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A kind of wood drying method

A technology for wood drying and lumber, applied in the direction of drying solid materials, method combination to dry solid materials, drying, etc., can solve the problems of difficult drying of hard and miscellaneous small-diameter logs, long drying cycle of small-diameter logs, affecting product dimensional stability, etc. Achieve the effect of good uniformity of wood moisture content, improve comprehensive utilization rate, and avoid shrinkage and cracking

Active Publication Date: 2018-07-31
阜南县大喜柳编工艺品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wide application of small diameter wood is severely limited due to the lack of effective drying methods for small diameter wood.
The known drying treatment methods for small-diameter logs are mostly carried out through conventional drying equipment and processes. The main problem is that not only the drying cycle of small-diameter logs is long, but also the drying defects are serious, such as serious deformation and diameter are easy to occur during the drying process. cracking, especially for hard miscellaneous small-diameter logs, it is difficult to dry and the yield is low. The drying quality of small-diameter logs directly affects the dimensional stability of products processed from small-diameter logs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Fast-growing poplar is suitable for cultivation throughout the country, especially in Northwest, North and Northeast China. The fast-growing poplar of diameter 20cm comprises the following steps in drying chamber drying method:

[0022] 1) Stacking: Saw the wood into planks or squares, select the same size and specifications for stacking, and place them in the wood drying room;

[0023] 2), preheating: heating the ambient temperature in the wood drying chamber to 45-55°C at a heating rate of 4-5°C per hour, and adjusting the ambient humidity to 18-20% for 20-40h;

[0024] 3) Vacuum: vacuumize, control the absolute pressure at 0.1-0.01Mpa, the temperature is greater than or equal to 85°C, and the time is 0.5h-1h;

[0025] 4) Drying: Stepwise heating of the pile in the range of 85-150°C at a heating rate of 3-4°C per hour;

[0026] 5), final treatment: monitor when the moisture content of the dried wood drops to 10%, stop drying, return to normal pressure, adjust the am...

Embodiment 2

[0030] Eucalyptus, the origin of which is mainly in the Australian continent, was introduced to all parts of the world in the 19th century. It has been cultivated in nearly a hundred countries or regions. The drying method of eucalyptus with a diameter of 20cm in the drying room includes the following steps:

[0031] 1) Stacking: Saw the wood into planks or squares, select the same size and specifications for stacking, and place them in the wood drying room;

[0032] 2), preheating: heating the ambient temperature in the wood drying chamber to 45-55°C at a heating rate of 4-5°C per hour, and adjusting the ambient humidity to 18-20% for 20-40h;

[0033] 3) Vacuum: vacuumize, control the absolute pressure at 0.1-0.01Mpa, the temperature is greater than or equal to 85°C, and the time is 0.5h-1h;

[0034] 4) Drying: Stepwise heating of the pile in the range of 85-150°C at a heating rate of 3-4°C per hour;

[0035] 5), final treatment: monitor when the moisture content of the drie...

Embodiment 3

[0039] White birch is a widely distributed tree species in eastern Asia. It is planted in Northeast China, Henan, Shaanxi, Ningxia, Gansu, Qinghai, Sichuan, Yunnan, southeastern Tibet and other places. The drying method of white birch with a diameter of 15cm in a drying room Include the following steps:

[0040] 1) Stacking: Saw the wood into planks or squares, select the same size and specifications for stacking, and place them in the wood drying room;

[0041] 2), preheating: heating the ambient temperature in the wood drying chamber to 45-55°C at a heating rate of 4-5°C per hour, and adjusting the ambient humidity to 18-20% for 15-30h;

[0042] 3) Vacuum: vacuumize, control the absolute pressure at 0.1-0.01Mpa, the temperature is greater than or equal to 85°C, and the time is 0.5h-1h;

[0043] 4) Drying: Stepwise heating of the pile in the range of 85-150°C at a heating rate of 3-4°C per hour;

[0044] 5), final treatment: monitor when the moisture content of the dried wo...

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Abstract

The invention discloses a wood drying method, which relates to the technical field of wood processing technology. The method comprises the following steps: stacking, preheating, vacuuming, drying, finishing treatment, cooling treatment and cooling. By adopting the drying method of the present invention, the moisture content of the board is controlled at 8-11%, the moisture content of the wood is uniform, and the drying cycle of the wood is shortened. The quality of the dried wood is good, there are few defects, and the loss rate is low. utilization rate. The invention is suitable for the production of wood products such as furniture, and reduces the probability of quality problems such as deformation and cracking during the production process, so as to improve the product quality of wood furniture.

Description

technical field [0001] The invention relates to the technical field of wood processing technology, in particular to a wood drying method. Background technique [0002] With the progress of society, people advocate nature, and the mood of returning to nature is becoming more and more urgent, which makes wooden products popular in the market; on the other hand, the world today is facing environmental protection and ecological problems brought about by the decreasing forest resources. Therefore, how to rationally and effectively utilize the limited timber resources is more important. According to the current resource situation in our country, for a long period of time in the future, the raw materials for the development of my country's forest industry products will be mainly fast-growing small-diameter timber with a short rotation period of 5 to 10 years. After reasonable drying and processing, the small-diameter wood can be directly made into supporting furniture such as chai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B7/00
Inventor 童大喜童小慢朱华云
Owner 阜南县大喜柳编工艺品有限公司
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