CN107164589A - A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique and system - Google Patents
A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique and system Download PDFInfo
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- CN107164589A CN107164589A CN201710555852.0A CN201710555852A CN107164589A CN 107164589 A CN107164589 A CN 107164589A CN 201710555852 A CN201710555852 A CN 201710555852A CN 107164589 A CN107164589 A CN 107164589A
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- 239000003034 coal gas Substances 0.000 title claims abstract description 142
- 230000000740 bleeding effect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 238000010410 dusting Methods 0.000 claims abstract description 8
- 230000001133 acceleration Effects 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000003245 coal Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 9
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique, its feature is：When furnace roof batch can row pressure, its internal pressure-equalizing and discharging coal gas enters coal gas blowback pipeline after cyclone dust collectors rough dusting, entered back into after manifold distributor in a plurality of coal gas blowback branch pipe, enter back into injector and mixing and acceleration under the injection of injection air-flow through injector form the fluid-mixing of high-voltage-stable, finally enter again by check-valves and blowback rifle from blast-furnace tuyere in State of Blast Furnace；The invention also discloses a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system.Using the present invention dust, CO and CO can be not only avoid to the carry out blowback of pressure-equalizing and discharging coal gas in furnace roof batch can2Deng directly discharging the environmental pollution that brings, and recycling for dust-laden coal gas is realized, relative to traditional gas recovery system, the system pilot process is few, and recovery utilization rate is high, practical.
Description
Technical field
The present invention relates to a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique and system.
Background technology
In blast furnace ironmaking, need will to press coal gas emptying before bell-less BF tep charging in batch can, and most of blast furnace at present
Pressure coal gas be only directly bled off after cyclone dust collectors rough dusting, a large amount of dust, CO and CO2Gas is directly discharged
Into air, serious environmental pollution is not only resulted in, is also a kind of serious energy waste for manufacturing enterprise.With
Country is increasingly strict to energy-saving and emission-reduction requirement, in the urgent need to carrying out effectively reclaiming to furnace top even pressure coal gas, utilizing, to reduce dirt
Dye, reduces energy resource consumption.
At present, the research about the recovery of furnace top material tank for blast furnace emission coal gas is a lot, and Some Domestic blast furnace is also attempted to install additional
Press gas recovering device, but it is long-term normally use it is few.Tracing it to its cause mainly has：First, existing coal-gas recovering method efficiency
Low, low pressure stage coal gas can not reclaim and need directly discharge, and pollution can not be completely eliminated.Injection is carried out according to high pressure gas, can
To improve organic efficiency, but gas concentration reduction calorific value can be diluted, also just reduce the value of gas recovery；2nd, furnace roof is diffused
Coal gas intermittent discharge and instantaneous flow are big, and big to reclaiming pipe network impact, dust pelletizing system lacks stable operation condition, and dust removing effects are difficult to ensure
Card, the dust content of gas of recovery is high, it is grid-connected after clean coal gas pipe network is polluted, influence follow-up coal gas user normal production and
Service life of equipment；3rd, furnace roof emission coal gas recovery link is more, and the pressure loss is big, and the gas pressure of recovery is relatively low, if directly supplying
User uses, then needs increase equipment to be pressurizeed, add use cost.
Therefore, develop a kind of reliable, stably, applicable furnace top even pressure coal gas and utilize technique and system, be both national section
The requirement of energy emission reduction policy, is also the demand of manufacturing enterprise's production practices.
The content of the invention
The technical problem to be solved in the present invention is：A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique is provided and is
System, to realize that the direct blowback of pressure-equalizing and discharging coal gas of blast furnace roof is recycled.
The technical scheme that the present invention solves technical problem is as follows：
A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique of the present invention, comprises the following steps：
A) during the row pressure of furnace roof batch can, its internal pressure-equalizing and discharging coal gas is returned after cyclone dust collectors rough dusting into coal gas
Blowpipe road；
B) pressure-equalizing and discharging coal gas is entered back into by coal gas blowback pipeline and is divided into coal gas blowback pipeline by manifold distributor
A plurality of coal gas blowback branch pipe in, injector that then pressure-equalizing and discharging coal gas is entered back into each coal gas blowback branch pipe and in the injection
Mixing and acceleration under the injection of injection air-flow in the injection feed channel that device is connected through injector form high-voltage-stable
Fluid-mixing；
C) fluid-mixing of last high-voltage-stable enters in State of Blast Furnace by check-valves and blowback rifle from blast-furnace tuyere again.
Further, injection air-flow is combustion-supporting property gas in the step b), and its pressure is 0.3MPa~0.55MPa.
Further, coal gas blowback valve is provided with the coal gas blowback pipeline in the step a) and step b), coal gas is returned
Blow to be provided with branch pipe in branch pipe blowback valve, injection feed channel and be provided with drain valve；The branch pipe blowback valve and drain valve are
Regulating valve；Pressure is provided with before drain valve after branch pipe blowback valve on the coal gas blowback branch pipe and in injection feed channel
Power and flow detecting element, the branch pipe blowback valve and drain valve are anti-according to the pressure on respective pipeline and flow detecting element
Feedback signal carries out the regulation control of valve opening.
Another technical scheme for solving technical problem of the present invention is as follows：
A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system of the present invention, is characterized in：Including furnace roof batch can, press
Unloading valve, cyclone dust collectors, pressure-equalizing passageway, emergency diffusion pipeline, coal gas blowback pipeline, equal row pressure pipeline, coal gas blowback branch pipe,
Injection feed channel, injector, check-valves, blowback rifle and blast-furnace tuyere；The equal row pressure pipeline be provided with blank-plate valve, its one end with
Furnace roof batch can is connected, and its other end is connected with cyclone dust collectors；The upper end of the cyclone dust collectors is connected with pressure-equalizing passageway, urgent
Diffuse channel and coal gas blowback pipeline, its lower end, which is connected with, presses unloading valve, and this presses the unloading valve other end and equal row pressure pipeline
It is connected；Coal gas blowback valve and manifold distributor are sequentially provided with the coal gas blowback pipeline, the manifold distributor is connected with
A plurality of coal gas blowback branch pipe；Injector, check-valves and blowback rifle are sequentially provided with every coal gas blowback branch pipe；It is described to draw
Emitter has injector interface and is connected with injection feed channel；The outlet of the blowback rifle is connected with blast-furnace tuyere.
Further, it is provided with equalizing valve on the pressure-equalizing passageway；Be provided with the emergency diffusion pipeline diffusion valve and
Muffler.
Further, the injection feed channel is provided with drain valve；It is provided with the coal gas blowback branch pipe before injector
Branch pipe blowback valve；The drain valve and branch pipe blowback valve are regulating valve；In the injection feed channel before drain valve and the branch
Pressure and flow detecting element are equipped with after pipe blowback valve.
Further, the manifold distributor on the coal gas blowback pipeline is several.
Further, the ratio of number of the quantity of the coal gas blowback branch pipe and blast-furnace tuyere is 1：1、1：1/2、1：1/4
One in three ratios.
Further, the blowback rifle material is to have one-way check device on Wear-resistant, high-temperature resistant material, the blowback rifle.
Further, it is provided with external thermal insulation on the outside of the outside of the coal gas blowback pipeline and coal gas blowback branch pipe.
Had the advantage that using the present invention and effect：
1st, the direct blowback blast furnace of furnace roof emission coal gas, it is to avoid dust, CO and CO2Deng directly diffusing the dirt that is caused to environment
Dye, greatly reduces the environmental protection pressure of blast fumance.
2nd, technical process of the present invention is few, and utilization rate is high；System architecture of the present invention is simple, and effect is good, practicality
By force.
3rd, the CO contained in the emission coal gas for entering blast furnace from blast-furnace tuyere blowback2, CO and H2Deng by so that air port region
Reducing atmosphere increase, add blast-furnace shaft portion Fe indirect reduction with it is hydrocarbon use, improve energy utilization rate, subtract
Fuel consumption is lacked.
Brief description of the drawings
Fig. 1 is blast furnace top pressure-equalizing bleeding coal gas air port blowback system structural representation of the present invention；
In figure：1. blank-plate valve, 2. press unloading valve, 3. cyclone dust collectors, 4. equalizing valves, 5. diffusion valves, 6. mufflers, 7.
Coal gas blowback valve, 8. manifold distributors, 9. branch pipe blowback valves, 10. injectors, 11. drain valves, 12. check-valves, 13. blowbacks
Rifle, 14. pressure-equalizing passageways, 15. emergency diffusion pipelines, 16. coal gas blowback pipelines, 17. coal gas blowback branch pipes, 18. injection feed channels,
19. furnace roof batch can, 20. blast-furnace tuyeres, 21. injector interfaces, 22. equal row pressure pipelines.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1：
As shown in figure 1, a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique of the invention, comprises the following steps：
A) during 19 row pressure of furnace roof batch can, its internal pressure-equalizing and discharging coal gas enters coal after the rough dusting of cyclone dust collectors 3
Gas blowback pipeline 16；
B) pressure-equalizing and discharging coal gas is entered back into coal gas blowback pipeline 16 by manifold distributor 8 by coal gas blowback pipeline 16
In a plurality of coal gas blowback branch pipe 17 being divided into, the injector 10 that then pressure-equalizing and discharging coal gas is entered back into each coal gas blowback branch pipe 17
And mixing and acceleration through injector 10 under the injection of the injection air-flow in the injection feed channel 18 that the injector 10 is connected
Effect forms the fluid-mixing of high-voltage-stable；
C) fluid-mixing of last high-voltage-stable enters blast furnace by check-valves 12 and blowback rifle 13 from blast-furnace tuyere 20 again
In stove.
Injection air-flow is combustion-supporting property gas in step b) described in the present embodiment, and the combustion-supporting property gas can be compressed air
Or oxygen, its pressure is 0.3MPa~0.55MPa.Using combustion-supporting property gas as the injection air-flow of injector 10 and ensure certain
Pressure, its with after pressure-equalizing and discharging gas mixing, can cause the mixed gas enter blast furnace after be fully burned, improve
The rate of recovery and utilization rate of emission coal gas.
Coal gas blowback valve 7, coal gas are provided with coal gas blowback pipeline in step a) described in the present embodiment and step b)
It is provided with blowback branch pipe 17 in branch pipe blowback valve 9, injection feed channel 18 and is provided with drain valve 11；The He of branch pipe blowback valve 9
Drain valve 11 is regulating valve；Drawing after the branch pipe blowback valve 9 on the coal gas blowback branch pipe 17 and in injection feed channel 18
Pressure and flow detecting element are provided with before stream valve 11, the branch pipe blowback valve 9 and drain valve 11 are according on respective pipeline
Pressure and flow detecting element feedback signal carry out valve opening regulation control.
Diffused gas in step a) described in the present embodiment in furnace roof batch can 19 can be removed by tangential direction into whirlwind
In dirt device 3, the efficiency of dust collection of cyclone dust collectors 3 can be so improved, and cause the dust collection that cyclone dust collectors 3 are filtered at this
,, can be by pressing coal gas or nitrogen by cyclone dust collectors in grading ring section when blast furnace carries out operation in the cone section of deduster
The dust blowback filtered out in 3 is entered in blast furnace bucket, to avoid the dust from causing environmental pollution into air.
Embodiment 2：
As shown in figure 1, a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system, is characterized in：Including furnace roof batch can
19th, unloading valve 2, cyclone dust collectors 3, pressure-equalizing passageway 14, emergency diffusion pipeline 15, coal gas blowback pipeline 16, equal discharge pressure pipe are pressed
Road 22, coal gas blowback branch pipe 17, injection feed channel 18, injector 10, check-valves 12, blowback rifle 13 and blast-furnace tuyere 20；It is described
Equal row pressure pipeline 22 is provided with blank-plate valve 1, and its one end is connected with furnace roof batch can 19, and its other end is connected with cyclone dust collectors 3；Institute
The upper end for stating cyclone dust collectors 3 is connected with pressure-equalizing passageway 14, emergency diffusion pipeline 15 and coal gas blowback pipeline 16, the connection of its lower end
There is pressure unloading valve 2, this presses the other end of unloading valve 2 to be connected with equal row pressure pipeline 22；On the coal gas blowback pipeline 16 successively
Provided with coal gas blowback valve 7 and manifold distributor 8, the manifold distributor 8 is connected with a plurality of coal gas blowback branch pipe 17；Every institute
State and injector 10, check-valves 12 and blowback rifle 13 are sequentially provided with coal gas blowback branch pipe 17；The injector 10 has injection
Device interface 21 is simultaneously connected with injection feed channel 18；The outlet of the blowback rifle 13 is connected with blast-furnace tuyere 20.
Described in the present embodiment during system operation, the pressure-equalizing and discharging coal gas in furnace roof batch can 20 is through equal row pressure pipeline 22 by cutting
Line direction enters cyclone dust collectors 3 and carries out rough dusting, and the cyclone dust collectors 3 have cone section, are filtered by cyclone dust collectors 3
Dust collection, if the pressure-equalizing and discharging coal gas through rough dusting does not possess blowback condition, passes through in the cone section of cyclone dust collectors 3
Emergency diffusion pipeline 15 is directly diffused, and is normally carried out with the equal row pressure for ensureing furnace roof batch can 19, when pressing through rough dusting
When scattered coal gas possesses blowback condition, then manifold distributor 8 is entered by the coal gas blowback valve 7 on coal gas blowback pipeline 16, led to
Cross after manifold distributor 8 is distributed even into a plurality of coal gas blowback branch pipe 17, subsequently into each bar coal gas blowback branch pipe 17
On injector 10 in and under the injection of high pressure injection gas, by the mixing and acceleration of the mixing section, accelerating sections of injector 10
Effect forms the fluid-mixing of high-voltage-stable, and finally the fluid sends into height through check-valves 12 and blowback rifle 13 by blast-furnace tuyere 20
Stove；The upper end of cyclone dust collectors 3 described in the present embodiment is connected with pressure-equalizing passageway 14, and lower end is connected with pressure unloading valve 2, and this is equal
The pressure other end of unloading valve 2 is connected with equal row pressure pipeline 22, in the grading ring section of blast furnace operation, calms the anger by pressure-equalizing passageway 14
Cyclone dust collectors 3 are forged to the dust collected in section and send into furnace roof batch can 19 by pressing unloading valve 2 through equal row pressure pipeline 22, it is to avoid
Dust is polluted into air.
Equalizing valve 4 is provided with pressure-equalizing passageway 14 described in the present embodiment；It is provided with and puts on the emergency diffusion pipeline 15
Dissipate valve 4 and muffler 6.The benefit so set on the twice pipeline is normal operation when being able to ensure that two pipeline works,
Simultaneously also can the operation of whole blast furnace top pressure-equalizing bleeding coal gas air port blowback system provide safeguard.
Injection feed channel described in the present embodiment 18 is provided with drain valve 11；Injector 10 on the coal gas blowback branch pipe 17
Before be provided with branch pipe blowback valve 9；The drain valve 11 and branch pipe blowback valve 9 are regulating valve；Drawing in the injection feed channel 18
Pressure and flow detecting element are equipped with after branch pipe blowback valve 9 before stream valve 11 and on coal gas blowback branch pipe 17.So set
The purpose put is, during pressure-equalizing and discharging coal gas blowback, and the pressure of starting stage furnace roof batch can 19 is high, from cyclone dust collectors
3 emission coal gas flow out is big, flow velocity is high, and blowback later stage 19 pressure of furnace roof batch can are low, from diffusing that cyclone dust collectors 3 come out
Gas flow is small, flow velocity is low, is this branch pipe blowback valve 9 and drain valve 11 selects regulating valve, after branch pipe blowback valve 9 and draws
Flow, pressure detecting element are equipped with before stream valve 11, is controlled by the feedback of the flow of these detecting elements, pressure signal
The valve opening of branch pipe blowback valve 9 and drain valve 11 is adjusted, to control emission coal gas collection process in coal gas blowback branch pipe 17.
Manifold distributor 8 on the pipeline of coal gas blowback described in the present embodiment 16 is several.Here in coal gas blowback
Several manifold distributors 8 are set on pipeline 16, pressure-equalizing and discharging coal gas can effectively be shunted, and draw a plurality of coal gas
Branch pipe 17 is reclaimed, the impact to recovery pipe network is reduced and meets the blowback needs of pressure-equalizing and discharging coal gas.
The quantity of the branch pipe of coal gas blowback described in the present embodiment 17 is 1 with the ratio of number of blast-furnace tuyere 20：1、1：1/2、
1：One in 1/4 3 ratios.Here one in the three ratios quantity and blast furnace that coal gas blowback branch pipe 17 is set is selected
Blowback rifle 13 in the quantity in air port 20, and each coal gas blowback branch pipe 17 is evenly distributed on blast furnace circumference, it is ensured that
During pressure-equalizing and discharging coal gas blowback, the emission coal gas amount, air quantity at the air port of blast-furnace tuyere 20 at blowback are equal on blast furnace circumferencial direction
Even distribution, it is to avoid cause blast furnace burden to go partially, influences the normal production of blast furnace.It is pointed out that furnace roof batch can 19 is pressed
Dissipate coal gas interruption and determine that the blowback of blast-furnace tuyere 20 is also what interruption was carried out, the tolerance of blowback will also be made to blast furnace air amount
Into certain influence, and influence is in cyclic fluctuation, but the tolerance of blast-furnace tuyere blowback only accounts for blast furnace air amount 2% or so, its
Ratio very little, thus this influence is very little.
The material of blowback rifle described in the present embodiment 13 is to have one-way check dress on Wear-resistant, high-temperature resistant material, the blowback rifle 13
Put.The material of blowback rifle 13 is that Wear-resistant, high-temperature resistant material is due to high temperature at the emission coal gas dust-laden and blast-furnace tuyere 20 of blowback
High pressure, meanwhile, one-way check device is set to prevent high furnace pressure shakiness from causing coal gas time in stove to alter.
The outside of the pipeline of coal gas blowback described in the present embodiment 16 and the outside of coal gas blowback branch pipe 17 are provided with outer guarantor
Warm layer.Here external thermal insulation is set in the outside of coal gas blowback pipeline 16 and the outside of coal gas blowback branch pipe 17, is to prevent
Emission coal gas condenses in coal gas blowback pipeline 16 and in coal gas blowback branch pipe 17 to be caused line clogging, reclaims difficult, by setting
The mode of external thermal insulation is put, external insulation or heat tracing can be carried out to two kinds of blowback pipelines, to maintain gas temperature in each pipeline
More than 80 DEG C, external thermal insulation here can be rock wool external thermal insulation, mineral wool external thermal insulation, steam tracing external thermal insulation.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique, comprises the following steps：
A) during furnace roof batch can (19) row pressure, its internal pressure-equalizing and discharging coal gas enters coal after cyclone dust collectors (3) rough dusting
Gas blowback pipeline (16)；
B) pressure-equalizing and discharging coal gas is entered back into coal gas blowback pipeline by manifold distributor (8) by coal gas blowback pipeline (16)
(16) in a plurality of coal gas blowback branch pipe (17) being divided into, then pressure-equalizing and discharging coal gas is entered back into each coal gas blowback branch pipe (17)
Through injector under the injection of injector (10) and the injection air-flow in the injection feed channel (18) that the injector (10) is connected
(10) mixing and acceleration forms the fluid-mixing of high-voltage-stable；
C) fluid-mixing of last high-voltage-stable enters high by check-valves (12) and blowback rifle (13) from blast-furnace tuyere (20) again
In stove stove.
2. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique according to claim 1, it is characterised in that：It is described
Injection air-flow is combustion-supporting property gas in step b), and its pressure is 0.3MPa~0.55MPa.
3. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique according to claim 1, it is characterised in that：It is described
It is provided with coal gas blowback valve (7), coal gas blowback branch pipe (17) and is provided with coal gas blowback pipeline in step a) and step b)
Drain valve (11) is provided with branch pipe blowback valve (9), injection feed channel (18)；The branch pipe blowback valve (9) and drain valve (11)
It is regulating valve；Drainage after branch pipe blowback valve (9) on the coal gas blowback branch pipe (17) and in injection feed channel (18)
Pressure and flow detecting element are provided with before valve (11), the branch pipe blowback valve (9) and drain valve (11) are according to each pipe
The feedback signal of pressure and flow detecting element on road carries out the regulation control of valve opening.
4. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system, it is characterised in that：Including furnace roof batch can (19), pressure is unloaded
Grey valve (2), cyclone dust collectors (3), pressure-equalizing passageway (14), emergency diffusion pipeline (15), coal gas blowback pipeline (16), equal discharge pressure pipe
Road (22), coal gas blowback branch pipe (17), injection feed channel (18), injector (10), check-valves (12), blowback rifle (13) and blast furnace
Air port (20)；The equal row pressure pipeline (22) is provided with blank-plate valve (1), and its one end is connected with furnace roof batch can (19), its other end
It is connected with cyclone dust collectors (3)；The upper end of the cyclone dust collectors (3) is connected with pressure-equalizing passageway (14), emergency diffusion pipeline
(15) and coal gas blowback pipeline (16), its lower end is connected with pressure unloading valve (2), and this presses unloading valve (2) other end with arranging
Pressure pipeline (22) is connected；Coal gas blowback valve (7) and manifold distributor (8) are sequentially provided with the coal gas blowback pipeline (16),
The manifold distributor (8) is connected with a plurality of coal gas blowback branch pipe (17)；On every coal gas blowback branch pipe (17) successively
Provided with injector (10), check-valves (12) and blowback rifle (13)；The injector (10) has injector interface (21) and with drawing
Pipeline (18) of emanating is connected；The outlet of the blowback rifle (13) is connected with blast-furnace tuyere (20).
5. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system according to claim 4, it is characterised in that：It is described equal
Equalizing valve (4) is provided with pressure pipeline (14)；Diffusion valve (5) and muffler (6) are provided with the emergency diffusion pipeline (15).
6. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system according to claim 4, it is characterised in that：It is described to draw
Pipeline (18) of emanating is provided with drain valve (11)；On the coal gas blowback branch pipe (17) branch pipe blowback is provided with before injector (10)
Valve (9)；The drain valve (11) and branch pipe blowback valve (9) are regulating valve；On the injection feed channel (18) drain valve (11) it
Pressure and flow detecting element are equipped with after preceding and described branch pipe blowback valve (9).
7. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system according to claim 4, it is characterised in that：The coal
Manifold distributor (8) on gas blowback pipeline (16) is several.
8. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system according to claim 4, it is characterised in that：The coal
The quantity of gas blowback branch pipe (17) is 1 with the ratio of number of blast-furnace tuyere (20)：1、1：1/2、1：One in 1/4 3 ratios
It is individual.
9. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system according to claim 4, it is characterised in that：Described time
Rifle (13) material is blown for Wear-resistant, high-temperature resistant material, and there is one-way check device on the blowback rifle (13).
10. a kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback system according to claim 4, it is characterised in that：It is described
External thermal insulation is provided with the outside of the outside of coal gas blowback pipeline (16) and coal gas blowback branch pipe (17).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710555852.0A CN107164589A (en) | 2017-07-10 | 2017-07-10 | A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710555852.0A CN107164589A (en) | 2017-07-10 | 2017-07-10 | A kind of blast furnace top pressure-equalizing bleeding coal gas air port blowback technique and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115638427A (en) * | 2022-11-17 | 2023-01-24 | 屯留县航泰清洁能源有限公司 | Gaseous whirl board equipartition ware of waste gas heat accumulation formula incinerator |
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| CN206109441U (en) * | 2016-08-08 | 2017-04-19 | 四川德胜集团钒钛有限公司 | Clean system is diffused in voltage -sharing |
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| FR2969175A1 (en) * | 2010-12-21 | 2012-06-22 | Air Liquide | PROCESS FOR OPERATING A HIGH-FURNACE INSTALLATION WITH RECYCLING OF GUEULARD GAS |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115638427A (en) * | 2022-11-17 | 2023-01-24 | 屯留县航泰清洁能源有限公司 | Gaseous whirl board equipartition ware of waste gas heat accumulation formula incinerator |
| CN115638427B (en) * | 2022-11-17 | 2023-03-28 | 屯留县航泰清洁能源有限公司 | Gaseous whirl board equipartition ware of waste gas heat accumulation formula incinerator |
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