Water-containing ethanol reforming on-line hydrogen production power system

Abstract

A hydrous ethanol reforming online hydrogen production power system comprises an ethanol-hydrogen engine, a hydrous ethanol tank, an ethanol tank, an ECU (electronic control unit) and a reformer, a tail gas pipe of the ethanol-hydrogen engine is connected with a flue gas inlet pipe of the reformer, and an alcohol liquid inlet connecting pipe of the reformer is connected with the 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 an 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 first electromagnetic valve, the hydrous ethanol pump, the flow controller, the second electromagnetic valve and the ethanol pump are connected with the ECU in a matched mode. The system is ingenious in structure arrangement, and has the advantages of stable hydrogen production, high heat exchange efficiency and conversion rate and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydrogen production of aqueous ethanol, and particularly relates to an aqueous ethanol reforming online hydrogen production power system. BACKGROUND

[0002] In order to alleviate energy shortage and reduce environmental pollution, finding alternative energy and reducing harmful emissions are becoming two important issues in the field of internal combustion engine research. Low-carbon alcohols such as ethanol have become the main object of hydrogen production research due to their high hydrogen content, low cost, easy storage, convenient transportation, and wide sources. Ethanol, as a renewable fuel, can be obtained from sugarcane, starch plants, and wild plants. Moreover, compared with methanol, ethanol has high specific energy and no toxicity; compared with gasoline and diesel, ethanol has a simple structure and fewer by-products. However, due to the low calorific value of ethanol, almost all ethanol fuel applications today are mixed with a certain proportion of ethanol in ordinary gasoline, and the dependence on mineral resources such as gasoline has not been eliminated, and the automobile emission pollution has not been completely improved.

[0003] Hydrogen has become a research hotspot in the field of new energy due to its diverse sources, renewability, and outstanding characteristics such as environmental protection. Hydrogen, as a high-efficiency and clean energy, is considered to be one of the clean energies to solve the energy crisis of human society in the 21st century. Due to the high heat value and low emission of hydrogen, and the improvement of internal combustion engine combustion by adding hydrogen, the automobile obtains higher thermal efficiency, and is expected to be widely used. However, hydrogen has problems such as high production cost, storage and transportation difficulties.

[0004] The existing hydrogen-doped engine test and theoretical research have proved that hydrogen-doped fuel has broad application prospects in engines. The current hydrogen production methods mainly include fossil fuel reforming and water electrolysis. However, the acquisition method, storage and transportation technology of hydrogen make it difficult for hydrogen-doped engines to be truly promoted in practice. If cheap and renewable bioethanol is used instead of hydrogen, and bioethanol is reformed into hydrogen using engine exhaust heat, real-time hydrogen supply for automobile engines will provide new ideas and directions for the market promotion of hydrogen-doped combustion engines. At the same time, on-board online hydrogen production also eliminates the storage and transportation of hydrogen, making it possible to apply and promote hydrogen fuel in engines. The reforming gas generated by using the waste heat of automobile engines to catalyze aqueous ethanol is rich in H2, CH4 and CO, etc. This kind of reforming gas is very suitable for engine combustion and can be directly used without any purification treatment.

[0005] Through investigation and research, it is found that the currently used online hydrogen production power system has the problems of unstable hydrogen production, low heat exchange efficiency and low conversion rate, which is difficult to meet the demand of real-time hydrogen supply for continuous operation of automobile engines. Therefore, it is necessary to design an aqueous ethanol reforming online hydrogen production power system with high heat exchange efficiency and conversion rate. SUMMARY

[0006] The utility model discloses a kind of online hydrogen production power systems of aqueous ethanol reforming, and the online hydrogen production power systems of aqueous ethanol reforming structure is ingeniously arranged, with the advantages of hydrogen production stability, heat exchange efficiency and conversion rate higher.

[0007] The utility model is implemented by the following technical solutions:

[0008] An online hydrogen production power system of aqueous ethanol reforming includes an alcohol-hydrogen engine, an aqueous ethanol tank, an ethanol tank, an ECU electronic controller and a reformer. The tail gas pipe of the alcohol-hydrogen engine is connected with the flue gas inlet pipe of the reformer. The alcohol liquid inlet pipe of the reformer is connected with the aqueous ethanol tank through an aqueous ethanol pumping pipe. An electromagnetic valve one, an aqueous ethanol pump, an aqueous ethanol filter and a flow controller are installed on the aqueous 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 the feed pipe of the alcohol-hydrogen engine through a discharge pipe. The feed pipe is also connected with the ethanol tank through an electromagnetic reversing valve and an ethanol pumping pipe. An electromagnetic valve two, an ethanol pump and an ethanol filter are installed on the ethanol pumping pipe. The electromagnetic valve one, the aqueous ethanol pump, the flow controller, the electromagnetic valve two and the ethanol pump are matched with the ECU electronic controller. The aqueous ethanol is 75% ethanol, and the ethanol is anhydrous ethanol, i.e. 99.9% ethanol.

[0009] The reformer includes a transversely arranged flue pipe. The two ends of the flue pipe are connected with a flue gas inlet pipe and a flue gas outlet pipe through corresponding pipe walls. The front end surface of the flue pipe is communicated with an alcohol liquid inlet pipe. The rear end surface of the flue pipe is blocked with a pipe plate. The outer pipe wall of the rear end of the flue pipe is provided with a flue pipe flange. The flue pipe flange is connected with an end cover through an end cover flange. The end cover is in contact with the pipe plate. The end cover is communicated with a mixed gas pipe. The end cover flange is arranged on the end cover. A plurality of baffle plates for extending the walking distance of flue gas are fixedly connected in the flue pipe in a vertical and spaced manner. The baffle plates are circular cakes that are matched with the inner diameter of the flue pipe and have a part cut away in a straight line. The plurality of baffle plates are alternately and non-sealingly connected with the upper end pipe wall and the lower end pipe wall in the flue pipe, i.e. the first baffle plate is not connected and sealed with the upper end pipe wall, and the second baffle plate is not connected and sealed with the lower end pipe wall in an alternating connection mode. A shunt bin is arranged in the flue pipe at the front end of the flue gas inlet pipe. A catalyst bin is arranged in the flue pipe at the rear end of the flue gas inlet pipe. The catalyst bin is provided with a filling port for filling catalyst. A distribution bin is arranged in the shunt bin and communicated with the alcohol liquid inlet pipe. The distribution bin is communicated with the shunt bin through a plurality of capillary tubes. The shunt bin is communicated with the catalyst bin through a plurality of small heat exchange pipes. The catalyst bin is communicated with the end cover through a plurality of large heat exchange pipes. The communication end of the large heat exchange pipe with the end cover is provided with an outlet screen. The communication end of the large heat exchange pipe with the catalyst bin is provided with an inlet screen. The reformer needs to be sealed after assembly. The screen hole diameter of the outlet screen and the inlet screen is 3 mm, and the hole center distance is 4 mm.

[0010] Further preferably, tail gas temperature sensors are installed in the flue gas inlet pipe and the flue gas outlet pipe respectively, and the tail gas temperature sensors are matched with the ECU electronic controller, and the ECU electronic controller controls the electromagnetic reversing valve according to the temperature signal transmitted by the tail gas temperature sensors.

[0011] Further preferably, the baffle plate at the rear end of the catalyst bin and the tube plate are both provided with large heat exchange pipe passing holes for the large heat exchange pipes to pass through.

[0012] Further preferably, the baffle plate at the front end of the catalyst bin is provided with small heat exchange pipe passing holes for the small heat exchange pipes to pass through.

[0013] Further preferably, the plurality of capillary tubes are arranged in a central symmetry along the central reference axis of the flue pipe, and are arranged in an equilateral triangle; the number of the small heat exchange pipes is equal to the number of the capillary tubes, and the capillary tubes are arranged in a one-to-one correspondence and extend into the small heat exchange pipes from the distribution bin end; the adjacent three small heat exchange pipes are arranged in an equilateral triangle, and the adjacent three large heat exchange pipes are also arranged in an equilateral triangle. Such a structure arrangement can improve the stability of the online hydrogen production from the aqueous ethanol, and is better than other structure arrangements.

[0014] Further preferably, a manual stop valve one is installed on the aqueous ethanol pumping pipe.

[0015] Further preferably, a reflux pipe communicating with the aqueous ethanol tank is connected to the aqueous ethanol pumping pipe, a pressure regulating valve is installed on the reflux 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 with the ECU electronic controller, the pressure sensor transmits a pressure signal to the ECU electronic controller, and the ECU electronic controller adjusts and controls the pressure regulating valve according to a set program.

[0016] Further preferably, a buffer tank pressure sensor and a buffer tank temperature sensor are installed in the buffer tank, an aqueous ethanol liquid level sensor is installed in the aqueous ethanol tank, and an ethanol liquid level sensor is installed in the ethanol tank, and the buffer tank pressure sensor, the buffer tank temperature sensor, the aqueous ethanol liquid level sensor and the ethanol liquid level sensor are matched with the ECU electronic controller.

[0017] The total reaction equation of the aqueous ethanol is as follows:

[0018]

[0019] High temperature, low pressure and high water-alcohol ratio are conducive to improving the yield and selectivity of hydrogen. The reaction rate is related to the mass of the catalyst and the flow of the aqueous alcohol.

[0020] The ECU electronic controller also contains a monitoring panel for monitoring display: water-containing ethanol, ethanol level, reformer temperature, buffer tank pressure, temperature, engine oil pressure, cooling water temperature, fault alarm, etc.

[0021] The online hydrogen production system of the water-containing ethanol reforming is installed with a reformer in the tail gas 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, water-containing ethanol is introduced into the reformer, the introduced water-containing ethanol is heated by the tail gas, and hydrogen is generated by cracking the water-containing ethanol under the action of the catalyst. The hydrogen is introduced into the buffer tank, and the hydrogen in the buffer tank is used as fuel for the alcohol hydrogen engine. The reformer can stably produce hydrogen for the alcohol hydrogen engine when it is working normally. The reformer is fixedly connected with multiple baffle plates for prolonging the walking distance of flue gas in the vertical direction in the flue pipe, thereby improving the heat exchange efficiency. A shunt bin is arranged in the flue pipe at the front end of the flue gas inlet pipe, and a catalyst bin is arranged in the flue pipe at the rear end of the flue gas inlet pipe. The catalyst bin is filled with catalysts, thereby improving the conversion efficiency. A distribution bin in communication with the alcohol liquid inlet pipe is arranged in the shunt bin. The distribution bin is in communication with the shunt bin through multiple capillary tubes. The shunt bin is in communication with the catalyst bin through multiple small heat exchange pipes. The catalyst bin is in communication with the end cover through multiple large heat exchange pipes. The capillary tubes, the shunt bin and the small heat exchange pipes can uniformly provide the misty water-containing ethanol to the catalyst bin. The multiple large heat exchange pipes are not easy to cause blockage, and do not need to be provided with a ceramic structure, thereby reducing the weight. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a layout structure diagram of the water-containing ethanol reforming online hydrogen production system.

[0023] Figure 2 It is a structure diagram of the reformer.

[0024] Figure 3 It is Figure 2 It is a left view schematic diagram of A-A.

[0025] Figure 4 It is a structure diagram of the tube sheet.

[0026] Figure 5 It is Figure 4 It is a left view schematic diagram of A-A.

[0027] Figure 6 It is a structure diagram of the baffle plate.

[0028] Figure 7 It is a layout structure diagram of the capillary tube.

[0029] Figure 8 It is Figure 7 It is a left view schematic diagram of A-A.

[0030] Figure 9 Fig. 1 is a schematic view of the present application from the top; Figure 8 Fig. 2 is a schematic view of the present application from the side;

[0031] The component names corresponding to the serial numbers in the figure are as follows:

[0032] 1, flange of smoke pipe; 2, smoke pipe; 3, smoke gas inlet pipe; 4, alcohol liquid inlet pipe; 5, smoke gas outlet pipe; 6, end cover; 7, outlet screen; 8, tube sheet; 9, flange of end cover; 10, large heat exchange pipe; 11, baffle plate; 12, inlet screen; 13, catalyst bin; 14, small heat exchange pipe; 15, distribution bin; 16, capillary tube; 17, distribution bin; 18, hole through which large heat exchange pipe passes; 19, tail gas temperature sensor; 20, alcohol hydrogen engine; 21, mixed gas pipe; 22, feed pipe; 23, buffer tank; 24, pressure sensor of buffer tank; 25, temperature sensor of buffer tank; 26, discharge pipe; 27, pressure regulating valve; 28, return pipe; 29, water-containing ethanol tank; 30, liquid level sensor of water-containing ethanol; 31, hand-operated stop valve one; 32, water-containing ethanol pumping pipe; 33, electromagnetic valve one; 34, water-containing ethanol pump; 35, water-containing ethanol filter; 36, flow controller; 37, pressure sensor; 38, ethanol liquid level sensor; 39, ethanol tank; 40, hand-operated stop valve two; 41, ethanol pumping pipe; 42, electromagnetic valve two; 43, ethanol pump; 44, ethanol filter; 45, ECU electronic controller; 46, reformer; 47, tail gas pipe; 48, electromagnetic reversing valve. DETAILED DESCRIPTION

[0033] The technical solutions in the present application will be described clearly and completely in combination with the embodiments below, and the described embodiments are only a part of the present application, rather than all the embodiments. EMBODIMENT

[0034] A water-containing ethanol reforming online hydrogen production system, comprising an alcohol hydrogen engine 20, a water-containing ethanol tank 29, an ethanol tank 39, an ECU electronic controller 45 and a reformer 46, a tail gas pipe 47 of the alcohol hydrogen engine 20 is connected with a smoke gas inlet pipe 3 of the reformer 46, an alcohol liquid inlet pipe 4 of the reformer 46 is connected with the water-containing ethanol tank 29 through a water-containing ethanol pumping pipe 32, an electromagnetic valve one 33, a water-containing ethanol pump 34, a water-containing ethanol filter 35 and a flow controller 36 are installed on the water-containing ethanol pumping pipe 32, a buffer tank 23 is connected with a feed pipe 22 of the alcohol hydrogen engine 20 through a mixed gas pipe 21 at a gas outlet end of the reformer 46, the buffer tank 23 is communicated with the feed pipe 22 of the alcohol hydrogen engine 20 through a discharge pipe 26, the feed pipe 22 is further connected with the ethanol tank 39 through an electromagnetic reversing valve 48 and an ethanol pumping pipe 41, an electromagnetic valve two 42, an ethanol pump 43 and an ethanol filter 44 are installed on the ethanol pumping pipe 41; the electromagnetic valve one 33, the water-containing ethanol pump 34, the flow controller 36, the electromagnetic valve two 42 and the ethanol pump 43 are matched and connected with the ECU electronic controller 45.

[0035] The reformer 46 comprises a transversely arranged smoke pipe 2, both ends of the smoke pipe 2 are correspondingly connected with a flue gas inlet pipe 3 and a flue gas outlet pipe 5, the front end surface of the smoke pipe 2 is communicated with an alcohol liquid inlet connecting pipe 4, the rear end surface of the smoke pipe 2 is blocked with a pipe plate 8, the rear end outer pipe wall of the smoke pipe 2 is provided with a smoke pipe flange 1, the smoke pipe flange 1 is connected with an end cover 6 pressing the pipe plate 8 through an end cover flange 9, the end cover 6 is communicated with a mixed gas pipe 21, the end cover flange 9 is arranged on the end cover 6, a plurality of baffle plates 11 for prolonging the flue gas walking distance are fixedly connected in the smoke pipe 2 in vertical intervals, the baffle plate 11 is a circular cake matching the inner diameter of the smoke pipe 2 and cutting off a part in a straight line, the plurality of baffle plates 11 are alternately and non-sealingly connected with the upper end pipe wall and the lower end pipe wall in the smoke pipe 2, that is, the first baffle plate 11 is not connected and sealed with the upper end pipe wall, the second baffle plate 11 is not connected and sealed with the lower end pipe wall in an alternating connection mode, a shunt bin 15 is arranged in the smoke pipe 2 at the front end of the flue gas inlet pipe 3, a catalyst bin 13 is arranged in the smoke pipe 2 at the rear end of the flue gas inlet pipe 3, a distribution bin 17 communicated with the alcohol liquid inlet connecting pipe 4 is arranged in the shunt bin 15, the distribution bin 17 is communicated with the shunt bin 15 through a plurality of capillary tubes 16, the shunt bin 15 is communicated with the catalyst bin 13 through a plurality of small heat exchange pipes 14, the catalyst bin 13 is communicated with the end cover 6 through a plurality of large heat exchange pipes 10, the large heat exchange pipe 10 is provided with an outlet screen 7 at the communicated end of the end cover 6, the large heat exchange pipe 10 is provided with an inlet screen 12 at the communicated end of the catalyst bin 13.

[0036] The flue gas inlet pipe 3 and the flue gas outlet pipe 5 are respectively provided with a tail gas temperature sensor 19, the tail gas temperature sensor 19 is matched and connected with an ECU electronic controller 45, the ECU electronic controller 45 controls the working of an electromagnetic reversing valve 48 according to the temperature signal transmitted by the tail gas temperature sensor 19.

[0037] The baffle plate 11 at the rear end of the catalyst bin 13 and the pipe plate 8 are both correspondingly provided with a large heat exchange pipe passing hole 18 for passing through the large heat exchange pipe 10.

[0038] The baffle plate 11 at the front end of the catalyst bin 13 is correspondingly provided with a small heat exchange pipe passing hole for passing through the small heat exchange pipe 14.

[0039] The plurality of capillary tubes 16 are central symmetrical along the central reference axis of the smoke pipe 2 and arranged in a regular triangle; the number of the small heat exchange pipes 14 is equal to the number of the capillary tubes 16 and is correspondingly arranged, the capillary tube 16 extends into the small heat exchange pipe 14 at the end away from the distribution bin 17.

[0040] The water-containing ethanol pumping pipe 32 is further provided with a manual stop valve one 31; the ethanol pumping pipe 41 is further provided with a manual stop valve two 40.

[0041] The water-containing ethanol pump pipe 32 is connected with a backflow pipe 28 which communicates with the water-containing ethanol tank 29, and a pressure regulating valve 27 is installed on the backflow pipe 28. The pressure regulating valve 27 is an electromagnetic pressure regulating valve. The output end of the water-containing ethanol pump pipe 32 is provided with a pressure sensor 37. The pressure sensor 37 and the pressure regulating valve 27 are matched with the ECU electronic controller 45. The pressure sensor 37 transmits a pressure signal to the ECU electronic controller 45. The ECU electronic controller 45 adjusts and controls the pressure regulating valve 27 according to a set program.

[0042] The buffer tank 23 is provided with a buffer tank pressure sensor 24 and a buffer tank temperature sensor 25. The water-containing ethanol tank 29 is provided with a water-containing ethanol liquid level sensor 30. The ethanol tank 39 is provided with an ethanol liquid level sensor 38. The buffer tank pressure sensor 24, the buffer tank temperature sensor 25, the water-containing ethanol liquid level sensor 30 and the ethanol liquid level sensor 38 are matched with the ECU electronic controller 45.

[0043] The working process of the water-containing ethanol reforming online hydrogen production power system is as follows: the ECU electronic controller 45 controls the alcohol-hydrogen engine 20 to ignite and work. The anhydrous ethanol in the ethanol tank 39 is pumped as fuel by the ethanol pump 43. The flow rate is adjusted by the electromagnetic valve 42. The ethanol filter 44 is filtered. The exhaust gas generated by the alcohol-hydrogen engine 20 enters the smoke pipe 2 from the smoke inlet pipe 3. The baffle 11 blocks the flow and prolongs the walking distance. Finally, the exhaust gas is discharged from the smoke outlet pipe 5. The exhaust gas exchanges heat with the reformer 46. When the temperature of the reformer 46 reaches a set value, the water-containing ethanol in the water-containing ethanol tank 29 is pumped into the reformer 46. The water-containing ethanol filter 35 filters the water-containing ethanol. The electromagnetic valve 33 and the flow controller 36 control the flow of the water-containing ethanol. The pressure regulating valve 27 adjusts the pressure. The water-containing ethanol with appropriate pressure and flow is pumped into the reformer 46. The water-containing ethanol enters the distribution bin 17 from the alcohol liquid inlet pipe 4. It is discharged to the distribution bin 15 and the small heat exchange pipe 14 through the capillary tube 16. It enters the catalyst bin 13 through the small heat exchange pipe 14. The catalyst bin 13 is pre-filled with granular catalyst. After being in contact with the catalyst, it enters the large heat exchange pipe 10. It is guided to the end cover 6 through the large heat exchange pipe 10 and is discharged from the outlet of the end cover 6. The exhaust gas exchanges heat with the small heat exchange pipe 14 and the large heat exchange pipe 10 during the walking process. The small heat exchange pipe 14 and the large heat exchange pipe 10 are heated. The water-containing ethanol is heated and catalytically cracked. The gas generated by the cracking is transported to the buffer tank 23. When the pressure and temperature in the buffer tank 23 reach appropriate values, the electromagnetic reversing valve 48 cuts off the supply of anhydrous ethanol. The gas in the buffer tank 23 is transported as fuel for the alcohol-hydrogen engine 20.

[0044] The above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by ordinary skilled in the art within the essential scope of the utility model shall belong to the protection scope of the utility model.

Claims

1. An aqueous ethanol reforming online hydrogen production power system, comprising an alcohol hydrogen engine (20), an aqueous ethanol tank (29), an ethanol tank (39), an ECU electronic controller (45) and a reformer (46), the tail gas pipe (47) of the alcohol hydrogen engine (20) is connected with the flue gas inlet pipe (3) of the reformer (46), characterized in that: The alcohol liquid inlet pipe (4) of the reformer (46) is connected with the aqueous ethanol tank (29) through the aqueous ethanol pump pipe (32), and the aqueous ethanol pump pipe (32) is provided with an electromagnetic valve I (33), an aqueous ethanol pump (34), an aqueous ethanol filter (35) and a flow controller (36). The exhaust end of the reformer (46) is connected with the buffer tank (23) through the mixed gas pipe (21), the buffer tank (23) is communicated with the feed pipe (22) of the alcohol hydrogen engine (20) through the discharge pipe (26), the feed pipe (22) is further connected with the ethanol tank (39) through the electromagnetic reversing valve (48) and the ethanol pump pipe (41), and the ethanol pump pipe (41) is provided with an electromagnetic valve II (42), an ethanol pump (43) and an ethanol filter (44). The electromagnetic valve I (33), the aqueous ethanol pump (34), the flow controller (36), the electromagnetic valve II (42) and the ethanol pump (43) are matched and connected with the ECU electronic controller (45).

2. The aqueous ethanol reforming on-board hydrogen generation power system of claim 1, wherein: The reformer (46) comprises a transversely arranged smoke pipe (2), the two ends of the smoke pipe (2) are correspondingly connected with a smoke gas inlet pipe (3) and a smoke gas outlet pipe (5), characterized in that the front end surface of the smoke pipe (2) is communicated with an alcohol liquid inlet pipe (4), the rear end surface of the smoke pipe (2) is blocked by a pipe plate (8), the outer pipe wall of the rear end of the smoke pipe (2) is provided with a smoke pipe flange (1), the smoke pipe flange (1) is connected with an end cover (6) pressing the pipe plate (8) through an end cover flange (9), the end cover (6) is communicated with a mixed gas pipe (21), a plurality of baffle plates (11) for prolonging the walking distance of smoke gas are fixedly connected in the smoke pipe (2) in a vertical and spaced manner, a distribution bin (17) communicated with the alcohol liquid inlet pipe (4) is arranged in the smoke pipe (2) at the front end of the smoke gas inlet pipe (3), a catalyst bin (13) is arranged in the smoke pipe (2) at the rear end of the smoke gas inlet pipe (3), the distribution bin (17) is communicated with the distribution bin (15) through a plurality of capillary tubes (16), the distribution bin (15) is communicated with the catalyst bin (13) through a plurality of small heat exchange pipes (14), the catalyst bin (13) is communicated with the end cover (6) through a plurality of large heat exchange pipes (10), the communication end of the large heat exchange pipe (10) with the end cover (6) is provided with an outlet screen (7), and the communication end of the large heat exchange pipe (10) with the catalyst bin (13) is provided with an inlet screen (12).

3. The aqueous ethanol reforming on-board hydrogen generation power system of claim 2, wherein: The smoke gas inlet pipe (3) and the smoke gas outlet pipe (5) are respectively provided with a tail gas temperature sensor (19), the tail gas temperature sensor (19) is matched and connected with the ECU electronic controller (45), and the ECU electronic controller (45) controls the working of the electromagnetic reversing valve (48) according to the temperature signal transmitted by the tail gas temperature sensor (19).

4. The aqueous ethanol reforming on-board hydrogen generation power system of claim 2, wherein: The baffle plate (11) at the rear end of the catalyst bin (13) and the pipe plate (8) are both correspondingly provided with large heat exchange pipe through holes (18) for passing through the large heat exchange pipes (10).

5. The aqueous ethanol reforming on-line hydrogen production power system according to claim 2 or 4, characterized in that: The baffle plate (11) at the front end of the catalyst bin (13) is correspondingly provided with small heat exchange pipe through holes for passing through the small heat exchange pipes (14).

6. The aqueous ethanol reforming on-board hydrogen generation power system of claim 2, wherein: The plurality of capillary tubes (16) are arranged in a regular triangle along the central axis of the smoke pipe (2) and are symmetrically distributed around the central axis; the number of small heat exchange pipes (14) is equal to the number of capillary tubes (16), and the capillary tubes (16) are arranged in one-to-one correspondence with the small heat exchange pipes (14), and the ends of the capillary tubes (16) away from the distribution bin (17) extend into the small heat exchange pipes (14).

7. The aqueous ethanol reforming on-board hydrogen generation power system of claim 2, wherein: The plurality of large heat exchange pipes are arranged in a regular triangle.

8. The aqueous ethanol reforming on-board hydrogen generation power system of claim 1, wherein: The water-containing ethanol pumping pipe (32) is further provided with a manual stop valve (31); and the ethanol pumping pipe (41) is further provided with a manual stop valve (40).

9. The aqueous ethanol reforming on-board hydrogen generation power system of claim 1, wherein: The water-containing ethanol pumping pipe (32) is further provided with a return pipe (28) in communication with the water-containing ethanol tank (29); the return pipe (28) is provided with a pressure regulating valve (27); the pressure regulating valve (27) is an electromagnetic pressure regulating valve; the output end of the water-containing ethanol pumping pipe (32) is provided with a pressure sensor (37); the pressure sensor (37) and the pressure regulating valve (27) are connected to an ECU electronic controller (45); the pressure sensor (37) transmits a pressure signal to the ECU electronic controller (45); and the ECU electronic controller (45) adjusts and controls the pressure regulating valve (27) according to a set program.

10. The aqueous ethanol reforming on-board hydrogen generation power system of claim 1, wherein: The buffer tank (23) is provided with a buffer tank pressure sensor (24) and a buffer tank temperature sensor (25); the water-containing ethanol tank (29) is provided with a water-containing ethanol liquid level sensor (30); the ethanol tank (39) is provided with an ethanol liquid level sensor (38); and the buffer tank pressure sensor (24), the buffer tank temperature sensor (25), the water-containing ethanol liquid level sensor (30) and the ethanol liquid level sensor (38) are connected to the ECU electronic controller (45).

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