Circulating fluidized bed boiler system

Abstract

The invention discloses a circulating fluidized bed boiler system. The circulating fluidized bed boiler system comprises a hearth and a hearth bed surface arranged at the bottom of the hearth, whereinthe hearth bed surface is communicated with a primary air chamber for blasting air; the top of the hearth is communicated with a separator device for separating high-temperature flue gas; the bottomof the separator device is communicated with the bottom of the hearth; a secondary air inlet is formed in the lower part of the side wall of the hearth; a fuel inlet for supplementing fuel powder is formed in the side wall of the hearth between the secondary air inlet and the hearth bed surface; pulverized coal directly falls onto the bed surface through the fuel inlet and heaps up to form a combusting dense phase region, so that the problem that effective combustion is difficultly formed because the pulverized coal is directly blown into the separator by inlet air is avoided and combustion ofthe pulverized coal is more thorough; in addition, through a circulating action of the separator, the thoroughness of combustion and the controllability of the combustion environment in the furnace are improved, the harmful substance content of emitted waste gas is reduced, and thus the technical problems that the existing circulating fluidized bed boiler difficultly meets novel technical requirements on low emission and high-efficiency combustion and the like are solved.

Description

technical field [0001] The invention relates to the technical field of boiler equipment, more specifically, to a circulating fluidized bed boiler system. Background technique [0002] With the continuous improvement of the country's air pollution emission requirements, the pollution emission of circulating fluidized bed boilers is a part of air pollution, and more stringent requirements are put forward. It is necessary to reduce the original pollutant emissions of circulating fluidized bed boilers and control the combustion temperature. And the control of the circulating ash amount puts forward higher requirements, that is, the combustion organization of the entire circulation system should adapt to the new requirements of low emissions. [0003] The inventors found that when the coal particle size is 0-3mm as the fuel, it can better meet the combustion organization of the circulation system, create a better combustion environment, and meet the requirements of reducing the o...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a circulating fluidized bed boiler system, the structural design of the circulating fluidized bed boiler system can effectively solve the problem that existing circulating fluidized bed boilers are difficult to meet the new technology of low emission and high efficiency combustion Technical issues such as requirements

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