【摘要】 针对本单位合成工艺中洗涤用丙酮溶剂,进行了常压蒸馏方法的循环回收利用工艺开发。采用分段蒸馏方式,有效避免了蒸馏工艺中出现丙酮爆沸的风险;采用蒸汽阀开闭自动控制的方式,有效控制加热温度,有效避免触发超温报警;采取每次蒸馏前排放底部残存液,及70℃阈值时排空废弃液的方式,避免堵塞底阀的风险;本工艺经实验室、小试和中试,均获得合格产品,具有技术可行性。本工艺经改进应用,安全可行,历年的丙酮回收率稳定在85%,具有较好的经济效益和社会效益。更多还原

【Abstract】 Acetone solvent as washing agent within our synthetic production line was concerned and its recycling process was developed with atmospheric distillation method. Here, segmented distillation was employed to eliminate intense boiling of acetone effectively, automation of steam valve latch-release manner was introduced to eliminate over-temperature alarm entirely and control heating temperature precisely, discharge of bottom residue before distillation and drain of reactor while reaching of 70 ℃ threshold should be effective to avoid bottom valve block. The recycling process was attempted for lab-scale, bench-scale, and pilot scale production and lead to qualified product totally, which revealed technical feasibility of the process. The recycling process was applied to show efficient safety,acetone recovery rate high up to 85 %, and preferable economic and social benefit.更多还原