Treatment method of wood processing residues and charcoal prepared thereby

A technology for processing residues and treatment methods, which is applied in the field of dry distillation of charcoal, gas products, and wood processing residues. It can solve problems such as limited use occasions, scattered layout, and incomplete carbonization, so as to improve energy utilization and produce Ease of use and environmental protection

Active Publication Date: 2010-01-20
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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 flu

Method used

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  • Treatment method of wood processing residues and charcoal prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The coniferous wood shavings left over from wood processing are used as raw materials, wherein the particle size of the coniferous shavings: 10-40mm; moisture content: 10-16%.

[0046] 1) Crushing and screening of raw materials

[0047] Screen coniferous wood shavings, and send particles with an equivalent volume diameter ≤ 30mm directly into the carbonization furnace; for particles with an equivalent volume diameter greater than 30mm, they are pulverized by a pulverizer to make their equivalent volume diameter ≤ 30mm and then sent to the carbonization furnace , wherein the weight of particles with an equivalent volume diameter < 5 mm accounts for 20% of the total weight of the remainder; the weight of particles with an equivalent volume diameter within the range of 5-20 mm accounts for 50% of the total weight of the remainder;

[0048] 2) Carbonization

[0049] Heat the carbonization furnace to increase the temperature in the carbonization furnace to 500°C, and keep t...

Embodiment 2

[0058] In addition to the weight of particles with an equivalent volume diameter of 3 / kg (wood), that is, every 1kg of wood passes through 2.0m 3 air, the carbonization time is 2h; the weight ratio of solid particles and sodium phosphate in the mechanism carbon preparation process is 75:25, the rest is the same as that of Example 1.

[0059] The performance index of the prepared formed carbon was tested according to the national standard GB / T17664-1999, and the test results are shown in Table 1.

Embodiment 3

[0061] In addition to the weight of particles with an equivalent volume diameter of 3 / kg (wood), that is, every 1kg of wood passes through 3.5m 3 air, and the carbonization time was 2 hours; the weight ratio of solid particles and potassium sulfate in the process of machine-made carbon preparation was 95:5, and the rest were the same as in Example 1.

[0062] The performance index of the prepared formed carbon was tested according to the national standard GB / T17664-1999, and the test results are shown in Table 1.

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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 ...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10L5/44
CPCY02E50/32Y02E50/30Y02E50/14Y02E50/10
Inventor 冯小江何正斌姚雪莉王冬琨
Owner BEIJING FORESTRY UNIVERSITY
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