摘要
镇海炼化Ⅱ套气分装置目前加工能力为22×104t/a,液化气中丙烯含量为39.89%(物质的量分数),装置年开工时数为8000h。该装置采用AspenPlus流程模拟软件,建立了与实际工况相符合的稳态流程模拟模型。利用此模型,对脱丙烷塔、丙烯塔等进行了灵敏度分析,得出最佳的装置优化数据,并依此研究各塔压力、热负荷、进料位置、回流比等参数间的相互关系,实现装置的优化操作。通过调整脱丙烷塔进料位置、降低脱丙烷塔操作压力、清洗丙烯塔顶空冷器以提高冷却效果等手段,使整个装置的能耗由49.471kg标油/t,下降到45.57kg标油/t,下降了3.901kg标油/t,据此推断,每年可实现节能效益257.5万元;同时,装置优化后,丙烯拔出率增加约0.5%,则计算每年增产丙烯约1000t,测算经济效益为347.2万元/a。两项合计,装置优化后,预计每年可创造经济效益为604.7万元。
Sinopec Zhenhai Refining and Chemical Company＇s gas fractionating unit No.Ⅱ had a processing capacity of 22×10^4t/a.The content of propylene in LPG was 39.89%（mole fraction）.The unit operated 8,000 hours per year.Researchers set up a stable-state process model in conformity with actual working conditions using process modeling software Aspen Plus.These researchers conducted a sensitivity analysis for the depropanizing tower and the propylene tower based on this model and obtained optimum unit optimization data, based on which they studied the correlation between parameters of the towers such as pressure ,thermal load,feed entrance points and reflux ratios in an effort to optimize the operation of the unit.By adjusting the feed entrance points of the depropanizing tower,reducing the operating pressure of the tower and cleansing the air cooler at the top of the propylene tower to improve cooling effect ,the researchers reduced the overall energy consumption of the unit to 45.57kg of oil equivalent per ton from 49.471kg of oil equivalent per ton.As a result of the optimization,the energy costs of the unit could drop by 2.575 million Yuan per year.Mter theoptimization,the yield of propylene from the unit increased by about 0.5%.Propylene output will rise by around 1,000t per year,the equivalent to an increase of economic returns of 3.472 million Yuan per year. The overall economic benefits from the optimization of the unit are expected to reach 6.047 million Yuan per year.
出处
《中外能源》
CAS
2010年第5期88-91,共4页
Sino-Global Energy
关键词
流程模拟
气体分馏
模型
灵敏度分析
process modeling
gas fractionation
model
sensitivity analysis
