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利用前置烧焦罐式高效再生器催化裂化装置动态机理数学模型及其仿真软件平台,考察了原料预热温度对反应再生系统动态和定态特性的影响。在控制汽提段和二密相床藏量的条件下,当同时控制或不控制沉降器压力和反应温度时,反应再生系统是稳定的;否则是不稳定的。在控制再生器压力、沉降器压力和提升管反应器出口温度的条件下,提高原料预热温度,反应深度(以反应热表征)降低,气体、汽油和焦炭产率均下降,但柴油产率下降很少,再生剂含碳量降低。因此,应适当提高反应温度设定值,以改善产品分布。在再生器压力、沉降器压力和提升管出口温度均不被控制时,提高原料预热温度,气体、汽油和焦炭产率及反应深度变化很小。由于再生温度提高较大,再生效果得到改善。
Using the mathematical model of the dynamic mechanism of the pre-scorch pot high efficiency regenerator catalytic cracking unit and its simulation software platform, the influence of the preheating temperature of raw materials on the dynamic and steady state characteristics of the reaction regeneration system was investigated. The reaction regeneration system is stable with or without controlling the settler pressure and reaction temperature while controlling the stripping section and the bimodal bed reserves; otherwise, it is not stable. Under the control of regenerator pressure, settler pressure and riser reactor outlet temperature, the feedstock preheating temperature was increased and the reaction depth (characterized by the heat of reaction) decreased while the gas, gasoline and coke yields decreased while the diesel yield Fewer drops, lower carbon content in regenerant. Therefore, the reaction temperature should be set appropriately to improve product distribution. When the regenerator pressure, settler pressure and riser outlet temperature are not controlled, the preheating temperature of the feedstock is increased, with little change in gas, gasoline and coke yields and reaction depth. As the regeneration temperature is increased, the regeneration effect is improved.