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Method for processing wood and wood manufactured by same

A treatment method and technology of wood, applied in wood treatment, details of wood treatment, humidity control of wood, etc., can solve the problems of undiscovered research literature and patent applications, easy cracking and shrinkage of wood, and difficulties in product quality control, etc., to achieve Low cost wood treatment, maintains color and appearance, achieves degreasing effects

Inactive Publication Date: 2011-06-01
WUXI YUSHENG KITCHEN & BATH APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventive method is also under normal pressure, and there are also defects such as low equilibrium moisture content in the carbonization process, and the wood is prone to cracking and shrinkage; in the heat treatment carbonization process, intermittent steaming treatment is used to adjust the humidity, which is random , it is difficult to control the quality of the product, and the quality of the prepared wood is difficult to control
[0007] No research literature and patent applications have been found on the high-temperature treatment of wood by increasing environmental pressure

Method used

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  • Method for processing wood and wood manufactured by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Palletizing

[0029] Larix boards with an initial moisture content of 50%, a thickness of 40mm, a length of 2000mm, and a width of 100mm are stacked according to the wood drying method and placed in a closed pressure-resistant high-temperature heat treatment equipment;

[0030] 2. Decompression and vacuuming

[0031] Under 25 ℃, the larch wood inside the pressure-resistant high-temperature heat treatment equipment is subjected to decompression and vacuum treatment, so that the absolute pressure inside the equipment reaches and maintains 0.01MPa (that is, the relative vacuum degree is -0.09MPa). After keeping at 0.01MPa for 25 minutes, turn off the vacuum pump and stop vacuuming;

[0032] 3. Preheating treatment

[0033] Feed saturated water vapor into the pressure-resistant high-temperature heat treatment equipment. When the absolute pressure in the equipment reaches 0.1MPa, stop feeding saturated water vapor, and then turn on the heating system to preheat the wood...

Embodiment 2

[0044] Except that the absolute pressure inside the equipment during decompression and vacuum treatment is 0.02MPa, the decompression and vacuum treatment time is 60 minutes; the temperature inside the equipment during preheating treatment is 95°C, preheating to the temperature of the wood surface and the center of the wood The temperature difference is ≤4°C; the absolute pressure inside the equipment is 0.4MPa during the high-temperature pressurized drying process, the pressurized drying temperature is 130°C, and the heating and heating rate is 10°C / h; the absolute pressure inside the equipment during the high-temperature pressurized heat treatment process is The pressure is 0.5MPa, the heat treatment temperature is 200°C, the heating rate is 20°C / h, and the heat treatment time is 4 hours; during the humidity control process, saturated water vapor with an absolute pressure of 0.1MPa is introduced to make the temperature of the wood in the equipment After lowering to 100°C, tur...

Embodiment 3

[0047] Except that the absolute pressure inside the equipment is 0.4MPa during the high-temperature pressurized heat treatment process, the heat treatment temperature is 180°C, the heating and heating rate is 10°C / h, and the heat treatment time is 4 hours; After saturating the water vapor to reduce the temperature of the wood in the equipment to 100°C, turn on the condensation system to cool the wood in the equipment so that the temperature of the wood inside the equipment is 75-85°C until the moisture content of the wood reaches 9%. Except, the others are the same as in Example 1.

[0048] Determination of the density of modified wood according to the national standard GB1933-91 "Determination of Timber Density Method", GB1935-91 "Test Method for Compressive Strength of Wood along the Grain" to determine the compressive strength of modified wood, GB1936-91 "Test Method for Bending Strength of Wood" "Determination of the flexural strength of modified wood, GB1937-91 "Test meth...

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Abstract

The invention relates to a method for processing wood, which belongs to the technical field of heat treatment of wood. The method comprises the steps of sequentially carrying out decompressing, preheating, high-temperature pressurizing and humidifying on wood placed into a container. Because the higher equilibrium water content is maintained in the process of processing the wood by the method, the manufactured wood overcomes the dry defects of cracking, shrinkage, and the like. The manufactured wood has reinforced size stability, strength and bending strength; the cracking generation proportion, the hygroscopicity and the water absorption performance of the wood are greatly reduced; and the weather and corrosion resistance of the wood is improved. The wood manufactured by the method reaches the standard of carbonized wood SB / T 10508-2008. The superheated steam with large specific heat and heat transfer coefficient is used as a heat transfer medium by the method and has small medium transfer resistance, short processing time and less heat loss; and the method saves energy sources and has low wood processing cost.

Description

technical field [0001] The invention relates to a wood treatment method and wood prepared by the method, in particular to a treatment method for controlling the temperature and pressure of water vapor in the space around the wood and the wood treated by the method, belonging to the technical field of wood heat treatment. Background technique [0002] Existing studies have shown that wood after high-temperature heat treatment (heat treatment temperature not lower than 180°C) has a series of outstanding advantages such as good biological durability, weather resistance, dimensional stability, safety, and environmental protection, and is increasingly widely used It is used in many aspects such as outdoor decoration, wooden escalators, park facilities, and internal facilities of steam rooms. [0003] At present, the known high-temperature treatment methods for wood are generally carried out under normal pressure (0.1 MPa). However, when wood is subjected to high-temperature heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K5/00B27K1/00
Inventor 伊松林刘新有贾东宇
Owner WUXI YUSHENG KITCHEN & BATH APPLIANCE
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