CN202072711U

CN202072711U - Pulverized coal recovery and blowing device of blast furnace

Info

Publication number: CN202072711U
Application number: CN2011201184964U
Authority: CN
Inventors: 王健康; 周集林; 宋强
Original assignee: Lengshuijiang Iron & Steel Co Ltd
Current assignee: Lengshuijiang Iron & Steel Co Ltd
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2011-12-14
Anticipated expiration: 2021-04-21

Abstract

The utility model discloses a pulverized coal recovery and blowing device of a blast furnace; a cover plate is connected onto the top end of a recovery unit; an emptying pipe with a first manual valve is fixedly connected onto the cover plate; a division board is fixedly connected onto an inner cavity wall on the recovery unit; a bag is arranged on the division board towards an inner cavity on the lower end of the recovery unit; a back-blowing pipe with a second manual valve passes through the outer wall of the recovery unit and is arranged in the upper inner cavity of the recovery unit; and a plurality of blowing nozzles are arranged on the back-blowing pipe. A spray pipe with a third manual valve and an inlet pipe with a fourth manual valve are arranged on the wall on one side of the lower inner cavity of the recovery unit, and a sweeping hole is arranged on the wall of the other side of the lower inner cavity of the recovery unit. The bottom end of the recovery unit is connected with a recovery bin, a filter mesh is arranged on the inner wall of the upper end of the recovery bin, and the lower end of the recovery bin is connected with a coal spray pipe with a fifth manual valve. The device has low manufacturing cost, can blow the cleared pulverized coal back to the blast furnace, eliminates the pollution of the pulverized coal to the environment, has significant economic and social benefits, and has popularization and practical value.

Description

Blast-furnace coal powder reclaims blowing device

Technical field

The utility model relates to a kind of blast-furnace coal powder that is applied in the metallurgy high furnace coal injection system and reclaims blowing device, belongs to metallurgical equipment.

Background technology

In order to reduce the ironmaking coke ratio, the coal dust of winding-up proper amt is a current techique in blast furnace in blast furnace ironmaking process; But unavoidably have some quality problems owing to make the raw coal of coal dust, the defective that exists in making coal dust and pulverized coal conveying process causes metallurgy high furnace that regular line clogging takes place in the coal injection process simultaneously, causes coal powder injection not carry out smoothly.Before the utility model, for removing the method for stopping up general employing is with the direct externally discharging of the coal dust of block part, to reach the purpose that empties pulverized coal feed pipe, in addition, ZL200510031987.4 " automatic monitoring clogging of metallurgy high furnace coal fines lance device " is arranged, this device can in time be understood or monitor the stopping state of each pulverized coal gun and take appropriate measures and reaches the purpose of block clearing, but does not reasonably reclaim and utilize for the coal dust of block clearing, as a 500m ³Metallurgy high furnace, need clear up the coal dust of about 2.0t every day, as by 1000 yuan/t, five 500m ³The coal dust in blast furnace every year lose nearly 3,650,000 yuan, and efflux the coal dust serious environment pollution.

Summary of the invention

The purpose of this utility model is to provide a kind of the pigging coal dust is reclaimed the blast-furnace coal powder recovery blowing device of sending into after filtration again in the stove again, reaches to reduce production costs, and effectively solves environmental pollution problems.

For achieving the above object, the technical solution adopted in the utility model is: described a kind of blast-furnace coal powder reclaims blowing device and comprises evacuated tube, cover plate, anti-blowpipe, dividing plate, withdrawer, winding-up pipe, inlet pipe, coal powder injection pipe, recovery bin, filtering net, clean-out opening and cloth bag.Top at withdrawer is connected with cover plate, is fixed with the evacuated tube with first manual valve on the cover plate, is fixed with dividing plate on the upper end internal chamber wall of withdrawer, and the cloth bag that is equipped with on the dividing plate stretches into the lower inner cavity of withdrawer from the lower surface of dividing plate.The outer wall that passes withdrawer with the anti-blowpipe of second manual valve is loaded on the last inner chamber of withdrawer, quantity is housed more than or equal to 1 blow gun on the anti-blowpipe of inner chamber part on the withdrawer.Winding-up pipe with the 3rd manual valve is installed on the wall of lower inner cavity one side of withdrawer, on a sidewall of withdrawer, is equipped with inlet pipe, on another sidewall of withdrawer, have clean-out opening with the 4th manual valve near the winding-up pipe.Bottom in withdrawer is connected with recovery bin, and filtering net is configured in the upper end inwall of recovery bin, and the lower end of recovery bin is connected with the coal powder injection pipe with the 5th manual valve.

A kind of blast-furnace coal powder that adopts as above technical scheme to provide reclaims blowing device compared with prior art, and technique effect is:

1. be a kind of brand-new equipment innovation, be the initiative of the same industry;

2. the annual production cost of saving is about 160 times of covering device cost of manufacture for this reason, improved economic benefit of enterprises;

3. solved problem of environmental pollution, social benefit is obvious.

Description of drawings

Fig. 1 is the cross-sectional schematic that a kind of blast-furnace coal powder described in the utility model reclaims blowing device, also is Figure of abstract of the present utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

As shown in Figure 1, described a kind of blast-furnace coal powder recovery blowing device comprises evacuated tube 1, cover plate 2, anti-blowpipe 3, dividing plate 4, withdrawer 5, winding-up pipe 6, inlet pipe 7, coal powder injection pipe 8, recovery bin 9, filtering net 10, clean-out opening 11 and cloth bag 12.

Make the barrel-shaped withdrawer 5 of a drum shape or side with sheet metal (as stainless steel plate or general steel plate etc.), be connected with cover plate 2 on the top of withdrawer 5, withdrawer 5 can be welding or joint bolt connection with the pattern that is connected of cover plate 2, and the shape of cover plate 2 is identical or similar with the top shape of withdrawer 5.Be fixed with at (best for central point) on the cover plate 2 on the upper end internal chamber wall of evacuated tube 1 with the first manual valve 1A, withdrawer 5 and be fixed with dividing plate 4, the cloth bag 12 that is equipped with on the dividing plate 4 stretches into from the lower surface of dividing plate 4 and reclaims 5 lower inner cavity.The outer wall that passes withdrawer 5 with the anti-blowpipe 3 of the second manual valve 3A is loaded on the last inner chamber of withdrawer 5, quantity is housed more than or equal to 1 blow gun 3B on the anti-blowpipe 3 of inner chamber part on the withdrawer 5.Winding-up pipe 6 with the 3rd manual valve 6A is installed on the wall of lower inner cavity one side of withdrawer 5, stretches into a bottom of the winding-up pipe 6 of withdrawer 5 lower inner cavities towards withdrawer 5.Near winding-up pipe 6 inlet pipes 7 that on a sidewall of withdrawer 5, are equipped with the 4th manual valve 7A, with the inlet pipe 7 symmetrical clean-out opening 11 (or claiming manhole 11) that on another sidewall of withdrawer 5, have, bottom in withdrawer 5 is connected with (cone-shaped) recovery bin 9, this connection can be welding or joint bolt connects, and the bottom shape of withdrawer 5 is identical or similar with the end shape of recovery bin 9.Filtering net 10 is configured in the upper end inwall lower end inwall of withdrawer 5 (or be configured in) of recovery bin 9, is connected with the coal powder injection pipe 8 with the 5th manual valve 8A in the lower end of recovery bin 9.

When coal spraying pipeline stops up, open the 4th manual valve 7A on the inlet pipe 7 earlier, allow the coal dust that is jammed in the coal spraying pipeline enter withdrawer 5 from inlet pipe 7, open the first manual valve 1A on the evacuated tube 1 simultaneously, the coal dust pressurized air after cloth bag 12 filters that enters in the withdrawer 5 enters in the atmosphere through evacuated tube 1, and impure coal dust is fallen on the filtering net 10, and the coal dust after filtering through filter screen 10 enters recovery bin 9, and impurity is stayed on the filtering net 10.Through after a while or after a certain ducted coal dust that is blocked cleared up, close the 4th manual valve 7A and the first manual valve 1A, the 3rd manual valve 8A on the unlatching winding-up pipe 6 on the 3rd manual valve 6A and the coal powder injection pipe 8, to filter through filter screen 10 and fall into the clean coal dust of recovery bin 9 by coal powder injection pipe 8 spirt blast furnaces, again utilize, reduce the ironmaking coke ratio.

When being stained with too much coal dust on the cloth bag 12 and making resistance excessive, open the second manual valve 3A on the anti-blowpipe 3, a plurality of blow gun 3Bs of (compression) air on anti-blowpipe 3 carry out blowback to cloth bag 12, cleaning cloth bag 12.When the impurity on the filtering net 10 is too much, open clean-out opening (manhole) 11, remove the impurity on the filtering net 10, can reach purpose described in the utility model.

Claims

1. a blast-furnace coal powder reclaims blowing device, comprise evacuated tube (1), cover plate (2), anti-blowpipe (3), dividing plate (4), withdrawer (5), winding-up pipe (6), inlet pipe (7), coal powder injection pipe (8), recovery bin (9), filtering net (10), clean-out opening (11) and cloth bag (12), it is characterized in that: be connected with cover plate (2) on the top of withdrawer (5), be fixed with evacuated tube (1) on the cover plate (2) with first manual valve (1A), be fixed with dividing plate (4) on the upper end internal chamber wall of withdrawer (5), the cloth bag (12) that is equipped with on the dividing plate (4) stretches into the lower inner cavity of withdrawer (5) from the lower surface of dividing plate (4); The outer wall that passes withdrawer (5) with the anti-blowpipe (3) of second manual valve (3A) is loaded on the last inner chamber of withdrawer (5), quantity is housed more than or equal to 1 blow gun (3B) on the anti-blowpipe (3) of the last inner chamber part of withdrawer (5); Winding-up pipe (6) with the 3rd manual valve (6A) is installed on the wall of lower inner cavity one side of withdrawer (5), close winding-up pipe (6) is equipped with the inlet pipe (7) with the 4th manual valve (7A) on a sidewall of withdrawer (5), have clean-out opening (11) on another sidewall of withdrawer (5); Be connected with recovery bin (9) in the bottom of withdrawer (5), filtering net (10) is configured in the upper end inwall of recovery bin (9), and the lower end of recovery bin (9) is connected with the coal powder injection pipe (8) with the 5th manual valve (8A).