CN100532937C - Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding - Google Patents
Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding Download PDFInfo
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- CN100532937C CN100532937C CNB2007100725773A CN200710072577A CN100532937C CN 100532937 C CN100532937 C CN 100532937C CN B2007100725773 A CNB2007100725773 A CN B2007100725773A CN 200710072577 A CN200710072577 A CN 200710072577A CN 100532937 C CN100532937 C CN 100532937C
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Abstract
The invention relates to swirl-flow burner. The first, second, and third truncated cone shape separating rings are orderly set at the middle of the burner primary flue in which the backward V shape separator is fixed at the right of the third truncated cone shape separating ring. The invention can greatly reduce initiation energy, satisfy the demands of start stop, and under load stable combustion for boiler, prolong coal dust residence time, control NOx production, form fractional combustion to combine with center feeding, realize NOx low discharge owing to secondary draft is divided into inner and outer two parts.
Description
Technical field
The present invention relates to a kind of turbulent burner.
Background technology
In the big Capacity Power Plant Boilers of China's operation, ignition of the boiler and low-load combustion-stabilizing are huge with oil mass, electricity power enterprise is in order to save fuel oil, and the fuel-economizing emphasis turns to ignition of the boiler and furnace shutting down process (oil consumption accounts for 60% during the boiler of power plant start and stop, and the low-load combustion-stabilizing oil consumption accounts for 40%) by the low-load combustion-stabilizing process.According to traditional approach, torch oil gun is arranged in the overfiren air port of burner, the distance of oil gun and coal dust spout is distant, and these two strands of air-flows are parallel to each other again, therefore when igniting, it is fewer that the heat that fuel oil produces is directly used in the part that heats coal dust, and heat utilization ratio is low, when making ignition of the boiler, the consumption of fuel oil is very big.The tiny-oil ignition technology is that a kind of boiler of power plant that is applied to starts, stops and the new method of low-load combustion-stabilizing.China Patent No. be ZL200520145352.2, Granted publication number be that the utility model patent on January 3rd, 2007 discloses a kind of " burner capable of using various coal and little oil igniting " for CN2854368, Granted publication day.This apparatus structure is simple, and is reliable and stable, non-detonating, and noncoking, igniting is exerted oneself big, and speed is fast, and rate of economizing gasoline can reach more than 90%, is fit to various types of coal dusts.Chinese patent application number is 200610053092.5, publication number is CN1912462, open day to be that the patent of invention on February 14th, 2007 discloses a kind of " little oil cooling furnace igniting and ultra-low load steady combustion and have the turbulent burner of low NOx drainage ", reach more than 95% by this device rate of economizing gasoline, have underload and ultra-low load steady combustion ability.But the oil gun of these two kinds of devices all stretches in air channel of burner.During the burner operation, the oil gun sleeve pipe is in washing away of pulverized coal particle for a long time, easily causes the wearing and tearing of main oil gun sleeve pipe, in case produce wearing and tearing, little oil drop fire can't start, and be difficult for satisfying desired service life, and big unit is higher to requiring in service life of equipment.On the other hand, the composite chamber of two kinds of devices is positioned at behind deflection cone or the pulverized coal concentrator and with the oil gun outlet and links to each other, a whole set of oil gun burner occupies the certain area in center, an airduct road of burner, when stopping using oil gun, the coal dust that pulverized coal concentrator concentrates concentrates on the outside of recirculating zone, center, and NOx is not reduced to greatest extent.
Turbulent burner occupies certain ratio at China's station boiler and other coal dust application.Adopt the large coal powder boiler of turbulent burner that its unique advantage is arranged: the thermal deviation that at first can avoid the superheater district to produce; Next is that the burner hearth shape is not had strict requirement.Turbulent burner by high temperature recirculation zone as stable thermal source, make breeze airflow can be timely the smooth combustion of fighting, common turbulent burner primary and secondary air is mixed strong, the temperature peak height, nitrogen oxide (NOx) growing amount is big.The NOx of thermal power plant control mainly contains two kinds of approach, and the one, adopt low NOx combusting technology to reduce the generation of NOx, the 2nd, from flue gas, remove NOx, under the present economic level of China, the former comparatively effective, economically viable method; The latter's subject matter is to invest too highly, and is not suitable for China's national situation.Along with China's unit day by day to the development of big capacity, the development of spiral-flow powdered coal burning technology has been proposed urgent requirement.Therefore, research micro-oil ignition rotational flow combustion technology all is that crucial meaning is arranged to the development of China's power industry and whole national economy.
Summary of the invention
The objective of the invention is for the large coal powder boiler that solves present employing turbulent burner station boiler when reducing the NOx discharging start, stop and the low-load combustion-stabilizing situation under the fuel-economizing problem, and long-time the use, cause wear problems, now propose a kind of small oil mass gasification combustion, side direction and light the turbulent burner that powder is given at the center.The present invention is by air channel 1 of burner, the first truncated cone eseparation ring 2-1, the second truncated cone eseparation ring 2-2, the 3rd truncated cone eseparation ring 2-3, interior cyclone 3, secondary air duct 4 in the burner, outer cyclone 5, the outer secondary air duct 6 of burner, nozzles 7, fall " V " shape dividing plate 8, secondary combustion chamber 9, one-level combustion chamber 10, auxiliary oil gun 11, main oil gun sleeve pipe 12, burning torch 13, main oil gun 14 and fire inspection pipe 15 are formed, the port of export in an air channel 1 of burner is nozzles 7, secondary air duct 4 is fixed on the lateral surface of air channel 1 port of export of burner in the burner, interior cyclone 3 is fixed between air channel 1 of burner and the interior secondary air duct 4 of burner, outer cyclone 5 is fixed on the lateral surface of secondary air duct 4 in the burner, the outer secondary air duct 6 of burner is fixed on the lateral surface of the interior secondary air duct 4 of burner on outer cyclone 5 right sides, the first truncated cone eseparation ring 2-1, the second truncated cone eseparation ring 2-2 and the 3rd truncated cone eseparation ring 2-3 are successively set on the middle part in air channel of burner 1, " V " shape dividing plate 8 that falls is fixed in the air channel 1 of burner on the 3rd truncated cone eseparation ring 2-3 right side, auxiliary oil gun 11 is fixed on the air channel 1 of burner in secondary air duct 4 left sides in the burner, main oil gun sleeve pipe 12 is fixed on the air channel 1 of burner in auxiliary oil gun 11 left sides, burning torch 13 and main oil gun 14 all are fixed in the main oil gun sleeve pipe 12, fire inspection pipe 15 is fixed on the air channel 1 of burner in main oil gun sleeve pipe 12 left sides, form secondary combustion chamber 9 in the air channel of burner 1 on " V " shape dividing plate 8 right sides, oil gun 11 is assisted in the following formation one-level combustion chamber 10 of " V " shape dividing plate 8, main oil gun sleeve pipe 12 and fire inspection pipe 15 and air channel 1 link of burner all are connected with the following one-level combustion chamber 10 of " V " shape dividing plate 8.Advantage of the present invention is: air channel 1 of burner is positioned at the center of burner, and oil gun rifle head direction is pointed to the coal dust center, forms thermal-flame.After coal dust of sending here from wind pulverized coal feed pipe and air flowed into three truncated cone eseparation rings in wind passage of burner 1, coal dust was focused on the center of burner, forms high concentration pulverized coal.The part high concentration pulverized coal enters one-level combustion chamber 10, burning torch 13 is at first lighted main oil gun 14, the thermal-flame that main then oil gun 14 forms directly contacts with the thick coal culm particle in the one-level combustion chamber 10 characteristic of pulverized coal particle is changed, the high rate of heat addition is accelerated the fugitive constituent speed of separating out greatly, the pulverized coal particle temperature sharply raises, explosion, pulverize and violent burning, enter secondary combustion chamber 9 then and contact and light remaining coal dust with remaining pulverized coal particle, realized the fractional combustion of coal dust, burning capacity is amplified step by step, spray into burner hearth through nozzles 7 at last, reaching a little fights quickens the purpose of coal dust firing, significantly reduce the required fire ignition energy of coal dust firing, satisfied boiler and opened, stop and the demand of low-load combustion-stabilizing.Auxiliary oil gun 11, main oil gun sleeve pipe 12, burning torch 13 and main oil gun 14 all outside airduct 1 of burner, have solved the wear problem of main oil gun sleeve pipe 12.The flame holding that fire inspection pipe 15 can detect in the one-level combustion chamber 10 at any time.When flame instability, can in time enable auxiliary oil gun 11, help coal dust firing.The inverted v-shaped dividing plate outside of one-level combustion chamber 10 is connected with wind all the time one time, the outside, an airduct road of burner is connected with secondary wind all the time, primary and secondary air plays the effect of wind film cooling, can cool off one-level combustion chamber 10 and secondary combustion chamber 9, prevent wind pipe wall scaling loss of inverted v-shaped dividing plate and burner.Because the parts in airduct road of burner 1 are few, the area that takies an airduct road 1 of burner is little, and is little to the function influence of truncated cone eseparation ring, and the oil gun afterburner of stopping using still is a bias combustion, can normally do low-NOx combustor and use.Secondary wind enters separated into two parts behind the burner by secondary air box, they enter burner hearth 8 through secondary air duct 4 in the outer secondary air duct 6 of burner, the burner respectively, regulate the aperture of inside and outside cyclone, can change the ratio of inside and outside swirl secondary air, make the rotation of secondary wind by interior cyclone 3, outer cyclone 5, form the recirculating zone, center in the central area of burner.Coal dust is concentrated and is sprayed into the center recirculating zone core of position over against burner, and the coal dust amount of passing through the recirculating zone, center increases, and coal dust burns under the hypoxemia reducing atmosphere, prolongs the time of staying of coal dust, can control the generation of burning type NOx.Because secondary wind has been divided into inside and outside two parts, thereby has formed fractional combustion, combines to powder with the center, has realized low NOx drainage.Therefore, the present invention is a kind of swirling pulverized coal combustion device of saving fuel oil, low NOx drainage.
Description of drawings
Fig. 1 is overall structure master's cutaway view of the present invention, and Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
The specific embodiment one: (referring to Fig. 1, Fig. 2) present embodiment is by air channel 1 of burner, the first truncated cone eseparation ring 2-1, the second truncated cone eseparation ring 2-2, the 3rd truncated cone eseparation ring 2-3, interior cyclone 3, secondary air duct 4 in the burner, outer cyclone 5, the outer secondary air duct 6 of burner, nozzles 7, fall " V " shape dividing plate 8, secondary combustion chamber 9, one-level combustion chamber 10, auxiliary oil gun 11, main oil gun sleeve pipe 12, burning torch 13, main oil gun 14 and fire inspection pipe 15 are formed, the port of export in an air channel 1 of burner is nozzles 7, secondary air duct 4 is fixed on the lateral surface of air channel 1 port of export of burner in the burner, interior cyclone 3 is fixed between air channel 1 of burner and the interior secondary air duct 4 of burner, outer cyclone 5 is fixed on the lateral surface of secondary air duct 4 in the burner, the outer secondary air duct 6 of burner is fixed on the lateral surface of the interior secondary air duct 4 of burner on outer cyclone 5 right sides, the first truncated cone eseparation ring 2-1, the second truncated cone eseparation ring 2-2 and the 3rd truncated cone eseparation ring 2-3 are successively set on the middle part in air channel of burner 1, " V " shape dividing plate 8 that falls is fixed in the air channel 1 of burner on the 3rd truncated cone eseparation ring 2-3 right side, auxiliary oil gun 11 is fixed on the air channel 1 of burner in secondary air duct 4 left sides in the burner, main oil gun sleeve pipe 12 is fixed on the air channel 1 of burner in auxiliary oil gun 11 left sides, burning torch 13 and main oil gun 14 all are fixed in the main oil gun sleeve pipe 12, fire inspection pipe 15 is fixed on the air channel 1 of burner in main oil gun sleeve pipe 12 left sides, form secondary combustion chamber 9 in the air channel of burner 1 on " V " shape dividing plate 8 right sides, oil gun 11 is assisted in the following formation one-level combustion chamber 10 of " V " shape dividing plate 8, main oil gun sleeve pipe 12 and fire inspection pipe 15 and air channel 1 link of burner all are connected with the following one-level combustion chamber 10 of " V " shape dividing plate 8.
The specific embodiment two: the head of the main oil gun 14 of (referring to Fig. 1) present embodiment, auxiliary oil gun 11, burning torch 13 and main oil gun sleeve pipe 12 is arranged on the side in an air channel 1 of burner towards the direction of the nozzles 7 in an air channel 1 of burner, the afterbody of main oil gun 14, auxiliary oil gun 11, burning torch 13 and main oil gun sleeve pipe 12 sticks up outward, and main oil gun 14, auxiliary oil gun 11, burning torch 13 and main oil gun sleeve pipe 12 are 55 °～65 ° with the angle of burner center line.Other is identical with the specific embodiment one.
The specific embodiment three: the main oil gun 14 of (referring to Fig. 1) present embodiment, auxiliary oil gun 11, burning torch 13 and main oil gun sleeve pipe 12 are 60 ° with the angle of burner center line.Other is identical with the specific embodiment two.
The specific embodiment four: the main oil gun 14 of (referring to Fig. 1) present embodiment, auxiliary oil gun 11, fire inspection pipe 15 are telescopic structure, the position of promptly when oil gun device is stopped using, deactivating, thus protected oil gun device not burnt out.Other is identical with the specific embodiment three.
The specific embodiment five: air channel 1 in two lower ends and burner of " V " shape dividing plate 8 of (referring to Fig. 1, Fig. 2) present embodiment is connected, the top at " V " shape dividing plate 8 centers and the dead in line in an air channel 1 of burner, the sectional area of one-level combustion chamber 10 accounts for 1/4th to 1/3rd of air channel 1 sectional area of burner.Other is identical with the specific embodiment four.
The specific embodiment six: the diameter of the big end of (referring to Fig. 1) present embodiment the 3rd truncated cone eseparation ring 2-3 is less than the diameter of the second truncated cone eseparation ring 2-2 small end, and the diameter of the big end of the second truncated cone eseparation ring 2-2 is less than the diameter of the first truncated cone eseparation ring 2-1 small end.Other is identical with the specific embodiment five.
The specific embodiment seven: small end one side of (referring to Fig. 1) present embodiment first truncated cone eseparation ring 2-1, the second truncated cone eseparation ring 2-2 and the 3rd truncated cone eseparation ring 2-3 is all towards the nozzles 7 in an air channel 1 of burner.Other is identical with the specific embodiment six.
Claims (7)
1, a kind of small oil mass gasification combustion, side direction is lighted the turbulent burner that powder is given at the center, it is by an air channel of burner (1), the first truncated cone eseparation ring (2-1), the second truncated cone eseparation ring (2-2), the 3rd truncated cone eseparation ring (2-3), interior cyclone (3), secondary air duct (4) in the burner, outer cyclone (5), the outer secondary air duct (6) of burner, nozzles (7), fall " V " shape dividing plate (8), secondary combustion chamber (9), one-level combustion chamber (10), auxiliary oil gun (11), main oil gun sleeve pipe (12), burning torch (13), main oil gun (14) and fire inspection pipe (15) are formed, the port of export in an air channel of burner (1) is nozzles (7), secondary air duct (4) is fixed on the lateral surface of an air channel of burner (1) port of export in the burner, interior cyclone (3) is fixed between an air channel of burner (1) and the interior secondary air duct (4) of burner, outer cyclone (5) is fixed on the lateral surface of secondary air duct (4) in the burner, the outer secondary air duct (6) of burner is fixed on the lateral surface of the interior secondary air duct (4) of burner on outer cyclone (5) right side, it is characterized in that the first truncated cone eseparation ring (2-1), the second truncated cone eseparation ring (2-2) and the 3rd truncated cone eseparation ring (2-3) are successively set on the middle part in the air channel of burner (1), " V " shape dividing plate (8) that falls is fixed in the air channel of burner (1) on the 3rd truncated cone eseparation ring (2-3) right side, auxiliary oil gun (11) is fixed on the air channel of burner (1) in secondary air duct (4) left side in the burner, main oil gun sleeve pipe (12) is fixed on the air channel of burner (1) in auxiliary oil gun (11) left side, burning torch (13) and main oil gun (14) all are fixed in the main oil gun sleeve pipe (12), fire inspection pipe (15) is fixed on the air channel of burner (1) in main oil gun sleeve pipe (12) left side, form secondary combustion chamber (9) in the air channel of burner (1) on " V " shape dividing plate (8) right side, oil gun (11) is assisted in the following formation one-level combustion chamber (10) of " V " shape dividing plate (8), main oil gun sleeve pipe (12) and fire inspection pipe (15) and an air channel of burner (1) link all are connected with the following one-level combustion chamber (10) of " V " shape dividing plate (8).
2, a kind of small oil mass gasification combustion according to claim 1, side direction is lighted the turbulent burner that powder is given at the center, it is characterized in that main oil gun (14), auxiliary oil gun (11), the head of burning torch (13) and main oil gun sleeve pipe (12) is arranged on the side in an air channel of burner (1) towards the direction of the nozzles (7) in an air channel of burner (1), main oil gun (14), auxiliary oil gun (11), the afterbody of burning torch (13) and main oil gun sleeve pipe (12) sticks up outward, main oil gun (14), auxiliary oil gun (11), burning torch (13) and main oil gun sleeve pipe (12) are 55 °～65 ° with the angle of burner center line.
3, a kind of small oil mass gasification combustion according to claim 2, side direction are lighted the turbulent burner that powder is given at the center, it is characterized in that main oil gun (14), auxiliary oil gun (11), burning torch (13) and main oil gun sleeve pipe (12) and the angle of burner center line are 60 °
4, a kind of small oil mass gasification combustion according to claim 3, side direction are lighted the turbulent burner that powder is given at the center, it is characterized in that main oil gun (14), auxiliary oil gun (11), fire inspection pipe (15) are telescopic structure.
5, a kind of small oil mass gasification combustion according to claim 4, side direction are lighted the turbulent burner that powder is given at the center, two lower ends that it is characterized in that down " V " shape dividing plate 8 are connected with an air channel of burner (1), the top at " V " shape dividing plate (8) center and the dead in line in an air channel of burner (1), the sectional area of one-level combustion chamber (10) accounts for 1/4th to 1/3rd of an air channel of burner (1) sectional area.
6, a kind of small oil mass gasification combustion according to claim 5, side direction are lighted the turbulent burner that powder is given at the center, it is characterized in that the diameter of the diameter of the big end of the 3rd truncated cone eseparation ring (2-3) less than second truncated cone eseparation ring (2-2) small end, the diameter of the big end of the second truncated cone eseparation ring (2-2) is less than the diameter of first truncated cone eseparation ring (2-1) small end.
7, the turbulent burner of powder is given at a kind of small oil mass gasification combustion according to claim 6, the side direction center of lighting, and small end one side that it is characterized in that the first truncated cone eseparation ring (2-1), the second truncated cone eseparation ring (2-2) and the 3rd truncated cone eseparation ring (2-3) is all towards the nozzles (7) in an air channel of burner (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100725773A CN100532937C (en) | 2007-07-27 | 2007-07-27 | Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100725773A CN100532937C (en) | 2007-07-27 | 2007-07-27 | Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101101115A CN101101115A (en) | 2008-01-09 |
| CN100532937C true CN100532937C (en) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100725773A Expired - Fee Related CN100532937C (en) | 2007-07-27 | 2007-07-27 | Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100532937C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100585276C (en) * | 2008-06-20 | 2010-01-27 | 哈尔滨工业大学 | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion |
| CN101403497B (en) * | 2008-11-12 | 2010-10-06 | 哈尔滨工业大学 | Micro-oil ignition rotational flow breeze combustion device for preventing slag bonding of primary combustion chamber |
| CN102418922B (en) * | 2011-11-07 | 2013-12-18 | 华北电力大学 | Oxygen-enriched ignition and low-load stable combustion coal combustor |
| CN103486582A (en) * | 2013-09-29 | 2014-01-01 | 哈尔滨工业大学 | Center powder feeding turbulent burner with straight sleeve barrel in center |
| CN109931605B (en) * | 2019-04-15 | 2024-05-28 | 北京国电龙高科环境工程技术有限公司 | Multistage air distribution radial outer thick and inner thin cyclone burner |
| CN114877314A (en) * | 2022-05-17 | 2022-08-09 | 哈尔滨工业大学 | Rotational flow pulverized coal boiler device and method for coupling combustion of gasified crude synthesis gas and coal |
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2007
- 2007-07-27 CN CNB2007100725773A patent/CN100532937C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101101115A (en) | 2008-01-09 |
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Granted publication date: 20090826 Termination date: 20120727 |