Method and system for drying wood

Abstract

The invention discloses a system for drying wood, which comprises a drying kiln, a humidity generator, a heat energy recoverer, a filter and a control system, wherein the drying kiln is provided with a gas inlet and a gas outlet; high-temperature waste gas discharged out of the gas outlet of the drying kiln is filtered by the filter, then is input to the heat energy recoverer, and is discharged out after performing heat exchange with low temperature gas from the humidity generator in the heat energy recoverer, and the heated low temperature gas output by the heat energy recoverer is sent into the gas inlet of the drying kiln through a pipeline; and the control system controls the work of the drying kiln, and controls the humidity of the low temperature gas output by the humidity generator according to the temperature, the humidity and the moisture content of the wood to be controlled in the drying kiln so as to control the humidity of the gas input in the drying kiln. By setting the humidity generator and the heat energy recoverer, the system optimizes the drying quality of the wood and minimizes the energy consumption; and simultaneously, because the working gas is used circularly, the waste gas is prevented from being discharged to the atmosphere to pollute the environment.

Description

technical field [0001] The invention belongs to the field of wood drying, and in particular relates to an energy-saving, environment-friendly and efficient intelligent wood drying method and system. Background technique [0002] Wood drying is an important link and an indispensable process in wood processing, a key technology to ensure the quality of wood products, and an important technical measure for rational and efficient use of wood. To be utilized, wood must first be dried. After drying, the dimensional stability of wood products and the ability of wood to resist insect pests are improved, and the excellent characteristics of wood can be fully reflected. Wood drying is of great significance to wood processing, use, transportation and preservation. [0003] The existing wood drying methods are roughly divided into: conventional drying, high-frequency drying, and vacuum drying. Conventional drying is currently the most common type of application at home and abroad, ma...

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Problems solved by technology

However, this device is expensive and has a small drying volume, which is not suitable for large-scale production and is limited to small batches of precious materials.

[0004] But no matter which drying method is selected, a large amount of energy will be consumed. According to research, the energy consumed by existing wood drying accounts for more than 70% of the energy consumption of the entire wood processing industry; at the same time, wood will release during the drying process. A large amount of waste gas causes pollution to the atmosphere; therefore, all countries are researching efficient, energy-saving and environmentally friendly drying processes, methods and devices for wood

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