A method for comprehensive utilization of lignocellulose

Abstract

A comprehensive utilization method of lignocelluloses comprises the following steps: performing acidation pretreatment on lignocelluloses with phosphoric acid solution; adopting microwave as a heat source of a pyrolytic reaction so as to exert an auxiliary function of accelerating the organic reaction; controlling the progress of the reaction through regulating the temperature of the lignocelluloses pyrolytic reaction via controlling the microwave power; condensing and collecting liquid pyrolysis products acetic acid and furfuraldehyde according to phrases; extracting the residual biomass semicoke through water-ultrasonic extraction to obtain carbohydrate and plant nutrition salt; manufacturing low sulfur smoke-free biomass honeycomb briquette through biomass semicoke. According to the invention, three main components of the lignocelluloses biomass are subject to pyrolysis according to chemical reactivity; the probability of secondary condensation reaction of the pyrolysis product and the difficulty in follow-up separation are both reduced; the manufacturing technology saves energy and is efficient; no 'three wastes' are generated; a new approach is provided for compositive and efficient utilization of bulk and cheap biomass of agriculture and forestry.

Description

technical field [0001] The invention belongs to the technical field of biomass refining engineering. It involves comprehensive utilization of lignocellulose. Background technique [0002] With the depletion of fossil energy, human beings have to face the increasingly serious energy crisis and chemical resource crisis. Searching for clean and renewable energy and green chemicals has become the focus of research in various countries. Biomass resources, as a cheap, easy-to-obtain and widely sourced renewable resource, have great potential for development and application. Researchers from all over the world have conducted active exploration and experimental research on the utilization of biomass resources, and have achieved certain research results. . However, these studies often focus on a certain aspect of the utilization of biomass resources, which belongs to the way of "separate efforts" and does not comprehensively utilize biomass resources. Therefore, the present invent...

AI Technical Summary

Problems solved by technology

The traditional furfural industry is a resource-consuming, labor-intensive, and environment-polluting industry. The production scale of furfural manufacturers in my country is generally small, and most of them are produced by one-step hydrolysis of sulfuric acid. A large amount of waste residues are produced during the process, or they are discharged randomly, or directly burned, all of which have caused huge environmental pollution problems. Therefore, furfural production enterprises in my country are facing huge environmental protection problems, and the furfural industry is in urgent need of technological upgrading.

Although there are some improvement measures for the above problems at present, such as the invention patent application number 200810305612.6 "No pollution production of furfural, acetic acid, activated carbon energy-saving new process", but still use dilute sulfuric acid impregnation, high-pressure steam hydrolysis, mixed collection of crude aldehyde vapor, The problems of high energy consumption, high water consumption and high emission are still prominent in processes such as fractional distillation and high-temperature carbonization