关键词: 烃类蒸汽转化, 制氢装置, 高温变换, 中温变换, 开工还原, 工程投资, 能耗, 操作费用

Abstract:

Two schemes are designed based on the raw gas of a certain refinery, and comparisons are made in terms of engineering investment, energy consumption, and operating costs. Scheme 1 is steam reforming + high temperature shift, while Scheme 2 is steam reforming + medium temperature shift. The results show that in the case of abundant land area, sufficient engineering investment, and shortage of project steam, Scheme 2 has higher CO conversion rate, lower raw material consumption, more steam output, lower energy consumption, and lower operating costs. At this time, Scheme 2 has more advantages. In the case of tight project land area, limited engineering investment, and abundant project steam, Scheme 2 needs to consider an independent medium temperature shift start-up reduction process and equipment. The start-up process is complex, the catalyst cost is high, and the land occupation area increases accordingly. However, Scheme 1 has lower engineering investment and small land occupation area, which makes Scheme 1 more advantageous.

Key words: hydrocarbon steam reforming, hydrogen production unit, high temperature shift, medium temperature shift, start-up reduction, project investment, energy consumption, operating cost