Infrared drying1

  Another method of drying the micelles is an infrared drying process. In convection heating, the thermal conductivity between the gas and the colloidal particles, between the colloidal particles and the colloidal particles, and within the colloidal particles is very low, so the heat conduction is greatly limited. With infrared drying, because the molecules are exposed to infrared radiation, the absorbed energy is directly converted into thermal vibration, which means that the heating of the material is faster than in convective drying. In contrast to convection heating, infrared drying has an inverse temperature gradient in addition to the partial pressure difference between the ambient air and the moisture in the colloidal particles during the drying process. In general, the greater the temperature difference between the drying gas and the heated particles, the faster the drying process. Infrared drying time is usually 5min ~ 15min. At present, the infrared drying process has been designed as a turn-to-tube mode, that is, following a rotating tube with a threaded inner wall, the rubber particles are transported and circulated, and there are several infrared heaters in the central section of the rotating tube. In infrared drying, the power of the device can be selected with reference to the standard of 0.035 kWh/kg?0.105 kWh/kg.