Automobile exhaust reforming device and reforming system

Abstract

The present invention discloses an automobile exhaust reforming device and a reforming system, which are used to introduce a mixed gas of automobile exhaust and methane. The automobile exhaust reforming device comprises: a shell having a cavity, an air inlet and an air outlet, a first baffle, a catalytic element and a cooling assembly. The first baffle is built into the shell and divides the cavity into a catalytic cavity and a cooling cavity which are independent of each other. The catalytic cavity is connected to the air inlet, and the cooling cavity is connected to the air outlet. The catalytic element is connected to the inner wall of the catalytic cavity to promote the occurrence of a catalytic reaction. The cooling assembly comprises at least one heat exchange tube and a heat exchange medium built into the cooling cavity, and one end of the heat exchange tube is connected to the catalytic cavity and the other end is connected to the air outlet. The heat exchange medium is filled between the inner wall of the cooling cavity and the outer wall of the heat exchange tube, and is used to cool down the material in the heat exchange tube. The present invention can solve the problem that the reformer has low reforming efficiency for automobile exhaust due to the lack of a cooling device, and can improve the utilization of waste heat of engine exhaust and the combustion effect.

Description

Technical Field

[0001] The invention relates to the technical field of engine exhaust treatment, and in particular to an automobile exhaust reforming device and a reforming system. Background Art

[0002] Exhaust gas fuel reforming recirculation technology (Reformed Exhaust Gas Recirculation, referred to as REGR) is a technology that combines exhaust gas recirculation and fuel reforming. The reformer uses the waste heat of the exhaust gas to reform the unburned HC and other substances in the exhaust gas into hydrogen-rich synthesis gas and re-send it to the engine for combustion. At the same time, the unreformed exhaust gas introduced into the cylinder plays a role of recirculation.

[0003] For example, the Chinese invention patent with application number: CN202210722321.7, named: Waste heat utilization system and engine based on exhaust gas reforming and recirculation, which connects the exhaust gas inlet of the reformer to the exhaust gas outlet of the engine, and connects the reformed gas outlet of the water tank to the reformed gas inlet of the engine by setting a reformer, a preheating device, an intercooler and a water tank, so that the waste heat of the reformed gas after the exhaust gas of the engine is reformed by the reformer can also be used for the preheating process of methane in the preheating device, thereby effectively improving the utilization efficiency of the waste heat of the exhaust gas. In this system, the exhaust gas treated by the reformer needs to be passed into the intercooler for cooling, and the reformer itself does not have the function of cooling the exhaust gas.

[0004] Therefore, there is an urgent need for an automobile exhaust reforming device and a reforming system to solve the problem in the prior art that the reformer itself does not have the function of cooling the exhaust gas, resulting in low reforming efficiency of the reformer for automobile exhaust gas. Summary of the invention

[0005] In view of this, it is necessary to provide an automobile exhaust reforming device and a reforming system to solve the technical problem in the prior art that the reformer itself does not have the function of cooling the exhaust gas, resulting in low reforming efficiency of the reformer for automobile exhaust gas.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides an automobile exhaust reforming device for introducing a mixed gas of automobile exhaust and methane, comprising:

[0007] A housing having a cavity and an air inlet and an air outlet communicating with the cavity;

[0008] a first baffle, the first baffle being built into the shell and dividing the cavity into a catalytic cavity and a cooling cavity which are independent of each other, the catalytic cavity being connected to the air inlet, and the cooling cavity being connected to the air outlet;

[0009] A catalytic element, which is built into the catalytic chamber and connected to the shell to promote the occurrence of a catalytic reaction;

[0010] The cooling component includes at least one heat exchange tube and a heat exchange medium. The heat exchange tube is built into the cooling cavity, and one end of the heat exchange tube is connected to the catalytic cavity, and the other end is connected to the air outlet. The heat exchange medium is filled in the gap between the inner wall of the cooling cavity and the outer wall of the heat exchange tube, and is used for cooling the material in the heat exchange tube.

[0011] Furthermore, the shell is also provided with a liquid inlet and a liquid outlet communicated with the cooling cavity for circulation of the heat exchange medium.

[0012] Furthermore, the cooling assembly also includes at least one baffle, which is built into the cooling cavity and connected to the inner wall of the cooling cavity, and the baffle divides the cooling cavity into a first cooling chamber and a second cooling chamber that are interconnected, the liquid inlet is connected to the first cooling chamber, the liquid outlet is connected to the second cooling chamber, and the liquid outlet is arranged on the side of the shell away from the liquid inlet.

[0013] Furthermore, there are two baffles in the cooling assembly, and the two baffles are staggered and connected to the inner walls on opposite sides of the cooling cavity. The two baffles divide the interior of the cooling cavity into a first cooling chamber, a second cooling chamber and a third cooling chamber that are interconnected, and the third cooling chamber is connected to both the first cooling chamber and the second cooling chamber.

[0014] Furthermore, the first partition is provided with at least one first connecting hole, which is arranged one-to-one with the heat exchange tube and passes through the first partition, one end of the heat exchange tube is inserted in the first connecting hole and is sealed to the first partition, and the baffle is provided with a second connecting hole opposite to the first connecting hole, the other end of the heat exchange tube is inserted in the second connecting hole and is sealed to the baffle.

[0015] Furthermore, it also includes a second partition, which is arranged opposite to the air outlet and connected to the cooling chamber. The second partition cooperates with the first partition to form the cooling chamber. The second partition has a third connecting hole opposite to the first connecting hole. The other end of the heat exchange tube passes through the second connecting hole and the second connecting hole in sequence and is sealed and connected to the second partition.

[0016] Furthermore, the number of the heat exchange tubes in the cooling assembly is nine, and the nine heat exchange tubes are distributed on the first partition in a rectangular array.

[0017] Furthermore, the material of the catalyst component is cordierite, and the surface of the catalyst component is loaded with nickel-cobalt catalyst particles.

[0018] Furthermore, the catalyst component is in a porous honeycomb shape, and the cross-section of the honeycomb holes on the catalyst component is square.

[0019] The technical solution of the present invention also provides an automobile exhaust reforming system, comprising the automobile exhaust reforming device as described in any one of the above items.

[0020] Compared with the prior art, the beneficial effects of the present invention include: a cavity is formed inside the shell, and the shell has an air inlet and an air outlet connected to the cavity, the mixed gas of automobile exhaust and methane enters the inside of the shell through the air inlet, and is discharged from the shell through the air outlet, wherein the first partition is built into the cavity and divides the cavity into a catalytic chamber and a cooling chamber that are independent of each other, the catalytic element is built into the catalytic chamber to promote the occurrence of the catalytic reaction, and the catalytic chamber is connected to the air inlet, the cooling assembly is built into the cooling chamber, and the heat exchange medium exchanges heat with the heat exchange tube to cool the mixed gas flowing out through the heat exchange tube. Compared with the prior art, the temperature of the mixed gas is lowered by heat exchange between the heat exchange tube and the heat exchange medium, so that the temperature of the mixed gas after the catalytic reaction is maintained at a relatively stable temperature, which is beneficial to improving the efficiency of heat exchange, reducing the conversion efficiency of carbon dioxide gas, and increasing the output of clean energy such as hydrogen and carbon monoxide gas. It can solve the technical problem in the prior art that the reformer itself does not have the function of cooling the exhaust gas, resulting in low reforming efficiency of the reformer for automobile exhaust gas, and can improve the utilization of engine exhaust waste heat and the combustion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an automobile exhaust reforming device proposed in an embodiment of the present invention;

[0022] Figure 2 is a structural schematic diagram of an automobile exhaust reforming device from another perspective according to an embodiment of the present invention;

[0023] Figure 3 is a schematic cross-sectional view of an automobile exhaust reforming device according to an embodiment of the present invention;

[0024] Figure 4 is a schematic cross-sectional structural diagram of a cooling cavity according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the three-dimensional structure of the catalyst component according to an embodiment of the present invention;

[0026] Figure 6 It is a temperature cloud diagram when a reforming reaction occurs after a mixed gas is introduced into an automobile exhaust reforming device according to an embodiment of the present invention;

[0027] Figure 7 It is a velocity cloud diagram when a reforming reaction occurs after a mixed gas is introduced into an automobile exhaust reforming device according to an embodiment of the present invention;

[0028] Figure 8 It is a pressure cloud diagram when a reforming reaction occurs after a mixed gas is introduced into an automobile exhaust reforming device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0030] See also Figure 1 and Figure 3 The present invention provides an automobile exhaust reforming device for introducing a mixed gas of automobile exhaust and methane, comprising: a shell 1, a first baffle 2, a catalyst 3 and a cooling assembly 4, wherein the shell 1 has a cavity and an air inlet 11 and an air outlet 12 connected to the cavity, the first baffle 2 is built in the shell 1, and divides the cavity into a catalytic cavity 13 and a cooling cavity 14 that are independent of each other, the catalytic cavity 13 is connected to the air inlet 11, and the cooling cavity 14 is connected to the air outlet 12, the catalyst 3 is built in the catalytic cavity 13, and is connected to the shell 1, and is used to promote the occurrence of a catalytic reaction, the cooling assembly 4 comprises at least one heat exchange tube 41 and a heat exchange medium 42, the heat exchange tube 41 is built in the cooling cavity 14, and one end of the heat exchange tube 41 is connected to the catalytic cavity 13, and the other end is connected to the air outlet 12, the heat exchange medium 42 is filled in the gap between the inner wall of the cooling cavity 14 and the outer wall of the heat exchange tube 41, and is used to cool the material in the heat exchange tube 41.

[0031] In the present device, a cavity is formed inside the shell 1, and the shell 1 has an air inlet 11 and an air outlet 12 connected to the cavity. The mixed gas of automobile exhaust and methane enters the shell 1 through the air inlet 11 and is discharged from the shell 1 through the air outlet 12. The first partition 2 is built into the cavity and divides the cavity into a catalytic chamber 13 and a cooling chamber 14 that are independent of each other. The catalytic element 3 is built into the catalytic chamber 13 to promote the occurrence of the catalytic reaction, and the catalytic chamber 13 is connected to the air inlet 11. The cooling component 4 is built into the cooling chamber 14. The heat exchange medium 42 exchanges heat with the heat exchange tube 41 to cool the mixed gas flowing out of the heat exchange tube 41.

[0032] Compared with the prior art, the temperature of the mixed gas is lowered by heat exchange between the heat exchange tube 41 and the heat exchange medium 42, so that the temperature of the mixed gas after the catalytic reaction is maintained at a relatively stable temperature, which is beneficial to improving the efficiency of heat exchange, reducing the conversion efficiency of carbon dioxide gas, and increasing the output of clean energy such as hydrogen and carbon monoxide gas. It can solve the technical problem in the prior art that the reformer itself does not have the function of cooling the exhaust gas, resulting in low efficiency of the reformer in reforming automobile exhaust, and can improve the utilization of engine exhaust waste heat and the combustion effect.

[0033] Specifically, the material of the catalyst element 3 in the present device is cordierite, and the surface of the catalyst element 3 is loaded with nickel-cobalt catalyst particles.

[0034] The catalyst uses nickel-cobalt loaded cordierite catalyst, which is a porous honeycomb structure. Nickel-cobalt catalyst particles are loaded on the carrier. The active ingredients of the catalyst are composed of nickel-cobalt bimetallic. The synergistic effect of the bimetallic enhances the surface effect of the catalyst, promotes the high dispersion of nickel metal, and makes the catalyst pore distribution uniform, so it has better catalytic activity and anti-carbon deposition performance. While nickel has good catalytic performance, adding cobalt can have better anti-carbon performance, which can ensure high efficiency while maintaining a longer service life. The carrier material is cordierite, and the honeycomb carrier is a loose and porous structure, which can further increase the surface area, promote the diffusion of reaction components, improve heat resistance, and also has the advantages of good mechanical strength and low exhaust resistance.

[0035] As an implementation method, Figure 2 and Figure 5 As shown, the catalyst member 3 is in a porous honeycomb shape, and the cross section of the honeycomb holes on the catalyst member 3 is square.

[0036] The square cross-section of the honeycomb holes is beneficial to increasing the contact area for the catalytic reaction.

[0037] like Figure 1 and Figure 3 As shown, the shell 1 is further provided with a liquid inlet 15 and a liquid outlet 16 which are connected to the cooling cavity 14 and are used for the circulation of the heat exchange medium 42 .

[0038] The heat exchange medium 42 enters the gap between the inner wall of the cooling chamber 14 and the outer wall of the heat exchange tube 41 through the liquid inlet 15, exchanges heat with the heat exchange tube 41, and is discharged from the liquid outlet 16, thereby realizing the recycling of the heat exchange medium 42 and achieving a stable cooling effect.

[0039] As an implementation method, Figure 3As shown, the cooling assembly 4 further includes at least one baffle 43, which is built into the cooling chamber 14 and connected to the inner wall of the cooling chamber 14. The baffle 43 divides the cooling chamber 14 into a first cooling chamber 141 and a second cooling chamber 142 which are interconnected. The liquid inlet 15 is connected to the first cooling chamber 141, and the liquid outlet 16 is connected to the second cooling chamber 142. The liquid outlet 16 is arranged on the side of the housing 1 away from the liquid inlet 15. The specific working process of the present invention is as follows:

[0040] The arrangement of the baffle 43 , the liquid inlet hole 15 and the liquid outlet hole 16 can improve the heat exchange efficiency between the heat exchange medium 42 and the heat exchange tube 41 .

[0041] Specifically, there are two baffles 43 in the cooling assembly 4 in the present device. The two baffles 43 are staggered and connected to the inner walls on opposite sides of the cooling chamber 14. The two baffles 43 divide the interior of the cooling chamber 14 into a first cooling chamber 141, a second cooling chamber 142 and a third cooling chamber 143 that are interconnected, and the third cooling chamber 143 is connected to both the first cooling chamber 141 and the second cooling chamber 142.

[0042] The two baffles 43 are staggered and connected to the inner walls of the cooling chamber 14 on opposite sides, so as to extend the flow of the heat exchange medium 42 in the cooling chamber 14, thereby improving the cooling effect.

[0043] As an embodiment, the first partition 2 is provided with at least one first connecting hole, the first connecting hole is arranged one-to-one corresponding to the heat exchange tube 41 and passes through the first partition 2, one end of the heat exchange tube 41 is inserted in the first connecting hole and is sealedly connected to the first partition 2, the baffle 43 is provided with a second connecting hole opposite to the first connecting hole, the other end of the heat exchange tube 41 is inserted in the second connecting hole and is sealedly connected to the baffle 43.

[0044] The heat exchange tube 41 is connected to the first partition plate 2 and the baffle plate 43 through the first connecting hole and the second connecting hole, respectively. Meanwhile, a sealed connection is formed between the heat exchange tube 41 and the first partition plate 2 and the baffle plate 43, respectively.

[0045] Specifically, Figure 4 As shown, the number of heat exchange tubes 41 in the cooling assembly of the device is nine, and the nine heat exchange tubes 41 are distributed on the first partition plate 2 in a rectangular array.

[0046] Nine heat exchange tubes 41 are distributed in the shell 1 in a rectangular array, and connect the catalyst chamber and the gas outlet 12 to guide the flow of gas. At the same time, the nine heat exchange tubes 41 can effectively increase the contact area for cooling and improve the heat exchange efficiency.

[0047] As a factual method, Figure 3As shown, the device also includes a second partition 5, which is arranged opposite to the air outlet 12 and connected to the cooling chamber 14. The second partition 5 cooperates with the first partition 2 to form the cooling chamber 14. The second partition 5 has a third connecting hole opposite to the first connecting hole. The other end of the heat exchange tube 41 passes through the second connecting hole and the second connecting hole in sequence and is sealed and connected to the second partition 5.

[0048] The second partition plate 5 cooperates with the first partition plate 2 to seal the heat exchange medium 42 in the cooling chamber 14 to prevent the heat exchange medium 42 from contacting with the mixed gas or the catalyst.

[0049] The invention also provides an automobile exhaust reforming system, comprising an automobile exhaust reforming device.

[0050] Specifically, the automobile exhaust reforming system also includes a first air intake component, a second air intake component, an exhaust gas collecting component and a water tank component. The air intake end of the first air intake component is connected to the air outlet end of the engine, and the air outlet end is connected to the air inlet 11 of the shell 1. The air intake end of the first air intake component is connected to the methane storage tank, and the air outlet end is connected to the air inlet 11 of the shell 1. The exhaust gas and fresh methane gas of the automobile engine both enter the catalytic chamber 13 through the air inlet 11, and a catalytic reaction occurs after mixing. The exhaust gas generated after the reaction contains methane, carbon dioxide, carbon monoxide and hydrogen, which are collected or distributed for utilization by the exhaust gas collecting component. The water tank component here is the cooling water tank of the automobile. The circulating water in the cooling water tank enters the cooling chamber 14 through the liquid inlet hole 15, and is discharged to the cooling water tank from the liquid outlet hole 16 to form a recycling utilization.

[0051] Furthermore, the shell 1 in the present device is made of cast iron, which can work in a high-temperature and high-pressure working environment with little deformation due to heat and is not easy to wear; the heat exchange tube 41 is made of copper and is a partition wall between the exhaust gas and the heat exchange medium 42, which can better exchange heat between the reformed gas and cool the high-temperature gas to the engine combustion range; the first partition plate 2 and the second partition plate 5 are made of cast iron, and its main function is to separate the gas flow channel from the coolant flow channel; the baffle 43 is made of cast iron, which reduces the turbulence and pressure of the coolant in the cooling channel, and can also improve the cooling efficiency of the coolant.

[0052] Furthermore, the present invention draws on the experience of carbon dioxide-methane reforming in industry, improves the catalyst, improves the catalytic reforming of carbon dioxide and methane in the tail gas, and further achieves the goal of reducing carbon gain of internal combustion engines. The tail gas of the internal combustion engine and fresh methane reforming are realized in the recirculation to achieve the purpose of improving combustion, improving thermal efficiency, and reducing carbon dioxide emissions. The intake temperature in the reactor is 700°C, the intake speed is 3m / s, and the mixed gas methane / carbon dioxide introduced is 1.3. The obtained methane and carbon dioxide conversion rates are 87.1% and 43.6% respectively. The reason why the methane conversion rate is higher than that of carbon dioxide is that the tail gas also contains oxygen, and the fresh methane consumes part of the methane in priority to the oxidation reaction with oxygen, which in turn affects the conversion effect of methane and carbon dioxide. At the same time, the mass fractions of carbon monoxide and hydrogen increase from 3% and 2% to 34.09% and 6.776% respectively. n(CO) / n(H2) increases from 0.1 to 0.34. The unconverted part of carbon dioxide re-enters the cylinder. Due to the large specific heat capacity of carbon dioxide, it can also reduce the maximum combustion temperature and reduce engine emissions. In addition, the large amount of hydrogen and carbon monoxide generated also provides clean energy for the engine, improves the engine's power performance, and reduces the engine's fuel consumption.

[0053] Specifically, Figure 6 As shown, after the gas enters the porous medium catalytic domain, it drops to below 350°C after the middle section of the catalytic element 3. This is because the dry reforming reaction of methane and carbon dioxide is a strongly endothermic reaction. The gas absorbs a large amount of heat when it contacts the catalyst for the reforming reaction, and the temperature difference is mainly concentrated when the catalyst contacts the gas, and the temperature change of the catalytic main area is not large. After the gas enters the cooling chamber 14, the gas on the wall of the heat exchange tube 41 is gradually cooled. From the cross-section of the coolant, after the coolant exchanges heat with the gas, the overall temperature change amplitude is very small. The highest temperature of the gas in the heat exchange tube 41 appears at the central axis of each heat exchange tube 41, and all gas temperatures in the heat exchange tube 41 are below 160°C. From the perspective of cooling efficiency, after optimization, the average temperature of the coolant at the cooling outlet is 40.36°C, the average outlet temperature of the reformed gas is 93°C, and the cooling efficiency is 88.01%.

[0054] like Figure 7As shown, the gas enters the reformer at a velocity of 3 m / s at the inlet. Due to the interference of the porous medium during the flow process, the reaction gas will be temporarily blocked in the porous medium area and the inlet space, which also leads to the maximum gas flow rate at the inlet reaching 3.68 m / s. After the reactant gas enters the catalytic main body area, the gas flow rate forms an obvious flow rate gradient with the inlet. Most of the gas passes through the porous medium at a flow rate of about 1 m / s, and the residence time in the porous medium area becomes longer, which also makes the contact time between the reactant gas and the active components of the catalyst longer, increasing the reaction rate of the catalytic reaction. In addition, with regard to the flow direction of the cooling liquid, after the cooling liquid has entered the cooling body at 3 m / s, it flows through the heat exchange tube 41 and exchanges heat with it. After bypassing the two baffles 43, the cooling liquid is discharged from the outlet, and the relative pressure change of the cooling liquid is not obvious.

[0055] like Figure 8 As shown in the figure, when the gas enters the porous medium area, a relative pressure difference is generated in the reformer. The gas drops from the highest 368Pa to 22.77Pa, and the pressure drop per unit length is 1.33Pa / mm. As the reaction continues on the porous medium, the relative pressure shows a decreasing trend and the pressure drop is also lost in the porous medium area. The pressure changes at the outlet of the catalyst body and the outlet of the entire reformer are not obvious. Due to the large viscous resistance, the pressure drop in the porous medium area of ​​the reaction zone is large.

[0056] In the specific working process of the present invention, a cavity is formed inside the shell 1, and the shell 1 has an air inlet 11 and an air outlet 12 connected to the cavity. The mixed gas of automobile exhaust and methane enters the inside of the shell 1 through the air inlet 11 and is discharged from the shell 1 through the air outlet 12, wherein the first partition 2 is built into the cavity and divides the cavity into a catalytic chamber 13 and a cooling chamber 14 that are independent of each other, the catalytic element 3 is built into the catalytic chamber 13 to promote the occurrence of the catalytic reaction, and the catalytic chamber 13 is connected to the air inlet 11, the cooling assembly 4 is built into the cooling chamber 14, and the heat exchange medium 42 is used to cool the mixed gas flowing out of the heat exchange tube 41 by heat exchange with the heat exchange tube 41. Compared with the prior art, the temperature of the mixed gas is reduced by heat exchange between the heat exchange tube 41 and the heat exchange medium 42, so that the temperature of the mixed gas after the catalytic reaction is maintained at a relatively stable temperature, which is conducive to improving the efficiency of heat exchange, reducing the conversion efficiency of carbon dioxide gas, and increasing the output of clean energy such as hydrogen and carbon monoxide gas.

[0057] The device, through the above structure, can solve the technical problem in the prior art that the reformer itself does not have the function of cooling the exhaust gas, resulting in low efficiency of the reformer in reforming automobile exhaust gas, and can improve the utilization of engine exhaust waste heat and the combustion effect.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An automobile exhaust reforming device, used for introducing a mixed gas of automobile exhaust and methane, characterized in that: include: A housing having a cavity and an air inlet and an air outlet communicating with the cavity; a first baffle, the first baffle being built into the shell and dividing the cavity into a catalytic cavity and a cooling cavity which are independent of each other, the catalytic cavity being connected to the air inlet, and the cooling cavity being connected to the air outlet; A catalytic element, which is built into the catalytic chamber and connected to the shell to promote the occurrence of a catalytic reaction; The cooling component includes at least one heat exchange tube and a heat exchange medium. The heat exchange tube is built into the cooling cavity, and one end of the heat exchange tube is connected to the catalytic cavity, and the other end is connected to the air outlet. The heat exchange medium is filled in the gap between the inner wall of the cooling cavity and the outer wall of the heat exchange tube, and is used for cooling the material in the heat exchange tube.

2. The automobile exhaust reforming device according to claim 1, characterized in that: The shell is also provided with a liquid inlet and a liquid outlet communicated with the cooling cavity for circulation of the heat exchange medium.

3. The automobile exhaust reforming device according to claim 2, characterized in that: The cooling assembly also includes at least one baffle, which is built into the cooling cavity and connected to the inner wall of the cooling cavity. The baffle divides the cooling cavity into a first cooling chamber and a second cooling chamber that are interconnected. The liquid inlet is connected to the first cooling chamber, the liquid outlet is connected to the second cooling chamber, and the liquid outlet is arranged on a side of the shell away from the liquid inlet.

4. The automobile exhaust reforming device according to claim 3, characterized in that: There are two baffles in the cooling assembly, and the two baffles are staggered and connected to the inner walls on opposite sides of the cooling cavity. The two baffles divide the interior of the cooling cavity into a first cooling chamber, a second cooling chamber and a third cooling chamber that are interconnected, and the third cooling chamber is connected to both the first cooling chamber and the second cooling chamber.

5. The automobile exhaust reforming device according to claim 3, characterized in that: The first partition is provided with at least one first connecting hole, which is arranged one-to-one with the heat exchange tube and passes through the first partition. One end of the heat exchange tube is inserted into the first connecting hole and is sealed to the first partition. The baffle is provided with a second connecting hole opposite to the first connecting hole. The other end of the heat exchange tube is inserted into the second connecting hole and is sealed to the baffle.

6. The automobile exhaust reforming device according to claim 5, characterized in that: It also includes a second partition, which is arranged opposite to the air outlet and connected to the cooling chamber. The second partition cooperates with the first partition to form the cooling chamber. The second partition has a third connecting hole opposite to the first connecting hole. The other end of the heat exchange tube passes through the second connecting hole and the second connecting hole in sequence and is sealed and connected to the second partition.

7. The automobile exhaust reforming device according to claim 6, characterized in that: The number of the heat exchange tubes in the cooling assembly is nine, and the nine heat exchange tubes are distributed on the first partition in a rectangular array.

8. The automobile exhaust reforming device according to claim 1, characterized in that: The material of the catalyst component is cordierite, and the surface of the catalyst component is loaded with nickel-cobalt catalyst particles.

9. The automobile exhaust reforming device according to claim 8, characterized in that: The catalytic component is in a porous honeycomb shape, and the cross section of the honeycomb holes on the catalytic component is square.

10. An automobile exhaust reforming system, characterized in that: The invention comprises the automobile exhaust reforming device as claimed in any one of claims 1 to 9.

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