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Study on optimization design of conventional island system in IGCC

Lili Qi

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Abstract

The 200 MW integrated gasification combined cycle(IGCC) system model was established and calculated.Complied with principle of integrity,influences of different steam-water cycle modes and different matching schemes of HRSG with waste heat cooler on overall performance,local thermal characteristics in IGCC were discussed according to mass balance,energy balance and reaction equilibrium of each unit.The results show that three-pressure reheat steam-water cycle mode is beneficial to recycle waste heat of exhaust from gas turbine,to increase main steam parameters of steam turbine,and to boost overall performance in IGCC.Reasonable matching scheme of HRSG with waste heat cooler is designed according to principle of temperature matching and step utilization of energy.The research results can provide references for optimization design of conventional island in equivalent level IGCC system.

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What this paper is about

The 200 MW integrated gasification combined cycle(IGCC) system model was established and calculated.Complied with principle of integrity,influences of different steam-water cycle modes and different matching schemes of HRSG with waste heat cooler on overall performance,local thermal characteristics in IGCC were discussed according to mass balance,energy balance and reaction equilibrium of each unit.The results show that three-pressure reheat steam-water cycle mode is beneficial to recycle waste heat of exhaust from gas turbine,to increase main steam parameters of steam turbine,and to boost overall performance in IGCC.Reasonable matching scheme of HRSG with waste heat cooler is designed according to principle of temperature matching and step utilization of energy.The research results can provide references for optimization design of conventional island in equivalent level IGCC system.

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Available abstract

The 200 MW integrated gasification combined cycle(IGCC) system model was established and calculated.Complied with principle of integrity,influences of different steam-water cycle modes and different matching schemes of HRSG with waste heat cooler on overall performance,local thermal characteristics in IGCC were discussed according to mass balance,energy balance and reaction equilibrium of each unit.The results show that three-pressure reheat steam-water cycle mode is beneficial to recycle waste heat of exhaust from gas turbine,to increase main steam parameters of steam turbine,and to boost overall performance in IGCC.Reasonable matching scheme of HRSG with waste heat cooler is designed according to principle of temperature matching and step utilization of energy.The research results can provide references for optimization design of conventional island in equivalent level IGCC system.

Key concepts: Integrated gasification combined cycle, Combined cycle, Steam turbine, Waste heat recovery unit, Process engineering, Waste management, Heat recovery steam generator, Waste heat

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