Biomass solid wastewater thermal pretreatment coupling gasification method based on regulation and control of microcrystalline structure

Abstract

The invention relates to a biomass solid wastewater thermal pretreatment coupling gasification method based on regulation and control of a microcrystalline structure. The method comprises the following steps: carrying out hydrothermal carbonization pretreatment on wood fiber biomass wastes and water at different temperatures and time in a high-pressure reaction kettle according to a certain mass ratio; carrying out X-ray diffraction analysis on the solid product hydrothermal carbon to obtain microcrystalline structure information; carrying out a water vapor gasification experiment on the hydrothermal carbon in a fixed bed reactor, and analyzing gasification characteristics on line; associating the gasification result with the microcrystalline structure of the hydrothermal carbon, and providing a method for describing the gasification characteristics of the raw material through the microcrystalline structure. Compared with direct gasification of wood fiber biomass waste, the method has the advantages that the raw materials do not need to be dried in advance, the energy density and the heat value of the hydrothermal carbon are increased through the hydrothermal pretreatment process, the yield and the H2 / CO of the hydrothermal carbon gasification synthesis gas are increased, and directional regulation and control of the efficient gasification process are achieved.

Description

technical field [0001] The invention relates to the technical field of biomass resource treatment, in particular to a biomass-solid waste water thermal pretreatment coupled gasification method based on regulation and control of microcrystalline structure. Background technique [0002] Gasification is a common thermal conversion technology. At a certain temperature, a series of reactions occur between the sample and the gasification agent (usually one or more of air, water vapor or carbon dioxide), and CO and H can be obtained. 2 Mainly synthetic gas. The direct gasification of woody biomass waste has the problems of low energy density, non-uniform scale, uneven heat and mass transfer, and the raw materials need to be dried in advance. [0003] Hydrothermal carbonization is a common pretreatment method. It usually uses biomass materials as raw materials and water as solvent and reaction medium. Under certain temperature and pressure, hydrolysis, polycondensation, aromatizati...

AI Technical Summary

Problems solved by technology

Compared with sludge, kitchen waste and other components in municipal solid waste, the cellulose, hemicellulose and lignin components contained in lignocellulosic biomass solid waste are more difficult to transform during hydrothermal carbonization, and the hydrolysis, Reactions such as polycondensation will lead to changes in crystallinity in the structure of hydrothermal charcoal, affecting its gasification characteristics

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