CN213746732U - Low-nitrogen gas burner suitable for high gas pressure - Google Patents
Low-nitrogen gas burner suitable for high gas pressure Download PDFInfo
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- CN213746732U CN213746732U CN202022720805.7U CN202022720805U CN213746732U CN 213746732 U CN213746732 U CN 213746732U CN 202022720805 U CN202022720805 U CN 202022720805U CN 213746732 U CN213746732 U CN 213746732U
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Abstract
The utility model discloses a low nitrogen gas burner suitable for high gas pressure, the utility model discloses a combustion-supporting air divides the second grade blowout through whirl dryer and combustor case shell, and gaseous fuel is through central fuel section of thick bamboo, the annular fuel section of thick bamboo of circle once and the annular fuel section of thick bamboo of circle of secondary divide tertiary and combustion-supporting gas mixture, thereby make gaseous fuel and combustion-supporting air realize the homogeneous mixing, with control NOx's formation, simultaneously on the one hand because high gas pressure injection velocity is higher, the mat backward flow flue gas ability is stronger, the flue gas that the burning spout is not burnt is mixed with the air from burning flaring flue gas mat hole backward flow in the combustor, participate in the burning. Internal circulation of flue gas in the flaring is formed, and NOx generated at the root of combustion is reduced.
Description
Technical Field
The utility model belongs to the clean burning field of ultralow nitrogen, concretely relates to low nitrogen gas burner suitable for high gas pressure.
Background
In recent years, the demand and price of energy are rising, the energy supply is relatively tight, the problem of energy gap is becoming more and more obvious, and the global environmental problems are becoming more and more prominent, such as the problems of climate warming, acid rain and photochemical smog, so that the environmental problems are getting more and more social attention.
The gas fuel has the characteristics of higher combustion efficiency, low pollution emission and the like, so the gas fuel is widely applied to industrial furnaces (kilns) and boilers in the industries of electric power, chemical engineering, metallurgy, building materials and the like as clean energy. Research on gas burners, which are key devices, has been progressing. But its research has focused primarily on improving the performance of the combustor. And much less attention has been paid to the control of contaminants.
At present, because the industrial gas pressure is higher (the gas pressure is more than 0.5MPa), the low-nitrogen gas burner matched with the gas boiler with high gas pressure is subjected to forced pressure reduction, the gas is sent into the burner after being subjected to pressure reduction, and the matched flue gas is circulated externally, so that the low nitrogen is realized, and the environmental protection requirement is met. And the high gas pressure is directly sent into the combustor to realize that less low-nitrogen equipment is needed, and the low-nitrogen equipment needs to be matched with flue gas external circulation, so that the problems of poor load adjustability, poor combustion stability, high nitrogen oxide emission and the like exist. After 2018, the standards are set out from various places, and the NOx emission mass concentration control standard of all gas boilers is reduced to 50mg/m3(Standard, 3.5% O)2). With the increasing strictness of environmental standards, the environmental modification of such gas boilers is in need.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a low nitrogen gas burner suitable for high gas pressure, this combustor has that stability is strong, combustion efficiency is high, the characteristics of low nitrogen oxide emission.
In order to achieve the purpose, the utility model discloses a central fuel section of thick bamboo, central fuel section of thick bamboo one end is provided with the whirl dryer, it is regional to form annular interior whirl wind between a central fuel section of thick bamboo and the whirl dryer, the whirl dryer is provided with the direct current dryer outward, form the direct current wind passageway between whirl dryer and the direct current dryer, the direct current wind passageway is provided with the flaring of burning outward, be provided with a ring shape fuel section of thick bamboo in the flaring of burning, the flaring of burning is provided with the ring shape fuel section of thick bamboo of secondary outward, the flaring surface of burning has set up a plurality of flue gas mat holes along circumference.
The central fuel cylinder is provided with a central fuel inlet.
The primary annular fuel cylinder is connected with a primary fuel gas-collecting ring, and a primary fuel inlet is formed in the primary fuel gas-collecting ring.
The secondary annular fuel cylinder is connected with a secondary fuel gas-collecting ring, and a secondary fuel inlet is formed in the secondary fuel gas-collecting ring.
The axial nozzles and the radial nozzles are uniformly distributed along the annular shape of the primary annular fuel cylinder, the diameter of the axial nozzles is less than 10mm, and the diameter of the radial nozzles is less than 6 mm.
A plurality of nozzles with the diameter less than 10mm are uniformly arranged along the annular direction of the primary annular fuel cylinder.
The nozzle on the primary annular fuel cylinder is divided into an axial gas nozzle and a vertical gas nozzle.
The secondary circular fuel cylinder is provided with a gas nozzle.
The included angle between the combustion flaring and the axial direction is A, and A is more than 15 degrees and less than 65 degrees.
Compared with the prior art, the utility model discloses a combustion-supporting air divides the second grade blowout through whirl dryer and combustor case shell, and gas fuel is through central fuel section of thick bamboo, onceThe circular ring-shaped fuel cylinder and the secondary circular ring-shaped fuel cylinder are mixed with combustion-supporting gas in three stages, so that the gas fuel and the combustion-supporting air are uniformly mixed to control the generation of NOx, meanwhile, on one hand, because the high-gas-pressure injection speed is higher (v is more than 180m/s), the mat backflow flue gas capacity is stronger, and flue gas with an unburnt combustion nozzle flows back into a combustor from a combustion flaring flue gas mat hole to be mixed with air to participate in combustion. Internal circulation of flue gas in the flaring is formed, and NOx generated at the root of combustion is reduced. On the other hand, high gas pressure can generate high gas flow velocity, the primary fuel and the secondary fuel are uniformly distributed with a plurality of nozzles along the ring shape, the fuel is uniformly sprayed along the circumferential direction at high speed, the flame length is formed, and a 'barreled' flame frontal surface is formed, so that a local high-temperature area is restrained, and the NOx emission is reduced. Central fuel gun spout is along radial setting, realizes central fuel diffusion co-combustion to the reinforcing surely fires the ability, makes this combustor have the characteristics of high stability, high combustion efficiency and low nitrogen oxide emission, the utility model discloses do not need flue gas extrinsic cycle, stability is strong, combustion efficiency is high, the low nitrogen gas burner of the high gas pressure that low nitrogen oxide discharged, it is less than 50mg/m just to control NOx to discharge mass concentration singly by the combustor3。
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a longitudinal section view of the present invention;
fig. 3 is a schematic structural view of a combustion flare in the present invention;
fig. 4 is a schematic structural view of a primary annular fuel cartridge according to the present invention.
FIG. 5 is a schematic structural view of a secondary annular fuel cartridge of the present invention;
wherein, 1 is a combustion-supporting air inlet, 2 is a combustor box shell, 3 is a secondary fuel gas-collecting ring, 4 is a secondary fuel inlet, 5 is a primary fuel gas-collecting ring, 6 is a primary fuel inlet, 7 is a central fuel inlet, 8 is a central fuel cylinder, 9 is a direct current air cylinder, 10 is a rotational flow air cylinder, 11 is a central fuel nozzle, 12 is a flue gas mat hole, 13 is a primary circular fuel cylinder, 14 is a combustion flaring, 15 is a secondary circular fuel cylinder, 13-1 is an axial fuel nozzle, 13-2 is a vertical fuel nozzle, and 15-1 is a fuel nozzle.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 5, the utility model discloses a central fuel section of thick bamboo 8, central fuel entry 7 has been seted up on the central fuel section of thick bamboo 8, 8 one end of central fuel section of thick bamboo is provided with whirl dryer 10, it is regional to form annular interior whirl wind between 8 and the whirl dryer 10 of central fuel section of thick bamboo, whirl dryer 10 is provided with direct current dryer 9 outward, form the direct current wind passageway between whirl dryer 10 and the direct current dryer 9, the direct current wind passageway is provided with the burning flaring 14 outward, be provided with a ring shape fuel section of thick bamboo 13 in the burning flaring 14, the burning flaring 14 is provided with the ring shape fuel section of thick bamboo 15 of secondary outward, 14 surfaces in the burning flaring have set up a plurality of flue gas book seat hole 12 along circumference. The primary annular fuel cylinder 13 is connected with the primary fuel gas-collecting ring 5, and a primary fuel inlet 6 is arranged on the primary fuel gas-collecting ring 5. The secondary circular fuel cylinder 15 is connected with the secondary fuel gas-collecting ring 3, and a secondary fuel inlet 4 is arranged on the secondary fuel gas-collecting ring 3. The primary annular fuel cylinder 13 is uniformly provided with axial nozzles and radial nozzles along the annular direction, the diameter of the axial nozzles is less than 10mm, and the diameter of the radial nozzles is less than 6 mm. The primary annular fuel cylinder 13 is uniformly provided with a plurality of nozzles with the diameter less than 10mm along the annular direction. The nozzles on the primary annular fuel cylinder 13 are divided into an axial gas nozzle 13-1 and a vertical gas nozzle 13-2. The secondary circular fuel cylinder 15 is provided with a gas nozzle 15-1. The included angle between the combustion flaring 14 and the axial direction is A, and A is more than 15 degrees and less than 65 degrees.
During specific operation, combustion-supporting air is sprayed out in two stages through the cyclone air cylinder and the shell of the combustor, gas fuel is mixed with the combustion-supporting air in three stages through the central fuel cylinder, the primary circular ring-shaped fuel cylinder and the secondary circular ring-shaped fuel cylinder, so that the gas fuel and the combustion-supporting air are uniformly mixed to control the generation of NOx, and meanwhile, on one hand, due to the fact that the high-gas-pressure injection speed is high (v is larger than 180m/s), the ability of the mat to return flue gas is strong, and flue gas with unburnt combustion nozzles flows back into the combustor from combustion flaring flue gas mat holes to be mixed with air to participate in combustion. Internal circulation of flue gas in the flaring is formed, and NOx generated at the root of combustion is reduced.
Claims (9)
1. The utility model provides a low nitrogen gas burner suitable for high gas pressure, a serial communication port, including central fuel section of thick bamboo (8), central fuel section of thick bamboo (8) one end is provided with whirl dryer (10), form annular interior whirl wind region between heart fuel section of thick bamboo (8) and whirl dryer (10), whirl dryer (10) are provided with direct current dryer (9) outward, form the direct current wind passageway between whirl dryer (10) and direct current dryer (9), direct current wind passageway is provided with burning flaring (14) outward, be provided with once ring shape fuel section of thick bamboo (13) in burning flaring (14), be provided with secondary ring shape fuel section of thick bamboo (15) outward in burning flaring (14), burning flaring (14) surface has set up a plurality of flue gas book holes (12) along circumference.
2. A low nitrogen gas burner for high gas pressures according to claim 1, characterized in that the central fuel cartridge (8) is provided with a central fuel inlet (7).
3. A low-nitrogen gas burner suitable for high gas pressure as claimed in claim 1, characterized in that the primary annular fuel cylinder (13) is connected to the primary fuel gas-collecting ring (5), and the primary fuel gas-collecting ring (5) is provided with the primary fuel inlet (6).
4. A low-nitrogen gas burner suitable for high gas pressure as claimed in claim 1, characterized in that the secondary annular fuel cylinder (15) is connected to the secondary fuel gas collecting ring (3), and the secondary fuel gas collecting ring (3) is provided with a secondary fuel inlet (4).
5. A low-nitrogen gas burner suitable for high gas pressure, as claimed in claim 1, characterized in that the primary annular fuel cartridge (13) is uniformly arranged with axial ports and radial ports having axial port diameters of less than 10mm and radial port diameters of less than 6mm along the annular shape.
6. A low-nitrogen gas burner for high gas pressures according to claim 1, characterized in that the primary annular fuel cartridges (13) are uniformly arranged with several nozzles with a diameter of less than 10mm in the axial direction along the circle.
7. A low-nitrogen gas burner for high gas pressure, as claimed in claim 6, characterized in that the ports on the primary annular fuel cartridge (13) are divided into axial gas ports (13-1) and vertical gas ports (13-2).
8. The low-nitrogen gas burner suitable for high gas pressure according to claim 1, wherein the secondary annular fuel cylinder (15) is provided with a gas nozzle (15-1).
9. A low-nitrogen gas burner suitable for high gas pressures, according to claim 1, characterized in that the angle of the flaring (14) to the axial direction is a, 15 ° < a < 65 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022720805.7U CN213746732U (en) | 2020-11-23 | 2020-11-23 | Low-nitrogen gas burner suitable for high gas pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022720805.7U CN213746732U (en) | 2020-11-23 | 2020-11-23 | Low-nitrogen gas burner suitable for high gas pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213746732U true CN213746732U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022720805.7U Active CN213746732U (en) | 2020-11-23 | 2020-11-23 | Low-nitrogen gas burner suitable for high gas pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213746732U (en) |
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2020
- 2020-11-23 CN CN202022720805.7U patent/CN213746732U/en active Active
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