Alcohol hydrogen fuel range-extending type power system

Abstract

The utility model relates to an alcohol-hydrogen fuel range-extended power system, which comprises an alcohol-hydrogen engine, an electronic control unit (ECU), a reformer, a motor and a storage battery pack, a tail gas pipe of the alcohol-hydrogen engine is connected with a flue gas inlet pipe of the reformer, and an alcohol liquid connecting pipe of the reformer is connected with a hydrous ethanol tank through a hydrous ethanol pumping pipe; a first electromagnetic valve, a hydrous ethanol pump, a hydrous ethanol filter and a flow controller are installed on the hydrous ethanol pumping pipe, the gas outlet end of the reformer is connected with a buffer tank through a mixed gas pipe, the buffer tank is communicated with a feeding pipe of the alcohol hydrogen engine through a discharging pipe, and the feeding pipe is further connected with an ethanol tank through an electromagnetic reversing valve and the ethanol pumping pipe. An electromagnetic valve II, an ethanol pump and an ethanol filter are mounted on the ethanol pumping pipe; the ECU electronic controller is connected with the corresponding electromagnetic element in a matched mode. An output shaft of the alcohol-hydrogen engine is connected with a generator, and the generator is connected with the storage battery pack and the motor through a rectifying and voltage-stabilizing device. According to the system, the alcohol-hydrogen engine is used for acting to generate electricity, and the range extending purpose is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of range extender systems, specifically a range extender power system using alcohol-hydrogen fuel. Background Technology

[0002] Currently, electric vehicles are powered by onboard batteries, with electric motors driving the wheels. They offer advantages such as low noise, low pollution, and low operating costs. However, due to battery capacity limitations, their driving range is generally limited. Therefore, range extenders have emerged to meet people's needs for longer-distance travel.

[0003] A range extender is a generator installed on an electric vehicle to provide additional power, increasing the vehicle's range. Traditional range extenders mainly consist of a gasoline engine and a generator. When the gasoline generator is running, it converts the mechanical energy output by the gasoline generator into electrical energy.

[0004] To alleviate energy shortages and reduce environmental pollution, finding alternative energy sources and reducing harmful emissions have become two important topics in the field of internal combustion engine research. Ethanol and other low-carbon alcohols, due to their high hydrogen content, low cost, ease of storage, convenient transportation, and wide availability, have become the main focus of hydrogen production research. Ethanol, as a renewable fuel, can be produced from sugarcane, starch plants, and wild plants. Moreover, compared to methanol, ethanol has a higher specific energy and is non-toxic; compared to gasoline and diesel, ethanol has a simpler structure and fewer byproducts. Hydrogen, with its diverse sources, renewability, and clean and environmentally friendly characteristics, has become a research hotspot in the current new energy field. As a highly efficient and clean energy source, hydrogen is considered one of the clean energy sources for solving the energy crisis of the 21st century. Due to hydrogen's high calorific value and low emissions, as well as the improvement of internal combustion engine combustion by incorporating hydrogen, automobiles achieve higher thermal efficiency. Based on the advantages of ethanol and hydrogen, ethanol-hydrogen fuel range-extended power systems are expected to be widely used; however, ethanol-hydrogen fuel range-extended power systems are rarely reported, therefore, there is a need to design an ethanol-hydrogen fuel range-extended power system. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing an alcohol-hydrogen fuel range-extending power system. This alcohol-hydrogen fuel range-extending power system has an ingenious structure, stable hydrogen production, and can use ethanol as a raw material to provide fuel for the engine to do work, converting kinetic energy into electrical energy to achieve the purpose of extending the range.

[0006] This utility model is achieved using the following technical solution:

[0007] A hydrogen-fueled range-extended power system includes a hydrogen-fueled engine, an aqueous ethanol tank, an ethanol tank, an ECU electronic controller, a reformer, an electric motor, and a battery pack. The battery pack is connected to the electric motor. The exhaust pipe of the hydrogen-fueled engine is connected to the flue gas inlet pipe of the reformer. The alcohol inlet pipe of the reformer is connected to the aqueous ethanol tank via an aqueous ethanol pump pipe. The aqueous ethanol pump pipe is equipped with a solenoid valve, an aqueous ethanol pump, an aqueous ethanol filter, and a flow controller. The outlet of the reformer is connected to a buffer tank via a mixing pipe. The buffer tank is connected to the feed pipe of the hydrogen-fueled engine via a discharge pipe. The feed pipe is also connected to the ethanol tank via a solenoid reversing valve and an ethanol pump pipe. The ethanol pump pipe is equipped with a solenoid valve, an ethanol pump, and an ethanol filter. The solenoid valve, the aqueous ethanol pump, the flow controller, the solenoid valve, and the ethanol pump are matched and connected to the ECU electronic controller. The output shaft of the hydrogen-fueled engine is connected to a generator. The generator is connected to a rectifier and voltage regulator, which is connected to the battery pack and the electric motor respectively. The aqueous ethanol used is 75% ethanol, and the anhydrous ethanol is 99.9% ethanol. The generator, rectifier and voltage regulator, battery pack and motor are commercially available. Their connection control circuits are based on mature connection control circuits of existing hybrid electric vehicles, which are existing mature technologies and will not be elaborated on here.

[0008] The reformer includes a transversely arranged flue pipe. A flue gas inlet pipe and a flue gas outlet pipe are connected to the two ends of the flue pipe, respectively. An alcohol-liquid pipe is connected to the front end of the flue pipe, and a tube sheet is sealed to the rear end. A flue pipe flange is installed on the outer wall of the rear end of the flue pipe. The flue pipe flange is connected to an end cap that presses against the tube sheet via an end cap flange. The end cap is connected to a mixing pipe, and the end cap flange is mounted on the end cap. Multiple baffles are vertically spaced and fixedly connected inside the flue pipe to extend the flue gas travel distance. The baffles are circular discs with a portion cut off in a straight line, matching the inner diameter of the flue pipe. These baffles are alternately and non-sealedly connected to the upper and lower tube walls inside the flue pipe. The reformer is connected in an alternating manner, with the first baffle plate not sealed to the upper pipe wall and the second baffle plate not sealed to the lower pipe wall. A flow divider is located in the flue gas inlet pipe at the front end, and a catalyst chamber is located in the flue gas inlet pipe at the rear end. The catalyst chamber has a filling port for loading catalyst. A distribution chamber connected to the alcohol liquid inlet pipe is located within the flow divider. The distribution chamber is connected to the flow divider via multiple capillary tubes. The flow divider is connected to the catalyst chamber via multiple small heat exchange tubes. The catalyst chamber is connected to the end cap via multiple large heat exchange tubes. An outlet screen is located at the connection point between the large heat exchange tubes and the end cap, and an inlet screen is located at the connection point between the large heat exchange tubes and the catalyst chamber. After the reformer is assembled, a sealing test is required. The outlet and inlet screens have a mesh diameter of 3mm and a center-to-center distance of 4mm.

[0009] A further preferred embodiment: exhaust gas temperature sensors are installed in the flue gas inlet pipe and the flue gas outlet pipe respectively. The exhaust gas temperature sensors are matched and connected to the ECU electronic controller. The ECU electronic controller controls the operation of the electromagnetic reversing valve according to the temperature signal transmitted by the exhaust gas temperature sensor.

[0010] A further preferred embodiment: the baffle plate and tube sheet at the rear end of the catalyst chamber are respectively provided with large heat exchange tube through holes for passing through the large heat exchange tube.

[0011] A further preferred embodiment: the baffle plate at the front end of the catalyst chamber is provided with a small heat exchange tube through hole for passing through the small heat exchange tube.

[0012] A further preferred embodiment: the multiple capillary tubes are arranged symmetrically along the central reference axis of the flue pipe in an equilateral triangle configuration; the number of small heat exchange tubes is equal to the number of capillary tubes, and they are arranged in a one-to-one correspondence, with the ends of the capillary tubes furthest from the distribution chamber extending into the small heat exchange tubes. Three adjacent small heat exchange tubes are arranged in an equilateral triangle configuration, as are three adjacent large heat exchange tubes. This structural arrangement improves the stability of online hydrogen production from aqueous ethanol, exhibiting better stability than other structural arrangements.

[0013] A further preferred embodiment: the aqueous ethanol pumping pipe is also equipped with a manual shut-off valve one; the ethanol pumping pipe is also equipped with a manual shut-off valve two.

[0014] A further preferred embodiment: the aqueous ethanol pumping pipe is connected to a return pipe that communicates with the aqueous ethanol tank. A pressure regulating valve is installed on the return pipe. The pressure regulating valve is an electromagnetic pressure regulating valve. A pressure sensor is installed at the output end of the aqueous ethanol pumping pipe. The pressure sensor and the pressure regulating valve are matched and connected to the ECU electronic controller. The pressure sensor transmits the pressure signal to the ECU electronic controller. The ECU electronic controller adjusts and controls the pressure regulating valve according to the set program.

[0015] Further preferred embodiment: The buffer tank is equipped with a buffer tank pressure sensor and a buffer tank temperature sensor, the aqueous ethanol tank is equipped with an aqueous ethanol level sensor, and the ethanol tank is equipped with an ethanol level sensor. The buffer tank pressure sensor, buffer tank temperature sensor, aqueous ethanol level sensor, and ethanol level sensor are all matched and connected to the ECU electronic controller.

[0016] The ECU electronic controller also includes a monitoring panel for monitoring and displaying: water-containing ethanol, ethanol level, reformer temperature, buffer tank pressure and temperature, engine oil pressure, coolant temperature, fault alarms, etc.

[0017] The alcohol-hydrogen fuel cell range-extended power system has the following advantages:

[0018] 1. This alcohol-hydrogen fuel cell range extender power system uses an alcohol-hydrogen engine whose output shaft is connected to a generator. The generator is connected to a rectifier and voltage regulator, which is connected to both the battery pack and the electric motor. When the battery pack's power is insufficient, the alcohol-hydrogen engine is started to generate electricity. A reformer is installed in the exhaust pipe of the alcohol-hydrogen engine. When the alcohol-hydrogen engine starts, anhydrous ethanol is used as fuel. When the temperature of the reformer reaches the set value, aqueous ethanol is introduced into the reformer. The exhaust gas heats the introduced aqueous ethanol, and under the action of a catalyst, the aqueous ethanol is decomposed to produce hydrogen. The hydrogen is introduced into a buffer tank and used as fuel for the alcohol-hydrogen engine. Under normal operation, it can stably produce hydrogen to provide fuel for the alcohol-hydrogen engine, realizing the use of ethanol as a raw material to provide fuel for the engine to do work, converting kinetic energy into electrical energy, and achieving the purpose of range extension.

[0019] 2. The reformer employs multiple baffles vertically spaced and fixedly connected within the flue pipe to extend the flue gas travel distance, thereby improving heat exchange efficiency. A flow divider is located at the front end of the flue gas inlet pipe, and a catalyst chamber is located at the rear end of the flue gas inlet pipe. The catalyst chamber is filled with catalyst to improve conversion efficiency. A distribution chamber connected to the alcohol liquid pipe is located within the flow divider. The distribution chamber is connected to the flow divider via multiple capillary tubes, and the flow divider is connected to the catalyst chamber via multiple small heat exchange tubes. The catalyst chamber is connected to the end cap via multiple large heat exchange tubes. The arrangement of capillary tubes, flow divider, and small heat exchange tubes ensures a uniform supply of atomized aqueous ethanol to the catalyst chamber. The multiple large heat exchange tubes are less prone to clogging and eliminate the need for ceramic structures, thus reducing weight. Attached Figure Description

[0020] Figure 1 A schematic diagram of the layout structure of an alcohol-hydrogen fuel cell range-extended power system;

[0021] Figure 2 This is a schematic diagram of the reformer structure;

[0022] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0023] Figure 4 This is a schematic diagram of the tube sheet structure;

[0024] Figure 5 for Figure 4 A left-view diagram;

[0025] Figure 6 This is a schematic diagram of the baffle plate structure;

[0026] Figure 7 This is a schematic diagram of the capillary tube arrangement.

[0027] Figure 8 for Figure 7A left-view diagram;

[0028] Figure 9 for Figure 8 A top-down view;

[0029] The component names corresponding to the serial numbers in the diagram are:

[0030] 1. Flue flange; 2. Flue; 3. Flue gas inlet pipe; 4. Alcohol liquid inlet pipe; 5. Flue gas outlet pipe; 6. End cap; 7. Outlet screen; 8. Tube sheet; 9. End cap flange; 10. Large heat exchanger tube; 11. Baffle plate; 12. Inlet screen; 13. Catalyst chamber; 14. Small heat exchanger tube; 15. Diverter chamber; 16. Capillary tube; 17. Distribution chamber; 18. Large heat exchanger tube through hole; 19. Exhaust gas temperature sensor; 20. Alcohol-hydrogen engine; 21. Mixing pipe; 22. Feed pipe; 23. Buffer tank; 24. Buffer tank pressure sensor; 25. Buffer tank temperature sensor; 26. Discharge pipe; 27. Pressure regulating valve; 28. Return pipe 29. Aqueous ethanol tank; 30. Aqueous ethanol level sensor; 31. Manual shut-off valve 1; 32. Aqueous ethanol pump pipe; 33. Solenoid valve 1; 34. Aqueous ethanol pump; 35. Aqueous ethanol filter; 36. Flow controller; 37. Pressure sensor; 38. Ethanol level sensor; 39. Ethanol tank; 40. Manual shut-off valve 2; 41. Ethanol pump pipe; 42. Solenoid valve 2; 43. Ethanol pump; 44. Ethanol filter; 45. ECU electronic controller; 46. Reformer; 47. Exhaust pipe; 48. Solenoid directional valve; 49. Electric motor; 50. Battery pack; 51. Rectifier and voltage regulator; 52. Generator. Detailed Implementation

[0031] The technical solutions of the invention will be clearly and completely described below with reference to the embodiments. The described embodiments are only a part of the present utility model, and not all of the embodiments. Example

[0032] A hydrogen-ethanol fuel cell range extender power system includes a hydrogen-ethanol engine 20, an aqueous ethanol tank 29, an ethanol tank 39, an ECU electronic controller 45, a reformer 46, an electric motor 49, and a battery pack 50. The battery pack 50 is connected to the electric motor 49. The exhaust pipe 47 of the hydrogen-ethanol engine 20 is connected to the flue gas inlet pipe 3 of the reformer 46. The alcohol liquid inlet pipe 4 of the reformer 46 is connected to the aqueous ethanol tank 29 via an aqueous ethanol pump pipe 32. The aqueous ethanol pump pipe 32 is equipped with a solenoid valve 33, an aqueous ethanol pump 34, an aqueous ethanol filter 35, and a flow controller 36. The outlet of the reformer 46 is connected to a buffer via a mixing pipe 21. The flushing tank 23 and the buffer tank 23 are connected to the feed pipe 22 of the alcohol-hydrogen engine 20 through the discharge pipe 26. The feed pipe 22 is also connected to the ethanol tank 39 through the electromagnetic reversing valve 48 and the ethanol pump pipe 41. The ethanol pump pipe 41 is equipped with a second electromagnetic valve 42, an ethanol pump 43 and an ethanol filter 44. The first electromagnetic valve 33, the water-containing ethanol pump 34, the flow controller 36, the second electromagnetic valve 42 and the ethanol pump 43 are matched and connected to the ECU electronic controller 45. The output shaft of the alcohol-hydrogen engine 20 is connected to a generator 52. The generator 52 is connected to a rectifier and voltage regulator 51. The rectifier and voltage regulator 51 is connected to the battery pack 50 and the motor 49 respectively.

[0033] The reformer 46 includes a transversely arranged flue pipe 2. The two ends of the flue pipe 2 are connected to a flue gas inlet pipe 3 and a flue gas outlet pipe 5, respectively. The front end of the flue pipe 2 is connected to an alcohol-liquid pipe 4, and the rear end of the flue pipe 2 is sealed with a tube sheet 8. A flue pipe flange 1 is provided on the outer wall of the rear end of the flue pipe 2. The flue pipe flange 1 is connected to an end cap 6 that presses against the tube sheet 8 via an end cap flange 9. The end cap 6 is connected to a mixing pipe 21. The end cap flange 9 is mounted on the end cap 6. Multiple baffles 11 are vertically spaced and fixedly connected inside the flue pipe 2 to extend the flue gas travel distance. The baffles 11 are circular discs that match the inner diameter of the flue pipe 2 and have a portion cut off in a straight line. The multiple baffles 11 are alternately and non-sealed with the upper and lower pipe walls inside the flue pipe 2. The connection is an alternating connection method in which the first baffle plate 11 is not connected to the upper pipe wall and the second baffle plate 11 is not connected to the lower pipe wall. A diversion chamber 15 is provided in the flue pipe 2 at the front end of the flue gas inlet pipe 3, and a catalyst chamber 13 is provided in the flue pipe 2 at the rear end of the flue gas inlet pipe 3. A distribution chamber 17 connected to the alcohol liquid pipe 4 is provided in the diversion chamber 15. The distribution chamber 17 is connected to the diversion chamber 15 through multiple capillary tubes 16. The diversion chamber 15 is connected to the catalyst chamber 13 through multiple small heat exchange tubes 14. The catalyst chamber 13 is connected to the end cap 6 through multiple large heat exchange tubes 10. An outlet screen 7 is provided at the connection end between the large heat exchange tubes 10 and the end cap 6. An inlet screen 12 is provided at the connection end between the large heat exchange tubes 10 and the catalyst chamber 13.

[0034] The exhaust gas inlet pipe 3 and the exhaust gas outlet pipe 5 are respectively equipped with exhaust gas temperature sensors 19. The exhaust gas temperature sensors 19 are matched and connected to the ECU electronic controller 45. The ECU electronic controller 45 controls the operation of the electromagnetic reversing valve 48 according to the temperature signal transmitted by the exhaust gas temperature sensors 19.

[0035] Both the baffle plate 11 and the tube sheet 8 at the rear end of the catalyst chamber 13 are provided with large heat exchange tube through holes 18 for passing through the large heat exchange tube 10.

[0036] The catalyst chamber 13 has a baffle plate 11 at the front end with a small heat exchange tube through hole for passing through the small heat exchange tube 14.

[0037] The multiple capillary tubes 16 are arranged in an equilateral triangle, symmetrically along the central reference axis of the flue pipe 2. The number of small heat exchange tubes 14 is equal to the number of capillary tubes 16, and they are arranged in a one-to-one correspondence. The ends of the capillary tubes 16 that are away from the distribution chamber 17 extend into the small heat exchange tubes 14.

[0038] The aqueous ethanol pumping pipe 32 is also equipped with a manual shut-off valve 31; the ethanol pumping pipe 41 is also equipped with a manual shut-off valve 40.

[0039] The aqueous ethanol pumping pipe 32 is connected to a return pipe 28 that communicates with the aqueous ethanol tank 29. A pressure regulating valve 27 is installed on the return pipe 28. The pressure regulating valve 27 is an electromagnetic pressure regulating valve. A pressure sensor 37 is installed at the output end of the aqueous ethanol pumping pipe 32. The pressure sensor 37 and the pressure regulating valve 27 are matched and connected to the ECU electronic controller 45. The pressure sensor 37 transmits the pressure signal to the ECU electronic controller 45. The ECU electronic controller 45 adjusts and controls the pressure regulating valve 27 according to the set program.

[0040] The buffer tank 23 is equipped with a buffer tank pressure sensor 24 and a buffer tank temperature sensor 25. The aqueous ethanol tank 29 is equipped with an aqueous ethanol level sensor 30. The ethanol tank 39 is equipped with an ethanol level sensor 38. The buffer tank pressure sensor 24, buffer tank temperature sensor 25, aqueous ethanol level sensor 30, and ethanol level sensor 38 are all matched and connected to the ECU electronic controller 45.

[0041] The working process of the alcohol-hydrogen fuel cell range extender power system is as follows: The battery pack 50 supplies power to the electric motor 49. When the battery pack 50 is low on power, the ECU electronic controller 45 controls the alcohol-hydrogen engine 20 to ignite and operate. Anhydrous ethanol in the ethanol tank 39 is pumped into the engine as fuel by the ethanol pump 43. The flow rate is regulated by the solenoid valve 42 and filtered by the ethanol filter 44. The exhaust gas generated by the alcohol-hydrogen engine 20 enters the flue gas pipe 2 from the flue gas inlet pipe 3. It is blocked and guided by the baffle plate 11 to extend the travel distance and finally discharged from the flue gas outlet pipe 5. The exhaust gas exchanges heat with the reformer 46. When the temperature of the reformer 46 reaches the set value, the aqueous ethanol in the aqueous ethanol tank 29 is pumped into the reformer 46. The aqueous ethanol filter 35 filters the aqueous ethanol. The solenoid valve 33 and the flow controller 36 control the flow rate of the aqueous ethanol. The pressure regulating valve 27 regulates the pressure so that the aqueous ethanol at the appropriate pressure and flow rate is introduced into the reformer 46. Aqueous ethanol enters the distribution chamber 17 from the alcohol inlet 4, passes through the capillary tube 16 and exits into the diversion chamber 15 and the small heat exchange tube 14, then enters the catalyst chamber 13 through the small heat exchange tube 14. The catalyst chamber 13 is pre-filled with particulate catalyst. After catalysis by contacting the catalyst, the ethanol enters the large heat exchange tube 10, is guided to the end cap 6 through the large heat exchange tube 10, and exits from the outlet provided on the end cap 6. During its journey, the flue gas exchanges heat with the small heat exchange tube 14 and the large heat exchange tube 10, thus improving the heat exchange performance of the flue gas. 0 heating is used to achieve the catalytic cracking of anhydrous ethanol. The gas produced by cracking is transported to the buffer tank 23. When the pressure and temperature in the buffer tank 23 reach the appropriate value, the electromagnetic reversing valve 48 cuts off the supply of anhydrous ethanol and transports the gas in the buffer tank 23 as fuel for the alcohol-hydrogen engine 20. The alcohol-hydrogen engine 20 drives the generator 52 to generate electricity. The generated electricity is rectified and stabilized by the rectifier and voltage regulator 51 and then supplies power to the motor 49. The battery pack 50 is disconnected from the motor 49, and the excess electricity is used to charge the battery pack 50.

[0042] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A range-extended power system for alcohol-hydrogen fuel cell, comprising an alcohol-hydrogen engine (20), an aqueous ethanol tank (29), an ethanol tank (39), an ECU electronic controller (45), a reformer (46), an electric motor (49), and a battery pack (50), wherein the battery pack (50) is connected to the electric motor (49), and the exhaust pipe (47) of the alcohol-hydrogen engine (20) is connected to the flue gas inlet pipe (3) of the reformer (46), characterized in that: The alcohol inlet pipe (4) of the reformer (46) is connected to the aqueous ethanol tank (29) via the aqueous ethanol pump pipe (32). The aqueous ethanol pump pipe (32) is equipped with a solenoid valve (33), an aqueous ethanol pump (34), an aqueous ethanol filter (35), and a flow controller (36). The outlet of the reformer (46) is connected to a buffer tank (23) via a mixing pipe (21). The buffer tank (23) is connected to the feed pipe (22) of the alcohol-hydrogen engine (20) via a discharge pipe (26). The feed pipe (22) is also connected to the ethanol pump pipe (49) via a solenoid reversing valve (48). 1) Connected to the ethanol tank (39), the ethanol pump pipe (41) is equipped with solenoid valve 2 (42), ethanol pump (43) and ethanol filter (44); solenoid valve 1 (33), water-containing ethanol pump (34), flow controller (36), solenoid valve 2 (42) and ethanol pump (43) are matched and connected to ECU electronic controller (45); the output shaft of the alcohol-hydrogen engine (20) is connected to generator (52), generator (52) is connected to rectifier and voltage regulator (51), rectifier and voltage regulator (51) is connected to battery pack (50) and motor (49) respectively.

2. The alcohol-hydrogen fuel range-extended power system according to claim 1, characterized in that: The reformer (46) includes a transversely arranged flue (2), with a flue gas inlet pipe (3) and a flue gas outlet pipe (5) correspondingly connected to the pipe walls at both ends. The flue (2) is characterized by: an alcohol liquid connector (4) connected to the front end of the flue (2); a tube sheet (8) sealing the rear end of the flue (2); a flue flange (1) provided on the outer wall of the rear end of the flue (2); the flue flange (1) connected to an end cap (6) of the tube sheet (8) via an end cap flange (9); the end cap (6) communicating with the mixing pipe (21); and multiple baffles (11) vertically spaced and fixedly connected inside the flue (2) to extend the flue gas travel distance. The flue (2) is located at the front end of the flue gas inlet pipe (3). (2) A diversion chamber (15) is provided inside. A catalyst chamber (13) is provided inside the flue pipe (2) at the rear end of the flue gas inlet pipe (3). A distribution chamber (17) connected to the alcohol liquid pipe (4) is provided inside the diversion chamber (15). The distribution chamber (17) is connected to the diversion chamber (15) through multiple capillary tubes (16). The diversion chamber (15) is connected to the catalyst chamber (13) through multiple small heat exchange tubes (14). The catalyst chamber (13) is connected to the end cap (6) through multiple large heat exchange tubes (10). An outlet screen (7) is provided at the connection end between the large heat exchange tube (10) and the end cap (6). An inlet screen (12) is provided at the connection end between the large heat exchange tube (10) and the catalyst chamber (13).

3. The alcohol-hydrogen fuel range-extended power system according to claim 2, characterized in that: The exhaust gas inlet pipe (3) and exhaust gas outlet pipe (5) are respectively equipped with exhaust gas temperature sensors (19). The exhaust gas temperature sensors (19) are matched and connected to the ECU electronic controller (45). The ECU electronic controller (45) controls the operation of the electromagnetic reversing valve (48) according to the temperature signal transmitted by the exhaust gas temperature sensor (19).

4. The alcohol-hydrogen fuel range-extended power system according to claim 2, characterized in that: Both the baffle (11) and the tube sheet (8) at the rear end of the catalyst chamber (13) are provided with large heat exchange tube through holes (18) for passing through the large heat exchange tube (10).

5. The alcohol-hydrogen fuel range-extended power system according to claim 2 or 4, characterized in that: The catalyst chamber (13) has a baffle plate (11) at the front end with a small heat exchange tube through hole for passing through the small heat exchange tube (14).

6. The alcohol-hydrogen fuel range-extended power system according to claim 2, characterized in that: The multiple capillary tubes (16) are symmetrical about the central reference axis of the flue (2) and arranged in an equilateral triangle. The number of small heat exchange tubes (14) is equal to the number of capillary tubes (16) and they are set in a one-to-one correspondence. The end of the capillary tube (16) away from the distribution chamber (17) extends into the small heat exchange tube (14).

7. The alcohol-hydrogen fuel range-extended power system according to claim 2, characterized in that: The three adjacent large heat exchange tubes are arranged in an equilateral triangle.

8. The alcohol-hydrogen fuel range-extended power system according to claim 1, characterized in that: The aqueous ethanol pumping pipe (32) is also equipped with a manual shut-off valve one (31); the ethanol pumping pipe (41) is also equipped with a manual shut-off valve two (40).

9. The alcohol-hydrogen fuel range-extended power system according to claim 1, characterized in that: The aqueous ethanol pumping pipe (32) is connected to a return pipe (28) that is connected to the aqueous ethanol tank (29). A pressure regulating valve (27) is installed on the return pipe (28). The pressure regulating valve (27) is an electromagnetic pressure regulating valve. A pressure sensor (37) is installed at the output end of the aqueous ethanol pumping pipe (32). The pressure sensor (37) and the pressure regulating valve (27) are matched and connected to the ECU electronic controller (45). The pressure sensor (37) transmits the pressure signal to the ECU electronic controller (45). The ECU electronic controller (45) adjusts and controls the pressure regulating valve (27) according to the set program.

10. The alcohol-hydrogen fuel range-extended power system according to claim 1, characterized in that: The buffer tank (23) is equipped with a buffer tank pressure sensor (24) and a buffer tank temperature sensor (25). The aqueous ethanol tank (29) is equipped with an aqueous ethanol level sensor (30). The ethanol tank (39) is equipped with an ethanol level sensor (38). The buffer tank pressure sensor (24), buffer tank temperature sensor (25), aqueous ethanol level sensor (30) and ethanol level sensor (38) are all matched and connected to the ECU electronic controller (45).

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