Use of Once Through Steam Generators (OTSG) in power plants offers several unique advantages over traditional drum boilers which include smaller footprint, high turndown, fast start and simplified operator control. Commonly OTSGs are equipped with duct burners for additional steam capacity and emissions control equipment. When OTSGs are designed to operate in dry mode, the plant has maximum flexibility to match steam demand to process requirements. OTSGs are also used in Enhanced Oil Recovery applications and in Organic Rankine Cycle low temperature waste heat recovery. This presentation will look at the OTSG technology and peripheral equipment such as burners and emissions equipment.
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