IECM 12.0 beta User Manual > Modules Included with the IECM > Integrated Gasification Combined Cycle (IGCC) Plant > GET RESULTS > Gasifier Area > Shell >

Capital Cost

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This is a standard capital cost result screen. The following process areas are shown:

•Coal Handling: This is the cost associated with the coal handling process area. Coal handling involves unloading coal from a train, storing the coal, moving the coal to the grinding mills, and feeding the gasifier with positive displacement pumps. A typical coal handling section contains one operating train and no spare train. A train consists of a bottom dump railroad car unloading hopper, vibrating feeders, conveyors, belt scale, magnetic separator, sampling system, deal coal storage, stacker, reclaimer, as well as some type of dust suppression system. Slurry preparation trains typically have one to five operating trains with one spare train. The typical train consists of vibrating feeders, conveyors, belt scale, rod mills, storage tanks, and positive displacement pimps to feed the gasifiers. All of the equipment for both the coal handling and the slurry feed are commercially available. The direct cost model for the coal handling is based upon the overall flow to the plant rather than on a per train basis.

•Gasifier Area: The Shell gasification section of an IGCC plant contains gasifier, gas cooling, slag handling, and ash handling sections. For IGCC plants of 400 MW to 1100 MW, typically 4 to 8 operating gasification trains are used along with one spare train.

•Low Temperature Gas Cooling: This is the cost associated with the Low Temperature Gas Cooling process area. The low temperature gas cooling section includes a series of three shell and tube exchangers. The number of operating trains are estimated based on the total syngas mass flow rate and the range of syngas flow rates per train used.

•Process Condensate Treatment: Thetreated process condensate is used as make-up to the gas scrubbing unit, and because blowdown from the gas scrubbing unit is the larger of the flow streams entering the process condensate treatment section, it is expected that process condensate treatment cost will depend primarily on the scrubber blowdown flow rate.

•Activated Carbon Injection: Activated carbon is used to remove mercury.