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长庆石化公司140×10~4t/a催化裂化装置于2005年8月一次试车投用成功,运行8年多来总体运行平稳。装置反应—再生系统均为高温环境,装置运行时设备内部温度高达660~700℃,且开工前后温差极大。为吸收设备热变形及温差应力,装置内多处使用金属膨胀节,特别是高温烟气管道中,膨胀节更是不可或缺。随着装置掺炼渣油比例增大,由此引发的高温烟气腐蚀问题,尤其是烟气的露点腐蚀在某些
Changqing Petrochemical Company 140 × 10 ~ 4t / a catalytic cracking unit in August 2005 a test run put into operation, running more than 8 years overall operation stable. Device reaction - regeneration system are high temperature environment, the device operating temperature of the device as high as 660 ~ 700 ℃, and the great temperature difference before and after the start. In order to absorb the thermal deformation of equipment and temperature stress, the device uses multiple metal expansion joints, especially in high-temperature flue gas pipe, expansion joint is even more indispensable. As the proportion of plant-blended residual oil increases, the resulting high temperature flue gas corrosion problems, especially the dew point corrosion of the flue gas,