D. The drying quality is better than that of coal-fired process
The temperature of coal-fired process is controlled by adding coal and wood manually. During the period, the temperature will rise and fall suddenly, and the temperatrue control is not good, which will cause the phase damage to the dried materials.
However, air source heat pump dryer uses PLC to control temperature and humidity, which can control the temperature error in the range of 0.5 degrees to meet the material for the drying process. In order to complete the suitable drying curve for materials and ensure good color, appearance and so on.
Moreover, the high temperature of coal combustion will cause the loss of beneficial and useful ingredients in the material with the moisture and volatile air.
E. The dried products are consistent
As far as the coal-fired drying process is concerned, the uniformity of hot air discharged from the coal-fired hot blast stove into the drying room is not uniform, which will result in premature drying of some materials in the high-temperature area, while the materials in the low-temperature area have not yet been dried, and will result in mildew of some materials in the drying process, leading to the emergence of defective products.
The Air source heat pump dryer adopts scientific and reasonable air duct design. To ensure that the temperature and air volume of each part of the drying room are basically the same, so as to ensure the uniformit of material drying.
F. No potential safety hazard
In the process of coal-fired drying, there is open fire, and the drying temperature and pressure are too high, so there are potential safety hazards. Air source heat pump drying technology, intelligent control of equipment temperature and humidity, temperature will not be too high, and there is no open fire and other security risks.
G. The heat pump dryer process can recover useful volatile components
such as rose dew, which evaporate from the material to the beneficial components in the drying room. It can be recovered and condensed into water by air source heat pump.