CN203393169U - Nitrogen recovery device of blast furnace coal injection system - Google Patents

Nitrogen recovery device of blast furnace coal injection system Download PDF

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Publication number
CN203393169U
CN203393169U CN201320403766.5U CN201320403766U CN203393169U CN 203393169 U CN203393169 U CN 203393169U CN 201320403766 U CN201320403766 U CN 201320403766U CN 203393169 U CN203393169 U CN 203393169U
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CN
China
Prior art keywords
pressure relief
pressure release
nitrogen
injection
valve
Prior art date
Application number
CN201320403766.5U
Other languages
Chinese (zh)
Inventor
林俊贤
张光鹏
解智芳
卢春平
Original Assignee
林俊贤
张光鹏
解智芳
卢春平
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 林俊贤, 张光鹏, 解智芳, 卢春平 filed Critical 林俊贤
Priority to CN201320403766.5U priority Critical patent/CN203393169U/en
Application granted granted Critical
Publication of CN203393169U publication Critical patent/CN203393169U/en

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    • Y02P10/212

Abstract

The utility model discloses a nitrogen recovery device of a blast furnace coal injection system, which relates to the technical field of black metallurgical equipment. The nitrogen recovery device comprises a plurality of injection tanks and a bag collector, wherein a pressure relief tube with a pressure relief valve is arranged inside each injection tank; at least two pressure relief tubes are connected in series to form a pressure relief group; each pressure relief group is communicated with the bag collector through a master pressure relief tube; a master pressure relief valve is arranged on each master pressure relief tube; a plurality of manual valves connected in parallel are arranged between the master pressure relief valve and the bag collector; a changeover valve is arranged between each two adjacent pressure relief groups. As the device is additionally provided with the valves, internal nitrogen to be emptied selectively leaks to the injection tank which is full of coal dust, needs to be punched or contains a little of balanced pressure; nitrogen is effectively recycled again by carrying out pressure balance on the groups of injection tanks for a plurality of times; therefore, the effects of the lowest nitrogen cost consumed by coal injection and the least equipment wear and consumption are finally achieved, and the targets of reducing pig iron cost, and improving economic benefits and social benefits are achieved.

Description

Bf coal injection system nitrogen gas recovering apparatus

Technical field

Technical field

The utility model relates to ferrous metallurgy equipment technical field, especially a kind of bf coal injection system nitrogen gas recovering apparatus.

Background technology

Since reform and opening-up, steel industry has been realized high speed development, but along with the adjustment of Chinese national economy, national steel industry has entered mostly take intension as main speed benefit type developmental stage.Meanwhile, cost of material rises violently, the contradiction such as environmental pollution highlights.Affected by macro adjustments and controls, the working rate of construction market declines, and investment in fixed assets is significantly glided, the particularly demand atrophy of industry to steel such as railway, shipbuilding, oil, chemical industry, electric power, light industry, and the production marketing of steel industry and price fall after rise.Meanwhile, along with the further opening of China, China steel market integrates with World Iron & Steel market, and steel industry is also faced with the challenge of the C.I.S., Korea S and Brazilian cost advantage.

Because the overall manufacturing operation situation of steel industry is bad, a lot of Iron And Steel Companies will guarantee benefit, just require each operation to reduce costs energetically, not only to digest the disadvantageous effect that raw material and fuel quality glides and brings, also, than obtaining larger progress former years, ratio of putting coke into furnace, fuel ratio and pig iron cost are further reduced.

And in this operation of bf coal injection system nitrogen recycling, as shown in Figure 1, its device comprises six winding-up tanks 1 and bagroom 2, each winding-up tank is equipped with the relief tube 4 with pressure release valve 3, after every three relief tubes series connection, by a pressure release house steward 5, be directly communicated with bagroom 2, after winding-up tank has sprayed coal dust, in tank, quite a few nitrogen of residue (pressure is at 0.8~1.1MPa) is directly let out bagroom by relief tube, if things go on like this, waste considerable nitrogen.

High-speed mixing pulverized coal flow moment arrival dust-precipitator, in grinding machine stopped status, causes dust-precipitator to run malleation, and coupled position often emits coal dust, affects environmental health.Bagroom air channel, valve and release pipeline are washed away for a long time simultaneously, very easily cause equipment attrition, scrap.

Utility model content

The utility model provides a kind of bf coal injection system nitrogen gas recovering apparatus, and it can solve prior art after winding-up tank spray sky, and nitrogen is directly let out wasting problem in bagroom.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: it comprises a plurality of winding-up tanks and bagroom, the tank of jetting described in each is equipped with the relief tube with pressure release valve, often after at least two relief tube series connection, form a pressure release group, described pressure release group is communicated with described bagroom by a pressure release house steward, described pressure release house steward is provided with pressure release main valve, between this pressure release main valve and described bagroom, is provided with a plurality of manual valves in parallel; Before the upper pressure release main valve of described pressure release house steward described in each between pressure release group, be provided with switching valve.

Owing to adopting technique scheme, the utlity model has following beneficial effect:

1, owing to being provided with switching valve between each pressure release group, its inside is needed emptying nitrogen selectively to let out to have filled coal dust and just needing to carry out punching press or balance has had a small amount of pressure winding-up tank, by many groups of winding-up tanks are carried out to repeatedly pressure equilibrium, effectively nitrogen is reused again, cause expellant gas amount and pressure for minimum, finally realize injecting coal quantity and consume nitrogen network minimal, equipment attrition, consumes least, thereby reach reduction pig iron cost, the object improving the economic and social benefits.

2, because pressure release house steward is provided with pressure release main valve, between this pressure release main valve and bagroom, be provided with a plurality of manual valves in parallel, whether by the switching of manual valve, overhaul all valve magnetic valves, tracheole, pipeline has gas leakage, and change in time, leak stopping.

Accompanying drawing explanation

Fig. 1 is the structural representation of prior art.

Fig. 2 is structural representation of the present utility model.

Embodiment

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

The present embodiment as shown in Figure 2, it comprises six winding-up tanks 1 and a bagroom 2, each winding-up tank 1 is equipped with the relief tube 4 with pressure release valve 3, after every three relief tubes, 4 series connection, form a pressure release group, pressure release group is communicated with bagroom 2 by a pressure release house steward 5, pressure release house steward 5 is provided with pressure release main valve 6, is provided with two manual valves 7 in parallel between this pressure release main valve and bagroom 2; Between each pressure release group, be provided with switching valve, this switching valve is contained in before the pressure release main valve 6 on pressure release house steward 5.

By four manual valves and the switching valve that increase by two pressure release main valves and corresponding maintenance, switch, realize nitrogen pressure equilibrium of forces and recycle and reuse.

This installs main effect is to reclaim to greatest extent the residue nitrogen in it to spraying empty rear winding-up tank, what by operation, increase rushes down pressure main valve, manual valve and switching valve, to its inside, need emptying nitrogen to carry out selectively, from standby winding-up tank, pressure letting out from high to low filled coal dust and just needed to carry out punching press or balance has had a small amount of pressure winding-up tank, by many groups of winding-up tanks are carried out to repeatedly pressure equilibrium, effectively nitrogen is reused again, cause expellant gas amount and pressure for minimum, finally realize injecting coal quantity and consume nitrogen network minimal, equipment attrition, consumes least, thereby reach reduction pig iron cost, the object improving the economic and social benefits.

The utility model is after half days on probation; get a desired effect; the nitrogen in full workshop consume usage quantity from before 55 cubic metres/ton, ton coal drop to 28 cubic metres/ton; before using, calculate with use is rear; can save 3,648 ten thousand yuan of nitrogen consuming cost, and reduced the wearing and tearing to pulverized coal preparation system cloth bag air channel, the phenomenon of having stopped cloth bag over-emitting black exhaust and affect environment occurs; reached object energy-saving and cost-reducing, protection of the environment, got an expected result; Meanwhile, use before the utility model high pressure relief frequently, cause pressure release to be flexible coupling and change frequently, using after the utility model pressure release to be flexible coupling does not need to change half a year, and valve, pipe wear life are more than 2 times.

Claims (1)

1. a bf coal injection system nitrogen gas recovering apparatus, comprise a plurality of winding-up tanks and bagroom, the tank of jetting described in each is equipped with the relief tube with pressure release valve, often after at least two relief tube series connection, form a pressure release group, described pressure release group is communicated with described bagroom by a pressure release house steward, it is characterized in that: described pressure release house steward is provided with pressure release main valve, between this pressure release main valve and described bagroom, be provided with a plurality of manual valves in parallel; Before the upper pressure release main valve of described pressure release house steward described in each between pressure release group, be provided with switching valve.
CN201320403766.5U 2013-07-09 2013-07-09 Nitrogen recovery device of blast furnace coal injection system CN203393169U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320403766.5U CN203393169U (en) 2013-07-09 2013-07-09 Nitrogen recovery device of blast furnace coal injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320403766.5U CN203393169U (en) 2013-07-09 2013-07-09 Nitrogen recovery device of blast furnace coal injection system

Publications (1)

Publication Number Publication Date
CN203393169U true CN203393169U (en) 2014-01-15

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Family Applications (1)

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CN201320403766.5U CN203393169U (en) 2013-07-09 2013-07-09 Nitrogen recovery device of blast furnace coal injection system

Country Status (1)

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CN (1) CN203393169U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104084701A (en) * 2014-06-20 2014-10-08 张婧如 Device for recovering nitrogen during laser cutting of wood
CN105441608A (en) * 2014-09-25 2016-03-30 鞍钢股份有限公司 Coal injection nitrogen recovery device and process
CN105624351A (en) * 2016-03-17 2016-06-01 中冶华天南京工程技术有限公司 Pulverized coal jetting, pressure releasing and powder returning technology and system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104084701A (en) * 2014-06-20 2014-10-08 张婧如 Device for recovering nitrogen during laser cutting of wood
CN104084701B (en) * 2014-06-20 2016-05-11 盐城雄鹰精密机械有限公司 Nitrogen gas recovering apparatus in timber laser cutting
CN105441608A (en) * 2014-09-25 2016-03-30 鞍钢股份有限公司 Coal injection nitrogen recovery device and process
CN105624351A (en) * 2016-03-17 2016-06-01 中冶华天南京工程技术有限公司 Pulverized coal jetting, pressure releasing and powder returning technology and system
CN105624351B (en) * 2016-03-17 2018-09-14 中冶华天南京工程技术有限公司 Breeze blowing pressure release back powder technique and system

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20140717

Address after: 545002 the Guangxi Zhuang Autonomous Region Liuzhou North Bird Road No. 117

Patentee after: Liuzhou Iron and Steel Co., Ltd.

Address before: 545002 the Guangxi Zhuang Autonomous Region Liuzhou North Bird Road No. 117

Patentee before: Lin Junxian

Patentee before: Zhang Guangpeng

Patentee before: Jie Zhifang

Patentee before: Lu Chunping

ASS Succession or assignment of patent right

Owner name: LIUZHOU IRON AND STEEL CO., LTD.

Free format text: FORMER OWNER: LIN JUNXIAN

Effective date: 20140717

Free format text: FORMER OWNER: ZHANG GUANGPENG JIE ZHIFANG LU CHUNPING

Effective date: 20140717

C41 Transfer of patent application or patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140115

Termination date: 20170709