CN101487589B - Low NOX dry ash extraction coal powder burning method - Google Patents
Low NOX dry ash extraction coal powder burning method Download PDFInfo
- Publication number
- CN101487589B CN101487589B CN2009100465474A CN200910046547A CN101487589B CN 101487589 B CN101487589 B CN 101487589B CN 2009100465474 A CN2009100465474 A CN 2009100465474A CN 200910046547 A CN200910046547 A CN 200910046547A CN 101487589 B CN101487589 B CN 101487589B
- Authority
- CN
- China
- Prior art keywords
- wind
- coal
- burner
- coal dust
- rear end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a low NOX solid residue discharge coal dust combustion method which is characterized in that a fire grate at the bottom of an old boiler is dismounted, so that a pure hearth is formed, or a boiler provided with the pure hearth is manufactured; at least one inflamer is arranged at the bottom or one side of the pure hearth; when a primary air fan is started, primary air andcoal dust enter the inflamer through a primary air/coal dust pipe, so that the primary air and the coal dust can burn sufficiently after entering a combustion chamber; meanwhile, a flame detector automatically enters a crust block prevention tertiary air curtain regulating valve which can monitor and has the function of linkage protection and regulation and a secondary air regulating valve, an air curtain is formed on the inner wall of a high temperature fire resistant layer by the wind sprayed out of a crust block prevention tertiary air curtain spray pipe, the secondary air enters the combustion chamber through a secondary air rotational flow guider and a secondary air flame stabilizing rotational flow guider, the rotational flow direction of the secondary air is consistent with that ofan axial flow generator, and the secondary air is mixed with the coal dust burnt by the primary air again to be burnt, thus leading the coal dust to be burnt more fully. The invention has the advantage of burning the coals with low ash fusion point and high ash fusion point.
Description
Technical field
The present invention relates to a kind of low NO
XThe dry ash extraction coal dust combustion method, 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
Chain-grate boiler is the type of furnace of present Industrial Boiler extensive use, as shown in Figure 1, comprise boiler furnace C and traveling-grate stoker B, bunker coal A enters boiler, layer combustion on traveling-grate stoker B, the flue gas of burning is discharged from the outlet D of boiler furnace C, and the shortcoming of this boiler is insufficient with Air mixing during for burning, causes that burning is not thorough, low, the q of burnout rate
4Loss is big, and smoke evacuation contains NOx, SO
2, the dust concentration height, contaminated environment, for addressing these problems, people improve the Industrial Boiler structure, but all do not change traditional combustion system, effect is undesirable.
The name that the applicant applied on July 28th, 2008 is called the utility model patent of " low NOx liquid state slag-off double-eddy flow coal-powder combustor ", and application number is " 200820151316.0 "; Name is called the patent of invention of " a kind of combustion method of Industrial Boiler ", application number is " 200810041070.6 ", 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 dust combustion method.
For realizing above purpose, technical scheme of the present invention provides a kind of low NO
XThe dry ash extraction coal dust combustion method is characterized in that,
The first step is removed the fire grate of old boiler bottom, becomes pure burner hearth, or make one with the be complementary boiler of pure burner hearth of burner, afterbody at boiler is installed air preheater and economizer, and the boiler upper end is connected with air preheater by pipeline, and the air preheater lower end is connected with economizer;
Second step, a bottom or a side at pure burner hearth are installed at least one burner, communicate with pure burner hearth, the entrance point of each burner connects wind/coal pipe one end, wind/coal pipe other end is connected with electronic ratio adjusting valve one end once by the first damping trunnion and connecting hose, the once electronic ratio adjusting valve other end is by an airduct, the second damping trunnion is connected with primary air fan, the connecting hose other end is connected with spiral pneumatic conveying pump, the connecting hose upper end is connected with electronic sealing blanking device lower end by impact flow meter, electronic sealing blanking device upper end is connected with Pulverized Coal Bin by manually gate valve, the Pulverized Coal Bin upper end is installed explosion proof door and breather valve respectively, and be connected burner end two with pulverized coal preparation system, tertiary chamber is connected with air preheater with secondary air adjustor valve by anti-crust block tertiary air curtain control valve;
The 3rd step, open manually gate valve and electronic sealing blanking device, start primary air fan, wind and coal dust are by a wind/coal pipe, the axial flow generator enters burner, start automatic ignition device, thereby regulate the aperture between adjusting handle adjusting nozzle hole cone and the nozzle diffuser, fully burn after making a wind/coal dust enter burner, flame detector enters monitoring automatically simultaneously, interlock protection, regulate anti-crust block tertiary air curtain control valve, secondary air adjustor valve, the wind of anti-crust block tertiary air curtain jet pipe ejection forms air curtain at high-temperature flame-proof layer inwall, secondary wind enters the combustion chamber by secondary wind eddy flow guider and the steady flame eddy flow of secondary wind guider, secondary wind eddy flow direction is consistent with axial flow generator eddy flow direction, with the coal dust mixed combustion once more that wind burnt, grasps combustion process by flame-observing hole and flame detector, and in time regulate adjusting handle, make the more abundant burning of coal dust, high-temperature flue gas enters pure burner hearth, and the coal dust ash of burning cinder is discharged from burner hearth bottom;
In the 4th step, high-temperature flue gas enters pure burner hearth, is absorbed and used by the boiler heating surface flue, and the coal dust ashes that burns is discharged from the automatic soot blower of pure burner hearth bottom.
Described burner comprises adjusting handle, 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 the adjusting screw(rod) sleeve pipe is located at wind/coal pipe center one time, 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, 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, between rear end cap and high-temperature flame-proof layer, be provided with anti-crust block tertiary air curtain jet pipe, prevent crust block tertiary air curtain jet pipe and be located at two outside the rear end cap, tertiary chamber connects, two on the rear end cap, tertiary chamber is connected with the air device by the pipeline that tertiary air curtain control valve and secondary air adjustor valve are installed.
The present invention is installed in secondary air chamber at the rear portion of burner; make wind and secondary wind coaxial; it is more even that eddy flow direction and axial flow generator eddy flow direction one cause combustible to mix; after comburant elder generation and the wind mixed combustion; again with can regulate the mixed combustion of secondary wind; divide section to burn at many levels; sufficient combustion; the burn-off rate height; the present invention increases anti-crust block tertiary air curtain jet pipe between rear end cap and high-temperature flame-proof layer; (45～60m/s) at high-temperature flame-proof layer inwall formation one deck air curtain for the high speed winds that anti-crust block tertiary air curtain jet pipe blows out; 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 simultaneously under the situation of high load capacity, can replenish air; supplemental oxygen makes burning more abundant, and the present invention is owing to designed anti-crust block tertiary air curtain jet pipe core texture with solid-state mode deslagging; the coal of low ash smelting point so 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, the coal of the high ash melting point that can burn again.
Description of drawings
Fig. 1 is a kind of low NO
XDry ash extraction pulverized coal combustion system structural representation;
Fig. 2 is the burner structure schematic diagram;
Fig. 3 is a burner I-I cutaway view;
Fig. 4 is a 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, be a kind of low NO
XDry ash extraction pulverized coal combustion system structural representation, a kind of low NO
XThe dry ash extraction coal dust combustion method is characterized in that,
The first step, the fire grate of old boiler bottom is removed, become pure burner hearth 19, or make the boiler of a pure burner hearth 19 that is complementary with burner, in pure burner hearth 19 1 sides air preheater 18 and economizer 17 are installed, pure burner hearth 19 upper ends are connected with air preheater 18 by pipeline, and air preheater 18 lower ends are connected with economizer 17;
Second step, side in the bottom of pure burner hearth 19 is installed at least one burner 10, communicate with pure burner hearth 19, the entrance point of each burner 10 connects wind/coal pipe 9 one ends, one time wind/coal pipe 9 other ends are connected with motor ratio adjusting valve 11 1 ends with connecting hose 6 respectively by the first damping trunnion 8, motor ratio adjusting valve 11 other ends are by an airduct 14, the second damping trunnion 8 is connected with primary air fan 15, connecting hose 6 other ends are connected with spiral pneumatic conveying pump 7, connecting hose 6 upper ends are connected with electronic sealing blanking device 4 lower ends by impact flow meter 5, electronic sealing blanking device 4 upper ends are connected with Pulverized Coal Bin 2 by manually gate valve 3, Pulverized Coal Bin 2 upper ends are installed explosion proof door 1 and breather valve respectively, and are connected with pulverized coal preparation system;
The 3rd step, open manually gate valve 3 and electronic sealing blanking device 4, start primary air fan 15, wind and coal dust are by a wind/coal pipe 9, axial flow generator 25 enters burner 10, start axial flow generator 25 and automatic ignition device 39, thereby regulate the aperture that adjusting handle 22 is regulated between nozzle hole cone 26 and the nozzle diffuser 27, make wind and coal dust enter the fully burning of 35 backs, combustion chamber, flame detector 38 enters work automatically simultaneously, anti-crust block tertiary air curtain control valve 12, secondary air adjustor valve 13, the wind of anti-crust block tertiary air curtain jet pipe 30 ejections forms air curtain at high-temperature flame-proof layer 34 inwall, secondary wind enters combustion chamber 35 by secondary wind eddy flow guider 31 and the steady flame eddy flow of secondary wind guider 32, secondary wind eddy flow direction is consistent with axial flow generator eddy flow direction, 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 22, make the more abundant burning of coal dust, high-temperature flue gas enters pure burner hearth 19, and the coal dust ash of burning cinder is discharged from burner hearth bottom;
In the 4th step, high-temperature flue gas enters pure burner hearth 19, is absorbed and used by the boiler heating surface flue, and the coal ash powder branch that burns is discharged from the automatic soot blower 16 of pure burner hearth 19 bottoms.
Shown in Fig. 2,3,4, be the burner structure schematic diagram, described low NO
XThe dry ash extraction coal burner is by adjusting handle 22, adjusting screw(rod) sleeve pipe 23, adjusting screw(rod) 24, axial flow generator 25, nozzle hole cone 26, nozzle diffuser 27, anti-crust block tertiary chamber 28, secondary air chamber 29, anti-crust block tertiary air jet pipe 30, secondary wind eddy flow guider 31, the steady flame eddy flow of secondary wind guider 32, burner shell 33, high-temperature flame-proof layer 34, base 36, flame-observing hole 37, flame detector 38, automatic ignition device 39, air curtain is prevented crust block tertiary air control valve 12, secondary air adjustor valve 13 and rear end cap 40 are formed.
Claims (3)
1. low NO
XThe dry ash extraction coal dust combustion method is characterized in that,
The first step, the fire grate of old boiler bottom is removed, become pure burner hearth (19), or make a boiler with the pure burner hearth (19) of burner coupling, at pure burner hearth (19) afterbody air preheater (18) and economizer (17) are installed, pure burner hearth (19) upper end is connected with air preheater (18) by pipeline, and air preheater (18) lower end is connected with economizer (17);
Second step, a bottom or a side at pure burner hearth (19) are installed at least one burner (10), communicate with pure burner hearth (19), the entrance point of each burner (10) connects wind/coal pipe (9) one ends, a wind/coal pipe (9) other end is connected with motor ratio adjusting valve (11) one ends with connecting hose (6) respectively by the first damping trunnion (8), a motor ratio adjusting valve (11) other end is by an airduct (14), the second damping trunnion (8) is connected with primary air fan (15), connecting hose (6) other end is connected with spiral pneumatic conveying pump (7), connecting hose (6) upper end is connected with electronic sealing blanking device (4) lower end by impact flow meter (5), electronic sealing blanking device (4) upper end is connected with Pulverized Coal Bin (2) by manually gate valve (3), Pulverized Coal Bin (2) upper end is installed explosion proof door (1) and breather valve respectively, and be connected burner (10) end two with pulverized coal preparation system, tertiary chamber is connected with air preheater (18) with secondary air adjustor valve (13) by anti-crust block tertiary air curtain control valve (12);
The 3rd step, open manually gate valve (3) and electronic sealing blanking device (4), start primary air fan (15), wind and coal dust are by a wind/coal pipe (9), axial flow generator (25) enters burner (10), start axial flow generator (25) and automatic ignition device (39), regulate adjusting handle (22) thereby the aperture between adjusting nozzle hole cone (26) and the nozzle diffuser (27), make wind and coal dust enter fully burning behind the combustion chamber (35), flame detector (38) enters monitoring automatically simultaneously, interlock protection, regulate anti-crust block tertiary air curtain control valve (12), secondary air adjustor valve (13), the wind of anti-crust block tertiary air curtain jet pipe (30) ejection forms air curtain at high-temperature flame-proof layer (34) inwall, secondary wind enters combustion chamber (35) by secondary wind eddy flow guider (31) and the steady flame eddy flow of secondary wind guider (32), secondary wind eddy flow direction is consistent with axial flow generator eddy flow direction, 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 (22), make the more abundant burning of coal dust, high-temperature flue gas enters pure burner hearth (19), and the coal dust ash of burning cinder is discharged from burner hearth bottom;
In the 4th step, high-temperature flue gas enters pure burner hearth (19), is absorbed and used by the boiler heating surface flue, and the coal dust ashes that burns is discharged from the automatic soot blower (16) of pure burner hearth (19) bottom.
2. a kind of low NO according to claim 1
XThe dry ash extraction coal dust combustion method, it is characterized in that, described burner (10) comprises adjusting handle (22), adjusting screw(rod) sleeve pipe (23), adjusting screw(rod) (24), axial flow generator (25), nozzle hole cone (26), burner shell (33), high-temperature flame-proof layer (34), base (36) and rear end cap (40), burner shell (33) is located on the base (36), high-temperature flame-proof layer (34) is located at burner shell (33) inwall, be provided with rear end cap (40) in the rear end of burner shell (33), the centre bore of rear end cap (40) is connected with wind/coal pipe (9) one ends, the adjusting screw(rod) (24) that has adjusting screw(rod) sleeve pipe (23) is located in the middle of the wind/coal pipe (9), pass at adjusting screw(rod) (24) on the outer end of a wind/coal pipe (22) and be provided with adjusting handle (22), be provided with nozzle hole cone (26) in adjusting screw(rod) (24) the inner, on the adjusting screw(rod) sleeve pipe (23) in nozzle hole cone (26) outside, be provided with axial flow generator (25), on rear end cap (40), be respectively equipped with flame-observing hole (37), flame detector (38) and automatic ignition device (39), it is characterized in that, outside rear end cap (40) center, be provided with the steady flame eddy flow of secondary wind guider (32) and secondary wind eddy flow guider (31) successively, the steady flame eddy flow of secondary wind guider (32) is connected with secondary wind eddy flow guider (31) secondary air chamber (29) outer with being located at rear end cap (40), between rear end cap (40) and high-temperature flame-proof layer (34), be provided with anti-crust block tertiary air curtain jet pipe (30), anti-crust block tertiary air curtain jet pipe (30) tertiary chamber (28) outer with being located at rear end cap (42) is connected, and rear end cap (40) is connected with air preheater (18) by the pipeline that tertiary air curtain control valve (12) and secondary air adjustor valve (13) are installed.
3. a kind of low NO according to claim 2
XThe dry ash extraction coal dust combustion method is characterized in that, a described wind/coal pipe (9) is provided with nozzle diffuser (27) near an end of rear end cap (42), the angle of flare coupling of the angle of flare of nozzle diffuser (27) and nozzle hole cone (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100465474A CN101487589B (en) | 2009-02-24 | 2009-02-24 | Low NOX dry ash extraction coal powder burning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100465474A CN101487589B (en) | 2009-02-24 | 2009-02-24 | Low NOX dry ash extraction coal powder burning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101487589A CN101487589A (en) | 2009-07-22 |
| CN101487589B true CN101487589B (en) | 2010-11-10 |
Family
ID=40890594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100465474A Expired - Fee Related CN101487589B (en) | 2009-02-24 | 2009-02-24 | Low NOX dry ash extraction coal powder burning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101487589B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100965A (en) * | 2013-04-11 | 2014-10-15 | 沈阳百得威远科技有限公司 | Industrial boiler energy-saving combustion system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629716B (en) * | 2009-08-26 | 2011-10-05 | 上海题桥纺织染纱有限公司 | Vertical arrangement method of low-NOx solid-liquid state deslagging pulverized coal burner |
| CN101936525B (en) * | 2010-09-27 | 2012-05-30 | 上海交通大学 | Low NOx rotational flow coal dust combustion device of industrial boiler |
| CN112354672B (en) * | 2020-10-16 | 2022-09-20 | 内蒙古京能康巴什热电有限公司 | Control method for output of coal mill in ignition process of boiler |
-
2009
- 2009-02-24 CN CN2009100465474A patent/CN101487589B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100965A (en) * | 2013-04-11 | 2014-10-15 | 沈阳百得威远科技有限公司 | Industrial boiler energy-saving combustion system |
| CN104100965B (en) * | 2013-04-11 | 2016-04-06 | 沈阳百得威远科技有限公司 | Industrial boiler energy-saving combustion system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101487589A (en) | 2009-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101334164B (en) | Industrial boiler combustion method | |
| CN103912866B (en) | A kind of biomass granule fuel stability and high efficiency burner and method | |
| CN101482265B (en) | Low NOX dry ash extraction coal powder burner | |
| CN105864748A (en) | Combined combustion system of chain boiler | |
| CN101487589B (en) | Low NOX dry ash extraction coal powder burning method | |
| JPS6323442B2 (en) | ||
| CN105202575B (en) | Coal dust or broken coal burning produce the method and device of high temperature hyperoxia torch ignition | |
| CN106931451B (en) | Spiral-flow type incinerator | |
| CN201237236Y (en) | Composite secondary air apparatus for chain boiler combustion | |
| CN101122385A (en) | Coal, gas integral cleaning combustion boiler | |
| CN210688167U (en) | Boiler capable of burning biomass fuel based on transformation of existing gas-fired boiler | |
| CN201496954U (en) | Low NOX solid slag-off pulverized coal burner | |
| CN201606876U (en) | Low-NOx coal burner | |
| CN213777698U (en) | Stable combustion burner system | |
| CN2901154Y (en) | Gasifying room burning boiler | |
| CN210373405U (en) | Vertical pulverized coal boiler | |
| CN102748855B (en) | Energy-saving vertical type coal dust hot-blast stove with double combustion nozzles | |
| CN207230527U (en) | A kind of low nitrogen combustion apparatus of coal dust gasification burning | |
| CN206191572U (en) | Fluidized bed boiler lighting up and low -load stable -combustion combustor | |
| CN217503635U (en) | Bottom air supporting system of opposed combustion boiler and opposed combustion boiler | |
| CN200975688Y (en) | Multipurpose secondary combustion environmental protection energy-saving furnace | |
| CN212108476U (en) | Biomass hot-blast stove suitable for grain drying tower | |
| CN102012022B (en) | Pulverized coal jetting and combusting mechanism | |
| CN215675186U (en) | Environment-friendly directional incineration burner | |
| CN2270887Y (en) | Raw coal gasification combustion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHENG WENPING Free format text: FORMER OWNER: SHANGHAI TIQIAO TEXTILE + YARN DYEING CO., LTD. Effective date: 20110610 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201114 NO. 519, LIYUE ROAD, PUJIANG TOWN, MINHANG DISTRICT, SHANGHAI TO: 132000 ROOM 602, UNIT 2, BUILDING 4, HENGDONG GARDEN, HENGSHAN EAST ROAD, JILIN STREET, JILIN CITY, JILIN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110610 Address after: 132000 Jilin province Jilin city Jilin street Mt. Hengshan road Hengdong Garden Building 4 room 602 unit 2 Patentee after: Zheng Wenping Address before: 201114 No. 519 Li Yue Road, Pujiang Town, Shanghai, Minhang District Patentee before: Shanghai Tiqiao Textile & Yarn Dyeing Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20170224 |