Heat pump type drying device

Abstract

The invention discloses a heat pump type drying device. A water tank is arranged in a heat preserving enclosure; water is injected in the water tank to immerse a spiral coil pipe A and a spiral coil pipe B in the water tank; a compressor A, the spiral coil pipe A, a capillary pipe A, a coil pipe A and relevant pipelines form a heat pump cycle dehumidifying system A; a compressor B, a coil pipe B, a capillary pipe B, the spiral coil pipe B, an outer coil pipe and relevant pipelines form a heat pump cycle heating system B; the system A achieves cooling in the heat preserving enclosure and condensation drainage of vaporous water, and heat released during cooling and condensation of the vaporous water is stored in the water tank; the system B achieves temperature rising in the heat preserving enclosure and the operation of vaporizing water in materials into the heat preserving enclosure and absorbs the heat stored in the water tank by the system A; and the system A and the system B alternately work to achieve evaporation, condensation and drainage of the water in the materials in the heat preserving enclosure and storage and utilization of the heat in the water tank. Compared with an existing gaseous state dehumidifying and drying manner, energy consumption is greatly reduced, and zero emission of refrigerating and dehumidifying heat can be achieved.

Description

technical field [0001] The invention relates to a heat pump drying device. Background technique [0002] Drying device is a very widely used equipment, widely used in biology, medicine, chemical industry, agriculture and other fields. The drying process is essentially the process of discharging the moisture in the material. However, almost all of the existing drying equipment uses direct heating to discharge the moisture in the material in the form of gaseous water. Because the enthalpy of gaseous water is much higher than that of liquid water And the temperature is relatively high, so a large amount of energy is also discharged when the gaseous water is discharged, which inevitably causes a large amount of heat energy loss, which is obviously not in line with my country's current energy-saving and emission-reduction policies. [0003] On the other hand, most of the heating methods of existing drying equipment are direct heating, that is, direct heating by steam or electrici...

AI Technical Summary

Problems solved by technology

The drying process is essentially the process of discharging the moisture in the material. However, almost all existing drying equipment uses direct heating to discharge the moisture in the material in the form of gaseous water. Because the enthalpy of gaseous water is much higher than that of liquid water And the temperature is high, so a large amount of energy is also discharged when the gaseous water is discharged, which inevitably causes a large amount of heat energy loss, which is obviously not in line with my country's current energy-saving and emission-reduction policies

[0003] On the other hand, most of the heating methods of existing drying equipment are direct heating, that is, direct heating by steam or electricity or heat transfer oil, but the thermal conversion efficiency of direct heating is low, and the thermal conversion rate of large boilers can only reach About 90%, while the heat pump heat transfer energy efficiency is relatively high, up to 3 or more, which greatly improves the heat energy utilization efficiency and realizes energy saving and emission reduction

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