天然气蒸汽转化制甲醇装置扩能改造设计方案探讨

Discussion on Design Scheme for Revamping and Expanding Methanol Plant Based on Reformation of Natural Gas with Steam

介绍了天然气蒸汽转化制甲醇装置增设纯氧转化炉,产能以33万t/a扩大到46万t/a的改造方案。论述了天然气转化制合成气的转化原理、工艺过程和二段转化炉的自热转化特点;比较了国外合成氨装置改产甲醇的一段转化和二段转化方案;从填平补齐项目的设计方案、生产能力的平衡、技术经济分析等方面论述了扩能改造的可行性。分析结果表明,改造后2年即可回收全部投资。

Author has introduced the reformation scheme for the methanol plant in which the methanol is made by natural gas reformation using steam,and a pure oxygen reformer is added,then the production capacity of methanol is increased from 330 000 t/a to 460 000 t/a;discussed the reformation principle to make synthesis gas,by reforming the natural gas,the process flow and the self-heating reformation feature for the two stages of reformer;compared the scheme with one stage and two stages reformations used in the fo...