逆流连续重整工艺烧焦过程的数值计算与分析

建立了逆流连续重整装置再生烧焦区的动态数学模型，并利用Matlab编程数值计算方法求解了该数学模型，选取3种不同操作条件，利用该模型计算了烧焦区内各个位置的焦炭质量比、再生气氧含量、床层温度、气相温度，深入分析研究了初始积炭量、催化剂循环速率对烧焦的影响。结果表明：烧焦反应速率随着催化剂积炭量、再生气氧含量和反应温度的升高而增大；随着初始积炭量增加，床层局部最高温度位置向外筛网方向迁移；随着催化剂循环速率增加，床层局部最高温度位置向下部迁移。模型计算结果与装置实际测量结果具有较高的一致性，说明所建模型的计算方法具有良好的准确性。

NUMERICAL CALCULATION AND ANALYSIS FOR COKE BURNING OF COUNTER-CURRENT CONTINUOUS CATALYTIC REFORMING PROCESS

The dynamic mathematical models of coke burning zone were established, and the mathematical model was solved by using Matlab programming numerical calculation method. Three different operation conditions were selected, and the coke mass ratio, oxygen content of regeneration gas, bed temperature and gas phase temperature were calculated. The influence of initial coke deposit amount or catalyst circulation rate on regeneration was studied. The results show that the coke burning rate increases with the increase of coke deposit amount, oxygen content in regenerated gas and reaction temperature, and the location of the highest temperature in the local bed moves to the direction of the outer screen with increase of initial coke deposit amount. With the increase of the catalyst cycle rate, the local highest temperature position of the bed moves downwards. The calculated results of the model were in good agreement with the measured results, which showed that the calculation method of the model had good accuracy.