Device for rapidly producing hydrogen by using flue gas waste heat

Abstract

The utility model belongs to the technical field of hydrogen production, and particularly relates to a device for rapidly producing hydrogen by utilizing flue gas waste heat, which comprises a shunting automatic switching valve and a hydrogen production device body, the output end of the shunting automatic switching valve is connected with the input end of the hydrogen production device body, and one end of the shunting automatic switching valve is provided with a switching valve inlet end. And a switching valve outlet end and a hot flue gas discharge end are respectively arranged at one end, far away from the switching valve inlet end, of the shunting automatic switching valve. According to the utility model, under the action of a catalyst and the guarantee of temperature, pressure, feed quantity and other elements, hydrogen production and use can be carried out on a vehicle by utilizing flue gas waste heat of a hydrogen production raw material, so that oil is saved, the high-efficiency combustion of a combustion chamber is facilitated, the power of an engine is increased, and clean emission is realized; high-temperature flue gas discharged by a diesel heavy truck engine is utilized to realize heat energy split-flow utilization, and hydrogen is prepared from methanol or methanol and purified water, so that fuel oil is saved by hydrogen-doped combustion of the diesel engine, and carbon emission and nitrogen oxide emission are reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology, and in particular to a device for rapid hydrogen production using waste heat from flue gas. Background Technology

[0002] my country's science and technology are advancing by leaps and bounds, and its social economy is developing at a high quality. People are paying more attention to energy conservation and environmental protection, and their demands are getting higher and higher. In the automotive sector, how can we make cars more fuel-efficient, more gas-efficient, have better emissions, and lower costs? To solve this problem, we can utilize the physical and chemical properties of hydrogen energy, using the waste heat from vehicle emissions to produce hydrogen, and then using hydrogen to mix with gasoline and gas fuels for combustion. This increases engine power, saves on fuel costs, and also makes exhaust emissions more environmentally friendly.

[0003] Currently, my country is actively coordinating air pollution prevention and control with the "dual carbon" target requirements. Among these, diesel heavy-duty trucks are a top priority in pollution prevention and control in the transportation sector. Achieving energy conservation and carbon reduction in diesel vehicles has also become an important part of promoting the green transformation of transportation. Utility Model Content

[0004] The purpose of this invention is to solve the problem of how to achieve energy saving and carbon reduction in diesel vehicles as mentioned in the background art, and to propose a device for rapid hydrogen production using waste heat from flue gas.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rapid hydrogen production device utilizing waste heat from flue gas includes an automatic diversion valve and a hydrogen production device body. The output end of the automatic diversion valve is connected to the input end of the hydrogen production device body. One end of the automatic diversion valve is provided with a switching valve inlet end, and the other end of the automatic diversion valve away from the switching valve inlet end is provided with a switching valve outlet end and a hot flue gas discharge end. An automatic switching valve core is rotatably connected inside the automatic diversion valve.

[0007] The hydrogen production device body has a hot flue gas inlet and a flue gas channel outlet at both ends. A front-end plate valve stem hole is located at the end of the hydrogen production device body near the hot flue gas inlet, and a rear-end plate valve stem hole is located at the end of the hydrogen production device body near the flue gas channel outlet. A sealed spiral coil catalytic reactor body and a rapid evaporator body for hydrogen production feedstock are located in the middle of the hydrogen production device body. A first hot flue gas channel communicating with the sealed spiral coil catalytic reactor body is located within the hydrogen production device body, and a second hot flue gas channel communicating with the rapid evaporator body for hydrogen production feedstock is located within the hydrogen production device body. A pyrolysis coil is arranged around the exterior of the sealed spiral coil catalytic reactor body, and a first shell is located outside the pyrolysis coil. A coil-type pyrolysis unit is arranged outside the rapid evaporator body for hydrogen production feedstock, and a second shell is located outside the coil-type pyrolysis unit.

[0008] The hydrogen production device body is provided with a first flue gas discharge channel and a second flue gas discharge channel at one end near the flue gas channel outlet, which are respectively connected to the main body of the sealed spiral coil catalytic reactor and the main body of the hydrogen production feedstock fast evaporator. The hydrogen production device body is provided with a flue gas confluence inlet at one end near the flue gas channel outlet.

[0009] Preferably, the hydrogen production device body has a temperature sensor mounting internal thread hole at one end near the hot flue gas inlet.

[0010] Preferably, both ends of the first housing and the second housing are fixedly fitted with connecting flanges.

[0011] Preferably, the main body of the hydrogen production feedstock rapid evaporator includes a pressure spray nozzle and a mist separator, a flue gas heating pipe, a hydrogen production feedstock steam outlet, and end caps at both ends of the shell. The mist separator is provided with multiple hydrogen production feedstock steam passage holes, and one end of the flue gas heating pipe is provided with a flue gas passage inside the flue gas heating pipe.

[0012] Preferably, the sealed spiral coil catalytic reactor body includes a raw material inlet, end caps at both ends of the catalytic reactor body, an outer shell of the catalytic reactor body, and a central flue pipe. The central flue pipe is provided with a central flue gas channel, and a catalyst holding pipe is arranged around the outside of the central flue pipe. The bottom of the outer shell of the catalytic reactor body is provided with an internal threaded seat for a temperature sensor and a delivery pipe outlet.

[0013] Preferably, the two ends of the end caps of the main body of the catalytic reactor are respectively located at both ends of the outer shell of the catalytic reactor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this utility model, the waste heat of flue gas is used to produce hydrogen from the raw materials for hydrogen production under the action of a catalyst. Under the guarantee of factors such as temperature, pressure and feed rate, hydrogen can be produced and used on the vehicle, which not only saves fuel but also promotes efficient combustion in the combustion chamber, increases engine power, and achieves clean emissions.

[0016] 2. This utility model utilizes the high-temperature flue gas emitted by diesel heavy-duty truck engines to achieve heat energy diversion and utilization, and uses methanol or methanol and pure water to produce hydrogen, allowing the diesel engine to burn with hydrogen, saving fuel and reducing carbon emissions and nitrogen oxide emissions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the automatic diversion valve in a rapid hydrogen production device utilizing waste heat from flue gas, as proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the hydrogen production device body in the rapid hydrogen production device utilizing waste heat of flue gas proposed in this utility model.

[0019] Figure 3 This is a side view of the main body of the rapid evaporator for hydrogen production feedstock proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the main body of the rapid evaporator for hydrogen production feedstock proposed in this utility model.

[0021] Figure 5 This is a schematic diagram of the internal structure of the sealed spiral coil catalytic reactor body proposed in this utility model;

[0022] Figure 6 A schematic diagram of the process for producing hydrogen from waste heat of flue gas.

[0023] Figure 7 This is the overall control diagram for a hydrogen production system utilizing waste heat from flue gas.

[0024] In the diagram: 1. Switching valve inlet; 2. Automatic switching valve core; 3. Switching valve outlet; 4. Hot flue gas discharge end; 5. Hot flue gas inlet; 6. Front plate valve stem hole; 7. First hot flue gas passage; 8. First shell; 9. Retort coil; 10. Sealed spiral coil catalytic reactor body; 11. First flue gas discharge passage; 12. Flue gas confluence inlet; 13. Flue gas passage outlet; 14. Rear plate valve stem hole; 15. Second flue gas discharge passage; 16. Coil-type retort; 17. Second shell; 18. Hydrogen feedstock rapid evaporator body; 19. Connecting flange; 20. Second hot flue gas passage; 21. Temperature sensor mounting internal thread hole; 22. Pressure... 23. Power spray nozzle; 24. Flue gas heating pipe; 25. Mist separator; 26. Hydrogen production feedstock steam outlet; 27. Evaporator circular outer shell; 28. Hydrogen production feedstock steam passage hole; 29. ​​End caps at both ends of the shell; 30. Flue gas passage inside the flue gas heating pipe; 31. In the hydrogen production feedstock rapid evaporator, the mist droplets are transformed into high-temperature hydrogen production feedstock dry steam; 32. Sealed coil-type catalytic reactor filled with helium-heated homogenizing zone; 33. Feedstock inlet; 34. End caps at both ends of the catalytic reactor body; 35. Central flue gas passage of the main body; 36. Central flue pipe of the main body; 37. Catalyst container pipe; 38. Outer shell of the catalytic reactor; 39. Internally threaded seat sleeve; 30. Delivery pipe outlet. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-7 A rapid hydrogen production device utilizing waste heat from flue gas includes a diversion automatic switching valve and a hydrogen production device body. The output end of the diversion automatic switching valve is connected to the input end of the hydrogen production device body. One end of the diversion automatic switching valve is provided with a switching valve inlet 1, and the other end of the diversion automatic switching valve away from the switching valve inlet 1 is provided with a switching valve outlet 3 and a hot flue gas discharge end 4. An automatic switching valve core 2 is rotatably connected inside the diversion automatic switching valve.

[0027] In this embodiment, the hydrogen production device body is provided with a hot flue gas inlet 5 and a flue gas channel outlet 13 at both ends. The end of the hydrogen production device body near the hot flue gas inlet 5 is provided with a temperature sensor mounting internal thread hole 21. The end of the hydrogen production device body near the hot flue gas inlet 5 is provided with a front plate valve stem hole 6. The end of the hydrogen production device body near the flue gas channel outlet 13 is provided with a rear plate valve stem hole 14. The middle part of the hydrogen production device body is provided with a sealed spiral coil catalytic reactor body 10 and a hydrogen production feedstock rapid evaporator body 18.

[0028] In this embodiment, the main body 18 of the hydrogen production feedstock fast evaporator includes a pressure spray nozzle 22 and a mist separator 24, a flue gas heating pipe 23, a hydrogen production feedstock steam outlet 25 and end caps 28 at both ends of the shell. The mist separator 24 is provided with multiple hydrogen production feedstock steam passage holes 27, and one end of the flue gas heating pipe 23 is provided with a flue gas passage 29 inside the flue gas heating pipe.

[0029] In this embodiment, the sealed spiral coil catalytic reactor body 10 includes a raw material inlet 32, end caps 33 at both ends of the catalytic reactor body, an outer shell 37 of the catalytic reactor body, and a central flue pipe 35. The two ends of the end caps 33 at both ends of the catalytic reactor body are respectively located at both ends of the outer shell 37 of the catalytic reactor body. The central flue pipe 35 is provided with a central flue gas channel 34. The catalyst holding pipe 36 is arranged around the outside of the central flue pipe 35. The bottom of the outer shell 37 of the catalytic reactor body is provided with an internal threaded seat 38 for a temperature sensor and a conveying pipe outlet 39.

[0030] In this embodiment, the hydrogen production device body is provided with a first hot flue gas channel 7 that communicates with the sealed spiral coil catalytic reactor body 10, and a second hot flue gas channel 20 that communicates with the hydrogen production feedstock fast evaporator body 18. The sealed spiral coil catalytic reactor body 10 is surrounded by a dry distillation coil 9, and the dry distillation coil 9 is provided with a first shell 8. The hydrogen production feedstock fast evaporator body 18 is provided with a coil dry distillation unit 16, and the coil dry distillation unit 16 is provided with a second shell 17. Both ends of the first shell 8 and the second shell 17 are fixedly sleeved with connecting flanges 19.

[0031] In this embodiment, the hydrogen production device body is provided with a first flue gas discharge channel 11 and a second flue gas discharge channel 15 at one end near the flue gas channel outlet 13, which are respectively connected to the sealed spiral coil catalytic reactor body 10 and the hydrogen production feedstock fast evaporator body 18. The hydrogen production device body is provided with a flue gas confluence inlet 12 at one end near the flue gas channel outlet 13.

[0032] In this embodiment, an automatic switching valve for diverting flue gas heat is designed to safely utilize the waste heat of flue gas and ensure the safe and smooth production of hydrogen by the hydrogen production system. It consists of a flue gas waste heat safe utilization control mechanism composed of a hot flue gas inlet 1, a hot flue gas outlet 3, a diverted hot flue gas outlet 4, and an automatic switching valve core 2 for regulating the flow direction of the hot flue gas. The hot flue gas outlet 3 supplies heat to the hydrogen production system, while the hot flue gas outlet 4 discharges the diverted hot flue gas through a bypass flue. The hot flue gas inlet 5 provides the heat energy to the main body of the hydrogen production system. The temperature of the flue gas entering the hydrogen production system is accurately determined by a temperature sensor installed on the threaded hole 21 of the main body of the hydrogen production system, which provides the hydrogen production process temperature of 400 to 550 degrees Celsius required by the hydrogen production system. Combined with the actual hydrogen production temperature displayed by the temperature sensor installed on the catalytic reactor 10, the normal operation of the entire hydrogen production system can be precisely controlled.

[0033] In this embodiment, the raw material for this flue gas waste heat hydrogen production system is liquid methanol or methanol and pure water, mixed in a 1:1 ratio (by mass). This mixed hydrogen production raw material is placed in a hydrogen production raw material tank. During operation, a methanol pump or corrosion-resistant pump delivers the liquid hydrogen production raw material to the pressure spray nozzle 22 via pipeline. The liquid hydrogen production raw material is sprayed through the pressure spray nozzle 22 into the high-temperature zone of the rapid evaporator, where it is transformed from droplets into hydrogen production raw material vapor (this method of transforming droplets into vapor can save more than 60% of energy input). The generated hydrogen production raw material vapor passes through the hydrogen production raw material vapor passage 27 and then enters the first-stage coil-type dry distillation unit 16, which is wrapped around the outside of the rapid evaporator, via a delivery pipe on the hydrogen production raw material vapor outlet 25. After primary pyrolysis, the hydrogen-producing feedstock vapor is transported through pipelines to the secondary coiled pyrolysis unit 9, which is wrapped around the outside of the catalytic reactor, for further pyrolysis. After these two stages of pyrolysis, the hydrogen-producing feedstock vapor enters the inlet 32 ​​of the coiled catalytic reaction bed through pipelines, thus being added to the catalyst container 36 of the sealed coiled catalytic reactor. At this point, the hydrogen-producing feedstock vapor enters the catalytic reaction bed and, under the hydrogen production process temperature of 400-550 degrees Celsius, generates approximately 75% hydrogen and approximately 25% carbon dioxide (this gas needs to be purified). This hydrogen is then used for vehicle blending to save fuel and reduce emissions. There are two methods for blending hydrogen: one is to add hydrogen during engine intake, and the other is to directly inject high-pressure hydrogen into the engine combustion chamber. The hydrogen purification device (installed on the same vehicle) can achieve a hydrogen purity of 80% to 90% or higher using both physical and chemical purification devices, making it suitable for use as a blended fuel. The hydrogen purification device used here is a vehicle-mounted type, and another patent has been filed and is currently under review.

[0034] In this embodiment, the internal sealed space of the 360-degree heated catalytic reactor of the sealed spiral coil type (circular coil and rectangular coil) catalytic reaction bed needs to be rapidly heated to avoid the formation of high temperature and low temperature zones. Therefore, we fill the space 31 inside the spiral coil type catalytic reactor with inert gas such as helium or argon, which has excellent thermal conductivity, to achieve the best effect of rapid and safe hydrogen production and use. The spiral coil in the sealed spiral coil type (circular coil and rectangular coil) catalytic reactor can be wound in multiple layers to increase the amount of catalyst contained and increase the amount of hydrogen produced and used.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid hydrogen production device utilizing waste heat from flue gas, comprising an automatic diversion valve and a hydrogen production device body, characterized in that: The output end of the automatic diversion valve is connected to the input end of the hydrogen production unit body. One end of the automatic diversion valve is provided with a switching valve inlet end (1). The end of the automatic diversion valve away from the switching valve inlet end (1) is provided with a switching valve outlet end (3) and a hot flue gas discharge end (4). The automatic diversion valve is rotatably connected to the automatic diversion valve core (2). The hydrogen production device body has a hot flue gas inlet (5) and a flue gas channel outlet (13) at both ends. A front-end plate valve stem hole (6) is located at the end of the hydrogen production device body near the hot flue gas inlet (5), and a rear-end plate valve stem hole (14) is located at the end of the hydrogen production device body near the flue gas channel outlet (13). A sealed spiral coil catalytic reactor body (10) and a rapid evaporator body (18) for hydrogen production feedstock are located in the middle of the hydrogen production device body. The hydrogen production device body contains a sealed spiral coil catalytic reactor... The main body (10) is connected to the first hot flue gas channel (7). The hydrogen production device body is provided with a second hot flue gas channel (20) connected to the main body (18) of the hydrogen production feedstock fast evaporator. The sealed spiral coil catalytic reactor body (10) is surrounded by a dry distillation coil (9). The dry distillation coil (9) is provided with a first shell (8) outside. The main body (18) of the hydrogen production feedstock fast evaporator is provided with a coil dry distillation unit (16) outside. The coil dry distillation unit (16) is provided with a second shell (17) outside. The hydrogen production device body is provided with a first flue gas discharge channel (11) and a second flue gas discharge channel (15) at one end near the flue gas channel outlet (13), which are respectively connected to the sealed spiral coil catalytic reactor body (10) and the hydrogen production feedstock fast evaporator body (18). The hydrogen production device body is provided with a flue gas confluence inlet (12) at one end near the flue gas channel outlet (13).

2. The rapid hydrogen production device utilizing waste heat from flue gas according to claim 1, characterized in that: The hydrogen production device body is provided with a temperature sensor mounting internal thread hole (21) at one end near the hot flue gas inlet (5).

3. The rapid hydrogen production device utilizing flue gas waste heat according to claim 1, characterized in that: Both ends of the first housing (8) and the second housing (17) are fixedly fitted with connecting flanges (19).

4. The rapid hydrogen production device utilizing waste heat from flue gas according to claim 1, characterized in that: The main body (18) of the hydrogen production feedstock rapid evaporator includes a pressure spray nozzle (22), a mist separator (24), a flue gas heating pipe (23), a hydrogen production feedstock steam outlet (25), a circular outer shell (26) of the evaporator, and end caps (28) at both ends of the shell. The mist separator (24) is provided with multiple hydrogen production feedstock steam passage holes (27), and one end of the flue gas heating pipe (23) is provided with a flue gas passage (29) inside the flue gas heating pipe.

5. The rapid hydrogen production device utilizing waste heat from flue gas according to claim 1, characterized in that: The sealed spiral coil catalytic reactor body (10) includes a raw material inlet (32), end caps (33) at both ends of the catalytic reactor body, an outer shell (37) of the catalytic reactor, and a central flue pipe (35). The central flue pipe (35) is provided with a central flue gas channel (34). The catalyst holding pipe (36) is arranged around the outside of the central flue pipe (35). The bottom of the outer shell (37) of the catalytic reactor is provided with an internal threaded seat (38) for a temperature sensor and a delivery pipe outlet (39).

6. The rapid hydrogen production device utilizing waste heat from flue gas according to claim 5, characterized in that: The two ends of the end caps (33) of the main body of the catalytic reactor are respectively located at the two ends of the outer shell (37) of the catalytic reactor.

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