Method and an apparatus for producing energy by recycling materials during a fuel combustion process
First Claim
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1. A method for producing energy by recycling materials during a fuel combustion process (1) taking place in a fuel combustion device, which is a boiler or a furnace, wherein the fuel combustion process comprises combusting fuel introduced into the fuel combustion process, wherein the method comprises:
- introducing a stream of flue gas (4) comprising carbon dioxide and produced in the fuel combustion process (1) into a biomass cultivating process (2), where the flue gas takes part in the production of biomass and oxygen;
introducing at least part of the biomass produced in the biomass cultivating process (2) into a biogas production process (3), where the biomass takes part in the production of biogas;
introducing at least part of the oxygen produced in the biomass cultivating process (2) into the fuel combustion process (1);
introducing at least part of the biogas produced in the biogas production process (3) into the fuel combustion process (1), where the biogas is combusted as fuel; and
introducing combustion air (9) comprising oxygen and nitrogen into the fuel combustion process;
such that the need to introduce fuel (11) selected from a group of fossil fuel comprising coal, biofuel, industrial waste, municipal waste and any combination thereof, into the fuel combustion process (1) during the fuel combustion process in addition to the biogas produced in the biogas production process (3) and introduced into the fuel combustion process is reduced.
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Abstract
The present invention relates to a method for producing energy by recycling materials during a fuel combustion process, wherein the fuel combustion process comprises combusting fuel introduced into the fuel combustion process. Further, the invention relates to an apparatus for producing energy by recycling materials during a fuel combustion process.
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Citations
13 Claims
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1. A method for producing energy by recycling materials during a fuel combustion process (1) taking place in a fuel combustion device, which is a boiler or a furnace, wherein the fuel combustion process comprises combusting fuel introduced into the fuel combustion process, wherein the method comprises:
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introducing a stream of flue gas (4) comprising carbon dioxide and produced in the fuel combustion process (1) into a biomass cultivating process (2), where the flue gas takes part in the production of biomass and oxygen; introducing at least part of the biomass produced in the biomass cultivating process (2) into a biogas production process (3), where the biomass takes part in the production of biogas; introducing at least part of the oxygen produced in the biomass cultivating process (2) into the fuel combustion process (1); introducing at least part of the biogas produced in the biogas production process (3) into the fuel combustion process (1), where the biogas is combusted as fuel; and introducing combustion air (9) comprising oxygen and nitrogen into the fuel combustion process;
such that the need to introduce fuel (11) selected from a group of fossil fuel comprising coal, biofuel, industrial waste, municipal waste and any combination thereof, into the fuel combustion process (1) during the fuel combustion process in addition to the biogas produced in the biogas production process (3) and introduced into the fuel combustion process is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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