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Processing & Handling :: Thermal & Energy Management :: Boilers & Steam Handling

July 1, 2009

The Shotgun Approach: Removal of Fouling Deposits on Heat Transfer Surfaces in Coal-Fired Process Heaters & Boilers

When conventional soot blowers are inadequate, an automated shot-blasting system offers a powerful solution

Alan Cross

The heat transfer sufaces of coal-fired process heaters and boilers often undergo severe fouling. If left intact, such deposits, consisting of slag from mineral matter contained in the coal, can reduce heat-transfer-surface availability, reduce thermal efficiency and cause corrosion. If the deposits are adherent and cannot be removed by conventional steam soot-blowers, shutdown and more rigorous cleaning is required. Maintenance personnel have been known to use shot cleaning as a means of removing stubborn deposits. This article proposes the installation of permanent, on-stream shot-blasting equipment for adherent deposit removal...

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