先进控制技术在催化裂化装置中的应用

发布时间：2018-11-25 19:43

【摘要】：洛阳石化1.4Mt/a催化裂化装置,原料为加氢蜡油中掺炼30%的减压渣油,由于渣油中硫、重金属和沥青质含量高,造成产品收率和产品质量波动,且设备腐蚀严重,对催化裂化装置平稳操作提出挑战。实施先进控制系统(APC)以后,装置关键被控变量的控制更为平稳,主要操作参数的标准偏差均降低20%以上,减轻了操作人员的工作强度。分馏单元平稳控制得到有效提高,反应-再生单元对分馏单元的冲击和影响平稳过渡,同时确保了稳定汽油和轻柴油的产品合格率。吸收-稳定单元控制优化更加合理,干气中C_3~+组分,液化气中C2-和C5+组分含量均得到有效控制,稳定汽油饱和蒸汽压合格率得到提高;解吸塔底再沸器热源优化,解吸塔底温度稳定性变好,减少1.0MPa蒸汽消耗1.2t/h。高价值产品汽油收率提高,轻油液收达到86.27%,提高2.43个百分点,装置综合能耗下降2.77kg标油/t。
[Abstract]:In the 1.4Mt/a catalytic cracking unit of Luoyang Petrochemical Company, the raw material is 30% vacuum residue mixed with hydrogluten oil. Due to the high content of sulfur, heavy metal and asphaltene in the residue, the product yield and product quality fluctuate, and the equipment is corroded seriously. It is a challenge to the smooth operation of FCC unit. After the implementation of the advanced control system (APC), the control of the key controlled variables of the device is more stable, the standard deviations of the main operating parameters are reduced by more than 20%, and the working intensity of the operators is reduced. The steady control of fractionation unit is improved effectively, the impact of reaction and regeneration unit on fractionation unit is improved and the smooth transition is effected, and the qualified rate of stable gasoline and light diesel oil is ensured at the same time. The control optimization of absorption-stabilization unit is more reasonable. The content of C3- and C5-components in dry gas and liquefied gas are effectively controlled, and the qualified rate of saturated steam pressure of stabilized gasoline is increased. The desorption column bottom reboiler heat source is optimized, the desorption tower bottom temperature stability is improved, and the 1.0MPa steam consumption is reduced by 1.2 t / h. The gasoline yield of high value product is increased, the light oil is up to 86.27 percent, which is increased by 2.43 percent, and the comprehensive energy consumption of the unit is reduced by 2.77kg standard oil / t.
【作者单位】：中国石化洛阳分公司;
【分类号】：TE96

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