Composite combustion circulating fluidized bed

Abstract

The invention discloses a composite combustion circulating fluidized bed. The composite combustion circulating fluidized bed comprises an automatic control electric cabinet, a pulverizer, a hearth ofthe fluidized bed, a chimney, a flue for connecting the chimney and the hearth, hot air pipes, a powder pipe and a gas-powder mixing structure. The powder pipe comprises a main powder pipe and a branch powder pipe, and the main powder pipe is connected with the pulverizer and the branch powder pipe. One hot air pipe is communicated with the pulverizer and the flue, and the other two hot air pipesconnect the flue with the gas-powder mixing structure. The gas-powder mixing structure is used for mixing powder conveyed by the branch powder pipe and high-temperature flue gas conveyed by the hot air pipes and then spraying the mixture onto the two sides of the hearth. The flue is communicated with the chimney through an induced draft fan, the chimney is provided with an oxygen meter used for detecting the oxygen content in exhausted waste gas, and the hearth is further provided with a steam pressure meter used for detecting the steam pressure in the hearth. And the automatic control electric cabinet is respectively connected with the pulverizer, the gas-powder mixing structure, the induced draft fan, the steam pressure meter and the oxygen meter. The composite combustion circulating fluidized bed has the advantages of high combustion intensity, high temperature rise speed and high heat efficiency.

Description

technical field [0001] The invention relates to the technical field of composite combustion, in particular to a composite combustion circulating fluidized bed. Background technique [0002] At present, the combustion methods of industrial boilers basically have the following methods: [0003] 1. The chain furnace reciprocating furnace is the main solid-phase combustion method. The thermal efficiency is the lowest in the use of industrial boilers. The national standard only requires a thermal power of 75%. [0004] 2. The other is a circulating fluidized bed, which belongs to fluidized combustion, and has a better thermal efficiency, which can reach more than 80%. [0005] 3. The last one is powder combustion, which is homogeneous combustion. It is the most efficient combustion method at present, with a thermal power of more than 90%. [0006] The biomass gasifier developed in the past 10 years, that is, gasification combustion, has a thermal power of only about 50%, and pr...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a combined combustion circulating fluidized bed, aiming to solve the technical problems of low thermal power of the gasification combustion mode of the existing industrial boilers, and the exhaust gas discharge is not up to standard

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