Reactor capable of pretreating high-solid-content lignocelluloses raw materials

Abstract

The invention relates to a reactor capable of pretreating high-solid-content lignocelluloses raw materials. A kettle body is provided with a mechanical stirring device comprising an external motor and combined stirring paddles. The reactor is characterized in that the combined stirring paddles are spiral band paddles and a bottom scraping paddle; the spiral band paddles are fixed on a stirring shaft by a support rod, and are hovered at the periphery of the stirring shaft from top to bottom so as to form a frame body; the bottom scraping paddle is fixed on the bottom end of the stirring shaft, and is close to the bottom of the kettle body; the bottom scraping paddle is a paddle-type or anchor-type paddle. The reactor provided by the invention has the advantages that mechanical stirring can enhance the heat transfer and mass transfer among materials, high-temperature steam and chemical reagents, improve the heating efficiency of steam, and reduce energy consumption; moreover, the spiral band stirring paddles can pretreat high-solid-content lignocelluloses raw materials, so that the water using quantity of the pretreatment process and the even the whole bio-refinery process can be reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of chemical reactors, in particular to a stirring reactor capable of pretreating lignocellulose raw materials with high solid content. 【Background technique】 [0002] Pretreatment is the first step and the most important link in the bioprocessing process of lignocellulosic raw materials, because the energy consumption and pretreatment effect of the pretreatment process directly determine the yield of the final product and the cost of the entire bioprocessing process. The purpose of pretreatment is to change the dense structure of natural lignocellulose, destroy the chemical and physical connection between cellulose, lignin and hemicellulose, reduce the crystallinity of cellulose, or remove lignin, and increase the looseness of raw materials To increase the effective contact between cellulase and cellulose, thereby increasing the yield of subsequent saccharification and fermentation. [0003] At present, a...

AI Technical Summary

Problems solved by technology

[0003] At present, although researchers have developed many pretreatment methods, and some of them have been initially applied to pilot or demonstration devices for lignocellulose bioprocessing, most pretreatment techniques are still simple amplification of laboratory techniques, mainly Defects in two aspects: First, these pretreatment technologies lack stirring devices, resulting in insufficient contact / mixing of high-temperature steam in the pretreatment process with materials or chemical reagents, and a temperature gradient exists in the pretreatment reactor, resulting in excessive local temperatures or overacidity, causing excessive degradation of lignocellulosic raw materials and generating a large number of inhibitors, which have serious adverse effects on subsequent enzymatic hydrolysis and fermentation; secondly, most of the existing pretreatment technologies can only process lignocellulose with low solid content Raw materials are pretreated, resulting in a large amount of water and wastewater in the pretreatment process, which greatly increases the cost of the pretreatment process and bioprocessing, and is not conducive to the subsequent high-solid content saccharification and product fermentation

Images