CN200975674Y - Gas recombustion and two-channel Thick-light integrated type low NOx Combusting device - Google Patents
Gas recombustion and two-channel Thick-light integrated type low NOx Combusting device Download PDFInfo
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- CN200975674Y CN200975674Y CN 200620045254 CN200620045254U CN200975674Y CN 200975674 Y CN200975674 Y CN 200975674Y CN 200620045254 CN200620045254 CN 200620045254 CN 200620045254 U CN200620045254 U CN 200620045254U CN 200975674 Y CN200975674 Y CN 200975674Y
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Abstract
The utility model relates to a gas reburning and twin channel strong and weak integrated inflamer with low Nox, consisting of seven air blowers and seven fuel burners which are crossly arranged; Each air blower is connected with a bellows, a groove big bellows provides wind, and each fuel burner is connected with respective fuel system through the bellows. The seven fuel burners arraying in correct order from top to bottom are: gas burner, twin channel coal dust nozzle with weak in the top strong in the bottom, twin channel coal dust nozzle with strong in the top weak in the bottom, and three double channel horizontal concentrated diluted coal dust nozzles (which are strong to the fire direction), the gas burner is arranged at the internal of the air blower at the bottom. Each coal dust nozzle is connected with the separated separator at the back end; the separator is in louver style or elbow style. The gas burner has two roads, each road is evenly provided with air cascading holes; all nozzles can be moved up and down by 30 degrees. The utility model realizes the low discharging of Nox when the coal dust burning, the discharge amount can reach below 190mg/m<3>.
Description
Technical field
The utility model relates to a kind of gas reburning and the deep or light integrated type low NOx combusting of binary channels, belongs to the new burner of energy field.
Background technology
At present, the thermal power plant mainly is based on combusting coal fines, coal dust firing is to carry out in stove, the burning liberated heat changes into heat energy and passes to working-medium water, the overheated one-tenth steam of water promotes the steam turbine generator generating, coal burner is one of core component in the boiler, China's coal for power generation with very big difference is abroad arranged, mainly be ash-rich soft coal, high moisture content brown coal, meager coal, anthracite and sulphur coal, therefore in burning of coal, will guaranteeing safety, economic, reliable situation decline low NOx drainage.Along with the international market fuel price skyrockets, raising thermal power plant coal-burning boiler surely fires, fuel-economizing, also is crucial.Angle control NOx from burning discharges at present, the burning of hypoxemia amount is arranged, flue gas recirculation, fractional combustion and low NOx combustion etc., therefore last lower channel shade burner has appearred, coal burners such as horizontal binary channels shade burner and coal burning and gas burning are combined, though these combustion technologies of single use are surely fired at coal-burning boiler, good effect has been brought into play in the fuel-economizing aspect, but aspect reduction NOx, last lower channel shade burner and horizontal binary channels shade burner, can only reduce 30%-50%NOx, the reducible 50%--70%NOx of the combined coal burner of coal burning and gas burning does not reach the discharge standard of present developed country.
The utility model content
For overcoming above-mentioned shortcoming, the utility model provides gas reburning and the deep or light integrated type low NOx combusting of binary channels of the surely combustion of a kind of thermal power plant, fuel-economizing, adjustable, drastic reduction NOx, makes that the NOx discharging reaches the environmental emission standard 200mg/m of world today developed country in the power plant boiler flue gas
3Below.
The utility model is to adopt coal-fired and combustion gas combined structure in the primary zone of boiler, coal burning system adopts binary channels horizontal bias and binary channels deep or light integrated-type up and down, binary channels is dense light integrated-type down on the light dense down and binary channels on the deep or light employing binary channels up and down, this makes up integrated morphology, not only can realize light a fire fuel-economizing, low-load combustion-stabilizing, and sectional reduces NOx continuously, NOx can be reduced 30%-50% by the binary channels dense-dilute burner combustion technology, remaining NOx can (top) adopt the gaseous fuel reduction in the reburning zone.Its reduction mechanism is as follows:
NOx+CHx→CN+NH
2+H
2O
NOx+CN→N
2+CO
NOx+CO→N
2+CO
2
The deep or light integrated type low NOx combusting of gas reburning and binary channels, it comprises 7 air nozzles and 7 fuel nozzles.7 fuel nozzles are by 1 gas nozzle, 5 coal-fired nozzles and 1 fuel nozzle are formed, 7 air nozzles and 7 fuel nozzle interlaced arrangement, all nozzles all hang and are inserted in the big groove body, there are big bellows the groove body back, each air nozzle is connected with bellows, each fuel nozzle all passes the same fuel system separately of bellows and connects, be characterized in: 7 fuel nozzles are arranged in order from top to bottom and are gas nozzle, light thick coal culm nozzle down on the binary channels, dense thin powdered coal nozzle and 3 binary channels horizontal bias coal nozzles down on the binary channels, fuel nozzle places air nozzle bottom.Each coal-fired nozzle back connects a binary channels bias pulverized coal separator.
Gas nozzle is two rows, the uniform gas jet hole that has of every row, and its open amount increases with the increase of gas flow.
On the binary channels on light down dense nozzle or the binary channels dense light nozzle down waist wind is set between two passages, regulate the recirculating zone size and the position makes flame location adjustable by waist wind.
The side of waring oneself in front of a fire of binary channels horizontal bias nozzle is a concentrated phase.
Separator is venetian blind type or elbow type, and separator type is looked field condition and determined.
All burner noz(zle)s, air nozzle all can up and down between 30 ° of degree swing adjustable.
Binary channels is the bias pulverized coal nozzle up and down, adopts light dense down and last dense light mode down, makes concentrated phase concentrated relatively, more helps the NOx reduction; Two passage stagger arrangement arrange, and the centre is provided with two waist wind and regulates flame location, make coal dust firing more abundant; The gas bag that uses is drawn together gaseous fuels such as natural gas, town gas, heating gas, blast furnace gas, as reducing agent, sprays into burner hearth on coal burner top, the NOx reduction that the bottom coal dust firing is produced, and sectional reduces NOx.
The utility model structure not only can realize light a fire fuel-economizing, low-load combustion-stabilizing, and sectional reduces NOx continuously, makes the NOx discharge capacity reach the strictest international standard 190mg/m at present
3Below.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further details.
Fig. 1 is the utility model gas reburning and the deep or light integrated type low NOx combusting structure side of binary channels view;
Fig. 2 is the deep or light integrated type low NOx combusting structural front view of the utility model gas reburning and binary channels;
Fig. 3 is the gas nozzle front view;
Fig. 4 is last light dense binary channels bias pulverized coal nozzle front view down;
Fig. 5 is last dense light binary channels bias pulverized coal nozzle front view down;
Fig. 6 is a binary channels horizontal bias coal nozzle front view (side of waring oneself in front of a fire is a concentrated phase).
Fig. 7 is light dense binary channels bias pulverized coal nozzle and a louver separator structure side view down on the utility model;
Fig. 8 is dense light binary channels bias pulverized coal nozzle and a louver separator structure side view down on the utility model;
Fig. 9 is binary channels horizontal bias coal nozzle and binary channels louver separator plan structure schematic diagram;
Figure 10 is a binary channels venetian blind type formula cyclone separator arrangement schematic diagram.
Figure 11 is a binary channels elbow type cyclone separator arrangement schematic diagram.
1. air nozzle, 2. gas nozzle, 3. go up dense light binary channels coal nozzle, 5. binary channels horizontal bias coal nozzle, 6. fuel nozzle down on the light dense binary channels coal nozzle 4. down, 7. be with the air nozzle of fuel nozzle, 8. go up light dense binary channels coal dust classifier down, 9. go up dense light binary channels coal dust classifier, 10. binary channels horizontal bias coal dust classifier down, 11. thick coal culm, 12. thin powdered coal, 13. binary channels elbow type separators, 14. dividing plates, 15. barrier type baffle plate, 16. curved baffle, 17. turn to roll bending, 18. big groove bodies, 19. waist wind passage, 20. waist wind blast pipes.
The specific embodiment
Embodiment 1:
The deep or light integrated type low NOx combusting of gas reburning and binary channels has 14 nozzles, and it comprises 7 air nozzles and 7 fuel nozzles.Fuel nozzle is by 1 gas nozzle, 5 coal-fired nozzles and 1 fuel nozzle are formed, 7 air nozzles and 7 fuel nozzle interlaced arrangement are arranged in order from top to bottom and are air nozzle 1, gas nozzle 2, air nozzle 1, last light dense binary channels coal nozzle 3 down, air nozzle 1, last dense light binary channels coal nozzle 4 down, air nozzle 1, binary channels horizontal bias coal nozzle 5, air nozzle 1, binary channels horizontal bias coal nozzle 5, air nozzle 1, binary channels horizontal bias coal nozzle 5, the air nozzle 7 of band fuel nozzle, fuel nozzle 6 is placed in the air nozzle 7 of band fuel nozzle; Coal-fired nozzle back all connects a binary channels venetian blind type coal dust classifier, last light dense binary channels coal dust classifier 8 down, its dividing plate 14 is divided into upper and lower two passages with coal-fired nozzle, the barrier type baffle plate 15 that has certain angle forms the venetian blind type structure, last light dense binary channels coal dust classifier down is divided into last light dense two passages down, after the separated device of breeze airflow was separated into thin powdered coal and thick coal culm, the nozzle through upper and lower two passages sprayed respectively; Last dense following light binary channels coal dust classifier 9 structures are identical with last light following dense binary channels coal dust classifier 8 structures, and just the integral inclination direction of barrier type baffle plate 15 is opposite; By adjusting the angle of inclination of barrier type baffle plate 15 each barrier, can obtain different concentrated ratios, thereby adapt to different coals and different boiler combustion loads.Upper and lower two passage stagger arrangement arrange, and the centre is provided with two waist wind passages 19, regulate flame location, and waist wind passage 19 is connected with waist wind blast pipe 20; Binary channels horizontal bias coal dust classifier 10, be dividing plate is divided into along channel direction about two passages, be concentrated phase design coal dust classifier by the side of waring oneself in front of a fire; Gas nozzle 2 is two to arrange the uniform gas jet hole of Φ 10-Φ 15, its open amount increases with the increase of gas flow, 14 outstanding being inserted in the big groove body 16 of nozzle, there are big bellows the groove body back, bellows are connected with each air nozzle, and gas nozzle, coal-fired nozzle and fuel nozzle all pass the same fuel system separately of bellows and be connected; All fuel nozzles, air nozzle all can about ± 30 ° between the swing adjustable.The air nozzle and the jet for gas of burner bottom equidistantly distribute, it is different with the coal of being burnt and different that its spacing is looked the capacity of unit, and the distance of two air nozzles is bigger than the spacing between coal nozzle and the air nozzle about the gas nozzle distance on burner top.Gas nozzle is fixed, and its center line and horizontal line angle are 0-10 °.Nozzle exit is equipped with expansion oplate and homogenizing plate, and its degree of depth is decided on concrete structure.
Embodiment 2:
The present embodiment structure is substantially the same manner as Example 1, and unique difference is: separator is selected binary channels elbow type separator for use.Be characterized in: in the breeze airflow porch of elbow, the curved baffle 13 that one projection is arranged, between coal nozzle and binary channels elbow type separator, connect one 90 ° and turn to roll bending 14, binary channels elbow type separator is separated into two passages, after breeze airflow enters separator, curved baffle 13 extruding by projection enter the elbow, centrifugal force by coal dust self is separated into thick coal culm and thin powdered coal air-flow, be connected by one again and turn to roll bending 14 between coal nozzle and the separator, be separated into thick coal culm air-flow 15 and thin powdered coal air-flow 16, from two outlet ejections of coal nozzle.The depth-adjustment of curved baffle 13 joint obtaining different concentrated ratios, thereby adapts to different coals and different boiler combustion loads.Separator type is looked field condition and is determined, in actual boiler uses, as is subjected to the restriction of site condition, the binary channels elbow type separator that can select for use structure relatively simply to take up space little; Allow as site condition, can select the high louver separator of thickening efficiency for use.Can select one or more binary channels elbow type separators at the different parts of burner, also can all select binary channels elbow type separator for use.
The utility model structure not only can realize light a fire fuel-economizing, low-load combustion-stabilizing, and sectional reduces NOx continuously, makes the NOx discharge capacity reach the strictest international standard 190mg/m at present
3Below.
Claims (6)
1. the deep or light integrated-type of gas reburning and binary channels hangs down the Nox burner, it comprises 7 air nozzles and 7 fuel nozzles, 7 fuel nozzles are by 1 gas nozzle, 5 coal-fired nozzles and 1 fuel nozzle are formed, 7 air nozzles and 7 fuel nozzle interlaced arrangement, all nozzles all hang and are inserted in the big groove body, there are big bellows the groove body back, each air nozzle is connected with bellows, each fuel nozzle all passes the same fuel system separately of bellows and connects, it is characterized in that: 7 fuel nozzles are arranged in order from top to bottom and are gas nozzle, light thick coal culm nozzle down on the binary channels, dense thin powdered coal nozzle and 3 binary channels horizontal bias coal nozzles down on the binary channels, fuel nozzle places air nozzle bottom, and the back of each coal-fired nozzle connects a binary channels bias pulverized coal separator.
2. gas reburning according to claim 1 and the deep or light integrated-type of binary channels hang down the Nox burner, and it is characterized in that: gas nozzle is two rows, the uniform gas jet hole that has of every row, and its open amount increases with the increase of gas flow.
3. gas reburning according to claim 1 and the deep or light integrated-type of binary channels hang down the Nox burner, it is characterized in that: on the binary channels on light down dense nozzle or the binary channels dense light nozzle down waist wind is set between two passages, regulate the recirculating zone size and the position makes flame location adjustable by waist wind.
4. gas reburning according to claim 1 and the deep or light integrated-type of binary channels hang down the Nox burner, and it is characterized in that: the side of waring oneself in front of a fire of binary channels horizontal bias nozzle is a concentrated phase.
5. according to described gas reburning of claim 1 and the low Nox burner of the deep or light integrated-type of binary channels, it is characterized in that: separator is venetian blind type or elbow type, and separator type is looked field condition and determined.
6. gas reburning according to claim 1 and the deep or light integrated-type of binary channels hang down the Nox burner, it is characterized in that: all nozzles all can up and down between 30 ° of degree swing adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620045254 CN200975674Y (en) | 2006-08-29 | 2006-08-29 | Gas recombustion and two-channel Thick-light integrated type low NOx Combusting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620045254 CN200975674Y (en) | 2006-08-29 | 2006-08-29 | Gas recombustion and two-channel Thick-light integrated type low NOx Combusting device |
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| CN200975674Y true CN200975674Y (en) | 2007-11-14 |
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| CN 200620045254 Expired - Fee Related CN200975674Y (en) | 2006-08-29 | 2006-08-29 | Gas recombustion and two-channel Thick-light integrated type low NOx Combusting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017149A (en) * | 2012-12-28 | 2013-04-03 | 北京哈宜节能环保科技开发有限公司 | Pulverized coal combustion apparatus |
| CN104329669A (en) * | 2014-10-15 | 2015-02-04 | 上海发电设备成套设计研究院 | Bitangent circular thick and thin separation adjustable direct-current coal powder combustor |
-
2006
- 2006-08-29 CN CN 200620045254 patent/CN200975674Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017149A (en) * | 2012-12-28 | 2013-04-03 | 北京哈宜节能环保科技开发有限公司 | Pulverized coal combustion apparatus |
| CN104329669A (en) * | 2014-10-15 | 2015-02-04 | 上海发电设备成套设计研究院 | Bitangent circular thick and thin separation adjustable direct-current coal powder combustor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20100829 |