Working Principle of High Temperature Heat Pump Drying Unit

The main principle of heat pump used in drying process is to use heat pump evaporator to absorb heat from outside air, or to recover waste heat from exhaust gas in drying process. After the work of compressor, the energy is transferred to oven (oven). The hot air in oven is heated repeatedly, absorbed moisture in material, cooled and humidified by itself, and dehumidified by hot air or condensation. In the process of water, the water in the material is discharged and taken away, and eventually the continuous drying of the material is realized. High temperature heat pump (drying) technology features:

1, high stability: the primary requirement of industrial high temperature heat pump is reliable quality, stable operation, in order to meet customer continuous production requirements. Therefore, in the control and protection of important parameters such as exhaust pressure, exhaust temperature, overflow, overheat and overload of the compressor, the heat pump dryer is precisely designed and strictly controlled to ensure the stable and reliable operation of the heat pump system under safe conditions.

2, strong ability of timely heating: heat pump adopts direct heating mode and high efficiency heat transfer mode. The direct air outlet temperature of heat pump unit reaches above 85 C, and the heat pump unit has strong ability of timely heating.

3, high outlet temperature: the highest outlet hot air temperature is 110 C. High temperature heat pump hot air system can also be widely used in industrial fields. Such as food drying, wood drying, herbal medicine drying, tobacco drying, paper products drying, meat products drying, fruit and vegetable drying, tea, flower tea drying, seed drying, crude oil heating, edible fungi drying, agricultural and sideline products drying, etc.

4, low operation cost: the operation cost of high temperature heat pump is equivalent to that of coal-fired heat pump, and 50%-80% less than that of fuel, electricity and gas energy-consuming equipment.

5. Green environmental protection: There are no three wastes (waste water, waste gas, waste residue) in the operation process, no pollution to the environment, and green environmental protection. High temperature heat pump technology solves the problem of low temperature of ordinary heat pump, can replace the use of heating boilers, reduce the emission of harmful gases caused by the use of coal-fired and oil-fired boilers, improve the quality of atmospheric environment, make full use of renewable resources and save conventional high-quality energy, which is more conducive to the sustainable development of society and has good economic and social benefits. The scenery is vast.

6. Good quality of dried products: Heat pump drying is a mild drying method, close to natural drying. The evaporation rate of surface water is close to that of internal water moving to the surface, which makes the dried products of good quality, good color and high grade.