A kind of wood carbonization processing method and equipment

Abstract

A wood carbonization treatment method, the steps are: (1) Palletizing wood in a carbonization box for balanced moisture content treatment, the temperature in the carbonization box is 60-120°C, the humidity is 100%RH, the operation time is 96 hours, and the temperature is divided into stages Rise; (2) Dry the wood, the temperature in the carbonization box is 100-120°C, the humidity is 100-20%RH, the humidity gradient decreases, and the working time is 72 hours; (3) The wood is carbonized, and the carbonization box is The temperature is raised from 120°C to the carbonization temperature of 190-220°C, increasing by 10°C every 2 hours; the carbonization speed is 10mm / hour; (4) After the carbonization treatment is completed, the ambient temperature in the carbonization box is increased from 150°C to above 150°C by adding steam to humidify. Gradually drop to 60°C; when the temperature of the carbonization box is close to the outdoor temperature, just take out the wood. The method adjusts the ratio of hot air and water vapor in the warm and humid air flow to achieve the purpose of thermal modification of wood.

Description

technical field [0001] The invention relates to the technical field of wood thermal modification treatment, in particular to a wood carbonization treatment method and equipment used. Background technique [0002] Wood is mainly composed of cellulose and hemicellulose. Cellulose acts as a skeleton in the wood cell wall, and its chemical properties and supramolecular structure have an important impact on the strength of wood. The hydroxyl groups in cellulose and water molecules can also form hydrogen bonds, and the hydrogen bonds between the hydroxyl groups in different parts directly affect the moisture absorption and desorption process of wood. A large number of hydrogen bonds can improve the strength of wood, reduce hygroscopicity, reduce chemical reactivity, etc., and the hygroscopicity of cellulose directly affects the dimensional stability and strength of the limit. After the wood is carbonized, the concentration of hydroxyl groups is reduced, and the chemical structure...

AI Technical Summary

Problems solved by technology

[0004] However, most of the currently disclosed wood carbonization technologies can only carbonize the surface of wood, and cannot carbonize wood deeply, so that after a long time of use, the wood will expand or deform and crack; even if it can carbonize wood deeply The carbonization is not uniform, the carbonization effect is poor, and the energy consumption is high

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