移动床甲醇制丙烯技术的工艺与工程

doi:10.3969/j.issn.0438-1157.2014.01.001

化工学报 ›› 2014, Vol. 65 ›› Issue (1): 2-11.DOI: 10.3969/j.issn.0438-1157.2014.01.001

移动床甲醇制丙烯技术的工艺与工程

严丽霞, 蒋云涛, 蒋斌波, 廖祖维, 黄正梁, 王靖岱, 阳永荣, 汪燮卿

化学工程联合国家重点实验室, 浙江大学化学工程与生物工程学系, 浙江杭州 310027

收稿日期:2013-09-26 修回日期:2013-11-08 出版日期:2014-01-05 发布日期:2014-01-05
通讯作者: 阳永荣
作者简介:严丽霞（1987-），女，博士研究生
基金资助:
国家高技术研究发展计划项目（2012AA030304）。

Methanol to propylene process using moving bed technology and its engineering study

YAN Lixia, JIANG Yuntao, JIANG Binbo, LIAO Zuwei, HUANG Zhengliang, WANG Jingdai, YANG Yongrong, WANG Xieqing

State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2013-09-26 Revised:2013-11-08 Online:2014-01-05 Published:2014-01-05
Supported by:
supported by the National High Technology Research and Development Program of China(2012AA030304).

摘要/Abstract

摘要： 提出了一种新型的移动床甲醇制丙烯工艺（MMTP）并进行工程化分析。首先，根据反应器必须与催化剂的反应失活速率相匹配的原则，认为移动床是与失活速率处于中等水平的ZSM-5催化剂相匹配的最佳反应器。因此，MMTP工艺在充分发挥ZSM-5催化剂多产丙烯优势的基础上，结合移动床的中等循环速率进行反应-再生，从而实现催化剂高产丙烯的连续化与稳定化；其次，针对MTP反应的强放热特点，对比了流化床工艺的一步法操作与固定床工艺的两步法操作，发现MMTP工艺采用两步法操作既能合理地分配反应热，又能灵活地调控产品分布；最后，通过换热网络的优化设计与醇油共炼的工艺集成，使得MMTP工艺在节水节能的同时仍具有高丙烯收率。目前，在现有的MMTP工艺技术基础上，已经完成1万吨丙烯/年的工艺包设计，技术和经济的竞争优势十分明显，市场推广应用前景广阔。

关键词: 甲醇制丙烯, 移动床, 醇油共炼, 两步法, 失活, 优化

Abstract: A novel moving bed process for methanol to propylene (MMTP), and conducts engineering analysis for this process were presented. Firstly, according to the principle that the reactor must be matched with reaction catalyst deactivation, the most matching reactor for ZSM-5 catalysts (with mid-level deactivation) is moving bed. Moreover, the MMTP process can not only exert higher propylene selectivity of the catalyst, but also can utilize medium particle circulation rate for reaction and regeneration to serialize and stabilize high yield of propylene process. Secondly, regarding the strong exothermal characteristics of the MMTP reaction, two kinds of processes, fluidized bed one-step operation and fixed bed two-step operation, are compared. Based on the comparison results, it is concluded that the two-step operation of MMTP process can allocate reasonable reaction heat and control product distribution with flexibility. Finally, through integration of heat-exchange network optimization and alcohol-oil refining process, MMTP process owns high propylene yield on the basis of water and energy saving. On the basis of current MMTP process, 10000 t·a^-1 propylene technology package design has been completed. In summary, MMTP owns visible competitive advantages both on technique and economics, which has high application potential in industry.

Key words: methanol to propylene, moving bed, alcohol and oil refining, two-step route, deactivation, optimization

中图分类号:

TQ028.8

严丽霞, 蒋云涛, 蒋斌波, 廖祖维, 黄正梁, 王靖岱, 阳永荣, 汪燮卿. 移动床甲醇制丙烯技术的工艺与工程[J]. 化工学报, 2014, 65(1): 2-11.

YAN Lixia, JIANG Yuntao, JIANG Binbo, LIAO Zuwei, HUANG Zhengliang, WANG Jingdai, YANG Yongrong, WANG Xieqing. Methanol to propylene process using moving bed technology and its engineering study[J]. CIESC Journal, 2014, 65(1): 2-11.

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移动床甲醇制丙烯技术的工艺与工程

Methanol to propylene process using moving bed technology and its engineering study

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