基于传质传热模型的废轮胎裂解塔设计优化（Ⅱ）优化设计

以达到最大有效传热面积和传热系数为优化目标，利用已建立的多层圆盘结构废轮胎裂解塔的传质传热模型，给出了刮扫面积重叠率、主轴转速、耙杆安装系数、耙叶数目间距及安装角度等裂解塔主要参数的优化设计方法.结果表明，刮扫面积重叠率ξ在区间(0, ξ_c)为宜;主轴转速ω应在保证最终产品质量达标的前提下，选取较高值;裂解塔设计中应尽量采用多耙杆系统;耙叶间距的更优设计方案是使各料环对应临界处理量相等;耙叶安装角度一般取为45°，此时耙叶所受阻力最小，对料环搅拌效果最佳.

Optimal designing of cracking tower for waste tires based on heat and mass transfer model (Ⅱ) Optimal designing

In order to achieve maximum effective heat transfer area and heat transfer coefficient, some important parameters of a new cracking tower with multiple hollow disks were optimized on the basis of heat-mass transfer model developed in Part（Ⅰ）, including the area overlapping ratio, rotating speed of axis, plow-setting coefficient, number and setting angle of plows, distance between plows.It was shown that the area-overlapping ratio was better in the interval of 0 to ξ_c.A higher rotating speed of axis was preferred provided that the quality of pyrolysis products was not affected.Multiple plows system was recommended in the design of a new cracking tower for waste tires.The distance between plows was optimal when the critical capacity values of all annular granular heaps were equal.The setting angle of 45° was helpful to decrease the drag force acting on plow and enhance mixing of granular heaps.