Low-emissioncirculating fluidized bedboiler with characteristic of fuel and desulfurizer graded supply

A circulating fluidized bed and fuel classification technology, which is applied to fluidized bed combustion equipment, fuel burned in a molten state, and combustion methods, can solve the bottleneck of NOx emission reduction effects and achieve deep desulfurization and ultra-low NOx emissions , Realize the effect of NOx emission

Active Publication Date: 2017-06-13
TSINGHUA UNIV +1
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  • 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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  • Low-emissioncirculating fluidized bedboiler with characteristic of fuel and desulfurizer graded supply
  • Low-emissioncirculating fluidized bedboiler with characteristic of fuel and desulfurizer graded supply
  • Low-emissioncirculating fluidized bedboiler with characteristic of fuel and desulfurizer graded supply

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Embodiment Construction

[0021] The specific embodiment of the present invention and working process will be further described below in conjunction with accompanying drawing.

[0022] 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.

[0023] like figure 1 As shown, a low-emission circulating fluidized bed boiler with fuel and desulfurizer staged supply includes air distribution plate 1, main combustion chamber 8, auxiliary combustion chamber 9, burnout chamber 10, separator 11, connecting flue 12, Tail flue 13 , tail heating surface 14 , flue gas outlet 15 , feeder 16 . The main combustion chamber 8, the secondary combustion chamber 9 and the burnout chamber 10 are three combustion chambers arranged horizonta...

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Abstract

The invention provides a low-emission circulating fluidized bed boiler with the characteristic of fuel and desulfurizer graded supply. The low-emission circulating fluidized bed boiler comprises a main combustion chamber, an auxiliary combustion chamber, a burning-out chamber, a fuel graded supply device, a desulfurizer graded supply device and the like, wherein the fuel graded supply device is arranged in front of the main combustion chamber, the desulfurizer graded supply device is arranged in front of the main combustion chamber and above the fuel graded supply device; two auxiliary combustion chamber pulverized coal inlets are formed in two side walls of the auxiliary combustion chamber in a bilaterally symmetric manner; fine pulverized coal spray pipes are arranged in the bilaterally symmetric manner; a mass ratio of desulfurizers sent out froma coarse desulfurizer outlet and a fine desulfurizer outlet is 3:1-10:1, and mass of fuel sent to the auxiliary combustion chamber through an undersizedfine pulverized coal pipeline is 2%-20% of total mass of fuel in a coal hopper. The low-emission circulating fluidized bed boiler has the advantages as follows: fuel/air dual-graded combustion and solid fuel re-burning are realized, circulating times and retention time of the fuel and the desulfurizers in the bed are increased, ultralow NOxemission and deep desulfurization are realized and the like.

Description

technical field [0001] The invention relates to a circulating fluidized bed combustion equipment, in particular to a low-emission circulating fluidized bed combustion equipment for graded supply of fuel and desulfurizer, belonging to low-emission coal, solid waste, urban and industrial sludge, biomass Combustion equipment for solid fuels such as solid fuels, especially suitable for circulating fluidized combustion of solid fuels with high sulfur, high nitrogen and low emission requirements. 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/08F23C10/22
CPCF23C10/08F23C10/22
Inventor 李清海张衍国康建斌初雷哲
Owner TSINGHUA UNIV
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