COAL FIRED OXY PLANT WITH HEAT INTEGRATION

摘要

A coal fired Oxy boiler power plant having a combustion system configured to burn coal using an oxygen stream to produce a flue gas stream, a CO2 capture system connected to the flue gas stream and a steam cycle with serially arranged low pressure heaters forming part of a condensate system. The combustion system includes, an Air Separation Unit for removing N2 from air to produce the oxygen stream for the boiler. The Air Separation Unit includes an Air Separation Unit heat exchanger that is thermally and fluidly connected to the condensate system so as to be fluidly parallel to at least one serial low pressure heater and fluidly parallel to at least one less that the total number of serial low pressure heaters. The Flue Gas Heat Recovery System, Flue Gas Condenser and Gas Processing unit are thermally integrated into the condensate system.

主权项

1. A coal fired Oxy boiler power plant having:
a combustion system comprising:
an Air Separation Unit, for removing N2 from air to produce an oxygen stream, having an Air Separation Unit heat exchanger;a steam boiler configured to burn coal by using the oxygen stream to produce a flue gas stream;a CO2 capture system configured and arranged to remove CO2 from the flue gas stream; a steam power plant with a condensate system comprising:
a condenser for condensing steam;a plurality of serial low pressure heaters, arranged in series and sequentially in a direction of a condensate flow, configured and arranged to receive the condensate from the condenser; anda feed water tank configured and arranged to receive condensate from the from the serial low pressure heaters; wherein The Air Separation Unit heat exchanger is thermally and fluidly connected to the condensate system by an Air Separation Unit heat exchanger condensate line so as to be fluidly parallel to at least one of the serial low pressure heater heaters and fluidly parallel to at least one less than a total number of the serial low pressure heaters.