CN104073581B - Force to reclaim process and the device of blast furnace out-spreading coal gas - Google Patents
Force to reclaim process and the device of blast furnace out-spreading coal gas Download PDFInfo
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- CN104073581B CN104073581B CN201410274381.2A CN201410274381A CN104073581B CN 104073581 B CN104073581 B CN 104073581B CN 201410274381 A CN201410274381 A CN 201410274381A CN 104073581 B CN104073581 B CN 104073581B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The present invention relates to force to reclaim the process of blast furnace out-spreading coal gas, while comprising the steps: to start to diffuse, adopt nature way of recycling, through pipeline, the coal gas weighing in batch can is introduced to dry bag-type dust remover, the purified gas after sack cleaner dedusting enters low pressure purified gas supervisor; In the time that in weighing batch can, gas pressure is reduced to setting value, start coal gas air exhauster secondary and force to reclaim emission coal gas, residual emission coal gas is entered to purified gas by fan outlet pipeline after sack cleaner dedusting and be responsible for; The present invention provides the device of realizing this process simultaneously. Compared with prior art, the invention has the beneficial effects as follows: the deficiency that has overcome natural gas recovery technique, adopt nature to reclaim with the secondary recovery mode of forcing recovery to combine blast furnace roof emission coal gas is realized to high efficiente callback, can in producing the time allowing, blast furnace (in 40 seconds) reclaim more than 90% blast furnace out-spreading coal gas, reduce environmental pollution, produce more obvious economic benefit simultaneously.
Description
Technical field
The present invention relates to blast furnace out-spreading coal-gas recovering technical field, relate in particular to a kind of technique of forcing to reclaim blast furnace out-spreading coal gasMethod and device.
Background technology
Adjustment of Top Charging Equipment needing regularly to weigh residual in batch can or great bell gas-tight silo in furnace charge processCoal gas is discharged in atmosphere, to open upper sealing valve or little clock equipment, will be subject to the furnace charge in batch can or little clock bucket to enter weighingBatch can or great bell storehouse, complete to blanking tank or the charging of great bell storehouse.
In blanking tank, in residual coal gas, CO concentration exceedes 20%, and dust content exceedes 5g/m3, its calorific value exceedes3000kj/Nm3, this gas discharging not only causes severe contamination to surrounding environment in atmosphere, is also the serious of secondary energy sourcesWaste, reclaiming this part coal gas is the needs of realizing energy-saving and emission-reduction, protection of the environment.
At present blast furnace out-spreading coal gas is only had to nature absorption method, i.e. coal gas overbottom pressure in utilization weighing batch can or in great bell storehouse certainlySo reclaim the shortcoming of this method: the one, can only recovery section coal gas, approximately 40% residual gas still will be discharged into atmosphereIn, atmosphere is polluted; The 2nd, recovery time is long, generally will exceed 1 minute, affects the normal material loading of blast furnace and production.
Summary of the invention
The invention provides a kind of process of forcing to reclaim blast furnace out-spreading coal gas, overcome natural gas recovery technique notFoot can (in 40 seconds) reclaim more than 90% blast furnace out-spreading coal gas in blast furnace is produced the time allowing, and reduces environment dirtDye, produce more obvious economic benefit simultaneously. The present invention provides the device that can realize process of the present invention simultaneously.
In order to achieve the above object, the present invention realizes by the following technical solutions:
Force to reclaim the process of blast furnace out-spreading coal gas, adopt nature to reclaim and force to reclaim the secondary recovery mode combiningBlast furnace roof emission coal gas is realized to high efficiente callback, and the emission coal gas rate of recovery exceedes 90%; Comprise the steps:
1), while starting to diffuse, utilize and weigh the two of self pressure of coal gas in batch can and outlet negative pressure that injector suction producesRecast use, introduces dry bag-type dust remover through pipeline by the coal gas weighing in batch can; Detailed process is: close muffler entranceStop valve, opens emission coal gas discharge pipe stop valve, coal-gas recovering control valve, coal gas air exhauster entrance stop valve, purified gasOutlet bypass pipe stop valve, is communicated with the gaspipe line that leads to purified gas supervisor; Open nitrogen stop valve, nitrogen enters coal gasInjector also produces low-pressure area in gas ejector exit, emission coal gas is dual self pressure and gas ejector draftUnder effect, enter sack cleaner, purified gas after sack cleaner dedusting enters purified gas supervisor through purified gas bypass pipe,Complete the once recovery of emission coal gas;
2) in the time that gas pressure is reduced to setting value in weighing batch can, reclaim latter stage at emission coal gas, start coal gas exhaustingMachine secondary is forced to reclaim emission coal gas, and residual emission coal gas is entered by fan outlet pipeline only after sack cleaner dedustingCoal gas supervisor;
3) in the time weighing pressure in batch can lower than lower limit, coal gas air exhauster quits work, close coal-gas recovering control valve,Close nitrogen stop valve, furnace top equipment starts normal charging;
4), in the time that coal gas air exhauster breaks down, utilize self pressure of emission coal gas and gas ejector to carry out emission coal gasRecovery; Now close coal gas air exhauster entrance stop valve, open purified gas outlet bypass pipe stop valve, open nitrogen cut-outValve, enters sack cleaner under the draft effect that emission coal gas produces at self pressure and injector, through sack cleaner dedustingAfter purified gas enter purified gas supervisor through purified gas bypass pipe, complete the recovery of emission coal gas; Now residual a small amount of in systemCoal gas, can enter atmosphere by noise reduction diffusion system, and operating procedure is: unlatching emission coal gas discharge pipe stop valve, unlatching disappearSound device entrance stop valve, now cuts out coal gas air exhauster entrance stop valve, cuts out purified gas outlet bypass pipe stop valve, cuts outCoal-gas recovering control valve, close nitrogen stop valve, in system residual coal gas after diffusing muffler noise reduction dedusting by diffusingPipe qualified discharge;
5) coal gas of sack cleaner is imported and exported on pipeline and is established difference gauge, when raw gas entrance and purified gas outlet pressure reduction△ P >=6.0kPa, adopts low-pressure nitrogen pulse dust cleaning, and after deashing, when pressure reduction≤2.0kPa, deashing process finishes; Concrete behaviourMake mode: close coal-gas recovering control valve, close coal gas air exhauster entrance stop valve, open nitrogen stop valve, open cloth bagDeduster blowback nitrogen pressure-reducing valve, unlatching purified gas outlet bypass pipe stop valve, blowback nitrogen enter cloth bag casing, pass through arteries and veinsRush the control of valve cloth bag is carried out to reverse gas cleaning operation, the dust stratification that is bonded in cloth bag outer surface is shaken off, and falls sack cleanerThe sack cleaner ash silo of below, blowback nitrogen enters purified gas supervisor through purified gas bypass pipe, completes nitrogen reverse gas cleaningOperation;
6) in the ash silo below Gas Cleaning With Bag House device, be provided with dust level-sensing device, in order to detect ash silo dust stratification situation; When long-pendingRed dog reaches in limited time, needs to discharge dust stratification; When ash discharge, dedusting ash suction vehicle is connected with sack cleaner ash releasing tube, ash siloInterior dust stratification is inhaled into suction vehicle; Be down to down in limited time when the dust stratification face in ash silo, stop ash discharge operation; Dedusting ash adopts suctionCar or pneumatic conveying mode are delivered to user's point.
Described sack cleaner is made up of 1 to 2 casing, and is working box; In the time of sack cleaner shut-down (breakdown) mainteance,Emission coal gas is realized qualified discharge by stock gas diffusing muffler and exhaust stack.
Described coal gas air exhauster adopts continuous duty, by motor variable-frequency speed-regulating control flow.
Described blast furnace purified gas dustiness≤5mg/m after bag-type dust purifies3, 200 DEG C of purified gas temperature <, pressure >20kPa。
For realizing the device of forcing the process that reclaims blast furnace out-spreading coal gas, comprise the furnace roof rough coal being communicated with successively by pipelineGas diffusion system, dedusting and precipitator dust reclaim system and emission coal gas recovery system, described furnace roof raw gas diffusion system is by claimingAmount batch can, diffusing muffler and exhaust stack composition; Described dedusting and precipitator dust reclaim system are removed by nitrogen gas delivery-line, cloth bagDirt device and dedusting ash suction vehicle composition; Described emission coal gas recovery system is gone out by gas ejector, coal gas air exhauster, purified gasMouth bypass pipe and purified gas supervisor composition.
Described furnace roof raw gas diffusion system emission coal gas discharge pipe and muffler inlet tube on establish stop valve; Described dedustingAnd the sack cleaner top of precipitator dust reclaim system establishes explosion relief valve, in nitrogen gas delivery-line, establish nitrogen stop valve and blowbackNitrogen pressure-reducing valve; Before the gas ejector of described emission coal gas recovery system, establish coal-gas recovering control valve, before coal gas air exhauster, establishEntrance stop valve, establishes stop valve on purified gas outlet bypass pipe.
The coal gas of described sack cleaner is imported and exported on pipeline and is established difference gauge.
Ash silo is established in described sack cleaner below, and ash releasing tube is established in ash silo below, establishes pendulum unloading valve and star and unload on ash releasing tubeAsh valve.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention has overcome the deficiency of natural gas recovery technique, adopts nature to reclaim and forces to reclaim the secondary recovery combiningMode realizes high efficiente callback to blast furnace roof emission coal gas, can in blast furnace is produced the time allowing, (in 40 seconds) reclaimMore than 90% blast furnace out-spreading coal gas, reduces environmental pollution, produces more obvious economic benefit simultaneously.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
In figure: 1. weigh batch can 2. emission coal gas discharge pipe 3. emission coal gas discharge pipe stop valve 4. muffler entrances and cutDisconnected valve 5. diffusing muffler 6. exhaust stack 7. coal-gas recovering control valve 8. gas ejector 9. sack cleaners enterMouth pipe 10. difference gauge 11. explosion relief valve 12. sack cleaner 13. coal gas air exhauster entrance stop valve 14. coalsGas air exhauster inlet tube 15. coal gas air exhauster outlet 16. blowback nitrogen pressure-reducing valve 17. nitrogen stop valve 18. clothBag dust collector ash silo 19. dedusting ash suction vehicle 20. purified gas bypass pipe 21. purified gas bypass pipe stop valve 22. coalsGas air exhauster 23. purified gas supervisors
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Seeing Fig. 1, is process chart of the present invention, and the process of blast furnace out-spreading coal gas is reclaimed in pressure of the present invention, adoptsWith naturally reclaiming with the secondary recovery mode of forcing recovery to combine, blast furnace roof emission coal gas is realized to high efficiente callback, diffuse coalGas recovery rate exceedes 90%; While comprising the steps: to start to diffuse, utilize and weigh self pressure of coal gas in batch can 1 and drawThe double action of the outlet negative pressure that emitter 8 suctions produce, introduces dry bag-type dedusting through pipeline by the coal gas weighing in batch can 1Device 12, the purified gas after sack cleaner 12 dedustings enters low pressure purified gas supervisor 23 through purified gas bypass pipe 20; WhenWeigh gas pressure in batch can 1 and be reduced to while setting value, reclaim latter stage at emission coal gas, start coal gas air exhauster 22 2Emission coal gas is reclaimed in inferior pressure, and residual emission coal gas is entered by fan outlet pipeline 15 after sack cleaner 12 dedustingsPurified gas supervisor 23; Dedusting ash adopts suction vehicle 19 or pneumatic conveying mode to deliver to user's point.
Described sack cleaner 12 is made up of 1 to 2 casing, and is working box; Stop work and examine when sack cleaner 12While repairing, emission coal gas is realized qualified discharge by stock gas diffusing muffler 5 and exhaust stack 6.
Described coal gas air exhauster 22 adopts continuous duty, by motor variable-frequency speed-regulating control flow, to adapt to coal gas diffusionIntermittently duty processed, eliminates the infringement that frequent starting causes motor, saves electric energy.
Described dust-removal cloth-bag adopts low-pressure nitrogen line pulse deashing, utilizes the intermittent time of coal gas diffusion to complete deashing operation;Pressure differential detection is established in sack cleaner 12 raw gas entrances 9 and purified gas outlet, when raw gas entrance 9 and purified gas outlet are pressedPoor △ P >=8.0kPa, carries out low-pressure nitrogen pulse dust cleaning to deduster 12; After deashing when pressure reduction≤2.0kPa, deashing mistakeJourney finishes.
In the ash silo 18 of described sack cleaner 12 belows, be provided with dust level-sensing device, in order to detect ash silo 18 dust stratification situations,When dust stratification face reaches in limited time, need to discharge dust stratification; When ash discharge, dedusting ash suction vehicle 19 is connected with sack cleaner ash releasing tube,Dust stratification in ash silo 18 is inhaled into suction vehicle 19; Be down to down in limited time when the dust stratification face in ash silo 18, stop ash discharge operation.
Described blast furnace purified gas dustiness≤5mg/m after bag-type dust purifies3, 200 DEG C of purified gas temperature <, pressure >20kPa。
Of the present invention for realizing the device of forcing the process that reclaims blast furnace out-spreading coal gas, comprise by pipeline and being communicated with successivelyFurnace roof raw gas diffusion system, dedusting and precipitator dust reclaim system and emission coal gas recovery system, described furnace roof raw gas is putLoose system forms by weighing batch can 1, diffusing muffler 5 and exhaust stack 6; Described dedusting and precipitator dust reclaim system are by nitrogenConveyance conduit, sack cleaner 12 and dedusting ash suction vehicle 19 form; Described emission coal gas recovery system is by gas ejector8, coal gas air exhauster 22, purified gas outlet bypass pipe 20 and purified gas supervisor 23 compositions.
Gas entry pipeline before gas ejector 8 is connected on the emission coal gas discharge pipe 2 before coal gas diffusion muffler 5, coalGas outlet tube after gas injection device 8 is also the gas entry pipe 9 of sack cleaner 12, and nitrogen gas delivery-line accesses respectivelyGas ejector 8 and sack cleaner 12; The purified gas output channel of sack cleaner 12 is divided into two-way, and a road is through coal gasAir exhauster 22 connects purified gas supervisor 23, and another road connects purified gas supervisor 23 through coal gas bypass pipe 20.
Described furnace roof raw gas diffusion system emission coal gas discharge pipe 2 and muffler inlet tube on establish stop valve 3,4;Explosion relief valve 11 is established on sack cleaner 12 tops of described dedusting and precipitator dust reclaim system, establishes nitrogen in nitrogen gas delivery-lineGas stop valve 17 and blowback nitrogen pressure-reducing valve 16; Before the gas ejector 8 of described emission coal gas recovery system, establish coal-gas recoveringControl valve 7, establishes entrance stop valve 13 before coal gas air exhauster 22, on purified gas outlet bypass pipe 20, establish stop valve 21.
The coal gas of described sack cleaner 12 is imported and exported on pipeline and is established difference gauge 10.
Ash silo 18 is established in described sack cleaner 12 belows, and ash releasing tube is established in ash silo below, on ash releasing tube, establish pendulum unloading valve andStar-shaped ash unloading valve.
Emptying when furnace charge in furnace roof weighing batch can 1, upper-lower seal valve, in the time cutting out, starts to reclaim emission coal gas. Specifically doMethod is: close muffler entrance stop valve 4, open emission coal gas discharge pipe stop valve 3, coal-gas recovering control valve 7, coalGas air exhauster entrance stop valve 13, purified gas outlet bypass pipe stop valve 21, make to lead to purified gas supervisor 23 gaspipe lineBe communicated with; Open nitrogen stop valve 17, nitrogen enters gas ejector 8 and produces low-pressure area in gas ejector 8 exits,Emission coal gas enters sack cleaner 12 under the double action of self pressure and gas ejector 8 drafts, through bag-type dustPurified gas after device 12 dedustings enters purified gas supervisor 24 through purified gas bypass pipe 20, completes the once recovery of emission coal gas.In the time weighing pressure in batch can 1 lower than setting value, open coal gas air exhauster 22, weigh the low pressure in batch can 1 and systemRemaining coal gas is forced to send into purified gas supervisor 23 by coal gas air exhauster 22, completes the secondary recovery of emission coal gas. Work as titleThe pressure of amount in batch can 1 is during lower than lower limit, and coal gas air exhauster 23 quits work, and closes coal-gas recovering control valve 7, closesClose nitrogen stop valve 17, furnace top equipment starts normal charging.
In the time that coal gas air exhauster 22 breaks down, utilize self pressure of emission coal gas and gas ejector 8 to diffuse coalThe recovery of gas. Now close coal gas air exhauster entrance stop valve 13, open purified gas outlet bypass pipe stop valve 21, openNitrogen stop valve 17, under the draft effect that emission coal gas produces at self pressure and injector 8, enter sack cleaner 12,Purified gas after sack cleaner 12 dedustings enters purified gas supervisor 24 through purified gas bypass pipe 20, completes emission coal gasRecovery. Now residual a small amount of coal gas in system, can enter atmosphere by noise reduction diffusion system, and operating procedure is: open and putLoose coal gas discharge pipe stop valve 3, open muffler entrance stop valve 4, now close coal gas air exhauster entrance stop valve 13,Close purified gas outlet bypass pipe stop valve 21, close coal-gas recovering control valve 7, close nitrogen stop valve 17, in systemResidual coal gas passes through exhaust stack 6 qualified discharges after diffusing muffler 5 noise reduction dedustings.
The coal gas of described sack cleaner is imported and exported on pipeline and is established difference gauge. When raw gas entrance and purified gas outlet pressure reduction△ P >=6.0kPa, need implement deashing operation to Gas Cleaning With Bag House device 12. Utilize the intermittent time of coal gas diffusion to carry out cloth bagDeashing operation, the duration of a coal gas diffusion is about 40s, about 150s of intermittent time, the reverse gas cleaning time is controlled atIn 100s.
Adopt low-pressure nitrogen pulse dust cleaning. After deashing, when pressure reduction≤2.0kPa, deashing process finishes.
The mode of operation of deashing operation: close coal-gas recovering control valve 7, close coal gas air exhauster entrance stop valve 13, openNitrogen stop valve 17, open sack cleaner blowback nitrogen pressure-reducing valve 16, open purified gas outlet bypass pipe stop valve 21,Blowback nitrogen enters cloth bag casing, by the control of pulse valve, cloth bag is carried out to reverse gas cleaning operation, is bonded in cloth bag outer surfaceDust stratification shaken off, fall the sack cleaner ash silo 18 of sack cleaner below, blowback nitrogen is through purified gas bypass pipe20 enter purified gas supervisor 24, complete the operation of nitrogen reverse gas cleaning.
In ash silo 18 below Gas Cleaning With Bag House device 12, be provided with dust level-sensing device, in order to detect ash silo dust stratification situation. WhenDust stratification face reaches in limited time, needs to discharge dust stratification. When ash discharge, dedusting ash suction vehicle 19 is connected with sack cleaner ash releasing tube,Dust stratification in ash silo 18 is inhaled into suction vehicle. Be down to down in limited time when the dust stratification face in ash silo 18, stop ash discharge operation.
Oval ball top, sack cleaner 12 tops is provided with explosion relief valve 11, in the time blasting in system, and anti-explosion safetyValve 11 is opened pressure release automatically, ensures security of system.
Taking dischargeable capacity as 3200m3Blast furnace be example, annual recyclable blast furnace out-spreading coal gas approximately 1.5 × 107Nm3, coal gas heatValue is pressed 3200kj/Nm3Calculate, the heat that gas recovery contains is about 48000Gj, and direct economic benefit exceedes 2,000,000 yuan.
Claims (8)
1. force to reclaim the process of blast furnace out-spreading coal gas, adopt nature to reclaim and force to reclaim the secondary recovery combiningMode realizes high efficiente callback to blast furnace roof emission coal gas, and the emission coal gas rate of recovery exceedes 90%; It is characterized in that, comprise asLower step:
1), while starting to diffuse, utilize and weigh the two of self pressure of coal gas in batch can and outlet negative pressure that injector suction producesRecast use, introduces dry bag-type dust remover through pipeline by the coal gas weighing in batch can; Detailed process is: close muffler entranceStop valve, opens emission coal gas discharge pipe stop valve, coal-gas recovering control valve, coal gas air exhauster entrance stop valve, purified gasOutlet bypass pipe stop valve, is communicated with the gaspipe line that leads to purified gas supervisor; Open nitrogen stop valve, nitrogen enters coal gasInjector also produces low-pressure area in gas ejector exit, emission coal gas is dual self pressure and gas ejector draftUnder effect, enter sack cleaner, purified gas after sack cleaner dedusting enters purified gas supervisor through purified gas bypass pipe,Complete the once recovery of emission coal gas;
2) in the time that gas pressure is reduced to setting value in weighing batch can, reclaim latter stage at emission coal gas, start coal gas exhaustingMachine secondary is forced to reclaim emission coal gas, and residual emission coal gas is entered by fan outlet pipeline only after sack cleaner dedustingCoal gas supervisor;
3) in the time weighing pressure in batch can lower than lower limit, coal gas air exhauster quits work, close coal-gas recovering control valve,Close nitrogen stop valve, furnace top equipment starts normal charging;
4), in the time that coal gas air exhauster breaks down, utilize self pressure of emission coal gas and gas ejector to carry out emission coal gasRecovery; Now close coal gas air exhauster entrance stop valve, open purified gas outlet bypass pipe stop valve, open nitrogen cut-outValve, enters sack cleaner under the draft effect that emission coal gas produces at self pressure and injector, through sack cleaner dedustingAfter purified gas enter purified gas supervisor through purified gas bypass pipe, complete the recovery of emission coal gas; Now residual a small amount of in systemCoal gas, can enter atmosphere by noise reduction diffusion system, and operating procedure is: unlatching emission coal gas discharge pipe stop valve, unlatching disappearSound device entrance stop valve, now cuts out coal gas air exhauster entrance stop valve, cuts out purified gas outlet bypass pipe stop valve, cuts outCoal-gas recovering control valve, close nitrogen stop valve, in system residual coal gas after diffusing muffler noise reduction dedusting by diffusingPipe qualified discharge;
5) coal gas of sack cleaner is imported and exported on pipeline and is established difference gauge, when raw gas entrance and purified gas outlet pressure reduction△ P >=6.0kPa, adopts low-pressure nitrogen pulse dust cleaning, and after deashing, when pressure reduction≤2.0kPa, deashing process finishes; Concrete behaviourMake mode: close coal-gas recovering control valve, close coal gas air exhauster entrance stop valve, open nitrogen stop valve, open cloth bagDeduster blowback nitrogen pressure-reducing valve, unlatching purified gas outlet bypass pipe stop valve, blowback nitrogen enter cloth bag casing, pass through arteries and veinsRush the control of valve cloth bag is carried out to reverse gas cleaning operation, the dust stratification that is bonded in cloth bag outer surface is shaken off, and falls sack cleanerThe sack cleaner ash silo of below, blowback nitrogen enters purified gas supervisor through purified gas bypass pipe, completes nitrogen reverse gas cleaningOperation;
6) in the ash silo below Gas Cleaning With Bag House device, be provided with dust level-sensing device, in order to detect ash silo dust stratification situation; When long-pendingRed dog reaches in limited time, needs to discharge dust stratification; When ash discharge, dedusting ash suction vehicle is connected with sack cleaner ash releasing tube, ash siloInterior dust stratification is inhaled into suction vehicle; Be down to down in limited time when the dust stratification face in ash silo, stop ash discharge operation; Dedusting ash adopts suctionCar or pneumatic conveying mode are delivered to user's point.
2. the process of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that described clothBag dust collector is made up of 1 to 2 casing, and is working box; In the time of sack cleaner shut-down (breakdown) mainteance, emission coal gas is logicalCross stock gas diffusing muffler and exhaust stack and realize qualified discharge.
3. the process of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that described coalGas air exhauster adopts continuous duty, by motor variable-frequency speed-regulating control flow.
4. the process of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that described warpBlast furnace purified gas dustiness≤5mg/m after bag-type dust purifies3, 200 DEG C of purified gas temperature <, pressure > 20kPa.
5. the device that reclaims the process of blast furnace out-spreading coal gas for realizing pressure claimed in claim 1, its feature existsIn, comprise that furnace roof raw gas diffusion system, dedusting and the precipitator dust reclaim system and the emission coal gas that are communicated with successively by pipeline reclaimSystem, described furnace roof raw gas diffusion system forms by weighing batch can, diffusing muffler and exhaust stack; Described dedusting and dedustingAsh recovery system is made up of nitrogen gas delivery-line, sack cleaner and dedusting ash suction vehicle; Described emission coal gas recovery system byGas ejector, coal gas air exhauster, purified gas outlet bypass pipe and purified gas supervisor composition.
6. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 5, it is characterized in that, described furnace roof is thickGas bleeding system emission coal gas discharge pipe and muffler inlet tube on establish stop valve; Described dedusting and precipitator dust reclaim systemExplosion relief valve is established on the sack cleaner top of system, establishes nitrogen stop valve and blowback nitrogen pressure-reducing valve in nitrogen gas delivery-line; InstituteBefore stating the gas ejector of emission coal gas recovery system, establish coal-gas recovering control valve, before coal gas air exhauster, establish entrance stop valve, cleanOn gas exit bypass pipe, establish stop valve.
7. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 5, it is characterized in that, described cloth bag removesThe coal gas of dirt device is imported and exported on pipeline and is established difference gauge.
8. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 5, it is characterized in that, described cloth bag removesAsh silo is established in dirt device below, and ash releasing tube is established in ash silo below, establishes pendulum unloading valve and star-shaped ash unloading valve on ash releasing tube.
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| CN106702052A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Blast furnace top pressure-equalizing gas recovery system and method |
| CN108570523A (en) * | 2017-03-07 | 2018-09-25 | 北京凯德恒源科技发展有限公司 | Blast furnace roof based on gas fan presses the full recovery method of coal gas |
| CN107419049B (en) * | 2017-08-01 | 2022-12-13 | 中冶焦耐(大连)工程技术有限公司 | Method for diffusing harmful gas in direct reduced iron shaft furnace raw material tower |
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| CN110004258B (en) * | 2019-04-02 | 2024-02-09 | 北京首钢国际工程技术有限公司 | Device for recycling blast furnace top pressure equalizing and diffusing gas |
| CN110699505A (en) * | 2019-11-14 | 2020-01-17 | 光阳工程技术有限公司 | Blast furnace gas dry dedusting clean gas blowback ash removal system |
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| CN102031321B (en) * | 2010-12-23 | 2012-09-05 | 中冶京诚工程技术有限公司 | Recovery method and recovery device for blast furnace top pressure-equalizing gas |
| CN202054851U (en) * | 2011-04-29 | 2011-11-30 | 中冶赛迪工程技术股份有限公司 | Blast-furnace dry-method even-pressure gas recycling device |
| CN102758042B (en) * | 2012-08-14 | 2013-09-25 | 唐忠库 | System for rotational flow dust removal and recovery of blast furnace roof raw gas and recovering method of blast furnace roof raw gas |
| CN102864257A (en) * | 2012-09-28 | 2013-01-09 | 中冶南方工程技术有限公司 | Pressure-equalizing and bleeding method for injecting furnace roof tank coal gas by using high-pressure gas |
| CN203923225U (en) * | 2014-06-18 | 2014-11-05 | 鞍钢集团工程技术有限公司 | Force to reclaim the device of blast furnace out-spreading coal gas |
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