摘要
为提高乙烯及双烯(乙烯和丙烯)收率,采用SPYRO软件对某炼厂140万t/a乙烯装置乙烷裂解炉进行了模拟优化计算。结果表明:在相同的裂解炉出口温度(COT)下,计算得到的产物组成和实际的产物组成相近,乙烷转化率、乙烯收率模拟值与实际值最大偏差分别为0.52%,-0.89%,绝压比(物料进入文丘里管后的压力与进入文丘里管前的绝对压力比)最大偏差为0.05;在第8,38,60 d,最大管壁温度测量值与模拟值的偏差分别为4,3,2℃,说明该模型能准确模拟实际的操作工况;随着稀释比增加,乙烯和双烯收率均增加,绝压比减小,在相同乙烷转化率下,COT降低;在稀释比为0.43,采用COT逐步升高的最优操作条件下,乙烷转化率为61%时,乙烯收率由优化前的48.20%提高至48.90%。
In order to improve ethylene′s and the two olefen′s(ethylene and propylene)yield,simulation and optimization calculation on the cracking furnace that used ethane as feedstock in the 1.4 Mt/a ethylene cracking unit were carried out with SPYRO software.The results showed that under the same coil outlet temperature(COT),the calculated product composition was similar to the actual product composition.The maximum deviation between the simulated values and the actual values on ethane conversion and ethylene yield were 0.52%,-0.89%respectively.The maximum deviation of absolute pressure ratio(outlet and inlet absolute pressure ratio of venturi)was 0.05.The deviation between the measured value and the simulated value for the maximum tube metal temperature(MTMT)at the 8th,38th and 60th d were 4,3 and 2℃respectively,indicating that the model could truly simulate the actual operating conditions.With the increase of dilution ratio,the yields of ethylene and the two olefens′yields had increased,the absolute pressure ratio decreased,and the COT had decreased at the same ethane conversion ratio;under the optimal conditions of dilution ratio 0.43 and the COT gradually rising,the ethane conversion could reach 61%,and the ethylene yield could increased from 48.20%to 48.90%.
作者
刘亭亭
陈梦君
才力
毛玲娟
王小瑞
邹子墨
LIU Ting-ting;CHEN Meng-jun;CAI Li;MAO Ling-juan;WANG Xiao-rui;ZOU Zi-mo(Research&Development Center,Zhejiang Petroleum&Chemical Co Ltd,Zhoushan 316000,China)
出处
《石化技术与应用》
CAS
2022年第4期262-265,共4页
Petrochemical Technology & Application
基金
浙江省舟山市科技计划项目(项目编号:2021 C 11004)
浙江石油化工有限公司资助项目(项目编号:ZSH-RD-21-051
ZSH-RD-20-010)。
关键词
乙烯
乙烷
裂解炉
转化率
收率
SPYRO软件
优化
ethylene
ethane
cracking furnace
conversion rate
yield
SPYRO software
optimization
