Wood carbonization treatment method and device

Abstract

A wood carbonization treatment method comprises the following steps: (1) stacking wood in a carbonization box to carry out balanced water content treatment, wherein the temperature in the carbonization box is 60-120 DEG C, the humidity is 100% RH, the working time is 96 hours, and the temperature raises in stages; (2) drying the wood, wherein the temperature in the carbonization box is 100-120 DEGC, the humidity is 100-20% RH, humidity gradient is decreased, and the working time is 72 hours; (3) carbonizing the wood, and raising the carbonizing temperature in the carbonization box from 120 DEG C to 190-220 DEG C, wherein 10 DEG C is raised every 2 hours and the carbonization speed is 10 mm / hour; and (4) after the carbonization treatment is finished, adding steam to humidify, so that the ambient temperature in the carbonization box is gradually reduced to 60 DEG C from above 150 DEG C; and when the temperature of the carbonization box is close to the outdoor temperature, taking out thewood. According to the method, the proportion of hot air to water vapor in warm and wet airflow is adjusted to achieve the purpose of thermal modification of the 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 adopted equipment. Background technique [0002] Wood is mainly composed of cellulose and hemicellulose. Cellulose acts as a skeleton in wood cell walls. Its chemical properties and supramolecular structure have an important influence on the strength of wood. The hydroxyl groups and water molecules in cellulose can also form hydrogen bonds. The hydrogen bonds existing between hydroxyl groups in different positions directly affect the moisture absorption and desorption process of wood. A large number of hydrogen bonds can increase the strength of wood, reduce moisture absorption, reduce chemical reactivity, etc., and the moisture absorption of cellulose directly affects the dimensional stability and strength of the limit. After the wood undergoes the carbonization process, the concentration of hydroxyl groups is red...

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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