Method for drying yate

A wood drying and drying technology, which is applied in the direction of drying solid materials, heating to dry solid materials, drying, etc., can solve the problems of cracking drying stress, wood quality degradation, etc., and achieve good promotion value, good economic and social benefits.

Inactive Publication Date: 2008-11-26
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for drying eucalyptus, so as to solve the problems of wood quality degradation caused by serious shrinkage, cracking and drying stress of eucalyptus.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1), plate preparation: the basic density is lower than 0.55g / cm 3 Fresh or high-humidity low-density fast-growing eucalyptus is processed into various specifications of boards suitable for construction;

[0014] (2) Intermittent drying of wood: put the board into the drying kiln, and use a temperature of 80°C and a humidity of 90 to keep it for 1 hour-a temperature of 15°C and a humidity of 90% to keep it for 4 hours in multiple intermittent cycles. Dry to a moisture content of about 30% to stop the batch process;

[0015] (3), and then use the drying process based on the kiln drying standard of the Baidu test method to dry the wood to the required equilibrium moisture content, which can reduce the shrinkage rate of eucalyptus wood to less than 5%, and other physical and mechanical indicators have reached the national level. standard requirements.

Embodiment 2

[0017] (1), plate preparation: the basic density is lower than 0.55g / cm 3 Fresh or high-humidity low-density fast-growing eucalyptus is processed into various specifications of boards suitable for furniture;

[0018] (2), wood intermittent drying: put the board into the drying kiln, adopt a temperature of 90°C and a humidity of 90% to keep for 4 hours - a temperature of 25°C and a humidity of 95% to keep for 1 hour in multiple intermittent cycles. The wood is dried to a moisture content of about 35% to stop the batch process;

[0019] (3), and then adopt the conventional kiln drying process to dry the wood to the required equilibrium moisture content, which can reduce the shrinkage rate of the eucalyptus wood to less than 10%, and other physical and mechanical indexes all meet the requirements of the national standard.

Embodiment 3

[0021] (1), plate preparation: the basic density is lower than 0.55g / cm 3 The fresh or high-humidity low-density fast-growing eucalyptus is processed into various specifications boards suitable for interior decoration;

[0022] (2) Intermittent drying of wood: put the board into a conventional drying kiln, and use a temperature of 100°C and a humidity of 100% to keep it for 6 hours-a temperature of 30°C and a humidity of 100% for 2 hours. Dry the wood until the moisture content is about 40% to stop the batch process;

[0023] (3) Then, the conventional kiln drying process is used to dry the wood to the required equilibrium moisture content, which can reduce the shrinkage rate of the eucalyptus wood to less than 4%, and other physical and mechanical indexes all meet the requirements of the national standard.

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Abstract

The invention discloses a method for drying gum comprising that 1, preparing plate that processing the low-density fast growing gum whose basic density is lower than 0.55g / cm3 into variable plates, 2, intermission drying the plates that arranging the plate into drying furnace for 1-6h at 80-100Deg. C and 90-100% humidity and for 1-4h at 15-30Deg. C and 90-100% humidity, for several times, until the water content is 30-40%, 3 using general furnace drying process to dry the wood to needed balance water content. The invention can avoid crack and dry stress.

Description

technical field [0001] The invention relates to a method for drying eucalyptus. Background technique [0002] Eucalyptus wood structure is thin and uniform, hard, high strength, beautiful pattern. Eucalyptus trees are fast growing, highly adaptable and have high wood yields. It is recognized as one of the three fast-growing and high-yielding plantation tree species in the world. Its planted area accounts for about 25% of the world's planted forest area. Since the founding of the People's Republic of China, eucalyptus trees have been introduced in southern my country, and the area of ​​planted forests has reached 1.5 million ha 2 . At present, most eucalyptus plantation wood is used to make wood chips as pulpwood, and the general price is only 80 US dollars per dry ton, while the market price of foreign eucalyptus solid wood and its products is 5,000 yuan / m 3 above. In order to increase the added value of eucalyptus wood and obtain higher economic benefits, many wood pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B3/00B27K5/00
Inventor 吴义强彭万喜
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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