Technique and system for hot-air sealed circulation efficient drying and energy saving

Abstract

A technique for hot-air sealed circulation efficient drying and energy saving comprises six technique links, namely hot air cooling, dehumidification, heat energy transferring, temperature raising, drying and heat energy recycling and comprehensive utilization. In the cooling link, the temperature of returned air is reduced below the vapor dew point, in the dehumidification link, condensed water is separated and removed, in the heat energy transferring link, heat energy is absorbed and transferred, heat energy is directly fed back for use or recycled after transferring, in the temperature raising link, feedback heat energy and condense water sensible heat are used for warming dry inlet air, in the drying link, warmed high-temperature dry inlet air is used for drying wet materials, in the heat energy recycling and comprehensive utilization link, dehumidified and condensed water with high temperature is collected, heat energy of a technique system in hot air cooling, drying interruption or stopping is recycled, and meanwhile other remained energy generated in or out of the collection system is collected. The technique and system are high in drying efficiency, reduce return air or do not exhaust return air, and can fully utilize various remained energy generated in the drying process, and particularly recycle heat energy which is easily lost.

Description

technical field [0001] The invention belongs to the technical field of hot air drying. Background technique [0002] The traditional hot air drying process system is to discharge part or all of the high-humidity return air (hot air from the drying device after absorbing moisture) to the outside of the system, and then heat the new "dry" air by supplementing new heat sources to maintain the normal operation of the drying system, which can High consumption and high operating costs. In the prior art, there is a technology that uses the principle of heat pump dehumidification and drying to make the return air circulate between the drying chamber and the heat pump dryer in a closed loop to reduce heat energy consumption, but there is a lack of sufficient heat energy recovery and comprehensive utilization means, and there is heat energy loss. Low energy utilization rate and poor energy saving effect. In addition, in the drying process, the dehumidification heat energy is not rec...

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Problems solved by technology

[0002] The traditional hot air drying process system is to discharge part or all of the high-humidity return air (hot air from the drying device after absorbing moisture) to the outside of the system, and then heat the new "dry" air by supplementing new heat sources to maintain the normal operation of the drying system. High consumption, high operating costs

In the prior art, there is a technology that uses the principle of heat pump dehumidification and drying to make the return air circulate between the drying chamber and the heat pump dryer in a closed loop to reduce heat ene

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