CN110056875B - Low-nitrogen-emission gas burner - Google Patents
Low-nitrogen-emission gas burner Download PDFInfo
- Publication number
- CN110056875B CN110056875B CN201910340826.5A CN201910340826A CN110056875B CN 110056875 B CN110056875 B CN 110056875B CN 201910340826 A CN201910340826 A CN 201910340826A CN 110056875 B CN110056875 B CN 110056875B
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- gas
- pipe
- combustion cylinder
- gas distribution
- distribution pipe
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- 239000007789 gas Substances 0.000 claims abstract description 153
- 238000002485 combustion reaction Methods 0.000 claims abstract description 63
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002737 fuel gas Substances 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 230000001154 acute effect Effects 0.000 claims description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 27
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
Abstract
The invention discloses a low-nitrogen emission gas burner which comprises a gas inlet pipe, a gas distribution pipe, an ignition rod and a combustion cylinder, wherein a central air pipe is also arranged in the center of the gas inlet pipe; the combustion cylinder comprises an outer combustion cylinder and an inner combustion cylinder; the gas distribution pipe is arranged at the tail part of the gas inlet pipe and comprises a first gas distribution pipe and a second gas distribution pipe, and the head part of the first gas distribution pipe and the head part of the second gas distribution pipe are respectively arranged at two sides of the cyclone disc; the inner combustion cylinder is sleeved on the periphery of the cyclone disc, the outer combustion cylinder is sleeved on the outer portion of the inner combustion cylinder, and a gap is reserved between the inner combustion cylinder and the outer combustion cylinder; a hollow truncated cone-shaped gas distribution cap is fixedly connected and sleeved in the tail end pipe of the gas inlet pipe, a spiral gas outlet is formed in the gas distribution cap, the gas distribution cap penetrates through the cyclone disc, and the central air pipe penetrates through the gas distribution cap; the outer combustion cylinder, the inner combustion cylinder, the cyclone disc, the gas distribution cap, the gas inlet pipe and the central air pipe are coaxially arranged. The invention can mix the fuel gas and air uniformly, burn in layers, burn fully, reduce the temperature of the central flame, and reduce the emission of nitrogen oxide obviously.
Description
Technical Field
The invention relates to a low-nitrogen-emission gas burner, and belongs to the technical field of boiler combustion machinery.
Background
Atmospheric pollution is a hot spot of global concern, and one of the main causes of atmospheric pollution is nitrogen oxide. The nitrogen oxide and other pollutants generate photochemical smog pollution under certain conditions, and great threat is generated to the living environment of human beings. At present, the environmental protection department in China has higher and higher requirements on the emission limit of pollutants generated by combustion. For this reason, reducing nitrogen oxide emissions is one of the main goals of current gas burner designs.
At present, the main technical means for controlling the emission of nitrogen oxides of the gas burner comprise air classification, matching of air rotational flow and direct current air, gas classification, flue gas recirculation and other modes. The reason that the emission of nitrogen oxides of the burner is high at present is that the temperature of the central flame is too high, and the nitrogen oxides are generated only at high temperature, so how to disperse the flame in a limited combustion space and reduce the temperature of the central flame become important considerations for the design of the burner.
Disclosure of Invention
The invention provides a low-nitrogen-emission gas burner for solving the defects of the prior art.
The technical scheme of the invention is as follows: a low-nitrogen emission gas burner comprises a gas inlet pipe, a gas distribution pipe, an ignition rod and a combustion cylinder, wherein a central air pipe is arranged in the center of the gas inlet pipe; the combustion cylinder comprises an outer combustion cylinder and an inner combustion cylinder; the gas distribution pipe is arranged at the tail part of the gas inlet pipe and comprises a first gas distribution pipe and a second gas distribution pipe, the roots of the first gas distribution pipe and the second gas distribution pipe are communicated with the inside of the gas inlet pipe, the head part of the first gas distribution pipe is opened, the head part of the second gas distribution pipe is closed, and the side surface of the second gas distribution pipe is provided with a side gas outlet; a cyclone disc is fixedly connected and sleeved outside the tail end pipe of the gas inlet pipe, the head of the first gas distribution pipe penetrates out of the cyclone disc, the head of the second gas distribution pipe does not penetrate through the cyclone disc, and the head of the first gas distribution pipe and the head of the second gas distribution pipe are respectively arranged on two sides of the cyclone disc; the inner combustion cylinder is sleeved on the periphery of the cyclone disc, the outer combustion cylinder is sleeved on the outer portion of the inner combustion cylinder, and a gap is reserved between the inner combustion cylinder and the outer combustion cylinder; a hollow truncated cone-shaped gas distribution cap is fixedly connected and sleeved in the tail end pipe of the gas inlet pipe, a spiral gas outlet is formed in the gas distribution cap, the gas distribution cap penetrates through the cyclone disc, and the central air pipe penetrates through the gas distribution cap; the outer combustion cylinder, the inner combustion cylinder, the cyclone disc, the gas distribution cap, the gas inlet pipe and the central air pipe are coaxially arranged.
Furthermore, the first air distribution pipe and the second air distribution pipe are uniformly distributed along the radial direction of the tail part of the fuel gas inlet pipe at intervals, and an included angle between the axis of the first air distribution pipe and/or the second air distribution pipe and the axis of the tail part of the fuel gas inlet pipe is an acute angle.
Furthermore, the perpendicular line from the center of the side air outlet of the second air distribution pipe to the axis of the second air distribution pipe is perpendicular to the axis of the gas inlet pipe.
Furthermore, a beveled cyclone opening is formed in the cyclone disc, and an included angle between the air outlet direction of the cyclone opening and the plane of the cyclone disc is an acute angle.
Furthermore, the hollow truncated cone-shaped gas distribution cap comprises a truncated hollow cone and a hollow cylinder, and the hollow cylinder is sleeved at the tail end in the gas inlet pipe.
Further, an included angle between the axial direction of the first air distribution pipe and/or the second air distribution pipe and the axial direction of the tail portion of the fuel gas inlet pipe is 30 degrees.
Furthermore, the included angle between the air outlet direction of the cyclone air opening and the plane of the cyclone disc is 45 degrees.
The invention has the following positive beneficial effects: the combustion cylinder is arranged into an outer combustion cylinder and an inner combustion cylinder, so that the fuel is separately and hierarchically combusted, and the flame temperature is reduced; meanwhile, the gas distribution pipes are arranged into two gas distribution pipes, namely a first gas distribution pipe and a second gas distribution pipe, and the two gas distribution pipes are separated by the cyclone disc, so that layered combustion of the gas is realized; the second gas distribution pipe is positioned at the inner side of the cyclone disc, and adopts a side gas outlet design, so that the gas is spirally sprayed out and combusted; the first air distribution pipe penetrates through the cyclone disc, is positioned on the outer side of the cyclone disc, adopts a head opening and is matched with a beveled cyclone opening on the cyclone disc, so that air and fuel gas are mixed and sprayed spirally and are combusted; the gas distribution cap is designed to be conical, and the conical is provided with the spiral gas outlet hole, so that the central gas can be subjected to spatial layered combustion; the temperature of the central flame can be further reduced by introducing cool air through the central air duct. The invention can mix the fuel gas and air uniformly, burn in layers, burn fully, reduce the temperature of the central flame, and reduce the emission of nitrogen oxide obviously.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a partial enlarged view of a cross-sectional view of the present invention.
FIG. 4 is a schematic view of a combustor configuration without an outer combustion can.
FIG. 5 is a schematic view of a cyclone disk configuration.
Fig. 6 is a schematic structural view of the gas distribution cap.
The labels in the figure are: 1. a gas inlet pipe; 11. a first gas distribution pipe; 111. a straight air outlet; 12. a second gas distribution pipe; 121. a side gas outlet; 2. an ignition rod; 3. a flame detector; 4. an outer combustion can; 5. a central air tube; 6. An air distribution cap; 61. a spiral air outlet; 62. a hollow cylinder; 63. a truncated hollow cone; 7. a cyclone disk; 71. a cyclone opening; 72. perforating a first gas distribution pipe; 73. a fixing hole; 74. perforating an ignition rod; 75. a flame detector perforation; 76. perforating the air distribution cap; 8. an inner combustion can.
Detailed Description
In order to more fully explain the practice of the invention, the examples of the invention are provided for illustration only and do not limit the scope of the invention.
As shown in fig. 1, the low-nitrogen emission gas burner comprises a gas inlet pipe 1, an ignition rod 2, a flame detector 3, an outer combustion cylinder 4 and a central air pipe 5. The outer combustion cylinder 4 and the gas inlet pipe 1 are coaxially arranged. The sectional view of the burner is shown in fig. 2-3, a central air pipe 5 is further arranged inside the gas inlet pipe 1, and the central air pipe 5 and the gas inlet pipe 1 are also coaxially arranged.
The tail part of the gas inlet pipe 1 is provided with a gas distribution pipe, the gas distribution pipe comprises a first gas distribution pipe 11 and a second gas distribution pipe 12, and the roots of the first gas distribution pipe 11 and the second gas distribution pipe 12 are communicated with the inside of the gas inlet pipe; the first air distribution pipes 11 and the second air distribution pipes 12 are uniformly distributed along the radial direction of the tail part of the gas inlet pipe at intervals, in the embodiment, the number of the first air distribution pipes and the number of the second air distribution pipes are five, an included angle between the axial direction of the first air distribution pipes and/or the axial direction of the second air distribution pipes and the axial direction of the tail part of the gas inlet pipe is an acute angle, so that the gas is sprayed to the front side, and the included angle is set to be 30 degrees in the embodiment.
As shown in fig. 3-6, a cyclone disk 7 is fixedly connected and sleeved outside the tail end pipe of the gas inlet pipe 1, an inner combustion cylinder 8 is sleeved on the periphery of the cyclone disk 7, an outer combustion cylinder 4 is sleeved outside the inner combustion cylinder 8, and a gap is formed between the inner combustion cylinder and the outer combustion cylinder; an air distribution cap 6 is fixedly connected and sleeved in the tail end pipe of the gas inlet pipe 1, the air distribution cap 6 penetrates through the cyclone disc 7 through an air distribution cap perforation 76, and the head of the central air pipe 5 penetrates through the top of the air distribution cap 6; the outer combustion cylinder, the inner combustion cylinder, the cyclone disc, the gas distribution cap and the gas inlet pipe are all coaxially arranged.
The head of the first air distribution pipe 11 passes through the cyclone disk 7 through the first air distribution pipe perforation 72, and the head of the second air distribution pipe 12 is arranged not to pass through the cyclone disk 7, so that the head of the first air distribution pipe and the head of the second air distribution pipe are respectively arranged at two sides of the cyclone disk; a straight air outlet hole 111 is formed in the opening of the head of the first air distribution pipe 11, and fuel gas is sprayed out from the first air distribution pipe to the front side and is restrained by the inner combustion cylinder; the head of the second gas distribution pipe 12 is closed, a side gas outlet 121 is formed in the side surface of the second gas distribution pipe 12, a perpendicular line from the center of the side gas outlet 121 to the axial direction of the second gas distribution pipe is perpendicular to the tail axis of the gas inlet pipe, so that the spraying direction of the gas from the second gas distribution pipe is perpendicular to a plane formed by the axial line of the gas inlet pipe and the axial direction of the second gas distribution pipe, and in the embodiment, the side gas outlets of the five second gas distribution pipes rotate clockwise when viewed from the head direction of the combustion cylinder.
The cyclone disk 7 is provided with a plurality of inclined cyclone openings 71, and the included angle between the air outlet direction of the cyclone openings 71 and the plane of the cyclone disk is an acute angle, in this example, is set to be 45 degrees. Thus, when viewed from the head direction of the outer combustion cylinder, combustion-supporting air blown from the back of the outer combustion cylinder 4 is spirally sprayed clockwise after passing through the cyclone disc; the cyclone disk 7 is further provided with a plurality of first air distribution pipe perforations 72 and cyclone disk fixing holes 73, and is further provided with an ignition rod perforation 74, a flame detector perforation 75 and an air distribution cap perforation 76.
The gas distribution cap 6 is designed into a hollow truncated cone shape and comprises a truncated hollow cone 63 and a hollow cylinder 62, the hollow cylinder 62 is sleeved at the inner end of the gas inlet pipe 1, a spiral gas outlet 61 is arranged on the truncated hollow cone 63 and used for spraying out gas when the burner starts to work, and the gas is ignited by striking sparks of the ignition rod 2 to start burning.
After ignition, the gas inlet amount and the air inlet amount are gradually adjusted through the electronic adjusting valve, along with the increase of the gas flow and the air flow, the gas passing through the gas outlet at the side of the second gas distribution pipe starts to be spirally mixed and combusted under the cyclone disc under the pushing of the air, and the generated flame is ejected forwards through a gap between the inner combustion cylinder and the outer combustion cylinder; meanwhile, a cyclone flow is formed by air of the cyclone disc, so that the fuel gas passing through the first gas distribution pipe is driven to be spirally mixed on the cyclone disc, is combusted in the inner combustion cylinder and is ejected forwards, and layered and partitioned combustion is realized; the gas combustion through the spiral venthole of conical gas distribution cap forms the spiral flame of central axial space layering, and further, the cold air through central air pipe lets in the flame center, can play combustion-supporting and cooling's effect. The burner is integrated, and through various interactions such as spiral mixing, layered combustion and the like, the burner can burn more fully, simultaneously reduce the temperature of central flame and effectively reduce the generation and emission of nitrogen oxides.
Claims (5)
1. The utility model provides a low nitrogen discharges gas combustion ware, includes gas intake pipe, gas distribution pipe, ignition bar, a burning section of thick bamboo, its characterized in that: a central air pipe is also arranged in the center of the gas inlet pipe; the combustion cylinder comprises an outer combustion cylinder and an inner combustion cylinder; the gas distribution pipe is arranged at the tail part of the gas inlet pipe and comprises a first gas distribution pipe and a second gas distribution pipe, the roots of the first gas distribution pipe and the second gas distribution pipe are communicated with the inside of the gas inlet pipe, the first gas distribution pipe and the second gas distribution pipe are uniformly distributed at intervals along the radial direction of the tail part of the gas inlet pipe, and an included angle between the axis of the first gas distribution pipe and/or the second gas distribution pipe and the axis of the tail part of the gas inlet pipe is an acute angle; the head of the first air distribution pipe is opened, the head of the second air distribution pipe is closed, and a side air outlet is formed in the side surface of the second air distribution pipe; a cyclone disc is fixedly connected and sleeved outside the tail end pipe of the gas inlet pipe, the head of the first gas distribution pipe penetrates out of the cyclone disc, the head of the second gas distribution pipe does not penetrate through the cyclone disc, and the head of the first gas distribution pipe and the head of the second gas distribution pipe are respectively arranged on two sides of the cyclone disc; the inner combustion cylinder is sleeved on the periphery of the cyclone disc, the outer combustion cylinder is sleeved on the outer portion of the inner combustion cylinder, and a gap is reserved between the inner combustion cylinder and the outer combustion cylinder; the tail end of the gas inlet pipe is fixedly connected and sleeved with a gas distribution cap in a pipe, the gas distribution cap is in a hollow truncated cone shape, the hollow truncated cone-shaped gas distribution cap comprises a truncated hollow cone and a hollow cylinder, the hollow cylinder is sleeved at the tail end of the gas inlet pipe, and a spiral gas outlet is formed in the truncated hollow cone; the air distribution cap penetrates through the cyclone disc, and the central air pipe penetrates through the air distribution cap; the outer combustion cylinder, the inner combustion cylinder, the cyclone disc, the gas distribution cap, the gas inlet pipe and the central air pipe are coaxially arranged.
2. A low nitrogen emissions gas burner as claimed in claim 1, wherein: and the perpendicular line from the center of the side air outlet of the second air distribution pipe to the axis of the second air distribution pipe is perpendicular to the axis of the gas inlet pipe.
3. A low nitrogen emissions gas burner as claimed in claim 1, wherein: the cyclone disc is provided with a beveled cyclone opening, and the air outlet direction of the cyclone opening forms an acute angle with the plane of the cyclone disc.
4. A low nitrogen emissions gas burner as claimed in claim 1, wherein: and an included angle between the axial direction of the first air distribution pipe and/or the second air distribution pipe and the axial direction of the tail part of the fuel gas inlet pipe is 30 degrees.
5. A low nitrogen emissions gas burner as claimed in claim 3, wherein: the air outlet direction of the cyclone air opening and the plane of the cyclone disc form an included angle of 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340826.5A CN110056875B (en) | 2019-04-25 | 2019-04-25 | Low-nitrogen-emission gas burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340826.5A CN110056875B (en) | 2019-04-25 | 2019-04-25 | Low-nitrogen-emission gas burner |
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| Publication Number | Publication Date |
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| CN110056875A CN110056875A (en) | 2019-07-26 |
| CN110056875B true CN110056875B (en) | 2021-07-23 |
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Effective date of registration: 20240401 Address after: 061000 Cangxian Zhifang tou Industrial Park, Cangzhou, Hebei Patentee after: CANGZHOU TIANLONG BURNING EQUIPMENT CO.,LTD. Country or region after: China Address before: 458000 No.1 bailingqiao, Heshan District, Hebi City, Henan Province Patentee before: Yuan Xiuling Country or region before: China |