Nozzle structure for overfired air of boiler combustor

A technology of boiler combustion and burn-out air, which is applied in the direction of combustion equipment, lighting and heating equipment, etc. It can solve the problems of inability to swing up and down at the same time, large deviation of flue gas temperature at the furnace outlet, and large NOx emissions.

Inactive Publication Date: 2012-08-01
WUXI HUAGUANG BOILER
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the change of boiler load and coal type, the overburning air nozzle adopts a swing structure to adjust the mixing timing and mixing degree of the overburning air. At present, the general technology can only swing up and down, left and right, but it cannot be left and right at the same time when swinging up and down. Swing, swing up and down at the same time when swinging left and right, it can not finely adjust the boiler combustion, so that when the boiler pulverized coal is fully burned, the NOx emission is large, and the flue gas temperature deviation at the furnace outlet is large

Method used

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  • Nozzle structure for overfired air of boiler combustor
  • Nozzle structure for overfired air of boiler combustor
  • Nozzle structure for overfired air of boiler combustor

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Embodiment Construction

[0013] See figure 1 , figure 2 , image 3 , Figure 4 , which includes a pipeline 1, the outlet area of ​​the pipeline 1 is provided with a swing blade, the swing blade is divided into an up and down swing blade assembly 2, a left and right swing blade assembly 3, the up and down swing blade assembly 2, and the left and right swing blade assembly 3 are not in the same plane area, up and down The swing blade assembly 2 is connected with a vertical swing pull rod 4 , and the left and right swing blade assembly 3 is connected with a left and right swing pull rod 5 .

[0014] The structure of the up and down swinging blade assembly 2 and the left and right swinging blade assembly 3 specifically includes a blade 6, a blade rotating shaft 7, and a fastening assembly 8 at the front end of the blade. The inner wall of the inner wall, the front end of the blade 6 is respectively supported on the blade front end fastening assembly 8, the blades 6 are all arranged in parallel, the up...

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Abstract

The invention provides a nozzle structure for overfired air of a boiler combustor. Combustion of a boiler can be subjected to fine adjustment, so that coal powder in the boiler can be combusted fully, and simultaneously low NOx emission can be realized, so that smoke temperature deviation at the outlet of a hearth is reduced. The nozzle structure comprises a pipeline, wherein swing blades are arranged in the outlet region of the pipeline. The nozzle structure is characterized in that the swing blades are classified into a longitudinal swing blade component and a transverse swing blade component which are positioned in different planar regions; and the longitudinal swing blade component is connected with a longitudinal swing pull rod; and the transverse swing blade component is connected with a transverse swing pull rod.

Description

technical field [0001] The invention relates to the technical field of boiler burner structure, in particular to the nozzle structure of the burner air of the boiler burner. Background technique [0002] NO emissions from coal combustion X The gas is not only harmful, but also a difficult air pollutant to deal with. It not only stimulates the human respiratory system, damages animals and plants, and destroys the ozone layer, but also is one of the main substances that cause the greenhouse effect, acid rain, and photochemical reactions. my country is a big coal-burning country, and the development of reducing NO X Emission control is of great significance. Methods of changing combustion conditions to reduce NOx emissions are collectively referred to as low NOx combustion technologies. Among various technologies for reducing NOx emissions, low NOx combustion technology is relatively simple, economical, and the most widely used and effective method. At present, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C7/00
Inventor 薛金彪陈益增韦志平杨浩耿长萍
Owner WUXI HUAGUANG BOILER
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