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A kind of deep carbonization method of wood

A carbonization and wood technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve problems such as deformation and cracking, inability to carbonize wood, expansion, etc., and achieve the effects of easy control, improved production efficiency, and reduced production costs

Active Publication Date: 2017-11-07
江苏跃宇木业科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing wood carbonization technology mainly puts the wood into a large cylinder and then heats it at the bottom. This carbonization process can only carbonize the surface of the wood, but cannot deep carbonize the wood, making the wood use time After a long time, it will expand or deform and crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wood deep carbonization method, comprising the following steps:

[0027] (1) Material selection: select wood and cut it into plates with consistent thickness;

[0028] (2) Vacuum drying: place the obtained plate in a microwave field with an ambient pressure of 65KPa, first control the microwave power to 340W, until the moisture content of the plate drops to 90-95%, turn off the microwave for 45 seconds; then control the microwave power to 850W , until the plate temperature reaches 100-105°C, turn off the microwave and keep for 45 seconds; finally control the microwave power to 240W, until the moisture content of the plate drops to 6-7%;

[0029] (3) High-pressure carbonization: Infuse saturated water vapor to protect the wood. At the same time, adjust the ambient air pressure to 140KPa and keep the microwave power at 700W. Then use a hot press to pre-press the wood. The surface temperature of the hot-press plate is 400°C. Keep it at 1.2MPa for 15min, then increase th...

Embodiment 2

[0032] A wood deep carbonization method, comprising the following steps:

[0033] (1) Material selection: select wood and cut it into plates with consistent thickness;

[0034] (2) Vacuum drying: Place the obtained plate in a microwave field with an ambient pressure of 70KPa, first control the microwave power to 360W, until the moisture content of the plate drops below 95-100%, turn off the microwave for 45 seconds; then control the microwave power to 950W, until the plate temperature reaches 105-110°C, turn off the microwave and keep for 45 seconds; finally control the microwave power to 260W, until the moisture content of the plate drops to 6-7%;

[0035] (3) High-pressure carbonization: Infuse saturated water vapor to protect the wood. At the same time, adjust the ambient air pressure to 150KPa and keep the microwave power at 700W. Then use a hot press to pre-press the wood. The surface temperature of the hot-press plate is 450°C. Keep it at 1.2MPa for 15min, then increase...

Embodiment 3

[0038] A wood deep carbonization method, comprising the following steps:

[0039] (1) Material selection: select wood and cut it into plates with consistent thickness;

[0040] (2) Vacuum drying: place the obtained plate in a microwave field with an ambient pressure of 60KPa, first control the microwave power to 300W, until the moisture content of the plate drops to 90-95%, turn off the microwave for 30 seconds; then control the microwave power to 800W , until the plate temperature reaches 105-110°C, turn off the microwave for 30 seconds; finally control the microwave power to 200W, until the moisture content of the plate drops to 5-6%;

[0041] (3) High-pressure carbonization: Infuse saturated water vapor to protect the wood, adjust the ambient air pressure to 125KPa at the same time, and keep the microwave power at 600W, and then use a hot press to pre-press the wood. The surface temperature of the hot-pressing plate is 350°C. Keep at 1MPa for 20min, then increase the press...

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PUM

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Abstract

The invention relates to a deep charring method of timbers. The method comprises the following steps: selecting timbers; drying the timbers in vacuum, firstly controlling microwave power to be 300-400W, then controlling the microwave power to be 800-1000W and finally controlling the microwave power to be 200-300W in a microwave field with atmospheric pressure of 60-75KPa until the rate of water content in the timbers is reduced to be 5-8 percent; charring the timbers under high pressure, filling saturated water vapor for protecting the timbers, adjusting the ambient atmospheric pressure to be 125-160KPa at the same time, enabling the microwave power to retain at 600-800W, pre-pressing, firstly retaining at 1-1.5MPa for 10-20 minutes, then increasing the pressure of a hot press to 2-3MPa and retaining for 20-30 minutes; turning off the hot press and reducing the pressure, reducing the temperature to 30-50 DEG C to discharge the timbers. The deep charring method of timbers is simple to operate and easy to control; the situation that the timbers are scorched in exterior and tender in interior in the charring process is avoided; the timbers are homogeneously charred; the energy conservation is realized; the production cost is greatly reduced; the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wood processing, and in particular relates to a wood deep carbonization method. Background technique [0002] In recent years, European carbonized wood has entered the Chinese market. Due to its good dimensional stability, corrosion resistance, beautiful color, and environmental friendliness, it has been favored by consumers and has been widely used in outdoor garden landscapes and decorations. Carbonized wood can prolong the service life of wood when used outdoors, save and efficiently utilize wood resources, and play an important role in promoting the development of the wood protection industry. [0003] Wood is composed of hemicellulose, cellulose, lignin and a small amount of extract, and its carbonization principle mainly includes: [0004] (1) The heat resistance of hemicellulose is poor. Under the action of high temperature, it first degrades to generate free acetic acid, and the released acetic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M1/06B27K5/00
CPCB27K5/0055B27M1/06
Inventor 郑园
Owner 江苏跃宇木业科技有限责任公司