CN209840076U - Flue gas extrinsic cycle formula NOX reduces discharging structure - Google Patents
Flue gas extrinsic cycle formula NOX reduces discharging structure Download PDFInfo
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- CN209840076U CN209840076U CN201920402573.5U CN201920402573U CN209840076U CN 209840076 U CN209840076 U CN 209840076U CN 201920402573 U CN201920402573 U CN 201920402573U CN 209840076 U CN209840076 U CN 209840076U
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Abstract
The utility model discloses a smoke external circulation type NOX emission reduction structure, which comprises a boiler and a chimney communicated with the boiler through a discharge pipe; the boiler is provided with a burner consisting of an Ou Bao burner, and the burner is communicated with a combustion-supporting air inlet pipe; the discharge pipe is provided with an energy saver and is communicated with the combustion air inlet pipe through a circulating flue gas recovery pipe; the boiler exhaust smoke is cooled by the economizer and then enters the combustion air inlet pipe through the circulating smoke recycling pipe to be mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and a low-temperature combustion-supporting gas supply structure for the combustor is formed.
Description
Technical Field
The utility model relates to a heat energy supply system, it is specific, its show a flue gas extrinsic cycle formula NOX emission reduction structure.
Background
In the field of modern production technology, the utilization of heat energy is distributed in various links of social production, and a heating medium boiler is a common heat energy supply device which supplies heat energy at different temperatures in the production process.
After the fuel and air mixture enters the hearth, the temperature of the mixture airflow rises quickly due to convection and radiation heating of surrounding high-temperature flue gas. When the ignition temperature is reached, the fuel begins to burn, at which point the temperature rises sharply to a level close to the adiabatic temperature. Meanwhile, due to convection and radiation heat exchange between the flue gas and the surrounding medium, the temperature is gradually reduced until the temperature of the flue gas is the same as that of the surrounding medium, namely the flue gas flows through the whole hearth while being cooled. It follows that the flame temperature distribution within the furnace is in fact not uniform. Usually, the temperature is highest at a distance from the burner outlet, and is lower both before and after it, i.e. there is a local high temperature zone. Since the temperature in this zone is much higher than the average temperature level in the furnace, it has a large effect on the amount of NOx produced: the higher the temperature, the more NOx is produced.
NOx (nitrogen oxides) are primarily Nitric Oxide (NO) and nitrogen dioxide (NO2), which are present in the atmosphere and for a period of time to the extent that they have a deleterious effect on humans, animals, plants and other substances, and form pollutants.
Therefore, it is necessary to provide a flue gas external circulation type NOX reduction structure to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a flue gas extrinsic cycle formula NOX reduces discharging structure, it forms multistage air feed formula dispersed combustion through the Europe guarantor combustor, has effectively inhibited NOx and has generated the reaction, has improved boiler thermal efficiency again, retrieves the recovery after discharging the flue gas cooling through the energy-saving appliance simultaneously, guarantees that the air that gets into the combustor is less than 150 ℃, forms the effective suppression to the formation of NOx and emission.
The technical scheme is as follows:
a flue gas external circulation type NOX emission reduction structure comprises a boiler and a chimney communicated with the boiler through an exhaust pipe; the boiler is provided with a burner consisting of an Ou Bao burner, and the burner is communicated with a combustion-supporting air inlet pipe; the discharge pipe is provided with an energy saver and is communicated with the combustion air inlet pipe through a circulating flue gas recovery pipe; the boiler exhaust smoke is cooled by the economizer and then enters the combustion air inlet pipe through the circulating smoke recycling pipe to be mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and a low-temperature combustion-supporting gas supply structure for the combustor is formed.
Further, a condenser is arranged on the discharge pipe.
Further, the end of the combustion air inlet pipe is provided with an air blower.
Furthermore, a smoke circulating butterfly valve is arranged on the circulating smoke recycling pipe.
Furthermore, a recycling flue gas recycling fan is arranged on the recycling flue gas recycling pipe.
Furthermore, a mixed air bellow is arranged at the joint of the circulating flue gas recovery pipe and the combustion air inlet pipe.
Compared with the prior art, the utility model discloses it forms multistage air feed formula dispersed combustion through the euro guarantor combustor, has effectively inhibited NOx and has generated the reaction, has improved boiler efficiency again, retrieves the recovery after discharging the flue gas cooling through the energy-saving appliance simultaneously, guarantees that the air that gets into the combustor is less than 150 ℃, forms the effective suppression to NOx's formation and emission.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Example (b):
referring to fig. 1, the embodiment shows a flue gas external circulation type NOX emission reduction structure, which includes a boiler 1 and a chimney 3 communicated with the boiler 1 through an exhaust pipe 2; the boiler 1 is provided with a burner 11 consisting of an Ou Bao burner, and the burner 11 is communicated with a combustion-supporting air inlet pipe 4; the discharge pipe 2 is provided with an energy saver 5, and the discharge pipe 4 is communicated with a combustion air inlet pipe 4 through a circulating flue gas recovery pipe 6; the temperature of the flue gas discharged by the boiler 1 is reduced by 5 ℃ through the energy saver, and then the flue gas enters the combustion-supporting air inlet pipe 4 through the circulating flue gas recovery pipe to be mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, so that a low-temperature combustion-supporting gas supply structure for the combustor is formed.
A condenser 7 is also provided on the discharge pipe 2.
The end part of the combustion air inlet pipe 4 is provided with an air blower 8, and the air blower is correspondingly provided with a silencer.
A flue gas circulation butterfly valve 9 is arranged on the circulation flue gas recovery pipe 6.
The recycling flue gas recycling pipe 6 is provided with a recycling flue gas recycling fan 10.
And a wind mixing air box 41 is arranged at the joint of the circulating flue gas recovery pipe 6 and the combustion air inlet pipe 4.
Compared with the prior art, the utility model discloses it forms multistage air feed formula dispersed combustion through the euro guarantor combustor, has effectively inhibited NOx and has generated the reaction, has improved boiler efficiency again, retrieves the recovery after discharging the flue gas cooling through the energy-saving appliance simultaneously, guarantees that the air that gets into the combustor is less than 150 ℃, forms the effective suppression to NOx's formation and emission.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.
Claims (6)
1. The utility model provides a flue gas extrinsic cycle formula NOX reduces discharging structure which characterized in that: comprises a boiler and a chimney communicated with the boiler through a discharge pipe; the boiler is provided with a burner consisting of an Ou Bao burner, and the burner is communicated with a combustion-supporting air inlet pipe; the discharge pipe is provided with an energy saver and is communicated with the combustion air inlet pipe through a circulating flue gas recovery pipe; the boiler exhaust smoke is cooled by the economizer and then enters the combustion air inlet pipe through the circulating smoke recycling pipe to be mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and a low-temperature combustion-supporting gas supply structure for the combustor is formed.
2. The flue gas external circulation type NOX emission reduction structure according to claim 1, characterized in that: the discharge pipe is also provided with a condenser.
3. The flue gas external circulation type NOX emission reduction structure according to claim 2, characterized in that: the end of the combustion air inlet pipe is provided with a blower.
4. The flue gas external circulation type NOX emission reduction structure according to claim 3, characterized in that: a smoke circulating butterfly valve is arranged on the circulating smoke recycling pipe.
5. The flue gas external circulation type NOX emission reduction structure according to claim 4, characterized in that: and a recycling flue gas recycling fan is arranged on the recycling flue gas recycling pipe.
6. The flue gas external circulation type NOX emission reduction structure of claim 5, wherein: and a wind mixing air box is arranged at the joint of the circulating flue gas recovery pipe and the combustion air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402573.5U CN209840076U (en) | 2019-03-27 | 2019-03-27 | Flue gas extrinsic cycle formula NOX reduces discharging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402573.5U CN209840076U (en) | 2019-03-27 | 2019-03-27 | Flue gas extrinsic cycle formula NOX reduces discharging structure |
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| Publication Number | Publication Date |
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| CN209840076U true CN209840076U (en) | 2019-12-24 |
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| CN201920402573.5U Active CN209840076U (en) | 2019-03-27 | 2019-03-27 | Flue gas extrinsic cycle formula NOX reduces discharging structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984486A (en) * | 2021-02-26 | 2021-06-18 | 西安西热锅炉环保工程有限公司 | Energy-saving and emission-reducing system and method for small and medium-sized natural gas boilers |
-
2019
- 2019-03-27 CN CN201920402573.5U patent/CN209840076U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984486A (en) * | 2021-02-26 | 2021-06-18 | 西安西热锅炉环保工程有限公司 | Energy-saving and emission-reducing system and method for small and medium-sized natural gas boilers |
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