Method for utilizing hydrothermal carbonization for preparing biomass barbecuing charcoal

Abstract

The invention provides a method for utilizing hydrothermal carbonization for preparing biomass barbecuing charcoal. The method is characterized by comprising the following step one of hydrothermal carbonization reaction, wherein a biomass raw material is any one of wood flour, cotton stalks, rice hulls and coconut shells, the biomass raw material and water are placed into a reaction vessel according to the mass ratio of 1: (4-12), inert gas is introduced, the hydrothermal carbonization reaction is carried out on the anoxic condition, reaction temperature ranges from 250 DEG C to 450 DEG C, reaction pressure ranges from 4 Mpa to 5 Mpa, and reaction time ranges from 20 min to 40 min, so that carbonized biomass mixed liquid is obtained; the step two of solid and liquid separation, wherein the carbonized mixed liquid is separated by utilizing a filtering device for obtaining a carbonized substance; the step three of crushing and screening, wherein the carbonized substance is crushed and screened to obtain charcoal particles with the particle size smaller than 0.5 mm; the step four of compressing and forming, wherein the carbonized substance is formed in a hot-pressed mode, so that the biomass barbecuing charcoal is obtained.

Description

technical field [0001] The invention belongs to the field of civil solid fuels, and in particular relates to a method for preparing biomass barbecue charcoal by hydrothermal carbonization. Background technique [0002] With the improvement of the quality of life, people's requirements for the output and quality of charcoal during barbecue are constantly increasing. At the same time, the amount of agricultural and forestry waste produced in China every year is considerable, and many wastes cannot be effectively treated. Therefore, it is of great significance to use agricultural and forestry wastes to prepare biomass barbecue charcoal. [0003] The traditional method of preparing barbecue charcoal is to pyrolyze biomass under the condition of high temperature and oxygen deficiency. The charcoal particles obtained by this process lose the bonding performance of raw materials, and must be bonded and formed by adding a binder, which increases the Charcoal cost. [0004] In addi...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of preparing barbecue charcoal is to pyrolyze biomass under the condition of high temperature and oxygen deficiency. The charcoal particles obtained by this process lose the bonding performance of raw materials, and must be bonded and formed by adding a binder, which increases the Carbon production cost

[0004] In addition, the ash content of agricultural and forestry waste such as straw is very large. After pyrolysis, the ash is all deposited in the barbecue charcoal, which reduces its combustion performance. In addition, during the barbecue, the ash sticking to the food is not conducive to a series of problems such as the health of the griller.

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