Method using gas-gas heat exchange with an intermediate direct c

Details Method using gas-gas heat exchange with an intermediate direct c Method using gas-gas heat exchange with an intermediate direct c

1993-05-07

1995-03-21

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39511, 60 3953, F02C 330

Patent

active

053984978

ABSTRACT:
A method for burning slurry, liquid, or gaseous fuels at elevated pressures allows lower quality fuels to yield more energy and higher quality energy due to increased dew point temperatures in flue gases and high temperature heat exchange. The combination of elevated pressures and oxygen rich oxidant allows increased waste heat recovery, higher quality heat recovery, and substantially reduced air pollution. Turbochargers operated by flue gas and pressurized air, force the oxygen into the combustion chamber at increased pressures. Oxygen permeable membranes lower levels of nitrogen and reduce pollution by enhancing the stripping of pollutants from the flue gas and by the absolute reduction of flue gas exhaust. Latent heat recovery and water dilution of combustion mixtures are important aspects of the embodiments of this invention; both are enhanced by the vaporization of influent liquids while contacting influent gasses. High temperature heat exchange is facilitated by direct contact heat exchange means. Substantially reduced pollution levels allow operation in residential and downtown areas where cogenerated heat and coolant can be utilized. This method is particularly useful for converting garbage or sewage into electricity and for increased biomass combustion efficiency; however, advantages of this method can also be realized for most conventional fuels.

REFERENCES:
patent: 2186706 (1940-01-01), Martinka
patent: 2781635 (1957-02-01), Brogdon
patent: 4448018 (1984-05-01), Sayama et al.
patent: 4537023 (1985-08-01), Nakamura
patent: 4733528 (1988-03-01), Pinto

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