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The flue gas pre-drying of lignite produces a moisture rich dryer exhaust gas which can be further cooled to recover the waste heat and water vapor. An environmental friendly power system is investigated in the present work, which integrates the lignite flue gas pre-drying system with an organic Rankine cycle (ORC) to utilize the waste heat to generate power and capture the condensed water. Simulation...
This paper describes a simulation investigation on the FPLPS (flue gas pre-dried lignite-fired power system) integrated with WHR (waste heat recovery). The plant thermal efficiency of a 600 MW power unit based on FPLPS is found to be improved by 1.70% compared with the CLPS (conventional lignite-fired power system) unit and the water saving is 81 t h−1. The WHR system is composed of air pre-heater...
Lignite is a kind of low rank coal with high moisture content and low net heating value, which is mainly used for electric power generation. However, the thermal efficiency of power plants firing lignite directly is very low. Pre-drying is a proactive option, dehydrating raw lignite to raise its heating value, to improve the power plant thermal efficiency. A pre-dried lignite-fired power system integrated...
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