Drying of rice and other crops is a heat-sensitive rice crop drying too fast or improper selection of parameters easier to crack. Composite paddy rice drying characteristics and to achieve quality and other factors, drying rice need to pay attention to the following measures:
(1)Select Preheat-dry-sustained-cooling-row grain of process, and "dry-sustained" of process according to the amount of drying rice to determine altogether with ranks. That rice drying entered sustained segment insulation a time, which is grain internal water to surface diffusion, reduced grain internal of water gradient. Then entered II times dry-sustained, common of sustained and dry time of ratio for 5~8:1, such it can reduced burst waist.
(2)A lower air temperature. In order to ensure the quality of dried rice and reduce the crack ratio, low air temperature must be used. If the temperature is 38~40℃, the crack ratio value less than 2% of rice crack during drying. The heat is not only related to air temperature but also related to the initial moisture content of rheumatism and rice.
(3)Limit the drying rate of rice. Rice drying or cooling too quickly are prone to crack. In order to ensure the quality of rice drying, drying speed is not too large, and that should generally be controlled below 1.5%, hourly precipitation rate is not greater than 1.5%.
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