撞击法测试液滴研究及在湿法脱硫系统的应用

湿法脱硫系统除雾器运行优劣，关系到燃煤电厂烟气排放水平，需采用合适的分析方法对脱硫烟气中携带液滴的情况进行分析。使用撞击法（Impacting method）在工业试验装置上研究了湿法脱硫烟气中携带液滴的分布规律，介绍撞击法的采样原理、使用方法、数据分析与处理，并给出应用实例及撞击法在测试过程中的注意事项。研究结果表明，通过显微镜可观察并统计气流携带的液滴在撞击板上留下的印记（弹坑），根据其直径和数量可得出液滴粒径的分布，同时可以计算得到烟气中液滴的质量浓度，所得结果可为除雾器系统运行规律的研究和优化改造提供数据支持。

Research and Application of Impacting Method for Liquid Droplet Testing in Wet Flue Gas Desulfurization System

The performance of mist eliminator in wet desulfurization system is critical to the flue gas emission level of coal-fired power plants. Appropriate analysis method should be adopted to analyze the liquid droplets carried in the flue gas of desulfurization. In this paper the impacting method was used to study the droplet size distribution in flue gas of wet desulfurization. The sampling principle, operation manual, data analysis and processing of impact method are introduced. The application examples and precautions in the testing process of impact method are also put forward. The results show that by using the microscope to observe and count the imprints of droplets carried by flue gas on the impact plate, the distribution of droplet size can be obtained according to the diameter and number of the imprint. At the same time, the mass concentration of droplets in flue gas can be calculated as well. Hence corresponding data support is provided from the derived calculation result for the research and optimization of the operation of the demister.