The application of process simulation to the technological transformations of Depropanizer in Daqing has been proved to be successful.
运用过程模拟技术，成功地完成了大庆脱丙烷塔的技术改造。
Optimization with HYSYS system on depropanizer operation for cracking unit can reduce propylene loss and ensure the high quality C4 product.
通过HYSYS模拟系统，来优化裂解装置脱丙烷塔的操作，减少丙烯损失，保证C4产品质量。
The necessity of C_3 hydrogenation unit existence in front depropanizer front hydrogenation flow of ethylene plant is studied and fully discussed.
对乙烯装置前脱丙烷前加氢流程中的C_3加氢单元存在的必要性作了探讨。
Recent progress in world ethylene separation technology were reviewed and compared including sequence process, front-end deethanizer process, front-end depropanizer process.
综述了世界乙烯装置分离技术特点与最新进展，对顺序流程、前脱乙烷、前脱丙烷等三大乙烯分离流程进行了分析比较。
Causes for clogging in LP Depropanizer are analyzed and methods for optimizing the operation to alleviate the clogging are proposed, thus ensuring the long cycle of the column.
对低压脱丙烷塔堵塞原因进行分析，并提出优化操作减缓堵塞的方法，保证了该塔长周期运行。
Causes for clogging in LP Depropanizer are analyzed and methods for optimizing the operation to alleviate the clogging are proposed, thus ensuring the long cycle of the column.
对低压脱丙烷塔堵塞原因进行分析，并提出优化操作减缓堵塞的方法，保证了该塔长周期运行。
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