Solid oxide fuel cell and exhaust gas recycling system

Abstract

The application relates to a solid oxide fuel cell and a tail gas circulation treatment system, the solid oxide fuel cell comprising a stack reactor, a fuel delivery system, an air delivery system and the tail gas circulation treatment system, the fuel delivery system being communicated with the stack reactor, the air delivery system being communicated with the stack reactor, the tail gas circulation treatment system being connected with the stack reactor and the fuel delivery system and being connected with the stack reactor and the air delivery system, the tail gas circulation treatment system receiving tail gas discharged from the stack reactor, a part of cathode and anode tail gas being combusted to generate high-temperature flue gas which flows to the fuel delivery system and other devices, so that heat source is provided for the fuel delivery system, the utilization rate of heat energy of the solid oxide fuel cell is improved, another part of the tail gas generated by the stack reactor re-enters the stack reactor, the circulation utilization of the tail gas is realized, the tail gas circulation treatment system regulates and controls the flow of the tail gas generated by the stack reactor, and optimal power generation efficiency and overall thermal efficiency are obtained.

Description

Technical Field

[0001] This invention relates to the field of stationary oxide fuel cell technology, and more specifically, to a solid oxide fuel cell and an exhaust gas recirculation system. Background Technology

[0002] Solid oxide fuel cells (SOFCs) consist of a burner and a stack. Typically, the burner is directly connected to the stack, and the exhaust gases from the burner and the stack's cathode and anode react directly. However, this method results in excessively high burner outlet temperatures. If the stack's fuel utilization rate is low, the burner outlet temperature can even reach over 1200°C. This leads to excessively high temperatures throughout the SOFC, increasing the material requirements and reducing its lifespan and safety. Furthermore, direct combustion of cathode and anode exhaust gases prevents sufficient recycling of the exhaust gases, resulting in low fuel efficiency and a significant amount of unused thermal energy, hindering the efficient and long-term operation of the stack. Summary of the Invention

[0003] This invention provides a solid oxide fuel cell that recovers and processes the exhaust gas emitted from the cathode and anode of the fuel cell stack, thereby achieving the recycling of the exhaust gas, improving the utilization rate of thermal energy in the solid oxide fuel cell, and enhancing the power generation efficiency and thermal efficiency of the solid oxide fuel cell.

[0004] On one hand, the present invention provides a solid oxide fuel cell, comprising: a stack reactor, including a fuel input end, an air input end, an anode exhaust gas discharge end, and a cathode exhaust gas discharge end; a fuel delivery system connected to the fuel input end; an air delivery system connected to the air input end; and an exhaust gas recirculation system connected to the anode exhaust gas discharge end and the fuel delivery system, and connected to the cathode exhaust gas discharge end and the air delivery system.

[0005] In some optional embodiments, the exhaust gas recirculation treatment system includes a controller, an anode exhaust gas treatment system, and a cathode exhaust gas treatment system. The controller is electrically connected to the anode exhaust gas treatment system, the anode exhaust gas treatment system, and the fuel cell stack reactor, respectively. The anode exhaust gas treatment system is connected to the anode exhaust gas emission terminal and the fuel delivery system, and the cathode exhaust gas treatment system is connected to the cathode exhaust gas emission terminal and the air delivery system.

[0006] In some optional embodiments, the anode tail gas treatment system includes a first gas diversion component, a heat recovery component, and a gas-liquid separation component. The first gas diversion component is electrically connected to the controller and is connected to the anode tail gas emission end of the battery reactor. The gas-liquid separation component is connected to the first gas diversion component and the fuel delivery system, respectively. The heat recovery component is connected to the first gas diversion component and the fuel delivery system, respectively.

[0007] In some optional embodiments, the first gas diversion component is a gas splitter, which is connected to the anode tail gas emission end and the heat recovery component.

[0008] In some alternative embodiments, the heat recovery component includes a burner that is in communication with the fuel delivery system.

[0009] In some alternative embodiments, the gas-liquid separation component includes a gas-liquid separator and an ejector, the gas-liquid separator being connected to the gas distributor, the gas-liquid separator being connected to the ejector, and the ejector being connected to the fuel delivery system.

[0010] In some alternative embodiments, the fuel delivery system includes a fuel compressor, a steam generator, an integrator, and a fuel preheater. The steam generator is connected to the integrator, the integrator is connected to the fuel preheater, the fuel preheater is connected to the heat recovery unit, and the fuel presetter is connected to the fuel input terminal. The fuel compressor is connected to the ejector, the ejector is connected to the integrator, and the steam generator is connected to the gas-liquid separator.

[0011] In some optional embodiments, the cathode exhaust gas treatment system includes a second gas diversion component and an oxygen separation component. The second gas diversion component is electrically connected to the controller and is connected to the cathode exhaust gas emission end and the heat recovery component of the battery reactor, respectively. The oxygen separation component is connected to the air delivery system and the heat recovery component, respectively.

[0012] In some optional embodiments, the second gas splitting component is a gas splitter connected to the cathode exhaust gas outlet, the heat recovery component, and the oxygen separation assembly.

[0013] In some alternative embodiments, the oxygen separation assembly includes an oxygen separator and an ejector, the oxygen separator being connected to the ejector, the oxygen separator being connected to the gas splitter, the oxygen separator being connected to the heat recovery component, and the ejector being connected to the air delivery system.

[0014] In some alternative embodiments, the air delivery system includes an air compressor and an air presetter, the air compressor being connected to the ejector, the ejector being connected to the air presetter, the air presetter being connected to the air input terminal, and the air presetter being connected to the heat recovery component.

[0015] On the other hand, the present invention provides an exhaust gas recirculation treatment system, which is the exhaust gas recirculation treatment system described in any of the above claims.

[0016] Compared with the prior art, the present invention has the following technical advantages:

[0017] This invention provides a solid oxide fuel cell, comprising a stack reactor, a fuel delivery system, an air delivery system, and an exhaust gas recirculation system. The stack reactor includes a fuel input end, an air input end, an anode exhaust gas discharge end, and a cathode exhaust gas discharge end. The fuel delivery system is connected to the fuel input end, and the air delivery system is connected to the air input end. The exhaust gas recirculation system connects the anode exhaust gas discharge end and the fuel delivery system, and connects the cathode exhaust gas discharge end and the air delivery system. The exhaust gas recirculation system receives exhaust gases discharged from the cathode and anode ends of the stack reactor. A portion of the cathode and anode exhaust gases are combusted, and the resulting high-temperature flue gas flows to the fuel delivery system and other equipment, thereby providing a heat source for the fuel delivery system and improving the thermal energy utilization rate of the solid oxide fuel cell. Another portion of the exhaust gases generated after the reaction at the cathode and anode ends re-enter the stack reactor to further participate in power generation, realizing the recycling of exhaust gases. The exhaust gas recirculation system regulates the flow rate of the exhaust gases at the cathode and anode ends of the stack reactor to control the thermoelectric ratio of the entire solid oxide fuel cell, thereby obtaining optimal power generation efficiency and overall thermal efficiency. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic diagram of the structure of a solid oxide fuel cell according to an embodiment of the present invention is shown.

[0020] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0021] 1-Controller; 2-First gas splitting component; 3-Heat recovery component; 41-Gas-liquid separator; 42-First ejector; 51-Fuel compressor; 52-Steam generator; 53-Integrator; 54-Fuel preheater; 6-Second gas splitting component; 7-Oxygen separator; 8-Second ejector; 91-Air compressor; 92-Air presetter. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0024] Solid oxide fuel cells (SOFCs) consist of a burner and a stack. Typically, the burner is directly connected to the stack, and the exhaust gases from the burner and the stack's cathode and anode react directly. However, this method results in excessively high burner outlet temperatures. If the stack's fuel utilization rate is low, the burner outlet temperature can even reach over 1200°C. This leads to excessively high temperatures throughout the SOFC, increasing the material requirements and reducing its lifespan and safety. Furthermore, direct combustion of cathode and anode exhaust gases prevents sufficient recycling of the exhaust gases, resulting in low fuel efficiency and a significant amount of unused thermal energy, hindering the efficient and long-term operation of the stack.

[0025] This invention provides a solid oxide fuel cell that recovers and processes the exhaust gas emitted from the cathode and anode of the fuel cell stack, thereby achieving the recycling of the exhaust gas, improving the utilization rate of thermal energy in the solid oxide fuel cell, and enhancing the power generation efficiency and thermal efficiency of the solid oxide fuel cell.

[0026] This application provides a solid oxide fuel cell, which includes: a stack reactor, including a fuel input end, an air input end, an anode exhaust gas discharge end, and a cathode exhaust gas discharge end; a fuel delivery system connected to the fuel input end; an air delivery system connected to the air input end; and an exhaust gas recirculation system connected to the anode exhaust gas discharge end and the fuel delivery system, and connected to the cathode exhaust gas discharge end and the air delivery system.

[0027] Specifically, a solid oxide fuel cell includes a stack reactor, a fuel delivery system, an air delivery system, and an exhaust gas recirculation system. The stack reactor includes a fuel input end, an air input end, an anode exhaust gas discharge end, and a cathode exhaust gas discharge end. The fuel delivery system is connected to the fuel input end, and the air delivery system is connected to the air input end. The exhaust gas recirculation system connects the anode exhaust gas discharge end and the fuel delivery system, and connects the cathode exhaust gas discharge end and the air delivery system. The exhaust gas recirculation system receives the exhaust gas discharged from the cathode and anode ends of the stack reactor. A portion of the cathode and anode exhaust gas is burned, and the high-temperature flue gas generated flows to the fuel delivery system and other equipment to provide a heat source for the fuel delivery system, thereby improving the utilization rate of thermal energy in the solid oxide fuel cell. Another portion of the exhaust gas generated after the reaction at the cathode and anode ends re-enters the stack reactor to further participate in power generation, realizing the recycling of exhaust gas. The exhaust gas recirculation system regulates the flow rate of the exhaust gas at the cathode and anode ends of the stack reactor to control the thermoelectric ratio of the entire solid oxide fuel cell, thereby obtaining the optimal power generation efficiency and overall thermal efficiency.

[0028] In some optional embodiments, the exhaust gas recirculation treatment system includes a controller 1, an anode exhaust gas treatment system, and a cathode exhaust gas treatment system. The controller 1 is electrically connected to the anode exhaust gas treatment system, the anode exhaust gas treatment system, and the fuel cell stack reactor, respectively. The anode exhaust gas treatment system is connected to the anode exhaust gas emission end and the fuel delivery system, and the cathode exhaust gas treatment system is connected to the cathode exhaust gas emission end and the air delivery system.

[0029] Specifically, the anode exhaust gas of the fuel cell reactor is discharged. The anode exhaust gas treatment system receives the exhaust gas from the anode exhaust gas terminal, treats it, and reuses it in the fuel cell reactor. This increases the temperature of the air and reformate entering the reactor, reduces the power consumption of the fuel delivery system, and lowers the system cost. The cathode exhaust gas treatment system receives the exhaust gas from the cathode exhaust gas terminal, treats it, and reuses it in the fuel cell reactor. This increases the temperature of the air and reformate entering the reactor, reducing the power consumption of the air delivery system.

[0030] Furthermore, controller 1 is electrically connected to the anode tail gas treatment system, the anode tail gas treatment system, and the fuel cell stack reactor, respectively. Controller 1 can adjust the tail gas flow rate according to the tail gas temperature produced by the fuel cell stack reactor, thereby maximizing the thermal efficiency and power generation efficiency of the fixed oxide fuel cell. High-temperature tail gas is discharged from the anode tail gas emission end and the cathode tail gas emission end. The high-temperature tail gas generates heat energy after combustion, and the heat is recovered through the anode tail gas treatment system and the cathode tail gas treatment system, thereby improving the thermal efficiency of the system and reducing thermal pollution.

[0031] In some optional embodiments, the anode tail gas treatment system includes a first gas diversion component 2, a heat recovery component 3, and a gas-liquid separation component. The first gas diversion component 2 is electrically connected to the controller 1 and is connected to the anode tail gas emission end of the battery reactor. The gas-liquid separation component is connected to the first gas diversion component 2 and the fuel delivery system, respectively. The heat recovery component 3 is connected to the first gas diversion component 2 and the fuel delivery system, respectively.

[0032] In some optional embodiments, the first gas diversion component 2 is a gas splitter, which is connected to the anode tail gas emission end and the heat recovery component 3.

[0033] In some alternative embodiments, the heat recovery component 3 includes a burner that is in communication with the fuel delivery system.

[0034] In some optional embodiments, the gas-liquid separation component includes a gas-liquid separator 41 and a first ejector 42. The gas-liquid separator 41 is connected to the first gas diversion component 2, the gas-liquid separator 41 is connected to the first ejector 42, and the first ejector 42 is connected to the fuel delivery system.

[0035] In some alternative embodiments, the fuel delivery system includes a fuel compressor 51, a steam generator 52, an integrator 53, and a fuel preheater 54. The steam generator 52 is connected to the integrator 53, the integrator 53 is connected to the fuel preheater 54, the fuel preheater 54 is connected to the heat recovery unit 3, and the fuel presetter 54 is connected to the fuel input end. The fuel compressor 51 is connected to the first ejector 42, the first ejector 42 is connected to the integrator 53, and the steam generator 52 is connected to the gas-liquid separator 41.

[0036] Specifically, the first gas splitting component 2 regulates the tail gas splitting flow rate based on the temperature of the tail gas discharged from the anode tail gas emission end of the fuel cell stack reactor, which can maximize the thermal efficiency and power generation efficiency of the solid oxide fuel cell. The heat recovery component 3 is a burner. The tail gas discharged from the anode tail gas emission end enters the burner and merges with part of the anode tail gas for combustion reaction, providing heat energy for the fuel delivery system.

[0037] The exhaust gas discharged from the anode tail gas outlet is connected to the first gas diversion component 2, which is connected to both the burner and the gas-liquid separation component. The anode tail gas outlet discharges high-temperature exhaust gas containing H2, CO, CO2, and water vapor. After separation by the first gas diversion component 2, a portion of the gas enters the gas-liquid separation component, where the separated water returns to the steam generator 52. The separated gas phase components, along with fresh natural gas and water vapor, are introduced into the integrator 53 for reaction. After being heated by the fuel preheater 54, the gas enters the fuel stack reactor, achieving segmented recycling of the anode tail gas. The remaining portion of the anode tail gas directly enters the burner for combustion, providing heat energy to the fuel preheater 54. The remaining heat is discharged into the flue gas recovery system.

[0038] The anode exhaust of the fuel cell reactor discharges high-temperature exhaust gas, which is then split into two parts by a gas splitter. The first part of the anode exhaust gas enters the gas-liquid separator 41, where the separated water re-enters the steam generator 52. The separated gaseous components mix with the natural gas at the inlet and, along with high-temperature steam, re-enter the reformer 53 through the ejector to generate H2 reformed gas, which then enters the fuel cell reactor to participate in power generation. The second part of the high-temperature exhaust gas directly enters the burner and merges with the cathode exhaust gas for combustion, providing heat energy to the fuel preheater 54 and the air preheater in sequence.

[0039] In some optional embodiments, the cathode exhaust gas treatment system includes a second gas diversion component 6 and an oxygen separation component. The second gas diversion component 6 is electrically connected to the controller 1 and is connected to the cathode exhaust gas emission end of the battery reactor and the heat recovery component 3, respectively. The oxygen separation component is connected to the air delivery system and the heat recovery component 3, respectively.

[0040] In some optional embodiments, the second gas splitting component 6 is a gas splitter connected to the cathode tail gas emission end, the gas splitter connected to the heat recovery component 3, and the gas splitter connected to the oxygen separation component.

[0041] In some alternative embodiments, the oxygen separation assembly includes an oxygen separator 7 and a second ejector 8, the oxygen separator 7 being connected to the second ejector 8, the oxygen separator 7 being connected to the second gas diversion component 6, the oxygen separator 7 being connected to the heat recovery component 3, and the second ejector 8 being connected to the air delivery system.

[0042] Specifically, the cathode exhaust gas treatment system includes an oxygen separator 7, which contains an oxygen separation membrane. This membrane separates high-purity oxygen from the exhaust gas discharged from the cathode exhaust gas outlet, allowing it to be re-introduced into the cathode along with fresh air for power generation. The oxygen separator 7 prevents the direct introduction of cathode exhaust gas, thus avoiding a decrease in the oxygen partial pressure in the air entering the cathode and preventing a drop in the stack's output power, thereby improving power generation efficiency.

[0043] In some alternative embodiments, the air delivery system includes an air compressor 91 and an air presetter 92, the air compressor 91 being connected to a second ejector 8, the second ejector 8 being connected to the air presetter 92, the air presetter 92 being connected to an air input terminal, and the air presetter 92 being connected to a heat recovery component 3.

[0044] Specifically, the high-temperature exhaust gas emitted from the cathode is split into two parts by a gas splitter. The first part of the exhaust gas is separated into a pure oxygen stream and an oxygen-deficient air stream by an oxygen separator 7. The pure oxygen stream merges with the ambient temperature fresh air and, after passing through an air preheater 92, re-enters the fuel cell stack reactor. The oxygen-deficient air enters the burner to participate in the combustion reaction. The introduction of high-temperature cathode exhaust gas effectively increases the temperature of the air entering the fuel cell stack reactor, reducing not only the power consumption of the blower but also the power consumption of the air preheater, thereby reducing the power consumption of the solid oxide fuel cell. The remaining second part of the high-temperature exhaust gas enters the burner and merges with the exhaust gas split from the anode, undergoing a combustion reaction to generate heat. This heat then passes sequentially through a fuel preheater 54 and an air preheater to provide thermal energy to the air delivery system.

[0045] A portion of the exhaust gas discharged from the cathode tail gas outlet is combined in the burner. The high-temperature flue gas generated by combustion sequentially enters the fuel preheater 54 and the air preheater to provide heat energy for the equipment. Excess heat enters the flue gas recovery system. By passing the high-temperature flue gas generated by combustion through the air preheater 92 and the fuel preheater 54, a large amount of heat can be recovered, which can heat the reformed gas and air entering the solid oxide fuel cell and bring them to the required operating temperature, thus efficiently utilizing the heat released by the cathode and anode tail gases.

[0046] In some alternative embodiments, the exhaust gas recirculation system is any of the exhaust gas recirculation systems mentioned above.

[0047] Specifically, the exhaust gas recirculation system connects the anode exhaust gas discharge end to the fuel delivery system and the cathode exhaust gas discharge end to the air delivery system. The exhaust gas recirculation system receives the exhaust gas discharged from the cathode and anode ends of the fuel cell stack reactor. A portion of the cathode and anode exhaust gas is burned, and the resulting high-temperature flue gas flows to the fuel delivery system and other equipment to provide a heat source for the fuel delivery system, thereby improving the utilization rate of thermal energy in the solid oxide fuel cell. The other portion of the exhaust gas generated after the reaction at the cathode and anode ends re-enters the fuel cell stack reactor to further participate in power generation, realizing the recycling of exhaust gas. The exhaust gas recirculation system regulates the flow rate of the exhaust gas at the cathode and anode ends of the fuel cell stack reactor to control the thermoelectric ratio of the entire solid oxide fuel cell, thereby obtaining the optimal power generation efficiency and overall thermal efficiency.

[0048] In this invention, the term "multiple" refers to at least two or more, unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A solid oxide fuel cell, characterized in that, include: The fuel cell reactor includes a fuel input end, an air input end, an anode tail gas emission end, and a cathode tail gas emission end; A fuel delivery system is connected to the fuel input terminal; An air delivery system is connected to the air input terminal; The exhaust gas recirculation system connects the anode exhaust gas emission terminal and the fuel delivery system, and connects the cathode exhaust gas emission terminal and the air delivery system.

2. The solid oxide fuel cell according to claim 1, characterized in that, The exhaust gas recirculation treatment system includes a controller (1), an anode exhaust gas treatment system, and a cathode exhaust gas treatment system. The controller (1) is electrically connected to the anode exhaust gas treatment system, the anode exhaust gas treatment system, and the fuel cell reactor, respectively. The anode exhaust gas treatment system is connected to the anode exhaust gas emission end and the fuel delivery system, and the cathode exhaust gas treatment system is connected to the cathode exhaust gas emission end and the air delivery system.

3. The solid oxide fuel cell according to claim 2, characterized in that, The anode tail gas treatment system includes a first gas diversion component (2), a heat recovery component (3), and a gas-liquid separation component. The first gas diversion component (2) is electrically connected to the controller (1) and is connected to the anode tail gas emission end of the battery reactor. The gas-liquid separation component is connected to the first gas diversion component (2) and the fuel delivery system, respectively. The heat recovery component (3) is connected to the first gas diversion component (2) and the fuel delivery system, respectively.

4. The solid oxide fuel cell according to claim 3, characterized in that, The first gas splitting component (2) is a gas splitter, which is connected to the anode tail gas emission end and the heat recovery component (3).

5. The solid oxide fuel cell according to claim 4, characterized in that, The heat recovery component (3) includes a burner that is connected to the fuel delivery system.

6. The solid oxide fuel cell according to claim 5, characterized in that, The gas-liquid separation component includes a gas-liquid separator (41) and a first ejector (42). The gas-liquid separator (41) is connected to the first gas diversion component (2), and the gas-liquid separator (41) is connected to the first ejector (42). The first ejector (42) is connected to the fuel delivery system.

7. The solid oxide fuel cell according to claim 6, characterized in that, The fuel delivery system includes a fuel compressor (51), a steam generator (52), an integrator (53), and a fuel preheater (54). The steam generator (52) is connected to the integrator (53), the integrator (53) is connected to the fuel preheater (54), the fuel preheater (54) is connected to the heat recovery unit (3), and the fuel presetter (54) is connected to the fuel input end. The fuel compressor (51) is connected to the first ejector (42), and the first ejector (42) is connected to the integrator (53); The steam generator (52) is connected to the gas-liquid separator (41).

8. The solid oxide fuel cell according to claim 2, characterized in that, The cathode tail gas treatment system includes a second gas diversion component (6) and an oxygen separation component. The second gas diversion component (6) is electrically connected to the controller (1). The second gas diversion component (6) is connected to the cathode tail gas emission end and the heat recovery component (3) of the battery reactor, respectively. The oxygen separation component is connected to the air delivery system and the heat recovery component (3), respectively.

9. The solid oxide fuel cell according to claim 8, characterized in that, The second gas splitting component (6) is a gas splitter, which is connected to the cathode tail gas discharge end, the heat recovery component (3), and the oxygen separation component.

10. The solid oxide fuel cell according to claim 9, characterized in that, The oxygen separation assembly includes an oxygen separator (7) and a second ejector (8). The oxygen separator (7) is connected to the second ejector (8), the oxygen separator (7) is connected to the second gas diversion component (6), the oxygen separator (7) is connected to the heat recovery component (3), and the second ejector (8) is connected to the air delivery system.

11. The solid oxide fuel cell according to claim 10, characterized in that, The air delivery system includes an air compressor (91) and an air presetter (92). The air compressor (91) is connected to the second ejector (8), the second ejector (8) is connected to the air presetter (92), the air presetter (92) is connected to the air input terminal, and the air presetter (92) is connected to the heat recovery component (3).

12. A tail gas recirculation treatment system, characterized in that, The exhaust gas recirculation treatment system as described in any one of claims 1-11.

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