分析了浮头式列管换热器的故障现象及产生原因，提出改造方案，并根据改造后的实际情况将脱苯塔和贫富油换热器部分的贫油工艺进行了合理改进。
The reasonable improvement of the lean oil technics in crude benzene tower and heat exchanger of lean and fat oil is introduced according to the practical conditions after reconstruction.
为提高酮苯装置脱油蜡收率，大庆炼化公司于2004年对工艺进行了改进。
The technical modification of ketone-benzol unit to improve the deoiling yield in Daqing Refining and Chemical Company was carried out in 2004.
焦化厂富油脱苯工艺中，管式炉法较蒸汽法节能。
In coking plants, more energy can be saved by tubular furnace process than steam process in the benzene removal from rich oil section.
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