Abstract: In order to further solve the usage problem of catalytic cracking(FCC) slurry, the test of high-proportion blending of FCC slurry was carried out in the delayed coking unit of PetroChina Yunnan Petrochemical Company. The results showed that when the blending ratio of FCC slurry increased from 25% to 29%, the yield of petroleum coke decreased significantly, the yield of gas oil increased, and the yield of light oil and total liquid increased. The volatile matter and ash content of petroleum coke increased by 1.9 percentage points and 0.04 percentage point, respectively, and the sulfur content of petroleum coke decreased by 0.1 percentage point. The petroleum coke before and after high proportion blending could meet the 4A grade of enterprise standard. At the same time, it was found that the high proportion blending only accelerated the corrosion of the feed pump pipeline of the furnace, and had little effect on the process operation conditions of the coker. The economic benefit of processing per ton of raw materials was increased by 67.0 Yuan, indicating that it was feasible to blend FCC slurry with high proportion under the optimized scheme.

Key words: delayed coking, FCC slurry, vacuum residue, blending