Wood drying method

Abstract

The invention relates to a wood drying method, which is a method for controlling a wood drying process by wood stress. In a drying process, the bending degree of a stress test piece represents a stress value to control the temperature and the moisture of a drying kiln so as to control a wood drying process. Wood of a certain length is sawn on dried material; the sawn wood is equally divided into two parts on the half of the thickness direction along the fiber direction, i.e. a first stress test piece and a second stress test piece; except the wood surface, the two stress test pieces seal rest five surfaces to isolate the five surfaces from air; then, the five sealing surfaces of the second stress test piece are fastened by a fixing sleeve; the two stress test pieces are put on the position with the highest drying speed in the drying kiln along with the dried material; the stress of the dried material is judged according to the bending degree of the two stress test piece; and the bending degrees of the stress test piece is observed to control the temperature and the moisture of a drying medium and the drying kiln so as to guarantee the drying quality of the wood and prolong the service life of the dried material. The method is especially suitable for drying tree types which are difficult to dry.

Description

technical field [0001] The invention relates to a wood drying method, in particular to a drying method for controlling the wood drying process through wood stress. Background technique [0002] Wood drying process control refers to adjusting the temperature and humidity of the drying medium and controlling the drying speed of wood on the premise of ensuring the quality of wood drying. The drying standard is a program table used to control the drying process. The commonly used drying standard is the moisture content standard, that is, the temperature and humidity of the drying medium in different drying stages are specified according to the moisture content of the material to be dried in the drying kiln. The direct cause of affecting the drying quality of wood is the stress generated during the drying process of wood. Therefore, the wood drying process controlled by the moisture content benchmark cannot directly reflect the stress of the dried wood during the drying process,...

AI Technical Summary

Problems solved by technology

Therefore, the wood drying process controlled by the moisture content benchmark cannot directly reflect the stress of the dried wood during the drying process, so the drying quality problem is prone to occur in the control of the drying process

At present, the commonly used method for testing the drying stress of wood is mainly the comb method. The test value of this method only reflects the drying stress index of wood, and cannot be detected online in real time, and the test value must lag behind the drying situation at that time. Timeliness Relatively poor; In the past 20 years, with the advancement of science and technology, some new testing methods for wood drying stress have emerged. Acoustic emission method is used to test wood drying stress. Lattice contact sensor for wood stress detection

However, these technologies are immature for various reasons and have their own limitations.

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