Integrated heat recovery systems and methods for increasing...

Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation

Reexamination Certificate

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C060S651000, C060S671000

Reexamination Certificate

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07062912

ABSTRACT:
An air separation unit separates air into an oxygen-rich and oxygen-deficient gas. Fuel gas and the oxygen-rich gas are preheated at heat exchangers through which hot flue gas flows. Combustion of the preheated fuel and oxygen-rich gases result in the hot flue gas. The hot flue gas is cooled at the heat exchangers and flows through a waste heat boiler. Water and/or steam flowing through the waste heat boiler absorbs energy from the cooled flue gas thereby producing heated steam. The heated steam flows through a turbine to produce power. The power is transferred to the air separation unit, thus reducing a power requirement of the air separation unit needed to separate the air.

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Article, International Journal Glass, Apr. 1998, “Process for Heat Recovery and Energy Savings in a (Oxy-Fired) Glass Furnace: A Technology Survey”, Illy, Borders, Joshi, Zucchelli and Jurcik.

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