流程模拟在NCMA脱碳装置设计方面的应用

Application of process simulation on design of NCMA decarbonization device

介绍了NCMA技术的研发背景及其在镇海炼化的应用,在掌握大量实验数据基础上,采用Aspen Plus软件模拟整个脱碳流程,并用于镇海炼化16×104t/a催化脱硫干气脱碳装置的工艺设计与优化;通过模拟计算,研究了贫液酸气含量、贫液温度等参数对吸收指标的影响,结合项目要求的产品气控制指标,从中优选了最佳操作条件;研究了塔径及填料高度对吸收再生性能的影响,得到了优化的塔条件。基于模拟计算所设计的脱碳装置在镇海炼化得到了成功应用,自2010年6月投入使用以来,各项指标均达到设计要求,生产操作稳定,每年可从催化脱硫干气中回收乙烯2.96×104t,该装置每年产生直接经济效益15 830×104元/a。

The background of NCMA technology and its practical application in Zhenhai Refining ＆ Chemical Company were introduced. Based on large number of known experimental data, the full decarbonization process was systematically simulated by Aspen Plus, which was used for the process design and optimization of the decarbonization unit of 160 000 t/a catalytic desulfurization dry gas device in Zhenhai Refining ＆ Chemical Company. The loading content and temperature of lean solvent into the absorption capacity were exploited as the key parameters, and the optimized operating condition was explored which should meet with product quality requirement of project target. The influence of column diameter and packing height into the absorption-regeneration efficiency were studied to obtain the optimum index of column. The decarbonation device designed with process simulation was successfully applied in Zhenhai Refining ＆ Chemical Company. Since its successful operation in June 2010, the device has appeared with reasonable indicators adaptive to design requirement, stable production operation and 29 600 t/a ethylene recovery from catalytic dry gas, leading to direct economic benefit of 158.3 million RMB/year.