Gas mixing device for hydrogen production from natural gas

Abstract

The application relates to the technical field of hydrogen production from natural gas, and discloses a gas mixing device for hydrogen production from natural gas, which comprises a bottom plate, a mixing cylinder and a reactor body fixedly installed on the top of the bottom plate, a gas outlet pipe fixedly installed on the top of the reactor body, a premixing assembly arranged on the outer side of the mixing cylinder, and a waste heat recovery assembly arranged on the outer side of the bending part of the gas outlet pipe. The premixing assembly comprises a preheating cylinder fixedly sleeved and installed on the outer side. The waste heat of hydrogen gas mixture is used to heat water, the hot water flow drives the outer gear ring to rotate, the blocking plate is deflected while rotating, the natural gas and water vapor are stirred and mixed, the blocking ring pushes the natural gas and water vapor back, the natural gas and water vapor can be uniformly mixed while being premixed, the hydrogen production reaction is sufficient and stable, and the catalyst in the reactor body is fully utilized, so that waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of natural gas hydrogen production technology, specifically to a gas mixing device for natural gas hydrogen production. Background Technology

[0002] The principle of hydrogen production from natural gas reforming is that natural gas and steam are converted into hydrogen and carbon monoxide in a reformer under certain temperature and pressure through the action of a catalyst. Nickel-based reforming catalysts are commonly used.

[0003] For example, the natural gas-to-hydrogen converter disclosed in CN116464977A has a combustion chamber and several vertically arranged conversion tube placement cavities inside its outer shell. The conversion tubes are inserted into these placement cavities. Below each placement cavity is a linkage valve cavity, comprising an upper chamber and a lower chamber. The upper chamber is connected to the combustion chamber via an exhaust port, and the lower chamber is connected to the heating chamber via an exhaust channel. The lower chamber contains a baffle plate connected to a stud via a first valve stem. The stud is threaded into the conversion tube placement cavity. A slot is recessed on the top surface of the stud, and an insert plate protrudes from the bottom of the conversion tube, inserting into the slot. The conversion tube controls the valve core within the linkage valve cavity to control the connection between the combustion chamber and the heating chamber. This ensures that replacing the catalyst in one conversion tube does not affect the operation of the entire converter.

[0004] In natural gas reforming for hydrogen production (especially steam methane reforming, SMR), maintaining sufficient mixing of natural gas and steam is crucial for ensuring high reaction efficiency, inhibiting carbon buildup, and extending catalyst life. However, the existing method of simply mixing desulfurized natural gas and steam before introducing them into the reformer makes it difficult to maintain sufficient and uniform mixing. This results in excessively high methane concentrations or insufficient steam in some areas, leading to unreacted methane being discharged with the products, reducing hydrogen yield. Furthermore, the activity of some catalyst areas is not fully utilized, reducing overall reaction efficiency. Uneven mixing also leads to uneven distribution of exothermic / endothermic reactions, affecting the stable and efficient conduct of the reaction. Summary of the Invention

[0005] The purpose of this invention is to provide a gas mixing device for hydrogen production from natural gas, in order to solve the problems that insufficient and uneven mixing of natural gas and water vapor will reduce hydrogen yield, and will also result in the underutilization of the activity of some catalyst regions, thus reducing the overall reaction efficiency. Uneven mixing will also lead to uneven distribution of exothermic / endothermic reaction, affecting the stable and efficient progress of the reaction.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gas mixing device for hydrogen production from natural gas, comprising a base plate and a mixing cylinder and a reactor body fixedly installed on the top of the base plate; Also includes: An outlet pipe is fixedly installed on the top of the reactor body, a premixing component is provided on the outside of the mixing cylinder, the outlet pipe is bent downwards, and a waste heat recovery component is provided on the outside of the bend of the outlet pipe. A steam pipe is fixedly installed on the upper part of one side of the mixing cylinder, and a natural gas pipe is fixedly installed on the lower part of one side of the mixing cylinder. The waste heat recovery assembly includes a recovery cylinder fixedly installed on the outside of the gas outlet pipe. The premixing assembly includes a preheating cylinder that is sleeved and fixedly installed on the outside of the mixing cylinder. A connecting pipe is fixedly connected between the preheating cylinder and the recovery cylinder. A pump body is fixedly installed on the outside of the connecting pipe. A spiral tube is fixedly connected inside the preheating cylinder.

[0007] Preferably, a connecting pipe connects the mixing cylinder and the reactor body. One end of the spiral tube is connected to the connecting pipe. Two rotating shafts are laterally rotatably connected inside the preheating cylinder. The rotating shafts are rotatably connected to the spiral tube. An external gear ring is rotatably installed inside the mixing cylinder. The other end of the spiral tube is open and connected to the inside of the preheating cylinder. An impeller is fixedly connected to the outside of the rotating shaft. A semi-circular plate is fixedly connected to the inside of the spiral tube. One end of the rotating shaft passes through the preheating cylinder and is fixedly connected to a connecting gear. Both the upper and lower connecting gears are meshed with the external gear ring.

[0008] By adopting the above technical solution, the waste heat of the hydrogen-gas mixture generated by the reactor pump is recovered and used to heat the water. When the hot water is pumped into the preheating cylinder, it preheats the incoming natural gas and steam. At the same time, the flow of hot water drives the outer gear ring to rotate. The outer gear ring drives the inner rotating shaft and baffle plate to rotate. The baffle plate deflects while rotating, thereby agitating and mixing the natural gas and steam and extending the mixing time. The rotation of the baffle ring pushes the natural gas and steam back again, which facilitates uniform mixing while premixing. This ensures that the catalyst inside the reactor body is fully utilized and waste is reduced.

[0009] Preferably, a fixing rod is fixedly connected to the middle of the inner side of the external gear ring, and multiple sets of connecting plates are symmetrically and rotatably installed on the outer side of the external gear ring. Each set of connecting plates includes two pieces, and the two connecting plates are rotatably connected to the blocking plate through an inner shaft. A torsion spring is sleeved on the outer side of the inner shaft, and the two ends of the torsion spring are fixedly connected to the connecting plate and the blocking plate, respectively.

[0010] By adopting the above technical solution, the outer gear ring drives the fixed rod and screw to rotate. The outer gear ring also drives the connecting piece and the baffle plate to rotate. The baffle plate is guided by the wave groove inside the inner ring body, which drives the inner shaft to rotate. The inner shaft acts on the connecting piece, causing the baffle plate to rotate and deflect at the same time.

[0011] Preferably, an inner ring body is fixedly connected to the inner wall of the mixing cylinder, the inner ring of the inner ring body has a wave groove, a screw is fixedly connected to one side of the fixing rod, a blocking ring is threaded to the outer side of the screw, and a limit strip is fixedly connected to the inner wall of the mixing cylinder, the blocking ring and the limit strip are slidably connected.

[0012] By adopting the above technical solution, the rotation of the screw will also drive the blocking ring to move linearly, and the rotation of the blocking ring will push the natural gas and water vapor back again, which will facilitate uniform mixing while premixing.

[0013] Preferably, an internal gear ring is rotatably mounted on one side of the top of the base plate, a side plate is fixedly connected to the top of the base plate, an upper lead screw is rotatably connected to the upper inside of the side plate, a large gear is fixedly connected to one end of the upper lead screw, a lower lead screw is rotatably connected to the lower inside of the side plate, a small gear is fixedly connected to one end of the lower lead screw, and both the large gear and the small gear are meshed with the internal gear ring.

[0014] By adopting the above technical solution, the internal gear ring will drive the large gear and the small gear to rotate. The large gear will drive the upper lead screw to rotate, and the small gear will drive the lower lead screw to rotate.

[0015] Preferably, the circumference of the large gear is five times that of the small gear, and the outer sides of both the upper and lower lead screws are threaded with adjusting plates. The ends of the steam pipe and the natural gas pipe are fixedly connected with adjusting pipes. The adjusting plates are slidably connected to the adjusting pipes, and a fixing plate is fixedly connected inside the adjusting pipes. The fixing plate has a square groove inside.

[0016] By adopting the above technical solution, when adjusting the intake flow rate, the volume ratio of natural gas to water vapor is kept at approximately one to five, thus ensuring the fullness and stability of the hydrogen production reaction.

[0017] Preferably, a water inlet pipe is fixedly connected to one side of the top of the recycling cylinder, and a drain pipe and a drive motor are fixedly installed on the outside of the recycling cylinder. The output end of the drive motor passes through the recycling cylinder and is fixedly connected to an inner rod. A stirring plate is symmetrically fixedly connected to the outside of the inner rod.

[0018] By adopting the above technical solution, the heat of the hydrogen mixture after reaction in the gas outlet pipe heats the water inside the recovery cylinder, driving the motor to rotate the inner rod and the stirring plate.

[0019] Preferably, a sleeve is rotatably connected to the outer side of the air outlet pipe, vertical strips are symmetrically fixedly connected to the outer side of the sleeve, the stirring plate is spaced apart from the vertical strips, an arc groove is also provided on the outer side of the sleeve, and inner scraper strips are symmetrically fixedly connected to the inner wall of the sleeve.

[0020] By adopting the above technical solution, the stirring plate drives the vertical strip plate and the sleeve to rotate, and the arc groove makes it easy to keep the air outlet pipe in contact with the water. The rotation of the sleeve will drive the inner scraper to rotate at the same time, and the inner scraper will scrape off the scale on the outside of the air outlet pipe.

[0021] Preferably, a support plate is fixedly connected to the bottom of the recycling cylinder, and the bottom of the support plate is fixedly connected to the bottom plate. A water outlet pipe is fixedly installed at the bottom of the mixing cylinder, and the water outlet pipe passes through the preheating cylinder and connects to the outside.

[0022] By adopting the above technical solution, the water outlet pipe is used to discharge the water remaining inside the preheating cylinder.

[0023] Compared with the prior art, the beneficial effects of this invention are as follows: By setting up a premixing component and utilizing the cooperation of components such as the connecting pipe, preheating cylinder, and spiral tube, the waste heat of the hydrogen-gas mixture generated by the reactor pump is recovered. This waste heat is used to heat the water. When the hot water is pumped into the preheating cylinder, it first flows into the spiral tube and then into the preheating cylinder. On the one hand, this preheats the incoming natural gas and water vapor. On the other hand, the flow of hot water also drives the outer gear ring to rotate. The outer gear ring drives the inner rotating shaft and baffle plate to rotate. The baffle plate deflects as it rotates, thereby agitating and mixing the natural gas and water vapor and extending the mixing time. At the same time, it drives the baffle ring to move linearly, pushing the natural gas and water vapor back. This facilitates uniform mixing during premixing, making the subsequent hydrogen production reaction highly efficient. Furthermore, when adjusting the inlet flow rate, the volume ratio of natural gas to water vapor is maintained at approximately 1:5, ensuring the fullness and stability of the hydrogen production reaction. This also ensures that the catalyst inside the reactor body is fully utilized, reducing waste. Specific details are as follows: 1. By setting up a premixing component, the operator starts the pump, which draws hot water from inside the recovery cylinder through the connecting pipe. An insulation sleeve is installed on the outside of the connecting pipe. The hot water enters the spiral tube and is blocked by the semi-circular plate, causing the hot water to impact one side of the impeller, making both the upper and lower shafts rotate clockwise. This drives the outer gear ring to rotate counterclockwise. The outer gear ring drives the fixed rod and screw to rotate, and it also drives the connecting plate and the baffle plate to rotate. The baffle plate is guided by the wave groove inside the inner ring, which drives the inner shaft to rotate. The inner shaft acts on the connecting plate, causing the baffle plate to rotate and deflect simultaneously, thus agitating and mixing the natural gas and steam and extending the mixing time. The screw rotation also drives the baffle ring to move linearly. The rotation of the baffle ring pushes the natural gas and steam back again, facilitating uniform mixing during premixing and ensuring efficient subsequent hydrogen production. The hot water in the spiral tube then flows into the preheating cylinder, preheating the incoming natural gas and steam. After thorough mixing, the valve of the connecting pipe is opened, allowing the mixed natural gas and steam to enter the reactor body for reaction. 2. When adjusting the intake air flow, the operator rotates the internal gear ring, which drives the large gear and small gear to rotate. The large gear drives the upper lead screw to rotate, and the small gear drives the lower lead screw to rotate. Since the circumference ratio of the large gear and the small gear is 5:1, the moving distance of the upper adjusting plate when rotating the internal gear ring is five times that of the lower adjusting plate. Moreover, the adjusting plate is in close contact with the fixed plate, so that when adjusting the intake air flow, the volume ratio of natural gas and water vapor is kept approximately 1:5, which keeps the hydrogen production reaction sufficient and stable. At the same time, it also makes full use of the catalyst inside the reactor body and reduces waste. 3. By setting up a waste heat recovery component, the operator adds water through the water inlet pipe. The heat from the hydrogen mixture after the reaction in the outlet pipe heats the water inside the recovery cylinder. At the same time, the drive motor rotates the inner rod and the stirring plate. The stirring plate rotates the vertical bar plate and the sleeve. The arc-shaped groove helps to keep the outlet pipe in contact with the water. The rotation of the sleeve also drives the inner scraper to rotate. The inner scraper removes the scale on the outside of the outlet pipe, reducing the reduction in waste heat recovery efficiency caused by scale adhesion. This facilitates both the condensation of the hydrogen mixture and the recovery and utilization of waste heat. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first three-dimensional overall structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional overall structure of the present invention; Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the water outlet pipe structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the spiral tube structure of the present invention; Figure 7 This is a schematic cross-sectional view of the mixing cylinder structure of the present invention; Figure 8 This is an exploded view of the inner ring body connection structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C; Figure 10 This is a schematic diagram of the large gear structure of the present invention; Figure 11 This is a schematic diagram of the pinion structure of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural diagram at point D; Figure 13 This is a schematic cross-sectional view of the recovery cylinder of the present invention; Figure 14 For the present invention Figure 13 Enlarged structural diagram at point E in the middle.

[0025] In the diagram: 1. Base plate; 2. Mixing cylinder; 3. Connecting pipe; 4. Reactor body; 5. Gas outlet pipe; 6. Premixing assembly; 61. Preheating cylinder; 62. Connecting pipe; 63. Pump body; 64. Spiral tube; 65. Rotating shaft; 66. Impeller; 67. Semicircular plate; 68. Connecting gear; 69. External gear ring; 610. Fixing rod; 611. Connecting piece; 612. Baffle plate; 613. Torsion spring; 614. Inner ring body; 615. Screw; 616. Baffle ring; 617. Limiting strip; 618. Internal gear ring; 6 19. Side plate; 620. Upper lead screw; 621. Large gear; 622. Lower lead screw; 623. Small gear; 624. Adjusting plate; 625. Adjusting pipe; 626. Fixing plate; 627. Square groove; 7. Waste heat recovery assembly; 71. Recovery cylinder; 72. Water inlet pipe; 73. Drain pipe; 74. Drive motor; 75. Inner rod; 76. Stirring plate; 77. Sleeve; 78. Vertical strip plate; 79. Arc groove; 710. Inner scraper; 8. Steam pipe; 9. Natural gas pipe; 10. Support plate; 11. Water outlet pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 - Figure 4 The present invention provides a technical solution: a gas mixing device for hydrogen production from natural gas, comprising a base plate 1, a mixing cylinder 2 and a reactor body 4 fixedly installed on the top of the base plate 1.

[0028] An outlet pipe 5 is fixedly installed on the top of the reactor body 4, and a premixing component 6 is provided on the outside of the mixing cylinder 2. The outlet pipe 5 is bent downwards to reduce the backflow of condensate.

[0029] A steam pipe 8 is fixedly installed on the upper part of one side of the mixing cylinder 2, and a natural gas pipe 9 is fixedly installed on the lower part of one side of the mixing cylinder 2. A waste heat recovery assembly 7 is provided on the outside of the bend of the gas outlet pipe 5. The waste heat recovery assembly 7 includes a recovery cylinder 71 fixedly installed on the outside of the gas outlet pipe 5.

[0030] A support plate 10 is fixedly connected to the bottom of the recycling cylinder 71. The bottom of the support plate 10 is fixedly connected to the bottom plate 1. A water outlet pipe 11 is fixedly installed at the bottom of the mixing cylinder 2. The water outlet pipe 11 passes through the preheating cylinder 61 and connects to the outside. The support plate 10 is used to support and fix the recycling cylinder 71. The water outlet pipe 11 facilitates the subsequent discharge of water.

[0031] like Figure 1 and Figure 3 - Figure 12 As shown, the premixing component 6 includes a preheating cylinder 61 that is sleeved and fixedly installed on the outside of the mixing cylinder 2. A connecting pipe 62 is fixedly connected between the preheating cylinder 61 and the recovery cylinder 71. A pump body 63 is fixedly installed on the outside of the connecting pipe 62. A spiral pipe 64 is fixedly connected inside the preheating cylinder 61.

[0032] A connecting pipe 3 connects the mixing cylinder 2 and the reactor body 4. A shut-off valve is installed on the outside of both the connecting pipe 3 and the connecting pipe 62. One end of the spiral pipe 64 is connected to the connecting pipe 62. Two rotating shafts 65 are rotatably connected inside the preheating cylinder 61. The rotating shafts 65 are rotatably connected to the spiral pipe 64. An external gear ring 69 is rotatably installed inside the mixing cylinder 2. The other end of the spiral pipe 64 is open and connected to the inside of the preheating cylinder 61. An impeller 66 is fixedly connected to the outside of the rotating shaft 65. A semi-circular plate 67 is fixedly connected to the inside of the spiral pipe 64. The semi-circular plate 67 blocks the water body to impact one side of the impeller 66, so that the impeller 66 rotates stably. One end of the rotating shaft 65 passes through the preheating cylinder 61 and is fixedly connected to a connecting gear 68. Both the upper and lower connecting gears 68 are meshed with the external gear ring 69.

[0033] A fixing rod 610 is fixedly connected to the middle of the inner side of the external gear ring 69. Multiple sets of connecting plates 611 are symmetrically and rotatably installed on the outer side of the external gear ring 69. Each set of connecting plates 611 includes two pieces. The two connecting plates 611 are rotatably connected to the blocking plate 612 through an inner shaft. A torsion spring 613 is sleeved on the outer side of the inner shaft. The two ends of the torsion spring 613 are fixedly connected to the connecting plate 611 and the blocking plate 612 respectively. The torsion spring 613 is used to assist the deflection and reset of the blocking plate 612.

[0034] An inner ring body 614 is fixedly connected to the inner wall of the mixing cylinder 2. The inner ring of the inner ring body 614 has a wave groove. The baffle plate 612 will deflect itself due to the obstruction of the wave groove. A screw 615 is fixedly connected to one side of the fixing rod 610. A blocking ring 616 is threadedly connected to the outer side of the screw 615. A limit strip 617 is also fixedly connected to the inner wall of the mixing cylinder 2. The blocking ring 616 is slidably connected to the limit strip 617. Before the next preheating use, the operator can manually rotate the fixing rod 610 to move the blocking ring 616 back to the rightmost end.

[0035] An internal gear ring 618 is rotatably mounted on one side of the top of the base plate 1. A side plate 619 is fixedly connected to the top of the base plate 1. An upper lead screw 620 is rotatably connected to the upper part of the side plate 619. A large gear 621 is fixedly connected to one end of the upper lead screw 620. A lower lead screw 622 is rotatably connected to the lower part of the side plate 619. A small gear 623 is fixedly connected to one end of the lower lead screw 622. Both the large gear 621 and the small gear 623 are meshed with the internal gear ring 618.

[0036] The circumference of the large gear 621 is five times that of the small gear 623. Adjusting plates 624 are threaded to the outer sides of the upper lead screw 620 and the lower lead screw 622. Adjusting pipes 625 are fixedly connected to the ends of the steam pipe 8 and the natural gas pipe 9. The adjusting plate 624 is slidably connected to the adjusting pipe 625. A fixing plate 626 is fixedly connected inside the adjusting pipe 625. A square groove 627 is opened inside the fixing plate 626. Initially, the connecting area of ​​the upper square groove 627 is five times that of the lower square groove 627, so as to maintain the volume ratio of natural gas and water vapor at approximately one to five, which facilitates the full and stable hydrogen production reaction.

[0037] Example 1: As Figure 3 - Figure 12 As shown, the operator starts the pump body 63, which extracts hot water from the inside of the recovery cylinder 71 through the connecting pipe 62. The outside of the connecting pipe 62 is equipped with an insulation sleeve. The hot water enters the spiral tube 64 and is blocked by the semi-circular plate 67, causing the hot water to impact one side of the impeller 66. This causes both the upper and lower shafts 65 to rotate forward, thereby driving the outer gear ring 69 to rotate in reverse. The outer gear ring 69 drives the fixed rod 610 and the screw 615 to rotate. The outer gear ring 69 also drives the connecting piece 611 and the baffle plate 612 to rotate. The baffle plate 612 is guided by the wave groove inside the inner ring body 614, which drives the inner shaft to rotate. The inner shaft acts on the connecting piece 611, causing the baffle plate 612 to rotate and deflect at the same time, thereby agitating and mixing the natural gas and water vapor and prolonging the mixing time.

[0038] The rotation of screw 615 also drives the blocking ring 616 to move linearly. The rotation of the blocking ring 616 pushes the natural gas and water vapor back again, which facilitates uniform mixing while premixing, so as to make the subsequent hydrogen production reaction efficient. The hot water in the spiral tube 64 then flows into the preheating cylinder 61, which preheats the incoming natural gas and water vapor. After thorough mixing, the valve of the connecting pipe 3 is opened, so that the mixed natural gas and water vapor enter the reactor body 4 for reaction.

[0039] When adjusting the intake air flow, the operator rotates the internal gear ring 618, which drives the large gear 621 and the small gear 623 to rotate. The large gear 621 drives the upper lead screw 620 to rotate, and the small gear 623 drives the lower lead screw 622 to rotate. Since the circumference ratio of the large gear 621 to the small gear 623 is five to one, the moving distance of the upper adjusting plate 624 when rotating the internal gear ring 618 is five times that of the lower adjusting plate 624. Furthermore, the adjusting plate 624 is in close contact with the fixed plate 626, which ensures that the volume ratio of natural gas to water vapor is maintained at approximately one to five when adjusting the intake air flow, thus maintaining the fullness and stability of the hydrogen production reaction. At the same time, it also ensures that the catalyst inside the reactor body 4 is fully utilized, reducing waste.

[0040] like Figure 1 and Figure 13 - Figure 14 As shown, a water inlet pipe 72 is fixedly connected to one side of the top of the recycling cylinder 71. A drain pipe 73 and a drive motor 74 are also fixedly installed on the outside of the recycling cylinder 71. The output end of the drive motor 74 passes through the recycling cylinder 71 and is fixedly connected to an inner rod 75. A stirring plate 76 is symmetrically fixedly connected to the outside of the inner rod 75.

[0041] A sleeve 77 is rotatably connected to the outside of the air outlet pipe 5. Vertical strip plates 78 are symmetrically fixedly connected to the outside of the sleeve 77. A stirring plate 76 is spaced apart from the vertical strip plates 78, so that when the stirring plate 76 rotates, it will drive the vertical strip plates 78 to rotate, and the vertical strip plates 78 will drive the sleeve 77 to rotate. An arc-shaped groove 79 is also provided on the outside of the sleeve 77. An inner scraper 710 is symmetrically fixedly connected to the inner wall of the sleeve 77.

[0042] Example 2: Figure 13 - Figure 14 As shown, the operator adds water through the water inlet pipe 72. The heat from the hydrogen mixture after the reaction in the outlet pipe 5 heats the water inside the recovery cylinder 71. At the same time, the drive motor 74 drives the inner rod 75 and the stirring plate 76 to rotate. The stirring plate 76 drives the vertical bar plate 78 and the sleeve 77 to rotate. The arc-shaped groove 79 helps to keep the outlet pipe 5 in contact with the water. The rotation of the sleeve 77 also drives the inner scraper 710 to rotate. The inner scraper 710 scrapes away the scale on the outside of the outlet pipe 5, reducing the reduction in waste heat recovery efficiency caused by scale adhesion. This facilitates both the condensation of the hydrogen mixture and the recovery and utilization of waste heat.

[0043] Working principle: When using this device, firstly, as... Figure 1 - Figure 14As shown, the operator starts the pump body 63, which draws hot water from the recovery cylinder 71 through the connecting pipe 62. The hot water enters the spiral tube 64 and, blocked by the semi-circular plate 67, impacts one side of the impeller 66, causing both the upper and lower shafts 65 to rotate forward. This drives the outer gear ring 69 to rotate in reverse. The outer gear ring 69 drives the fixed rod 610 and the screw 615 to rotate. The outer gear ring 69 also drives the connecting piece 611 and the baffle plate 612 to rotate. Guided by the wave groove inside the inner ring body 614, the baffle plate 612 drives the inner shaft to rotate. The inner shaft acts on the connecting piece 611, causing the baffle plate 612 to rotate and deflect simultaneously, thereby agitating and mixing the natural gas and water vapor and prolonging the mixing process. During the reaction, the rotation of screw 615 also drives the blocking ring 616 to move linearly. The rotation of the blocking ring 616 pushes the natural gas and water vapor back again, which facilitates uniform mixing while premixing, thus enabling the subsequent hydrogen production reaction to proceed efficiently. The hot water in the spiral tube 64 then flows into the preheating cylinder 61, which simultaneously preheats the incoming natural gas and water vapor. After thorough mixing, the valve of the connecting pipe 3 is opened, allowing the mixed natural gas and water vapor to enter the reactor body 4 for reaction. By rotating the internal gear ring 618, the volume ratio of natural gas to water vapor is kept approximately 1:5 while adjusting the gas flow rate, ensuring the hydrogen production reaction is complete and stable, and also ensuring that the catalyst inside the reactor body 4 is fully utilized.

[0044] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas mixing device for hydrogen production from natural gas, comprising a base plate (1) and a mixing cylinder (2) and a reactor body (4) fixedly installed on the top of the base plate (1). characterized in that Also includes: An outlet pipe (5) is fixedly installed on the top of the reactor body (4), a premixing component (6) is provided on the outside of the mixing cylinder (2), the outlet pipe (5) is bent downwards, and a waste heat recovery component (7) is provided on the outside of the bend of the outlet pipe (5). A steam pipe (8) is fixedly installed on the upper side of one side of the mixing cylinder (2), and a natural gas pipe (9) is fixedly installed on the lower side of one side of the mixing cylinder (2). The waste heat recovery assembly (7) includes a recovery cylinder (71) fixedly installed on the outside of the gas outlet pipe (5). The premixing component (6) includes a preheating cylinder (61) that is sleeved and fixedly installed on the outside of the mixing cylinder (2). A connecting pipe (62) is fixedly connected between the preheating cylinder (61) and the recovery cylinder (71). A pump body (63) is fixedly installed on the outside of the connecting pipe (62). A spiral pipe (64) is fixedly connected inside the preheating cylinder (61).

2. The gas mixing device for hydrogen production from natural gas according to claim 1, characterized in that: A connecting pipe (3) connects the mixing cylinder (2) and the reactor body (4). One end of the spiral tube (64) is connected to the connecting pipe (62). Two rotating shafts (65) are rotatably connected inside the preheating cylinder (61). The rotating shafts (65) are rotatably connected to the spiral tube (64). An external gear ring (69) is rotatably installed inside the mixing cylinder (2). The other end of the spiral tube (64) is connected to the inside of the preheating cylinder (61). An impeller (66) is fixedly connected to the outside of the rotating shaft (65). A semi-circular plate (67) is fixedly connected to the inside of the spiral tube (64). One end of the rotating shaft (65) passes through the preheating cylinder (61) and is fixedly connected to a connecting gear (68). Both the upper and lower connecting gears (68) are meshed with the external gear ring (69).

3. A gas mixing device for hydrogen production from natural gas according to claim 2, characterized in that: A fixing rod (610) is fixedly connected to the middle of the inner side of the external gear ring (69). Multiple sets of connecting plates (611) are symmetrically and rotatably installed on the outer side of the external gear ring (69). Each set of connecting plates (611) includes two pieces. The two connecting plates (611) are rotatably connected to the blocking plate (612) through an inner shaft. A torsion spring (613) is sleeved on the outer side of the inner shaft. The two ends of the torsion spring (613) are fixedly connected to the connecting plate (611) and the blocking plate (612) respectively.

4. A gas mixing device for hydrogen production from natural gas according to claim 3, characterized in that: The inner wall of the mixing cylinder (2) is also fixedly connected to an inner ring body (614), the inner ring of the inner ring body (614) is provided with a wave groove, a screw (615) is fixedly connected to one side of the fixing rod (610), a blocking ring (616) is threadedly connected to the outer side of the screw (615), and a limit strip (617) is also fixedly connected to the inner wall of the mixing cylinder (2), the blocking ring (616) and the limit strip (617) are slidably connected.

5. A gas mixing device for hydrogen production from natural gas according to claim 1, characterized in that: An internal gear ring (618) is rotatably mounted on one side of the top of the base plate (1). A side plate (619) is fixedly connected to the top of the base plate (1). An upper lead screw (620) is rotatably connected to the upper part of the side plate (619). A large gear (621) is fixedly connected to one end of the upper lead screw (620). A lower lead screw (622) is rotatably connected to the lower part of the side plate (619). A small gear (623) is fixedly connected to one end of the lower lead screw (622). Both the large gear (621) and the small gear (623) are meshed with the internal gear ring (618).

6. A gas mixing device for hydrogen production from natural gas according to claim 5, characterized in that: The circumference of the large gear (621) is five times that of the small gear (623). The outer sides of the upper lead screw (620) and the lower lead screw (622) are threaded with adjusting plates (624). The ends of the steam pipe (8) and the natural gas pipe (9) are fixedly connected with adjusting pipes (625). The adjusting plate (624) is slidably connected to the adjusting pipe (625). The inside of the adjusting pipe (625) is fixedly connected with a fixing plate (626). The inside of the fixing plate (626) is provided with a square groove (627).

7. A gas mixing device for hydrogen production from natural gas according to claim 1, characterized in that: A water supply pipe (72) is fixedly connected to one side of the top of the recycling cylinder (71). A drain pipe (73) and a drive motor (74) are also fixedly installed on the outside of the recycling cylinder (71). An inner rod (75) is fixedly connected to the output end of the drive motor (74) through the recycling cylinder (71). A stirring plate (76) is symmetrically fixedly connected to the outside of the inner rod (75).

8. A gas mixing device for hydrogen production from natural gas according to claim 7, characterized in that: A sleeve (77) is rotatably connected to the outside of the air outlet pipe (5). A vertical strip plate (78) is symmetrically fixedly connected to the outside of the sleeve (77). The stirring plate (76) and the vertical strip plate (78) are spaced apart. An arc groove (79) is also opened on the outside of the sleeve (77). An inner scraper (710) is symmetrically fixedly connected to the inner wall of the sleeve (77).

9. A gas mixing device for hydrogen production from natural gas according to claim 1, characterized in that: The bottom of the recycling cylinder (71) is fixedly connected to a support plate (10), the bottom of the support plate (10) is fixedly connected to the bottom plate (1), and the bottom of the mixing cylinder (2) is fixedly installed with a water outlet pipe (11), which passes through the preheating cylinder (61) and is connected to the outside.

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