A large amount of water and energy can be recovered in the flue gas after wet desulfurization. In order to explore the performance of the packed tower as a direct contact heat exchanger between flue gas and water, we measured the resistance and temperature field distribution of packed tower through on site pilot scale experiments, filled the gap in previous studies that lacked field trials and high humidity flue gas temperature data. The experimental results show that using packed tower as the heat exchanger can achieve low resistance and high heat exchange efficiency, indicating that packed tower is suitable for cooling the flue gas after wet desulfurization to achieve the purpose of energy and water recovery. The research results can guide the design and operation of the packed tower, liquid to gas ratio of 4.0 L/Nm³ and packing layer thickness of 1.20 m are optimal design parameters for packed tower. The selection of packing type and gas velocity, and the adjustment of operating parameters under variable load conditions can also refer to the experimental data in this article.

湿法脱硫后，烟道气中可以回收大量的水和能量。为了探索填充塔作为烟气与水之间直接接触热交换器的性能，我们通过现场中试规模实验测量了填充塔的阻力和温度场分布，填补了以前缺乏现场试验的研究空白和高湿度烟气温度数据。实验结果表明，采用填料塔作为换热器，阻力小，换热效率高，说明填料塔适合于湿法脱硫后的烟气冷却，达到能量和水回收的目的。研究结果可以指导填料塔的设计和运行，液气比为4.0 L / Nm ³填料塔的最佳设计参数是填料层厚度为1.20 m。填料类型和气体速度的选择以及在可变负载条件下的运行参数的调整也可以参考本文中的实验数据。