CN101482265B - Low NOX dry ash extraction coal powder burner - Google Patents

Low NOX dry ash extraction coal powder burner Download PDF

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Publication number
CN101482265B
CN101482265B CN2009100465489A CN200910046548A CN101482265B CN 101482265 B CN101482265 B CN 101482265B CN 2009100465489 A CN2009100465489 A CN 2009100465489A CN 200910046548 A CN200910046548 A CN 200910046548A CN 101482265 B CN101482265 B CN 101482265B
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CN
China
Prior art keywords
wind
cap
adjusting screw
coal
burner
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Application number
CN2009100465489A
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Chinese (zh)
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CN101482265A (en
Inventor
郑雯平
潘玉明
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上海题桥纺织染纱有限公司
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Priority to CN2009100465489A priority Critical patent/CN101482265B/en
Publication of CN101482265A publication Critical patent/CN101482265A/en
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Publication of CN101482265B publication Critical patent/CN101482265B/en

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Abstract

The present invention relates to a low NOX solid slagging pulverized coal burner, which comprises an adjusting handle, a once wind/pulverized coal pipe, an adjusting screw bushing, an adjusting screw, an axial-flow generator, a nozzle cone, a burner housing, a high-temperature flame retardant coating, a base and a back-end shield, and is characterized in that a secondary wind steady flame rotational flow guider and a secondary wind rotational flow guider are installed outside the center of the back-end shield in turn, the secondary wind steady flame rotational flow guider and the secondary wind rotational flow guider are connected with a secondary air chamber installed outside the back-end shield, a thrice air curtain thrust jet for crust block prevention is installed between the back-end shield and the high-temperature flame retardant coating, and the thrice air curtain thrust jet for crust block prevention is connected with a thrice air chamber for crust block prevention installed outside the back-end shield. The burner has the advantages of being capable of burning coals with low ash fusion point and burning coals with high ash fusion point.

Description

A kind of low-NOx solid attitude deslagging coal burner

Technical field

The present invention relates to a kind of low NO XThe dry ash extraction coal burner, be applicable to 2-35 ton steam, hot-water boiler, stove, forging, steel-making, road and bridge blending station and every profession and trade fields such as the heating of cold aggregate, station boiler igniting produce burner to the heat energy demand, belong to the coal burner technical field.

Background technology

Grate firing boiler is the type of furnace of present Industrial Boiler extensive use, is made up of critical pieces such as pressure-containing parts, traveling-grate stokers, and bunker coal is layer combustion on fire grate, during burning and Air mixing insufficient, cause burning not thoroughly, low, the q of burnout rate 4Heat loss is big, and smoke evacuation contains NOx, SO 2, the dust concentration height, contaminated environment.For addressing these problems, the applicant once was called " low NOx axial eddy pulverized-coal burner " utility model patent in the name of application on 02 12nd, 2007, publication number is CN201014436, the name of application on June 11st, 2007 is called the patent of invention of " low NOx multi-tube axial eddy pulverized-coal burner ", application number is 200710110815.5, and the shortcoming of these two kinds of burners is:

1, owing to be the combustion system of a wind, coal dust firing is abundant not enough;

2, because the ignition temperature of burner is very high, thereby influence the service life of burner.

The applicant is called the utility model patent of " low NOx liquid state slag-off double-eddy flow coal-powder combustor " again in the name of application on July 28th, 2008, application number is " 200820151316.0 ", it is external that the secondary air chamber of this burner is located at combustion chamber shell, in secondary air chamber, be provided with the eddy flow conduit, this wind is axial introducing, and secondary wind is tangential introducing, and ignition temperature can reach 1450 ℃-1600 ℃, therefore is the liquid deslagging after the burning, its shortcoming is the coal of low ash smelting point of can only burning.

Summary of the invention

The coal that the purpose of this invention is to provide a kind of both incendivities low ash smelting point, the low NO of the high-ash-fusion coal that can burn again XThe dry ash extraction coal burner.

For realizing above purpose, technical scheme of the present invention provides a kind of low NO XThe dry ash extraction coal burner, comprise adjusting handle, a wind/coal pipe, the adjusting screw(rod) sleeve pipe, adjusting screw(rod), the axial flow generator, nozzle hole cone, burner shell, the high-temperature flame-proof layer, base and rear end cap, burner shell is located on the base, the high-temperature flame-proof layer is located at the burner shell inwall, rear end at burner shell is provided with rear end cap, the centre bore of rear end cap is connected with wind/coal pipe one end, the adjusting screw(rod) that has an adjusting screw(rod) sleeve pipe is located in the middle of wind/coal pipe, pass at adjusting screw(rod) on the outer end of a wind/coal pipe and be provided with adjusting handle, be provided with nozzle hole cone in adjusting screw(rod) the inner, on the adjusting screw(rod) in the nozzle hole cone outside, be provided with the axial flow generator, on rear end cap, be respectively equipped with flame-observing hole, flame detector and automatic ignition device, it is characterized in that, outside the rear end cap center, be provided with secondary wind steady flame eddy flow guider and secondary wind eddy flow guider successively, the steady flame eddy flow of secondary wind guider is connected with the secondary wind eddy flow guider secondary air chamber outer with being located at rear end cap, be provided with anti-crust block tertiary air curtain jet pipe between rear end cap and high-temperature flame-proof layer, the anti-crust block tertiary air curtain jet pipe tertiary chamber outer with being located at rear end cap is connected.

The present invention is installed in secondary air chamber at the rear portion of burner; make wind and secondary wind coaxial; the eddy flow direction is consistent with axial flow generator eddy flow direction; it is more even that combustible is mixed; after comburant elder generation and the wind mixed combustion; again with can regulate the mixed combustion of secondary wind; divide a plurality of sections to burn at many levels; sufficient combustion; the burn-off rate height; the utility model increases anti-crust block tertiary air curtain jet pipe between rear end cap and high-temperature flame-proof layer; the high speed winds (60m/s) that anti-crust block tertiary air curtain jet pipe blows out forms one deck air curtain at high-temperature flame-proof layer inwall; can avoid the adherent bonding coking of ash content under high-temp combustion; slagging scorification simultaneously effectively protection burner shell avoids temperature too high and damage the proportioning that can replenish air simultaneously under the situation of high load capacity, supplemental oxygen; make burning more abundant; the present invention is owing to designed anti-crust block tertiary air curtain jet pipe core texture with solid-state mode deslagging, thus the coal of the low ash smelting point that can burn, the coal of the high ash melting point that can burn again.

Advantage of the present invention is both coal of incendivity low ash smelting point, can burn the coal of high ash melting point again.

Description of drawings

Fig. 1 is a kind of low NO XDry ash extraction coal burner structural representation;

Fig. 2 is low NO XDry ash extraction coal burner I-I cutaway view;

Fig. 3 is low NO XDry ash extraction coal burner A-A cutaway view.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.

Embodiment

As shown in Figure 1, 2, 3, be a kind of low NO XDry ash extraction coal burner structural representation, described low NO XThe dry ash extraction coal burner is by adjusting handle 1, a wind/coal pipe 2, adjusting screw(rod) sleeve pipe 3, adjusting screw(rod) 4, axial flow generator 5, nozzle hole cone 6, nozzle diffuser 7, anti-crust block tertiary chamber 8, secondary air chamber 9, anti-crust block tertiary air curtain jet pipe 10, secondary wind eddy flow guider 11, the steady flame eddy flow of secondary wind guider 12, burner shell 13, high-temperature flame-proof layer 14, base 16, flame-observing hole 17, flame detector 18, automatic ignition device 19, anti-crust block tertiary air curtain control valve 20, secondary air adjustor valve 21 and rear end cap 22 are formed.

Burner shell 13 is installed on the base 16, high-temperature flame-proof layer 14 is installed in burner shell 13 inwalls, rear end cap 22 is installed in rear end at burner shell 13, rear end cap 22 centre bores are connected with wind/coal pipe 2 one ends, the adjusting screw(rod) 4 that has adjusting screw(rod) sleeve pipe 3 is located at wind/coal pipe 2 centres one time, pass at adjusting screw(rod) 4 adjusting handle 1 is installed on the outer end of a wind/coal pipe 2, at the adjusting screw(rod) 4 inner nozzle hole cones 6 of installing, installation shaft flow-generator 5 on the adjusting screw(rod) sleeve pipe 3 in nozzle hole cone 6 outsides, flame-observing hole 17 is installed respectively on rear end cap 22, flame detector 18 and automatic ignition device 19, the steady flame eddy flow of secondary wind guider 12 and secondary wind eddy flow guider 11 are installed outside rear end cap 22 centers successively, the steady flame eddy flow of secondary wind guider 12 and secondary wind eddy flow guider 11 secondary air chamber 9 outer with being located at rear end cap 22 is connected, anti-crust block tertiary air jet pipe 10 is installed between rear end cap 22 and high-temperature flame-proof layer 14, anti-crust block tertiary chamber 8 outside preventing crust block tertiary air jet pipe 10 and being located at rear end cap 22 is connected, a described wind/coal pipe 2 is installed nozzle diffuser 7 near an end of rear end cap 22, the angle of flare coupling of the angle of flare of nozzle diffuser 7 and nozzle hole cone 6 is installed anti-crust block tertiary air curtain control valve 20 and secondary air adjustor valve 21 at the other end of a wind/coal pipe 2.

During work, the present invention is installed in the outside of boiler furnace, communicate with burner hearth, wind and coal dust enter combustion chamber 15 by a wind/coal pipe 2, start axial flow generator 5 and automatic ignition device 19, thereby regulate adjusting handle 1 and regulate the aperture that makes between nozzle hole cone 6 and the nozzle diffuser 7, make wind and coal dust enter the fully burning of 15 backs, combustion chamber, start flame detector 18 simultaneously, air curtain control valve 20, secondary air adjustor valve 21, the wind of anti-crust block tertiary air curtain jet pipe 10 ejections forms air curtain at high-temperature flame-proof layer 14 inwall, secondary wind enters combustion chamber 15 by secondary wind eddy flow guider 11 and the steady flame eddy flow of secondary wind guider 12, with mix after-combustion once more with the coal dust that wind burnt, grasp combustion process by flame-observing hole 17 and flame detector 18, and in time regulate adjusting handle 1, make the more abundant burning of coal dust, high-temperature flue gas enters boiler furnace, and the coal dust ash of burning cinder is discharged from the bottom, combustion chamber.

Claims (2)

1. low NO XThe dry ash extraction coal burner, comprise adjusting handle (1), a wind/coal pipe (2), adjusting screw(rod) sleeve pipe (3), adjusting screw(rod) (4), axial flow generator (5), nozzle hole cone (6), burner shell (13), high-temperature flame-proof layer (14), base (16) and rear end cap (22), burner shell (13) is located on the base (16), high-temperature flame-proof layer (14) is located at burner shell (13) inwall, be provided with rear end cap (22) in the rear end of burner shell (13), the centre bore of rear end cap (22) is connected with wind/coal pipe (2) one ends, the adjusting screw(rod) (4) that has adjusting screw(rod) sleeve pipe (3) is located in the middle of the wind/coal pipe (2), pass at adjusting screw(rod) (4) on the outer end of a wind/coal pipe (2) and be provided with adjusting handle (1), be provided with nozzle hole cone (6) in adjusting screw(rod) (4) the inner, on the adjusting screw(rod) sleeve pipe (3) in nozzle hole cone (6) outside, be provided with axial flow generator (5), on rear end cap (22), be respectively equipped with flame-observing hole (17), flame detector (18) and automatic ignition device (19), it is characterized in that, outside rear end cap (22) center, be provided with the steady flame eddy flow of secondary wind guider (12) and secondary wind eddy flow guider (11) successively, the steady flame eddy flow of secondary wind guider (12) is connected with secondary wind eddy flow guider (11) secondary air chamber (9) outer with being located at rear end cap (22), be provided with anti-crust block tertiary air curtain jet pipe (10) between rear end cap (22) and high-temperature flame-proof layer (14), anti-crust block tertiary air curtain jet pipe (10) the anti-crust block tertiary chamber (8) outer with being located at rear end cap (22) is connected.
2. a kind of low NO according to claim 1 XThe dry ash extraction coal burner, it is characterized in that, a described wind/coal pipe (2) is provided with nozzle diffuser (7) near an end of rear end cap (22), the angle of flare of the angle of flare of nozzle diffuser (7) and nozzle hole cone (6) coupling is provided with anti-crust block tertiary air curtain control valve (20) and secondary air adjustor valve (21) at the other end of a wind/coal pipe (2).
CN2009100465489A 2009-02-24 2009-02-24 Low NOX dry ash extraction coal powder burner CN101482265B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100465489A CN101482265B (en) 2009-02-24 2009-02-24 Low NOX dry ash extraction coal powder burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100465489A CN101482265B (en) 2009-02-24 2009-02-24 Low NOX dry ash extraction coal powder burner

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CN101482265A CN101482265A (en) 2009-07-15
CN101482265B true CN101482265B (en) 2011-10-05

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101915420B (en) * 2010-05-19 2012-02-22 上海题桥能源科技发展有限公司 Low-NOx solid and liquid deslagging dual-swirl coal-dust combustion device
CN102297513A (en) * 2011-02-23 2011-12-28 薛碧 Highly efficient energy-saving environmentally-friendly integrated boiler
CN102305397A (en) * 2011-09-08 2012-01-04 上海题桥能源科技发展有限公司 Low-NOX (nitrogen oxides) slag-tap pulverized coal combustion device with triple rotational air
CN102679339B (en) * 2012-06-05 2014-05-07 唐山市金沙工贸有限公司 Pulverized coal burner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201496954U (en) * 2009-02-24 2010-06-02 上海题桥纺织染纱有限公司 Low NOX solid slag-off pulverized coal burner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201496954U (en) * 2009-02-24 2010-06-02 上海题桥纺织染纱有限公司 Low NOX solid slag-off pulverized coal burner

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