关键词:

color:#060607, font-family:-apple-system, blinkmacsystemfont, ", background-color:#FFFFFF, "> 常压塔, 塔顶循环系统, 在线除盐设施, 腐蚀, 氯含量, 水含量, 经济效益

Abstract:

Due to the accumulation of impurities and iron scale caused by under-deposit corrosion at the top of the atmospheric tower (ADT) in a petrochemical company, which blocked the downcomer and led to repeated issues such as increased pressure drop at the end of the operation cycle and difficulty in controlling the final boiling point of naphtha in the atmospheric and vacuum distillation unit. After the online desalination facility for the ADT circulation system was put into use, the operating parameters were consistent with the design values; the corrosion rate was 0.04mm/a, meeting the anti-corrosion requirements; the operation at the top was relatively stable, and the yield of kerosene products in the front line was maintained at a level higher than 9%; the water content in the circulating oil at the outlet of the desalination facility was less than 250μg/g, and the chlorine content was less than 0.2μg/g, both meeting the design requirements; the frequency of leaks in the top air cooler was reduced, the cost of replacing the air cooler was reduced by 2.4 million yuan per cycle, and the direct economic benefit increased by 600,000 yuan/year; it effectively avoided production fluctuations in downstream units caused by corrosion leaks at the top, ensuring smooth production in various units of the joint workshop, with indirect economic benefits far exceeding ten million yuan per year.

Key words:

color:#060607, font-family:-apple-system, blinkmacsystemfont, ", background-color:#FFFFFF, "> atmospheric distillation tower, tower top circulation system, online desalination facility, corrosion, chlorine content, water content, economic benefit