CN203923225U - Force to reclaim the device of blast furnace out-spreading coal gas - Google Patents
Force to reclaim the device of blast furnace out-spreading coal gas Download PDFInfo
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- CN203923225U CN203923225U CN201420326347.0U CN201420326347U CN203923225U CN 203923225 U CN203923225 U CN 203923225U CN 201420326347 U CN201420326347 U CN 201420326347U CN 203923225 U CN203923225 U CN 203923225U
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- China
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- gas
- coal gas
- blast furnace
- reclaim
- sack cleaner
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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
Abstract
The utility model relates to the device of forcing to reclaim blast furnace out-spreading coal gas, comprise furnace roof raw gas diffusion system, dedusting and the precipitator dust reclaim system and the emission coal gas recovery system that are communicated with successively by pipeline, described furnace roof raw gas diffusion system forms by weighing batch can, diffusing muffler and bleeder; Described dedusting and precipitator dust reclaim system are made up of nitrogen gas delivery-line, sack cleaner and dedusting ash suction vehicle; Described emission coal gas recovery system is made up of gas ejector, coal gas vacuum fan, purified gas outlet bypass pipe and purified gas supervisor.Compared with prior art, the beneficial effects of the utility model are: 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 utility model relates to blast furnace out-spreading coal-gas recovering technical field, relates in particular to a kind of device of forcing to reclaim blast furnace out-spreading coal gas.
Background technology
Adjustment of Top Charging Equipment is regularly discharged into the residual coal gas weighing in batch can or great bell gas-tight silo in atmosphere needing in furnace charge process, to open upper sealing valve or little clock equipment, to be subject to the furnace charge in batch can or little clock bucket to enter weighing batch 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/m
3, its calorific value exceedes 3000kj/Nm
3, this gaseous emission not only causes severe contamination to surrounding environment in atmosphere, is also the serious waste of secondary energy, and 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, utilize the coal gas overbottom pressure weighing in batch can or in great bell storehouse naturally to reclaim, the shortcoming of this method: the one, can only recovery part coal gas, approximately 40% residual gas still will be discharged in atmosphere, and 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 utility model provides a kind of device of forcing to reclaim blast furnace out-spreading coal gas, overcome the deficiency of natural gas recovery mode, 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.
In order to achieve the above object, the utility model is realized by the following technical solutions:
Force to reclaim the device of blast furnace out-spreading coal gas, comprise furnace roof raw gas diffusion system, dedusting and the precipitator dust reclaim system and the emission coal gas recovery system that are communicated with successively by pipeline, described furnace roof raw gas diffusion system forms by weighing batch can, diffusing muffler and bleeder; Described dedusting and precipitator dust reclaim system are made up of nitrogen gas delivery-line, sack cleaner and dedusting ash suction vehicle; Described emission coal gas recovery system is made up of gas ejector, coal gas vacuum fan, purified gas outlet bypass pipe and purified gas supervisor.
Described furnace roof raw gas diffusion system emission coal gas vent pipe and sound damper inlet tube on establish trip valve; Explosion relief valve is established on the sack cleaner top of described dedusting and precipitator dust reclaim system, establishes nitrogen trip valve and blowback nitrogen reducing valve in nitrogen gas delivery-line; Before the gas ejector of described emission coal gas recovery system, establish coal-gas recovering control valve, before coal gas vacuum fan, establish entrance trip valve, on purified gas outlet bypass pipe, establish trip valve.
Described sack cleaner is made up of 1 to 2 casing, and is working box.
Described dust-removal cloth-bag adopts low-pressure nitrogen line pulse deashing, and differential pressure meter is established in sack cleaner raw gas entrance and purified gas outlet.
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-shaped ash unloading valve on ash releasing tube, and dedusting ash adopts suction vehicle or pneumatic conveying mode to deliver to user's point.
In the ash silo of described sack cleaner below, be provided with dust level gage.
Described coal gas vacuum fan adopts continuous duty, by motor variable-frequency speed-regulating control flow.
Compared with prior art, the beneficial effects of the utility model are:
The utility model has overcome the deficiency of natural gas recovery mode, 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.
Brief description of the drawings
Fig. 1 is equipment connection schematic diagram of the present utility model.
In figure: 1. weigh batch can 2. emission coal gas vent pipe 3. emission coal gas vent pipe trip valve 4. sound damper entrance trip valve 5. diffusing muffler 6. bleeder 7. coal-gas recovering control valve 8. gas ejector 9. sack cleaner inlet tube 10. differential pressure meter 11. explosion relief valve 12. sack cleaner 13. coal gas vacuum fan entrance trip valve 14. coal gas vacuum fan inlet tube 15. coal gas vacuum fan outlet pipe 16. blowback nitrogen reducing valve 17. nitrogen trip valve 18. sack cleaner ash silo 19. dedusting ash suction vehicle 20. purified gas bypass pipe 21. purified gas bypass pipe trip valve 22. coal gas vacuum fan 23. purified gas supervisors
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
See Fig. 1, it is equipment connection schematic diagram of the present utility model, the utility model forces to reclaim the device of blast furnace out-spreading coal gas, comprise furnace roof raw gas diffusion system, dedusting and the precipitator dust reclaim system and the emission coal gas recovery system that are communicated with successively by pipeline, described furnace roof raw gas diffusion system forms by weighing batch can 1, diffusing muffler 5 and bleeder 6; Described dedusting and precipitator dust reclaim system are made up of nitrogen gas delivery-line, sack cleaner 12 and dedusting ash suction vehicle 19; Described emission coal gas recovery system is made up of gas ejector 8, coal gas vacuum fan 22, purified gas outlet bypass pipe 20 and purified gas supervisor 23.
Gas entry pipeline before gas ejector 8 is connected on the emission coal gas vent pipe 2 before coal gas diffusion sound damper 5, gas outlet tube after gas ejector 8 is also the gas entry pipe 9 of sack cleaner 12, and nitrogen gas delivery-line accesses respectively gas ejector 8 and sack cleaner 12; The purified gas output channel of sack cleaner 12 is divided into two-way, and a road connects purified gas supervisor 23 through coal gas vacuum fan 22, and another road connects purified gas supervisor 23 through coal gas bypass pipe 20.
Described furnace roof raw gas diffusion system emission coal gas vent pipe 2 and sound damper inlet tube on establish trip valve 3,4; Explosion relief valve 11 is established on sack cleaner 12 tops of described dedusting and precipitator dust reclaim system, establishes nitrogen trip valve 17 and blowback nitrogen reducing valve 16 in nitrogen gas delivery-line; Before the gas ejector 8 of described emission coal gas recovery system, establish coal-gas recovering control valve 7, before coal gas vacuum fan 22, establish entrance trip valve 13, on purified gas outlet bypass pipe 20, establish trip valve 21.
Described sack cleaner 12 is made up of 1 to 2 casing, and is working box.
Described dust-removal cloth-bag 12 adopts low-pressure nitrogen line pulse deashing, and differential pressure meter 10 is established in sack cleaner raw gas entrance 9 and purified gas outlet.
Ash silo 18 is established in described sack cleaner 12 belows, and ash releasing tube is established in ash silo 18 belows, establishes pendulum unloading valve and star-shaped ash unloading valve on ash releasing tube, and dedusting ash adopts suction vehicle 19 or pneumatic conveying mode to deliver to user's point.
In the ash silo 18 of described sack cleaner 12 belows, be provided with dust level gage.
Described coal gas vacuum fan 22 adopts continuous duty, by motor variable-frequency speed-regulating control flow.
The utility model forces to reclaim the device of blast furnace out-spreading coal gas, is characterized in adopting 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, and the emission coal gas rate of recovery exceedes 90%; Its principle of work is: while starting to diffuse, utilize and weigh self pressure of coal gas in batch can 1 and the dual function of the outlet negative pressure that injector 8 suctions produce, through pipeline, the coal gas weighing in batch can 1 is introduced to dry bag-type dust remover 12, the purified gas after sack cleaner 12 dedustings enters low pressure purified gas supervisor 23 through purified gas bypass pipe 20; In the time that in weighing batch can 1, gas pressure is reduced to set(ting)value, reclaim latter stage at emission coal gas, start coal gas vacuum fan and force to reclaim emission coal gas for 22 2 times, residual emission coal gas is entered to purified gas supervisor 23 by fan outlet pipeline 15 after sack cleaner 12 dedustings; Dedusting ash adopts suction vehicle 19 or pneumatic conveying mode to deliver to user's point.
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.Specific practice is: close sound damper entrance trip valve 4, open emission coal gas vent pipe trip valve 3, coal-gas recovering control valve 7, coal gas vacuum fan entrance trip valve 13, purified gas outlet bypass pipe trip valve 21, the gaspipe line that leads to purified gas supervisor 23 is communicated with; Open nitrogen trip valve 17, nitrogen enters gas ejector 8 and in gas ejector 8 generation low pressure areas, exit, emission coal gas enters sack cleaner 12 under the dual function of self pressure and gas ejector 8 drafts, purified gas after sack cleaner 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 set(ting)value, the remaining coal gas of low pressure that open coal gas vacuum fan 22, weighs in batch can 1 and system is forced to send into purified gas supervisor 23 by coal gas vacuum fan 22, completes the secondary recovery of emission coal gas.In the time weighing pressure in batch can 1 lower than lower value, coal gas vacuum fan 22 quits work, and closes coal-gas recovering control valve 7, closes nitrogen trip valve 17, furnace top equipment starts normal charging.
In the time that coal gas vacuum fan 23 breaks down, utilize self pressure of emission coal gas and gas ejector 8 to carry out the recovery of emission coal gas.Now close coal gas vacuum fan entrance trip valve 13, open purified gas outlet bypass pipe trip valve 21, open nitrogen trip 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 the recovery of emission coal gas.Now residual a small amount of coal gas in system, can enter atmosphere by noise reduction diffusion system, operation steps is: open emission coal gas vent pipe trip valve 3, open sound damper entrance trip valve 4, now close coal gas vacuum fan entrance trip valve 13, close purified gas outlet bypass pipe trip valve 21, close coal-gas recovering control valve 7, close nitrogen trip valve 17, in system, residual coal gas passes through bleeder 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 differential pressure meter.As 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 the deashing operation of cloth bag, adopt low-pressure nitrogen pulse dust cleaning, the time length of a coal gas diffusion is about 40s, about 150s of intermittent time, and the reverse gas cleaning time is controlled in 100s.After deashing, when pressure reduction≤2.0kPa, deashing process finishes.
The operating method of deashing operation: close coal-gas recovering control valve 7, close coal gas vacuum fan entrance trip valve 13, open nitrogen trip valve 17, open sack cleaner blowback nitrogen reducing valve 16, open purified gas outlet bypass pipe trip valve 21, blowback nitrogen enters cloth bag casing, control by pulse valve is carried out reverse gas cleaning operation to cloth bag, the dust stratification that is bonded in cloth bag outside surface is shaken off, fall the sack cleaner ash silo 18 of sack cleaner below, blowback nitrogen enters purified gas supervisor 23 through purified gas bypass pipe 20, completes the operation of nitrogen reverse gas cleaning.
In ash silo 18 below Gas Cleaning With Bag House device 12, be provided with dust level gage, in order to detect ash silo dust stratification situation.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, the 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, and in the time blasting in system, explosion relief valve 11 is opened pressure release automatically, ensures security of system.
In the time of sack cleaner 12 break-down maintenance, emission coal gas diffuses by stock gas diffusing muffler 5 and bleeder 6.
Described coal gas vacuum fan 22 adopts continuous duty, by motor variable-frequency speed-regulating control flow, to adapt to the working order processed at intermittence of coal gas diffusion, eliminates the infringement that frequent starting causes motor, saves energy.
Blast furnace purified gas dustiness≤5mg/m after bag-type dust purifies
3, 120 DEG C～210 DEG C of purified gas temperature, pressure is 14～16kPa.
Taking useful volume as 3200m
3blast furnace be example, annual recyclable blast furnace out-spreading coal gas approximately 1.5 × 10
7nm
3, caloric power of gas is pressed 3200kj/Nm
3calculate, the heat that gas recovery contains is about 48000Gj, and direct economic benefit exceedes 2,000,000 yuan.
Claims (7)
1. force to reclaim the device of blast furnace out-spreading coal gas, it is characterized in that, comprise furnace roof raw gas diffusion system, dedusting and the precipitator dust reclaim system and the emission coal gas recovery system that are communicated with successively by pipeline, described furnace roof raw gas diffusion system forms by weighing batch can, diffusing muffler and bleeder; Described dedusting and precipitator dust reclaim system are made up of nitrogen gas delivery-line, sack cleaner and dedusting ash suction vehicle; Described emission coal gas recovery system is made up of gas ejector, coal gas vacuum fan, purified gas outlet bypass pipe and purified gas supervisor.
2. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that, described furnace roof raw gas diffusion system emission coal gas vent pipe and sound damper inlet tube on establish trip valve; Explosion relief valve is established on the sack cleaner top of described dedusting and precipitator dust reclaim system, establishes nitrogen trip valve and blowback nitrogen reducing valve in nitrogen gas delivery-line; Before the gas ejector of described emission coal gas recovery system, establish coal-gas recovering control valve, before coal gas vacuum fan, establish entrance trip valve, on purified gas outlet bypass pipe, establish trip valve.
3. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that, described sack cleaner is made up of 1 to 2 casing, and is working box.
4. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that, described dust-removal cloth-bag adopts low-pressure nitrogen line pulse deashing, and differential pressure meter is established in sack cleaner raw gas entrance and purified gas outlet.
5. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that, ash silo is established in described sack cleaner below, and ash releasing tube is established in ash silo below, on ash releasing tube, establish pendulum unloading valve and star-shaped ash unloading valve, dedusting ash adopts suction vehicle or pneumatic conveying mode to deliver to user's point.
6. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 5, it is characterized in that, in the ash silo of described sack cleaner below, is provided with dust level gage.
7. the device of blast furnace out-spreading coal gas is reclaimed in pressure according to claim 1, it is characterized in that, described coal gas vacuum fan adopts continuous duty, by motor variable-frequency speed-regulating control flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420326347.0U CN203923225U (en) | 2014-06-18 | 2014-06-18 | Force to reclaim the device of blast furnace out-spreading coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420326347.0U CN203923225U (en) | 2014-06-18 | 2014-06-18 | Force to reclaim the device of blast furnace out-spreading coal gas |
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| Publication Number | Publication Date |
|---|---|
| CN203923225U true CN203923225U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420326347.0U Expired - Fee Related CN203923225U (en) | 2014-06-18 | 2014-06-18 | Force to reclaim the device of blast furnace out-spreading coal gas |
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| CN (1) | CN203923225U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073581A (en) * | 2014-06-18 | 2014-10-01 | 鞍钢集团工程技术有限公司 | Process method and device for forcibly recovering diffused gas of blast furnace |
| CN110004258A (en) * | 2019-04-02 | 2019-07-12 | 北京首钢国际工程技术有限公司 | A kind of device recycling blast furnace top pressure-equalizing bleeding coal gas |
| CN110479594A (en) * | 2019-08-07 | 2019-11-22 | 李震 | A kind of separation system and method for Machine-made Sand dust |
-
2014
- 2014-06-18 CN CN201420326347.0U patent/CN203923225U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073581A (en) * | 2014-06-18 | 2014-10-01 | 鞍钢集团工程技术有限公司 | Process method and device for forcibly recovering diffused gas of blast furnace |
| CN110004258A (en) * | 2019-04-02 | 2019-07-12 | 北京首钢国际工程技术有限公司 | A kind of device recycling blast furnace top pressure-equalizing bleeding coal gas |
| 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 |
| CN110479594A (en) * | 2019-08-07 | 2019-11-22 | 李震 | A kind of separation system and method for Machine-made Sand dust |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20170618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |