Energy saving optimization measures of steam and condensation water of sulfur recovery unit in Wanzhou natural gas purification plant

Based on the composition analysis of steam and condensation water of sulfur recovery unit in Wanzhou branch of Chongqing natural gas purification plant, this paper discussed these optimization measures. The steam ejector was redesigned to realize the application of stream cascading and the methods are used to realize the airtight recycling of condensation water such as recovering steam discharged from the condensation tank, recycling condensation water, recovering condensation water at partial pressure and optimizing the type of steam traps. The comprehensive energy consumption can be reduced from 1 303.38 MJ to 1 188.23 MJ per 1×10⁴ m³ containing 1%(mol) of H₂S after optimization. Compared with the design which consumes 2 010 MJ per 1×10⁴ m³ containing 1%(mol) of H₂S, the effect of energy saving is obvious.