蜡油催化裂化装置节能技术改造

Energy saving technical reconstruction of wax oil catalytic cracking unit

在催化剂性质不变的前提下,对1000 t/a蜡油催化装置进行了外取热器本体、取热形式、余热炉蒸发段、分馏塔塔底油浆蒸汽发生器和解吸塔底热源改造,同时对原料油、油浆喷嘴进行了更换。改造后,提高了装置处理量、掺渣比;增加了油浆蒸汽发生器、外取热器、余热锅炉产汽量;实现了烟机持续发电;停止用蒸汽作为解吸塔热源。CS进料喷嘴的使用和剂油比的增加有利于产品分布,提高了目的产品的选择性和装置运行的经济效益。

With the same catalyst, the external heater body and its heat transfer style, the evaporation zone of heat recovering furnace,the slurry oil vapour generator in the bottom of fractionating tower,and the heat source in the bottom of desorber are reformed in wax oil FCC unit with treatment capacity of 1.0 Mt/a. The crude oil nozzle and slurry oil nozzle are replaced. After reform, the treatment capability and the proportion of refining residue are increased. The amount of vapour of the slurry oil vapour generator, external heater, heat recovering furnace are enhanced. The extractor could generate electricity continuously. The vapour as heat resource of desorber is stopped. The application of CS feed nozzle and the added ratio of catalyst to crude oil are good to product distribution. The selectivity of aim products is increased, and the operation economic benefit is improved.