Applied efficiency of pre-lift section in heavy oil riser pipe of catalytic cracking unit
The new type of pre-lift section is added in heavy oil riser pipe in the upgrade and reformation of catalytic cracking unit(Ⅱ)in Luoyang Branch Company based on the practical requirement.The aim of the reformation is to improve the density and velocity distribution of the regenerate catalyst,mix the regenerate and un-regenerate catalysts sufficiently to make the oil mist of raw material and catalyst touch well and increase the ratio of catalyst to oil.The calibration of the unit before and after the reformation is made and the results show that after the reformation,the yield of dry gas reduces,light liquid yield increases, coke reduces,and the catalyst consumption is only about 38%of that before.The effect is obvious.