The main problems of the petrol fractionating column are coke breeze carrying, vapour plase polymerization and the dirt storage and antiblock ability of the packing and gas - liquid distributor.

• 汽油分馏塔改造中的主要难题是焦化物夹带、气相聚合、填料和气液分布器的贮垢抗堵能力等。