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轻汽油醚化装置甲醇回收系统萃取水脱酸技术
Technological transformation of extraction water deacidification in methanol recovery system of light gasoline etherification unit
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- DOI:
- 作者:
- 李 林，陈小龙，孙丽琳，王 瑛
Li Lin，Chen Xiaolong，Sun Lilin，Wang Ying
- 作者单位:
- 中国石油兰州石化公司，甘肃 兰州 730060
PetroChina Lanzhou Petrochemical Company，Lanzhou 730060，China
- 关键词:
- 轻汽油醚化；甲醇回收系统；萃取水；腐蚀；脱酸
light gasoline etherification；methanol recovery system；extract water ；corrosion ；deacidification agent
- 摘要:
- 摘要：某石化公司 50×104 t/a 催化裂化轻汽油醚化装置甲醇回收系统萃取水富集的酸性物质，导致甲醇回收系统设备和管线的腐蚀。为解决该问题，在甲醇萃取塔塔底管线上增设 1台萃取水净化器，萃取水净化器中装填脱酸剂，将萃取水中的酸性物质进行中和，以降低其酸性，实现萃取水的脱酸，减少设备和管线腐蚀。萃取水脱酸技术改造完成投用后，由于萃取水中的酸性物质被脱酸剂中和，萃取水 pH提升至 6.5以上，对降低甲醇回收系统设备和管线的腐蚀起到了积极的作用，实现了装置的长周期安全稳定运行。Abstract: In order to solve the problem of corrosion of equipment and pipelines in methanol recovery system caused by acidsubstances enriched in extraction water of methanol recovery system in a 50×104t/a gasoline etherification unit of a petrochemicalcompany. Through technical transformation, an extraction water purifier is added to the bottom pipeline of the methanol extractiontower, the extraction water purifier is filled with deacidification agent to neutralize the acidic substances in the extraction water, soas to reduce the acidity of the extraction water, realize the deacidification of the extraction water and reduce the corrosion ofequipment and pipeline. After the deacidification technical transformation of extraction water in methanol recovery system of lightgasoline etherification unit was completed and put into use, the pH of extraction water was increased more than 6.5 due to theneutralization of acidic substances in extraction water by deacidification agent, which played a positive role in reducing thecorrosion of equipment and pipelines in methanol recovery system and realize long-term, safe and stable operation of the unit.