With the increase of people's health awareness, many people abandon the sweet and greasy milk tea and begin to favor the sweet and sour fruit tea. Fruits are rich in vitamin C, have low calories and no burden, and are loved by many consumers. There are many fruit tea bags on the market, and drying is an important part of the production process.
The traditional drying methods are coal-fired boilers, gas-fired boilers or biomass boilers. These drying methods will cause great pollution to the environment and do not meet the government's environmental protection requirements; harmful gases generated during operation may also It brings secondary pollution to dried fruits, and labor costs are also high.
At present, many dried fruit production enterprises adopt electric heating or microwave drying methods, which have high operating costs and short service life. Air source heat pump drying absorbs the heat in the air, and can generate doubled heat with a small amount of electric power. The operating cost is about half of electric heating or microwave drying, and the energy saving is very prominent. The air source heat pump is highly intelligent, and the temperature and humidity can be precisely controlled through a mobile phone or computer to ensure the quality of drying. In addition, the air source heat pump drying equipment has a service life of up to 15 years, which is unmatched by other drying methods.
According to the relevant technical personnel of Hua Tiancheng, a professional brand of air source heat pump drying, air source heat pump drying uses the reverse Carnot principle. The gas freon is pressurized by the compressor to become high temperature and high pressure gas (temperature up to 100 ℃), which enters the indoor side. Heater (condenser), the refrigerant condenses and liquefies to release high-temperature heat to heat the air in the drying room. The materials in the drying room vaporize and evaporate the moisture in the materials in the form of hot air, and the evaporated water vapor is discharged by the dehumidification system to achieve the purpose of drying the materials.
The refrigerant after condensation and heat release passes through the throttle valve and becomes a low-temperature and low-pressure liquid. Due to the sudden drop in pressure, the liquid refrigerant enters the evaporator and will continuously absorb the low-level heat energy of the surrounding air and quickly evaporate into a gaseous state, and the refrigerant that has absorbed a certain amount of energy will return To the compressor, enter the next cycle. In this way, the continuous circulation of the refrigerant realizes the transfer of heat in the air to the drying room to heat the air temperature in the room, thereby achieving the purpose of drying.
The person in charge also said that the quality of fruit tea is very important, and the bright color and delicious taste are indispensable. Air source heat pump drying can reasonably adjust the temperature and humidity in the drying process according to the drying needs of different fruits, ensuring the quality after drying, and retaining as much as possible the color, appearance and nutrients of the fruit itself. Air source The heat pump drying process is gentle, the dried fruit is not easy to crack after drying, and the rehydration after soaking in water is better.
Take the mulberry breeding base in Dechang County, Sichuan as an example. The base considered the use of traditional coal-fired drying rooms when building a new drying room. However, the coal-fired drying room is not easy to control the drying temperature and will affect mulberries. Dry belt to remove secondary pollution; if the temperature does not meet the requirements, the moisture in the mulberries cannot be removed in time, and mold will occur.
After understanding the safety and health advantages of air source heat pumps in drying, users changed to heat pump drying, each equipped with two Huatiancheng air source heat pump drying and dehumidification integrated machines. Mulberries are placed in layers on trays and carts. The drying temperature is 40°C to 55°C, and the drying time is 30 to 40 hours.
Compared with the traditional baking room before, heat pump drying greatly improves the efficiency and quality of mulberry drying. The drying method is safer, energy-saving and worry-free. The quality of dried mulberries is better, appearance is better, and the pass rate is higher. High, perfectly solves the drying problem of growers, and has won the trust of growers.