摘要
选用乙烷、丙烷、液化石油气(LPG)、石脑油和加氢裂化尾油等5种有代表性裂解原料的裂解气,对低能耗乙烯分离技术(LECT)前脱丙烷前加氢流程中的急冷、压缩到两个前脱丙烷塔,逐一进行模拟计算和研究。结果表明:裂解气中的C3's越少,进入脱丙烷系统的汽油量越大,前脱丙烷高压塔的釜温越高;釜液中汽油比例越高则低压塔釜温也越高;裂解气中的汽油组分提前分出对控制前脱丙烷塔的釜温是有益的。前脱丙烷前加氢流程适应于以LPG、石脑油和加氢裂化尾油等重质原料为主的乙烯装置。
This paper carries out simulation calculation and study respectively on quench,compression and front-end depropanization areas of LECT(Low Energy Consumption Technology) ethylene recovery section using five typical charge gases steam-cracked from ethane,propane,LPG,naphtha and HCR.The result shows that the less the C3 concentration in charge gas and the more the pyrolysis gasoline feeding into depropanizers,the higher the bottom temperature of high pressure front-end depropanizer;and the bigger the gasoline ratio in bottom effluent of low pressure front-end depropanizer,the higher the bottom temperature.Separating gasoline components from charge gas in advance is useful to decrease the bottom temperature of front-end depropanizers.The front-end depropanization and acetylene hydrogenation process is applicable to ethylene plant mainly processing heavy feedstock including LPG,naphtha and HCR.
出处
《乙烯工业》
CAS
2012年第4期11-15,1,共5页
Ethylene Industry
