The Meaning of Droplet-Droplet Interaction for the Wet Flue-Gas Cleaning Process

✍ Scribed by R. Kaesemann; H. Fahlenkamp

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 174 KB
• Volume: 25
• Category: Article
• ISSN: 0930-7516
• DOI: 10.1002/1521-4125(20020709)25:7<739::aid-ceat739>3.0.co;2-7

✦ Synopsis

In most large coal-fired power plants an absorption process with a limestone suspension is applied today. The flue gas proceeds upwards through a series of spray headers that introduce a uniform liquid flux of droplets of the limestone suspension. These droplets resist the gas flow and provide a large mass transfer surface area required for the SO 2 removal process. During the spray overlapping the collision of the droplets may lead to a coagulation or a separation process depending on certain collision parameters, such as surface tension, impact velocity and collision geometry. A model for droplet collisions was developed and implemented in a two-phase flow simulation by Euler-Lagrange. The model is based on experimental investigations with overlapping sprays.