CN219546704U - Hydrocarbon fuel autothermal reformer - Google Patents

Abstract

The utility model belongs to the technical field of fuel reforming, and discloses a hydrocarbon fuel autothermal reformer which comprises a base, a supply assembly, a shell and an evaporator, wherein the supply assembly is arranged on the base and is used for supplying gaseous fuel and air, the evaporator comprises a box body and a connecting pipe, the box body is connected with the shell, a water inlet end and a water outlet end are arranged on the side wall of the box body, the water inlet end is communicated with an external water source, the water outlet end is communicated with an inner cavity of the shell, the connecting pipe is arranged in the box body and is subjected to mixed combustion, high-temperature tail gas generated by the combustion passes through the connecting pipe, liquid water enters from the water inlet end of the evaporator, the high-temperature tail gas is subjected to high-temperature heating to high-temperature evaporation to generate gaseous water, and finally enters the shell to complete the subsequent hydrogen production reaction by reforming of hydrocarbon fuel.

Description

Hydrocarbon fuel autothermal reformer

Technical Field

The utility model relates to the technical field of fuel reforming, in particular to an autothermal reformer for hydrocarbon fuel.

Background

Currently, hydrocarbon reforming reactions can be divided into three types: steam reforming, partial oxidation reforming, and autothermal reforming. Among them, the steam reforming method can obtain a gas of higher purity, but the reaction is endothermic, requires an external heat source and has low thermal efficiency; partial oxidation reforming is an exothermic reaction that can be performed at lower temperatures, but with relatively low purity gases; the autothermal reforming method combines steam reforming and partial oxidation reforming, and can achieve the purpose of obtaining gas with higher purity without external heat supply after the reaction is started, so that the autothermal reforming reaction is the focus of research.

The existing gaseous hydrocarbon fuel is reformed by adopting a catalytic reaction under the heating condition, the catalytic reaction is a surface reaction, a large volume is needed, and additional heating is needed, meanwhile, the catalytic reaction also needs to maintain a certain temperature, carbon is easy to be deposited when the temperature is too high, and the catalyst is easy to fail; too low a temperature, the catalytic reaction rate is too slow or no reaction at all occurs.

In order to solve the problem, a plurality of reaction tubes are arranged in a shell in the existing reforming device, and a fuel gas conveying tube and an air conveying tube are respectively communicated with the shell so as to respectively convey gas used as fuel and gas used for supporting combustion to one end of the reforming reactor, which is provided with an ignition device, in the shell, for burning and supplying heat, and a water vapor input tube and a material conveying tube are respectively communicated with each reaction tube in the shell so as to respectively convey water vapor and materials participating in reaction to each reaction tube in the shell. However, the high-temperature flue gas input by the flue gas input pipe and used for supplying heat to the reaction pipe can be realized only by an external combustion device, and the structure is complex, and the energy consumption is low.

Accordingly, there is a need for an autothermal reformer for hydrocarbon fuels that addresses the above-described problems.

Disclosure of Invention

The utility model aims to provide the hydrocarbon fuel autothermal reforming device which can realize the processes of combustion, water evaporation and reforming simultaneously, has compact structure and high integration, can provide high-temperature gas without connecting with additional combustion equipment, and is self-heating, efficient and energy-saving.

In order to solve the problems existing in the prior art, the utility model adopts the following technical scheme:

an autothermal reformer for hydrocarbon fuel, comprising:

a base;

a supply assembly disposed on the base for supplying gaseous fuel and air;

a housing disposed on the base, the housing having an interior cavity capable of providing mixed combustion of gaseous fuel and air;

the evaporator comprises a box body and a connecting pipe, wherein the box body is connected with the shell, a water inlet end and a water outlet end are formed in the side wall of the box body, the water inlet end is communicated with an external water source, the water outlet end is communicated with an inner cavity of the shell, the connecting pipe is arranged in the box body, and high-temperature gas generated by combustion of the inner cavity of the shell can flow through the connecting pipe so as to heat liquid water in the box body into water vapor.

Preferably, the shell comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell, a steam channel is arranged between the outer shell and the inner shell, the steam channel is communicated with the air outlet end of the box, a steam hole group is formed in the inner shell, and the steam hole group is communicated with the steam channel and the inner cavity of the inner shell.

Preferably, the hydrocarbon fuel autothermal reformer further includes a baffle, the baffle is disposed in an inner cavity of the inner shell, along a circumferential direction of the outer shell, the baffle is disposed at intervals with the inner shell, and the steam hole group includes a first steam hole, and the first steam hole is disposed opposite to the baffle, so that a water steam film is formed between the baffle and the inner shell.

Preferably, the number of the first steam holes is plural, and the plural first steam holes are arranged at intervals along the circumferential direction of the inner shell.

Preferably, the steam hole group further comprises second steam holes, the second steam holes are located above the first steam holes, the second steam holes are communicated with the steam channel, the number of the second steam holes is multiple, and the second steam holes are arranged at intervals.

Preferably, the evaporator further comprises a water inlet pipe and a steam pipe, the water inlet pipe is communicated with the box body, two ends of the steam pipe are respectively communicated with the box body and the steam channel, and a plurality of connecting pipes are arranged at intervals.

Preferably, the evaporator further comprises a vent valve and a switch valve, the switch valve and the vent valve are both arranged in the steam pipe, the vent valve is used for controlling the pressure in the box body, and the switch valve is used for controlling the on-off of steam in the steam pipe.

Preferably, the hydrocarbon fuel autothermal reformer further includes a guide sleeve, the guide sleeve is located in an inner cavity of the inner casing and sleeved on the supply assembly, the guide sleeve and the inner casing are arranged at intervals, the inner casing is further provided with an air inlet, and the guide sleeve and the air inlet are arranged opposite to each other, so that an air film is formed between the guide sleeve and the inner casing.

Preferably, the supply assembly comprises an air feeder, the air feeder is arranged on the base, the air feeder is provided with a rotational flow channel, the input end of the rotational flow channel is communicated with air, the output end of the rotational flow channel is communicated with the inner cavity of the inner shell, and the flow guiding sleeve can guide the air passing through the rotational flow channel to flow along the surface of the flow guiding sleeve.

Preferably, the supply assembly further comprises an injector which is annular and is inserted into the central hole of the supply assembly, the injector is provided with a fuel pipe and a nozzle, the fuel pipe is used for circumscribing gaseous fuel, the nozzle comprises a fuel cavity and a spray hole, the fuel cavity is communicated with the fuel pipe, and the spray hole is used for spraying fuel in the fuel cavity.

Preferably, an air pipe is provided on the inner side of the fuel pipe, the nozzle further includes a vent hole, and the ejector has an air cooling hole communicating the air pipe and the vent hole.

Preferably, the box comprises a top plate, a bottom plate and a ring plate connected between the top plate and the bottom plate, wherein a first through hole is formed in the top plate, a second through hole is formed in the bottom plate, and two ends of the connecting pipe are respectively communicated with the first through hole and the second through hole.

Preferably, the hydrocarbon fuel autothermal reformer further includes a locating pin disposed in the steam channel, and two ends of the locating pin are respectively abutted against an inner wall of the outer casing and an outer wall of the inner casing.

The beneficial effects of the utility model are as follows:

the utility model provides a hydrocarbon fuel autothermal reformer, a supply assembly is arranged on a base, the supply assembly is used for supplying gaseous fuel and air, a shell is arranged on the base, and the shell is provided with an inner cavity capable of providing mixed combustion of the gaseous fuel and the air. The evaporator is integrated to be set up on the casing, the evaporator includes box and connecting pipe, the box is connected in the casing, the box has the chamber of holding that is used for holding liquid water, the connecting pipe is arranged in and is held the chamber, mix the burning in the casing, the high temperature tail gas that its burning produced passes from the connecting pipe, liquid water gets into from the inlet end of evaporator, high temperature tail gas carries out high temperature heating to liquid water in the box, receive high temperature evaporation and produce gaseous water, enter into the casing at last, accomplish follow-up hydrocarbon fuel's reforming reaction, the device can realize burning simultaneously, water evaporation and reforming process, and a structure is compact, and is high-efficient energy-conserving.

Drawings

FIG. 1 is a cross-sectional view of an autothermal reformer of hydrocarbon fuel in accordance with an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an evaporator according to an embodiment of the utility model.

Reference numerals:

1. a base; 2. an outer housing; 3. an inner housing; 4. a first vapor vent; 5. a vapor passage; 6. a deflector; 7. a second vapor vent; 8. a diversion sleeve; 9. an air inlet hole; 10. an air supply device; 11. a swirl passage; 12. an ejector; 13. a fuel pipe; 14. a nozzle; 15. a water inlet pipe; 16. a case; 17. a connecting pipe; 18. a vapor tube; 19. a top plate; 20. a bottom plate; 21. a ring plate; 22. a blow-off valve; 23. a switch valve; 24. a positioning pin; 25. a spray hole; 26. and air cooling holes.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

A plurality of reaction tubes are arranged in a shell of the existing reforming device, and a fuel gas conveying tube and an air conveying tube are respectively communicated with the shell, so that gas serving as fuel and gas serving as combustion supporting are respectively conveyed to one end of the reforming reactor, which is provided with an ignition device, in the shell, for burning and heating, a water vapor input tube and a material conveying tube are respectively communicated with the reaction tubes in the shell, and water vapor and materials participating in reaction are respectively conveyed to the reaction tubes in the shell. However, the high-temperature flue gas input by the flue gas input pipe and used for supplying heat to the reaction pipe can be realized only by an external combustion device, and the structure is complex, and the energy consumption is low. In this regard, the present embodiment provides an autothermal reformer for hydrocarbon fuel, which can simultaneously realize the processes of combustion, water evaporation and reforming, has a compact structure, is highly integrated, and can provide high-temperature gas without connecting with additional combustion equipment, and is self-heating, efficient and energy-saving.

As shown in fig. 1 to 2, in the present embodiment, the hydrocarbon fuel autothermal reformer includes a base 1, a supply assembly, a housing, and an evaporator. Wherein, supply assembly sets up in base 1, and supply assembly is used for supplying gaseous fuel and air, and the casing sets up on base 1, and the casing has the inner chamber that can provide gaseous fuel and air mixed combustion. The evaporator comprises a box 16 and a connecting pipe 17, wherein the box 16 is connected to the shell, a water inlet end and a gas outlet end are formed in the side wall of the box 16, the water inlet end is communicated with an external water source, the gas outlet end is communicated with an inner cavity of the shell, the connecting pipe 17 is arranged in the box 16, and high-temperature gas generated by combustion of the inner cavity of the shell can flow through the connecting pipe 17 so that liquid water in the box 16 can be heated to steam. Specifically, the bottom of the housing is mounted to the base 1, the supply assembly is for supplying gaseous fuel and air to the interior cavity of the housing, and the evaporator is integrally provided on the housing for supplying water vapor. The holding chamber of box 16 is arranged in holding the chamber, and connecting pipe 17 is arranged in holding the chamber, carries out the mixed combustion in the casing, and the high temperature tail gas that its burning produced passes from connecting pipe 17, and liquid water gets into from the water inlet end of evaporimeter, and high temperature tail gas carries out high temperature heating to the liquid water in the box 16, receives high temperature evaporation and produces gaseous water, enters into the casing at last, accomplishes follow-up hydrocarbon fuel's reforming reaction, and the device can realize burning, water evaporation and reforming process simultaneously, compact structure, high-efficient energy-conservation.

Further, with continued reference to fig. 1-2, the housing includes an outer housing 2 and an inner housing 3, the inner housing 3 is disposed in an inner cavity of the outer housing 2, and the inner cavity of the inner housing 3 is communicated with an output end of the supply assembly, a vapor channel 5 is disposed between the inner housing 3 and the outer housing 2, the vapor channel 5 is disposed in communication with an air outlet end of the box 16, the inner housing 3 is provided with a vapor hole group, and the vapor hole group is communicated with the vapor channel 5 and the inner cavity of the inner housing 3. Specifically, the bottom of the inner shell 3 is mounted on the base 1, the outer shell 2 is sleeved on the inner shell 3, the inner shell 3 is sleeved on the supply assembly, the supply assembly is used for providing gaseous hydrocarbon fuel and air for the inner cavity of the inner shell 3, then the gaseous hydrocarbon fuel and the air are mixed and combusted in the inner cavity of the inner shell 3 to form a high-temperature combustion zone and high-concentration insufficiently combusted ions, and meanwhile, high temperature generated by combustion is transmitted to the evaporator. The top of the inner shell 3 is connected to the evaporator, the evaporator is communicated with the inner cavity of the inner shell 3, liquid water enters the evaporator, the liquid water is heated and evaporated in the evaporator to generate water vapor, the water vapor enters the vapor channel 5 between the outer shell 2 and the inner shell 3 through the air outlet end, and then enters the inner cavity of the inner shell 3 from the first vapor hole 4.

Further, with continued reference to fig. 1-2, the hydrocarbon fuel autothermal reformer further includes a baffle 6, where the baffle 6 is disposed in the inner cavity of the inner casing 3, and the baffle 6 is disposed at intervals from the inner casing 3 along the circumferential direction of the outer casing 2, and the steam hole group includes a first steam hole 4, and the baffle 6 is disposed opposite to the first steam hole 4, so that a water steam film is formed between the baffle 6 and the inner casing 3. Specifically, the water inlet end of the evaporator is communicated with an external water source, liquid water is heated and evaporated in the evaporator to generate water vapor, the water vapor enters a vapor channel 5 between the outer shell 2 and the inner shell 3, and then enters the inner cavity of the inner shell 3 from the first vapor hole 4. The guide plate 6 forms a uniformly distributed steam film by the steam passing through the first steam holes 4, and can fully cool the inner shell 3, thereby avoiding influencing the reforming reaction and ensuring the high efficiency of reforming and the requirement of high purity of gas products.

Further, with continued reference to fig. 1-2, the number of the first steam holes 4 is plural, and the plural first steam holes 4 are arranged at intervals along the circumferential direction of the inner housing 3. Specifically, the baffle 6 is in an annular structure, the plurality of first steam holes 4 are arranged around the baffle 6 at intervals and are in the same horizontal plane, namely, each first steam hole 4 is opposite to the baffle 6, and steam from the steam channel 5 enters the inner cavity of the inner shell 3 through the plurality of first steam holes 4, so that a uniformly distributed steam film is formed between the inner shell 3 and the baffle 6, the inner shell 3 is fully cooled, and the reforming reaction of the gaseous hydrocarbon fuel can be realized.

Further, with continued reference to fig. 1-2, the steam hole set further includes a second steam hole 7, the second steam hole 7 is located above the first steam hole 4, the second steam hole 7 is communicated with the steam channel 5, a plurality of second steam holes 7 are provided, and a plurality of second steam holes 7 are arranged at intervals. Specifically, the plurality of second steam holes 7 are equally spaced along the outer peripheral surface of the inner casing 3 and are in the same horizontal plane, and the steam in the steam channel 5 can also enter the inner cavity of the inner casing 3 from the second steam holes 7, so as to realize the normal proceeding of the subsequent reforming reaction.

Further, with continued reference to fig. 1-2, the hydrocarbon fuel autothermal reformer further includes a guide sleeve 8, where the guide sleeve 8 is located in the inner cavity of the inner casing 3 and sleeved on the supply assembly, the guide sleeve 8 is disposed at a distance from the inner casing 3, the inner casing 3 is further provided with an air inlet 9, and the guide sleeve 8 and the air inlet 9 are disposed opposite to each other, so that an air film is formed between the guide sleeve 8 and the inner casing 3. Specifically, water conservancy diversion cover 8 is loudspeaker form structure, and water conservancy diversion cover 8 includes big end and tip, and the output of supply assembly is located to the tip cover, and big end orientation inner chamber of inner shell 3, along the circumferencial direction of water conservancy diversion cover 8, the outer perisporium of water conservancy diversion cover 8 and the inner perisporium interval setting of inner shell 3, and outside air enters into the inner chamber of inner shell 3 through inlet port 9, under the effect of water conservancy diversion cover 8 for the air forms the air film between water conservancy diversion cover 8 and inner shell 3, can fully cool off inner shell 3, can also supplement combustible gas simultaneously.

Further, with continued reference to fig. 1-2, the supply assembly includes an air feeder 10, the air feeder 10 is disposed on the base 1, the air feeder 10 is provided with a swirl channel 11, an input end of the swirl channel 11 is communicated with air, an output end of the swirl channel 11 is communicated with an inner cavity of the inner housing 3, and the air passing through the swirl channel 11 can be guided by the guide sleeve 8 to flow along the surface thereof. Specifically, the swirl channel 11 is provided as an inclined hole, so that air flows through the swirl channel 11 and then forms swirl in the air feeder 10, and under the action of the guide plate 6, the air is guided to flow along the surface of the inner shell 3, so that the air and the gaseous hydrocarbon fuel are fully mixed, the combustion of the mixed fuel is fully ensured, and the combustion efficiency is improved.

Further, with continued reference to fig. 1-2, the supply assembly further includes an injector 12, the injector 12 being annular and inserted into a central bore of the supply assembly, the injector 12 being provided with a fuel tube 13 and a nozzle 14, the fuel tube 13 being adapted to circumscribe the gaseous fuel, the nozzle 14 including a fuel cavity and an orifice 25, the fuel cavity being in communication with the fuel tube 13, the orifice 25 being adapted to inject fuel within the fuel cavity. Specifically, gaseous hydrocarbon fuel enters from the fuel pipe 13, passes through the annular cavity of the injector 12, is sprayed out from the nozzle 14, and is mixed with air entering through the swirl passage 11 and the air inlet hole 9 for combustion, so that a high-temperature combustion area and high-concentration insufficiently combusted ions are formed, oxygen in the air is rapidly consumed, and the generation rate of nitrogen oxides is effectively inhibited.

Further, with continued reference to fig. 1-2, the evaporator further includes a water inlet pipe 15 and a vapor pipe 18, the water inlet pipe 15 is connected to the tank 16, two ends of the vapor pipe 18 are respectively connected to the tank 16 and the vapor channel 5, a plurality of connection pipes 17 are provided, and a plurality of connection pipes 17 are arranged at intervals. Specifically, the high-temperature gas generated by the combustion of the mixed fuel passes through the plurality of connecting pipes 17, liquid water enters the tank 16 from the water inlet pipe 15, the high-temperature gas heats the liquid water in the tank 16 at a high temperature, so that the liquid water is evaporated into water vapor, and the water vapor enters the vapor channel 5 through the vapor pipe 18, and the subsequent reforming reaction of hydrocarbon fuel is completed.

Further, with continued reference to fig. 1-2, the evaporator further includes a vent valve 22 and a switch valve 23, the switch valve 23 and the vent valve 22 are both disposed in the vapor tube 18, the vent valve 22 is used for controlling the pressure in the tank 16, and the switch valve 23 is used for controlling the on-off of the vapor in the vapor tube 18. Specifically, when the pressure in the evaporator exceeds the normal range, the vent valve 22 is opened to balance the internal and external air pressures of the evaporator, thereby ensuring the normal operation of the evaporator. By controlling the switch valve 23, the water vapor is introduced into the inner casing 3 or the water vapor is disconnected.

Further, with continued reference to fig. 1-2, the fuel pipe 13 is provided with an air line on the inside thereof, the nozzle 14 further includes a vent hole, and the injector 12 has an air cooling hole 26, and the air cooling hole 26 communicates with the air line and the vent hole. Specifically, a small portion of the air enters from the air pipe inside the fuel pipe 13, enters from the air cooling holes 26, and is ejected from the vent holes on the rear end face of the nozzle 14, effectively cooling the rear end face of the nozzle 14.

Further, with continued reference to fig. 1-2, the case 16 includes a top plate 19 and a bottom plate 20, and a ring plate 21 connecting between the top plate 19 and the bottom plate 20, the top plate 19 is provided with a first through hole, the bottom plate 20 is provided with a second through hole, and two ends of the connecting pipe 17 are respectively connected with the first through hole and the second through hole. Specifically, the connecting pipe 17 is communicated with the inner cavity of the inner shell 3 through the second through hole, the connecting pipe 17 is communicated with the tail gas pipe through the first through hole, hydrocarbon fuel is subjected to three severe physicochemical processes of combustion, water evaporation and reforming, and the rapidly generated combustible reformed gas such as hydrogen is discharged to an external water gas conversion device through the connecting pipe 17, so that high-purity hydrogen is finally obtained.

Further, with continued reference to fig. 1-2, the hydrocarbon fuel autothermal reformer further includes a locating pin 24, the locating pin 24 is disposed in the steam channel 5, and two ends of the locating pin 24 respectively abut against an inner wall of the outer casing 2 and an outer wall of the inner casing 3. To determine the distance of the inner housing 3 from the support of the outer housing 2, i.e. the spacing of the vapour channels 5.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (13)

1. An autothermal reformer for hydrocarbon fuel, comprising:

a base (1);

a supply assembly provided to the base (1) for supplying gaseous fuel and air;

a housing arranged on the base (1), the housing having an inner cavity capable of providing mixed combustion of gaseous fuel and air;

the evaporator comprises a box body (16) and a connecting pipe (17), wherein the box body (16) is connected to the shell, a water inlet end and a water outlet end are formed in the side wall of the box body (16), the water inlet end is communicated with an external water source, the water outlet end is communicated with an inner cavity of the shell, the connecting pipe (17) is arranged in the box body (16), and high-temperature gas generated by combustion of the inner cavity of the shell can flow through the connecting pipe (17) so that liquid water in the box body (16) can be heated into water vapor.

2. The hydrocarbon fuel autothermal reformer of claim 1, wherein said housing includes an outer housing (2) and an inner housing (3), said inner housing (3) being disposed within said outer housing (2), a vapor passage (5) being disposed between said outer housing (2) and said inner housing (3), said vapor passage (5) being disposed in communication with an outlet end of said tank (16), said inner housing (3) being provided with a set of vapor holes communicating said vapor passage (5) with an interior cavity of said inner housing (3).

3. The hydrocarbon fuel autothermal reformer of claim 2, further comprising a baffle (6), said baffle (6) being disposed in an inner cavity of said inner shell (3), said baffle (6) being disposed in spaced relation to said inner shell (3) along a circumferential direction of said outer shell (2), said set of steam holes comprising a first steam hole (4), said first steam hole (4) being disposed in facing relation to said baffle (6) such that a water-vapor film is formed between said baffle (6) and said inner shell (3).

4. A hydrocarbon fuel autothermal reformer in accordance with claim 3, wherein the number of said first vapor holes (4) is plural, and a plurality of said first vapor holes (4) are provided at intervals in the circumferential direction of said inner casing (3).

5. A hydrocarbon fuel autothermal reformer in accordance with claim 3, wherein said stack of steam holes further includes a second steam hole (7), said second steam hole (7) being located above said first steam hole (4), and said second steam hole (7) being in communication with said steam channel (5), a plurality of said second steam holes (7) being provided at intervals.

6. Hydrocarbon fuel autothermal reformer in accordance with claim 2, characterized in that the evaporator further comprises a water inlet pipe (15) and a vapor pipe (18), the water inlet pipe (15) is connected to the tank (16), two ends of the vapor pipe (18) are respectively connected to the tank (16) and the vapor passage (5), the connecting pipe (17) is provided with a plurality of connecting pipes (17) arranged at intervals.

7. The hydrocarbon fuel autothermal reformer of claim 6, wherein said vaporizer further includes a vent valve (22) and a switch valve (23), said switch valve (23) and said vent valve (22) are both disposed in said vapor tube (18), said vent valve (22) is used to control the pressure in said tank (16), and said switch valve (23) is used to control the on-off of water vapor in said vapor tube (18).

8. The hydrocarbon fuel autothermal reformer in accordance with claim 2, further comprising a guide sleeve (8), wherein the guide sleeve (8) is located in the inner cavity of the inner casing (3) and is sleeved on the supply assembly, the guide sleeve (8) is disposed at an interval with the inner casing (3), the inner casing (3) is further provided with an air inlet hole (9), and the guide sleeve (8) is disposed opposite to the air inlet hole (9), so that an air film is formed between the guide sleeve (8) and the inner casing (3).

9. The hydrocarbon fuel autothermal reformer of claim 8, wherein said feed assembly includes a gas supply (10), said gas supply (10) being disposed in said base (1), said gas supply (10) being provided with a swirl passage (11), an input of said swirl passage (11) being in communication with air, an output of said swirl passage (11) being in communication with an interior cavity of said inner housing (3), said air guiding sleeve (8) being capable of guiding air passing through said swirl passage (11) along a surface thereof.

10. Hydrocarbon fuel autothermal reformer in accordance with claim 1, characterized in that the supply assembly further comprises an injector (12), the injector (12) being annular and inserted into the central bore of the supply assembly, the injector (12) being provided with a fuel tube (13) and a nozzle (14), the fuel tube (13) being adapted to circumscribe gaseous fuel, the nozzle (14) comprising a fuel cavity and an injection orifice (25), the fuel cavity being in communication with the fuel tube (13), the injection orifice (25) being adapted to inject fuel within the fuel cavity.

11. Hydrocarbon fuel autothermal reformer in accordance with claim 10, characterized in that the fuel pipe (13) is provided inside with an air pipe, the nozzle (14) further comprising a vent hole, the injector (12) having an air cooling hole (26), the air cooling hole (26) communicating the air pipe and the vent hole.

12. The hydrocarbon fuel autothermal reformer of claim 1, wherein said tank (16) includes a top plate (19) and a bottom plate (20), and a ring plate (21) connecting between said top plate (19) and said bottom plate (20), said top plate (19) being provided with a first through hole, said bottom plate (20) being provided with a second through hole, and both ends of said connecting pipe (17) being respectively connected to said first through hole and said second through hole.

13. The hydrocarbon fuel autothermal reformer of claim 2, further comprising a locating pin (24), the locating pin (24) being disposed within the vapor passage (5), both ends of the locating pin (24) being respectively abutted against an inner wall of the outer casing (2) and an outer wall of the inner casing (3).