CN212430861U - High-stable-combustion afterburning burner device - Google Patents
High-stable-combustion afterburning burner device Download PDFInfo
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- CN212430861U CN212430861U CN202022071248.0U CN202022071248U CN212430861U CN 212430861 U CN212430861 U CN 212430861U CN 202022071248 U CN202022071248 U CN 202022071248U CN 212430861 U CN212430861 U CN 212430861U
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Abstract
The utility model discloses a high stable combustion afterburning burner device, which comprises a fuel disc, a gas fuel pipe, a combustion-supporting air duct and an annular gradient fan cover; the fuel disc, the gas fuel pipe and the combustion-supporting air duct are sequentially arranged from inside to outside, a gas fuel channel is formed between the fuel disc and the gas fuel pipe, a combustion-supporting air channel is formed between the gas fuel pipe and the combustion-supporting air duct, the annular gradient fan cover is arranged at the outlet of the combustion-supporting air channel, a plurality of air outlet holes are formed in the annular gradient fan cover, and a plurality of fuel nozzles are formed in the fuel disc; from inside to outside, the diameter of each exhaust vent on the annular gradient wind cover increases gradually, and the device can effectual insulation preheat boiler afterburning poor problem of combustion stability.
Description
Technical Field
The utility model belongs to the technical field of exhaust-heat boiler burning, a high steady burning nature afterburning heating burner device is related to.
Background
In recent years, with the higher and higher standards of national environmental protection requirements, the coal-fired unit is almost in a stagnation state, and the waste heat boiler matched with the gas turbine is generally seen at home and abroad due to the characteristics of high power generation efficiency, low pollutant emission and the like. In order to improve the steam temperature or the yield of the system, a complementary combustion system is usually adopted for the waste heat boiler. The afterburning system is divided into internal afterburning and external afterburning. The external afterburning system needs to be provided with a special external combustion chamber at the front part of the boiler, so that the investment is high, the operation and maintenance are inconvenient, and the structure of the boiler is complex, so that the external afterburning scheme can be adopted only when the afterburning quantity is very large or a user has a clear requirement. The internal afterburning system is generally arranged in an inlet flue of the boiler, excess air in smoke discharged by a combustion engine is used as combustion air, the internal space of the inlet flue is used as an afterburning combustion chamber, and a combustion fan is matched. At present, most of internal afterburning devices of waste heat boilers generally selected at home and abroad have the defect of unstable combustion.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a high steady burning nature afterburning heating burner device, the device can effectual absolute preheating boiler afterburning poor problem of combustion stability.
In order to achieve the above purpose, the high stable combustion afterburning burner device of the utility model comprises a fuel disk, a gas fuel pipe, a combustion-supporting air duct and an annular gradient fan cover;
the fuel disc, the gas fuel pipe and the combustion-supporting air duct are sequentially arranged from inside to outside, a gas fuel channel is formed between the fuel disc and the gas fuel pipe, a combustion-supporting air channel is formed between the gas fuel pipe and the combustion-supporting air duct, the annular gradient fan cover is arranged at the outlet of the combustion-supporting air channel, a plurality of air outlet holes are formed in the annular gradient fan cover, and a plurality of fuel nozzles are formed in the fuel disc;
the diameters of the air outlet holes on the annular gradient wind shield are gradually increased from inside to outside.
The fuel disc is located within the top opening of the gas fuel pipe.
The fuel nozzles are arranged in sequence along the circumferential direction.
The included angle between the injection direction of the fuel nozzle and the central line of the fuel disk is alpha, and alpha is more than 0 degree and less than or equal to 70 degrees.
The fuel disc is located at a central region of the annular gradient wind shield.
The inclination angle of the side wall of the annular gradient wind cover is beta, wherein the beta is more than 10 degrees and less than or equal to 50 degrees.
The utility model discloses following beneficial effect has:
high steady burning nature afterburning heating burner device when concrete operation, gaseous fuel sends into fuel tray department through the gaseous fuel pipe, the fuel spout blowout of arranging on the rethread fuel tray, make gaseous fuel present umbelliform structure blowout, the exhaust vent blowout on annular gradient fan housing is passed through behind the combustion-supporting dryer to combustion-supporting wind, wherein wind is crescent along axial wind level, send into the regional amount of wind of fuel tray along the axial increasingly big, on-the-spot air supply layer upon layer, in order to guarantee combustion stability, realize improving burnout nature and low NOx characteristic simultaneously, root burning flame is in the combustor section of thick bamboo all the time, can not receive the influence of exhaust-heat boiler high temperature oxygen deficiency flue gas, the flue gas temperature in the exhaust-heat boiler is improved to the constancy, and then improve the operating efficiency of whole unit.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of a fuel nozzle of the present invention;
fig. 4 is a schematic structural diagram of the annular gradient fan housing 2 of the present invention;
wherein, 1 is a combustion-supporting air duct, 2 is an annular gradient fan cover, 3 is a fuel disc, and 4 is a gas fuel pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 to 4, the high stable combustion afterburning burner device of the present invention comprises a fuel plate 3, a gas fuel pipe 4, a combustion-supporting air duct 1 and an annular gradient fan housing 2; the fuel disc 3, the gas fuel pipe 4 and the combustion-supporting air duct 1 are sequentially arranged from inside to outside, a gas fuel channel is formed between the fuel disc 3 and the gas fuel pipe 4, a combustion-supporting air channel is formed between the gas fuel pipe 4 and the combustion-supporting air duct 1, the annular gradient fan housing 2 is arranged at an outlet of the combustion-supporting air channel, a plurality of air outlet holes are formed in the annular gradient fan housing 2, and a plurality of fuel nozzles are formed in the fuel disc 3; the diameters of the air outlet holes on the annular gradient fan housing 2 are gradually increased from inside to outside.
The fuel disc 3 is located in the top opening of the gas fuel pipe 4; the fuel nozzles are arranged in turn along the circumferential direction, the included angle between the injection direction of the fuel nozzles and the central line of the fuel plate 3 is alpha, and alpha is more than 0 degree and less than or equal to 70 degrees.
The fuel plate 3 is positioned in the central area of the annular gradient fan housing 2, the side wall of the annular gradient fan housing 2 has an inclination angle beta, wherein beta is larger than 10 degrees and is less than or equal to 50 degrees.
The utility model discloses a concrete working process does:
the gas fuel is delivered to the fuel plate 3 through the gas fuel pipe 4 and then is ejected through the fuel nozzle arranged on the fuel plate 3, so that the gas fuel is ejected in an umbrella-shaped structure, combustion-supporting air is ejected through the air outlet holes in the annular gradient fan housing 2 after passing through the combustion-supporting air duct 1, the air level is gradually increased along the axial direction, the air volume delivered to the fuel plate 3 area is gradually increased along the axial direction, and air is delivered layer by layer on site to ensure the combustion stability.
In addition, in practical application, the flow speed of flue gas in the flue directly determines the adjustment of the angles alpha and beta, when the flow speed in the flue is low, the flue gas has little influence on the combustion stability of the afterburning burner device, so that alpha is reduced and beta is increased, most of flame can be sprayed out of the fuel plate 3 and is combusted in the flue; when the flow velocity is higher in the flue, the flue gas has a large influence on the combustion stability of the afterburning heating burner device, alpha is increased, beta is decreased, flame can be concentrated in the combustion cylinder, the high-temperature flue gas and the high-speed incoming flow low-temperature flue gas are mixed, and the flue gas temperature in the whole flue is improved.
Claims (6)
1. A high stable combustion afterburning heating burner device is characterized by comprising a fuel disc (3), a gas fuel pipe (4), a combustion-supporting air duct (1) and an annular gradient air cover (2);
the fuel plate (3), the gas fuel pipe (4) and the combustion-supporting air cylinder (1) are sequentially arranged from inside to outside, a gas fuel channel is formed between the fuel plate (3) and the gas fuel pipe (4), a combustion-supporting air channel is formed between the gas fuel pipe (4) and the combustion-supporting air cylinder (1), the annular gradient fan cover (2) is arranged at the outlet of the combustion-supporting air channel, a plurality of air outlet holes are formed in the annular gradient fan cover (2), and a plurality of fuel nozzles are formed in the fuel plate (3);
the diameters of the air outlet holes on the annular gradient fan cover (2) are gradually increased from inside to outside.
2. The afterburner burner device of claim 1, wherein the fuel disc (3) is located in the top opening of the gas fuel pipe (4).
3. The afterburner burner apparatus of claim 1, wherein each of the fuel nozzles is arranged in a circumferential sequence.
4. The afterburner burner apparatus of claim 1, wherein the angle between the direction of injection of the fuel jets and the centerline of the fuel disc (3) is α, and 0 ° < α ≦ 70 °.
5. The afterburner burner device of claim 1, wherein the fuel disc (3) is located at a central region of the annular gradient hood (2).
6. The afterburner burner device of claim 1, wherein the angle of inclination of the side wall of the annular gradient hood (2) is β, wherein β is < 10 ° and 50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022071248.0U CN212430861U (en) | 2020-09-18 | 2020-09-18 | High-stable-combustion afterburning burner device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022071248.0U CN212430861U (en) | 2020-09-18 | 2020-09-18 | High-stable-combustion afterburning burner device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212430861U true CN212430861U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022071248.0U Active CN212430861U (en) | 2020-09-18 | 2020-09-18 | High-stable-combustion afterburning burner device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964066A (en) * | 2020-09-18 | 2020-11-20 | 西安西热锅炉环保工程有限公司 | High-stable-combustion afterburning burner device |
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2020
- 2020-09-18 CN CN202022071248.0U patent/CN212430861U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964066A (en) * | 2020-09-18 | 2020-11-20 | 西安西热锅炉环保工程有限公司 | High-stable-combustion afterburning burner device |
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