原位涂层抑制结焦技术在茂名乙烯装置H-115炉的工业应用

Industrial Application of In-Situ Coating Technique for Coke Inhibition to the Furnace H-115 of Maoming Ethylene Plant

裂解炉的结焦问题是制约裂解炉运行周期的重要影响因素,能否有效抑制裂解炉的结焦对裂解炉的经济运行至关重要。原位涂层抑制结焦技术通过在炉管表面原位形成锰铬尖晶石结构的薄膜,屏蔽炉管中引起催化结焦的铁镍元素,从而达到抑制炉管内催化结焦的目的。近年来,原位涂层抑制结焦技术在茂名乙烯装置H-115号炉的工业应用结果表明:该技术可以有效抑制炉管内的催化结焦,不必注入结焦抑制剂,减少了对环境的污染,减少了因投料过程CO波动导致乙烯产品的质量问题;投料量提高了0.8 t/h,运行周期提高了30 d,清焦次数减少了1.24次/a;年创经济效益约为393.38万元,节能增效明显。

The coking problem of cracking furnace is an important factor affecting the furnace operation cycle, and it is crucial for the fur-nace to operate economically whether coking problem can be effectively inhibited or not. In - situ coating technique for coke inhibition can form a thin film with manganese chromium spinel structure on the surface in - situ of the furnace tubes, separating iron and nickel elements, thereby inhibiting catalytic coking in the furnace. In recent years, the results of industrial application of in - situ coating technique to the Furnace H - 115 of Maoming Ethylene Plant, indicate that the technique effectively inhibits catalytic coking in the furnace without pouring into any coking inhibitor, reducing environment pollution and reducing unqualified ethylene products caused by CO fluctuation during feed-ing process. Meanwhile, this technique increases the feeding load by 0.8 ton per hour, improves the operation cycle by 30 days, reduces coke cleaning frequency by 1.24 times per year, and boosts the annual economic benefit by 393.38 million yuan.