论文部分内容阅读
TDI生产装置停车过程中需要破坏大量的光气。为了缩短停车时间,采用碱液循环冷却的光气吸收塔,利用光气与碱液反应,使光气分解掉。通过热量平衡确定出停车时间和碱液罐体积。对该塔进行了模拟和分析,研究了碱液循环量对光气反应速度、塔的尺寸、停车时间、换热面积和循环水量的影响,最终确定出碱液循环量为200 m~3·h~(-1),碱槽体积200 m~3,风机风量12000 N·m~3·h~(-1),塔径3.2 m,停车时间8小时,所需换热面积120m~2,循环水量210 t·h~(-1),需要消耗19%新鲜碱液量总计118 t。此方案缩短了停车时间,提高了生产效率。
TDI production plant parking need to destroy a lot of phosgene during parking. In order to shorten the parking time, the use of lye phosgene absorption cooling cycle, the use of phosgene and lye reaction, the phosgene decomposition. Through the heat balance to determine the parking time and lye volume. The tower was simulated and analyzed. The effects of the amount of lye circulation on phosgene reaction rate, tower size, parking time, heat transfer area and circulating water volume were studied. The result showed that the lye circulation was 200 m ~ 3 · h ~ (-1), caustic tank volume 200 m ~ 3, fan air volume 12000 N · m ~ 3 · h ~ (-1), tower diameter 3.2 m, parking time 8 hours and required heat transfer area 120m ~ The recycled water volume is 210 t · h ~ (-1), which consumes 19% of the fresh lye volume, totaling 118 t. This solution shortens the parking time and improves the production efficiency.