Biomass and coal fluidized bed co-gasification equipment

Abstract

The invention provides biomass and coal fluidized bed co-gasification equipment, comprising a fluidized bed combustion inner barrel, a fluidized bed gasification outer barrel, a matched gas-solid separation system and a feed back system, wherein the fluidized bed combustion inner barrel and the fluidized bed gasification outer barrel are in an inner-and-outer barrel structure; two gasifying agent inlets are respectively positioned at the upper part and the lower part of the fluidized bed gasification outer barrel for enhancing the fluidization effect, so the gasification reaction is carried out sufficiently, meanwhile synthesis gas with different specific values of the volume fractions of H2 and CO is obtained through changing the proportion of CO2 and water vapor in the gasifying agent; two feeding ports are respectively led to the gasification outer barrel and the combustion inner barrel, and the reaction process can be controlled through adjusting the feeding quantity; and an inertia separator is adopted, the circulation volume of material is controlled through adjusting the intake volume of compressed air and the intake volume of lower L-valve pushing gas, and the interference caused by other factors is avoided. The co-gasification equipment is simple in structure, high in thermal efficiency, simple and convenient to control and has superior flexibility.

Description

technical field [0001] The invention relates to a fluidized bed coal gasification equipment, in particular to a gasification equipment used for the co-gasification of biomass and coal fluidized bed. Background technique [0002] Biomass gasification is one of the important ways to utilize biomass, but there are some deficiencies in the separate gasification of biomass. First, the supply of biomass is affected by the season, and the scale of separate gasification is limited; The formed particles are irregular, and it is difficult to form a stable material layer in the fluidized bed gasifier, and because the gasification temperature is low, the generated gas has a large tar content, and it is difficult to operate stably. Co-gasification of biomass and coal can make up for the seasonal defects of biomass supply, and can increase the gasification temperature to promote the further decomposition of biomass tar. [0003] The development of a gasification process with low tar yiel...

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Problems solved by technology

[0009] The present invention improves the existing biomass and coal fluidized bed co-gasification equipment, and further solves the problem that raw materials and circulating materials are mixed into the gasification chamber in the inertial separator, and the raw material intake and adjustment of the gasification chamber cannot be effectively controlled and adjusted. The amount of material circulation is high, and the feed at the upper L valve is prone to blockage; the water vapor inlet is located at the lower part of the gasification chamber, and the gasification reaction of the circulating material sent into the combustion chamber is not sufficient, thus providing a fluidization method for biomass and coal Equipment for bed co-gasification process

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