双入口脱硫吸收塔的结构优化流场模拟研究

Structural optimization of the flow field simulation study of the double-inlet desulfurization absorption tower

双入口吸收塔通常采用两进一出方案,当单侧引风机停运时,烟气从停运侧入口逸出。在实际运行中,在吸收塔入口处增加气流隔板避免此类情况发生。通过计算流体动力学(CFD)数值模拟方法,分析不同形状、不同尺寸之间隔板的较优型式。结果表明,通过对比不同形式的隔板,三角隔板能够引导脱硫塔内气流分布,气流的均匀性相对较好,因此建议采用三角隔板。针对三角隔板,分析不同隔板角度、隔板宽度、隔板长度对气流均匀度的影响,角度30°、宽度5 m、长度12 m的三角隔板能够让脱硫塔内部气流更加均匀。

When the unilateral induced draft fan is out of operation,the flue gas will escape from the inlet of the decommissioning side,and in the actual operation,the airflow partition is added at the inlet of the absorption tower to avoid such a situation.Through the CFD numerical simulation method,the optimal type of separator between different shapes and sizes was analyzed.The results show that by comparing different forms of separators,the triangular separator can guide the airflow distribution in the desulfurization tower,and the uniformity of the airflow is relatively good,so the triangular diaphragm is recommended.For the triangular diaphragm,the influence of different separator angles,diaphragm widths and separator lengths on the uniformity of airflow was analyzed,and the triangular diaphragm with an angle of 30°,a width of 5 m and a length of 12 m could make the internal airflow of the desulfurization tower more uniform.