CN1323260C - Combustible powder swirl-flow combined burner - Google Patents

Combustible powder swirl-flow combined burner Download PDF

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Publication number
CN1323260C
CN1323260C CNB200510079701XA CN200510079701A CN1323260C CN 1323260 C CN1323260 C CN 1323260C CN B200510079701X A CNB200510079701X A CN B200510079701XA CN 200510079701 A CN200510079701 A CN 200510079701A CN 1323260 C CN1323260 C CN 1323260C
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burner
pipe
airduct
combustible powder
tube cell
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CN1702375A (en
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王明坤
郭进军
刘孝弟
王军
李兵科
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Changzheng Engineering Co Ltd
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Beijing Aerospace Propulsion Institute
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Abstract

The present invention relates to a combustible powder rotational flow combined burner which has the structure that a primary air pipe is arranged at the center of a casing body of the burner, the center of the primary air pipe is provided with an ignition device, and a flame monitoring device is arranged on the end cover of the primary air pipe; a gas inlet pipeline and a gasifying agent inlet pipeline which are combined with each other are connected with the primary air pipe, and two kinds of gas are switched through a valve; a secondary powder pipe is arranged outside the primary air pipe, and the secondary powder pipe is composed of a straight pipe segment and an elbow piece; combustible powder enters the secondary powder pipe from the inlet of the elbow piece, the primary air pipe is axially inserted along the burner from the elbow piece of the secondary powder pipe, and the outlet of the secondary powder pipe is additionally provided with a combustible powder rotational flow device; a tertiary air channel is arranged outside the secondary powder pipe, the tertiary air channel is formed in such a manner that a cooling clamp at the outmost layer of the burner is sheathed at the outer side of the secondary powder pipe, the tertiary air channel is connected with an oxidant inlet pipe, and the end contraction segment of the tertiary air channel is provided with an oxidant rotational flow device. The present invention has the advantages of short length of flame of the burner, stove body volume saving, long service life of the burner, high combustion efficiency and high gasification efficiency.

Description

Combustible powder swirl-flow combined burner
Affiliated technical field
The present invention relates to a kind of burner, particularly a kind of what be used for gasification furnace and heating furnace is the swirl-flow combined burner of fuel with the combustible powder.
Background technology
In the existing Coal Gasification Technology, with the technology comparative maturity of Texaco and Shell, a lot of at home producers are applied, and both have their own characteristics each aspect burner design.Wherein the Texaco gasification furnace burner is fuel with the water-coal-slurry, and this burner is divided into three layers of passage, and the central passage medium is an oxygen, and second layer channel media is a water-coal-slurry, and the outermost layer channel media still is an oxygen.The burner of this structure is very ripe, but the deficiency of self is also arranged: (1) water-coal-slurry has very strong wearing and tearing to shower nozzle, therefore must often change wearing terrain (the wearing terrain life-span was generally 30～60 days); (2) water-coal-slurry and oxygen adopt straight flow structure to make combustion flame longer, and corresponding body of heater length also increases; (3) burner uses the coil pipe cooling structure, very easily causes damage when dismounting; (4) the burner sparking mode adopts preheat burner to refractory brick heating in the body of heater, and fire box temperature is switched after reaching the ignition temperature of water-coal-slurry, to water-coal-slurry igniting, sparking mode complex operation; (5) this structural requirement coal can be made into high concentration, high stability, the water-coal-slurry that rheological behavior is good, require coal to wear into the coal slurry that distributes by certain particle size, in order to improve the characteristic of water-coal-slurry, also to add certain quantity of additive, even so, still have the part coal to be not suitable for making water-coal-slurry, the scope of application is limited to.
Shell coal dust gasification equipment is the dry coal powder with fuel, adopt high pressure nitrogen to be conveyed into gasification furnace, the scope of application to coal is wide, granularity, cohesiveness, sulfur content, oxygen content and the ash content of coal to coal are insensitive, its structure is uniformly distributed along the circumference in the stove middle and lower part by the quadruplet burner, the quadruplet burner forms flames in opposing direction in stove, synthesis gas is from the discharging of gasification furnace upper end, and slag discharges from the lower end.The deficiency of Shell burner is: (1) though simple in structure, adopt straight flow structure, flame is longer, itself is not with igniter, needs add in addition the igniting device and light a fire in gasification furnace; (2) mixed process of Shell burner coal dust and oxygen mainly realizes that by the structure that liquidates of four in the stove do not add cyclone structure, single burner can't work independently, so the Shell burner scope of application is little, only is applicable to the liquidate body of heater of structure of flame.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcomes the deficiencies in the prior art, provides a kind of atomizing effect good, and long service life, compact conformation is simple, is easy to realize that flame is sturdy, efficiency of combustion height, the combustible powder swirl-flow combined burner that the scope of application is extensive.
Technical scheme of the present invention: combustible powder swirl-flow combined burner is characterized in that: be provided with one time airduct at the center of burner shell, one time the airduct center is placed with igniter, arranges flame monitor on the airduct end cap; The fuel gas inlet pipeline connects together with the gasifying agent inlet pipeline and is connected with an airduct, and two kinds of gases switch by valve; One time airduct has the secondary tube cell outward, and the secondary tube cell is made up of straight length and elbow.Combustible powder enters from the elbow import, and the bending radius of elbow is 20～60 times of straight length diameter, and one time airduct axially inserts along burner from the elbow of secondary tube cell, and secondary tube cell exit position installs the combustible powder swirl-flow device additional; The secondary tube cell has the tertiary air road outward, and the tertiary air road is enclosed within the secondary tube cell outside by the outermost cooling jacket of burner and forms, and the tertiary air road is provided with the oxidant inlet pipe, and the terminal contraction section in tertiary air road is furnished with the oxidant swirl-flow devices.Cooling jacket constitutes by adding a laminated plank in the toroidal cavity.
Principle of the present invention: the high-energy ignition rod is inserted at an airduct center of burner, flow through fuel gas in an airduct during igniting, an amount of oxidant is supplied in the tertiary air road simultaneously, fuel gas is after fire rod is lighted, open combustible powder charging valve, the supply of oxidant increases gradually, with fuel gas flame ignition combustible powder, stop the fuel gas air feed then gradually, one time the airduct medium switches to gasifying agent.Combustible powder delivers into elbow by assist gas, the elbow bending radius is 20～50 times of straight length diameter of joining, the elbow angle of bend is 10 °～60 °, choose bigger bending radius and be in order to guarantee the centrifugal force that combustible powder is subjected to less, otherwise can cause burner outlet combustible powder uniformity inconsistent.The combustible powder import adopts straight tube can cause structure loaded down with trivial details.Secondary tube cell exit can install the combustible powder swirl-flow device additional, and powder is carried out eddy flow.Powder carries out premix with the gasifying agent of an airduct ejection after secondary tube cell ejection, gasifying agent can carry out preheating and dilution to combustible powder, simultaneously powder is quickened.The medium in tertiary air road is an oxidant, and the air channel end is provided with the oxidant swirl-flow devices, and oxidant sprays behind eddy flow, run into the combustible powder and gasifying agent of mixing after, the three mixes rapidly.It is in order to accelerate mixing velocity that powder and oxidant all adopt the cyclone mode ejection, and favourable to the tissue burning, the while combustion flame shortens chap.Flame is very strong to the radiation of burner.Airduct and secondary tube cell can be realized cooling protection effect to passage and shower nozzle by gasifying agent when the burner operate as normal.Fire rod can be withdrawn from after lighting combustible powder, to avoid the damage of hyperthermia radiation to igniter.Combustor external adds cooling jacket protection, and the medium in the chuck can be water or other cooling mediums.Chuck is divided into two-layer by clamping plate, medium is entered by skin, is flowed out by internal layer after circulating.
The present invention's advantage compared with prior art is:
(1) gasifying agent carries out the premix acceleration to combustible powder, is beneficial to combustible powder and mixes with oxidant, has avoided the wearing and tearing that direct acceleration causes transfer pipeline to powder.
(2) gasifying agent and fuel gas utilize same pipeline to carry, and have not only simplified burner structure, have avoided simultaneously airduct and secondary tube cell are designed cooling structure in addition.
(3) rationally choosing of elbow bending radius simplifies the structure, and avoids burner outlet combustible powder uniformity inconsistent.
(4) realized center fire, igniter can be withdrawn from after igniting, and dismounting is flexible, and igniter prolongs service life.
(5) outlet of oxidant and combustible powder all is provided with swirl-flow devices, accelerates the two mixing velocity, forms short and thick flame during burning, reduces body of heater length.
(6) the heat absorption capacity protection burner that cooling medium is very strong is not ablated, has prolonged the service life of burner.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
As shown in Figure 1, fire rod 1, airduct 2, straight tube 4, cooling jacket 12 and combustible powder swirl-flow device 10, an oxidant swirl-flow devices 13 are placed with one heart.The center of burner shell is provided with and arranges flame monitor 21 on 1, airduct 2 end cap of insertion point, 2, airduct 2 centers of airduct lighted torch; Fuel gas pipeline and gasifying agent pipeline also insert a pipeline, are connected with import 20, and import 20 is connected with an airduct 2, and fuel gas and gasifying agent switch by valve; Outside the airduct 2 the secondary tube cell is arranged, the secondary tube cell is made up of straight length 4 and elbow 3, combustible powder enters from elbow 3 imports, the bending radius of elbow 3 is 20～60 times of straight length diameter, the elbow angle of bend is 10 °～60 °, airduct 2 axially inserts along burner from elbow 3, and airduct 2 outer wall and secondary tube cell inwall form secondary powder road 18, and secondary tube cell exit position installs combustible powder swirl-flow device 10 additional; The secondary tube cell has tertiary air road 15 outward, and tertiary air road 15 is formed by straight tube 4 outsides that the outermost cooling jacket 12 of burner is enclosed within the secondary tube cell, and tertiary air road 15 terminal contraction sections are furnished with oxidant swirl-flow devices 13; Cooling jacket 12 cooling jackets are made of a toroidal cavity interpolation one laminated plank 9, and with cover plate 6, cover plate 7 welding forms outer cooling duct 11 and internal layer cooling duct 14, cover plate 5 is connected with cooling jacket 12 inner layer cylinders and straight tube 4 outer walls; Cooling medium inlet pipeline 8 is connected with cooling jacket 12 outer walls, and cooling medium flows into outer layer channel 11, changes internal layer passage 14 over to from cooling jacket 12 bottoms at last, is flowed out by outlet 16; Cooling medium outlet conduit 16 is connected with clamping plate 9, the straight tube 4 of airduct 2, secondary tube cell and cooling jacket 12 be elongation successively in axial direction, and reduce at burner outlet place sectional area, keep the conical outlet structure, and the contraction section spout length of secondary tube cell straight tube slightly is longer than airduct 2 outlets, and cooling jacket 12 contraction section spout length slightly are longer than 4 outlets of secondary tube cell straight tube.
Flame monitoring apparatus 21 can pass gas medium, induction flame region high temperature.Combustible powder swirl-flow device 10 and oxidant swirl-flow devices 13 are usual means, and it evenly is welded on the tube wall along circumference by sector bending back and is made.One time airduct 1, straight length 4, elbow 3, swirl vane and cooling jacket 12 heads all adopt high temperature resistant, the anti-alloy material that washes away, for example HAYNES 188 alloys.Fire rod 1 and flame monitoring apparatus 21 can outsourcings.
The course of work of the present invention: fuel gas enters from import 20, by airduct 19 ejections, the simultaneous oxidation agent enters from oxidant inlet 17, sprays behind swirl-flow devices 13 eddy flows by tertiary air road 15, and the two mixes the back and is lighted by igniter 1 in 15 exits, tertiary air road.After fuel gas was lighted, combustible powder entered from import 3, increased oxidizer flow rate simultaneously, and combustible powder sprays behind swirl-flow devices 10 eddy flows by secondary powder road 18, mixed the back with oxidant by the fuel gas flame ignition.During operate as normal, igniter 1 can be withdrawn from, and reduces the fuel gas flow gradually by valve control, opens the gasifying agent valve simultaneously and increases the gasifying agent flow gradually.Gasifying agent is entered by import 20, and replacing fuel gas is by an airduct 19.Entire work process, cooling jacket 12 have cooling medium to pass through all the time, with the protection burner.During the burner completion of combustion, stop the combustible powder charging, stop oxidant feed at last.

Claims (3)

1, combustible powder swirl-flow combined burner is characterized in that: be provided with one time airduct at the center of burner shell, one time igniter is inserted at the airduct center, arranges flame monitoring apparatus on the airduct end cap; The fuel gas inlet pipeline is connected with an airduct with the gasifying agent inlet pipeline and after connecing, and both switch by valve; One time airduct has the secondary tube cell outward, and the secondary tube cell is welded by straight length and elbow, and combustible powder enters from the elbow import, and one time airduct axially inserts along burner from the elbow of secondary tube cell, and secondary tube cell exit position installs the combustible powder swirl-flow device additional; The secondary tube cell has the tertiary air road outward, and the tertiary air road is enclosed within the secondary tube cell outside by the outermost cooling jacket of burner and forms, and the tertiary air road is connected with the oxidant inlet pipe, and terminal contraction section has the oxidant swirl-flow devices.
2, combustible powder swirl-flow combined burner according to claim 1 is characterized in that: described elbow bending radius is 20～60 times of straight length diameter, and angle of bend is 10 °～60 °.
3, combustible powder swirl-flow combined burner according to claim 1 is characterized in that: described cooling jacket constitutes by adding a laminated plank in the toroidal cavity.
CNB200510079701XA 2005-06-24 2005-06-24 Combustible powder swirl-flow combined burner Active CN1323260C (en)

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CN1323260C true CN1323260C (en) 2007-06-27

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007040890A1 (en) * 2007-08-29 2009-03-05 Siemens Ag Coal dust combination burner with integrated pilot burner
US8070483B2 (en) * 2007-11-28 2011-12-06 Shell Oil Company Burner with atomizer
CN102506441B (en) * 2011-11-07 2014-01-08 中科为宇（北京）科技发展公司 Oxygen-enriched combustion method and device
CN103672880A (en) * 2013-09-16 2014-03-26 北京神雾环境能源科技集团股份有限公司 Powder burner
CN103805288A (en) * 2014-03-13 2014-05-21 杜建吉 High-efficiency pulverized coal burner for dried pulverized coal fluidized bed gasification furnace
CN104611065B (en) * 2015-01-14 2017-02-22 清华大学 Double-swirling pulverized coal spray nozzle for dry powder gasifier
CN104791784A (en) * 2015-03-03 2015-07-22 杭州福鼎节能科技服务有限公司 Coal water slurry pelletizing and gunite device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60245715A (en) * 1984-05-18 1985-12-05 Nippon Steel Corp Device for controlling reaction in converter
CN1035173A (en) * 1988-01-12 1989-08-30 三菱重工业株式会社 With the solid-fuelled method of fluidized bed combustion
CN2143757Y (en) * 1993-02-09 1993-10-13 石家庄钢铁厂 Coal-oxygen jet gun of intensified electric furnace metallurgy
CN2428747Y (en) * 2000-06-30 2001-05-02 钢铁研究总院 Immersion-type coal-oxygen spray-gun
CN2800078Y (en) * 2005-06-24 2006-07-26 北京航天动力研究所 Vortex combined burner with flammable powder as fuel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60245715A (en) * 1984-05-18 1985-12-05 Nippon Steel Corp Device for controlling reaction in converter
CN1035173A (en) * 1988-01-12 1989-08-30 三菱重工业株式会社 With the solid-fuelled method of fluidized bed combustion
CN2143757Y (en) * 1993-02-09 1993-10-13 石家庄钢铁厂 Coal-oxygen jet gun of intensified electric furnace metallurgy
CN2428747Y (en) * 2000-06-30 2001-05-02 钢铁研究总院 Immersion-type coal-oxygen spray-gun
CN2800078Y (en) * 2005-06-24 2006-07-26 北京航天动力研究所 Vortex combined burner with flammable powder as fuel

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