Integrated method for preparing xylose mother liquor from biomass through hydrolysis and of compression molding of residues

Abstract

The invention relates to an integrated method for preparing xylose mother liquor from biomass through hydrolysis and for dehydration and compression molding of residues. In a reactor capable of realizing continuous hydrolysis, extrusion dehydration and compression molding of biomass, the biomass is hydrolyzed to produce xylose at first, then undergoes extrusion to remove water and is then subjected to compression molding so as to obtain xylose mother liquor and a compression-molded fuel brick. The method realizes integrated operation of hydrolysis, dehydration and compression molding of biomass raw materials, and can continuously produce xylose mother liquor and the compression-molded fuel brick. The method is advanced in that removal of hemicellulose from biomass, preparation of xylose and dehydration and compression molding of hydrolysis residues are realized at the same time. Through hydrolysis, hemicellulose in the biomass is removed and converted into xylose on one hand; and on the other hand, the interior structure of biomass is opened, lignin is softened, and biomass can be more easily compressed and bonded. Through compression molding, moisture and dissolved xylose are extruded on the one hand, and the compression-molded fuel brick is formed on the other hand.

Description

technical field [0001] The invention relates to a process method for synchronous solid-liquid separation and synchronous compression molding of biomass hydrolysis to produce xylose and hydrolysis residue, which belongs to the technical field of energy and chemical industry. Background technique [0002] There are many reasons why lignocellulose conversion and utilization have not been industrialized for a long time. The main reasons are: ①The straw is scattered, has a small bulk density, and is flammable, which makes it difficult to collect and store; ②The energy density of biomass straw is relatively low. ③ The structure of cellulose, hemicellulose and lignin in biomass straw makes it difficult to be digested and decomposed, and it needs to be pretreated to improve the conversion utilization rate. ④In ethanol production, the hexose sugar hydrolyzed by cellulose can be utilized by microorganisms, but the xylose produced by hemicellulose hydrolysis cannot be utilized, resulti...

AI Technical Summary

Problems solved by technology

[0002] There are many reasons why lignocellulose conversion and utilization have not been industrialized for a long time. The main reasons are: ①The straw is scattered, has a small bulk density, and is flammable, which makes it difficult to collect and store; ②The energy density of biomass straw is relatively low. The energy consumption for processing is relatively high; ③The structure of cellulose, hemicellulose and lignin in biomass straw makes it difficult to be digested and decomposed, and it needs to be pretreated to improve the conversion utilization rate

④In ethanol production, the hexose sugar hydrolyzed by cellulose can be utilized by microorganisms, but the xylose produced by hemicellulose hydrolysis cannot be utilized, resulting in low ethanol yield

This method requires N (N ≥ 2) sets of hydrolysis equipment and solid-liquid separation devices to operate together, and the hydrolysis and solid-liquid separation are carried out separately, the equipment and process are complicated, and it is not possible to directly obtain compressed molding blocks

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