关键词: 制氢转化炉, 满负荷, 瓶颈, 流段压力降, 烟气量, 空气预热器, 蒸汽过热器

Abstract:

A 60 dam³/h hydrogen production reformer in an oil refinery has undergone technical transformation during the overhaul in 2017, replacing the heat pipe air preheater in the low temperature section of the convection section with a cast iron plate air preheater, and replacing the plate air preheater in the high temperature section with a low-pressure falling plate air preheater.Since the start up of the hydrogen production unit in January 2018, the two pressure measuring points on the top of the hydrogen production furnace have gradually presented an intermittent micro-positive pressure state with the increase of operating load, exceeding the control index(-90～-20 Pa). Through research and analysis, the design input condition(2.08% oxygen volume fraction) deviates from the actual operation condition(5.6% oxygen volume fraction), resulting in the large design pressure drop of the air preheater in the low temperature section, which restricts the increase of the load of the hydrogen production converter, which is the main reason for the bottleneck of hydrogen production reformer operating at full load.

Key words: hydrogen production reformer, full load, bottleneck, flow section pressure drop, exhaust gas volume, air preheater, vapour superheater