CN203718767U - Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner - Google Patents
Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner Download PDFInfo
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- CN203718767U CN203718767U CN201420017296.3U CN201420017296U CN203718767U CN 203718767 U CN203718767 U CN 203718767U CN 201420017296 U CN201420017296 U CN 201420017296U CN 203718767 U CN203718767 U CN 203718767U
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Abstract
An oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner comprises a primary air channel, a multichannel secondary air inlet pipe and an oil/gas burner. A circle of straightener blades are uniformly distributed on the inner wall of an inlet channel of a reinforced combustion chamber in the primary air channel, a circle of swirl blades are uniformly distributed on the outer wall of the front of the oil/gas burner, the distance between the front end of each swirl blade and the front end of the oil/gas burner is larger than or equal to the length of each straightener blade, the outer diameter of each swirl blade is smaller than the inner diameter of each straightener blade, front and rear positions of the oil/gas burner can be adjusted, and relative positions of the swirl blades and the straightener blades can be driven to change. The swirl intensity of secondary air of the burner can be adjusted online, the burner forms a reasonable high-temperature flue gas return flow zone at the center of a nozzle by adjusting the swirl intensity of the secondary air, and stable heat sources for ignition and stable-combustion of pulverized coal are provided. Timely mixing of the secondary air and the pulverized coal is effectively controlled, a water cooled wall zone at the nozzle is positioned in oxidizing atmosphere, and slag-bonding and high-temperature corrosion of a water cooled wall of a burner zone are effectively prevented.
Description
Technical field
The utility model relates to a kind of coal burner, especially a kind of low nitrogen vortex burner of joint oil/gas ignition smooth combustion that is applicable to station boiler.
Background technology
Generating plant pulverized coal boiler generally adopts large oil gun to realize startup and low-load combustion-stabilizing in the world at present.According to statistics, domestic power system reaches nearly ten million ton for Boiler debugging, startup, low-load combustion-stabilizing and blowing out are combustion-supporting with innage every year, accounts for 15% of the total fuel consumption in the whole nation, is worth tens billion of yuans, consumed a large amount of fuel resources, also made cost of electricity-generating greatly improve.Coal resources in China is much abundanter than petroleum and gas resources, and the energy consumption structure that the coal of take is master still can not change in nearly decades.Power industry is the industry that fuel consumption is very large, and reducing fuel consume and reducing cost of electricity-generating is trend of the times.The fuel-economizing firing technique of replace oil with coal develops rapidly in recent years at home, has obtained good effect.
In recent years, along with the attention of people to environmental protection, the discharge that reduces nitrogen oxide became the key technology of running neck and neck with fuel-economizing igniting.But there is the problem of serious wear, spout slagging scorification and high temperature corrosion at present a lot of low NOs, not strong to coal adaptability.
At present with regard to the turbulent burner of wall firing boiler, the application process of fuel-economizing firing technique is that a wind partial demolition of row's turbulent burner is replaced by fuel saving lighting coal powder combustor, and fuel saving lighting coal powder combustor does not have the performance structure of low NO when boiler normally moves, the low nitrogen and the combustion stability that often make to carry out whole row's turbulent burner of fuel-economizing firing technique application decline to some extent.
Utility model content
Technical problem: the purpose of this utility model is for having problems in prior art, provides the low nitrogen vortex burner of joint oil/gas ignition smooth combustion that a kind of simple in structure, coal adaptability is strong, have low-nitrogen oxide discharging.
Technology is asked scheme: the low nitrogen vortex burner of joint oil/gas ignition smooth combustion of the present utility model, comprise wind passage one time, multichannel secondary wind inleting tube, stretch into the oil/gas burner in wind passage one time, a wind passage, the port of export of multichannel secondary wind inleting tube is and expands vertebra structure, in overheavy firing chamber inlet vias inner walls in a described wind passage, be evenly equipped with one and enclose into the straightener(stator) blade that horizontal angle is arranged, on the anterior outer wall of described oil/gas burner, be evenly equipped with one and enclose into the swirl vane that arrange at inclination angle, the front end of swirl vane is more than or equal to the length of straightener(stator) blade apart from the length of oil/gas burner front end, the external diameter of swirl vane is less than the internal diameter of straightener(stator) blade, described multichannel secondary wind inleting tube comprises and is sleeved on the direct-current secondary blast pipe on wind passage excircle one time, the excircle of direct-current secondary blast pipe is provided with inside secondary wind inleting tube in the eddy flow of inward eddy blade is housed, and in eddy flow, the excircle of secondary wind inleting tube is provided with the outer secondary wind inleting tube of eddy flow that outer swirl vane is equipped with in inside, described direct-current secondary blast pipe porch is provided with the direct current air door adjusting rod of damper one air quantity that seesaws, and in described eddy flow, secondary wind inleting tube porch is provided with the eddy flow air door adjusting rod of damper two air quantity that seesaw, described inward eddy blade is provided with axial angle can inward eddy blade adjustments bar, and outer swirl vane is provided with axial angle can outer eddy flow blade adjustments bar.
The outer wall of a described wind passage is provided with and can makes oil/gas burner enter the guide pin bushing moving forward and backward in a wind passage.
Beneficial effect: the utility model burner has the feature of efficient and low-nitrogen oxide discharging, solved the serious wear that at present a lot of low NOs exist, the problem of spout slagging scorification and high temperature corrosion, by air quantity and/or the swirl strength of the adjustable interior outer second air of adjusting rod, on the mixing opportunity of high temperature gases recirculating district, control combustion device spout center and a Secondary Air, can adapt to the ignition and steady combustion requirement of Coal rank.By the fuel oil/air burner of the adjustable overheavy firing of setting position in a wind passage, by adjusting the position of this burner, the low nitrogen vortex burner of envoy's oil/gas ignition smooth combustion is taken into account the characteristic of joint oil/gas and low nitrogen.Swirl strength can on-line control, by regulating the swirl strength of Secondary Air, makes burner in spout, be formed centrally rational high temperature gases recirculating district, and the stable thermal source of coal powder ignition and steady combustion is provided.The spout that burner primary and secondary air place all arranges certain angle expands vertebra structure, can effectively control Secondary Air mixes with the in good time of coal dust, make nozzle water-cooling wall region simultaneously in oxidizing atmosphere, effectively prevent that the slagging scorification of burner region water-cooling wall and high temperature corrosion from occurring.This utility model combustion stability that catches fire is good, and ature of coal strong adaptability has advantages of low-nitrogen oxide discharging simultaneously.It is simple in structure, and coal adaptability is strong, and result of use is good, has in the art practicality widely.
Accompanying drawing explanation
Fig. 1 is burner structure schematic diagram of the present utility model.
Fig. 2 is burner operation process positional structure schematic diagram of the present utility model.
In figure: 1-oil/gas burner, 2-wind passage, 3-inward eddy blade adjustments bar, 4-outer eddy flow blade adjustments bar, 5-eddy flow air door adjusting rod, 6-direct current air door adjusting rod, 7-air door, one, 8-secondary wind inleting tube, 9-air door two, secondary wind inleting tube in 10-eddy flow, 11-inward eddy blade, the outer secondary wind inleting tube of 12-eddy flow, 13-outer swirl vane, 14-swirl vane, 15-straightener(stator) blade, 16-overheavy firing chamber, 17-expansion vertebra.
The specific embodiment
Below in conjunction with accompanying drawing, an embodiment of the present utility model is further described:
The low nitrogen vortex burner of joint oil/gas ignition smooth combustion of the present utility model, mainly consists of secondary wind inleting tube 10, the outer secondary wind inleting tube 12 of eddy flow and swirl vane in oil/gas burner 1, wind passage 2, air door, adjusting rod, secondary wind inleting tube 8, eddy flow.Described oil/gas burner 1 extend in a wind passage 2, the horizontal pipeline section outer wall of a wind passage 2 is provided with and can makes oil/gas burner 1 enter the guide pin bushing moving forward and backward in a wind passage 2, and the axial line of oil/gas burner 1 overlaps with the axial line of the horizontal pipeline section of a wind passage 2.In wind passage 2, secondary wind inleting tube 8, eddy flow, the port of export of secondary wind inleting tube 10, the outer secondary wind inleting tube 12 of eddy flow is and expands vertebra structure, expands vertebra angle and is 30 °.On overheavy firing chamber 16 access road inwalls in a described wind passage 2, be evenly equipped with one and enclose into the straightener(stator) blade 15 that horizontal angle is arranged, on the described anterior outer wall of oil/gas burner 1, be evenly equipped with one and enclose into the swirl vane 14 that arrange at inclination angle, the front end of swirl vane 14 is more than or equal to the length of straightener(stator) blade 15 apart from the length of oil/gas burner 1 front end, the external diameter of swirl vane 14 is less than the internal diameter of straightener(stator) blade 15; Coordinating for moving forward and backward, adjust the moving of relative position between swirl vane 14 and straightener(stator) blade 15 of described oil/gas burner 1 and wind passage 2 porch coordinates, and the distance that oil/gas burner 2 moves forward and backward is greater than the length of straightener(stator) blade 15.Described multichannel secondary wind inleting tube comprises and is sleeved on the direct-current secondary blast pipe 8 on wind passage 2 excircles one time, the excircle of direct-current secondary blast pipe 8 is provided with inside secondary wind inleting tube 10 in the eddy flow of inward eddy blade 11 is housed, and in eddy flow, the excircle of secondary wind inleting tube 10 is provided with the outer secondary wind inleting tube 12 of eddy flow that outer swirl vane 13 is equipped with in inside; Described direct-current secondary blast pipe 8 porch are provided with the direct current air door adjusting rod 6 of damper one 7 air quantity that seesaw, and in described eddy flow, secondary wind inleting tube 10 porch are provided with the eddy flow air door adjusting rod 5 of damper 29 air quantity that seesaw; Described inward eddy blade 11 is provided with axial angle can inward eddy blade adjustments bar 3, and outer swirl vane 13 is provided with axial angle can outer eddy flow blade adjustments bar 4.
Operation principle: the oil/gas burner 1 in the low nitrogen vortex burner of joint oil/gas ignition smooth combustion is arranged in a wind passage 2, the inside and outside Secondary Air of eddy flow all adopts axial angle adjustable vane form, by inward eddy blade adjustments bar 3 and outer eddy flow blade adjustments bar 4, regulate respectively, the inside and outside Secondary Air air quantity of eddy flow ratio drives air door 29 to seesaw by eddy flow air door adjusting rod 5 and realizes adjusting.Direct current inner second air drives the air doors 1 adjusting air quantity that seesaws by direct current air door adjusting rod 6; Adjust the front and back position of oil/gas burner 1, drive swirl vane 14 displacements, thereby drive the variation of relative position between swirl vane 14 and straightener(stator) blade 15.
When boiler cold-state starts, burner is position as shown in Figure 1, oil/gas burner 1 is the state of putting into operation, first primary wind and powder produces and rotatablely moves through swirl vane 14 after entering an air channel 2, from swirl vane 14 out, enter straightener(stator) blade 15, under the rectified action of straightener(stator) blade 15, windward side at straightener(stator) blade 15 forms the multiply dense phase pulverized coal air-flow identical with straightener(stator) blade 15 quantity, at the back side of straightener(stator) blade 15, forms the light phase breeze airflow of multiply.Dense phase pulverized coal air-flow and light phase breeze airflow enter overheavy firing chamber 16, interiorly in overheavy firing chamber 16 spray burner after by the flame ignition of oil/gas burner 2.Now, by direct current air door adjusting rod 6, drive air door one 7 motions, make direct current air quantity larger, the wall of cooling reinforcing combustion chamber, protects its not overtemperature, safe operation.Because coal dust is concentrated phase, light distribution separately, formed and be conducive to reduce the good environment that NOx produces, can greatly reduce the generation of NOx.Overheavy firing chamber 16 is a utmost point narrow space environment with respect to boiler furnace, therefore more than 16 inside, overheavy firing chamber can being warming up to the ignition temperature of coal dust with a small amount of oil/gas flame, realize the joint oil/gas object of coal dust being lighted by a small amount of oil/gas, thereby replace oil with coal/gas, utilize more than the heat of pulverized coal flame is warming up to boiler furnace the ignition temperature of coal dust again, drop into again the coal dust of other coal burner, complete the start-up course of boiler.
After boiler startup process completes, oil/gas burner 1 is shut down condition, oil/gas burner 1 moves forward in overheavy firing chamber 16, position as shown in Figure 2, first primary wind and powder passes through straightener(stator) blade 15 after entering an air channel 2, produces more uniform breeze airflow, and from straightener(stator) blade 15 wind out enters swirl vane 14, generation rotatablely moves, coal dust is dense interior light distribution outside forming under the effect of centrifugal force, and this coal dust distribution mode coordinates the generation that can reduce NOx with Secondary Air.Regulate direct current air door adjusting rod 6 to drive air door one 7 motions, direct current inner second air is reduced; Regulate eddy flow air door adjusting rod 5 to drive air door 29 motions, eddy flow inner second air ratio is reduced, eddy flow outer second air ratio strengthens; Inward eddy blade adjustments bar 3 and outer eddy flow blade adjustments bar 4 make the swirl strength of eddy flow inner second air and eddy flow outer second air all less.Can make like this mixing of Secondary Air and pulverized coal flame weaken, delayed combustion, reduces the generation of NOx.Contrary regulative mode, can improve the swirl strength of whole air-flow, the mixing of strengthening coal dust and air, and strengthening burning in early stage, is reduced fly ash combustible material, improves efficiency of combustion.By debugging adjusting rod, reduce or strengthen distinguished and admirable strong and weak two kinds of modes, can find the best ideal point of balance NOx and fly ash combustible material.
First and second air channel spout is and expands vertebra 7 structures, the expansion vertebra angle of expanding vertebra 7 is 30 °, by extending out structure, make the Mixed Delay of primary and secondary air, make burner nozzle region form the flow field structure of bellows chamber powder, reach the inner oxygen deficient atmospheres that forms of the initial stage of catching fire wind, the nitrogen oxide at initial stage is fully reduced, utilize the brattice that extends out structure formation to reach the object of isolation pulverized coal particle and spout water-cooling wall region tube panel simultaneously, thereby can effectively alleviate the probability of the coking of burner region water-cooling wall and high temperature corrosion.
Claims (2)
1. one kind is saved the low nitrogen vortex burner of oil/gas ignition smooth combustion, comprise a wind passage (2), multichannel secondary wind inleting tube, stretch into the oil/gas burner (1) in a wind passage (2), a wind passage (2), the port of export of multichannel secondary wind inleting tube is and expands vertebra structure, it is characterized in that: on overheavy firing chamber (16) the access road inwall in a described wind passage (2), be evenly equipped with one and enclose into the straightener(stator) blade (15) that horizontal angle is arranged, on the described anterior outer wall of oil/gas burner (1), be evenly equipped with one and enclose into the swirl vane (14) that arrange at inclination angle, the front end of swirl vane (14) is more than or equal to the length of straightener(stator) blade (15) apart from the length of oil/gas burner (1) front end, the external diameter of swirl vane (14) is less than the internal diameter of straightener(stator) blade (15), described multichannel secondary wind inleting tube comprises the direct-current secondary blast pipe (8) being sleeved on a wind passage (2) excircle, the excircle of direct-current secondary blast pipe (8) is provided with inside secondary wind inleting tube (10) in the eddy flow of inward eddy blade (11) is housed, and in eddy flow, the excircle of secondary wind inleting tube (10) is provided with the outer secondary wind inleting tube (12) of eddy flow that outer swirl vane (13) is equipped with in inside, described direct-current secondary blast pipe (8) porch is provided with the direct current air door adjusting rod (6) of damper one (7) air quantity that seesaws, and in described eddy flow, secondary wind inleting tube (10) porch is provided with the eddy flow air door adjusting rod (5) of damper two (9) air quantity that seesaw, described inward eddy blade (11) is provided with axial angle can inward eddy blade adjustments bar (3), and outer swirl vane (13) is provided with axial angle can outer eddy flow blade adjustments bar (4).
2. the low nitrogen vortex burner of a kind of joint oil/gas ignition smooth combustion according to claim 1, is characterized in that: the outer wall of a described wind passage (2) is provided with and can makes oil/gas burner (1) enter the guide pin bushing moving forward and backward in a wind passage (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017296.3U CN203718767U (en) | 2014-01-13 | 2014-01-13 | Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017296.3U CN203718767U (en) | 2014-01-13 | 2014-01-13 | Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner |
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| CN203718767U true CN203718767U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420017296.3U Expired - Fee Related CN203718767U (en) | 2014-01-13 | 2014-01-13 | Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759258A (en) * | 2014-01-13 | 2014-04-30 | 徐州燃控科技股份有限公司 | Fuel-saving/gas-ignition stable-combustion low-nitrogen swirling pulverized coal combustor |
| CN104764006A (en) * | 2015-04-03 | 2015-07-08 | 南京创能电力科技开发有限公司 | Swirl less-gas pulverized coal burner |
-
2014
- 2014-01-13 CN CN201420017296.3U patent/CN203718767U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759258A (en) * | 2014-01-13 | 2014-04-30 | 徐州燃控科技股份有限公司 | Fuel-saving/gas-ignition stable-combustion low-nitrogen swirling pulverized coal combustor |
| CN103759258B (en) * | 2014-01-13 | 2016-06-15 | 徐州科融环境资源股份有限公司 | A kind of joint low nitrogen vortex burner of oil/gas ignition smooth combustion |
| CN104764006A (en) * | 2015-04-03 | 2015-07-08 | 南京创能电力科技开发有限公司 | Swirl less-gas pulverized coal burner |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee after: XUZHOU KERONG ENVIRONMENTAL RESOURCES CO., LTD. Address before: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee before: Xuzhou Combustion Control Research Institute Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20170113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |