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Smoke backdraft multi-flow low-NOx horizontal circulating fluidized bed boiler

A circulating fluidized bed and multi-process technology, which is applied in flue gas combustion, fluidized bed combustion equipment, fuel burned in a molten state, etc., can solve the bottleneck of NOx emission reduction effect and achieve compact structure and low oxygen content , changing the effect of gas-solid flow field

Active Publication Date: 2017-08-22
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the NOx emission reduction effect of this air staged combustion method has reached the bottleneck

Method used

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  • Smoke backdraft multi-flow low-NOx horizontal circulating fluidized bed boiler
  • Smoke backdraft multi-flow low-NOx horizontal circulating fluidized bed boiler
  • Smoke backdraft multi-flow low-NOx horizontal circulating fluidized bed boiler

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Embodiment Construction

[0025] The specific embodiment of the present invention and working process will be further described below in conjunction with accompanying drawing.

[0026] The orientation terms such as up, down, left, right, front and rear in this application document are established based on the positional relationship shown in the drawings. If the drawings are different, the corresponding positional relationship may also change accordingly, so this should not be understood as limiting the scope of protection.

[0027] Such as figure 1 As shown, a multi-process low NOx horizontal circulating fluidized bed boiler with flue gas back-burning includes a primary air chamber 1, a fuel supply device 3, a main combustion chamber 6, an auxiliary combustion chamber 7, a burnout chamber 10, and a separator 11. Primary feeder 24 , secondary feeder 23 , connecting flue 12 , tail flue and heating surface 13 . The main combustion chamber 6, the secondary combustion chamber 7 and the burnout chamber 10...

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Abstract

A smoke backdraft multi-flow low-NOx horizontal circulating fluidized bed boiler comprises a primary air chamber, a main combustion chamber, an auxiliary combustion chamber and the like. The lower portion of a side wall of the main combustion chamber is provided with lower secondary air nozzles, and the bottoms of the lower secondary air nozzles are provided with a lower secondary air bellow. A ceiling is provided with an overhead central secondary air spray pipe and an overhead curtain secondary air spray pipe which are located at the top of the main combustion chamber and the top of the auxiliary combustion chamber correspondingly. A lower secondary air pipe is connected with the lower secondary air bellow. An upper secondary air pipe is connected with the overhead central secondary air spray pipe and the overhead curtain secondary air spray pipe. An induced draft fan outlet smoke main pipe is provided with a recycling backdraft smoke main pipe, and the backdraft smoke main pipe is connected with a primary air fan inlet air pipe and a secondary air fan inlet air pipe. A primary air backdraft smoke valve is arranged between the backdraft smoke main pipe and the primary air fan inlet air pipe. A secondary air backdraft smoke valve is arranged between the backdraft smoke main pipe and the secondary air fan inlet air pipe. The smoke backdraft multi-flow low-NOx horizontal circulating fluidized bed boiler has the advantages of being high in combustion efficiency, low in NOx generation amount, reliable in operation and the like.

Description

technical field [0001] The present invention relates to a circulating fluidized bed combustion equipment, in particular to a multi-process low NOx horizontal circulating fluidized bed combustion equipment for flue gas backburning, which belongs to low-emission coal, solid waste, urban and industrial sludge, Combustion equipment for solid fuels such as biomass is especially suitable for circulating fluidized combustion of solid fuels that require ultra-low NOx original emissions. Background technique [0002] At present, the main combustion equipment for solid fuels such as coal, solid waste, sludge, and biomass in my country are chain furnaces, water-cooled vibrating grate boilers, and circulating fluidized bed boilers. Each type of furnace has its own characteristics. [0003] Circulating fluidized bed boiler is an efficient and clean combustion technology developed in recent years. It has wide fuel adaptability and can burn high-quality coal, low-quality coal, solid waste,...

Claims

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Application Information

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IPC IPC(8): F23C10/06F23C10/10F23C10/18F23C10/26
CPCF23C10/06F23C10/10F23C10/18F23C10/26F23C2206/10F23C2201/30F23C2202/00Y02E20/34
Inventor 李清海张衍国初雷哲张哲
Owner TSINGHUA UNIV
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