body surface at any time, has guaranteed the characteristics that purification efficiency is high;

2, simple in structure being suitable for:

The utility model constructional feature is that feed bin passes through lift, the super concentrated phase chute of returning charge links to each other with electric precipitator, the same respectively exit duct of electric precipitator, continuous with the continuous input tube of the supply pipe of the super concentrated phase chute of feed, and these structural feature of forming this device simple, be easy to make, simply many more than the concentrated treatment facilities in the tradition, what be suitable for is many;

3, the running power consumption is low:

The utility model is to adopt adapted one cover refining plant on the electrolyzer, and promptly modular purification style has been avoided traditional concentrated purification and strengthened fan capacity because of pipeline is long, and in addition, the resistance of electric precipitation is little, so the running of this device is consumed energy low.

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

Fig. 2 is the structural representation of electric precipitator;

Fig. 3 is the structural representation of tar-removing device.

Below in conjunction with accompanying drawing concrete structure of the present utility model is described further:

The utility model comprises the super concentrated phase chute 14 of feed, the super concentrated phase chute 14 of feed links to each other with the airduct 7 of feed bin 15, electrolyzer supply pipe 13, blower fan 1 respectively, feed bin 15 links to each other with electric precipitator 6 by lift 3, the super concentrated phase chute 2 of returning charge, and electric precipitator 6 is respectively with induced draft fan 8, continuous with the continuous input tubes 9 of the supply pipe 11 of the super concentrated phase chute 14 of feed.

It is 94225384.1 structure setting that the super concentrated phase chute 14 of feed, the super concentrated phase chute 2 of returning charge all can adopt the patent No..

It is 97204851.0 structure setting that electric precipitator 6 can adopt number of patent application.

Electric precipitator 6 comprises body 17, body 17 inboards are provided with track 22, the top of the guide rail 20 in the track 22 is a rope 21, is provided with between the guide rail 20 and can be respectively arranged with air outlet 23, blast inlet 18, depositing dust mouth 16 on the wall of body 17 with the contacted wiper 19 of the inwall of body 17.

Be further to promote decontamination effect improving, can be provided with the patent No. in the ingress of the input tube 9 of electric precipitator 6 and be 94229497.1 tar fly-ash separator 10.

Tar fly-ash separator 10 comprises body 25, be respectively arranged with blast inlet 29, air outlet 26, depositing dust mouth 24 on the body 25, be provided with the water jet 27 that links to each other with pump 4 below the blast inlet 29, the water inlet pipe 31 of pump 4 is outside equipped with strong magnetic tube 30, high-frequency oscillator 5, and high-frequency oscillator 5 links to each other with the pre-charge device between water jet 27, the blast inlet 29 28.

During use, the flue gas that electrolyzer 12 produces, through tar fly-ash separator 10, after the activated water that utilizes the electric field provide and pump 4 to provide removes tar in the flue gas, enter electric precipitator 6, carry out gas solid separation through input tube 9 (objectionable impurities such as hydrogen fluoride is adsorbed on the aluminum oxide in input tube 9), through separating cleaned air, enter atmosphere by induced draft fan 8, the solid of separating is delivered to lift 3 through the super concentrated phase chute 2 of returning charge, deliver to feed bin 15 through lift 3, deliver to electrolyzer 12 through the super concentrated phase chute 14 of feed, supply pipe 13 again, promptly provide alumina producing to use.

Claims

1, the gas cleaning retrieving arrangement comprises the super concentrated phase chute of feed (14), the airduct (7) of the same respectively feed bin of the super concentrated phase chute of feed (14) (15), electrolyzer supply pipe (13), blower fan (1) links to each other, feed bin (15) links to each other by lift (3), the same electric precipitator of the super concentrated phase chute of returning charge (2) (6), the same respectively induced draft fan of electric precipitator (6) (8), continuous with the continuous input tube (9) of the supply pipe (11) of the super concentrated phase chute of feed (14).

2, gas cleaning retrieving arrangement according to claim 1, it is characterized in that electric precipitator (6) comprises body (17), be provided with track (22) in the body (17), the top of the guide rail (20) in the track (22) is rope (21), be provided with between the guide rail (20) can same body (17) the contacted wiper of inwall (19); Be respectively arranged with air outlet 23, blast inlet (18), depositing dust mouth (16) on body (17) wall.

3, gas cleaning retrieving arrangement according to claim 2, it is characterized in that tar fly-ash separator device (10) comprises body (25), be respectively arranged with blast inlet (29), air outlet (26), depositing dust mouth (24) on the body (25), be provided with the water jet (27) that same pump (4) links to each other below the blast inlet (29), the water inlet pipe (31) of pump (4) is outside equipped with strong magnetic tube (30), high-frequency oscillator (5), and the pre-charge device (28) between the same water jet of high-frequency oscillator (5) (27), the blast inlet (29) links to each other.