文献类型：期刊文献

英文题名：Pilot Test for the Purification and Utilisation of Process Water in Ethane Steam Cracking for Ethylene Production

作者：Liu, Qilong[1]; Li, Haijun[2]; Zhu, Huatong[1]; Feng, Silong[1]; Yang, Qiang[1]; Lu, Hao[1]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Ningbo Huatai Wealthy Polymer Material Limited, Zhejiang, Ningbo, 315812, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220452121)

语种：英文

外文关键词：Effluents - Energy utilization - Ethane - Purification - Sewage - Steam - Steam cracking - Wastewater treatment - Water recycling

摘要：Plants producing ethylene from ethane steam cracking produce a large amount of effluents comprising oil and suspension, which can lead to heat exchanger blockage and steam regeneration. The realisation of efficient process water treatment and recycling is one of the keys to the smooth operation of the plant. The traditional multi-stage tandem water treatment process has several issues such as long flow, easy blockage of the flow path by coke powder particles, and incomplete oil–water separation. In view of the problems of the existing water treatment process, this study proposed an integrated water purification process combining medium particle extractor (MPE) and combined fibrous coalescer (CFC) technology. Based on laboratory tests and subsequent analyses, a pilot test was designed and conducted; a long-term stable operation could be maintained at the flow rate of 1.6 m3/h. The results of the pilot test demonstrated that the process could reduce the average oil content from 606 mg/L to 18.4 mg/L and turbidity from 1213 NTU to 7.9 NTU, with an average separation efficiency of 96.96% and 99.35% respectively. The separation effect of this process was determined to be a better option when compared with that achieved by the current commercial wastewater treatment process. Additionally, the equipment cost and operation energy consumption were observed to be reduced by 64% and 92.5% respectively, providing a novel idea for green and efficient treatment and recycling of process water. ? 2022, The Authors. All rights reserved.