Closed dehumidification water-water heat pump drying system with multiple drying rooms

Abstract

The invention relates to a closed dehumidification water-water heat pump drying system with multiple drying rooms. The closed dehumidification water-water heat pump drying system comprises a water-water heat pump, a hot water tank, an energy storage water tank and a plurality of drying rooms. A heating coil, a heating axial flow fan, a dehumidification coil and a dehumidification fan are arrangedin each drying room. Hot water generated by the water-water heat pump enters the hot water tank through a pipeline, the hot water in the hot water tank is pumped into each heating coil by a heating water pump through a heating water pipeline, and the hot water conducts heat exchange through the heating coil and then returns to the hot water tank through a first water return pipeline. The water inthe hot water tank enters the water-water heat pump through a water pump on a condensation side. Chilled water generated by the water-water heat pump enters the energy storage water tank through a pipeline. The cold water in the energy storage water tank is pumped into each dehumidification coil by a dehumidification water pump through a dehumidification pipeline, and the cold water conducts heatexchange through the dehumidification coil and then returns to the energy storage water tank through a second water return pipeline. The cold water in the energy storage water tank enters the water-water heat pump through a water pump on an evaporation side. The system saves energy, is environmentally friendly and has high drying quality.

Description

technical field [0001] The invention relates to a drying system, in particular to a closed dehumidification water-water heat pump drying system with multiple drying rooms. Background technique [0002] At present, the main method of drying tobacco, traditional Chinese medicine, wood and crops is to use coal-fired heating. Due to its pollution, coal-fired heating is increasingly restricted, and it is imperative to replace coal-fired heating. The air source heat pump system is an ideal way to replace coal-fired heating due to its characteristics of no emission pollution and simple system. At present, the evaporator of the air source heat pump system is a finned heat exchanger, and its heat extraction method is to extract heat from the environment, which causes the efficiency of the unit to be greatly affected by the ambient temperature. Especially in northern China, when the ambient temperature is low, the COP of the unit is low, which makes the operation energy consumption o...

AI Technical Summary

Problems solved by technology

The disadvantage of this dehumidification method is: when the outdoor environment is humid, the difference between the humidity content of the indoor air and the outdoor air becomes smaller, and the required fresh air volume increases, resulting in an increase in the energy consumption of the unit; even the ambient humidity is particularly high When the fresh air volume is added to the maximum, the humidity in the drying room still cannot meet the process requirements, resulting in the deterioration of the quality of the dried material

For the number of drying rooms at the drying point is more than 20, since each drying room uses the same air source heat pump, the initial investment cost is relatively high

Images