Treatment method of wood processing residues and charcoal prepared thereby

Abstract

The invention relates to a treatment method of wood processing residues, a method for preparing machine-made charcoal by utilizing the wood processing residues and the machine-made charcoal prepared by the method. The treatment method of the wood processing residues comprises the steps of carrying out carbonization treatment and obtaining the charcoal and combustible gas, wherein, the carbonization temperature for carbonization treatment is 400-900 DEG C, the time of carbonization treatment is 0.5-4 hours, and air of less than 4m<3> is introduced into each 1kg of the wood processing residues during the process of carbonization treatment. The treatment method can improve the energy utilization rate of the wood processing residues and reduce environmental pollution; the treatment method adopts the way of firstly carrying out the carbonization and then carrying out molding for preparing the charcoal, thereby greatly reducing energy consumption of wood wastes during direct compression molding and carrying out the thorough carbonization; the treatment method does not produce black smoke during ignition, and the performance indicators of the machine-made charcoal are in line with the requirements of standard of first-grade charcoal of national standard GB / T17664-1999.

Description

technical field [0001] The patent of the present invention relates to a dry distillation method for cellulose-containing materials and products prepared by the method, in particular to a dry distillation method for wood processing residues and charcoal and gas products produced by the treatment method. Background technique [0002] Wood processing residues (including: sawdust, shavings, edges, cut ends, etc.) are inevitable products in the production process of wood products. Conditional enterprises generally use these residues for wood-based panel production. However, there are also many small and medium-sized enterprises that are inconvenient to concentrate the residues due to scattered layout, and some residues are not suitable for wood-based panel production. A large amount of wood processing residues are directly used as fuel. However, direct combustion of wood processing residues has the following disadvantages: (1) the combustion efficiency is very low, generally no ...

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Problems solved by technology

However, there are also many small and medium-sized enterprises that are inconvenient to concentrate the residues due to scattered layout, and some residues are not suitable for wood-based panel production. A large amount of wood processing residues are directly used as fuel

However, direct combustion of wood processing residues has the following disadvantages: (1) the combustion efficiency is very low, generally no more than 15%, and the energy waste is serious; (2) the volatile content of wood fuel is very high, and when the combustion is incomplete, a large amount of volatile It is discharged into the indoor and outdoor environment together with the flue gas, which not only directly endangers human health, but also pollutes the atmospheric environment; (3) It is inconvenient to store and use, and the use occasions are limited

[0013] Although adopting the process of first carbonizing and then pressing can reduce production energy consumption and reduce the degree of pollution to the environment, there are still incomplete carbonization in the preparation of machine-made carbon by the above-mentioned preparation method, the yield of the prepared machine-made carbon is low, and the carbonization time is long. Low efficiency, low carbon content, high ash content and low calorific value of the prepared carbon

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