Composite heating type moving bed pyrolytic reaction device of coal with wide particle size distribution

Abstract

The invention provides a composite heating type moving bed pyrolytic reaction device of coal with wide particle size distribution. The composite heating type moving bed pyrolytic reaction device of the coal with wide particle size distribution comprises a charging opening, a combustion heating chamber, a semicoke outlet and an internal component moving bed pyrolyzing furnace; multiple stages of internal components are arranged in the internal component moving bed pyrolyzing furnace to form channels for solid particles to move from top to bottom; and coal particles enter the channels formed byeach stage of internal component from the charging opening to move downwards and are discharged from the semicoke outlet. The composite heating type moving bed pyrolytic reaction device of the coal with wide particle size distribution is characterized in that each stage of internal component has a structure with an inner cavity; circulating medium connecting pipes are connected among all stages ofinternal component; a circulating medium enters the uppermost layer of internal component from a circulating medium inlet, enters the inner cavity of a next stage of internal component step by step through the circulating medium connecting pipes, and is discharged through a circulating medium outlet; and the high-temperature medium in the internal component transfers heat to the coal particles and rapidly heats the coal particles together with an external heat source, so the yield of pyrolytic tar is increased and the problem of low heating speed in an external heat type heating mode is effectively solved.

Description

technical field [0001] The invention relates to the field of energy and chemical industry, in particular to a compound heating type moving bed pyrolysis reaction device for coal with wide particle size distribution. Background technique [0002] At present, the pyrolysis process can extract the hydrogen-rich components contained in coal and convert them into gas and tar, and the semi-coke will be sent to the boiler for combustion to generate electricity, which will greatly improve the resource utilization level and comprehensive utilization value of coal. [0003] A variety of coal pyrolysis technologies have been developed successively at home and abroad, and significant progress has been made in promoting the industrialization of coal pyrolysis technology; such as the foreign rotary furnace pyrolysis Toscoal technology, the COED technology that uses multi-stage fluidized Lurgi-Ruhrgas solid heat carrier technology of moving bed and ECOPRO pulverized coal rapid pyrolysis pr...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is, in order to be able to process low-priced coal with wide particle size distribution, and to solve the problem of slow mass transfer and heat transfer rate of wide particle size distribution coal in the reactor, and the long residence time of volatile matter in the high temperature zone leading to secondary reactions Serious problems, such as pyrolysis tar yield and quality are poor, to provide a compound heating moving bed pyrolysis device suitable for coal with wide particle size distribution

Images