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Processing method for balancing moisture in wood

A microwave treatment and wood technology, applied in the direction of heating to dry solid materials, drying solid materials, furnaces, etc., can solve the problems of low efficiency, large capital occupation, material occupation, etc., and achieve high operating efficiency, balanced water distribution, and reduction Effect of Small Drying Stress

Inactive Publication Date: 2009-03-18
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method not only occupies a large amount of space and storage capacity, but also occupies a large amount of funds, and the efficiency is very low.

Method used

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  • Processing method for balancing moisture in wood

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example 1

[0015] Take ash floor blanks with a thickness of 18mm, a width of 135mm, and a length of 1000mm. The moisture content is about 8%, and the moisture content gradient (moisture content of the central layer minus the moisture content of the surface layer) is 3.0%. The untreated wood board 2 is sent from the feed platform 1 to the moisture content detection device 4 before microwave treatment through the feed conveyor belt 3, and the output power of the microwave generator 5 is determined according to the detected moisture content, and the microwave energy is transported to the Wooden boards are processed at 7 places in the microwave radiation chamber, the radiation time is controlled at 15 seconds by the speed of the conveyor belt, and the radiation power is 0.5w / cm 3 , so that the internal temperature of the wood is controlled at 95°C. After the wood boards are treated with microwaves and tested by the moisture content detection device 8, the wood boards 10 with qualified moistur...

example 2

[0018] Take a poplar wooden door core board with a thickness of 50mm, a width of 105mm, and a length of 2000mm. After air-drying, the moisture content is 15%, and the moisture content gradient is 5%. The untreated wood board 2 is sent from the feed platform 1 to the moisture content detection device 4 before microwave treatment through the feed conveyor belt 3, and the output power of the microwave generator 5 is determined according to the detected moisture content, and the microwave energy is transported to the Wooden boards are processed at 7 places in the microwave radiation chamber, the radiation time is controlled at 3 seconds by the speed of the conveyor belt, and the radiation power is 5.0w / cm 3 , so that the internal temperature of the wood is controlled at 120°C, and after the microwave treatment, the wood board is tested by the moisture content detection device 8 after microwave treatment, and the wood board 10 with qualified moisture content is sorted by the transfe...

example 3

[0021] Take a eucalyptus frame material with a thickness of 50mm, a width of 75mm, and a length of 2000mm. After drying, the moisture content is 12%, and the moisture content gradient is 4.5%. The untreated wood board 2 is sent from the feed platform 1 to the moisture content detection device 4 before microwave treatment through the feed conveyor belt 3, and the output power of the microwave generator 5 is determined according to the detected moisture content, and the microwave energy is transported to the Wooden boards are processed in microwave radiation cavity 7, the radiation time is controlled at 30 seconds by the speed of the conveyor belt, and the radiation power is 2.0w / cm 3 , so that the internal temperature of the wood is controlled at 105° C., and after the microwave treatment, the wood board is tested by the moisture content detection device 8 after microwave treatment, and the wood board 10 with qualified moisture content is sorted by the transfer device 9 and sent...

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Abstract

The invention provides a method for balancing moisture in wood by microwave, which belongs to the field of wood processing. Currently, in order to solve the problem of uneven water ratio, the prior mode is to put wood which is generally dried in a health preserving room, control temperature and humidity in space, and process the product after at least 10 days of temperature and humility control to ensure the evenness of the water ratio inside the wood. Thicker wood requires more time, even requires about a month. With the prior treatment mode, the materials not only occupy mass fields and storage capacity, but also use great capital, and have low efficiency. The method comprises the following steps: a sawed timber or a wood part which is subjected to the prior drying or air drying with water ratio of between 8 and 15 percent is treated by microwave for 3 to 30 seconds with power density of microwave radiation of between 0.5 and 5 watt / centimeter<3>, the gradient and the stress of water ratio of treated wood are obviously reduced. The method has the advantages of simple process, good treatment effect, capability of continuous treatment and the like.

Description

technical field [0001] The invention relates to a wood moisture balance treatment method, in particular to a wood moisture balance treatment method using microwaves. Background technique [0002] At present, the output value of China's furniture and flooring industry is the largest in the world. The furniture and flooring industry mainly uses solid wood as raw materials. These woods must be dried to achieve high strength and good dimensional stability, which is conducive to the use of products. The main methods of wood drying are conventional steam heating drying and air drying. However, due to the large difference in moisture content between different boards before wood drying, the drying characteristics of the wood itself are also different, and the unevenness of the drying equipment makes the wood dry after drying. The quality of the boards varies greatly, mainly in the differences in moisture content and drying stress. The outstanding feature of conventional drying is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/347
Inventor 周永东傅峰李贤军陈志林姜笑梅刘君良卢克阳林兰英
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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