Rotary drying method for timbers

Abstract

The invention provides a rotary drying method for timbers. The method comprises the following steps of: stacking the timbers and airing the timbers till the water content is about 30 percent; stacking the aired timbers, putting the timbers in a timber drying kiln, preheating, raising the temperature, humidifying, preserving heat and moisture, drying and dehydrating, finally treating and carrying out balanced humidification and rotary treatment many times. The method has the keys that a drying medium in a kiln is kept to form rotary vortex, and the water content of the timbers is not reduced in one step and is kept in rotary decline; by the rotary method, the internal stress of the timbers is dispelled in time, drying stress and surface hardening are eliminated, plasticizing deformation is prevented in the drying stage of the timbers, the defects of air shrinking, bending, deforming, cracking and the like are not caused, the degradation loss of the timbers is reduced to be below 6 percent, the drying period is shortened by about 20 percent, energy can be saved by about 15 percent, and limited timber resources are utilized more effectively; and the method has strong universality, is suitable for various different timbers, and can be widely applied to drying kilns with high automation degree.

Description

technical field [0001] The invention relates to a wood drying process, in particular to a wood rotary 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 make reasonable and effective use of limited wood resources is more important. Wood drying is an important link to ensure and improve wood quality. Through drying treatment, wood deformation and cracking can be prevented, wood degradation and other losses can be reduced, physical properties can be improved, and Improve wood utilization, prevent wood decay and insects, and ensure biological epidemic prevention. At present, most of the waste of wood resources in our country is due to the fact that the...

AI Technical Summary

Problems solved by technology

At present, most of the waste of wood resources in our country is due to the fact that the wet wood has not been dried or handled improperly, which causes the wood to degrade or even lose its use value. Improper drying causes the wood to degrade seriously, generally greater than 20%, of which 5% are completely Lost use value

Therefore, no matter from the point of view of product quality or economic benefits, drying operation is one of the key links in the production of wood products. ) and sawn timber air-drying process regulations (LY / T1069-92), have gradually appeared unable to meet the needs of industry development

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