Cogeneration/CO.sub.2 production process and plant
First Claim
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1. A method of generating electric power in a manner that qualifies as a cogeneration facility and producing carbons dioxide (CO2) from exhaust gases, comprising the steps of:
- driving an electric generator with a prime mover that burns a mixture of fossil fuel and an oxygen-containing gas such as air and produces hot exhaust gases;
passing said hot exhaust gases through a waste heat recovery unit to recover thermal energy;
directing cooled exhaust gases coming out of said waste heat recovery unit to a CO2 recovery unit;
processing said cooled exhaust gases in said recovery unit to extract CO2 from said exhaust gases; and
using said recovered thermal energy in said processing step.
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Abstract
In accordance with an illustrative embodiment of the present invention, a cogeneration facility combined with means for producing CO2 includes an internal combustion engine that drives an electrical generator, a waste heat recovery unit through which hot exhaust gases from the engine are passed to recover thermal energy in usable form, and means for conveying exhaust gases coming out of the waste heat recovery unit to a CO2 recovery unit where the CO2 is extracted and made available as a saleable byproduct.
178 Citations
29 Claims
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1. A method of generating electric power in a manner that qualifies as a cogeneration facility and producing carbons dioxide (CO2) from exhaust gases, comprising the steps of:
- driving an electric generator with a prime mover that burns a mixture of fossil fuel and an oxygen-containing gas such as air and produces hot exhaust gases;
passing said hot exhaust gases through a waste heat recovery unit to recover thermal energy;
directing cooled exhaust gases coming out of said waste heat recovery unit to a CO2 recovery unit;
processing said cooled exhaust gases in said recovery unit to extract CO2 from said exhaust gases; and
using said recovered thermal energy in said processing step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- driving an electric generator with a prime mover that burns a mixture of fossil fuel and an oxygen-containing gas such as air and produces hot exhaust gases;
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11. A carbon dioxide (CO2) production and cogeneration facility comprising:
- a prime mover of the type requiring a mixture of fossil fuel and air for internal combustion that produces hot exhaust gases, said prime mover having lubricating oil, a cooling jacket containing a cooling fluid, and an exhaust gas manifold;
heat exchangers for the recovery of rejected heat from said lubricating oil, said cooling jacket fluid, and said manifold to recover thermal energy;
an electric generator driven by said prime mover for producing electric power;
a CO2 recovery unit for removing the CO2 component of said exhaust gases;
means for directing cooled exhaust gases coming out of said manifold to said CO2 recovery unit; and
means for using said recovered thermal energy in said CO2 recovery unit. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- a prime mover of the type requiring a mixture of fossil fuel and air for internal combustion that produces hot exhaust gases, said prime mover having lubricating oil, a cooling jacket containing a cooling fluid, and an exhaust gas manifold;
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18. A portable trigeneration plant comprising:
- a prime mover that burns a mixture of hydrocarbon fuel and oxygen-containing gas and produces an exhaust;
an electric generator driven by said prime mover for producing electric power;
means for recovering waste heat from said prime mover exhaust;
means for providing a supplemental firing of said exhaust to reduce its oxygen content, produce more thermal energy and increase the concentration of carbon dioxide therein;
means associated with said waste heat recovering means for producing steam for driving a steam turbine which drives an electric generator to produce additional electric power;
means for routing said exhaust to a carbon dioxide stripper;
absorber means for contacting said exhaust with a solvent that removes carbon dioxide from solution;
means for processing said carbon dioxide to a usable state; and
means for using said recovered waste heat in the recovery of the carbon dioxide. - View Dependent Claims (19, 20, 21, 22)
- a prime mover that burns a mixture of hydrocarbon fuel and oxygen-containing gas and produces an exhaust;
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23. A carbon dioxide production and cogeneration facility comprising:
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a prime mover of the type requiring a mixture of fossil fuel and an oxygen-containing gas to produce internal combustion, said prime mover having lubricating oil, a cooling jacket containing a cooling liquid, and an exhaust gas manifold that receives hot exhaust gases formed by said combustion; an electric generator driven by said prime mover for producing electric power; a heat recovery unit adapted to recover rejected heat from said hot exhaust gases to produce a cooled exhaust gas stream; a carbon dioxide recovery unit including an absorber that utilizes a solvent solution to absorb carbon dioxide contained in said cooled exhaust gas stream, a carbon dioxide stripper for removing the carbon dioxide from said solvent solution, and a reboiler for heating said solvent solution to enrich the carbon dioxide content thereof; first routing means for directing said cooled exhaust gas stream to said carbon dioxide recovery unit; and second routing means for directing heat recovered by said heat recovery unit to said reboiler. - View Dependent Claims (24, 25)
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26. A method of generating electric power in a manner that qualifies as a cogeneration facility and of producing carbon dioxide from exhaust gases, comprising the steps of:
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driving an electric generator with a prime mover that burns a mixture of fossile fuel and oxygen-containing gas and produces hot exhaust gases; passing said hot exhaust gases through a waste heat recovery unit to recover thermal energy; directing cooled exhaust gases coming out of said waste heat recovery unit to a carbon dioxide recovery unit including a first absorber, a carbon dioxide stripper, and a reboiler for said stripper; providing a solvent solution to absorb carbon dioxide from said cooled exhaust gases passing through said first absorber; routing the solvent solution to said stripper for removal of the carbon dioxide component from the solvent solution; transferring the heat recovered at said recovery unit to a transfer fluid, and separately routing the heat transfer fluid to said reboiler to cause heating of said solvent solution to thereby enrich the carbon dioxide content of said solvent solution. - View Dependent Claims (27, 28)
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29. A method of generating electric power in a manner that qualifies as a cogeneration facility and producing carbon dioxide (CO2) from exhaust gases, comprising the steps of:
- driving an electric generator with a prime mover that burns a mixture of fossil fuel and an oxygen containing gas such as air and produces hot exhaust gases;
passing said hot exhaust gases through a waste heat recovery unit to recover thermal energy;
directing cooled exhaust gases coming out of said waste heat recovery unit to a CO2 recovery unit;
processing said cooled exhaust gases in said recovery unit to extract CO2 from said exhaust gases; and
using said recovered thermal energy in said processing step.
- driving an electric generator with a prime mover that burns a mixture of fossil fuel and an oxygen containing gas such as air and produces hot exhaust gases;
Specification