CN101329064A - Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion - Google Patents
Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion Download PDFInfo
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- CN101329064A CN101329064A CNA2008100647834A CN200810064783A CN101329064A CN 101329064 A CN101329064 A CN 101329064A CN A2008100647834 A CNA2008100647834 A CN A2008100647834A CN 200810064783 A CN200810064783 A CN 200810064783A CN 101329064 A CN101329064 A CN 101329064A
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Abstract
The invention discloses a low fuel-consumption gasified-combustion, side-multilevel open-ignition and central powder-supply turbulent burner which relates to the turbulent burner and aims at solving the problems about how to reduce the large quantity of coal powder to be ignited when the existing micro fuel-consumption ignition turbulent burner is applied to large-volume boilers, and how to conserve fuel consumed by a power-station boiler on the conditions that the boiler is started and stopped and works with low load when reducing the NOx discharged by a large-scale coal powder boiler adopting the turbulent burner. A first-class firebox of the invention is fixed in a first air-channel pipe at the front end of a support board; a second-class firebox is fixed in a first air-channel pipe at the front end of the first-class firebox; a third-class firebox is arranged in the first air-channel pipe at the front of the second-class firebox; a primary fuel-gun is communicated with a primary air channel of the burner. In the invention, the coal powder is combusted under a low oxygen reduction condition to prolong the stay time of the coal powder so as to control the generation of consumption-typed NOx. As the secondary air is divided into two pars of inner and outer, classified combustion is formed, low NOx discharge is realized and fuel is saved.
Description
Technical field
The present invention relates to a kind of turbulent burner.
Background technology
In the big Capacity Power Plant Boilers of existing 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 technology 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.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 ", and the oil gun of these two kinds of devices all extend 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 above-mentioned 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.Chinese patent application number is 200710072577.3, publication number is CN101101115, open day is that on 01 09th, 2008 patent of invention discloses " a kind of small oil mass gasification combustion side direction is lighted the center powder-feeding swirling burner ", its first-stage burning chamber is for falling " V " shape layout, fine in low capacity boiler adaptability, but to comprise the center thick coal culm less in the first-stage burning chamber when heavy duty boiler is used, first-stage burning chamber coal powder density is lower, be unfavorable for that coal dust lights, and owing to have only the two-stage combustion chamber to light, it is less that first order coal dust is lighted the entrained heat in back, the coal dust that the second level need be lighted is too many, causes loss of ignition.
Summary of the invention
The objective of the invention is for solve large coal powder boiler station boiler startup when reducing the NOx discharging of needing the firing coal-dust amount to reach greatly when existing micro-oil ignition rotational flow burner is used to adopt turbulent burner on heavy duty boiler, stop and the low-load combustion-stabilizing situation under the fuel-economizing problem, a kind of small oil mass gasification combustion side direction multilevel open type igniting center powder-feeding swirling burner now is provided.The present invention comprises air channel of burner, concentrate ring, gripper shoe, interior cyclone, interior secondary wind air channel, outer cyclone, outer secondary wind air channel, nozzles, support bar, third level combustion chamber, combustion chamber, the second level, the first-stage burning chamber, main oil gun, block, first wind channel tube, second wind channel tube and the 3rd wind channel tube, in first wind channel tube is air channel of burner, the port of export of first wind channel tube is nozzles, gripper shoe is fixed on the arrival end in first wind channel tube, concentrated ring is fixed on the gripper shoe, the first-stage burning chamber is fixed in first wind channel tube of gripper shoe front end, combustion chamber, the second level is fixed in first wind channel tube of first-stage burning chamber front end, in first wind channel tube of front side, combustion chamber, the second level is third level combustion chamber, air channel of main oil gun and burner is connected, the port of export of main oil gun is corresponding with the arrival end of first-stage burning chamber, second wind channel tube is fixed on the front end of the first wind channel tube outer surface, it between second wind channel tube and first wind channel tube interior secondary wind air channel, interior cyclone is fixed in the interior secondary wind air channel, the 3rd wind channel tube is fixed on the front end of the second wind channel tube outer surface, it between the 3rd wind channel tube and second wind channel tube outer secondary wind air channel, outer cyclone is fixed in the outer secondary wind air channel, first wind channel tube, the front end of second wind channel tube and the 3rd wind channel tube is interconnected by support bar, block is fixed on the inwall of first wind channel tube of rear end, first-stage burning chamber, combustion chamber, the second level comprises upper plate and lower plate, fixedly connected with the upper inside walls of first wind channel tube in the upper end of upper plate, fixedly connected with the downside inwall of first wind channel tube in the lower end of lower plate, upper plate and lower plate are symmetrical arranged in first wind channel tube, are provided with the slit between the lower end of upper plate and the upper end of lower plate.
Advantage of the present invention is: breeze airflow form higher coal powder density in the central area in an air channel of burner, and coal powder density is very low near the wall of limit through behind the inspissator.The present invention is provided with block and has blocked part thin powdered coal air-flow before the first-stage burning chamber inlet, improved the coal powder density 5%～10% of first-stage burning chamber, it is indoor that the first-stage burning chamber is included in first-stage burning to the breeze airflow of partial concentration in air channel of burner, the coal powder density of first-stage burning chamber is increased, help coal powder ignition.Combustion chamber, the second level is open combustion chamber, when coal dust firing generation exhaust gas volumn causes that resistance is excessive greatly, flue gas can enter the space in the outside, combustion chamber, the second level by the slit of combustion chamber, the second level two plates, flue gas resistance is reduced, and this part heat has suitably heated the coal dust in the outside, combustion chamber, the second level, easier being lighted when making coal dust enter third level combustion chamber, the high temperature that has formed when also having avoided simultaneously the coal dust amount to increase burns out combustion chamber, the second level.Because combustion chamber, the second level has comprised the zone high than the coal powder density of multicenter, along with increasing of coal dust input amount behind the boiler startup, the coal dust amount increase of combustion chamber, the second level is very fast, the coal dust liberated heat of the burning of combustion chamber, the second level is lighted the coal dust of third level combustion chamber, further realize the amplification step by step of energy, significantly reduced the required fire ignition energy of coal dust firing.The present invention has avoided the oil gun sleeve pipe to be in washing away of pulverized coal particle for a long time, the problem that easily causes the wearing and tearing of main oil gun sleeve pipe to cause little oil drop fire to start, and the tiny-oil ignition device does not change the low NOx and the steady combustion characteristic of burner itself; The present invention utilizes block and changes combustion-chamber shape and improved the coal powder density of first-stage burning chamber, help coal powder ignition, easy scaling loss in combustion chamber and gas fume of combustion chamber blocking problem when combustion chamber, the second level adopts the clearance type structure to solve the employing composite chamber need the firing coal-dust amount to cause the problem of loss of ignition greatly easily when utilizing composite chamber to solve the application on the heavy duty boiler.This burner uses at the normal main burner that can be used as in service of boiler.Because secondary wind enters separated into two parts behind the burner by secondary air box, they are respectively through secondary air duct air-supply in the outer secondary air duct of burner, the burner, 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, outer cyclone, 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, also saved a large amount of fuel oils simultaneously.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention, and Fig. 2 is the A-A cutaway view of Fig. 1, and Fig. 3 is coal dust coal powder density distribution schematic diagram behind inspissator, and wherein C is the coal powder density at measuring point place, C
0Be average coal powder density; R is the radius at measuring point place, R
0It is the radius of an airduct.
The specific embodiment
The specific embodiment one: (referring to Fig. 1～Fig. 2) present embodiment comprises air channel 1 of burner, concentrate ring 2, gripper shoe 3, interior cyclone 4, interior secondary wind air channel 5, outer cyclone 6, outer secondary wind air channel 7, nozzles 8, support bar 9, third level combustion chamber 10, combustion chamber, the second level 11, first-stage burning chamber 12, main oil gun 15, block 16, first wind channel tube 17, second wind channel tube 18 and the 3rd wind channel tube 19, in first wind channel tube 17 is air channel 1 of burner, the port of export of first wind channel tube 17 is nozzles 8, gripper shoe 3 is fixed on the arrival end in first wind channel tube 17, concentrating ring 2 is fixed on the gripper shoe 3, first-stage burning chamber 12 is fixed in first wind channel tube 17 of gripper shoe 3 front ends, combustion chamber, the second level 11 is fixed in first wind channel tube 17 of first-stage burning chamber 12 front ends, in first wind channel tube 17 of 11 front sides, combustion chamber, the second level is third level combustion chamber 10, air channel 1 of main oil gun 15 and burner is connected, the port of export of main oil gun 15 is corresponding with the arrival end of first-stage burning chamber 12, second wind channel tube 18 is fixed on the front end of first wind channel tube, 17 outer surfaces, it between second wind channel tube 18 and first wind channel tube 17 interior secondary wind air channel 5, interior cyclone 4 is fixed in the interior secondary wind air channel 5, the 3rd wind channel tube 19 is fixed on the front end of second wind channel tube, 18 outer surfaces, it between the 3rd wind channel tube 19 and second wind channel tube 18 outer secondary wind air channel 7, outer cyclone 6 is fixed in the outer secondary wind air channel 7, first wind channel tube 17, the front end of second wind channel tube 18 and the 3rd wind channel tube 19 is interconnected by support bar 9, block 16 is fixed on the inwall of first wind channel tube 17 of 12 rear ends, first-stage burning chamber, combustion chamber, the second level 11 comprises upper plate 11-1 and lower plate 11-2, fixedly connected with the upper inside walls of first wind channel tube 17 in the upper end of upper plate 11-1, fixedly connected with the downside inwall of first wind channel tube 17 in the lower end of lower plate 11-2, upper plate 11-1 and lower plate 11-2 are symmetrical arranged in first wind channel tube 17, are provided with slit 11-3 between the upper end of the lower end of upper plate 11-1 and lower plate 11-2.
The specific embodiment two:.(difference referring to the present embodiment of Fig. 1～Fig. 2) and the specific embodiment one is, it has increased auxiliary oil gun 13, auxiliary oil gun 13 be arranged in parallel with main oil gun 15, auxiliary oil gun 13 is connected with first-stage burning chamber 12, and the port of export of auxiliary oil gun 13 is arranged on the middle part of first-stage burning chamber 12.Other is identical with the specific embodiment one.
The specific embodiment three: (difference referring to the present embodiment of Fig. 1～Fig. 2) and the specific embodiment two is, it has increased fire monitor equipment 14, fire monitor equipment 14 is arranged between auxiliary oil gun 13 and the main oil gun 15, and fire monitor equipment 14 is connected with first-stage burning chamber 12.Other is identical with the specific embodiment two.
Coal dust is admitted in air channel 1 of burner, carry out Pulverized Coal Concentration through pulverized coal concentrator 2, form higher coal powder density in 1 central area, an air channel of burner, the CONCENTRATION DISTRIBUTION result who calculates the 600MW subcritical boiler with fluent software is as (shown in Figure 3), and the coal dust area with high mercury is the 0.6R in the center of circle at 1 center, an air channel
0In, remainder is the thin powdered coal air-flow.Before 12 inlets of first-stage burning chamber block is set, has blocked part thin powdered coal air-flow, dog height a is less than 0.4R
0, first-stage burning chamber 12 coal powder densities are improved, along air channel 1 a radial direction 0.15R
0To 0.6R
0The high concentration pulverized coal of annular region 1/4 enter first-stage burning chamber 12, the thermal-flame that main oil gun 15 forms directly contacts with the thick coal culm particle in the first-stage burning chamber 12 characteristic of pulverized coal particle is changed, the high rate of heat addition is accelerated the fugitive constituent speed of separating out greatly, the sharply rising of pulverized coal particle temperature, explosion, pulverizing and violent burning, when flame instability, can in time enable auxiliary oil gun 13, help coal dust firing.Being lighted the high temperature breeze airflow then enters combustion chamber, the second level 11 and contacts and light combustion chamber, the second level 11 coal dusts with the pulverized coal particle of combustion chamber, the second level, combustion chamber, the second level 11 produces the resistance that exhaust gas volumn causes greatly for open gap structure has reduced coal dust firing, and this part heat has heated the coal dust in the outside, combustion chamber, the second level, easier being lighted when making coal dust enter third level combustion chamber, enter third level combustion chamber at last and light remaining coal dust, realized the fractional combustion of coal dust, burning capacity is amplified step by step, sprays into burner hearth through nozzles 8 at last.Gripper shoe 3 is used for fixing to concentrate encircles secondary wind air channel 5 and outer secondary wind air channel 7 in support bar 9 is used for fixing.Secondary wind enters separated into two parts behind the burner by secondary air box, they are respectively through secondary air duct 5 air-supplies in the outer secondary air duct 7 of burner, the burner, 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 4, outer cyclone 6, 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.
Claims (3)
1, a kind of small oil mass gasification combustion side direction multilevel open type igniting center powder-feeding swirling burner, it comprises an air channel of burner (1), concentrate ring (2), gripper shoe (3), interior cyclone (4), interior secondary wind air channel (5), outer cyclone (6), outer secondary wind air channel (7), nozzles (8), support bar (9), third level combustion chamber (10), combustion chamber, the second level (11), first-stage burning chamber (12), main oil gun (15), block (16), first wind channel tube (17), second wind channel tube (18) and the 3rd wind channel tube (19), in first wind channel tube (17) is an air channel of burner (1), the port of export of first wind channel tube (17) is nozzles (8), it is characterized in that: gripper shoe (3) is fixed on the arrival end in first wind channel tube (17), concentrating ring (2) is fixed on the gripper shoe (3), first-stage burning chamber (12) is fixed in first wind channel tube (17) of gripper shoe (3) front end, combustion chamber, the second level (11) is fixed in first wind channel tube (17) of first-stage burning chamber (12) front end, in first wind channel tube (17) of front side, combustion chamber, the second level (11) is third level combustion chamber (10), main oil gun (15) is connected with an air channel of burner (1), the port of export of main oil gun (15) is corresponding with the arrival end of first-stage burning chamber (12), second wind channel tube (18) is fixed on the front end of first wind channel tube (17) outer surface, be interior secondary wind air channel (5) between second wind channel tube (18) and first wind channel tube (17), interior cyclone (4) is fixed in the interior secondary wind air channel (5), the 3rd wind channel tube (19) is fixed on the front end of second wind channel tube (18) outer surface, be outer secondary wind air channel (7) between the 3rd wind channel tube (19) and second wind channel tube (18), outer cyclone (6) is fixed in the outer secondary wind air channel (7), first wind channel tube (17), the front end of second wind channel tube (18) and the 3rd wind channel tube (19) is interconnected by support bar (9), block (16) is fixed on the inwall of first wind channel tube (17) of rear end, first-stage burning chamber (12), combustion chamber, the second level (11) comprises upper plate (11-1) and lower plate (11-2), fixedly connected with the upper inside walls of first wind channel tube (17) in the upper end of upper plate (11-1), fixedly connected with the downside inwall of first wind channel tube (17) in the lower end of lower plate (11-2), upper plate (11-1) and lower plate (11-2) are symmetrical arranged in first wind channel tube (17), are provided with slit (11-3) between the upper end of the lower end of upper plate (11-1) and lower plate (11-2).
2, small oil mass gasification combustion side direction multilevel open type igniting according to claim 1 center powder-feeding swirling burner, it is characterized in that: turbulent burner also comprises auxiliary oil gun (13), auxiliary oil gun (13) be arranged in parallel with main oil gun (15), auxiliary oil gun (13) is connected with first-stage burning chamber (12), and the port of export of auxiliary oil gun (13) is arranged on the middle part of first-stage burning chamber (12).
3, small oil mass gasification combustion side direction multilevel open type igniting according to claim 2 center powder-feeding swirling burner, it is characterized in that: turbulent burner also comprises fire monitor equipment (14), fire monitor equipment (14) is arranged between auxiliary oil gun (13) and the main oil gun (15), and fire monitor equipment (14) is connected with first-stage burning chamber (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064783A CN100585276C (en) | 2008-06-20 | 2008-06-20 | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064783A CN100585276C (en) | 2008-06-20 | 2008-06-20 | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion |
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| Publication Number | Publication Date |
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| CN101329064A true CN101329064A (en) | 2008-12-24 |
| CN100585276C CN100585276C (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810064783A Expired - Fee Related CN100585276C (en) | 2008-06-20 | 2008-06-20 | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679339A (en) * | 2012-06-05 | 2012-09-19 | 唐山市金沙工贸有限公司 | Pulverized coal burner |
| CN103868059A (en) * | 2014-03-24 | 2014-06-18 | 王龙陵 | High-temperature pure oxygen oil gun device for utility boiler automatic stable combustion |
| CN110360544A (en) * | 2019-08-09 | 2019-10-22 | 郑州釜鼎热能技术有限公司 | A kind of low nitrogen combustion apparatus of coal dust gasification and Staged Premixed Combustion |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2954659B2 (en) * | 1990-05-21 | 1999-09-27 | バブコツク日立株式会社 | Pulverized coal burner |
| CN1687641A (en) * | 2005-04-30 | 2005-10-26 | 傅宁娟 | Cold static ignition under meagre coal and tiny oil, and steady burning burner in ultra low load |
| CN2854368Y (en) * | 2005-12-23 | 2007-01-03 | 郭秀峰 | Micro-oil ignition burner for multiple type of coal |
| CN1912462A (en) * | 2006-08-23 | 2007-02-14 | 傅宁娟 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
| CN100453902C (en) * | 2007-02-07 | 2009-01-21 | 鞠胤红 | Smokeless coal gasification micro grease gun igniting pulverized coal burner |
| CN100532937C (en) * | 2007-07-27 | 2009-08-26 | 哈尔滨工业大学 | Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding |
-
2008
- 2008-06-20 CN CN200810064783A patent/CN100585276C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679339A (en) * | 2012-06-05 | 2012-09-19 | 唐山市金沙工贸有限公司 | Pulverized coal burner |
| CN102679339B (en) * | 2012-06-05 | 2014-05-07 | 唐山市金沙工贸有限公司 | Pulverized coal burner |
| CN103868059A (en) * | 2014-03-24 | 2014-06-18 | 王龙陵 | High-temperature pure oxygen oil gun device for utility boiler automatic stable combustion |
| CN110360544A (en) * | 2019-08-09 | 2019-10-22 | 郑州釜鼎热能技术有限公司 | A kind of low nitrogen combustion apparatus of coal dust gasification and Staged Premixed Combustion |
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| Publication number | Publication date |
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| CN100585276C (en) | 2010-01-27 |
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Granted publication date: 20100127 Termination date: 20120620 |