How many degrees should the dryer set to dry rice?

The export standard temperature of rice is generally 60℃, and that of wheat and soybean is generally around 50℃. Grain with high moisture content should be dried repeatedly to ensure grain quality. According to the grain variety, moisture content and storage and processing requirements, the drying times and precipitation amount are determined. Generally, once dried, the water content of japonica rice is 18%, which can be reduced to the standard; twice dried, the water content is 16%-20%, which is appropriate to ensure the quality of rice.

The rice to be dried must be washed first and then dried to ensure the quality of the supplied grain and reduce the heat consumption. After drying, the grain must be slowed down for 24 hours and then cooled. When the grain slowed down by the counter-current cooling tower is filled to more than two thirds in the tower, the grain layer should be ventilated to maintain a certain height and the grain should be discharged at intervals. After cooling, the grain temperature should not exceed 5℃.

Make sure the amount of cold air is appropriate, and do not suck out particles. For example, if it is equipped with a ventilation bin for cooling, the air duct should be about 1.5-2 meters. The height of a general granary is 22.5 meters. When ventilating, turn the grain surface, and finally cover the grain surface with grass to prevent condensation.

Extended data:

Because of the different harvest seasons of various crops and the large temperature difference between north and south during drying, it is necessary to consider the drying effect and operating cost. For example, coastal areas should try to avoid drying grains in low temperature and humid weather, otherwise the dehydration effect will be poor, the productivity will be low and the drying cost will be high.

Nearly half of the time in northern China is dry below 0℃. The lower the outside temperature, the higher the unit heat consumption and the higher the cost. Therefore, heat preservation should be added to the outer wall and hot air pipeline of dryers operating below 0℃ in the north to reduce heat loss.