Coal-fired boiler with reduced nitric oxide spraying device

A technology of nitrogen oxides and injection devices, which is applied in the field of coal-fired boilers and coal-fired boilers with reduction nitrogen oxides injection devices. To achieve the effect of rapid and stable enhanced ignition, increased oxygen content, and stable operation

Pending Publication Date: 2021-06-29
HARBIN BOSHEN TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor operating economy of existing boilers, slagging, high-temperature corrosion, and large-area tube explosions in the water wall, which seriously affect the normal operation of the boiler, the invention further proposes a coal-fired boiler with a reducing nitrogen oxide injection device

Method used

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  • Coal-fired boiler with reduced nitric oxide spraying device
  • Coal-fired boiler with reduced nitric oxide spraying device
  • Coal-fired boiler with reduced nitric oxide spraying device

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this embodiment, a kind of coal-fired boiler with reduction nitrogen oxide injection device described in this embodiment, it includes furnace body 1; This embodiment also includes a plurality of first forced reduction nitrogen oxide spray guns 2, a plurality of The first forced reduction nitrogen oxide spray gun 2 is installed between the burner of the exhaust air in the furnace body 1 and the refraction angle of the furnace.

specific Embodiment approach 2

[0022] Specific implementation mode two: combination Figure 1 to Figure 5 To illustrate this embodiment, a plurality of first forced reduction nitrogen oxide spray guns 2 of a coal-fired boiler with an injection device for reducing nitrogen oxides in this embodiment refers to at least two first forced reduction nitrogen oxide spray guns 2 . Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 to Figure 5 Describe this embodiment, a coal-fired boiler with a reduced nitrogen oxide injection device described in this embodiment also includes a plurality of second forced reduction nitrogen oxide spray guns 3, and a plurality of second forced nitrogen oxide spray guns 3 are installed on The furnace outlet of the furnace body 1 is in the horizontal flue. Other components and connections are the same as those in the first embodiment.

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Abstract

The utility model relates to a coal-fired boiler, in particular to a coal-fired boiler with a reduced nitrogen oxide injection device. The problems that an existing boiler is poor in operation economical efficiency, and normal operation of the boiler is seriously affected due to slag bonding, high-temperature corrosion and large-area pipe explosion of a water cooling wall are solved. The coal-fired boiler comprises a plurality of first forcibly-reduced nitrogen oxide spray guns which are installed between an over-fire air burner in a furnace body and a furnace arch of a hearth. The invention belongs to the field of boiler equipment.

Description

technical field [0001] The invention relates to a coal-fired boiler, in particular to a coal-fired boiler with an injection device for reducing nitrogen oxides, and belongs to the field of boiler equipment. Background technique [0002] The most widely adopted and most mature mainstream low NOx combustion technology in domestic pulverized coal boilers is the low nitrogen burner + air staged reduction technology to reduce nitrogen oxides. By increasing the exhaust air, the longitudinal air staged combustion in the furnace is realized, and the main combustion area is reduced. The excess air ratio enhances the reducing atmosphere in the main combustion zone and reduces NOx in the flue gas. [0003] At present, the quality of coal used by domestic boilers varies greatly. With the increasingly stringent national environmental protection indicators, most power plants have adopted the air deep-stage low-nitrogen combustion technology alone. In order to ensure the reduction of boile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23C7/00F23J7/00F23D1/00
CPCF23C5/08F23C7/00F23J7/00F23D1/00
Inventor 牛海峰于淼杨振国郭建军张慧琦吴东海
Owner HARBIN BOSHEN TECH DEV CO LTD
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