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催化裂化提升管反应器数学模型基本上都是基于平推流反应器的假设建立起来的。但是由于其内部流动、传热以及反应过程非常复杂 ,偏离平推流较大 ,所以在模型的实际应用中必须用装置因数去校正 ,表现出较强的经验性。为了改变这种状况 ,本文通过研究分析 ,提出了对催化裂化提升管反应器进行多维微分模拟的研究方法 ,从根本上把反应器结构尺寸 ,物流入口条件 ,流动特征及传热特征等影响考虑进来 ,把流动、传热、传质、裂化反应以及湍流脉动作用全部纳入模型中 ,建立催化裂化提升管反应器的流动反应综合模型。通过对模型的求解 ,可以得到提升管反应器内催化剂颗粒及油气的速度分布、温度分布以及组分分布 ,从而揭示工业提升管反应器内的化学工程信息。这些数据对工业提升管反应器的设计、操作优化及新技术的实施都是十分重要的。
The mathematical models of FCC riser reactors are basically based on the assumption of a flat push-flow reactor. However, due to its internal flow, heat transfer and the reaction process is very complicated, a large deviation from the thrust flow, so the model in the practical application of device factors to be corrected, showing a strong empirical. In order to change this situation, this paper proposed a multidimensional differential simulation method for FCC riser reactor by means of research and analysis, and fundamentally considered the influence of reactor structure size, logistics inlet conditions, flow characteristics and heat transfer characteristics Come in, the flow, heat transfer, mass transfer, cracking reactions and turbulence pulsation all included in the model to establish a catalytic cracking riser reactor flow reaction synthesis model. Through the solution of the model, the velocity distribution, temperature distribution and composition distribution of the catalyst particles and oil-gas in the riser reactor can be obtained, so as to reveal the chemical engineering information in the industrial riser reactor. These data are important for the design, operation optimization, and implementation of new technologies for industrial riser reactors.