CN209977990U - Low-nitrogen full-premixing steam boiler - Google Patents
Low-nitrogen full-premixing steam boiler Download PDFInfo
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- CN209977990U CN209977990U CN201920760791.6U CN201920760791U CN209977990U CN 209977990 U CN209977990 U CN 209977990U CN 201920760791 U CN201920760791 U CN 201920760791U CN 209977990 U CN209977990 U CN 209977990U
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Abstract
The utility model discloses a low-nitrogen full-premix steam boiler, belonging to the field of boilers; the technical problem to be solved is to provide a steam boiler which has simple structure, convenient use, back fire prevention, stable fire, high combustion efficiency, no high temperature point and low nitrogen combustion; the technical scheme for solving the technical problem is as follows: a low-nitrogen fully-premixed steam boiler comprises a vertical boiler, wherein an air outlet pipe is arranged at the top of the vertical boiler, a liquid inlet pipe is arranged at the bottom of the vertical boiler, a combustion device is arranged in the middle of the right side of the vertical boiler, a smoke outlet is arranged at the upper part of the left side of the vertical boiler, a lower steam drum is arranged at the lower side of the interior of the vertical boiler, an upper steam drum is arranged at the upper part of the interior of the vertical boiler, a plurality of vertical communicating pipelines are arranged between the lower steam drum and the upper steam drum, the lower steam drum is connected with the liquid inlet pipe, the upper steam drum is connected; the utility model discloses but wide application in boiler field.
Description
Technical Field
The utility model relates to a low nitrogen full premix steam boiler belongs to boiler technical field.
Background
In recent years, national PM2.5 is over-standard in large area, the haze phenomenon is serious, nitrogen oxide is an important prerequisite formed by PM2.5, the main component of natural gas is methane, when the natural gas is combusted in a boiler hearth, nitrogen in air reacts with oxygen at high temperature to produce nitrogen oxide, when the temperature is lower than 1500 ℃, the generation amount of the nitrogen oxide is small, when the temperature is higher than 1500 ℃, the reaction speed is increased by 6 ~ 7 times, the temperature distribution of the hearth is uneven in the actual combustion process, the local combustion temperature in the hearth is high and basically reaches more than 1500 ℃, the local high temperature points generate a large amount of thermal nitrogen oxide, low nitrogen emission is difficult to realize, the FGR type recirculation low nitrogen combustor and the FPB type full premix combustor are arranged on the market at the current stage, the FGR type low nitrogen combustor has the advantages of safe structure and strong applicability, but has large investment, the mixed flue gas can cause combustor resonance, the combustor can not reach the design output, the FPB full premix combustor adopts a metal mesh combustion surface, in order to prolong the service life of a metal mesh, the FPB combustor is usually adjusted to be large, the air is imported, and the full premix combustor is damaged due to the safe combustion accident of the metal mesh.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the deficiencies in the prior art, a simple structure is provided, convenient to use can the anti-backfire, and steady fire, combustion efficiency is high, high temperature point can not appear, can realize the steam boiler of low nitrogen burning.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a low nitrogen full premix steam boiler, including vertical boiler, vertical boiler top is provided with the outlet duct, the bottom is provided with the feed liquor pipe, the right side middle part is provided with burner, left side upper portion is provided with the exhaust port, the inside downside of vertical boiler is provided with down the steam pocket, upper portion is provided with the steam pocket, be provided with many vertical intercommunication pipelines between lower steam pocket and the steam pocket, the steam pocket links to each other with the feed liquor pipe down, it links to each other with the outlet duct to go up the steam pocket, be provided with even air chamber between burner and the vertical boiler, even air chamber left side links to each other with the vertical boiler inner chamber, the right side links to each other with burner, be provided.
And a pore plate is arranged between the combustion device and the water-cooling pipe.
The vertical communicating pipelines are honeycomb-arranged close-packed pipelines.
And the air outlet pipe is provided with a safety valve.
The inlet of the combustion device is provided with a Venturi device.
Compared with the prior art, the utility model following beneficial effect has: set up even air chamber between burner and boiler, can carry out even mixture with gas and air in even air chamber, be provided with the water-cooling tube between even air chamber and the burner simultaneously, can effectual stable combustion flame, the orifice plate can effectually prevent the tempering, guarantees that the gas burns at low temperature, greatly reduced the nitrogen oxide that the burning produced, accord with the environmental protection requirement.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1 is a vertical boiler, 2 is an air outlet pipe, 3 is a liquid inlet pipe, 4 is a combustion device, 5 is a smoke outlet, 6 is a lower steam drum, 7 is an upper steam drum, 8 is a gas homogenizing chamber, 9 is a water cooling pipe, 10 is a pore plate, 11 is a vertical communicating pipeline, and 12 is a Venturi device.
Detailed Description
As shown in figure 1, the utility model relates to a low-nitrogen full-premix steam boiler, which comprises a vertical boiler 1, wherein the top of the vertical boiler 1 is provided with an air outlet pipe 2, the bottom is provided with a liquid inlet pipe 3, the middle part of the right side is provided with a combustion device 4, the upper part of the left side is provided with an exhaust port 5, the lower side of the interior of the vertical boiler 1 is provided with a lower steam pocket 6, the upper part is provided with an upper steam pocket 7, a plurality of vertical communicating pipelines 11 are arranged between the lower steam pocket 6 and the upper steam pocket 7, the lower steam pocket 6 is connected with the liquid inlet pipe 3, the upper steam pocket 7 is connected with the air outlet pipe 2, an air homogenizing chamber 8 is arranged between the combustion device 4 and the vertical boiler 1, the left side of the air homogenizing chamber 8 is connected with the inner cavity of the vertical boiler 1, the right side is connected with the combustion device 4, a water cooling pipe, the air outlet pipe 2 is provided with a safety valve, and the inlet of the combustion device 4 is provided with a Venturi device 12.
When the utility model is used, the gas and the air are completely premixed through the Venturi device, the complete combustion of the gas can be ensured, the orifice plate can be used for preventing backfire when the gas is combusted, the gas and the air pass through the small holes on the orifice plate at a certain flow velocity, then the flame is stabilized through the water cooling pipe, the combustion temperature is reduced, the combustion of the gas is ensured under the low-temperature state, the nitride generated by the combustion is greatly reduced, the flue gas generated by the combustion enters the inner cavity of the boiler, meanwhile, the heat exchange medium water enters the lower steam pocket through the liquid inlet pipe at the lower part of the boiler, enters the vertical communicating pipeline through the lower steam pocket and then enters the upper steam pocket, the heat exchange medium water and the flue gas exchange heat in the vertical communicating pipeline, the flue gas after the heat exchange is discharged through the smoke outlet, the medium water after the heat exchange enters other places from the top for use, through the structure, the emission concentration, the discharge concentration was 23mg/m3The exhaust gas temperature is 40.2 ℃, and the combustion efficiency is 104.5%.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. A low-nitrogen fully-premixed steam boiler is characterized in that: the vertical boiler comprises a vertical boiler (1), wherein an air outlet pipe (2) is arranged at the top of the vertical boiler (1), a liquid inlet pipe (3) is arranged at the bottom of the vertical boiler, a combustion device (4) is arranged in the middle of the right side of the vertical boiler, an exhaust port (5) is arranged at the upper portion of the left side of the vertical boiler (1), a lower steam drum (6) is arranged at the lower side of the inside of the vertical boiler (1), an upper steam drum (7) is arranged at the upper portion of the vertical boiler, a plurality of vertical communicating pipelines (11) are arranged between the lower steam drum (6) and the upper steam drum (7), the lower steam drum (6) is connected with the liquid inlet pipe (3), the upper steam drum (7) is connected with the air outlet pipe (2), an even air chamber (8) is arranged between the combustion device (4) and the vertical boiler (1), the left side of the even air chamber.
2. A low nitrogen fully premixed steam boiler according to claim 1, characterized in that: and a pore plate (10) is arranged between the combustion device (4) and the water cooling pipe (9).
3. A low nitrogen fully premixed steam boiler according to claim 1, characterized in that: the vertical communicating pipelines (11) are honeycomb-arranged densely-arrayed pipelines.
4. A low nitrogen fully premixed steam boiler according to claim 1, characterized in that: and a safety valve is arranged on the air outlet pipe (2).
5. A low nitrogen fully premixed steam boiler according to claim 1, characterized in that: the inlet of the combustion device (4) is provided with a Venturi device (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920760791.6U CN209977990U (en) | 2019-05-24 | 2019-05-24 | Low-nitrogen full-premixing steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920760791.6U CN209977990U (en) | 2019-05-24 | 2019-05-24 | Low-nitrogen full-premixing steam boiler |
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| Publication Number | Publication Date |
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| CN209977990U true CN209977990U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920760791.6U Active CN209977990U (en) | 2019-05-24 | 2019-05-24 | Low-nitrogen full-premixing steam boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963832A (en) * | 2021-04-02 | 2021-06-15 | 中国科学技术大学 | Full-premix low NOx burner with explosion-proof function |
-
2019
- 2019-05-24 CN CN201920760791.6U patent/CN209977990U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963832A (en) * | 2021-04-02 | 2021-06-15 | 中国科学技术大学 | Full-premix low NOx burner with explosion-proof function |
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