Continuous wood modification heat treatment process and system

Abstract

The invention provides a continuous wood modification heat treatment process. The process comprises the following steps: stacking initial wood blanks on a trolley at intervals, applying pressure to the tops of the initial wood blanks to enable all the positions of the initial wood blanks to be stressed evenly and kept flat, and sequentially performing the following treatment steps of preheating treatment, heating treatment, drying treatment, carbonization treatment, slow cooling treatment, rapid cooling treatment and rewetting treatment. Each treatment step comprises a plurality of kilns, thekilns in the steps S2-S4 are arranged in an equal-gradient heating mode, and the kilns in the steps S5-S7 are arranged in an equal-gradient cooling mode. The invention provides a continuous wood modification heat treatment system. The continuous wood heat treatment system comprises a plurality of kilns, a trolley, a transmission device for driving the trolley to move, and a microwave and other heat source heating device. The process and the system provided by the invention provide high-quality wood which is low in energy consumption, short in production period, uniform and consistent in carbonization degree of the interior and the surface, high in strength and stable in performance, and the system is low in production cost and suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to a continuous wood modification heat treatment process and system. Background technique [0002] Wooden materials are derived from nature, and are loved by people because of their natural texture and beautiful color. Due to the biological properties and various characteristics of wood, wood is prone to shrinkage and swelling when the external humidity and heat conditions change, and it is a material with unstable dimensions. This property has an adverse effect on the utilization of wood. The wood cut from trees has a high internal moisture content. If it is directly processed into a board, it is easy to cause the water inside the board to evaporate after the board is heated in the subsequent use process, resulting in depression or cracking of the board. , or the board directly made of fresh wood will cause the cell wall in the board to absorb water and expand after encoun...

AI Technical Summary

Problems solved by technology

The wood cut from trees has a high internal moisture content. If it is directly processed into a board, it is easy to cause the water inside the board to evaporate after the board is heated in the subsequent use process, resulting in depression or cracking of the board. , or the board directly made of fresh wood will cause the cell wall in the board to absorb water and expand after encountering water, which will cause the board to protrude or expand, whether it is concave or convex, it will cause the board to be uneven. Affect the normal use of the board, so in order to overcome this problem, the wood is generally heat-treated or carbonized after the wood is felled from the tree

[0003] However, the current wood heat treatment technology is mainly by putting the wood into a large hot kiln, which is an intermittent operation. During such a heat treatment process, the wood is heated unevenly, and the degree of carbonization is inconsistent, which is prone to local coking, drumming, deformation, and cracking. Wait

In addition, the current thermal kiln treatment adopts the method of gradually increasing temperature, which leads to high energy consumption of heat treatment and long production cycle, which can easily lead to the loss of wood bending strength caused by wood-free heat treatment process, making the subsequent use of wood unable to meet the requirements

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