CN101781692B - Blast-furnace coal powder injection method and system thereof - Google Patents

Blast-furnace coal powder injection method and system thereof Download PDF

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Publication number
CN101781692B
CN101781692B CN2009101913389A CN200910191338A CN101781692B CN 101781692 B CN101781692 B CN 101781692B CN 2009101913389 A CN2009101913389 A CN 2009101913389A CN 200910191338 A CN200910191338 A CN 200910191338A CN 101781692 B CN101781692 B CN 101781692B
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China
Prior art keywords
gas
jar
winding
blast
coal powder
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CN2009101913389A
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Chinese (zh)
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CN101781692A (en
Inventor
牛立祥
颜新
王贤
吴波
张�杰
肖卫锋
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中冶赛迪工程技术股份有限公司
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Publication of CN101781692A publication Critical patent/CN101781692A/en
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    • Y02W30/54

Abstract

The invention discloses a blast-furnace coal powder injection method and a system thereof. The method comprises the following steps: A, arranging coal powder stored in a coal powder bin in an injecting tank of an injecting tank group; B, pressurizing the injecting tank by using the high pressure gas obtained from a factory-supplied gas system, and injecting the coal powder into a blast furnace; and C, depressurizing the high pressure gas in the injecting tank, and then directly discharging into the coal powder bin, wherein a step C' needs to be done before the step C, and a step B' needs to be done before the step B. The step C' comprises the following steps: communicating the injecting tank with a gas container, and depressurizing the gas container by using the injecting tank. The step B' comprises the following steps: communicating the injecting tank with the gas container, and pressurizing the injecting tank by using the gas container. The invention can realize the effective recycle of the gas depressurized by the injecting tank, reduce the gas consumption of the powder making and injecting system, save the production cost, reduce the depressurized pressure difference of the depressurization system, decrease the maximum instant depressurized gas flow, reduce the impact on pipelines in the depressurization process, improve the operation stability of the system, and achieve high gas recovery rate.

Description

A kind of blast-furnace coal powder injection method and system thereof

Technical field

The present invention relates to a kind of blast-furnace coal powder injection technology and system thereof.

Background technology

All adopt the high pressure nitrogen pulverized coal conveying in the blast-furnace coal powder injection process system of present stage, winding-up is big with nitrogen pressure height, demand, and the breeze blowing process is the periodic cycle work of " dress powder-pressurization-winding-up-pressure release-dress powder ", all will be through pressurization, these two working process of pressure release in each cycle.Pressurization need meet factory to be carried out for technology nitrogen, and the nitrogen of pressure leak process directly enters Pulverized Coal Bin after directly the high pressure gas in the jar not being reduced pressure by reducing valve through comprehensive utilization, and nitrogen is a no small waste, has increased production cost.The High Pressure Difference of pressure leak process also has very big impact to the relief pipeline system in addition, and the moment pressure release is large-minded, and the shortcomings such as weighing system that influence Pulverized Coal Bin are the hidden danger of blast-furnace coal powder injection security of system steady running always.

Summary of the invention

First purpose of the present invention provides a kind of blast-furnace coal powder injection method of recyclable utilization winding-up jar inner high voltage gas.

To achieve these goals, by the following technical solutions:

A kind of blast-furnace coal powder injection method, described method comprise the following steps: A, the coal dust in the Pulverized Coal Bin are placed the winding-up jar interior winding-up jar of group; B, utilize the high pressure gas from supplied gas system of factory, obtain jet jar to pressurize and coal dust is blown into blast furnace; Directly enter Pulverized Coal Bin behind the high pressure air reducing in C, the jar of will jetting, it is characterized in that: also comprise step C ' before the described step C, also comprise step B ' before the step B;

Wherein step C ' is: the jar of will jetting is connected with gas-holder, and the winding-up jar is to the gas-holder pressure release;

Step B ' is: the jar of will jetting is connected with gas-holder, and gas-holder is to winding-up jar pressurization.

Gas through decompression among the described step C also can be disposed to sack cleaner.

Second purpose of the present invention provides a kind of realization first purpose blast-furnace coal powder injection system.

To achieve these goals, by the following technical solutions:

A kind of blast-furnace coal powder injection system, described system comprise by having valve pipeline respectively with winding-up jar factory's gas supply system that group links to each other Pulverized Coal Bin of unifying, the winding-up jar is organized by pipe connection to blast furnace, described winding-up jar group also is connected to the top of Pulverized Coal Bin by the relief pipeline that has reducing valve, described winding-up jar group also the pipe connection by having valve respectively to gas-holder.

Also sack cleaner is arranged on the relief pipeline between described reducing valve and the Pulverized Coal Bin by the pipe connection that has valve.

Beneficial effect of the present invention is:

(1) setting by gas-holder, utilized storage winding-up jar pressure release gas to fill pressurization for dress powder jar is counter, made full use of existing gaseous tension and saved factory's supplied gas again, can save pressurization, reduced the breeze blowing system operation cost with 10%~50% of gas.

(2) by the setting of gas-holder, the winding-up jar pressure release pressure difference to Pulverized Coal Bin has had remarkable reduction, and moment, maximum pressure release tolerance reduced, and has reduced the influence of pressure release to tubing system impact and other system of powder process injection system.

The present invention can make winding-up jar pressure release gas effectively be recycled as can be known in sum, reduce the consumption of powder process injection system gas, save production cost, reduced pressure relief system pressure release pressure reduction simultaneously, reduce maximum instantaneous pressure release tolerance, reduce the impact of pressure leak process, improve system's operation stability, and technology is simple, gas reclaiming rate is high pipeline.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Among the figure, part 1 is a supplied gas system of factory, and part 2 is a sack cleaner, and part 3 is a Pulverized Coal Bin, and part 4 is a gas-holder, and part 5 is winding-up jar group, and part 6 is a valve, and part 7 is a reducing valve, and part 7 ' is a relief pipeline, and part 8 is a valve, and part 8 ' is a pipeline, and part 9 is a valve, and part 9 ' is a pipeline

Embodiment

Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with drawings and Examples the present invention is done further and to set forth, explanation by embodiment can have further understanding to technology section of saying and the effect that the present invention taked, but the present invention not only limits to therewith.

The factory that chooses in the following example is a nitrogen for process gas, can certainly select other suitable gas for use.

A kind of blast-furnace coal powder injection method, described method comprises the following steps:

Coal dust in the Pulverized Coal Bin is placed the winding-up jar interior winding-up jar of group; The jar of will jetting is connected with gas-holder.To jet jar pressurization and coal dust is blown into blast furnace of the high pressure gas that utilization obtains from supplied gas system of factory; The jar of will jetting is connected with gas-holder; To directly enter Pulverized Coal Bin or sack cleaner behind the high pressure air reducing in the winding-up jar;

A kind of blast-furnace coal powder injection system, comprise by the pipeline that has valve and organize 5 supplied gas system 1 of factory and the Pulverized Coal Bin 3 that link to each other with the winding-up jar respectively, the winding-up jar the group 5 by pipe connection to blast furnace, winding-up jar group 5 also is connected to the top of Pulverized Coal Bin 3 by the relief pipeline 7 ' that has reducing valve 7, a winding-up jar group 5 also is connected to gas-holder 4 by the pipeline 8 ', 9 ' that has valve 8,9 respectively.Also sack cleaner 2 is arranged on the relief pipeline 7 ' between reducing valve 7 and the Pulverized Coal Bin 3 by the pipe connection that has valve 6.

One jar of winding-up finishes to enter the pressure release stage in the winding-up jar group 5 of powder process, at first closes and jar valve of the group 5 supplied gas systems of factory 1 that link to each other of jetting, and opens the valve 8 of this jar of UNICOM and gas-holder 4.Gas-holder 4 is in low-pressure state, and winding-up jar 5 high pressure that are in when jetting, pipeline 8 ' is communicated with back winding-up jar 5 inner high voltage gases and enters in the gas-holder 4, stablizes the nitrogen that has stored certain pressure in the gas-holder 4 of back, blowing tank pressure obviously descends, and closes the valve 8 of this jar of UNICOM and gas-holder 4 this moment.Open reducing valve 7 or valve 6, the high pressure gas of winding-up jar 5 are to Pulverized Coal Bin 3 pressure releases or be disposed to sack cleaner 2; After pressure release is finished, valve-off 6 and reducing valve 7, the valve of opening Pulverized Coal Bin 3 and winding-up jar 5 loads coal dust, after the filling coal dust is finished, closes the valve of Pulverized Coal Bin 3 and winding-up jar 5.Winding-up jar 5 internal pressures are very low (Pulverized Coal Bin pressure), open the valve 9 of this jar of UNICOM and gas-holder 4, pipeline 9 ' connection back gas-holder 4 inner high voltage gases enter in the winding-up jar 5, carry out anti-pressurising process by 4 pairs of winding-up jars 5 of gas-holder nitrogen, and valve-off 9 after pressure-stabilisation.To jet and wait for winding-up after jar 5 access factories continue to be forced into setting pressure for technology nitrogen system 1, the pressure of gas-holder 4 can enter next working cycle, the sustainable operation of system through pressure after jar 5 pressurisings of jetting is reduced.

Claims (4)

1. blast-furnace coal powder injection method, described method comprise the following steps: A, the coal dust in the Pulverized Coal Bin are placed a winding-up jar in the winding-up jar group; B, utilize the high pressure gas from supplied gas system of factory, obtain jet jar to pressurize and coal dust is blown into blast furnace; Directly enter Pulverized Coal Bin behind the high pressure air reducing in C, the jar of will jetting, it is characterized in that: also comprise step C ' before the described step C, also comprise step B ' before the step B;
Wherein step C ' is: the jar of will jetting is connected with gas-holder, and the winding-up jar is to the gas-holder pressure release;
Step B ' is: the jar of will jetting is connected with gas-holder, and gas-holder is to winding-up jar pressurization.
2. blast-furnace coal powder injection method as claimed in claim 1 is characterized in that: the gaseous emission of process decompression is to sack cleaner among the described step C.
3. blast-furnace coal powder injection system that is used to realize the described method of claim 1, described system comprises supplied gas system of factory (1) and the Pulverized Coal Bin (3) that links to each other with winding-up jar group (5) respectively by the pipeline that has valve, the winding-up jar the group (5) by pipe connection to blast furnace, described winding-up jar group (5) also is connected to the top of Pulverized Coal Bin (3) by the relief pipeline (7 ') that has reducing valve (7), it is characterized in that: a described winding-up jar group (5) also is connected to gas-holder (4) by the pipeline (8 ', 9 ') that has valve (8,9) respectively.
4. blast-furnace coal powder injection as claimed in claim 3 system is characterized in that: also by the pipe connection that has valve (6) sack cleaner (2) is arranged on the relief pipeline (7 ') between described reducing valve (7) and the Pulverized Coal Bin (3).
CN2009101913389A 2009-11-06 2009-11-06 Blast-furnace coal powder injection method and system thereof CN101781692B (en)

Priority Applications (1)

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CN2009101913389A CN101781692B (en) 2009-11-06 2009-11-06 Blast-furnace coal powder injection method and system thereof

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Application Number Priority Date Filing Date Title
CN2009101913389A CN101781692B (en) 2009-11-06 2009-11-06 Blast-furnace coal powder injection method and system thereof

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CN101781692B true CN101781692B (en) 2011-05-04

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101921886B (en) * 2010-08-05 2011-11-09 中冶南方工程技术有限公司 Method for controlling coal injecting rate of blast furnace
CN102719292A (en) * 2012-07-03 2012-10-10 中冶赛迪工程技术股份有限公司 Process and system for preparing blast furnace pulverized coal injection by utilizing waste gas of hot blast stove only
CN102978310B (en) * 2012-12-17 2014-09-10 武汉钢铁(集团)公司 Coal powder injection method for blast furnace
CN105177201B (en) * 2015-08-11 2017-04-12 邯钢集团邯宝钢铁有限公司 Improved blast furnace coal injection tank and injection method
CN108342576A (en) * 2018-02-28 2018-07-31 武汉工程大学 Cold rolling chromium-bearing sludge adding apparatus and its treatment process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2341103Y (en) * 1998-06-03 1999-09-29 李庆国 Coal powder sprayer for blast furnace

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2341103Y (en) * 1998-06-03 1999-09-29 李庆国 Coal powder sprayer for blast furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张涛 等.昆钢6号高炉煤粉喷吹系统设计及运行效果.《炼铁》.2001,第20卷(第6期), *

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