延迟焦化装置加工催化裂化油浆的新技术及其工业应用

开发了一种催化裂化油浆（简称催化油浆）单独加热、炉后混炼新技术，并在中海油惠州石化4.20Mt/a延迟焦化装置上工业应用。该技术设置一台单独的加热炉用来加热催化油浆，可有效避免油浆对焦化装置产生不利影响。采取针对性特殊设计后，油浆加工系统可以实现长周期运行。应用该技术加工催化油浆后，焦化蜡油收率增大0.98百分点，焦炭收率增大2.10百分点，汽柴油收率减小3.09百分点；焦化产品中干气、液化气、汽油和柴油性质变化不大，焦化蜡油变重，焦炭灰分升高，但不影响下游装置运行和产品外售。应用该技术加工催化油浆，相比于将油浆作为燃料油外售，每年可增加效益10120万元。该技术具有较高的操作灵活性，可根据需求掺炼其他物料，也可提高加热炉的出口温度、加大焦炭塔内渣油反应深度，从而获取更高的经济效益。

NEW TECHNOLOGY FOR FCC SLURRY PROCESSING IN DELAYED COKING UNIT AND ITS INDUSTRIAL APPLICATION

A new technology for FCC slurry processing with separate heating and post-furnace mixing steps was developed and applied in the 4.20 Mt/a delayed coking unit of CNOOC Huizhou Petrochemical Company. A separate heating furnace was set up to heat the slurry to effectively avoid the adverse effect of the slurry on the delayed coking unit. After adopting specific designs，the slurry processing system can steadily run for a long period. The yield of coker gas oil increased by 0.98 percentage points，the yield of coke increased by 2.10 percentage points，and the yield of gasoline and diesel decreased by 3.09 percentage points. The properties of dry gas, LPG，gasoline and diesel had little changed, while the properties of coker gas oil became heavier, and the ash content in coke increased, but it did not affect the operation of downstream units and the sale of products. Compared with selling slurry as fuel oil, the new processing method can increase profit by 101.2 million Yuan per year. This technology has high operation flexibility, which can mix other materials according to the demand, increase the outlet temperature of the heating furnace, and increase the reaction depth of residue in the coke tower, thus obtaining higher economic benefits.