Pretreatment method of cellulosic ethanol raw materials

A cellulosic ethanol, pretreatment technology, applied in fiber raw material processing, textile and papermaking, etc., can solve problems such as affecting treatment

Active Publication Date: 2014-07-02
COFCO NUTRITION & HEALTH RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, more inhibitors (acetic acid, furfural, etc.

Method used

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  • Pretreatment method of cellulosic ethanol raw materials

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0033] The present invention provides a kind of pretreatment method of cellulosic ethanol raw material, wherein, this pretreatment method comprises the following steps:

[0034] Step 1. Add the cellulose raw material to the screw feeder 20 for extrusion dehydration to remove at least a part of the water content of the cellulose raw material, so as to obtain a dense plug. The weight of the dry matter in the plug is The ratio is 20% to 50%;

[0035] Step 2, feeding the plug into the primary steam container 30, then breaking it up, and performing primary steam treatment on the dispersed cellulose raw material, the pH value of the steam in the primary steam contain...

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Abstract

The invention discloses a pretreatment method of cellulosic ethanol raw materials. The pretreatment method is characterized in comprising following steps: step 1, cellulose raw material is delivered into a screw feeder (20) for squeeze dehydration so as to remove at least a part of water of the cellulose raw material and obtain a compact product, wherein dry substance content of the compact product accounts for 20 to 50wt%; step 2, the compact product is delivered into a first-stage steam receiver (30), and is scattered, and the scattered cellulose raw material is subjected to first-stage steam treatment, wherein pH value of steam in the first-stage steam receiver (30) is lower than 7; and step 3, the cellulose raw material processed via first-stage steam treatment is delivered into a second-stage steam receiver (40) for second-stage steam treatment. The pretreatment method is used for pretreatment of cellulose raw material so as to reduce energy consumption; and the amount of inhibition substances generated when the cellulose raw material is subjected to steam treatment can be reduced; and recovery rate of cellulose and recovery rate of hemicellulose are increased.

Description

technical field [0001] The invention relates to the field of cellulosic ethanol production, in particular to a pretreatment method for cellulosic ethanol raw materials. Background technique [0002] Energy and environmental issues are issues that must be resolved to achieve sustainable development. In the long run, the shortage of liquid fuel will be a big problem that plagues human development. Against this background, biomass is gaining increasing attention as the only renewable resource that can be converted into liquid fuels. Therefore, the technology of producing liquid fuel from biomass has great development prospects, and the technology of producing fuel ethanol from biomass has attracted much attention. Existing industrialized fuel ethanol production uses sugar or grain as raw material. The advantage is that the process is mature, but the output is limited by the raw material, so it is difficult to meet the energy demand for a long time. [0003] In the long run, ...

Claims

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Application Information

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IPC IPC(8): D21C5/00
Inventor 岳国君李北李春玲魏拥辉李杰孙岩王广霞彭霞林海龙武国庆邓立康许克家杜伟彦高尚
Owner COFCO NUTRITION & HEALTH RES INST
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