Affected by the season, agricultural products generally have high moisture content after harvest, which is not good for long-term storage. They usually need to be dried to extend their shelf life and facilitate transportation. In the development of the drying industry of agricultural products, such technologies as vacuum freeze drying, solar drying, microwave drying, heat pump drying and so on have emerged.
Kcalin air-source heat pump drying unit, as a safe, environmentally friendly and energy-saving drying equipment that can replace the traditional drying method, has been widely used in the drying of tobacco, tea, medicinal materials, dried fruit food, aquatic products, grain and other agricultural and sideline products, as well as the drying and dehydration of chemical materials and industrial products.
Traditional drying methods such as sun drying, electric heating drying, coal burning and wood burning, microwave drying, etc. have the following disadvantages:
1. High energy consumption and low efficiency, the heat absorption utilization rate is only 30% - 60%.
2. It requires manual supervision and operation, and the labor cost is high.
3. Fuel and gas have potential safety hazards such as flammability and explosion.
4. Due to serious pollution and corrosivity, the service life is greatly shortened.
5. It will release a large amount of exhaust gas and waste residue, which will pollute the environment.
6. The temperature and humidity cannot be accurately controlled, and the color, appearance and nutrition of the finished product cannot be controlled.
So how do air-source heat pump dryers solve these problems?
Kcalin air-source heat pump dryer is a drying and dehumidification machine; A small amount of electric energy is used to convert the low level heat energy in the air into high level heat energy through the inverse Carnot principle, which means that the temperature in the drying room rises, and a large amount of hot air is circulated in the box, and then discharged from the dehumidification outlet, and enters the internal circulation again after dehumidification treatment; So as to increase the heat transfer effect and gradually reduce the moisture content of materials in the drying room.
Because the heat pump dryer recovers the low-grade waste heat of the drying medium while dehumidifying and drying, and uses the recovered waste heat for drying and heating again after heating up. Compared with the conventional drying equipment, the energy saving rate is 40% - 70%.
What advantages do air-source heat pump dryers have besides energy saving?
Adopt environment-friendly air energy and zero pollution during drying; The drying process operates automatically without the need for special personnel to be on duty; Temperature and humidity can be adjusted to meet the drying requirements of different kinds of materials; Not affected by the weather, the drying time is greatly shortened; During drying, the materials will not be deformed, cracked or deteriorated, and the loss of nutrients will be small.