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当粮面温差在7℃～8℃容易结露,通过改变粮仓内热量传导方式(即对流传热变为传导传热)使粮食表层梯度温差在5℃以内,从而预防粮食表面结露。200亿斤国投砖圆仓气密性和隔热性好,利用冬季低温,结合机械通风,在春季采用袋积稻壳与塑料薄膜结合,对全仓粮面进行密闭保温隔热,达到了低温储藏的目的,克服了砖圆仓仓顶隔热性能差,上层粮温上升快的缺点,起到了减少温差,稳定粮情,延缓品质劣变,降低保管费用的作用。
When the temperature difference between grain surface and surface is easy to dew at 7 ℃ ~ 8 ℃, the surface temperature gradient of grain surface is within 5 ℃ by changing the heat conduction mode in the silo (ie convection heat transfer becomes heat conduction), so as to prevent the surface condensation of grain. 20 billion kg State vote brick silo tight and heat insulation is good, the use of low temperatures in winter, combined with mechanical ventilation, in the spring with a bag of straw and plastic film combination, the whole grain noodles sealed heat insulation, reached The purpose of low temperature storage overcomes the shortcomings of poor thermal insulation performance at the top of brick silos and rapid rise of upper grain temperature, and plays the role of reducing temperature difference, stabilizing grain conditions, delaying quality deterioration and reducing storage costs.