顺丁橡胶溶剂回收装置的节能技术

李建军　 罗军　 修志强　

摘　要：介绍了顺丁橡胶生产装置溶剂回收单元的工艺流程及操作状况,用己烷溶剂取代抽余油后,进行了降低溶剂脱重塔(T-463)塔釜温度及其回流量的可行性计算,分析了改造溶剂脱水塔(T-462)塔釜采出溶剂的工艺可行性.结果表明,将T-463塔釜温度由(108±5)℃降低到(100±5)℃,不仅稳定了系统操作,而且降低了能耗;将T-463回流量由16.00 t/h降至8.00 t/h,并未降低到最低回流量3.36 t/h;T-463进料量最少应保持在44.02 t/h,按照T-462塔底排出物料流量80.00 t/h计算,T-462塔底最多采出量为35.98 t/h;通过合理变更T-462、T-463的工艺参数,溶剂回收单元的能耗得到了降低.
关键词：顺丁橡胶;溶剂回收单元;己烷;抽余油;脱水塔;脱重塔
分类号：TQ333.2 　文献标识码：B
文章编号：1000-1255(2009)04-0269-06

Energy saving technology applied to solvent recovery unit of cis-1,4-polybutadiene rubber

Li Jianjun（Synthetic Rubber Business Division,Beijing Yanshan Petrochemical Co Ltd,SINOPEC,Beijing 102503,China）　 Luo Jun（Synthetic Rubber Business Division,Beijing Yanshan Petrochemical Co Ltd,SINOPEC,Beijing 102503,China）　 Xiu Zhiqiang（Synthetic Rubber Business Division,Beijing Yanshan Petrochemical Co Ltd,SINOPEC,Beijing 102503,China）　

Abstract：The process and operation status of solvent recovery unit of cis-1,4-polybutadiene rubber were introduced. The feasibility of lowering bottom temperature and reflux flow of de-heavy fractionator was analyzed based on chemical engineering calculation after raffinate oil was replaced with hexane as polymerization solvent. The feasibility to regulate the recycling flow of output in dehydrating column bottom was also analyzed. The results showed that not only the system operation was stabilized but also the energy consumption was reduced by lowering bottom temperature of de-heavy fractionator from (108±5)℃ to (100±5)℃. The reflux flow of the fractionator was adjusted from 16.00 t/h to 8.00 t/h, not to the minimum reflux rate 3.36 t/h. Its minimum feed flow should be no less than 44.02 t/h. When the output of dehydrating column was 80.00 t/h, the maximum recycling flow of the column was 35.98 t/h. The energy consumption of solvent recovery unit was remarkably reduced by rational alteration of process parameters of dehydrating column and de-heavy fractionator.
Keywords：cis-1,4-polybutadiene rubber;solvent recovery unit;hexane;raffinate oil;dehydration column;de-heavy fractionator