CN218178881U - Pure oxygen combustor for solid oxide fuel cell system - Google Patents
Pure oxygen combustor for solid oxide fuel cell system Download PDFInfo
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- CN218178881U CN218178881U CN202222723248.3U CN202222723248U CN218178881U CN 218178881 U CN218178881 U CN 218178881U CN 202222723248 U CN202222723248 U CN 202222723248U CN 218178881 U CN218178881 U CN 218178881U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The utility model discloses a pure oxygen burner for a solid oxide fuel cell system, which comprises a circulating oxygen chamber, a combustion chamber, an oxygen inlet pipeline, a carbon dioxide inlet pipeline and a comprehensive mixed gas inlet channel part; the circulating oxygen chamber is positioned outside the combustion chamber and communicated with the combustion chamber, and heat exchange is carried out between the combustion chamber and the circulating oxygen chamber to cool the combustion chamber; the upper part of the circulating oxygen chamber is communicated with an oxygen inlet pipeline and a carbon dioxide inlet pipeline; the comprehensive mixed gas inlet channel part is communicated with the combustion chamber, and natural gas, air and the stack tail gas enter the combustion chamber through the comprehensive mixed gas inlet channel part. The utility model discloses a carry out the heat transfer between combustion chamber and the circulation oxygen cavity and be used for cooling off the combustion chamber, extension combustor life improves the stable combustion performance of pure oxygen combustor.
Description
Technical Field
The utility model relates to a solid oxide fuel cell system, concretely relates to solid oxide fuel cell system uses pure oxygen combustor.
Background
As an important part of an energy system, the combustor takes energy conservation and high efficiency as important development indexes. The pure oxygen burner technology is derived from the oxygen-enriched combustion technology. The oxygen-enriched combustion technology is an energy-saving technology popularized by the state, and the combustion-supporting gas is converted from air to pure oxygen, so that the ignition energy is rapidly reduced. The oxygen-enriched and pure-oxygen combustion technology has the advantages of reducing the ignition temperature of fuel, reducing burnout time, reducing excess air coefficient, reducing the amount of flue gas after combustion, reducing the emission of nitrogen oxides and the like.
Referring to an internet webpage https:// zhuanlan. Zhihu.com/p/526792980 published on 6/10/2022, the webpage indicates that in a pure oxygen burner, due to the reduction of the smoke amount, the disturbance of the smoke to the inside of a hearth is reduced, so that the pure oxygen is unevenly distributed in the burner, and a local high-temperature concentration phenomenon occurs. Localized high temperature concentration within the combustor can cause the combustor to be excessively oxidized, which in turn affects the useful life of the combustor.
Disclosure of Invention
The invention aims to: the utility model aims to solve the technical problem that to prior art not enough, provide a solid oxide fuel cell is pure oxygen combustor for system, through the mode with the temperature in the circulation oxygen chamber cooling combustion chamber, avoid leading to local violent oxidative combustion because of the local high temperature that the pure oxygen burning produced to improve the stable combustion performance of pure oxygen combustor, reduce the oxidation rate of combustor, prolong the life of combustor.
In order to solve the technical problem, the utility model discloses a solid oxide fuel cell is pure oxygen combustor for system, this pure oxygen combustor include circulation oxygen cavity, combustion chamber, oxygen inlet pipeline, carbon dioxide inlet pipeline and synthesize the gas mixture inlet channel part. The circulation oxygen chamber is located the outside of combustion chamber and communicates with combustion chamber, carries out the heat transfer between combustion chamber and the circulation oxygen chamber and is used for cooling combustion chamber. The upper part of the circulating oxygen chamber is communicated with an oxygen inlet pipeline and a carbon dioxide inlet pipeline. The comprehensive mixed gas inlet channel part is communicated with the combustion chamber, and natural gas, air and the stack tail gas enter the combustion chamber through the comprehensive mixed gas inlet channel part.
Further, the combustion chamber comprises a first cylinder and a premixed gas pore plate connected with an opening at the bottom of the first cylinder, the circulating oxygen chamber comprises a second cylinder coaxially arranged outside the first cylinder and a circulating oxygen chamber bottom plate hermetically connected with an opening at the bottom of the second cylinder, and the combustion chamber is communicated with the circulating oxygen chamber through the premixed gas pore plate.
Furthermore, the oxygen inlet pipeline and the carbon dioxide inlet pipeline are respectively communicated with the second cylinder, the axis of the oxygen inlet pipeline and the axis of the carbon dioxide inlet pipeline are respectively tangent to a central cylinder surface between the second cylinder and the combustion chamber, and the position of the oxygen inlet pipeline deflects along the circumferential direction of the second cylinder relative to the position of the carbon dioxide inlet pipeline.
Furthermore, synthesize gas mixture inlet channel part and include natural gas inlet channel, air inlet channel, galvanic pile tail gas inlet channel and gas mixture shower nozzle, gas mixture shower nozzle and natural gas inlet channel, air inlet channel and galvanic pile tail gas inlet channel intercommunication. The mixed gas nozzle is positioned in the combustion chamber.
Furthermore, the natural gas inlet channel, the air inlet channel and the electric pile tail gas inlet channel are positioned between the premixed gas pore plate and the circulating oxygen chamber bottom plate.
Furthermore, the second cylinder body is provided with a first communicating hole, a second communicating hole and a third communicating hole, the first communicating hole is communicated with the natural gas inlet channel, the second communicating hole is communicated with the air inlet channel, and the third communicating hole is communicated with the stack tail gas inlet channel.
Further, this pure oxygen combustor still includes the burning torch sleeve pipe, and burning torch sleeve pipe's one end is located the combustion chamber, and the other end is worn out and is thoughtlessly gas orifice plate and circulation oxygen chamber bottom plate intercommunication in advance for make the burning torch stretch into in the combustion chamber via burning torch sleeve pipe is inside.
Furthermore, the pure oxygen combustor also comprises a high-temperature flue gas outlet channel, and the high-temperature flue gas outlet channel is communicated with the combustion chamber and an external heat exchange device.
Furthermore, the pure oxygen combustor also comprises a heat accumulator, and the heat accumulator is arranged in the combustion chamber.
Furthermore, the heat accumulator is arranged on the comprehensive mixed gas inlet channel part and is positioned above the mixed gas spray head.
Has the advantages that:
(1) The utility model provides a solid oxide fuel cell is pure oxygen combustor for system sets up the circulation oxygen cavity outside the combustion chamber, and the circulation oxygen cavity exchanges heat with the combustion chamber, through the combustion-supporting gas such as oxygen that transfers the surplus heat of pure oxygen burning in the combustion chamber to the circulation oxygen cavity, has balanced the temperature distribution in the combustion chamber, has reduced because of the burning intracavity temperature is higher and higher, the risk that oxidation reaction speed leads to local violent combustion more and more fast, is favorable to improving the stable combustion performance of pure oxygen combustor; meanwhile, the temperature distribution in the combustion chamber is balanced, so that the combustor is prevented from being excessively oxidized due to intensive combustion of pure oxygen, and the service life of the combustor is prolonged.
(2) The utility model discloses a combustion chamber preheats combustion-supporting gases such as the oxygen in the circulation oxygen chamber with the heat transfer between the circulation oxygen chamber, and oxygen and carbon dioxide after preheating get into the combustion chamber, help shortening the combustion reaction time to help the improvement of raw materials conversion rate, and then optimized the burnout performance of pure oxygen combustor.
(3) The utility model discloses a set up annular columnar circulation oxygen cavity, oxygen inlet pipeline and carbon dioxide inlet pipeline all communicate with the second barrel respectively, oxygen inlet pipeline's axis and carbon dioxide inlet pipeline's axis all tangent with the central cylinder face that is located between second barrel and the combustion chamber respectively, the relative carbon dioxide inlet pipeline's in position of oxygen inlet pipeline position deflects along the circumferencial direction of second barrel, make fluid top-down ground spiral-flow type flow in annular columnar circulation oxygen cavity, more be favorable to cold and hot convection heat transfer, further strengthened the heat exchange efficiency between circulation oxygen cavity and the combustion chamber, the stable combustion performance of pure oxygen combustor has further been improved.
(4) The utility model discloses a structural design of integration, compact structure, integrated temperature is balanced, preheat and combustion function.
Drawings
These and/or other advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings and the following detailed description.
Fig. 1 is a front view of a pure oxygen burner for a solid oxide fuel cell system according to an embodiment of the present invention.
Fig. 2 is a sectional view a of the oxy-fuel burner for the sofc system shown in fig. 1.
Fig. 3 is a top view of a pure oxygen burner for the sofc system shown in fig. 1.
Fig. 4 is a schematic diagram illustrating an overall structure of a pure oxygen burner for the solid oxide fuel cell system shown in fig. 1.
Fig. 5 is a schematic structural diagram of an integrated mixture intake passage component according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a premixed gas orifice plate according to an embodiment of the present invention.
Detailed Description
The utility model discloses a reference numeral is as follows: the device comprises an ignition gun sleeve 10, a heat accumulator 20, a combustion chamber 40, a circulating oxygen chamber 50, a comprehensive mixed gas inlet channel part 70, a high-temperature flue gas outlet channel 90, a first cylinder 4010, a premixed gas orifice plate 4020, a second cylinder 5010, a first communication hole 5011, a second communication hole 5012, a third communication hole 5013, a circulating oxygen chamber bottom plate 5020, a natural gas inlet channel 7010, an air inlet channel 7020, a pile tail gas inlet channel 7030, a mixed gas spray head 7040, an oxygen inlet pipeline 8010 and a carbon dioxide inlet pipeline 8020.
The technical solution of the present invention will be explained in detail with reference to the accompanying drawings.
Actual stack tail gas in solid oxide fuel cell systemsComprises CO and CO 2 、H 2 And water vapor. The pure oxygen combustor is used as a recovery and utilization component of the galvanic pile tail gas, and on one hand, the pure oxygen combustor plays a role in converting the actual galvanic pile tail gas into carbon dioxide capable of being captured; on the other hand, the tail gas of the electric pile is recycled to provide heat for the solid oxide fuel cell system, so that the utilization rate of fuel in the solid oxide fuel cell system is improved.
Referring to fig. 1 to 4, the present invention provides a pure oxygen burner for a solid oxide fuel cell system, which includes a circulating oxygen chamber 50, a combustion chamber 40, an oxygen inlet pipe 8010, a carbon dioxide inlet pipe 8020, and a comprehensive mixed gas inlet passage part 70. The combustion chamber 40 is a space in which a combustion reaction is performed. The circulating oxygen chamber 50 is located outside the combustion chamber 40 and communicates with the combustion chamber 40, and heat exchange is performed between the combustion chamber 40 and the circulating oxygen chamber 50 for cooling the combustion chamber 40. The circulating oxygen chamber 50 is in communication with an oxygen inlet conduit 8010 and a carbon dioxide inlet conduit 8020. The integrated mixed gas intake passage part 70 is communicated with the combustion chamber 40, and natural gas, air and stack tail gas enter the interior of the combustion chamber 40 through the integrated mixed gas intake passage part 70.
Natural gas, air and stack tail gas enter the combustion chamber 40 through the integrated mixed gas inlet passage part 70 to be combusted. Oxygen is introduced into the circulating oxygen chamber 50 through the oxygen inlet line 8010 and carbon dioxide is introduced into the circulating oxygen chamber 50 through the carbon dioxide inlet line 8020. The excess heat of the oxidation combustion in the combustion chamber 40 preheats the oxygen and the carbon dioxide in the circulating oxygen chamber 50, balances the temperature distribution in the combustor, and improves the stable combustion performance of the pure oxygen combustor. Meanwhile, preheated oxygen and carbon dioxide enter the combustion chamber 40 to participate in combustion, which is more beneficial to uniform combustion.
In some embodiments of the present disclosure, referring to fig. 2 and 4, the combustion chamber 40 includes a first cylinder 4010 and a premixed gas orifice plate 4020 connected to a bottom opening of the first cylinder 4010, the circulating oxygen chamber 50 includes a second cylinder 5010 coaxially disposed outside the first cylinder 4010 and a circulating oxygen chamber bottom plate 5020 hermetically connected to a bottom opening of the second cylinder 5010, and the combustion chamber 40 is communicated with the circulating oxygen chamber 50 through the premixed gas orifice plate 4020.
Through the integrated structure design of the combustion chamber 40 and the circulating oxygen chamber 50, the combustor with the temperature balancing and combustion functions is miniaturized, so that the combustor is suitable for a low-power solid oxide fuel cell system.
Specifically, referring to fig. 6, the surface of premix gas orifice plate 4020 is provided with a plurality of vent holes for further premixing the oxygen and carbon dioxide.
In some embodiments of the present invention, referring to fig. 3, the oxygen inlet conduit 8010 and the carbon dioxide inlet conduit 8020 are both in communication with the second barrel 5010, respectively, and the position of the oxygen inlet conduit 8010 is deflected along the circumferential direction of the second barrel 5010 relative to the position of the carbon dioxide inlet conduit 8020.
Through the arrangement of the oxygen inlet pipeline 8010 and the carbon dioxide inlet pipeline 8020 which are respectively communicated with the second cylinder 5010, the position of the oxygen inlet pipeline 8010 deflects along the circumferential direction of the second cylinder 5010 relative to the position of the carbon dioxide inlet pipeline 8020, so that fluid flows in a circular cylindrical circulating oxygen chamber from top to bottom in a cyclone manner, cold and hot convection heat exchange is facilitated, the heat exchange efficiency between the circulating oxygen chamber and a combustion chamber is further enhanced, and the stable combustion performance of the pure oxygen combustor is further improved.
Preferably, the axis of the oxygen inlet conduit 8010 and the axis of the carbon dioxide inlet conduit 8020 are both tangential to a central cylindrical surface (not shown) located between the second cylinder 5010 and the combustion chamber 40, respectively.
The central cylinder face between the second cylinder 5010 and the combustion chamber 40 means a cylindrical face passing through the midpoint of the width of the annular space between the second cylinder 5010 and the combustion chamber 40 and disposed coaxially with the second cylinder 5010.
By arranging the axis of the oxygen inlet conduit 8010 and the axis of the carbon dioxide inlet conduit 8020 to be tangential to the central cylindrical surface between the second cylinder 5010 and the combustion chamber 40, it is further facilitated to form a swirling flow of fluid from top to bottom in the annular cylindrical circulating oxygen chamber.
In some embodiments of the present invention, referring to fig. 5, the integrated mixture inlet channel component 70 includes a natural gas inlet channel 7010, an air inlet channel 7020, a stack tail gas inlet channel 7030, and a mixture nozzle 7040, and the mixture nozzle 7040 is communicated with the natural gas inlet channel 7010, the air inlet channel 7020, and the stack tail gas inlet channel 7030. The mixed gas showerhead 7040 is located within the combustion chamber 40.
In some embodiments of the present disclosure, referring to fig. 2 and 4, a natural gas inlet channel 7010, an air inlet channel 7020, and a 10 stack tail gas inlet channel 7030 are located between the premix gas orifice plate 4020 and the circulating oxygen chamber bottom plate 5020.
In some embodiments of the present invention, referring to fig. 4, the second cylinder 5010 is provided with a first communication hole 5011, a second communication hole 5012, and a third communication hole 5013, the first communication hole 5011 is communicated with a natural gas inlet passage 7010, the second communication hole 5012 is communicated with an air inlet passage 7020, and the third communication hole 5013 is communicated with a stack tail gas inlet passage 7030.
In some embodiments of the present invention, referring to fig. 4, the pure oxygen burner further comprises a squib sleeve 10, one end of the squib sleeve 10 is located in the combustion chamber 40, and the other end penetrates through the premixed gas orifice plate 4020 to communicate with the circulating oxygen chamber bottom plate 5020. The ignition gun protrudes into the combustion chamber 40 through the inside of the ignition gun sleeve 10 for igniting the gas in the combustion chamber 40.
In some embodiments of the present invention, referring to fig. 2 and 4, the pure oxygen burner further comprises a high temperature flue gas outlet channel 90, the high temperature flue gas outlet channel 90 communicating the combustion chamber 40 with an external heat exchange device.
In some embodiments of the present invention, referring to fig. 2 and 4, the oxy-fuel burner further comprises a thermal mass 20, the thermal mass 20 being mounted within the combustion chamber 40, the thermal mass 20 being a heat storage device inside the combustion chamber 40.
Specifically, the heat accumulator 20 may be a ceramic heat accumulator. The heat storage or release by the heat accumulator 20 provided in the combustion chamber 40 also serves to stabilize the combustion in the combustion chamber and to maintain the temperature in the combustion chamber stable.
In some embodiments of the present invention, referring to fig. 4, the thermal mass 20 is mounted on the integrated mixture inlet passage component 70 above the mixture injector 7040.
By arranging the heat accumulator 20 to be arranged on the comprehensive mixed gas inlet channel part 70 and above the mixed gas spray head 7040, the heat accumulator 20 is ensured to be close to the mixed gas spray head 7040, and combustion distribution is not influenced.
When the solid oxide fuel cell system is in a starting state and an emergency state, natural gas and air enter the pure oxygen combustor to serve as fuel of the pure oxygen combustor; when the system is in a stable operation state, oxygen, carbon dioxide and the stack tail gas of the solid oxide fuel cell enter the pure oxygen combustor to be used as the fuel of the pure oxygen combustor; and in different stages of system starting or stable operation, high-temperature flue gas generated by combustion of the pure oxygen combustor is led to other heat exchange devices of the solid oxide fuel cell system and is used for providing heat for the system.
The utility model provides a thinking and method of pure oxygen combustor for solid oxide fuel cell system specifically realize this technical scheme's method and way a lot, it is above only the utility model discloses a preferred embodiment should point out, to ordinary technical personnel in this technical field, do not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements and moist decorations should also be regarded as the utility model discloses a protection scope. All the components not specified in the present embodiment can be realized by the prior art.
Claims (10)
1. A pure oxygen burner for a solid oxide fuel cell system, comprising a circulating oxygen chamber (50), a combustion chamber (40), an oxygen inlet conduit (8010), a carbon dioxide inlet conduit (8020) and a comprehensive mixed gas inlet passage member (70); the circulating oxygen chamber (50) is positioned outside the combustion chamber (40) and is communicated with the combustion chamber (40), and heat exchange is carried out between the combustion chamber (40) and the circulating oxygen chamber (50) for cooling the combustion chamber (40); the circulating oxygen chamber (50) is communicated with the oxygen inlet pipeline (8010) and the carbon dioxide inlet pipeline (8020); the comprehensive mixed gas inlet channel part (70) is communicated with the combustion chamber (40), and natural gas, air and stack tail gas enter the combustion chamber (40) through the comprehensive mixed gas inlet channel part (70).
2. The pure oxygen burner for the solid oxide fuel cell system as claimed in claim 1, wherein the combustion chamber (40) comprises a first cylinder (4010) and a premixed gas orifice plate (4020) connected to the bottom opening of the first cylinder (4010), the circulating oxygen chamber (50) comprises a second cylinder (5010) coaxially arranged outside the first cylinder (4010) and a circulating oxygen chamber bottom plate (5020) hermetically connected to the bottom opening of the second cylinder (5010), and the combustion chamber (40) is communicated with the circulating oxygen chamber (50) through the premixed gas orifice plate (4020).
3. The pure oxygen burner for the solid oxide fuel cell system as claimed in claim 2, wherein the oxygen inlet duct (8010) and the carbon dioxide inlet duct (8020) are both in communication with the second barrel (5010), respectively, an axis of the oxygen inlet duct (8010) and an axis of the carbon dioxide inlet duct (8020) are both tangential to a central cylindrical plane located between the second barrel (5010) and the combustion chamber (40), respectively, and a position of the oxygen inlet duct (8010) is deviated from a position of the carbon dioxide inlet duct (8020) in a circumferential direction of the second barrel (5010).
4. The pure oxygen burner for the solid oxide fuel cell system as claimed in claim 3, wherein the integrated mixed gas inlet passage part (70) comprises a natural gas inlet passage (7010), an air inlet passage (7020), a stack tail gas inlet passage (7030) and a mixed gas injector (7040), and the mixed gas injector (7040) is communicated with the natural gas inlet passage (7010), the air inlet passage (7020) and the stack tail gas inlet passage (7030); the mixed gas injector (7040) is located within the combustion chamber (40).
5. The pure oxygen burner for the solid oxide fuel cell system according to claim 4, wherein the natural gas inlet channel (7010), the air inlet channel (7020) and the stack tail gas inlet channel (7030) are located between the premixed gas orifice plate (4020) and the circulating oxygen chamber bottom plate (5020).
6. The pure oxygen burner for the solid oxide fuel cell system as claimed in claim 5, wherein the second barrel (5010) is provided with a first communication hole (5011), a second communication hole (5012), and a third communication hole (5013), the first communication hole (5011) is communicated with the natural gas feed passage (7010), the second communication hole (5012) is communicated with the air feed passage (7020), and the third communication hole (5013) is communicated with the stack off-gas feed passage (7030).
7. The pure oxygen burner for the solid oxide fuel cell system according to claim 6, further comprising a burning torch sleeve (10), wherein one end of the burning torch sleeve (10) is located in the combustion chamber (40), and the other end of the burning torch sleeve passes through the premixed gas hole plate (4020) to communicate with the circulating oxygen chamber bottom plate (5020) for enabling the burning torch to extend into the combustion chamber (40) through the inside of the burning torch sleeve (10).
8. The pure oxygen burner for the solid oxide fuel cell system as claimed in claim 7, further comprising a high temperature flue gas outlet channel (90), wherein the high temperature flue gas outlet channel (90) communicates the combustion chamber (40) with an external heat exchange device.
9. A solid oxide fuel cell system oxy-burner as claimed in claim 8, further comprising a thermal mass (20), the thermal mass (20) being mounted in the combustion chamber (40).
10. A pure oxygen burner for a solid oxide fuel cell system in accordance with claim 9, wherein the heat accumulator (20) is installed on the integrated mixture inlet passage part (70) above the mixture nozzle (7040).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222723248.3U CN218178881U (en) | 2022-10-14 | 2022-10-14 | Pure oxygen combustor for solid oxide fuel cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222723248.3U CN218178881U (en) | 2022-10-14 | 2022-10-14 | Pure oxygen combustor for solid oxide fuel cell system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218178881U true CN218178881U (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222723248.3U Active CN218178881U (en) | 2022-10-14 | 2022-10-14 | Pure oxygen combustor for solid oxide fuel cell system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218178881U (en) |
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2022
- 2022-10-14 CN CN202222723248.3U patent/CN218178881U/en active Active
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