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[1]于泳,宋艳红,陶全保,等.甲醇制烯烃装置脱甲烷和丙烯回收控制的模拟优化[J].石化技术与应用,2022,6:416-422.
　YU Yong,SONG Yan-hong,TAO Quan-bao,et al.Simulation and optimization of demethanization and propylene recovery control in methanol to olefins unit[J].Petrochemical technology & application,2022,6:416-422.
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甲醇制烯烃装置脱甲烷和丙烯回收控制的模拟优化(PDF)

《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]

期数:
2022年6期
页码:
416-422
栏目:
出版日期:
2022-11-10

文章信息/Info

Title:
Simulation and optimization of demethanization and propylene recovery control in methanol to olefins unit
文章编号:
1009-0045（2022）06-0416-07
作者:
于泳1; 宋艳红1; 陶全保1; 汪泽强1; 费建国1; 刘桂莲2*
1.中安联合煤化有限责任公司，安徽 淮南 232092； 2. 西安交通大学 化学工程与技术学院，陕西 西安 710049
Author(s):
YU Yong1;  SONG Yan-hong1;  TAO Quan-bao1;  WANG Ze-qiang1;  FEI Jian-guo1;  LIU Gui-lian2
1. Zhong′an United Coal Chemical Co Ltd， Huainan 232092，China； 2. School of Chemical Engineering and Technology，Xi′an Jiaotong University， Xi′an 710049，China
关键词:
甲醇制烯烃; 脱甲烷塔; 丙烯回收单元; 节能降耗; 模拟优化
Keywords:
methanol to olefin;  demethanizer;  propylene recovery unit;  energy saving and consumption reduction;  simulation and optimization
分类号:
TQ 021.8
DOI:
DOI：10.19909/j.cnki.ISSN1009-0045.2022.06.0416
文献标识码:
B
摘要:
针对某公司180万t/a（以甲醇进料计）甲醇制烯烃（MTO）装置运行中能耗高的问题，用Aspen Plus软件对该装置的脱甲烷塔（T 202）和丙烯回收单元进行了模拟和灵敏度分析，确定了简单可行的优化改造方案。结果表明：T 202、丙烯回收单元精馏塔（T 205）的灵敏板分别为第9，第85块塔板，其灵敏板的运行参数与相应产品控制组分变化呈现一一对应关系，均可反映并指导相应塔釜及其产品质量的操控；用流经冷却器（E 201）的碳四洗液加热T 202的进料至0 ℃，不仅可使其乙烯产品满足质量分数不小于99.95%的质量控制要求，而且可降低再沸器和冷凝器的能耗，节省丙烯冷却剂费用402.6万元/a；当T 205和T 206丙烯回收单元两精馏塔的操控压力分别降至1.674，1.600 MPa时，不仅T 206的回流比可降为12.3，并可将T 205塔底丙烷产品中含丙烯质量分数降至0.2%，减少丙烯损失量约为70 kg/h，同时相应减少冷凝器循环水、再沸器急冷水的消耗量分别为62.9，18.9 t/h。
Abstract:
Aiming at the problem of high energy consumption in the operation of the methanol-to-olefin （MTO） unit with the processing capacity of 1.8 Mt/a（basing on methanol feed）， Aspen Plus software was used to simulate and analyze the sensitivity of the demethanizer（T 202） and the propylene recovery unit， and a simple and feasible optimization scheme was worked out. The results showed that： the sensitive plate of T 202 and the rectification tower（T 205） of propylene recovery unit was the 9th， 85th plate， respectively， and the operation parameters of the sensitive plate were in one-to-one correspondence with the changes of the control components of the corresponding target products， which could reflect and guide the operation of T 202， T 205 and the relevant product quality control. It not only made its ethylene product meet the quality control requirements（mass fraction not less than 99.95%） by heating T 202 feed to 0 ℃ with the C4 washing liquid flowing through the cooler E 201， but also reduced the energy consumption of reboiler and condenser， saving the cost of propylene coolant of 4.026 million Yuan/a. When the control pressure of both rectifying columns T 205 and T 206 of the propylene recovery unit was reduced to 1.674，1.600 MPa， respectively， not only the reflux ratio of T 206 decreased to 12.3， but also the mass fraction of propylene in the bottom propane product of T 205 could be reduced to 0.2%， and the loss of propylene can be reduced by about 70 kg/h， meanwhile， the consumptions of the circulating water for condenser and the quench water for reboiler could be reduced by 62.9， 18.9 t/h， respectively.

参考文献/References

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备注/Memo

备注/Memo:
国家自然科学基金资助项目（项目编号：22078259）
更新日期/Last Update: 2022-11-10