煤-天然气双原料制甲醇小比例CO变换工艺研究  

Study on small-scale CO conversion process for methanol production from coal and natural gas dual raw material

作　　者：申有才 Shen Youcai(Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi′an Shaanxi 710065,China)

机构地区：[1]陕西延长石油集团有限责任公司,陕西西安710065

出　　处：《煤化工》2024年第6期9-12,29,共5页Coal Chemical Industry

摘　　要：靖边项目采用煤-天然气双原料生产甲醇,相比单一原料煤制甲醇,CO变换制氢较为关键,需打破常规设计开展方案研究。在分析CO变换机理的基础上,研究对比了绝热变换、等温变换及两种工艺组合等变换流程的优缺点;根据双原料制合成气多种工况的运行特点,确定了变换工艺流程和装置规模。结果表明,采用一段绝热变换工艺,变换装置规模按常规设计进气量的115%设计,同时富产1.0 MPa(G)过热蒸汽的方案,符合实际生产中多工况运行和全厂蒸汽平衡要求,且方案流程短、易操作,投资低、能耗小,可用于项目工程设计。Both coal and natural gas were used as raw materials to produce methanol in the Jingbian Project.Compared to methanol produced from a single raw material of coal,the hydrogen production through CO shift conversion was more crucial,requiring the development of a scheme study that broke away from the conventional design.Based on the analysis of the CO shift mechanism,the advantages and disadvantages of adiabatic shift,isothermal shift and combined processes of the two were studied and compared.According to the operational characteristics of various working conditions for producing syngas from dual raw materials,the shift process flow and plant scale were determined.The results showed that the scheme of adopting one-stage adiabatic shift process,designing the shift plant scale at 115%of the conventional designed gas intake volume,and simultaneously producing 1.0 MPa(G)superheated steam conformed to the requirements of multi-condition operation in practical production and steam balance across the entire plant.Furthermore,this scheme featured a short process flow,ease of operation,low investment and low energy consumption,making it suitable for project engineering design.

关 键 词：水煤浆气化 天然气转化 碳氢互补 CO变换 多工况 

分 类 号：TQ223.121[化学工程—有机化工]