Self-heat recuperation wood drying system and method

Abstract

The invention discloses a self-heat recuperation wood drying system and method and belongs to the field of energy sources and power. The wood drying system comprises a drying tank (1), a compressor (2), a heating coil (3), a heat exchanger (4), a first gas-liquid separator (5), an expander (6), a condenser (7), a second gas-liquid separator (8) and a draught fan (9). According to the self-heat recuperation wood drying system, the dew point temperature of humid air at a drying outlet (11) is increased through compressing of the compressor (2), and latent heat of water vapor in dried air is recycled in an indirect heat exchange mode; evaporation of moisture in wood is accelerated in a wood-air direct heat exchange mode, and then consumed energy of the compressor compressing dry air in the humid air is recycled through acting of the expander; through the process, the heat absorbed in the drying process is transferred back to air in the drying tank so that self-heat recuperation at a high level can be formed, the wood drying system only needs to supplement a part of compression work and wasted work of the draught fan, and then operation can be achieved; and energy consumption is low, pollution is avoided, and the drying speed is high.

Description

technical field [0001] The invention relates to a self-regenerating wood drying system and a working method, belonging to the field of energy and power. Background technique [0002] As a common building material, wood is widely used in various fields of life. In order to facilitate the transportation, storage and direct processing and utilization of wood, it must be dried, and most of the wood drying process at this stage is a process of high energy consumption and high pollution. Under the traditional wood drying system, the total energy consumption of the drying process accounts for about 40% to 70% of the total energy consumption of the enterprise, and the drying efficiency is only 30% to 40%. Therefore, it is of great significance to improve the drying efficiency and save energy. [0003] At present, the most widely used wood drying method at home and abroad is to use atmospheric pressure humid air as the drying medium, use steam, hot water, furnace gas or hot oil as t...

AI Technical Summary

Problems solved by technology

However, the humid air discharged after drying has a low temperature and carries a large amount of latent heat. Due to the limitation of heat transfer temperature difference, it is impossible to effectively recover the latent heat of drying medium and water vapor, resulting in energy waste.

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