CN2596201Y - Coal burning and gas burning combined low NOx Burner - Google Patents
Coal burning and gas burning combined low NOx Burner Download PDFInfo
- Publication number
- CN2596201Y CN2596201Y CN 02283640 CN02283640U CN2596201Y CN 2596201 Y CN2596201 Y CN 2596201Y CN 02283640 CN02283640 CN 02283640 CN 02283640 U CN02283640 U CN 02283640U CN 2596201 Y CN2596201 Y CN 2596201Y
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- nozzle
- air
- gas
- nozzles
- coal
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Abstract
The utility model relates to a coal burning and gas burning combined type low NOx burner, which is a set of suspending combined nozzles with 14 nozzles, wherein, one of the 14 nozzles is a gas nozzle, five of the 14 nozzles are coal powder nozzles, seven of the 14 nozzles are air nozzles, and one of the 14 nozzles is an oil nozzle. An air nozzle, the gas nozzle, an air nozzle, a coal powder nozzle, an air nozzle, a coal powder nozzle, an air nozzle, a coal powder nozzle, an air nozzle, a coal powder nozzle and an air nozzle are downwards and orderly arranged, and the oil nozzle is arranged on the undermost air nozzle. The nozzles are all arranged in a big slot type body, and the back of the slot type body is provided with a big wind box. The gas nozzle, the coal powder nozzles and the oil nozzle are all penetrated through the wind box to be connected with a gas pipeline and a coal powder pipeline and an oil pipeline. The utility model has the advantages that the structure is simple, the discharge amount of the NOx can decrease 70 percents, and the discharge concentration of the NOx in flue gas is near 200 mg/m#< 3 >.
Description
Technical Field
The utility model relates to a combined low NOx combustor of coal-fired gas belongs to the new burner of energy field.
Background
At present, a thermal generator set mainly burns pulverized coal, that is, coal is ground into powdery fuel by a coal mill and then sent into a boiler to be burnt under the carrying of hot air. The chemical energy of the fuel is converted into heat energy by combustion and is transferred to the working medium, and the working medium pushes the turbonator to generate electricity. One of the core components in pulverized coal combustion is a pulverized coal burner, which is also one of the core components of a boiler. For many years, many pulverized coal burners have appeared, such as blunt body burners, hull burners, two-channel pulverized coal burners, preheating chamber burners, air shovel type burners, and the like, from the viewpoint of safe, economical, and reliable operation. The novel pulverized coal burners play a great role in improving the stable combustion and saving oil of the coal-fired boiler of the thermal power plant, have more and more strict requirements on the emission of pollutants of the coal-fired boiler of the thermal power plant along with the enhancement of the requirements on environmental protection, and are urgent to reduce the atmospheric pollution caused by the coal-fired boiler. The burner described above does not meet these requirements. The pollutant substances in the flue gas of the coal-fired boiler are mainly dust, SOx, NOx and the like, wherein the NOx control emission technology comprises low-oxygen combustion, flue gas recirculation, staged combustion, low-NOx combustion and the like from the combustion angle. Therefore, the pulverized coal burners such as a rich-lean burner and a two-channel rich-lean burner are correspondingly appeared, the NOx is reduced by 50 percent, but the requirement of the environmental protection standard of developed countries in the world for low NOx is still far from being met, for example, the NOx emission is lower than 200mg/m3。
Disclosure of Invention
The utility model aims at overcoming prior art's weak point, provide a degree of depth and reduce the combined low NOx combustor of coal-fired gas of reduction NOx, make NOx discharge in the boiler flue gas of thermal power plant reach the requirement of the developed national environmental standard in present world to low NOx.
The mechanism of the utility model is to spray the gas fuel including natural gas, coke oven gas and city gas as reducing agent into the hearth on the upper part of the pulverized coal burner, so that the NOx generated by the combustion of the lower pulverized coal is reduced, and the reaction mechanism is as follows: )
the technical scheme of the utility model is realized based on above-mentioned mechanism, and the combined low NOx combustor of coal-fired gas is a set of combination nozzle that suspends in midair, comprises air jet, gas nozzle, coal-fired nozzle and oil nozzle, and the combustor has 14 nozzles altogether, and wherein 1 gas nozzle, 5 buggy nozzle, 7 air jet, 1 oil nozzle, from the top down arrange in proper order: the air nozzle, the gas nozzle, the air nozzle, the pulverized coal nozzle, the oil nozzle are arranged in the lowest air nozzle, all the nozzles are arranged in a large trough body, a large air box is arranged behind the trough body, the air box is connected with all the air nozzles, and the gas nozzle, the pulverized coal nozzle and the oil nozzle penetrate through the air box and are connected with a gas pipeline, a pulverized coal pipeline and an oil pipeline.
According to the scheme, the coal-fired gas combined low NOx burner is simple in structure, NOx emission can be reduced by 70%, and NOx emission concentration in flue gas is close to 200mg/m3。
Drawings
FIG. 1 is a structural side view of a coal-gas combustion combined type low NOx burner,
fig. 2 is a front view of a structure of a coal-gas fired combined type low NOx burner.
Detailed Description
As shown in fig. 1 and 2, the coal-gas combined low NOx burner is a suspended combined nozzle, and comprises 14 nozzles, wherein 1 gas nozzle, 5 pulverized coal nozzle, 7 air nozzles, and 1 oil nozzle are arranged from top to bottom: the air nozzle 1, the air nozzle 2, the air nozzle 3, the coal powder nozzle 4, the air nozzle 5, the coal powder nozzle 6, the air nozzle 7, the coal powder nozzle 8, the air nozzle 9, the coal powder nozzle 10, the air nozzle 11, the coal powder nozzle 12 and the oil nozzle 14 are arranged in the lowest air nozzle 13, all the nozzles are arranged in a large groove body 15, a large air box is arranged behind the groove body and connected with the air nozzles, and the air nozzle, the coal powder nozzle and the oil nozzle penetrate through the air box and are connected with a gas pipeline, a coal powder pipeline and an oil pipeline. As shown in figure 1, the air nozzles and gas nozzles at the lower part of the burner are distributed at equal intervals, the distance between the air nozzles and the gas nozzles at the upper part of the burner is different according to the capacity of theunit and the type of coal to be burned, and the distance between the gas at the upper part of the burner and the lower part of the air nozzles is larger than the distance between the gas nozzles and the air nozzles, and is generally more than 1.0 meter. The coal-fired nozzle and the air nozzle can be swung up by 25 degrees and swung down by 25 degrees; the gas nozzle is fixed, and the included angle between the central line of the gas nozzle and the horizontal line is 0-10 degrees. The outlet of each nozzle is provided with an expansion joint and a flow equalizing plate, and the depth of the expansion joint and the flow equalizing plate is determined according to the specific structure.
Claims (4)
1. The utility model provides a coal-fired gas combined type hangs down NOx combustor which characterized in that, it is a set of combination nozzle that suspends, comprises air nozzle, gas nozzle and oil nozzle, and the combustor has 14 nozzles altogether, and wherein 1 gas nozzle, 5 buggy nozzle, 7 air nozzle, 1 oil nozzle arrange in proper order from the top down: the air nozzle (1), the air nozzle (2), the air nozzle (3), the coal powder nozzle (4), the air nozzle (5), the coal powder nozzle (6), the air nozzle (7), the coal powder nozzle (8), the air nozzle (9), the coal powder nozzle (10), the air nozzle (11), the coal powder nozzle (12), the oil nozzle (14) is placed in the air nozzle (13) at the bottom, all the nozzles are placed in a large groove-shaped body (15), a large air box is arranged behind the groove-shaped body, the air box is connected with the air nozzles, the air nozzle, the coal powder nozzle, the oil nozzle all penetrate through the air box and are connected with an air pipeline, the coal powder pipeline and an oil pipeline.
2. The coal and gas combined low NOx burner of claim 1,wherein the air nozzles and the gas nozzles are equidistantly arranged at the lower portion of the burner, and the distance between the gas nozzle at the upper portion of the burner and the upper and lower air nozzles is greater than the distance between the gas nozzle and the air nozzle.
3. The coal-gas combined low NOx burner of claim 1, wherein the coal-fired nozzle and the air nozzle can be swung up and down by 25 degrees; the gas nozzle is fixed, and the included angle between the central line of the gas nozzle and the horizontal line is 0-10 degrees.
4. The coal and gas combination type low NOx burner of claim 1, wherein an expansion gap and a flow equalizing plate are disposed at each nozzle outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02283640 CN2596201Y (en) | 2002-12-26 | 2002-12-26 | Coal burning and gas burning combined low NOx Burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02283640 CN2596201Y (en) | 2002-12-26 | 2002-12-26 | Coal burning and gas burning combined low NOx Burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2596201Y true CN2596201Y (en) | 2003-12-31 |
Family
ID=33745264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02283640 Expired - Fee Related CN2596201Y (en) | 2002-12-26 | 2002-12-26 | Coal burning and gas burning combined low NOx Burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2596201Y (en) |
-
2002
- 2002-12-26 CN CN 02283640 patent/CN2596201Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |