DSI for SO3/SO2/HCl Removal
Integrated with Proprietary Kinetic Chemistry Submodels
RAS has significant modeling experience and strong capability in design and optimization of Dry Sorbent Injection (DSI) and Activated Carbon Injection (ACI) technology for pollutants removal from flue gas. In addition to Conventional CFD flow modeling, we have incorporated a number of our in-house proprietary sorbent chemistry sub-models, including:
Hydrated lime + SO3
Hydrated lime + HCl/SO2
Trona/SBC + HCl/SO2
Trona/SBC + SO3
Activated carbon + Hg/HgCl2
CFD predictions of SO3 concentration and reduction percentage for a DSI system on a 450-MWe unit flue gas duct for 3 Cases with different injection lances.
CFD predictions of trona sorbent concentration (left), SO2 concentration (middle) and HCl concentration on a 370-MWe unit flue gas duct using chemistry submodels.
The following table summarizes the advantages of chemistry-based Advanced CFD modeling versus flow-only (or non-chemistry) Conventional CFD modeling, in terms of CFD outlet and evaluation capabilities. Advanced CFD model provides “real-life” predictions, including not only the mixing and flow related output that a conventional CFD can provide, but also gas species concentration and reduction predictions. The advanced CFD model approach provides a very comprehensive and useful tool for evaluating a number of important design/operating parameters as well as sorbent properties.