Abstract:

To achieve high value-added utilization of FCC slurry oil, it is particularly crucial to choose high efficient and low consumption slurry oil solid particle removal technology. Based on the long-term application of slurry oil low-temperature solid particle removal technology in FCC unit, it is proved that the technology has strong adaptability to feedstocks, with a solid content of no more than 50 g/L, a gum mass fraction of no more than 15%, an asphaltene mass fraction of no more than 10%, and the solid content of the desolidified slurry oil remains stable less than 100 μg/g for a long term, which meets the requirements of needle coke feedstocks; the operating temperature is 160～180 ℃, which is relatively low, with low fuel consumption and low operating cost; the yield of purified slurry oil is as high as 99%, without producing backwash oil or concentrated slurry oil; solid and liquid slurry oil are completely separated, and the powdery filter residue is basically oil-free; the equipment occupies a small area, has few supporting public works, is easy to operate, and has low operating pressure, with a high safety factor in production and operation. It can achieve long-term continuous production of the unit, meeting the requirements of reducing costs and increasing efficiency.

Key words: FCC unit, slurry oil, low-temperature solid particle removal, solid particle content, needle coke, skid-mounted equipment

摘要：

要实现催化裂化油浆高附加值利用，选择高效、低耗的油浆脱固技术尤为关键。对目前常用的催化裂化装置油浆脱固技术长期应用效果进行考察，结果表明：低温脱固技术原料适应性强，要求固含量不高于50 g/L,胶质质量分数不高于15%,沥青质质量分数不高于10%;脱固油浆固含量长期稳定在100μg/g以内，满足针状焦原料的要求；操作温度在160～180℃,相对较低，燃料消耗少，运行成本低；净化油浆收率高达99%,不产生反冲洗油或浓缩油浆；可实现固体与液态油浆彻底分离，排出粉状滤渣基本不含油，可作为一般固废处理；设备占地面积小，配套公用工程少，操作简单，均在常压或微负压下操作，生产运行安全系数高；可实现装置长周期连续生产，符合企业降本增效的发展需求。

关键词: 催化裂化装置, 油浆, 低温脱固, 固含量, 针状焦, 撬装设备