A boiler system for producing steam from water includes a plurality of serially arranged oxy fuel boilers. Each boiler has an inlet in flow communication with a plurality of tubes. The tubes of each boiler form at least one water wall. Each of the boilers is configured to substantially prevent the i
A boiler system for producing steam from water includes a plurality of serially arranged oxy fuel boilers. Each boiler has an inlet in flow communication with a plurality of tubes. The tubes of each boiler form at least one water wall. Each of the boilers is configured to substantially prevent the introduction of air. Each boiler includes an oxy fuel combustion system including an oxygen supply for supplying oxygen having a purity of greater than 21 percent, a carbon based fuel supply for supplying a carbon based fuel and at least one oxy-fuel burner system for feeding the oxygen and the carbon based fuel into its respective boiler in a near stoichiometric proportion. The oxy fuel system is configured to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance. The boiler tubes of each boiler are configured for direct, radiant energy exposure for energy transfer. Each of the boilers is independent of each of the other boilers.
대표청구항▼
1. A module based oxy-fuel boiler system for producing steam from water, comprising: a first boiler having a feedwater inlet and in a plurality of first boiler tubes for carrying water, the tubes forming a water wall, said feedwater inlet in flow communication with said plurality of tubes, the first
1. A module based oxy-fuel boiler system for producing steam from water, comprising: a first boiler having a feedwater inlet and in a plurality of first boiler tubes for carrying water, the tubes forming a water wall, said feedwater inlet in flow communication with said plurality of tubes, the first boiler configured to substantially prevent the introduction of air;a first boiler oxygen supply for supplying oxygen having a purity of greater than 21 percent to a first boiler oxy-fuel burner system;a first boiler carbon based fuel supply for supplying a carbon based fuel to a first boiler oxy-fuel burner system;a first boiler oxy-fuel burner system, the first boiler oxy-fuel burner system feeding the oxygen and the carbon based fuel into the first boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance,wherein the first boiler tubes are disposed within said first boiler for direct, radiant energy exposure for energy transfer to the water to produce steam according to a predetermined energy transfer function;a second boiler having a second boiler inlet and a plurality of second boiler tubes, said second boiler input being in flow communication with said the second boiler tubes, so that said second boiler is in series with the first boiler and configured to carry out a different energy said predetermined transfer function, wherein steam from said first boiler is fed into said second boiler inletthe tubes in the second boiler forming at least one tube wall, the second boiler configured to substantially prevent the introduction of air;a second boiler oxygen supply for supplying oxygen having a purity of greater then 21 percent for supplying oxygen to a second oxy-fuel burner system;a second boiler carbon based fuel supply for supplying a carbon based fuel for supplying fuel to a second oxy-fuel burner system;second boiler oxy-fuel burner system,the second boiler oxy-fuel burner feeding the oxygen and the carbon based fuel into the second boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance,wherein the second boiler tubes are disposed in the second boiler for direct, radiant energy exposure for energy transfer to produce steam, andwherein the first and second boilers are independent of and in series with one another. 2. The module based oxy-fuel boiler system in accordance with claim 1 wherein the first boiler oxygen supply supplies oxygen having a purity of about 85 percent. 3. The module based oxy-fuel boiler system in accordance with claim 1 wherein the second boiler oxygen supply supplies oxygen having a purity of about 85 percent. 4. The module based oxy-fuel boiler system in accordance with claim 1 wherein the first boiler is a main boiler and the second boiler is a superheat boiler and wherein steam produced by the first boiler is fed directly to the superheat boiler. 5. The module based oxy-fuel boiler system in accordance with claim 4 including a steam turbine, wherein steam exiting the superheat boiler is fed to the steam turbine. 6. The module based oxy-fuel boiler system in accordance with claim 5 further including a reheat boiler, wherein the reheat boiler has a plurality of tubes, the reheat boiler configured to carry out a different energy transfer function than the main boiler and the superheat boiler, the tubes in the reheat boiler forming at least one tube wall, the reheat boiler configured to substantially prevent the introduction of air, the reheat boiler system including an oxygen supply system for supplying oxygen having a purity of greater than 21 percent to a reheat boiler oxy-fuel burner system, a carbon based fuel supply for supplying a carbon based fuel to a reheat boiler oxy-fuel burner system and a reheat boiler oxy-fuel burner system, the reheat boiler oxy-fuel burner system feeding the oxygen and the carbon based fuel into the reheat boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance, wherein the reheat boiler tubes are disposed within the reheat boiler for direct, radiant energy exposure for energy transfer to heat the steam and wherein the reheat boiler is independent of the main boiler and the superheat boiler, the reheat boiler having an inlet, wherein steam from the second boiler is fed to a high pressure section of a turbine and lower pressure steam from said high pressure turbine is fed into said reheat boiler inlet and heated by said reheat boiler. 7. The module based oxy-fuel boiler system in accordance with claim 6 wherein the reheat boiler oxygen supply supplies oxygen having a purity of about 85 percent. 8. The module based oxy-fuel boiler system in accordance with claim 6 including an intermediate pressure turbine, wherein steam produced by the reheat boiler is fed to the intermediate pressure turbine. 9. The module based oxy-fuel boiler system in accordance with claim 8 including a low pressure turbine, wherein steam exhausted from the intermediate pressure turbine is fed to the low pressure turbine and wherein steam exhausted from the low pressure turbine is fed to a condenser. 10. The module based oxy-fuel boiler system in accordance with claim 1 including an economizer having a gas side and a feedwater side, wherein exhaust gases from the first and second boiler flow into the economizer gas side and wherein feedwater flows through the economizer and into the feedwater inlet. 11. The module based oxy-fuel boiler system in accordance with claim 10 wherein the first and second boilers are solid fuel boilers. 12. The module based oxy-fuel boiler system in accordance with claim 11 wherein a portion of the exhaust gases is used to carry solid fuel into the first and seconds boilers. 13. The module based oxy-fuel boiler system in accordance with claim 11 wherein the portion of the exhaust gases that is used to carry solid fuel into at least one of the boilers exhausts from an exhaust gas flow path downstream of the economizer. 14. The module based oxy-fuel boiler system in accordance with claim 10 wherein exhaust gases exhausting from the economizer gas side are used preheat the oxygen supply for the first and second boiler oxygen supplies. 15. The module based oxy-fuel boiler system in accordance with claim 1 wherein the first boiler is a main boiler and the second boiler is a reheat boiler, wherein said main boiler is configured to be in flow communication with a main steam turbine and said reheat boiler is in flow communication with an intermediate pressure turbine, wherein steam exiting the main boiler is fed to the main steam turbine, steam exhausted from the main turbine is fed to the reheat boiler and steam exiting the reheat boiler is fed to the intermediate pressure turbine. 16. The module based oxy-fuel boiler system in accordance with claim 15 including a low pressure turbine, wherein steam exhausts from the intermediate pressure turbine to the low pressure turbine. 17. The module based oxy-fuel boiler system in accordance with claim 16 including a condenser and wherein steam exhausting from the low pressure turbine exhausts to the condenser. 18. The module based oxy-fuel boiler system in accordance with claim 15 including an economizer having a gas side and a feedwater side, wherein exhaust gases from the main and reheat boiler exhaust through the economizer and wherein feedwater from the condenser flow through the economizer and into the feedwater inlet of the main boiler. 19. The module based oxy-fuel boiler system in accordance with claim 18 wherein at least one of the main and reheat boilers are solid fuel boilers. 20. The module based oxy-fuel boiler system in accordance with claim 19 wherein a portion of the exhaust gases is used to carry solid fuel into the at least one of the main and reheat boilers. 21. The module based oxy-fuel boiler system in accordance with claim 20 wherein the portion of the exhaust gases that is used to carry solid fuel into at least one of the boilers exhausts from an exhaust gas flow path downstream of the economizer. 22. The module based oxy-fuel boiler system in accordance with claim 18 wherein exhaust gases exhausting from the economizer gas side preheat the oxygen for the main and reheat boiler oxygen supplies. 23. A boiler system for producing steam from water, comprising a plurality of serially arranged boilers including a first boiler and second boiler, each boiler having an inlet in flow communication with a plurality of tubes, wherein said inlet for said first boiler is for carrying water and said inlet for said second boiler is for receiving steam from said first boiler defining a serial relationship for said first and second boilers, the tubes for each boiler forming at least one tube wall, each of the boilers configured to substantially prevent the introduction of air, each of the boilers including an oxygen supply for supplying oxygen having a purity of greater than 21 percent to a oxy-fuel burner system, a carbon based fuel supply for supplying a carbon based fuel to a oxy-fuel burner system and an oxy-fuel burner system for combusting the oxygen and the carbon based fuel in its respective boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance, wherein the boiler tubes of each boiler are disposed for direct, radiant energy exposure for energy transfer, wherein each of the boilers is independent of each of the other boilers. 24. The boiler system in accordance with claim 23 wherein the oxygen supplies to each boiler have a purity of about 85 percent. 25. The boiler system in accordance with claim 23 including multiple pluralities of serially arranged boilers, each of the multiples being in parallel with one another. 26. The boiler system in accordance with claim 25 wherein each of the multiples is similar to each of the others of the multiples. 27. A method for superheating steam from another boiler in a superheat boiler, said superheat boiler including: a steam inlet for receiving said steam; a plurality of boiler tubes in flow communication with said steam inlet forming at least one tube wall for receiving said steam, wherein said superheat boiler configured to substantially prevent the introduction of air; an oxygen supply for supplying oxygen having a purity of greater than 21 percent; a carbon based fuel supply for supplying a carbon based fuel; an oxy-fuel burner system for receiving said carbon based fuel and said oxygen having a purity of greater than 21 percent; a control system for feeding the oxygen and the carbon based fuel into the said oxy-fuel burner system in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance, wherein said boiler tubes are configured for direct, radiant energy exposure for energy transfer to produce steam; a, the method comprising the steps of: (a) feeding steam from said another boiler to a superheat boiler: and(b) superheating steam from said other boiler to create superheated steam. 28. The method as recited in claim 27, further including the step of: (c) feeding said superheated steam to a high pressure turbine. 29. The method as recited in claim 28, further including the step of: (d) feeding steam exhausted from said high pressure turbine to a reheat boiler, said reheat boiler being similar to said superheat boiler. 30. The method as recited in claim 29, further including the step of: (e) feeding steam from said reheat boiler to an intermediate pressure turbine. 31. The method as recited in claim 30, further including the step of: (f) feeding steam from said intermediate pressure turbine to a low pressure turbine. 32. The method as recited in claim 30, further including the step of: (g) condensing the steam from the low pressure turbine. 33. The method as recited in claim 27, wherein said another boiler is a main boiler. 34. A module based oxy-fuel boiler system comprising: a first boiler configured as a main boiler and a second boiler configured as a reheat boiler, said first boiler configured to substantially prevent the introduction of air and including:a plurality of first boiler tubes for carrying water, the tubes forming at least one water wall,a feedwater inlet line in flow communication with said plurality of first boiler tubes, said feedwater inlet line configured to be connected to an external source of water,a steam outlet line in flow communication with said plurality of first boiler tubes and configured to be connected to a first turbine, said turbine having a steam outlet that is configured to be coupled to a reheat line of a second boiler,a first boiler oxygen supply for supplying oxygen having a purity of greater than 21 percent;a first boiler carbon based fuel supply for supplying a carbon based fuel;at least one first boiler oxy-fuel burner system coupled to said first boiler oxygen supply and said first boiler carbon based supply, the first boiler oxy-fuel burner system configured to feed the oxygen and the carbon based fuel into the first boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon-based fuel to a predetermined tolerance,a first boiler flue gas exit line for discharging exhaust gas generated as a result of the combustion in said first boiler, wherein the first boiler tubes are configured for direct, radiant energy exposure for energy transfer to the water to produce steam;a second boiler having a reheat inlet line in flow communication with the steam outlet of said turbine;a reheat steam outlet line in flow communication with a second turbine,a second boiler flue gas exit line for discharging exhaust gas generated as a result of the combustion in said second boiler, wherein the second boiler is configured to carry out a different energy transfer function than the first boiler and is configured to substantially prevent the introduction of air;a second boiler supply for supplying oxygen having a purity of greater than 21 percent;a second boiler carbon based fuel supply for supplying a carbon based fuel;at least one second boiler oxy-fuel burner system, the second boiler oxy-fuel burner system configured to feed the oxygen and the carbon based fuel into the second boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance. 35. The module based oxy-fuel boiler system in accordance with claim 34, including an economizer having a gas side and a feedwater side, wherein exhaust gases from the reheat boiler exhaust through an economizer. 36. The module based oxy-fuel boiler system in accordance with claim 34, wherein the main and reheat boilers are solid fuel boilers and wherein a portion of the exhaust gases is used to carry solid fuel into at least one of the boilers. 37. The module based oxy-fuel boiler system in accordance with claim 35, wherein exhaust gases exhausting from the economizer gas side preheat the oxygen for the main and reheat boiler oxygen supplies. 38. The module based oxy-fuel boiler system in accordance with claim 34, wherein the second boiler oxygen supply supplies oxygen having a purity of about 85 percent. 39. A module based oxy-fuel combustion system comprising: a main boiler having a feedwater inlet in flow communication with a plurality of tubes for carrying water, the tubes forming at least one water wall, the first boiler configured to substantially prevent the introduction of air;a main boiler oxygen supply for supplying oxygen having a purity of greater than 21 percent;a main boiler carbon based fuel supply for supplying a carbon based fuela main boiler oxy-fuel burner system, the first boiler oxy-fuel burner system feeding the oxygen and the carbon based fuel into the main boiler in a stoichiometric proportion to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance, wherein the combustion produces a flame temperature of more than about 3000° F.; said oxy-fuel burner system configured to provide saturated steam and water;a steam drum for separating the saturated steam and water,wherein the main boiler tubes are configured for direct, radiant energy exposure for energy transfer to the water to produce steam;wherein a secondary steam requirement connected to said steam drum by way of a steam line for receiving saturated steam. 40. The module based oxy-fuel combustion system in accordance with claim 38, wherein the main boiler oxygen supply supplies oxygen having a purity of about 85 percent. 41. The module based oxy-fuel combustion system in accordance with claim 38 wherein saturated steam produced by the main boiler is fed directly to the secondary steam requirement.
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이 특허에 인용된 특허 (38)
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