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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 DSI chemistry model to predict SO3 reduction by sorbent

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 to predict DSI sorbent distribution
CFD to predict DSI SO2 concentration by sorbent
CFD to predict DSI HCl concentration by sorbent

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.

comparison of benifits of DSI sorbent chemistry model with no chemistry model
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