Fuel reforming device

Abstract

The utility model belongs to the technical field of fuel reforming reaction, and discloses a fuel reforming device which comprises a combustor, a reformer, an air heat exchanger and a fuel heat exchanger. Fuel waste gas is combusted in the combustor to heat air; the reformer is annularly arranged to form a high-temperature air channel and located on the downstream of the combustor, and high-temperature air heated by the combustor circulates through the high-temperature air channel. The air heat exchanger is arranged outside the combustor and the reformer in a surrounding mode and can conduct heat exchange between external cold air and high-temperature air flowing out of the high-temperature air channel, and the wall face of a center channel formed by the air heat exchanger in the surrounding mode abuts against the outer wall of the reformer. The fuel heat exchanger is arranged outside the air heat exchanger in a surrounding mode and can conduct heat exchange between high-temperature fuel waste gas and to-be-reformed fuel, one part of the cooled fuel waste gas enters the combustor, the other part of the cooled fuel waste gas is discharged into the fuel waste gas collecting device, and the to-be-reformed fuel enters the reformer. The fuel reforming device is compact in structure, uniform in temperature distribution and good in reforming effect, and effectively prevents the problem of easy leakage caused by utilizing an additional heat source.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel reforming reaction, in particular to a fuel reforming device. Background Art

[0002] A fuel reformer is a reaction device that converts fuels such as methanol or methane into cleaner and more efficient fuels such as hydrogen and carbon monoxide through a reforming reaction.

[0003] The existing fuel reforming device generally includes a reformer, a burner, and a heat exchanger, etc., so the overall structure is relatively large. In order to carry out the reforming reaction, the reformer needs to be heated up. The existing fuel reforming device needs to introduce hot air into the reformer, so a hot air circulation pipeline and other structures will be added between the additional heat source and the reformer, which is not conducive to reducing the overall volume. In addition, the connection between the hot air circulation pipeline and the reformer is prone to leaks of the fuel to be reformed due to poor sealing. In addition, if the hot air in the reformer is unevenly distributed, a significant temperature gradient will appear, which will affect the reforming reaction effect.

[0004] Therefore, there is an urgent need for a fuel reforming device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a fuel reforming device, which has a compact structure, uniform temperature distribution, good reforming reaction effect, and can effectively prevent problems such as easy leakage caused by heating with an additional heat source.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A fuel reforming device, comprising:

[0008] a burner in which the fuel exhaust gas can be burned to heat the air;

[0009] The reformer is an annular hollow structure, annularly arranged to form a high-temperature air channel, and is arranged downstream of the burner. The high-temperature air channel can flow high-temperature air heated by the burner;

[0010] An air heat exchanger, which is an annular hollow structure, is arranged outside the burner and the reformer in an annular manner, and is capable of exchanging heat between external cold air and high-temperature air flowing out through the high-temperature air channel. The wall surface of the central channel formed by the annular arrangement of the air heat exchanger abuts against the outer wall of the reformer;

[0011] The fuel heat exchanger is an annular hollow structure, which is arranged outside the air heat exchanger. It can perform heat exchange between high-temperature fuel exhaust gas and the fuel to be reformed. Part of the cooled fuel exhaust gas can enter the burner, and the other part is discharged to the fuel exhaust gas collection device. The fuel to be reformed can enter the reformer.

[0012] As a preferred solution of the fuel reforming device provided by the utility model, the wall surface of the central channel formed by the ring-shaped air heat exchanger is spaced apart from the outer wall of the burner to form a reforming fuel channel, and the reformed fuel formed after reforming by the reformer can flow out from the reforming fuel channel.

[0013] As a preferred embodiment of the fuel reforming device provided by the utility model, the fuel heat exchanger is provided with a fuel cold side inlet pipe and a fuel hot side inlet pipe, and the fuel hot side inlet pipe and the fuel cold side inlet pipe are respectively arranged at two ends of the axial direction of the fuel heat exchanger, and the high-temperature fuel exhaust gas enters the fuel heat exchanger from the fuel hot side inlet pipe, and the fuel to be reformed enters the fuel heat exchanger from the fuel cold side inlet pipe.

[0014] As a preferred solution of the fuel reforming device provided by the utility model, the fuel heat exchanger is also provided with a fuel hot side outlet pipe, and the fuel hot side outlet pipe is connected to the inlet of the reformer after passing through the fuel hot side inlet pipe, and the fuel to be reformed in the fuel heat exchanger can enter the reformer from the fuel hot side outlet pipe.

[0015] As a preferred solution of the fuel reforming device provided by the utility model, the fuel heat exchanger is also provided with a fuel cold side outlet pipe, and the fuel cold side outlet pipe and the fuel hot side outlet pipe are respectively located at two ends of the axial direction of the fuel heat exchanger, and the cooled fuel exhaust gas can be discharged from the fuel heat exchanger from the fuel cold side outlet pipe.

[0016] As a preferred solution of the fuel reforming device provided by the utility model, the fuel cold side outlet pipe is connected with a first branch outlet pipe and a second branch outlet pipe, the first branch outlet pipe is connected to the burner, and the second branch outlet pipe is connected to the fuel exhaust gas collection device.

[0017] As a preferred solution of the fuel reforming device provided by the utility model, the air heat exchanger is provided with an air hot side inlet channel, the air hot side inlet channel is connected to the high temperature air channel, and the high temperature air heated by the burner can flow into the air heat exchanger from the high temperature air channel and the air hot side inlet channel;

[0018] The fuel heat exchanger is also provided with a fuel hot side outlet pipe, which is connected to the inlet of the reformer, a part of which is located in the fuel hot side inlet pipe, and another part of which is located in the air hot side inlet channel.

[0019] As a preferred solution of the fuel reforming device provided by the utility model, there are multiple fuel hot side outlet pipes, and the multiple fuel hot side outlet pipes are distributed at one end of the fuel heat exchanger at intervals along the circumferential direction.

[0020] As a preferred embodiment of the fuel reforming device provided by the utility model, the air heat exchanger is provided with an air hot side inlet channel and an air cold side inlet pipe, and the air hot side inlet channel and the air cold side inlet pipe are respectively arranged at two ends of the air heat exchanger in the axial direction, and the high-temperature air heated by the burner enters the air heat exchanger from the air hot side inlet channel, and the external cold air enters the air heat exchanger from the air cold side inlet pipe.

[0021] As a preferred solution of the fuel reforming device provided by the utility model, a plurality of heat-conducting fins are arranged inside the reformer, the plurality of heat-conducting fins are arranged at staggered intervals, and a reforming catalytic coating layer is provided on the heat-conducting fins.

[0022] Beneficial effects of the utility model:

[0023] The fuel reforming device provided by the utility model includes a burner, a reformer, an air heat exchanger and a fuel heat exchanger. The reformer is an annular hollow structure, which is arranged in an annular manner to form a high-temperature air channel and is arranged downstream of the burner. The air heat exchanger is an annular hollow structure, which is arranged in an annular manner outside the burner and the reformer. The fuel heat exchanger is an annular hollow structure, which is arranged in an annular manner outside the air heat exchanger. The fuel exhaust gas can be burned in the burner to heat the high-temperature air. The high-temperature air channel can be used for the circulation of the high-temperature air heated by the burner. The air heat exchanger can perform heat exchange between the external cold air and the high-temperature air flowing out of the high-temperature air channel. The fuel heat exchanger can perform heat exchange between the high-temperature fuel exhaust gas and the fuel to be reformed. A part of the cooled fuel exhaust gas can enter the burner, and the other part is discharged to the fuel exhaust gas collecting device. The fuel to be reformed can enter the reformer. That is to say, in the fuel reforming device, the heat exchange between the external cold air and the high-temperature air is carried out separately from the heat exchange between the fuel exhaust gas and the fuel to be reformed, avoiding the risk of mixing air and fuel due to leakage. The wall of the central channel formed by the ring of the air heat exchanger is against the outer wall of the reformer. In other words, the reforming heat of the reformer comes from the air heat exchanger and the high-temperature air channel. The reforming temperature requirement can be met without the introduction of an additional heat source for heating, which is conducive to improving the structural compactness of the fuel reforming device. Moreover, the air heat exchanger can simultaneously exchange heat with the entire outer wall of the reformer, and the high-temperature air in the high-temperature air channel can also exchange heat with the wall of the high-temperature air channel as a whole, effectively improving the uniformity of the temperature distribution inside the reformer and improving the reforming reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of a fuel reforming device provided in an embodiment of the utility model.

[0025] In the figure:

[0026] 100. burner; 110. air inlet;

[0027] 200. reformer; 210. high temperature air channel;

[0028] 300, air heat exchanger; 310, air hot side inlet channel; 320, air cold side inlet pipe; 330, air hot side outlet channel; 340, air cold side outlet channel;

[0029] 400, fuel heat exchanger; 410, fuel cold side inlet pipe; 420, fuel hot side inlet pipe; 430, fuel hot side outlet pipe; 440, fuel cold side outlet pipe; 441, first branch outlet pipe; 442, second branch outlet pipe;

[0030] 500. Reforming fuel channel. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Figure 1 A cross-sectional view of a fuel reforming device provided by an embodiment of the present utility model is shown, wherein the solid arrows indicate the flow direction of the fuel, and the dotted arrows indicate the flow direction of the air. Figure 1 This embodiment provides a fuel reforming device, which includes a burner 100 , a reformer 200 , an air heat exchanger 300 , and a fuel heat exchanger 400 .

[0036] Specifically, the top of the burner 100 is provided with an air inlet 110, and external air can enter the burner 100 from the air inlet 110. The burner 100 is provided with two independent cavities, one of which can be used for burning fuel exhaust gas, and the other cavity is used for air circulation, so as to utilize the combustion of fuel exhaust gas to achieve air heating. The reformer 200 is an annular hollow structure, and a high-temperature air channel 210 is formed in an annular manner. The reformer 200 is arranged downstream of the burner 100, and the high-temperature air channel 210 is connected to the tapered exhaust pipe arranged at the bottom of the burner 100, and can be used for high-temperature air heated by the burner 100. The reformer 200 is arranged in an annular manner on the periphery of the exhaust pipe to achieve full utilization of space. In this embodiment, the fuel exhaust gas comes from the fuel stack.

[0037] Continue to refer to Figure 1 The air heat exchanger 300 is an annular hollow structure, which is arranged outside the burner 100 and the reformer 200, and can perform heat exchange between external cold air and high-temperature air flowing out through the high-temperature air channel 210. The air heat exchanger 300 is provided with an air hot side inlet channel 310 and an air cold side inlet pipe 320. The air hot side inlet channel 310 and the air cold side inlet pipe 320 are respectively arranged at both ends of the air heat exchanger 300 in the axial direction, wherein the air hot side inlet channel 310 is arranged at the bottom end of the air heat exchanger 300, and the air cold side inlet pipe 320 is arranged at the top end of the air heat exchanger 300. The distance between the air hot side inlet channel 310 and the air cold side inlet pipe 320 is relatively far, so as to prevent the problem of heat transfer between the high-temperature part and the low-temperature part due to the close distance between them. The outlet of the high temperature air passage 210 is connected to the air hot side inlet passage 310, and the axial direction of the air hot side inlet passage 310 is perpendicular to the axial direction of the high temperature air passage 210. The high temperature air heated by the burner 100 enters the air heat exchanger 300 from the high temperature air passage 210 and the air hot side inlet passage 310, and the external cold air enters the air heat exchanger 300 from the air cold side inlet pipe 320.

[0038] Specifically, the wall surface of the central channel formed by the air heat exchanger 300 is against the outer wall of the reformer 200. That is to say, through the above arrangement, the reforming heat of the reformer 200 comes from the high-temperature air inside the air heat exchanger 300 and in the high-temperature air channel 210, and the reforming temperature requirement can be met without the need to introduce an additional heat source for heating, which is conducive to improving the structural compactness of the fuel reforming device. In addition, the air heat exchanger 300 can simultaneously exchange heat with the entire outer wall of the reformer 200, and the high-temperature air in the high-temperature air channel 210 can also exchange heat with the wall surface of the high-temperature air channel 210 as a whole, effectively improving the uniformity of the temperature distribution inside the reformer 200 and improving the reforming reaction effect.

[0039] More specifically, the air heat exchanger 300 is also provided with an air hot side outlet channel 330 and an air cold side outlet channel 340. The air hot side outlet channel 330 is provided at the bottom end of the air heat exchanger 300, and the air cold side outlet channel 340 is provided at the top end of the air heat exchanger 300. The distance between the air hot side outlet channel 330 and the air cold side outlet channel 340 is relatively far, so as to prevent the problem of heat transfer between the high temperature part and the low temperature part due to the close distance. The cooled high temperature air is discharged from the air cold side outlet channel 340, and the heated external cold air is discharged from the air hot side outlet channel 330, to be used in the next step. It should be noted that the air hot side outlet channel 330 and the air cold side outlet channel 340 can be respectively provided in plurality, and the number thereof is not limited in this embodiment.

[0040] More specifically, the wall of the central channel formed by the ring-shaped air heat exchanger 300 is spaced apart from the outer wall of the burner 100 to form an annular reforming fuel channel 500, and the reforming fuel formed after reforming by the reformer 200 can flow out of the fuel reforming device from the reforming fuel channel 500. The temperature of the burner 100 is relatively high, but the reforming fuel channel 500 sandwiched between it and the air heat exchanger 300 can effectively reduce the heat conduction between the burner 100 and the upper part of the air heat exchanger 300. And the burner 100 can further heat the reforming fuel flowing in the reforming fuel channel 500 to ensure that the reforming fuel meets the outlet temperature requirement.

[0041] Continue to refer to Figure 1 The fuel heat exchanger 400 is an annular hollow structure, which is arranged outside the air heat exchanger 300, and can perform heat exchange between the high-temperature fuel exhaust gas and the fuel to be reformed. A part of the cooled fuel exhaust gas can enter the burner 100, and the other part is discharged to the fuel exhaust gas collection device (not shown), and the fuel to be reformed can enter the reformer 200.

[0042] Specifically, the fuel heat exchanger 400 is provided with a fuel cold side inlet pipe 410 and a fuel hot side inlet pipe 420. The fuel hot side inlet pipe 420 and the fuel cold side inlet pipe 410 are respectively arranged at two ends of the fuel heat exchanger 400 in the axial direction, wherein the fuel cold side inlet pipe 410 is arranged at the top end of the fuel heat exchanger 400, and the fuel hot side inlet pipe 420 is arranged at the bottom end of the fuel heat exchanger 400. High-temperature fuel exhaust gas enters the fuel heat exchanger 400 from the fuel hot side inlet pipe 420, and the fuel to be reformed enters the fuel heat exchanger 400 from the fuel cold side inlet pipe 410.

[0043] More specifically, the fuel heat exchanger 400 is further provided with a fuel hot side outlet pipe 430. The fuel hot side outlet pipe 430 passes through the fuel hot side inlet pipe 420 and is connected to the inlet of the reformer 200. The fuel to be reformed in the fuel heat exchanger 400 can enter the reformer 200 from the fuel hot side outlet pipe 430. A portion of the fuel hot side outlet pipe 430 is located in the fuel hot side inlet pipe 420, and another portion is located in the air hot side inlet channel 310. That is, when the fuel to be reformed is sent into the reformer 200 through the fuel hot side outlet pipe 430, it can exchange heat with the fuel hot side inlet pipe 420 and the air hot side inlet channel 310 with higher temperatures, thereby further increasing the temperature.

[0044] Preferably, there are multiple hot fuel outlet pipes 430, which are circumferentially spaced at one end of the fuel heat exchanger 400. By providing multiple hot fuel outlet pipes 430, the efficiency and uniformity of the fuel to be reformed entering the reformer 200 can be improved.

[0045] More specifically, the fuel heat exchanger 400 is further provided with a fuel cold side outlet pipe 440. The fuel cold side outlet pipe 440 and the fuel hot side outlet pipe 430 are respectively located at two ends of the fuel heat exchanger 400 in the axial direction, wherein the fuel cold side outlet pipe 440 is arranged at the top end of the fuel heat exchanger 400, and the fuel hot side outlet pipe 430 is arranged at the bottom end of the fuel heat exchanger 400. The cooled fuel exhaust gas can be discharged from the fuel heat exchanger 400 from the fuel cold side outlet pipe 440. The fuel cold side outlet pipe 440 is connected to a first branch outlet pipe 441 and a second branch outlet pipe 442. The first branch outlet pipe 441 is connected to the burner 100, and can pass a part of the high temperature air into the burner 100, and the second branch outlet pipe 442 is connected to a fuel exhaust gas collecting device (not shown), and can pass another part of the high temperature air into the fuel exhaust gas collecting device.

[0046] Preferably, a plurality of heat-conducting fins are arranged inside the reformer 200, and the plurality of heat-conducting fins are arranged at staggered intervals. Through the above arrangement, the temperature inside the reformer 200 is ensured to be relatively uniform, thereby improving the reforming effect and efficiency.

[0047] Preferably, each heat-conducting fin is coated with a reforming catalyst to form a reforming catalytic coating layer to increase the surface area of ​​the reforming reaction.

[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A fuel reforming device, characterized in that: include: A burner (100) in which the fuel exhaust gas can be burned to heat the air; The reformer (200) is an annular hollow structure, annularly arranged to form a high-temperature air channel (210), and is arranged downstream of the burner (100). The high-temperature air channel (210) can allow high-temperature air heated by the burner (100) to circulate; The air heat exchanger (300) is an annular hollow structure, is disposed in an annular manner outside the burner (100) and the reformer (200), and is capable of performing heat exchange between external cold air and high-temperature air flowing out through the high-temperature air channel (210); the wall surface of the central channel formed by the annular arrangement of the air heat exchanger (300) abuts against the outer wall of the reformer (200); The fuel heat exchanger (400) is an annular hollow structure, which is arranged outside the air heat exchanger (300) and can perform heat exchange between high-temperature fuel exhaust gas and fuel to be reformed. A portion of the cooled fuel exhaust gas can enter the burner (100), and the other portion is discharged to the fuel exhaust gas collecting device. The fuel to be reformed can enter the reformer (200).

2. The fuel reforming device according to claim 1, characterized in that: The wall surface of the central channel formed by the circular arrangement of the air heat exchanger (300) is spaced apart from the outer wall of the burner (100) to form a reforming fuel channel (500), and the reformed fuel formed after reforming by the reformer (200) can flow out of the reforming fuel channel (500).

3. The fuel reforming device according to claim 1, characterized in that: The fuel heat exchanger (400) is provided with a fuel cold side inlet pipe (410) and a fuel hot side inlet pipe (420). The fuel hot side inlet pipe (420) and the fuel cold side inlet pipe (410) are respectively arranged at two ends of the axial direction of the fuel heat exchanger (400). High-temperature fuel exhaust gas enters the fuel heat exchanger (400) from the fuel hot side inlet pipe (420), and the fuel to be reformed enters the fuel heat exchanger (400) from the fuel cold side inlet pipe (410).

4. The fuel reforming device according to claim 3, characterized in that: The fuel heat exchanger (400) is also provided with a fuel hot side outlet pipe (430), and the fuel hot side outlet pipe (430) passes through the fuel hot side inlet pipe (420) and is connected to the inlet of the reformer (200). The fuel to be reformed in the fuel heat exchanger (400) can enter the reformer (200) from the fuel hot side outlet pipe (430).

5. The fuel reforming device according to claim 4, characterized in that: The fuel heat exchanger (400) is also provided with a fuel cold side outlet pipe (440), and the fuel cold side outlet pipe (440) and the fuel hot side outlet pipe (430) are respectively located at two ends of the axial direction of the fuel heat exchanger (400), and the cooled fuel exhaust gas can be discharged from the fuel heat exchanger (400) through the fuel cold side outlet pipe (440).

6. The fuel reforming device according to claim 5, characterized in that: The fuel cold side outlet pipe (440) is connected to a first branch outlet pipe (441) and a second branch outlet pipe (442), wherein the first branch outlet pipe (441) is connected to the burner (100), and the second branch outlet pipe (442) is connected to the fuel exhaust gas collecting device.

7. The fuel reforming device according to claim 3, characterized in that: The air heat exchanger (300) is provided with an air hot side inlet channel (310), the air hot side inlet channel (310) is connected to the high temperature air channel (210), and the high temperature air heated by the burner (100) can flow into the air heat exchanger (300) from the high temperature air channel (210) and the air hot side inlet channel (310); The fuel heat exchanger (400) is also provided with a fuel hot side outlet pipe (430), and the fuel hot side outlet pipe (430) is connected to the inlet of the reformer (200), a part of the fuel hot side outlet pipe (430) is located in the fuel hot side inlet pipe (420), and the other part is located in the air hot side inlet channel (310).

8. The fuel reforming device according to any one of claims 4 to 7, characterized in that: There are a plurality of fuel hot side outlet pipes (430), and the plurality of fuel hot side outlet pipes (430) are distributed at intervals along the circumferential direction at one end of the fuel heat exchanger (400).

9. The fuel reforming device according to claim 1, characterized in that: The air heat exchanger (300) is provided with an air hot side inlet channel (310) and an air cold side inlet pipe (320), and the air hot side inlet channel (310) and the air cold side inlet pipe (320) are respectively arranged at two ends of the air heat exchanger (300) in an axial direction, and high-temperature air heated by the burner (100) enters the air heat exchanger (300) from the air hot side inlet channel (310), and external cold air enters the air heat exchanger (300) from the air cold side inlet pipe (320).

10. The fuel reforming device according to claim 1, characterized in that: A plurality of heat-conducting fins are arranged inside the reformer (200), the plurality of heat-conducting fins are arranged at staggered intervals, and a reforming catalytic coating layer is arranged on the heat-conducting fins.

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