Defining CCS Ready: An Approach to An International Definition

Chapter 2: Capture Ready Plant DefinitionThe amount of space required will also be influenced by the particular choice of plant layout.The layout of a plant’s equipment will depend on the particulars of the chosen plant site, andeach site will need to be designed for CCS retrofitting based on its own merits, land shape,and area restrictions. For example, in a new power plant, one potential location for postcombustioncapture facilities is to be as close as possible to the boiler and turbine house.However, this option may not be available due to land availability and tight layout of otherplant equipmentThere are, however, some general plantdesign and layout considerations for the CCSReady options. Typical power plants are builtin a linear layout (see Exhibit 2-3), with theboiler and auxiliaries in a central location.The boiler delivers steam to the turbine hall,which generates electricity, and a switchyardis near the turbine hall. The emission controlequipment, ID fan, and stack are in the otherdirection from the boiler house. The samedesign applies for multiple units that arereplicated next to each other.Exhibit 2-3: Typical Layout for a600 MW Supercritical PulverisedCoal Power PlantIn contrast, for Capture Ready power plantsa non-linear layout approach may bedesirable, with the main designcharacteristics and plant layout optimised toreduce energy consumption and reduce theoccurrence of high-grade thermal losses. Forexample, the absorber and stripper need tobe close to both the flue gas ducts and theturbine (for bled steam for solventregeneration). To address this situation, theoverall plant layout could be horseshoeshaped(see Exhibit 2-4).As the above plant layout designs indicate, tooptimize operations, space allowance is bestaddressed in the context of plant design, notjust by summing up the footprint of requiredcapture facilities.Source : Aurecon23 February 2010 26