带余热回收的船用脱硫塔喷淋过程优化及数值模拟

Optimization and Numerical Simulation of Spray Process of Marine Desulfurization Tower with Waste Heat Recovery

为提高船用脱硫塔的脱硫效果,基于带余热回收的新型脱硫塔模型,将第1层喷淋层置换为喷雾层,以改善其喷淋条件。在此基础上,基于欧拉-拉格朗日模型和双膜理论建立脱硫塔仿真模型;针对典型工况,利用FLUENT软件模拟计算塔内流场参数和SO_(2)吸收状况。对喷淋角度、喷淋层间距、喷淋温度和喷雾层位置等设计参数进行优化计算,结果表明:该脱硫塔的最佳喷淋角度为170°;喷淋层的最佳间距为2.5 m;喷淋的最佳温度为300 K;喷雾层的最佳位置为第1层。综合最佳喷淋参数,该脱硫塔的脱硫效率为96.32%。

In order to improve the desulfurization effect of the marine desulfurization tower,based on the new desulfurization tower model with waste heat recovery,the first spray layer is replaced with a spray layer to improve its spray conditions.Based on the Euler-Lagrangian model and the double membrane theory,a simulation model of the desulfurization tower is established,and FLUENT is used to simulate and calculate the flow field and SO_(2) absorption in the tower.Simulation calculations under various parameters are carried out for the spray angle,spray layer spacing,spray temperature and spray layer position.The results show that,the best spray angle of this desulfurization tower is 170°,the best spray interval is 2.5 m,and the best spray temperature is 300 K,the best position of the spray layer is the first layer.Based on the best spray parameters,the desulfurization efficiency of the desulfurization tower is 96.32%.