Energy form Wate ( EFW)[Jan. 19, 2012 9:57:44]
Specification
Energy from waste ( EfW) facilities combust waste under controlled conditions, to reduce its volume and hazardousness, and to generate electricity and/ or heat. Electricity generated from a typical 100, 000tpa facility would be roughly equivalent to the electricity usage of 10, 000 houses and would be exported to the national grid. Any heat produced by the plant could be used in industrial or district heating schemes if appropriate to the need and the infrastructure can be developed. Plant capacities are regarded as small scale ( ~ 150, 000 tpa or less) , medium scale ( ~ 150 - 250, 000 tpa) or large scale ( > 250, 000 tpa) based on available throughputs. CHP schemes are particularly suitable in urban locations where there is likely to be a heat demand within
a reasonable distance of the CHP plant.
Incinerators require control measures for stack emissions, flue gas cleaning equipment e.g. acid scrubbing plant, carbon injection system, electrostatic precipitators or fabric ' type' filters must be provided, depending on the type of control system employed. The equipment employed for the control of stack emissions can occupy much of the space required by the plant and these cleaning processes are now well established in the UK ( and additional good practice can be demonstrated in EfW plant overseas, where emissions levels are tighter still) and form a significant proportion of the overall capital costs of the plant ( 30 – 60% )
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