Equipment and method for continuous preparation of biochar

Abstract

The invention discloses a device and a method for continuously preparing charcoal, which relate to the field of comprehensive utilization of forestry and agricultural residue resources. The device comprises a hollow annular furnace body, wherein a material feeding and discharging chamber is communicated to the outer side of the annular furnace body; a material transferring track is commonly arranged in the annular furnace body and the material feeding and discharging chamber; a feeding and discharging end of the material transferring track parallelly penetrates through the material feeding and discharging chamber to the outside; a material tank automatically enters the material feeding and discharging chamber through the material transferring track, and is preheated in the material feeding and discharging chamber; the preheated material tank enters the annular furnace body so as to be carbonized; the carbonized material tank automatically enters the material feeding and discharging chamber through the material transferring track; at the moment, the carbonized material tank preheats forestry and agricultural residues in a non-carbonized material tank, the carbonized material tank is conveyed outside the material feeding and discharging chamber through the material transferring track, and finally, the charcoal in the material tank is taken out. The device provided by the invention can be used for continuously producing without the need for flameout, the production efficiency is high, and the carbonization energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of agricultural and forestry waste resources, in particular to a device and method for continuously preparing biochar. Background technique [0002] Biochar is a kind of highly aromatized refractory solid material produced by pyrolysis and carbonization of biomass materials under the condition of complete or partial anoxic, with remarkable surface porosity, large specific surface area and high surface can. There are few polar functional groups on the surface of biochar, and the main groups include carboxyl, phenolic hydroxyl, carbonyl, lactone, pyrone, acid anhydride, etc., which constitute the good adsorption characteristics of biochar. [0003] my country's annual output of agricultural and forestry waste is about 1.4 billion tons, of which the straw output of corn, rice, wheat and other staple crops alone reaches 650 million tons, but the amount of straw returned to the field accounts ...

AI Technical Summary

Problems solved by technology

However, most of these equipments are produced in batches and cannot continuously carbonize biomass. There is a problem of high carbonization energy consumption, and there are also deficiencies in tail gas recovery and utilization.

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