裂解原料中氧化物对乙烯装置的影响

INFLUENCE OF OXIDE IN CRACKING RAW MATERIALS ON ETHYLENE PLANT

对山东某石化乙烯装置裂解原料氧化物超标对装置的影响进行深入分析。裂解原料氧化物超标在裂解炉高温条件下生产甲醇、有机酸、一氧化碳、二氧化碳以及其他氧化物,以上杂质的存在严重影响到碳二加氢反应器稳定操作,造成急冷水及裂解气压缩机段间凝液pH值偏低,设备腐蚀加剧和急冷水乳化,缩短炉管的使用寿命,丙烯产品不合格,碱性塔黄油生产量变大,干燥器分子筛吸附能力变差,污染裂解汽油进而影响碳四和碳五产品质量等。

The influence of excessive oxide in cracking raw materials on the ethylene plant at a petrochemical company in Shandong is analyzed in detail.The excessive oxide in cracking raw materials produces methanol,organic acid,carbon monoxide,carbon dioxide and other oxides at high temperature in cracking furnace.These impurities seriously affect the stable operation of C 2 hydrogenation reactor,resulting in the low pH value of quench water and condensate between sections of cracking gas compressor,increased equipment corrosion and quench water emulsification,shorter service life of furnace tube,off-spec propylene product,increased grease production in caustic tower,poor adsorption capacity of molecular sieve of dryer and the pollution of pyrolysis gasoline,thus affecting the quality of C 4 and C 5 products.