CN211694879U - Low-nitrogen gas burner suitable for medium-low heat value fuel - Google Patents
Low-nitrogen gas burner suitable for medium-low heat value fuel Download PDFInfo
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- CN211694879U CN211694879U CN202020222071.7U CN202020222071U CN211694879U CN 211694879 U CN211694879 U CN 211694879U CN 202020222071 U CN202020222071 U CN 202020222071U CN 211694879 U CN211694879 U CN 211694879U
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Abstract
The utility model discloses a low-nitrogen gas burner suitable for middle-low calorific value fuel, which comprises a central fuel cylinder, a cyclone air cylinder, a main fuel outer cylinder and a burner box shell which are distributed from inside to outside in sequence; a swirl disc is arranged at an outlet of the inner swirl air area, a main fuel inlet is arranged at one end of the main fuel gas-collecting ring, and a plurality of main fuel nozzles are arranged at the other end of the main fuel gas-collecting ring; the side of the burner box shell is provided with a combustion-supporting air inlet, wherein, the outlet of the gas fuel pipeline with the medium and low calorific value is communicated with the central fuel inlet and the main fuel inlet, and the combustion-supporting air channel is communicated with the cyclone disk and the outer direct current air area.
Description
Technical Field
The utility model belongs to the technical field of the clean burning of ultra-low nitrogen, a low nitrogen gas burner suitable for middle low calorific value fuel is related to.
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.
Since the standard of 1/4/2015, the standard of controlling the NOx emission mass concentration of all gas boilers (including gas boilers with medium and low calorific values) is reduced to 30mg/m3(Standard, 3.5% O)2). The traditional gas burner with medium and low heat value can not meet the emission requirement. Therefore, it is urgently needed to develop a low NOx gas burner with low heat value to meet the latest environmental protection standardThe method is accurate.
At present, the research on low-nitrogen gas burners with medium and low calorific values is very little, and with the increasing strictness of environmental protection standards, the energy-saving and environment-friendly improvement of gas boilers is urgent, so that the medium and low calorific value gas burner with high combustion efficiency and low nitrogen oxide emission is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a low nitrogen gas burner suitable for well low calorific value fuel, this burner has the characteristics of high combustion efficiency and low nitrogen oxide emission.
In order to achieve the above object, the low nitrogen gas burner suitable for middle and low calorific value fuel of the present invention comprises a central fuel cylinder, a cyclone air cylinder, a main fuel outer cylinder and a burner box shell which are sequentially distributed from inside to outside, wherein a central fuel channel is formed in the central fuel cylinder, an annular inner cyclone air region is formed between the central fuel cylinder and the cyclone air cylinder, an annular main fuel air collecting ring is formed between the cyclone air cylinder and the main fuel outer cylinder, an annular outer direct air region is formed between the main fuel outer cylinder and the burner box shell, one end of the central fuel cylinder is provided with a central fuel inlet, and the other end of the central fuel cylinder is provided with a plurality of central fuel gun nozzles;
a swirl disc is arranged at an outlet of the inner swirl air area, a main fuel inlet is arranged at one end of the main fuel gas-collecting ring, and a plurality of main fuel nozzles are arranged at the other end of the main fuel gas-collecting ring;
and a combustion-supporting air inlet is arranged on the side surface of the combustor box shell, wherein the outlet of the medium-low calorific value gas fuel pipeline is communicated with the central fuel inlet and the main fuel inlet, and the combustion-supporting air channel is communicated with the cyclone disk and the outer direct-current air area.
A first adjusting device is arranged between the combustion-supporting air duct and the cyclone disk.
And a second adjusting device is arranged between the combustion-supporting air duct and the outer direct-current air area.
The central fuel gun nozzles are respectively arranged on the end surface and the side surface of the central fuel cylinder, wherein each central fuel gun nozzle arranged on the end surface of the central fuel cylinder is of an elliptical structure, and each central fuel gun nozzle arranged on the side surface of the central fuel cylinder is a rectangular nozzle.
The number of the main fuel nozzles is two, wherein the size of the first main fuel nozzle is smaller than that of the second main fuel nozzle, the two main fuel nozzles are of rectangular structures, and the distance between the second main fuel nozzle and the axis of the main fuel gas collecting ring is smaller than that between the first main fuel nozzle and the axis of the main fuel gas collecting ring.
The size of the first main fuel nozzle is 1/2 the size of the second main fuel nozzle.
The utility model discloses following beneficial effect has:
low nitrogen gas burner suitable for well low calorific value fuel when concrete operation, combustion air divides the second grade blowout through whirl dryer and burner box shell, well low calorific value gas fuel divides the second grade through central fuel section of thick bamboo and main fuel urceolus and mixes with combustion-supporting gas, thereby make well low calorific value gas fuel and combustion-supporting air realize the homogeneous mixing, with the formation of control NOx, well low calorific value gas fuel arranges simultaneously between central fuel passageway and whirl wind and direct current wind, each central fuel rifle spout is along radial and axial setting, realize central fuel diffusion hybrid combustion, with the reinforcing ability of surely firing, make this combustor have the characteristics of high combustion efficiency and low nitrogen oxide emission, moreover, the steam generator is simple in structure, and is low in cost.
Furthermore, the number of the main fuel nozzles is two, wherein fuel sprayed by one main fuel nozzle is mixed with swirling air for combustion, and fuel sprayed by the other main fuel nozzle is mixed with outer ring direct-current air for combustion, so that fuel classification is realized, the combustion efficiency is improved, and the emission of nitrogen oxides is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a side view of the present invention;
fig. 3 is a schematic structural diagram of the nozzle 1 of the center fuel gun of the present invention;
fig. 4 is a schematic structural diagram of the main fuel nozzle 3 of the present invention.
Wherein, 1 is central fuel gun nozzle, 2 is the spinning disk, 3 is main fuel nozzle, 4 is outer direct current wind region, 5 is main fuel inlet, 6 is central fuel inlet, 7 is the second adjusting device, 8 is the first adjusting device, 9 is central fuel section of thick bamboo, 10 is main fuel urceolus, 11 is the whirl dryer, 12 is combustor case shell, 13 is combustion-supporting wind channel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, fig. 2, fig. 3 and fig. 4, the low nitrogen gas burner suitable for middle and low calorific value fuel of the present invention includes a central fuel cylinder 9, a cyclone air cylinder 11, a main fuel outer cylinder 10 and a burner box shell 12 which are sequentially distributed from inside to outside, wherein a central fuel channel is formed in the central fuel cylinder 9, an annular inner cyclone air region is formed between the central fuel cylinder 9 and the cyclone air cylinder 11, an annular main fuel gas collecting ring is formed between the cyclone air cylinder 11 and the main fuel outer cylinder 10, an annular outer direct air region 4 is formed between the main fuel outer cylinder 10 and the burner box shell 12, a central fuel inlet 6 is arranged at one end of the central fuel cylinder 9, and a plurality of central fuel gun nozzles 1 are arranged at the other end of the central fuel cylinder 9; a swirling disc 2 is arranged at an outlet of the inner swirling air area, a main fuel inlet 5 is arranged at one end of a main fuel gas collecting ring, and a plurality of main fuel nozzles 3 are arranged at the other end of the main fuel gas collecting ring; and a combustion-supporting air inlet is formed in the side surface of the combustor box shell 12, wherein the outlet of a gas fuel pipeline with a medium-low calorific value is communicated with the central fuel inlet 6 and the main fuel inlet 5, and the combustion-supporting air duct 13 is communicated with the cyclone disk 2 and the outer direct-current air area 4.
A first adjusting device 8 is arranged between the combustion-supporting air duct 13 and the cyclone disk 2, and a second adjusting device 7 is arranged between the combustion-supporting air duct 13 and the outer direct-current air area 4.
The central fuel gun nozzles 1 are respectively arranged on the end surface and the side surface of the central fuel cylinder 9, wherein each central fuel gun nozzle 1 arranged on the end surface of the central fuel cylinder 9 is of an elliptical structure, and each central fuel gun nozzle 1 arranged on the side surface of the central fuel cylinder 9 is a rectangular nozzle.
The number of the main fuel nozzles 3 is two, wherein the size of the first main fuel nozzle 3 is smaller than that of the second main fuel nozzle 3, and the two main fuel nozzles 3 are both rectangular structures, wherein the distance between the second main fuel nozzle 3 and the axis of the main fuel gas gathering ring is smaller than that between the first main fuel nozzle 3 and the axis of the main fuel gas gathering ring, and the size of the first main fuel nozzle 3 is 1/2 of the size of the second main fuel nozzle 3.
The axial position of the cyclone disk 2 and the angle of the cyclone blade are both adjustable, the axial position is 50-200mm away from the outer edge of the throat opening of the burner, the angle adjustment range of the cyclone blade is 15-90 degrees, the fuel is divided into two stages, and the combustion air is divided into two stages and can be quantitatively adjusted.
Reach super mixed state through well low heat value gas fuel and combustion air in grades to reach the purpose that maximum degree reduces nitrogen oxide, reach high load regulation nature, furnace and fuel adaptability through adjusting gas fuel at different levels, amount of wind simultaneously, when concrete implementation, the utility model discloses a well low heat value gas boiler denitration provides an economic transformation technical route, relies on the combustor just can reduce low heat value gas boiler nitrogen oxide to 30mg/m emission3(Standard, 3.5% O)2) The nitrogen oxide is controlled to be 30mg/m by matching the medium heat value gas fuel gas boiler with a flue gas recirculation technology3The latest environmental standard requirements are satisfied below.
Claims (6)
1. A low-nitrogen gas burner suitable for middle-low calorific value fuel is characterized by comprising a central fuel cylinder (9), a cyclone air cylinder (11), a main fuel outer cylinder (10) and a burner box shell (12) which are sequentially distributed from inside to outside, wherein a central fuel channel is formed in the central fuel cylinder (9), an annular inner cyclone air region is formed between the central fuel cylinder (9) and the cyclone air cylinder (11), an annular main fuel gas collecting ring is formed between the cyclone air cylinder (11) and the main fuel outer cylinder (10), an annular outer direct-current air region (4) is formed between the main fuel outer cylinder (10) and the burner box shell (12), a central fuel inlet (6) is arranged at one end of the central fuel cylinder (9), and a plurality of central fuel nozzles (1) are arranged at the other end of the central fuel cylinder (9);
a cyclone disc (2) is arranged at an outlet of the inner cyclone wind area, a main fuel inlet (5) is arranged at one end of the main fuel gas-collecting ring, and a plurality of main fuel nozzles (3) are arranged at the other end of the main fuel gas-collecting ring;
and a combustion-supporting air inlet is arranged on the side surface of the combustor box shell (12), wherein the outlet of the medium-low calorific value gas fuel pipeline is communicated with the central fuel inlet (6) and the main fuel inlet (5), and a combustion-supporting air duct (13) is communicated with the cyclone disc (2) and the outer direct-current air area (4).
2. A low nitrogen gas burner for low and medium calorific value fuels according to claim 1, characterized in that a first regulating device (8) is arranged between the combustion air duct (13) and the swirl disc (2).
3. The low nitrogen gas burner for fuels with medium and low calorific value according to claim 2, characterized in that a second regulating device (7) is arranged between the combustion air duct (13) and the outer direct air zone (4).
4. The low nitrogen gas burner for middle and low calorific value fuel according to claim 1, wherein each central fuel gun nozzle (1) is provided on the end surface and the side surface of the central fuel cylinder (9), respectively, wherein each central fuel gun nozzle (1) provided on the end surface of the central fuel cylinder (9) has an elliptical shape, and each central fuel gun nozzle (1) provided on the side surface of the central fuel cylinder (9) has a rectangular shape.
5. The low nitrogen gas burner for low calorific value fuels according to claim 1, wherein the number of the main fuel nozzles (3) is two, wherein the size of the first main fuel nozzle (3) is smaller than that of the second main fuel nozzle (3), and both the two main fuel nozzles (3) are of a rectangular structure, wherein the distance between the second main fuel nozzle (3) and the axis of the main fuel gas collecting ring is smaller than the distance between the first main fuel nozzle (3) and the axis of the main fuel gas collecting ring.
6. A low nitrogen gas burner for low and medium calorific value fuels according to claim 5, wherein the size of the first main fuel nozzle (3) is 1/2 of the size of the second main fuel nozzle (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020222071.7U CN211694879U (en) | 2020-02-27 | 2020-02-27 | Low-nitrogen gas burner suitable for medium-low heat value fuel |
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| CN202020222071.7U CN211694879U (en) | 2020-02-27 | 2020-02-27 | Low-nitrogen gas burner suitable for medium-low heat value fuel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229477A (en) * | 2021-12-24 | 2022-03-25 | 北京理工大学 | Stable powder supply method and device based on internal and external cyclone fluidized powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229477A (en) * | 2021-12-24 | 2022-03-25 | 北京理工大学 | Stable powder supply method and device based on internal and external cyclone fluidized powder |
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