A drying device and method for continuously drying wood using solar energy

Abstract

The invention discloses a device and method for continuously drying wood by using solar energy. The device includes a solar drying kiln with auxiliary heat, a heat storage system for storing excess heat in the process of wood solar drying and discharging heat from a high-temperature and high-humidity medium in the drying kiln. The heat system is set on the outside of the longitudinal side wall of the drying kiln. At the same time, the device is also equipped with an auxiliary heat source; the device is used to absorb the excess heat in the process of wood solar drying and the heat of the medium discharged from the drying kiln for night wood drying. Accurately measure the heat stored in the heat storage material in the heat storage system, accurately supplement the amount of auxiliary heat source used in night drying, and realize the continuous drying process of wood. The device of the invention has a simple structure, realizes the synergistic drying process of solar energy and auxiliary heat, accurately matches the consumption of wood and heat storage materials, and detects the energy consumption stored in the heat storage materials, accurately controls the drying process, and realizes continuous drying of solar energy. The wood is of high quality with few drying defects.

Description

technical field [0001] The invention relates to a solar drying method with a heat storage system, in particular to a solar pre-drying method for wood with a heat storage system. Background technique [0002] Wood drying is a necessary link in the process of wood product processing, and its energy consumption accounts for about 40-70% of the total energy consumption in the process of wood product processing. The traditional conventional drying process uses fossil energy, which has problems such as high energy consumption and serious pollution. As a clean energy source, solar energy is inexhaustible and is used in the drying process of various biomass such as food and wood. However, because solar energy is intermittent and unstable, it cannot be used in rainy weather and at night, so its application process is severely limited. Phase-change heat storage materials can store relatively more energy in a smaller volume, and are widely used in solar drying processes. [0003] Fo...

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Problems solved by technology

[0006] The purpose of the present invention is to address the intermittent nature of solar energy that occurs in the existing solar drying process, which cannot continuously provide energy for the drying process, and the heat storage capacity of heat storage materials in the existing solar drying process cannot be measured, and the heat energy of waste gas cannot be reused and The technical problem of continuous drying is to provide a device for continuously drying wood using solar energy and a method for continuously drying wood using the device. The device of the present invention absorbs the heat in the solar drying process during the day and absorbs the high-temperature and high-humidity waste gas to be discharged from the drying kiln. heat, which improves the utilization efficiency of heat, reduces the emission of exhaust gas, and avoids thermal pollution; the method of the present invention accurately calculates the heat storage capacity of the heat storage system, and provides accurate guidance for the opening of the auxiliary heater at night or when solar energy is insufficient, maximizing Save energy; the invention adopts the method of combining continuous drying during the day and boring kiln drying at night to eliminate the drying stress generated during the daytime drying of wood, reduce the moisture content gradient, reduce drying defects such as wood cracking, and improve the drying quality of wood

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