Method for drying small-diameter cylindrical raw wood

Abstract

The invention discloses a method for drying a small-diameter cylindrical raw wood, which particularly comprises the following operation steps: the tested raw wood is a cylindrical wood block that is 80 cm in length and about 20 cm in diameter, the tested raw wood is not peeled, a notch is formed from a heart-centre to a bark, the width of the notch is smaller than or equal to 3 mm generally, two end heads of the cylindrical wood block are sealed by glass cement, the sealed cylindrical wood block is placed into a drying kiln for drying process, the final moisture content of man-made forest cryptomeria japonica and China fir small-diameter cylindrical raw wood after the drying is 10 to 15%, the process temperature is higher by 5 to 7 DEG C than the final drying temperature generally, and the relative humidity is balanced with the moisture content higher by 2 to 4 % than the final moisture content, so that the internal temperature of the wood is increased, and the drying speed is increased.

Description

technical field [0001] The invention relates to a method capable of effectively improving the drying quality of small-diameter logs on a small scale in the laboratory stage. Background technique [0002] Timber is an important material indispensable to people's lives. With the development of my country's economic construction and the improvement of people's living standards, higher requirements have been put forward for wood and its products from quantity to quality. However, my country is a country with poor forest resources, and the total amount of forest resources does not meet the requirements of national economic and social development. Vigorously developing plantation forests is a strategic measure adopted by all countries in the world after the reduction of natural forests. In this strategic measure, plantation forests have achieved remarkable results in fast growth and high yield, but plantation forests grow fast, have short rotation periods, small tree diameters, T...

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Problems solved by technology

Vigorously developing plantation forests is a strategic measure adopted by all countries in the world after the reduction of natural forests. In this strategic measure, plantation forests have achieved remarkable results in fast growth and high yield, but plantation forests grow fast, have short rotation periods, small tree diameters, The proportion of young and middle-aged wood is large, and the material is generally loose. It is prone to bending and cracking during the drying process, and the drying quality is poor, resulting in a low yield rate, which seriously affects the processing and utilization of artificial fast-growing and high-yielding forests and small-diameter wood.

[0003] In the past, the drying of small-diameter timber at home and abroad was mainly carried out in the form of sawn timber or raw strips. Most of the materials used were birch, poplar, and black locust. Not yet reported

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