1.Low temperature stage
Use a heat pump dryer to remove as much moisture as possible from the surface of the rice noodles at this stage, and gradually increase the temperature to make the inside and outside temperature of the rice noodles consistent. The temperature generally set at about 25 degrees.
2.High temperature stage
After the rice noodle enters the high temperature stage, the internal moisture is gradually evaporated, the rice noodle is dried evenly, and the shape is good. The temperature generally set at about 38 to 42 degrees. Avoid the explosion caused by excessive drying.
After entering the cooling stage, the drying process of rice noodles is basically completed. This stage is a process of decreasing temperature. The temperature is controlled according to the climate conditions and the actual dryness and wetness conditions of the rice noodles. Keep the temperature decreasing gradually and prevent the rice noodles from cooling down too quickly, so that the surface temperature could keep consistent with the internal temperature, and the bubble phenomenon will not occur, and the rice noodles will not burst.
According to different regions and types of rice noodle, the drying time of rice noodle is generally 8-12 hours. The baked rice noodles will not change color and will not break, the dryness is uniform, the color is good, the taste is good, and the rehydration capacity is good. This type of dryer is also suitable for drying noodles, sweet potato flour, etc.