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Ultrahigh temperature heat treatment method of wood

A technology for thermal treatment of wood, applied in the field of wood treatment, can solve the problems of waste oil purification and waste treatment, pollution of wood surface, high treatment cost, and achieve excellent comprehensive performance, small strength drop, good corrosion resistance and weather resistance. Effect

Active Publication Date: 2007-08-01
王益新 +1
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has obvious disadvantages, that is, the treatment cost is high, the wood surface will be polluted, and there are problems in the purification and disposal of waste oil.

Method used

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Examples

Experimental program
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Embodiment Construction

[0027] An exemplary embodiment of the ultra-high temperature heat treatment method for wood according to the present invention is given below.

[0028] The exemplary heat treatment process includes five stages: a preheat stage, a drying stage, a ramp up stage, a soak heat treatment stage, and a cooling stage.

[0029] First, the wood is put into a wood heat treatment equipment, which may include a wood treatment chamber, a heating device, a fan, a heating valve, a circulation valve, a pressure and temperature monitoring device, and the like. Then perform the following process steps in sequence:

[0030] 1. Preheating stage

[0031] During the preheating stage, the wood is preheated. The temperature of the preheating stage can be raised to about 100°C to 150°C, for example. In the heating process of the preheating stage, the wood may be sprayed with water if necessary.

[0032] 2. Drying stage

[0033] After the temperature is raised to a certain temperature in the preheat...

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Abstract

The invention provides a wood ultra-high temperature heat treatment method for improving wood dimensional stability and durability. The heating-up process of the treatment method includes: the first heating-up stage, using only water vapor as isolating oxygen protect media; the subsequent second heating-up stage, introducing nitrogen and using the mixture gas of nitrogen and water vapor as isolating oxygen protect media to reject degradation of wood main component cellulose then prevent the decline of wood strength. The products treated by the invention have good dimensional stability and durability, while strength decline is small; Moreover, the needed processing time of the treatment method is short, production efficiency is high and cost is low.

Description

technical field [0001] The present invention relates to a method of wood treatment, in particular to a treatment method of ultra-high temperature heat treatment of wood to improve its dimensional stability and durability. Background technique [0002] Wood is widely used in various purposes such as building structures, decorative materials, and furniture. People have been working on treatments to make wood dimensionally stable, resistant to decay and weathering. In particular, due to the increasing scarcity of natural wood resources, the main source of wood has turned to plantations. Plantation forests have a short rotation period, a large proportion of young wood, high hemicellulose and lignin content, poor quality, low density, and poor dimensional stability and durability. performance. [0003] Various methods have been tried to process wood. People use surface finishes or veneers or grill wood, but such treatments only protect or carbonize the surface layer, and do n...

Claims

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Application Information

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IPC IPC(8): B27K5/00
Inventor 方远进
Owner 王益新
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