The closed loop spray drying process can recover the ccl4 solvent which is of great economic value.Meanwhile,it can reduce the pollution as well as the consumption of energy.

• 干燥过程中采用闭路循环[1]能回收有经济价值的溶剂，减轻环境污染，降低能耗，而且可提高设备效率及产品质量。