A heat pump drying device

Abstract

The invention relates to a heat pump drying device which is characterized in that the heat pump drying device comprises a film dehumidification device, a drying chamber, a concentrated salt solution regeneration device and a heat pump system. An air circulating loop is formed between the drying chamber and the film dehumidification device. A salt solution regeneration and circulating loop is formed between the film dehumidification device and the concentrated salt solution regeneration device. The heat pump system comprises a first condenser, a second condenser and a first evaporator. The first condenser is arranged in the air circulating loop to heat the air entering the drying chamber. The second condenser is arranged in the salt solution regeneration and circulating loop to preheat the dilute salt solution entering the concentrated salt solution regeneration device, and the evaporator is arranged in the salt solution regeneration and circulating loop to cool the concentrated salt solution regenerated through the concentrated salt solution regeneration device. By means of the heat pump drying device, no energy counteracting exists in the whole drying and circulating process, and thus the drying energy consumption is low.

Description

technical field [0001] The invention relates to a device that can be used for drying biomass (including plants, vegetables, and aquatic products), in particular to a heat pump drying device. Background technique [0002] Drying technology is an important process in many industrial and agricultural production and processing processes, and it penetrates into various fields of the national economy. The traditional drying industry is an industry that consumes a lot of energy. For this reason, a heat pump drying device with relatively low energy consumption and environmental protection is used. The common heat pump drying technology carries out the drying process. When the air from the drying chamber passes through the steam generator of the refrigeration system, it cools the air below the dew point. When the relative humidity of the air is almost saturated, it no longer has the drying ability, and then the saturated air after dehumidification is heated by the condenser heater t...

AI Technical Summary

Problems solved by technology

[0004] The important feature of this heat pump drying device is that it has the weakness of cold and heat offset in the air treatment process, and combines air dehumidification and cooling into one, so the evaporation temperature of the refrigeration system is low and the drying energy consumption is large.

Images