Multipath circulating fluidized bed boiler

Abstract

The invention discloses a multipath circulating fluidized bed boiler, which comprises a main combustion chamber, an auxiliary combustion chamber and an ash chamber which are parallel to the main combustion chamber, a tail flue, and a coal economizer and a centrifugal separator arranged in the tail flue; the bottom of the auxiliary combustion chamber is inclined to the ash chamber and the inclination angle alpha is between 30 and 60 degrees; the bottom of the ash chamber is inclined to the auxiliary combustion chamber and the inclination angle beta is between 45 and 75 degrees; a material falling passage is reserved between the bottom surface of the ash chamber and the bottom surface of the auxiliary combustion chamber; an asymmetrical inertia separation circulating device is formed by the bottom surfaces of the mutually inclined auxiliary combustion chamber, an inclined plate I and an inclined plate II fixed on the two sides, and the material falling passage; a flow area of the bottom of the ash chamber A2 is no more than half of a flow area A1 of the bottom of the auxiliary combustion chamber; and the bottom surface of the ash chamber is provided with a loose blast cap. The multipath circulating fluidized bed boiler can ensure the smooth conveying of materials and the required material separating amount, prevent the materials from accumulating on the bottom of the combustion chambers for a long time, and ensure smooth circulating, so that a combustion device normally operates for a long term.

Description

technical field [0001] The invention relates to a multi-process circulating fluidized bed boiler, in particular to a miniaturized circulating fluidized bed combustion equipment, which belongs to the combustion equipment of inferior fuels such as inferior coal, solid waste, urban and industrial sludge or biomass. Background technique [0002] At present, the main combustion equipment for low-quality fuels such as low-quality coal, solid waste, urban and industrial sludge, and biomass in my country are chain furnaces and circulating fluidized bed boilers. Different furnace types have different fuels for their combustion. Requirements also have their own advantages and disadvantages. [0003] Circulating fluidized bed technology is an efficient and clean combustion technology with wide fuel adaptability. It can burn high-quality coal, low-quality coal, solid waste, biomass and other fuels. Its combustion efficiency is high, and it can carry out pollution control operations such...

AI Technical Summary

Problems solved by technology

[0005] However, in the process of technology and equipment application, the design of the above-mentioned related components or equipment still needs to be improved, especially in terms of the structure of the auxiliary combustion chamber and the material separation device formed by it. It is easy to form material accumulation, and it is difficult to achieve better material separation effect

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