基于溶液除湿的粮食干燥机组性能仿真

Performance simulation of grain drying unit based on solution dehumidification

针对目前粮食干燥过程能耗高、存在粮食浪费问题,设计基于溶液除湿的新型粮食干燥机,机组使用氯化锂作为除湿溶液,利用热泵驱动溶液的除湿和再生;对机组空气处理装置进行仿真,研究LiCl溶液的温度、浓度和质量流量对系统除湿性能的影响。结果表明:环境参数稳定时,结合溶液再生要求,采用14℃、27%的LiCl溶液,质量流量控制为4 kg/s时,机组能够获得最佳粮食干燥性能。

Aiming at the problems of high energy consumption and food waste in current grain drying process, a new type of grain dryer based on solution dehumidification was designed. The unit uses LiCl as the dehumidifying solution,and uses a heat pump to drive the dehumidification and regeneration of the solution. The air handling device of the unit was simulated, and the effects of the temperature, concentration and mass flow of LiCl solution on the dehumidification performance of the system were studied. The results show that when the environmental parameters are stable, combined with the solution regeneration requirements, the unit can obtain the best grain drying performance when the LiCl solution at 14 ℃ and 27% is used, and the mass flow is controlled at 4 kg/s.