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Secondary air gas-fired boiler combustor and configuration method of secondary air

A technology of gas burners and gas boilers, applied in the direction of combustion methods, gas fuel burners, burners, etc., can solve the problems of reducing NOx emissions and limited effects, and achieve the effects of increasing conversion rate, reducing production amount, and inhibiting production

Pending Publication Date: 2017-02-22
SHANGHAI WISEBOND TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, since boilers and burners in the market belong to different units, the two (boilers and burners) are hardly considered as a whole to reduce NOx emissions, so the effect is limited

Method used

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  • Secondary air gas-fired boiler combustor and configuration method of secondary air
  • Secondary air gas-fired boiler combustor and configuration method of secondary air
  • Secondary air gas-fired boiler combustor and configuration method of secondary air

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Embodiment Construction

[0016] The following are three different furnace types that are common in the market: Π-type boiler ( figure 1 ), D-type boiler ( figure 2 ) and U-shaped boiler ( image 3 ) is an embodiment, and the present invention will be further described in detail in conjunction with the accompanying drawings, the purpose is to enable those of ordinary skill in the art to understand and implement the present invention, and it is not intended to limit the protection scope of the present invention. It should be understood that the types of boilers on the market are not limited to these three. All structures similar to those of the present invention and their similar changes should be included in the protection scope of the present invention. The direction of the arrow in the figure is the direction of flue gas flow.

[0017] There can be multiple gas burners, which can be set as required according to different furnace types.

[0018] It can be seen from the diagram that a secondary ai...

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Abstract

The invention relates to a secondary air gas-fired boiler combustor and a configuration method of secondary air, and belongs to the technical field of gas-fired boiler emission reduction. The technical aims that NOx emissions are reduced through a gas-fired boiler, and meanwhile the heat efficiency of the boiler is not reduced are achieved. The secondary air gas-fired boiler combustor is characterized in that an inner cavity of a hearth is sequentially divided into a main combustion area, a secondary air injection area and an after-combustion area in the flue gas flowing direction starting from a gas combustor; the distance between the main combustion area and the gas combustor ranges from 0 m to 1 m, and 70%-95% of the air volume is supplied by the gas combustor; and the distance between the secondary air injection area and the gas combustor ranges from 1 m to 9 m, the furnace wall of the hearth is provided with a plurality of secondary air nozzles connected with a secondary air conveying pipeline, and 5%-30% of the air volume is supplied by the secondary air nozzles. The secondary air gas-fired boiler combustor has the beneficial effects that the secondary air nozzles are formed in the downstream portion of the gas combustor, the combustion temperature of the main combustion area is reduced, the reducibility atmosphere of the main combustion area is made, and generated thermal NOx and generated fuel NOx are restrained; and the secondary air guarantees that gas fuel is completely combusted, and the heat efficiency of the boiler is not reduced.

Description

technical field [0001] The invention relates to a boiler and a burner that adopts a secondary air thick-lean combustion method, in particular to a secondary air gas boiler burner and a secondary air configuration method to reduce NOx emissions from gas boilers, and belongs to the technical field of low nitrogen emissions from gas boilers. Background technique [0002] With the increasingly prominent environmental problems, the country's requirements for energy conservation and emission reduction are becoming more and more stringent, and the requirements for the emission limit of air pollutants from boilers are getting higher and higher. Boiler factories have adopted low-nitrogen combustion transformation methods to reduce the initial concentration of NOx emissions. Retrofit the boiler with low-nitrogen combustion technology as much as possible to meet the requirements of national standards. If the required emission limit value is not reached, it is necessary to achieve stand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/20F23D14/46F23L9/00F23J15/02
CPCF23D14/20F23D14/46F23J15/02F23L9/00
Inventor 陈宝明田莉勤徐志斌徐正
Owner SHANGHAI WISEBOND TECH
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