CN201135884Y

CN201135884Y - Fluid bed reactor

Info

Publication number: CN201135884Y
Application number: CNU2007201848155U
Authority: CN
Inventors: 梁显军; 张洪军; 赖华敏; 白云岭; 康新占; 邢卓; 郭海荣
Original assignee: SHENYANG ORIENT TITANIUM INDUSTRY Co Ltd
Current assignee: SHENYANG ORIENT TITANIUM INDUSTRY Co Ltd
Priority date: 2007-12-17
Filing date: 2007-12-17
Publication date: 2008-10-22
Anticipated expiration: 2017-12-17

Abstract

The utility model relates to a fluidized bed reactor. The utility model adopts the technical proposal that an upper bed layer and a lower bed layer are installed in the casing body of the fluidized bed reactor, the casing body is respectively connected with an upper cone and a lower cone together, a plurality of holes are arranged on the upper bed layer and the lower bed layer, a blast cap is installed on each hole, vent holes are arranged on the blast cap, a gas inlet opening and a drain hole are installed on the lower cone; a material inlet opening and an interlayer material outlet opening are positioned on the upper bed layer, and the interlayer material outlet opening is positioned between the upper bed layer and the lower bed layer; a tail gas outlet opening is positioned at the top of the upper cone, and a product outlet opening is positioned on the lower bed layer; an overflow tube device penetrates through the upper bed layer and the lower bed layer and is fixed on the upper cone and the lower cone, and a manhole and a supporting seat are installed on the casing body. By adopting the fluidized bed reactor, the aluminum hydroxide and the HF gas can continuously and thoroughly react on the upper bed layer and the lower bed layer, thereby the reaction is more sufficient, and the efficiency is higher.

Description

Fluidized-bed reactor

Technical field:

The invention relates to the consersion unit on a kind of aluminum fluoride production line, particularly a kind of consersion unit that is used on the aluminum fluoride by dry process production line.

Background technology:

Aluminum fluoride (AlF ₃) be a kind of main auxiliary material (be mainly used in the flux of aluminium electroloysis, adjust the molecular proportion level of electrolytic tank electrolysis matter) in the Aluminium Electrolysis process, its water content is very big to Aluminum Electrolysis Production and purification process influence.Aluminum fluoride is produced representational technology hydrofluoric acid---wet processing, hydrogen fluoride---dry process.Aluminum fluoride by dry process has main content height, moisture is low, packing ratio is great characteristics, is specially adapted to reduce the electrolyte molecule ratio behind the electrobath start.Compare with the wet method product, aluminum fluoride by dry process in use has following advantage: a, main content more than 90%, exceeds nearly 5 percentage points of wet method product, and impurity content is low, has saved the aluminum fluoride consumption, has reduced production cost, helps improving the primary aluminum quality.B, moisture are low, less than 1.0%, well below the level of wet method product moisture 7.0%, use the aluminum fluoride by dry process product in electrolytic process, and hydrolysis takes place AlF3 hardly, and its available effective ingredient is higher than the wet method product far away.More main is has avoided using the situation of the severe operational environment that the wet method product causes because of the hydrolysis of aluminum fluoride, helps environmental protection.But the structure of reactor complexity of conventional dry aluminum fluoride, investment is big, and reaction is not exclusively, poor continuity, efficient is low, and integrated cost is higher, so develop the developing direction that new aluminum fluoride by dry process reactor becomes the sector.

Summary of the invention:

In order to address the above problem, the invention provides a kind of fluidized-bed reactor, makes aluminium hydroxide and HF gas can carry out on upper and lower bed continuously, react fully, thereby makes reaction more complete, and efficient is higher.The purpose of the invention is achieved through the following technical solutions: fluidized-bed reactor comprises housing (1), interlayer material outlet (2), upper bed layer (3), material inlet (4), overflow pipe device (5), tail gas outlet (6), upper cone (7), manhole (8), blast cap (9), lower cone (10), drain hole (11), gas feed (12), products export (13), lower bed layer (14), interlayer material inlet (15), bearing (16); Install bed (3) and lower bed layer (14) in the housing (1), housing (1) links together with upper cone (7) and lower cone (10) respectively, upper bed layer (3) and lower bed layer (14) are provided with some holes, a blast cap (9) is installed on each hole, passage (17) is set on the blast cap (9), goes up at lower cone (10) gas feed (12) and drain hole (11) are installed; Material inlet (4) and interlayer material outlet (2) are positioned at above the upper bed layer (3), and interlayer material inlet (15) is positioned between upper bed layer (3) and the lower bed layer (14); Tail gas outlet (6) is positioned at upper cone (7) top, and products export (13) is positioned at above the lower bed layer (14); Overflow pipe device (5) passes upper bed layer (3) and lower bed layer (14) is fixed on upper cone (7) and the lower cone (10), and manhole (8) and bearing (16) are installed on the housing (1).

The operation instruction of the invention: the aluminium hydroxide powder through super-dry is sent in the upper bed layer by the material inlet of feed spiral (VFC) above upper bed layer, contacts with the hot HF gas that is entered by gas feed, carries out pre-reaction.The material that pre-reaction generates by the overflow pipe device flow into lower bed layer or by the interlayer material go out, lower bed layer is sent in import (the interlayer material outlet can link to each other with the interlayer material inlet by outside feed spiral); With HF gas contacting once more, continue reaction.The aluminium fluoride product that reaction back generates is discharged by products export and is entered cooling workshop section, and the tail gas that produces discharges absorption system by the outlet of the tail gas on the upper cone, and unreacted aluminium hydroxide powder completely goes the circulatory system by the drain hole of lower cone.For making the aluminium hydroxide powder fully contact, react completely with HF gas, reach fluidized state, many blast caps all have been installed on upper and lower bed.

The beneficial effect of the invention is: because enclosure interior is provided with upper and lower two-layer bed, the aluminium hydroxide powder that can make into so earlier carries out pre-reaction at upper bed layer and HF gas, after reaction is finished, enter lower bed layer, unreacted material completely continues reaction at lower bed layer and HF gas, make reaction more complete, more abundant, thereby improved reaction mass.In order to make material can enter lower bed layer smoothly, be provided with the overflow pipe device in the equipment, by regulating the overflow pipe device, make the material after the pre-reaction enter lower bed layer by overflow pipe, continue reaction.Because the overflow pipe device is installed in the housing, material enters into lower bed layer from upper bed layer with the shortest distance like this, has reduced the thermal loss and the pressure loss.For fully react the good condition of having created at lower bed layer.In order to prevent that the overflow pipe device from breaking down, on equipment, be provided with shunting device, by interlayer material import and export, material is transferred to lower bed layer from upper bed layer.When having avoided the overflow pipe device to break down, must stop and keep in repair, course of reaction is carried out continuously, thereby improved reaction efficiency.When preventing that gas from passing bed, avoid the bed that weares and teares, changed the pore structure of the Φ 3 of bed employing in the past, but on every layer of bed, cap structure is set, the passage of some Φ 3 is set on the blast cap, so promptly can avoid the bed that weares and teares, can make again that HF gas is more uniform to enter material bed on the bed, help reacting completely.In order evenly to enter bed, on inlet tube, opened many holes for bottom HF gas, the gas access arrangement is relatively disperseed.Manhole is the maintenance of equipment for convenience.

Description of drawings:

Fig. 1 is the schematic appearance of fluidized-bed reactor;

Fig. 2 is the fluidized-bed reactor structural representation;

Fig. 3 is the blast cap layout drawing on the upper bed layer;

Fig. 4 is the structural representation of blast cap.

The specific embodiment:

Shown in Fig. 1～4, fluidized-bed reactor: comprise housing 1, interlayer material outlet 2, upper bed layer 3, material inlet 4, overflow pipe device 5, tail gas outlet 6, upper cone 7, manhole 8, blast cap 9, lower cone 10, drain hole 11, gas feed 12, products export 13, lower bed layer 14, interlayer material inlet 15, bearing 16;

Install bed 3 and lower bed layer 14 in the housing 1, housing 1 links together with upper cone 7 and lower cone 10 respectively, upper bed layer 3 and lower bed layer 14 are provided with some holes, a blast cap 9 is installed on each hole, the passage 17 of 6 Φ 3 is set on blast cap 9, gas feed 12 and drain hole 11 are installed on lower cone 10; Material inlet 4 and interlayer material outlet 2 are positioned at above the upper bed layer 3, and interlayer material inlet 15 is between upper bed layer 3 and lower bed layer 14, and interlayer material inlet 15 can link to each other with interlayer material outlet 2 by outside feed spiral; Tail gas outlet 6 is positioned at upper cone 7 tops, and products export 13 is positioned at above the lower bed layer 14; Overflow pipe device 5 passes upper bed layer 3 and lower bed layer 14 is fixed on upper cone 7 and the lower cone 10, and manhole 8 and bearing 16 are installed on the housing 1.

Claims

1, fluidized-bed reactor is characterized in that comprising housing (1), interlayer material outlet (2), upper bed layer (3), material inlet (4), overflow pipe device (5), tail gas outlet (6), upper cone (7), manhole (8), blast cap (9), lower cone (10), drain hole (11), gas feed (12), products export (13), lower bed layer (14), interlayer material inlet (15), bearing (16); Install bed (3) and lower bed layer (14) in the housing (1), housing (1) two ends link together with upper cone (7) and lower cone (10) respectively, upper bed layer (3) and lower bed layer (14) are provided with some holes, a blast cap (9) is installed on each hole, passage (17) is set on the blast cap (9), goes up at lower cone (10) gas feed (12) and drain hole (11) are installed; Material inlet (4) and interlayer material outlet (2) are positioned at above the upper bed layer (3), interlayer material inlet (15) is positioned between upper bed layer (3) and the lower bed layer (14), tail gas outlet (6) is positioned at upper cone (7) top, and products export (13) is positioned at above the lower bed layer (14); Overflow pipe device (5) passes upper bed layer (3) and lower bed layer (14) is fixed on upper cone (7) and the lower cone (10), and manhole (8) and bearing (16) are installed on the housing (1).