Ductwork: Materials of construction for flue gas desulfurization systems

Conference · Fri Sep 01 04:00:00 EDT 1995

OSTI ID:94160

O`Donnell, R J; Khederian, J C; Martin, J E ^[1]; Watson, W K ^[2]

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1. Stone and Webster Engineering Corp., Boston, MA (United States)
2. Indianapolis Power and Light, IN (United States)

This paper identifies the ductwork materials required for the various service conditions in the wet limestone flue gas desulfurization system (FGDS) at Indianapolis Power and Light Company`s (IPL) Petersburg Units 1 and 2. This project was initiated by IPL in response to the Clean Air Act Amendments (CAAA) of 1990 and is intended to treat the flue gas from two base-loaded units with a combined capacity of approximately 700 MW gross electrical output. The flue gas conditions include hot unscrubbed gas (bypass), hot unscrubbed gas mixed with cool ambient air (normal), a mixing zone of gas only/air only associated with an open bypass system (no damper), and cool, wet scrubbed gas (outlet ducts). In addition, there are upset conditions associated with the loss of an air preheater. This system is somewhat unique, in that each unit has its own separate open or undampered bypass system, including separate stack liners. While a separate bypass system eliminates the extremely severe corrosion problems associated with mixing unscrubbed gas and scrubbed gas in a common bypass flue, it does create potential problems mixing cool ambient air with hot flue gas.

• OSTI ID: 94160
• Report Number(s): CONF-950414--
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
DESIGN
DESULFURIZATION
FLUE GAS
LIME-LIMESTONE WET SCRUBBING PROCESSES
SCRUBBERS
SULFUR DIOXIDE