CN2341103Y

CN2341103Y - Coal powder sprayer for blast furnace

Info

Publication number: CN2341103Y
Application number: CN 98205299
Authority: CN
Inventors: 李庆国
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-03
Filing date: 1998-06-03
Publication date: 1999-09-29
Anticipated expiration: 2008-06-03

Abstract

The utility model relates to a coal powder sprayer for a blast furnace, which comprises a cloth exhaust bag, a coal collecting cabin, an electronic balance, an upper coal powder valve, an upper coal storage pipe, a lower coal storage pipe, a lower coal powder valve, a mixer, a lower inflating valve, and an upper inflating valve, wherein, the upper coal powder valve is connected with an upper part of the upper coal storage pipe whose lower part is connected with an upper part of the lower coal storage pipe by the lower coal powder valve; a lower part of the lower coal storage pipe is connected with the mixer; the upper coal storage pipe is connected with the lower coal storage pipe by pipelines. The capacity of the upper storage coal pipe and the lower storage coal pipe is devised with no bigger than 0.025 m 3. The utility model has the advantages that high pressure spraying effects are achieved by using a normal pressure spraying device; the spraying effect and safety performance are enhanced; the cost of spraying equipment and technology is lowered; the application range for spraying coal powder is expanded.

Description

A kind of blast-furnace coal injection device

The utility model relates to the auxiliary equipment of blast furnace ironmaking in a kind of field of metallurgy, is the improvement to existing pulverized coal injection into blast furna powder equipment.

Blast furnace blowing fuel is not only ironmaking and is enlarged fuel source in producing, saves one of measure of coke, also is simultaneously that blast furnace uses high wind-warm syndrome, oxygen enriched blast, improves the favourable measure of operational condition.Owing to the reasons such as reasonable utilization of the deposit of fuel and the exploitation energy, in the blast furnace ironmaking production at present generally based on coal injection.Because coal dust is combustible, especially the high bituminous coal of volatile matter easily produces combustion explosion, so the safety of coal injection mainly is to prevent Fire explosion.The blowing method of coal dust has normal pressure winding-up and high pressure blow smelting operation two classes.The normal pressure blowing process is to work under normal pressure because of the storehouse; safe; need not carry out protection of inert gas; so invest little, running cost is low; but the normal pressure blowing device in the winding-up process coal dust to the serious wear of spiral pump, so exist the problem that service life of equipment is short, stopping property is poor, down draught is serious.Thereby because plant issue makes the normal pressure blowing process be difficult to apply.High pressure blow smelting operation is because using high-pressure bottle that coal dust is jetted, and its poor stability will carry out inert gas shielding to coal dust, blowing device complexity, investment, the operating cost height, more especially lack the inert gas source in, semiworks is difficult to use.

The utility model purpose is to avoid above-mentioned weak point of the prior art and a kind of pulverized coal injection in blast furnace device is provided.

The purpose of this utility model is achieved by the following technical solution:

Comprise exhaust cloth bag 1, collection coal bunker 2, electronic scales 3 during the pulverized coal injection in blast furnace device is formed, go up coal dust valve 4, upper coal storing pipe 5, down coal dust valve 6, lower coal storing pipe 7, mixing tank 8, down inflation valve 9, go up inflation valve 10.Collection coal bunker 2 is positioned at the top of pulverized coal injection in blast furnace device, which is provided with exhaust cloth bag 1, and electronic scales 3 is housed.Collection coal bunker 2 end openings are connected with upper coal storing pipe 5 tops by last coal dust valve 4, and coal dust valve 6 linked to each other with lower coal storing pipe 7 tops under upper coal storing pipe 5 bottoms were passed through, and lower coal storing pipe 7 bottoms connect mixing tank 8.Pipeline 11 connects upper coal storing pipe 5 and lower coal storing pipe 7, inflation valve 9 is housed down on the pipeline 11, goes up inflation valve 10.The volume of upper coal storing pipe 5 and lower coal storing pipe 7 all is designed to≤0.025m ³That is, upper coal storing pipe 5 and lower coal storing pipe 7 are become vessels not under pressure by pressurized vessel, like this, though upper coal storing pipe 5 and lower coal storing pipe 7 bear high pressure, according to national standard, because its volume is no more than 0.025m ³, do not belong to pressurized vessel, so upper coal storing pipe 5 and lower coal storing pipe 7 need not make blanketing with inert gas.

The utility model adopts the normal pressure blowing device promptly to reach the high pressure blow smelting operation effect, has improved the security of coal injection.Use the utility model high bituminous coal of volatile matter of can jetting, improve the winding-up effect, simultaneously, can greatly reduce blowing device and process costs, enlarge the scope of application of coal-injection process.

Accompanying drawing is the structural representation of an embodiment of the utility model.

Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment:

Comprise exhaust cloth bag 1, collection coal bunker 2, electronic scales 3 during the utility model is formed, go up coal dust valve 4, upper coal storing pipe 5, down coal dust valve 6, lower coal storing pipe 7, mixing tank 8, down inflation valve 9, go up inflation valve 10.Collection coal bunker 2 is positioned at the top of pulverized coal injection in blast furnace device, which is provided with exhaust cloth bag 1, and electronic scales 3 is housed.Collection coal bunker 2 end openings are connected with upper coal storing pipe 5 tops by last coal dust valve 4, and coal dust valve 6 linked to each other with lower coal storing pipe 7 tops under upper coal storing pipe 5 bottoms were passed through, and lower coal storing pipe 7 bottoms connect mixing tank 8.Pipeline 11 connects upper coal storing pipe 5 and lower coal storing pipe 7, inflation valve 9 is housed down on the pipeline 11, goes up inflation valve 10.The volume of upper coal storing pipe 5 and lower coal storing pipe 7 is 0.005m ³--0.025m ³That is, upper coal storing pipe 5 and lower coal storing pipe 7 are become vessels not under pressure by pressurized vessel, like this, though upper coal storing pipe 5 and lower coal storing pipe 7 bear high pressure, according to national standard, because its volume is no more than 0.025m ³, do not belong to pressurized vessel, can remove protection of inert gas from.

During use, coal dust falls into upper coal storing pipe 5 by collection coal bunker 2 through upper pulverized coal valve 4 by deadweight, behind upper pulverized coal valve 4 time-delay closings, charge valve 10 in the unlatching, after treating that pressure and lower coal storing pipe 7 interior pressure in the upper coal storing pipe 5 equate, after opening lower pulverized coal valve 6 and time-delay, coal dust in the upper coal storing pipe 5 is unsnatched, close lower pulverized coal valve, close simultaneously and close charge valve 10, pulverized coal valve 4 in the unlatching, and the overbottom pressure blowback in the upper coal storing pipe 5 is arrived in the collection coal bunker 2, because the coal dust in the collection coal bunker 2 is stirred in the blowback air-blowing, guaranteed that coal dust falls in the upper coal storing pipe 5 swimmingly from collection coal bunker 2, closed at once after upper pulverized coal valve 4 time-delays, begun then next time cycling.Electronic scale 3 can accurately show coal dust weight and the coal powder injection speed in the lower coal storing pipe 7.

Even upper coal storing pipe 5, lower coal storing pipe 7 coal dust explosions, upper pulverized coal valve 4 and lower pulverized coal valve 6 just can be opened release automatically, namely go up the effect that pulverized coal valve 4, lower pulverized coal valve 6 can arrive blast hole, and simultaneously, the coal dusts in the collection coal bunker 2 fall fast, super effect to extinguishing chemical.

Claims

1. blast-furnace coal injection device, comprise exhaust cloth bag (1) in the composition, collection coal bunker (2), electronic scale (3), upper pulverized coal valve (4), lower pulverized coal valve (6), blender (8), lower charge valve (9), upper charge valve (10), pipeline (11), collection coal bunker (2) is positioned at the top of blast-furnace coal injection device, which is provided with exhaust cloth bag (1), and electronic scale (3) is housed, collection coal bunker (2) end opening is connected with pulverized coal valve (4), lower charge valve (9) is housed on the pipeline (11), upper charge valve (10), also comprise upper coal storing pipe (5) in it is characterized in that forming, lower coal storing pipe (7), upper pulverized coal valve (4) is connected with upper coal storing pipe (5) top, upper coal storing pipe (5) bottom links to each other with lower coal storing pipe (7) top by lower pulverized coal valve (6), and the volume of lower coal storing pipe and lower coal storing pipe (7) respectively is≤0.025m ³

2. the blast-furnace coal injection device according to claim 1 is characterized in that the volume of said upper coal storing pipe (5) and lower coal storing pipe (7) respectively is 0.005m ³--0.025m ³