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Active wood drying method

A drying method and wood drying technology, applied in the direction of wood drying, drying gas arrangement, local stirring and drying machine, etc., can solve the problems affecting the utilization of fast-growing wood and solid wood.

Active Publication Date: 2017-06-20
杭州临安宇凯木制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above technical scheme, in order to ensure the drying quality of poplar boards, long-term pre-drying treatment is carried out in the early stage, which often takes 1 to 2 months, which affects the solid wood utilization of fast-growing wood

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: The tree species selected in this embodiment is fast-growing poplar, and the initial moisture content is 92%. The saw is made into a thickness of 30mm, a length of 2000mm, and a width of 200mm. Follow the steps below to dry fast-growing poplar.

[0030] (1) Stacking and kiln loading, separate and stack the wood with a spacer with a thickness of 25mm. The pile of timber is 2000mm long, 1000mm wide, and 1000mm high. .

[0031] (2) When the moisture content of poplar sawn timber is greater than 40%, place a dehumidifier between the piles, and use the dehumidifier to circulate dehumidification to discharge the moisture evaporated from the wood in the drying kiln. The temperature of the drying medium is 40°C and the relative humidity is 70%. , the air circulation velocity is 5 m / s.

[0032] (3) When the moisture content of the poplar sawn timber is dried to 40%, the internal circulation dehumidification and drying are stopped, and the moisture evaporated fro...

Embodiment 2

[0038] Embodiment 2: The tree species selected in this embodiment is fast-growing eucalyptus, with an initial moisture content of 86%. The saw is made into a thickness of 45mm, a length of 2000mm, and a width of 150mm.

[0039] (1) Stacking and kiln loading, separate and stack the wood with a spacer with a thickness of 25mm. The pile of timber is 2000mm long, 1000mm wide, and 1000mm high. .

[0040] (2) When the moisture content of eucalyptus sawn timber is greater than 40%, a dehumidifier is placed between the wood pile and the wall of the drying kiln, and the moisture evaporated from the wood in the drying kiln is discharged by circulating dehumidification in the dehumidifier. The temperature of the drying medium is 35°C , The relative humidity is 85%, and the air circulation speed is 3 m / s.

[0041] (3) When the moisture content of eucalyptus sawn timber is dried to 40%, stop the internal circulation dehumidification and drying, and use the drying kiln dehumidification wi...

Embodiment 3

[0047] Embodiment 3: The tree species selected in this embodiment is fast-growing eucalyptus, with an initial moisture content of 90%. The saw is made into a thickness of 30mm, a length of 2000mm, and a width of 150mm.

[0048] (1) Stacking and kiln loading, separate and stack the wood with a spacer with a thickness of 25mm. The pile of timber is 2000mm long, 1000mm wide, and 1000mm high. .

[0049] (2) When the moisture content of the eucalyptus sawn timber is greater than 40%, a dehumidifier is placed between the wood pile and the wall of the drying kiln, and the moisture evaporated from the wood in the drying kiln is discharged by circulating dehumidification in the dehumidifier. The temperature of the drying medium is 38°C , The relative humidity is 80%, and the air circulation speed is 4 m / s.

[0050] (3) When the moisture content of eucalyptus sawn timber is dried to 40%, stop the internal circulation dehumidification and drying, and use the drying kiln dehumidificatio...

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Abstract

The application discloses an active wood drying method. The dehumidification method includes an internal circulation dehumidification method. A dehumidification point is arranged along an airflow internal circulation path. Wet media are received on the above dehumidification point, and dry media are discharged. The shrinking, crack and deformation of the dried wood are reduced obviously, and the wood maintains the original color. The active wood drying method is especially applied to drying of poplar wood, eucalyptus wood and impregnating modified wood. The active wood drying method has the advantages of high drying efficiency, low energy consumption and high drying quality. The technical problems that the eucalyptus wood and the poplar wood are easy to shrink, deform or crack in drying are solved.

Description

technical field [0001] The present application relates to the technical field of wood drying, in particular to a moisture removal method for active wood drying, especially when it is suitable for drying fast-growing wood and light wood, it can improve drying efficiency and avoid drying defects. Background technique [0002] Wood is the only renewable material among the four basic raw materials. It has the characteristics of fast regeneration, natural, environmental protection and excellent performance. Wood runs through all aspects of human life with its irreplaceable functions. The drying treatment of wood is almost the longest and most energy-consuming process in the wood processing and manufacturing process, especially the existing drying process mostly uses high temperature and high humidity drying methods. For example, Chinese patent CN 103017485A discloses a high-temperature, high-humidity rapid drying process for wood, which includes: a step of humidifying and heating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B9/06F26B21/02F26B21/04F26B21/08
CPCF26B9/06F26B21/02F26B21/04F26B21/08F26B2210/16
Inventor 涂登云卢俊彭冲梁锐维
Owner 杭州临安宇凯木制品有限公司
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