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Babcock Power uses CFD simulation for LPA screen design

The efficient operation of SCR units requires good ash removal systems in place to deal with large particle ash. A CFD flow simulation study like the one described in this paper can confirm that hopper design, screen choice and placement are appropriate and optimum. Through CFD simulation, we have ensured that the velocity in the economizer outlet, hopper and LPA screen region are kept as low as possible and that the chosen outlet and hopper design produces a high aerodynamic capture rate for the popcorn ash particles. For the utility boiler considered here the screen is made up of panels and based on the flow simulation results the screen panels near the top experience high velocity flue gas flow and more prone to erosion. A different material choice for these sections of the screen will ensure the screen has adequate life.

Revision Date:  8/22/2019

Tags:  221118 - Other Electric Power , Babcock Power, Screen