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Wood heat treatment method

A technology of wood heat treatment and stage heat treatment, which is applied in the direction of wood heat treatment, wood treatment, wood treatment details, etc. It can solve the problems of low heat treatment temperature, fast heat treatment speed and high treatment temperature.

Active Publication Date: 2018-11-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a wood heat treatment method in view of technical defects such as high processing temperature, defects in heat-treated wood, and low quality of heat-treated wood in the existing wood heat treatment process. Fast, heat-treated wood has fewer defects, and the wood treated at a lower temperature can reach the characteristics of existing high-temperature heat-treated wood, which not only saves energy consumption, but also improves the efficiency of wood heat treatment, and heat-treated wood can be used for indoor furniture and floors. also for wooden structures

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0182] 1. Material handling

[0183] 1A. Material stacking

[0184] The Chinese fir plank sawn into 4500mm * 400mm * 30mm (length * width * thickness) is stacked according to any one of the timber stacking forms disclosed in the field of wood drying. There is a layer of spacers with a thickness of 30mm and a width of 25mm between adjacent fir boards on both sides, and the distance between two adjacent spacers in the same layer of spacers is 500mm, and the spacer is two The distance between two end faces is 50mm;

[0185] In the embodiment of the invention, the spacer with a thickness of 30 mm and a width of 25 mm is used as an example for illustration. Spacers with other dimensions of 30 ± 5 mm in thickness and 25 ± 5 mm in width are also suitable for the present invention.

[0186] 1B. Fixed material stack

[0187] The Chinese fir pile is placed inside the frame of the material loading system, the fixing assembly 62 is pressed down, the four sides of the mesh top cover are...

Embodiment 2

[0206] Except step 2A-2) where the ultrasonic power is 0.1W / cm 2 Frequency is 56kHz; Ultrasonic pretreatment time 180min, according to wood thickness meter, timber ultrasonic pretreatment time is 60min / cm (thick); Step 2B-1) in the modified treatment liquid is the zinc chloride that mass concentration is 15%; In step 2B-2), the absolute pressure in the treatment chamber is maintained at 0.01 MPa; the ultrasonic power is 0.1 W / cm 2 Frequency is 56kHz; 1.5h between the ultrasonic modification treatment under the vacuum state, by wood thickness meter, the ultrasonic modification treatment time under the vacuum state of the wood is 0.5h / cm (thick); repeat step 2B in step 2B-4) -2), 2B-3) were treated 3 times; the ultrasonic modification treatment time under each vacuum state was 1.5h, the ultrasonic treatment time was 1.5h, and the ultrasonic modification treatment time of wood was 0.5h per centimeter of wood thickness / cm (thick); the total time of ultrasonic modification treatm...

Embodiment 3

[0210] Except step 2A-2) the ultrasonic power is 20W / cm 2 Frequency is 25kHz; Ultrasonic pretreatment time 15min, according to wood thickness meter, wood ultrasonic pretreatment time is 5min / cm (thick); In step 2B-1), the modified treatment solution is zinc chloride whose mass concentration is 1%; In step 2B-2), the absolute pressure in the treatment chamber is maintained at 0.005MPa; the ultrasonic power is 20 W / cm 2 Frequency is 25kHz; Ultrasonic modification treatment time 9h under the vacuum state, by wood thickness meter, the ultrasonic modification treatment time under the vacuum state of wood is 3h / cm (thick); Repeat step 2B-2 in step 2B-4) ), 2B-3) for 2 times; the ultrasonic modification treatment time under each vacuum state is 9h, the ultrasonic treatment time is 9h, and the wood ultrasonic modification treatment time is 3h / cm (thickness) according to the thickness of each centimeter of wood ; The total time of ultrasonic modification treatment under the vacuum sta...

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Abstract

The invention provides a wood heat treatment method. The wood heat treatment method comprises the steps of sequentially carrying out ultrasonic pretreatment, ultrasonic modified treatment under the pressure reduction state and heat treatment on wood. Through the adoption of the method, the existing high-temperature treatment wood can be obtained at low heat treatment temperature; the wood treatedthrough the method achieves the size stability of the high-temperature heat treatment wood, the heat treatment efficiency and speed are increased, and energy consumption is reduced; and the prepared heat treatment wood has few defects, is high in mechanical performance and can be used for indoor furniture and floors and used for wood structures.

Description

Technical field: [0001] The invention relates to a wood heat treatment device and method, in particular to a treatment equipment and a treatment method for increasing the wood heat treatment rate, and belongs to the field of wood heat treatment. Background technique [0002] Wood is a renewable, environmentally friendly and recyclable material with excellent natural properties. However, because of its special biological structure, it must undergo certain processing before it can be used. High-temperature heat treatment of wood technology does not add any chemicals, which can improve and improve the quality of fast-growing plantation wood, and replace some high-quality natural forest wood. [0003] In order to improve the weather resistance, dimensional stability and decay resistance of wood. Patent 201310604960.4 provides a high-temperature heat treatment process for fast-growing plantation eucalyptus wood. This invention pre-treats fast-growing plantation eucalyptus; boils...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00B27K1/00B27K3/08
CPCB27K1/00B27K3/08B27K5/001B27K5/0065B27K5/0085
Inventor 何正斌伊松林曲丽洁王振宇钱京
Owner BEIJING FORESTRY UNIVERSITY
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