CN2124916U - Pulverulent coal gasification burner for blast furnace wind inlet spray - Google Patents
Pulverulent coal gasification burner for blast furnace wind inlet spray Download PDFInfo
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- CN2124916U CN2124916U CN92205037U CN92205037U CN2124916U CN 2124916 U CN2124916 U CN 2124916U CN 92205037 U CN92205037 U CN 92205037U CN 92205037 U CN92205037 U CN 92205037U CN 2124916 U CN2124916 U CN 2124916U
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- burner
- coal gasification
- gasification
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses a powdery coal gasification burner for blowing a blast furnace tuyere, belonging to a powdery coal gasification burner for a blast furnace tuyere or a straight blowpipe, comprising a spiral flow type powdery coal burner, wherein, the spiral flow strength of the spiral flow type powdery coal burner is greater than 1.2; a powdery coal gasification and burning device is a vertical type cylinder; the secondary and the tertiary air and the hot steam tangential inlets and a double bell type ash generating system are arranged on the powdery coal gasification and burning device; high temperature crude coal gas outlet is intersected with the vertical type cylinder along an axial line; the outlet of the vertical type cylinder is communicated with the blast furnace tuyere or the straight blowpipe to replace a blast furnace blowing powdery coal system. The utility model has the advantages of simple structure, less volume of a blast furnace hot blast furnace, less consumption of blast furnace mixed coal gas and coke and low cost, and is a beneficial measure for energy saving and consumption reducing.
Description
The invention belongs to the coal gasification combustion unit that is used for blast furnace.
In decades, people are managing to improve the blast-furnace hot-air temperature to boost productivity always, improve blast furnace pulverized coal injection amount to save more coke, particularly China of coking coal shortage.Existing blast-furnace hot-air temperature is about 1000-1250 ℃, improves very difficulty again.The hot blast temperature of domestic blast furnace is mostly about 1050 ℃.The highest is the Baoshan Iron and Steel Company head factory, and hot blast temperature is about 1250 ℃.Carry out pulverized coal injection with oxygen coal gun or coal rifle in addition, the winding-up amount is limited, present domestic level, the winding-up quantity not sufficient 150kg/THM of maximum stable, external advanced blast furnace blowing amount is about 200kg/THM, rethinks raising and makes process stabilization very difficult, and oxygen coal gun or coal rifle life-span are short in addition.In this case, developed fine coal ash disposal gasification combustor, this burner can partly replace hotblast stove, and can replace blowing device.
The equipment of realizing pulverized coal friring roughly can be divided into two classes: a class is that fine coal and AIR MIXTURES take fire at device interior, and this class is called burner; Another kind of is that fine coal and AIR MIXTURES auto levelizer outside just take fire, and this class is called burner (velocity of discharge is lower) or spray gun (velocity of discharge is higher).Though the fine coal spray gun is used widely on blast furnace at present, because 1. the life-span lacks; 2. flyash all enters blast furnace and brings problem to slag making; 3. the cold fine coal of too much winding-up can make the wind coal mixtures temperature that enters the air port reduce, thereby productivity reduces; 4. too much pulverized coal injection also can influence the direct motion of blast furnace.So attempting to improve the winding-up amount with oxygen coal gun or coal rifle merely is unscientific to save coke.Powdered coal burner has been widely used in station boiler, various process furnace, forging furnace, but also is not applied on blast furnace.Powdered coal burner roughly can be divided into once-through type and cyclone-type, in the once-through type burner, often all adopts bluff body or other method such as high speed difference etc. to produce the recirculating zone, with stable burning, and the cyclone-type burner then utilizes the direct rotation of fine coal and air mixture to produce the recirculating zone, with stable burning.In turbulent burner, there is a class to be called fine coal half gasification combustor, it is made up of two cylinders, a tube is a vaporizer, and another tube is the ash disposal tube, but owing to the interface between two easily stops up, the outlet pipe life-span of burner ash disposal tube can't solve, so can not be applied to industrial.In turbulent burner, also have a class to be called liquid deslagging powdered coal burner, can't be used for high-pressure system but reach for some technological problems, also fail to be used for blast furnace.
Spray gun work-ing life of blast furnace blowing fine coal is low before the objective of the invention is to overcome, the winding-up amount is less and the fine coal ash content is brought blast furnace into and increased the quantity of slag and influence shortcoming such as direct motion, adopt monotubular formula fine coal ash disposal gasification combustor, coal gasification, burning are generated contain CO30-50%, H
2The reductibility combustion gas of 10-15%, its gas outlet temperature reach more than 1300 ℃, therefore, use this burner both can provide reducing gas, can partly substitute hotblast stove again, can also replace original blowing device.Here the implication of the alternative hotblast stove of part is: can save coke to greatest extent after using this gasification combustor, but the small part coke is still necessary, it is as the skeleton in the blast furnace stock column, and this part coke must provide hot blast to burn by hotblast stove.
The device that to the effect that utilizes the coal gasification burner as blast furnace ironmaking use fine coal of the present invention utilizes the combustion gas of gasification combustor outlet (to contain CO30-50%, H
210-15%) as reducing gas, and utilize the heat content of the heat content instead of part hot blast of gas outlet.The structure of coal gasification burner is seen accompanying drawing 1, and it comprises that swirler (1), vaporizer (2), burning chamber (3), secondary air and hot steam inlet (4), tertiary air and steam-in (5), burner high temperature gas outlet, two clock-type go out ash system (7).Wherein secondary air and vapour inlet (5) and tertiary air and steam-in (6) are tangential inlet, and the medullary ray of gas outlet (6) and the medullary ray of combustion gasification cylinder intersect.Gasification combustor is a round shape, and liner is a refractory materials.Also comprise hotblast stove (8), blast furnace (9) among Fig. 1.Burner outlet can be provided with single or multiple, to adapt to blast-furnace tuyere.
Whirlwind-type gasification combustor of the present invention comprises the fine coal transfer lime, and swirler comprises turning vane, swirl vane, tangential vane or tangentially enters vortex device of gas and pulverized coal mixture etc.
It is 200 orders that the present invention adopts fine coal, and primary air accounts for 20% of theoretical combustion air, carries fine coal and enters vaporizer by swirler, because strong cyclonic action produces the recirculating zone on vaporizer top, helps igniting and stable burning.In seed region, the volatile matter of fine coal decomposes rapidly, at this moment, accounts for the air of the 10-20% of theoretical combustion air by secondary air inlet input, is beneficial to the further burning heat release of fine coal, and the importation hot steam is to improve the hydrogen (H in the products of combustion simultaneously
2) content, and have the temperature action of controlling and regulating vaporizer, make it in 900-1200 ℃ of scope.Behind the pulverized coal friring, utilize swirling eddy that swirl flow combustion produces with the ash content that still contains portion C more than 50% from, make it to fall into burning chamber, import about 20% air by the tertiary air inlet simultaneously, fine coal that further burning does not burn or the ash content that still contains fixed carbon, in addition, from an amount of steam of tertiary air inlet input, can further increase the H in the products of combustion
2Amount also reduces the temperature at ash output hole place.Fine coal has become the ash of C content very low (about 1%) after vaporizer, burning chamber, fall into two clock-type ash disposal systems, discharges at last, and the ash discharge temperature is about below 700 ℃.For the high pressure blast furnace, two clock-type dust removing systems adopt ball face sealing, and the raw gas that obtains by fine coal and air, hot steam mixture burns contains CO30-50%, H
210-15%, its temperature greater than 1300 ℃ (because the gasification, and combustion product still has a segment distance from the vaporizer to the burner outlet, in this segment distance, burning is still being carried out, so temperature out is raised to more than 1300 ℃ by 1200 ℃ of vaporizer) be higher than raw gas about 1300 ℃ in burner outlet is blown into blast-furnace tuyere or belly pipe.CO in the raw gas and H
2Content can regulate by the ratio of regulating fine coal, air and hot steam, to adapt to the needs of blast furnace smelting process.Raw gas enters high furnace interior, substitutes coke as reducing gas.
Coal gasification burner of the present invention adopts swirling number greater than 1.2 strong swirler, coal gasification and burnt zone are in the two sections of same vertical cylinder, which is provided with the tangential inlet of secondary air and hot steam, the tangential inlet of tertiary air and hot steam, the bottom is provided with two clock-types and goes out ash system, and the high-temperature fuel gas outlet is intersected with cylinder axis, along the more than one gas outlet of the circumference of cylinder, adapt with blast-furnace tuyere, be connected with blast-furnace tuyere or belly pipe.
The present invention is according to the capacity and the iron-smelting process requirement of blast furnace, determines the temperature of raw gas composition, rough coal tolerance and raw gas that the gasification, and combustion intensity of fine coal is supplied with.And then the scantlings of the structure of definite coal gasification burner.Comprise swirler, vaporizer, burning chamber and the size that goes out ash system.The sectional area of its secondary air and hot steam inlet, tertiary air and hot steam inlet and the outlet of high temperature rough gas determines that according to air demand, free air delivery import and velocity of discharge are controlled at 30-100m/s(and are velocity of discharge at a high speed).
The quantity of coal gasification burner of the present invention can be determined according to blast-furnace tuyere quantity, the gasification combustor identical with inlet number can be set, the gasification combustor of a big ability also can several air ports be set, 1～30 coal gasification burner generally can be set.
Coal gasification burner of the present invention can alternate coke amount and can the alternate hot blast rate can be determined according to thermal equilibrium and material balance and iron manufacturing process physical and chemical principle.
Adopt the raw gas of coal gasification burner outlet to feed the reductive agent of blast furnace as ironmaking, this moment coke main effect only as the skeleton of blast furnace stock column, so it is minimum that the coke requirement can be reduced to, this moment, the capacity of hotblast stove also can reduce greatly, the effect of hot blast only is and the coke exothermic heat of reaction to promote slag iron to separate.
Coal gasification burner of the present invention is determined its gasification, and combustion intensity, is supplied with rough coal tolerance, raw gas composition and temperature thereof according to the capacity and the smelting technology requirement of blast furnace.The scantlings of the structure of coal gasification burner is to require and the coal gasification combustioncharacteristics is determined according to the state in blast-furnace tuyere district, blast furnace technology.Coal amount and the cross section gasification of fine coal and the cylinder size that intensity of combustion is determined gasification and combustion chamber by supply.
For coal amount is the burner of 500kg/h, excess air coefficient n=0.8, the hot steam amount is 50kg/h, the internal diameter of its gasification combustion chamber is 0.35m, external diameter is 0.5m, highly be 2.0m, the area of the inlet of its secondary air and steam, tertiary air and steam is that 30-40m/s determines by gas velocity, combustion gas (raw gas) outlet size is that 60-100m/s determines by combustion gas (raw gas) velocity of discharge, height is determined according to gasification of fine coal volume and intensity of combustion, and can be designed to one or more outlets.
For coal amount is the burner of 5000kg/h, excess air coefficient n=0.8, and the hot steam amount is 500kg/h, and the internal diameter of its gasification combustion chamber is 1.0m, and external diameter is 1.2m, highly is 3.5m, and its gas inlet and gas outlet cross section are determined according to gas velocity.
The ash disposal system of coal gasification burner of the present invention requires to determine according to the ability of burner, the pressure and the blast furnace technology in blast-furnace tuyere district.
Steam import volume of the present invention is to determine according to the gas outlet temperature of coal amount, coefficient of excess air, requirement etc.When coal amount is 500kg/h, coefficient of excess air n=0.8, temperature is that 200 ℃ hot steam amount is 50kg/h, can obtain the CO of about 30-50% and the H of 10-15%
2Raw gas, its temperature out is 1300 ℃.
Technical characterstic of the present invention is the coal gasification burner to be produced temperature introduce blast-furnace tuyere up to the raw gas more than 1300 ℃, is equivalent to improve the blast-furnace hot-air temperature.Raw gas contains the CO of 30-50% and the H of 10-15%
2, behind the introducing blast furnace, can reduce the coke consumption greatly, thereby reduce blast furnace coke ratio greatly.The present invention introduces heat steam to the coal gasification combustion chamber, can increase the hydrogen content in the raw gas, accelerate the reduction rate of iron ore, improve the productivity of blast furnace, and can control and regulate the burner temperature inside, to obtain meeting the wind-warm syndrome of blast furnace technology requirement.The life-span that simultaneously can also improve gasification combustor.The general life-span is more than 1.5 years.
The present invention adopts eddy flow to remove gray technology, and eddy flow ash disposal rate reaches more than 50%, and it is less to enter the ash content that the coal gas of blast furnace brings into, thereby has alleviated the slag making burden of blast furnace and the cleaning of blast furnace gas.
Claims (4)
1, the coal gasification burner that is used for the blast-furnace tuyere winding-up, comprise swirler, powdered coal burner, it is characterized in that swirler is strong eddy flow (swirling number is greater than a 1.2) device, coal gasification and the vertical cylinder that burns, which is provided with the tangential inlet of entry and the tertiary air and the hot steam of secondary air and hot steam, two clock-types go out ash system.High-temperature fuel gas outlet and vertical cylinder axes intersect are arranged more than one gas outlet along cylinder week, and to adapt with blast-furnace tuyere, its outlet communicates with blast-furnace tuyere or belly pipe.
2, according to the described coal gasification burner of claim 1, it is characterized in that determining to gasify and the cylinder size of burning chamber by gasification of the cross section of coal amount and fine coal and intensity of combustion, when coal amount is 500kg/h, coefficient of excess air n=0.8, the hot steam amount is 50kg/h, its barrel bore is 0.35m, external diameter is 0.5m, height is 2.0m, secondary air and steam, tertiary air and steam-in and raw gas outlet are according to air demand and free air delivery, and the control import should be 30-40m/s mutually with velocity of discharge and 60-100m/s determines.Height is determined according to gasification of fine coal volume and intensity of combustion.
3, according to claim 1 and 2 described coal gasification burners, it is characterized in that coal amount is 500kg/h, its barrel bore is 1.0m, and external diameter is 1.2m, and height is 3.5m.
4,, it is characterized in that a blast furnace can have 1-30 coal gasification burner according to the described coal gasification burner of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92205037U CN2124916U (en) | 1992-03-25 | 1992-03-25 | Pulverulent coal gasification burner for blast furnace wind inlet spray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92205037U CN2124916U (en) | 1992-03-25 | 1992-03-25 | Pulverulent coal gasification burner for blast furnace wind inlet spray |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2124916U true CN2124916U (en) | 1992-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92205037U Granted CN2124916U (en) | 1992-03-25 | 1992-03-25 | Pulverulent coal gasification burner for blast furnace wind inlet spray |
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| CN (1) | CN2124916U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328434B (en) * | 2008-07-17 | 2011-06-22 | 中国科学技术大学 | Dry coal powder airflow bed gasification furnace |
| CN102344834A (en) * | 2010-07-29 | 2012-02-08 | 气体产品与化学公司 | Method for gasification and a gasifier |
| CN103952186A (en) * | 2014-04-30 | 2014-07-30 | 浙江大学 | Downdraft gasifier with tar degrading function |
| CN108753371A (en) * | 2018-08-08 | 2018-11-06 | 安徽科达洁能股份有限公司 | A kind of high-temperature burner |
| CN110272763A (en) * | 2019-07-23 | 2019-09-24 | 上海万禾新能源开发有限公司 | Cyclone biomass gasifying furnace |
-
1992
- 1992-03-25 CN CN92205037U patent/CN2124916U/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328434B (en) * | 2008-07-17 | 2011-06-22 | 中国科学技术大学 | Dry coal powder airflow bed gasification furnace |
| CN102344834A (en) * | 2010-07-29 | 2012-02-08 | 气体产品与化学公司 | Method for gasification and a gasifier |
| TWI454641B (en) * | 2010-07-29 | 2014-10-01 | Air Prod & Chem | Method for gasification and a gasifier |
| CN103952186A (en) * | 2014-04-30 | 2014-07-30 | 浙江大学 | Downdraft gasifier with tar degrading function |
| CN103952186B (en) * | 2014-04-30 | 2015-07-29 | 浙江大学 | There is the down-draft type gasifying furnace of tar degradation function |
| CN108753371A (en) * | 2018-08-08 | 2018-11-06 | 安徽科达洁能股份有限公司 | A kind of high-temperature burner |
| CN108753371B (en) * | 2018-08-08 | 2024-03-08 | 安徽科达洁能股份有限公司 | High-temperature combustor |
| CN110272763A (en) * | 2019-07-23 | 2019-09-24 | 上海万禾新能源开发有限公司 | Cyclone biomass gasifying furnace |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |