AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Development of a Dilutor for Flue Gas Aerosol Sampling under High Water Vapor and High Temperature Conditions
JIANGUO DENG, Yueyun Fu, Jingkun Jiang, Tsinghua University
Abstract Number: 255 Working Group: Instrumentation and Methods
Abstract High water vapor are often encountered when sampling aerosols from flue gas after the desulfurization unit. During the sampling, water vapor may condense onto particle surface and change the size distribution which leads to inaccurate measurement. High temperature sampling after the selective catalytic reduction unit is another challenge. An on-site dilutor was developed to address these challenges. A vacuum layer was used for insulation. Using computational fluid dynamics simulation, we tested the mixing of dilution gas with sampled flue gas. Evaporation of large droplet was theoretically estimated and experimentally evaluated using laboratory generated aerosol. The performance of the dilutor was tested in a power plant flue gas system. It was found that the dilutor was effective in sampling aerosol from the wet flue gas and has low particle loss rate. The vacuum layer kept the dilutor at low temperature which simulates the release and mixing of flue gas in the ambient environment.