Fluid bed direct contact steam generator system and process
First Claim
1. A method for vertically producing a steam and combustion gas mixture, the method comprising:
- mixing a carbon or hydrocarbon fuel and an oxidation gas containing oxygen;
combusting the mixture at a controllable pressure and temperature so as to convert the fuel to a flowing gas and solid byproducts, said solid byproducts being in a solid or a liquid form;
mixing liquid water into the flowing gas, said liquid water having suspended and dissolved solids and organics and being injected in an amount such that said liquid water is converted into steam while reducing the combustion gas temperature for generating produced gas;
converting liquids to gas and solids so as to generate steam and solid waste;
injecting a portion of said produced gas at a temperature lower than the combustion gas temperature through a fluid bed section below the combustion so as to increase the heat exchange duration and to cool combustion solid particles where the injected produced gas is injected below the combustion; and
discharging the produced steam, gas and solid mixture.
1 Assignment
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Accused Products
Abstract
The present invention is a method and system for vertically producing a steam and combustion gas mixture, typically used in enhanced oil recovery processes. The system is a fluid bed up-flow combustor system, including a vertical vessel with fours sections. In a first section, fuel, oxidizer, and possibly water are supplied to the high pressure combustor at a combustion section of a vertical vessel. The combustion gas from the first section flows to a second section for steam generation, where low quality water is injected and turned into steam. Next, the third section is a homogenizer vessel, where any remaining water drops are converted to steam and solid particles and discharged from the vessel. The fourth section located at the bottom of the vessel is a fluid bed, receiving and processing the falling solids from the combustion and the steam generation sections.
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Citations
13 Claims
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1. A method for vertically producing a steam and combustion gas mixture, the method comprising:
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mixing a carbon or hydrocarbon fuel and an oxidation gas containing oxygen; combusting the mixture at a controllable pressure and temperature so as to convert the fuel to a flowing gas and solid byproducts, said solid byproducts being in a solid or a liquid form; mixing liquid water into the flowing gas, said liquid water having suspended and dissolved solids and organics and being injected in an amount such that said liquid water is converted into steam while reducing the combustion gas temperature for generating produced gas; converting liquids to gas and solids so as to generate steam and solid waste; injecting a portion of said produced gas at a temperature lower than the combustion gas temperature through a fluid bed section below the combustion so as to increase the heat exchange duration and to cool combustion solid particles where the injected produced gas is injected below the combustion; and discharging the produced steam, gas and solid mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for producing a pressurized steam mixture for enhanced oil recovery comprising:
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combusting a mixture of fuel and oxidation gas under controllable pressures and temperatures to generate combustion gases; mixing the combustion gases with liquid having suspended solids in a vertical pressurized vessel to directly generate a mixture of combustion gas and steam from the liquid water; evaporating the liquid water with the combustion gas mixture to leave the solids in a dry form and to reduce a temperature of the combustion gas; recycling a portion of the generated combustion gas and steam mixture to a bottom of the vertical pressurized vessel to generate combustion gas steam fluid bed up-flow gas; transferring the combustion gases to a dry-solid separator unit; and removing dry solids from the dry-solid separator unit. - View Dependent Claims (12, 13)
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Specification