IECM 12.0 beta User Manual > Modules Included with the IECM > Pulverized Coal (PC) Plant > SET PARAMETERS > NOx Control > 2. Hot-Side SCR >

Retrofit or Adjustment Factors

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See Retrofit or Adjustment Factor Inputs for an explanation of retrofit costs. The Hot-Side SCR system has the following capital cost process areas:

•Reactor Housing: The reactor housing costs include carbon steel reactor vessel with six inches of mineral wool insulation, vessel internals and supports, steam sootblowers, reactor crane and hoist, installation, labor, foundations, structures, piping, and electrical equipment.

•Ammonia Injection: The ammonia unloading, storage, and supply system includes a storage vessel with a seven-day capacity, an ammonia vaporizer, mixer, injection grid, ductwork, dampers, and a truck unloading station.

•Ducts: The ductwork includes economizer bypass and outlet ducts, SCR inlet and outlet ducts, SCR and economizer control dampers, air preheater inlet plenum, various expansion joints in the ductwork, and air preheater cross-over ducting.

•Air Preheater Modifications: Thicker and smoother material is used for the heat transfer surfaces in the preheater. A larger motor is provided for the heat exchanger. High pressure steam soot blowers and water wash spray nozzles are also added.

•ID Fan Differential: The ID fans must be sized to deal with the increased flue gas pressure drop resulting from the additional ductwork and the SCR reactor.

•Structural Support: The costs of this area are related primarily to the structural support required for the SCR reactor housing, ductwork, and air preheater.

•Miscellaneous Equipment: This area includes the capital costs incurred for ash handling addition, water treatment addition, and flow modeling for a hot-side SCR system.