High-temperature thermal treatment timber production method

Abstract

The invention discloses a high-temperature thermal treatment timber production method, which comprises the following timber treatment steps of: A, heating the timber to the temperature of between 120 and 140 DEG C in a high-temperature high-pressure reaction kettle, and gasifying moisture and esterification product polysaccharide of the timber till the moisture content of the timber is 5 to 6 percent; B, raising the reaction kettle to the temperature of between 200 and 250 DEG C, and pressing the timber, wherein the absolute pressure in the reaction kettle is 1.0 to 2.0MPa; C, adding nitride into the reaction kettle, generating nitrogen in the reaction kettle by oxide, reacting nitrogen and the timber to generate a coked nitrogen-containing body, and keeping the thermal treatment carbonization temperature for 2 to 8 hours; D, closing a heat source, cooling the reaction kettle to the temperature of between 100 and 130 DEG C, and intermittently jetting water vapor to the timber so that the timber forms a fiber material; and E, blowing air by an air blower at an air speed of 10 to 15m / s to cool and dry the timber, changing the air direction once every 1 to 3 hours, and forming carbonized timber after the timber is cooled to normal temperature.

Description

technical field [0001] The invention relates to a production method of high-temperature heat-treated wood, in particular to a production method capable of making carbonized wood with good performances such as fire resistance, chemical resistance and durability. Background technique [0002] During the use of wood, due to changes in the environment, it is easy to warp, deform, rot, and mold. Over the years, many researchers have devoted themselves to improving the dimensional stability, decay resistance and mildew resistance of wood. However, methods such as resin impregnation treatment, acid and alcohol impregnation treatment, polyethylene glycol impregnation treatment, formaldehyde treatment, adding water repellent and other chemical agents are often used. Chemical treatment has a greater adverse impact on the environment; paint treatment methods are non-permanent Yes, once the surface of the board is damaged, the waterproof effect will decrease; metallization and ceramic ...

AI Technical Summary

Problems solved by technology

[0003] In the current production process of carbonized wood, most of them use traditional wood drying kilns and ultra-high temperature heat treatment equipment. In the process of high-temperature heat treatment, coal is used as fuel in traditional wood drying kilns. When coal is burned, it will emit CO2, which will pollute the environment and is not conducive to environmental protection. Water vapor is usually used as the protective gas, which will increase the production cost of carbonized wood, and at the same time, there is a heat utilization rate. Defects of low cost, long processing cycle, high production cost, and difficulty in popularization