Integrated exhaust and fuel treatment components for solid oxide fuel cell systems

Abstract

The present invention relates to an integrated exhaust and fuel treatment assembly for a solid oxide fuel cell system, comprising an outer tube and a combustion tube, the combustion tube being disposed within the outer tube. A uniform distribution tube is provided in the middle of the top wall of the combustion tube, the inner wall of the uniform distribution tube being provided with a first uniform distribution plate and a second uniform distribution plate, each of which being provided with uniformly distributed holes. The top wall of the combustion tube is provided with a plurality of oblique flow holes, which are distributed around the uniform distribution tube. The outer wall of the combustion tube is provided with an annular baffle, the outer edge of which is connected to the inner wall of the outer tube. The outer wall of the combustion tube is provided with a main cathode exhaust gas inlet, a supplementary cathode exhaust gas inlet, and a cooling and mixing inlet, the main cathode exhaust gas inlet, the supplementary cathode exhaust gas inlet, and the cooling and mixing inlet being arranged at increasing distances from the uniform distribution tube. The present invention can more thoroughly recover the heat energy of the cathode and anode exhaust gases, simplify the structure of the solid oxide fuel cell system, and improve the overall efficiency of the solid oxide fuel cell system.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas and fuel treatment of solid oxide fuel cells (SOFCs), and in particular to an integrated waste gas and fuel treatment structure for a solid oxide fuel cell system. Background Art

[0002] Solid oxide fuel cell (SOFC) exhaust and fuel processing equipment is designed to improve energy efficiency while reducing harmful emissions, that is, to achieve the following two goals:

[0003] 1. Waste gas energy recovery: The waste gas discharged from the SOFC stack has a high temperature. This energy can be recovered through devices such as heat exchangers and used for heating or other thermodynamic processes, thereby improving the overall energy efficiency of the system.

[0004] 2. Exhaust gas purification: The exhaust gas treatment device needs to effectively remove pollutants from the exhaust gas discharged by the fuel cell stack, including but not limited to incompletely burned fuel components, nitrogen oxides (NOx), sulfides (SOx), etc. This requires the use of specific catalysts to convert these pollutants and reduce the concentration of pollutants at the system outlet to meet the emission standard concentration.

[0005] The problems and shortcomings of the existing technologies for exhaust gas and fuel treatment devices of solid oxide fuel cells (SOFCs) mainly include the following aspects:

[0006] 1. Thermal management: SOFC systems operate in high-temperature environments, and the exhaust gases from the anode and cathode are very hot. Effectively managing and recovering this heat while preventing thermal stress from damaging system components is currently a major challenge.

[0007] 2. Difficulty in system integration: The exhaust gas treatment system needs to be closely integrated with the fuel treatment system, which requires the compatibility and coordination of the two to be considered in the design, thus increasing the difficulty of system integration.

[0008] 3. Multiple components: SOFC systems are typically composed of multiple subsystems, including fuel supply systems, air supply systems, thermal management systems, fuel processing systems, and exhaust gas treatment systems. This results in a complex system structure, requiring more components to implement various functions, increasing system complexity and cost.

[0009] 4. Low efficiency: Although SOFCs inherently have high power conversion efficiency, in actual applications, due to connection losses between components within the system, heat loss, and other non-ideal factors, the overall efficiency may decrease. This loss may be particularly significant when the exhaust gas treatment and fuel processing systems are not well optimized.

[0010] 5. Low space utilization: The complex exhaust gas treatment system and fuel treatment system take up a large space in SOFC. Summary of the Invention

[0011] The purpose of the present invention is to provide an integrated exhaust gas and fuel treatment structure for a solid oxide fuel cell system, which can more thoroughly recover the heat energy of the two, simplify the structure of the solid oxide fuel cell system, and improve the overall efficiency of the solid oxide fuel cell system.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] The exhaust and fuel integrated processing assembly of the solid oxide fuel cell system includes an outer tube and a combustion tube. The combustion tube is arranged in the outer tube. A uniform distribution tube is penetrated in the middle of the top wall of the combustion tube. The inner wall of the uniform distribution tube is provided with a first uniform distribution plate and a second uniform distribution plate. The first uniform distribution plate and the second uniform distribution plate are both provided with uniform distribution holes. The top wall of the combustion tube is provided with multiple flow-around inclined holes, and the multiple flow-around inclined holes are distributed around the uniform distribution tube. The outer wall of the combustion tube is provided with an annular baffle. The outer edge of the annular baffle is connected to the inner wall of the outer tube. The outer wall of the combustion tube is provided with a cathode exhaust main air inlet, a cathode exhaust supplementary air inlet, and a cooling mixing air inlet. The distances between the cathode exhaust gas main air inlet, the cathode exhaust gas supplementary air inlet and the cooling mixing air inlet and the uniform distribution tube increase successively. The height position of the annular baffle is lower than the cooling mixing air inlet. An igniter is provided between the cathode exhaust gas main air inlet and the second-layer uniform distribution plate. An outer cover is provided on the outer wall of the outer tube. The upper part of the inner cavity of the outer cover is divided into a fuel air inlet chamber and a water inlet chamber. The fuel air inlet chamber is provided with a fuel air inlet, and the water inlet chamber is provided with a water inlet. Heat exchange fins are provided in the fuel air inlet chamber, and porous metal is provided in the water inlet chamber. A mixing vane is provided on the lower part of the outer wall of the outer tube, and a mixed gas outlet is provided on the lower part of the outer cover.

[0014] Specifically, the angle between the central axis of the flow-around inclined hole and the top wall of the combustion tube is 25°-45°, and the projection of the central axis of the flow-around inclined hole on the top wall of the combustion tube is along the circumferential tangent direction.

[0015] Specifically, the first-layer uniformly distributed plate is provided with a row of annularly distributed first-layer uniformly distributed holes, and the second-layer uniformly distributed plate is provided with a row of annularly distributed second-layer uniformly distributed holes. The number of the first-layer uniformly distributed holes is less than that of the second-layer uniformly distributed holes, and the spacing between the first-layer uniformly distributed holes is larger than that of the second-layer uniformly distributed holes.

[0016] Specifically, the diameter of the cathode exhaust gas main inlet hole is larger than the cathode exhaust gas supplementary inlet hole and the cooling mixing inlet hole.

[0017] Specifically, two symmetrical notches are provided on the upper part of the outer cover, and partition strips are welded at the notches. The two partition strips divide the upper part of the inner cavity of the outer cover into a fuel inlet cavity and a water inlet cavity, and the igniter is arranged through one of the partition strips.

[0018] Specifically, an arc-shaped air equalizing plate is provided on the upper part of the fuel intake cavity, and the arc-shaped air equalizing plate is provided with air equalizing holes. The arc-shaped air equalizing plate divides the upper part of the fuel intake cavity into an intake equalizing cavity, and the fuel intake port is provided in the intake equalizing cavity.

[0019] Specifically, the cross section of the heat exchange fin is in the shape of a square wave signal, multiple inner walls of the heat exchange fin are in contact with the outer wall of the outer cylinder, and multiple outer walls of the heat exchange fin are in contact with the inner wall of the outer cover.

[0020] Specifically, the material of the heat exchange fins is aluminum alloy, the thickness of the heat exchange fins is 0.3mm-0.5mm, the circumferential pitch of the heat exchange fins is 2.3mm-2.7mm, and the radial height of the heat exchange fins is 7mm-9mm.

[0021] Specifically, an arc-shaped liquid balancing plate is provided on the upper part of the water inlet cavity, and the arc-shaped liquid balancing plate is provided with a liquid balancing hole. The arc-shaped liquid balancing plate divides the upper part of the water inlet cavity into a water inlet balancing cavity, and the water inlet is provided in the water inlet balancing cavity.

[0022] Specifically, the porous metal is provided with a plurality of circumferential holes, a plurality of radial holes and a plurality of vertical holes, and the corresponding circumferential holes, radial holes and vertical holes are connected inside the porous metal.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The anode exhaust gas (mainly hydrogen, carbon monoxide, and methane) and the cathode exhaust gas (mainly nitrogen and oxygen) are fully mixed in the above-mentioned combustion area and then ignited, so that the two are fully burned, thereby releasing the chemical energy of the anode exhaust gas and the cathode exhaust gas, and thus more thoroughly recovering the heat energy of the two;

[0025] 2. The anode exhaust gas (mainly hydrogen, carbon monoxide, and methane) and the cathode exhaust gas (mainly nitrogen and oxygen) are fully mixed and ignited in the above-mentioned combustion area before being discharged, which can reduce the emission concentration of the anode exhaust gas and the cathode exhaust gas, and is beneficial to environmental protection;

[0026] 3. Heat exchange fins and porous metal are set on both sides of the outer wall of the outer tube. The heat exchange fins exchange heat with the fuel gas (mainly methane) flowing through. The porous metal exchanges heat with the deionized water flowing through, causing the ionized water to evaporate into water vapor. The heated fuel gas and water vapor reach the reaction conditions and react to form hydrogen and carbon monoxide. This process absorbs and utilizes the heat of the anode exhaust gas and the cathode exhaust gas themselves, as well as the heat generated by the combustion of the two, to reduce the temperature of the mixed gas discharged from the lower end of the combustion tube. Furthermore, the cathode exhaust gas entering through the cooling mixing air inlet is mixed with the high-temperature gas after combustion, which also plays a role in reducing the temperature of the mixed gas discharged from the lower end of the combustion tube. By reducing the temperature of the exhaust gas, the damage to the system components caused by thermal stress can be reduced;

[0027] 4. Integrating the anode exhaust gas treatment system, cathode exhaust gas treatment system, and fuel treatment system can significantly reduce the original connection loss and heat loss, thereby greatly improving the overall efficiency of the solid oxide fuel cell (SOFC). It also greatly simplifies the system structure and significantly reduces its occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is an external view of the present invention;

[0030] Figure 2 A cutaway view of the present invention;

[0031] Figure 3 It is a partial perspective view of the present invention;

[0032] Figure 4 It is a cross-sectional view of the uniformly distributed cylinder;

[0033] Figure 5 This is a view of the top wall of the combustion tube.

[0034] In the picture:

[0035] 6. Ignition device; 8. Outer tube; 81. Mixing rotor; 10. Outer cover; 101. Mixed gas outlet; 102. Notch; 11. Heat exchange fin; 12. Fuel inlet chamber; 121. Fuel inlet; 122. Arc-shaped air equalizing plate; 123. Air inlet equalizing chamber; 13. Water inlet chamber; 131. Water inlet; 132. Arc-shaped liquid equalizing plate; 133. Water inlet equalizing chamber; 14. Distributing tube; 141. One-layer distributing plate; 142. Two-layer distributing plate; 16. Combustion tube; 161. Flow-around inclined hole; 162. Annular baffle; 17. Cathode exhaust main inlet; 18. Porous metal; 19. Cathode exhaust supplementary inlet; 20. Cooling mixing inlet; 27. Separator. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] See Figures 1 to 5The integrated exhaust and fuel processing assembly for a solid oxide fuel cell system includes an outer tube 8 and a combustion tube 16. The combustion tube 16 is disposed within the outer tube 8. A uniform distribution tube 14 is provided through the middle of the top wall of the combustion tube 16. The inner wall of the uniform distribution tube 14 is provided with a first uniform distribution plate 141 and a second uniform distribution plate 142, each of which is provided with uniform distribution holes.

[0038] The top wall of the combustion tube 16 is provided with multiple oblique flow holes 161, distributed around the uniform distribution tube 14. The outer wall of the combustion tube 16 is provided with an annular baffle 162, the outer edge of which is connected to the inner wall of the outer tube 8. The outer wall of the combustion tube 16 is provided with a cathode exhaust main inlet 17, a cathode exhaust supplementary inlet 19, and a cooling and mixing inlet 20. The distances between the cathode exhaust main inlet 17, the cathode exhaust supplementary inlet 19, and the cooling and mixing inlet 20 and the uniform distribution tube 14 increase in sequence. The annular baffle 162 is positioned lower than the cooling and mixing inlet 20.

[0039] An igniter 6 is provided between the cathode exhaust main inlet 17 and the second-layer uniform distribution plate 142. An outer cover 10 is provided on the outer wall of the outer tube 8. The upper portion of the inner cavity of the outer cover 10 is divided into a fuel inlet chamber 12 and a water inlet chamber 13. The fuel inlet chamber 12 is provided with a fuel inlet port 121. The water inlet chamber 13 is provided with a water inlet port 131. Heat exchange fins 11 are provided in the fuel inlet chamber 12. Porous metal 18 is provided in the water inlet chamber 13. A mixing vane 81 is provided on the lower portion of the outer wall of the outer tube 8. A mixed gas outlet 101 is provided at the lower portion of the outer cover 10.

[0040] Specifically, see Figure 5 The angle between the central axis of the flow oblique hole 161 and the top wall of the combustion tube 16 is 25°-45°, and the projection of the central axis of the flow oblique hole 161 on the top wall of the combustion tube 16 is along the circumferential tangent direction.

[0041] Specifically, see Figure 4 The first-layer uniformly distributed plate 141 is provided with a row of first-layer uniformly distributed holes in a circular shape, and the second-layer uniformly distributed plate 142 is provided with a row of second-layer uniformly distributed holes in a circular shape. The number of the first-layer uniformly distributed holes is less than that of the second-layer uniformly distributed holes, and the spacing between the first-layer uniformly distributed holes is larger than that of the second-layer uniformly distributed holes.

[0042] Specifically, see Figure 2 The aperture of the cathode exhaust gas main inlet hole 17 is larger than the cathode exhaust gas supplementary inlet hole 19 and the cooling mixing inlet hole 20.

[0043] Specifically, two symmetrical notches 102 are provided on the upper portion of the outer cover 10 ( Figure 1 and Figure 3 Only one of the gaps 102 is shown. A partition bar 27 is welded at the gap 102 . The two partition bars 27 divide the upper inner portion of the outer cover 10 into a fuel inlet chamber 12 and a water inlet chamber 13 . The igniter 6 is disposed through one of the partition bars 27 .

[0044] Specifically, see Figure 3 The upper portion of the fuel intake cavity 12 is provided with an arc-shaped air equalizing plate 122, which is provided with air equalizing holes. The arc-shaped air equalizing plate 122 divides the upper portion of the fuel intake cavity 12 into an intake equalizing cavity 123, and the fuel intake port 121 is provided in the intake equalizing cavity 123.

[0045] Specifically, see Figure 3 The cross section of the heat exchange fin 11 is in the shape of a square wave signal, and multiple inner walls of the heat exchange fin 11 are all in contact with the outer wall of the outer tube 8 , and multiple outer walls of the heat exchange fin 11 are all in contact with the inner wall of the outer cover 10 .

[0046] Specifically, see Figure 3 The heat exchange fins 11 are made of aluminum alloy, the thickness of the heat exchange fins 11 is 0.3mm-0.5mm, the circumferential pitch of the heat exchange fins 11 is 2.3mm-2.7mm, and the radial height of the heat exchange fins 11 is 7mm-9mm.

[0047] Specifically, see Figure 3 The upper portion of the water inlet cavity 13 is provided with an arc-shaped liquid balancing plate 132 with a liquid balancing hole. The arc-shaped liquid balancing plate 132 divides the upper portion of the water inlet cavity 13 into a water inlet balancing cavity 133 , and the water inlet 131 is provided in the water inlet balancing cavity 133 .

[0048] Specifically, see Figure 3 The porous metal 18 is provided with a plurality of circumferential holes, a plurality of radial holes and a plurality of vertical holes, and the corresponding circumferential holes, radial holes and vertical holes are connected inside the porous metal 18 (see Figure 2 ).

[0049] The working principle of the present invention is as follows:

[0050] See Figure 2 The anode exhaust gas (primarily hydrogen, carbon monoxide, and methane) enters from the upper opening of the uniform distribution tube 14, passes through the uniformly distributed holes provided on the first and second uniform distribution plates 141, 142, and then evenly enters the combustion tube 16. The cathode exhaust gas (primarily nitrogen and oxygen) enters from the upper opening of the outer tube 8, and enters the combustion tube 16 through the bypass inclined holes 161, the cathode exhaust gas main inlet hole 17, the cathode exhaust gas supplementary inlet hole 19, and the cooling and mixing inlet hole 20. Because the igniter 6 is located between the cathode exhaust gas main inlet hole 17 and the second uniform distribution plate 142, when the igniter 6 is ignited, the area where combustion primarily occurs (referred to as the combustion area) is the area between the cathode exhaust gas main inlet hole 17 and the second uniform distribution plate 142.

[0051] The cathode exhaust gas entering through the cathode exhaust main inlet 17 acts as a combustion aid for stable combustion in the combustion tube 16. The cathode exhaust gas enters through the bypass oblique hole 161, generating a swirl flow, allowing the cathode exhaust gas and the anode exhaust gas to quickly and thoroughly mix in the combustion area, ensuring more complete combustion. The cathode exhaust gas entering through the cathode exhaust supplementary inlet 19 is used to further react with the unburned anode exhaust gas, ensuring a more complete and thorough reaction, thereby reducing exhaust gas emissions at the outlet. The cathode exhaust gas entering through the cooling mixing inlet 20 mixes with the high-temperature gas after combustion, reducing the outlet temperature.

[0052] The mixed combustion of anode and cathode exhaust gases allows for more complete release of their chemical energy. To recover the heat from the high-temperature anode and cathode exhaust gases, as well as the combined heat from their combustion, an outer cover 10 is installed on the outer wall of the outer cylinder 8. Two dividing strips 27 divide the upper portion of the inner cavity of the outer cover 10 into a fuel inlet chamber 12 and a water inlet chamber 13.

[0053] Fuel gas (primarily methane) is fed into the inlet and uniformizing chamber 123 through the fuel inlet port 121. It then flows evenly through the uniformizing holes of the arc-shaped uniformizing plate 122 into the fuel inlet chamber 12. It then flows downward through the surfaces of the heat exchange fins 11 and into the lower portion of the inner chamber of the housing 10. The fuel gas absorbs heat as it flows through the heat exchange fins 11, increasing its temperature.

[0054] Deionized water enters the water-distributing chamber 133 through the water inlet 131 and flows through the distributing holes of the arc-shaped distributing plate 132 to the porous metal 18. The porous metal 18 is equipped with multiple circumferential holes, multiple radial holes, and multiple vertical holes. The corresponding circumferential holes, radial holes, and vertical holes are interconnected within the porous metal 18, thus providing a large surface area for heat exchange. The deionized water passing through the porous metal 18 absorbs heat and evaporates into water vapor.

[0055] The heat-absorbing fuel gas (mainly methane) and water vapor form a vortex when flowing through the mixing vane 81 and are fully mixed. They react with each other to form hydrogen and carbon monoxide, which are transported to the reformer (not shown) through the mixed gas outlet 101 for reforming.

[0056] The technical effects of the present invention are as follows:

[0057] 1. The anode exhaust gas (mainly hydrogen, carbon monoxide, and methane) and the cathode exhaust gas (mainly nitrogen and oxygen) are fully mixed in the above-mentioned combustion area and then ignited, so that the two are fully burned, thereby releasing the chemical energy of the anode exhaust gas and the cathode exhaust gas, and thus more thoroughly recovering the heat energy of the two;

[0058] 2. The anode exhaust gas (mainly hydrogen, carbon monoxide, and methane) and the cathode exhaust gas (mainly nitrogen and oxygen) are fully mixed and ignited in the above-mentioned combustion area before being discharged, which can reduce the emission concentration of the anode exhaust gas and the cathode exhaust gas, and is beneficial to environmental protection;

[0059] 3. Heat exchange fins 11 and porous metal 18 are provided on both sides of the outer wall of the outer tube 8. The heat exchange fins 11 exchange heat with the fuel gas (mainly methane) flowing through. The porous metal 18 exchanges heat with the deionized water flowing through, causing the ionized water to evaporate into water vapor. The heated fuel gas and water vapor reach the reaction conditions and react to form hydrogen and carbon monoxide. This process absorbs and utilizes the heat of the anode exhaust gas and the cathode exhaust gas themselves, as well as the heat generated by the combustion of the two, to reduce the temperature of the mixed gas discharged from the lower end of the combustion tube 16. Furthermore, the cathode exhaust gas entering through the cooling mixing inlet 20 is mixed with the high-temperature gas after combustion, which also plays a role in reducing the temperature of the mixed gas discharged from the lower end of the combustion tube 16. By reducing the temperature of the exhaust gas, the damage to the system components caused by thermal stress can be reduced;

[0060] 4. In existing technologies, the anode and cathode exhaust gas treatment systems of solid oxide fuel cells (SOFCs) are two independent systems. The fuel processing system for producing the fuel required for the SOFC is also a separate system. The internal connection losses and heat losses of these three systems limit the overall efficiency of the SOFC. Moreover, the three independent systems occupy space.

[0061] The present invention integrates the anode exhaust gas treatment system, the cathode exhaust gas treatment system and the fuel treatment system, and utilizes the heat (gas waste heat and combustion heat) of the anode exhaust gas and the cathode exhaust gas for fuel treatment, so that the fuel gas (mainly methane) reacts with water vapor to generate hydrogen and carbon monoxide for subsequent reforming.

[0062] Integrating the anode exhaust gas treatment system, cathode exhaust gas treatment system, and fuel treatment system can significantly reduce the original connection losses and heat loss, thereby greatly improving the overall efficiency of the solid oxide fuel cell (SOFC). It also greatly simplifies the system structure and significantly reduces its occupied space.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An integrated exhaust and fuel treatment assembly for a solid oxide fuel cell system, characterized by: The outer wall of the combustion tube is provided with a cathode exhaust gas main inlet hole, the cathode exhaust gas main inlet hole is provided with a cathode exhaust gas supplementary inlet hole, and the cathode exhaust gas supplementary inlet hole is provided with a cathode exhaust gas supplementary inlet hole. An igniter is provided between the cloth plates, an outer cover is provided on the outer wall of the outer tube, and the upper part of the inner cavity of the outer cover is divided into a fuel air inlet chamber and a water inlet chamber. The fuel air inlet chamber is provided with a fuel air inlet, and the water inlet chamber is provided with a water inlet. Heat exchange fins are provided in the fuel air inlet chamber, and porous metal is provided in the water inlet chamber. A mixing vane is provided on the lower part of the outer wall of the outer tube, and a mixed gas outlet is provided on the lower part of the outer cover. The angle between the central axis of the flow inclined hole and the top wall of the combustion tube is 25°-45°, and the projection of the central axis of the flow inclined hole on the top wall of the combustion tube is along the tangent direction of the circle. Two symmetrical notches are provided on the upper part of the outer cover, and dividing strips are welded at the notches. The two dividing strips divide the upper part of the inner cavity of the outer cover into a fuel air inlet chamber and a water inlet chamber, and the igniter is passed through one of the dividing strips.

2. The exhaust gas and fuel integrated treatment assembly of the solid oxide fuel cell system according to claim 1, characterized in that: The first-layer uniformly distributed plate is provided with a row of annularly distributed first-layer uniformly distributed holes, and the second-layer uniformly distributed plate is provided with a row of annularly distributed second-layer uniformly distributed holes. The number of the first-layer uniformly distributed holes is less than that of the second-layer uniformly distributed holes, and the spacing between the first-layer uniformly distributed holes is larger than that of the second-layer uniformly distributed holes.

3. The exhaust and fuel integrated treatment assembly for a solid oxide fuel cell system according to claim 1, characterized in that: The aperture of the cathode exhaust gas main inlet hole is larger than the cathode exhaust gas supplementary inlet hole and the cooling mixing inlet hole.

4. The exhaust gas and fuel integrated processing assembly of the solid oxide fuel cell system according to claim 1, characterized in that: An arc-shaped air equalizing plate is provided on the upper part of the fuel intake cavity, and an air equalizing hole is provided on the arc-shaped air equalizing plate. The arc-shaped air equalizing plate divides the upper part of the fuel intake cavity into an intake equalizing cavity, and the fuel intake port is provided in the intake equalizing cavity.

5. The exhaust gas and fuel integrated processing assembly of the solid oxide fuel cell system according to claim 1, characterized in that: The cross section of the heat exchange fin is in the shape of a square wave signal, multiple inner walls of the heat exchange fin are all in contact with the outer wall of the outer tube, and multiple outer walls of the heat exchange fin are all in contact with the inner wall of the outer cover.

6. The exhaust gas and fuel integrated processing assembly of the solid oxide fuel cell system according to claim 5, characterized in that: The material of the heat exchange fins is aluminum alloy, the thickness of the heat exchange fins is 0.3mm-0.5mm, the circumferential pitch of the heat exchange fins is 2.3mm-2.7mm, and the radial height of the heat exchange fins is 7mm-9mm.

7. The exhaust gas and fuel integrated processing assembly of the solid oxide fuel cell system according to claim 1, characterized in that: The upper part of the water inlet cavity is provided with an arc-shaped liquid balancing sheet, which is provided with a liquid balancing hole. The arc-shaped liquid balancing sheet divides the upper part of the water inlet cavity into a water inlet balancing cavity, and the water inlet is provided in the water inlet balancing cavity.

8. The exhaust gas and fuel integrated processing assembly of the solid oxide fuel cell system according to claim 1, characterized in that: The porous metal is provided with a plurality of circumferential holes, a plurality of radial holes and a plurality of vertical holes, and the corresponding circumferential holes, radial holes and vertical holes are connected inside the porous metal.

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