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Circulating fluidized bed boiler for 20t/h efficient burning Fujian anthracite

A circulating fluidized bed and anthracite technology, applied in the field of boiler combustion, can solve the problems of low combustion efficiency, achieve the effect of increasing furnace temperature, increasing oxygen concentration and particle concentration, and prolonging residence time

Inactive Publication Date: 2012-12-12
JIMEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a 20t / h circulating fluidized bed boiler for burning Fujian anthracite with high efficiency. Reduce the power cost and pollutant control cost of the enterprise, save energy and reduce emissions

Method used

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  • Circulating fluidized bed boiler for 20t/h efficient burning Fujian anthracite
  • Circulating fluidized bed boiler for 20t/h efficient burning Fujian anthracite
  • Circulating fluidized bed boiler for 20t/h efficient burning Fujian anthracite

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Embodiment Construction

[0028] like figure 1 As shown, the present invention is a 20t / h high-efficiency circulating fluidized bed boiler for burning Fujian anthracite, which includes a membrane water-cooled hearth 1, an adiabatic cyclone separator 15, a feeding system 12, an upper drum 17, and a lower boiler Tube 20, S-shaped flue 18 and shaft flue 19.

[0029] The upper part of the dense-phase area of ​​the membrane-type water-cooled hearth 1 is equipped with a 2m-high hygienic belt 31, and the middle part of the dilute-phase area is equipped with a 2m-high hygienic belt 32 to keep the furnace at a higher temperature. A guard combustion belt 31 is laid on the upper part of the dense phase area of ​​the furnace 1 or a guard combustion belt 32 is only laid in the middle of the dilute phase area. The furnace outlet 2 is connected to the side opening of the adiabatic cyclone separator 15, and its upper central outlet tube 16 communicates with the S-shaped flue 18, and the outlet of the S-shaped flue 18...

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Abstract

The invention discloses a circulating fluidized bed boiler for 20t / h efficient burning Fujian anthracite. The circulating fluidized bed boiler is characterized in that a refractory belt is laid on the upper portion of a hearth dense-phase area or / and in the middle of a dilute phase area; secondary air is fed in through two or more than two groups of nozzles, each group of nozzles comprise four nozzles which are placed at four corners of a hearth respectively, and the secondary air is in tangent circuit arrangement on the same horizontal plane or staggered-layer tangent circuit arrangement; and a hearth combustion chamber is of a thin high structure. According to the technical scheme, the circulating fluidized bed boiler can well adapt to burning of the Fujian anthracite and guarantees that the Fujian anthracite can be on fire stably and is high in burn-off rate. The circulating fluidized bed boiler is simple to achieve, and small and medium boiler of the same kind can be widely applied to industries of chemical engineering, papermaking, printing and dyeing and foods and the like which all need steam heating.

Description

technical field [0001] The invention belongs to the technical field of boiler combustion, in particular to a 20t / h circulating fluidized bed boiler for burning Fujian anthracite with high efficiency. Background technique [0002] The main energy resource in Fujian Province is coal. The proven coal reserves are about 1.5 billion tons, of which anthracite accounts for 98.3%. Fujian anthracite has unique combustion properties, which are mainly reflected in: (1) extremely low volatile content (Var<4%); (2) high ignition point temperature, generally around 600°C; (3) high degree of carbonization, long burning time, It is not easy to burn out; (4) The ash melting point is low, and it is easy to coke; (5) The content of coal fine powder is large, and the weight percentage of particles with a particle size of less than 1.0mm is more than 47%. In addition, because Fujian anthracite coal is brittle and easy to burst, coal A large amount of fine powder will also be produced by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/10F23C10/18F23L9/00
Inventor 何宏舟赵龙飞
Owner JIMEI UNIV
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