Hot Gas Filtration: A Simple Screening Method for Optimized Processing Conditions with a Powder Shear Cell

This application report presents a simple powder rheology screening method to find the critical temperature of fusibility/stickiness of filter dust, ensuring optimized processing conditions for maximum efficiency.

Removing particulate matter with hot gas filtration is a powerful tool to clean process gas flows. This filtration method can clean considerable amounts of matter load up to 1000 °C. A major problem for this filtration method is the clogging of the filter candles at critical temperatures caused by the fusibility/stickiness of the particulate matter, resulting in the need of cleaning and in the worst case demanding a shut-down of the plant. This application report discusses a novel screening and analysis method using a powder shear cell to find the critical temperature where the filter dust starts to be sticky and clog the filters.

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