Ammonia cracking hydrogen production reaction device
By using a stirring mechanism and filter plate structure driven by a servo motor in the ammonia cracking hydrogen production reaction device, the uneven mixing problem caused by uneven gas flow is solved, the reaction rate and hydrogen purity are improved, and the automatic catalyst removal and hydrogen gas are achieved. Concentration optimization.
Patent Information
- Application Number
- CN202411416531.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-01-14
AI Technical Summary
In the ammonia cracking hydrogen production reaction device, the uneven flow rate of the internal gas leads to uneven mixing of ammonia and the catalyst, which reduces the reaction rate and efficiency.
An ammonia cracking hydrogen production reaction device including a cracking furnace, an inner liner furnace, a heating unit, a stirring mechanism driven by a servo motor and a filter plate structure is designed. The driving wheel drives the driven wheel and the driven wheel are meshed to drive the stirring shaft and the filter plate. Rotate to achieve intermittent movement, enhance the catalyst action, and eliminate catalysts with low activity through the filter holes.
It effectively improves the mixing uniformity and reaction rate of ammonia and catalyst, improves the purity and yield of hydrogen, and optimizes the use of catalysts and hydrogen concentration through the automatic roll-off mechanism.
Smart Images
Figure CN119303506A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of hydrogen production by cracking ammonia, and in particular relates to a hydrogen production reaction device by cracking ammonia. Background Art
[0002] Ammonia decomposition to produce hydrogen is a conventional hydrogen production process that can decompose into nitrogen, hydrogen, and a mixture of some undecomposed ammonia and water. The mixed gas is then purified to produce high-purity hydrogen.
[0003] Nowadays, by setting a stirring mechanism in the cracking furnace, the flow of stirring active gas in the device is enhanced, which is conducive to more complete contact between ammonia and catalyst and makes the gas mixing more uniform, which can improve the reaction rate and efficiency.
[0004] It was found that when the ammonia cracking hydrogen production reaction device is in operation, the flow rate of the gas inside the device will affect the mixing effect of ammonia and catalyst. When the speed of the internal rotating device is uneven, it will cause insufficient flow of gas inside the device, which will lead to uneven mixing of ammonia and catalyst, and reduce the reaction rate of the mixing.
[0005] To this end, the present invention provides an ammonia cracking hydrogen production reaction device. Summary of the invention
[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.
[0007] The technical solution adopted by the present invention to solve its technical problem is: an ammonia cracking hydrogen production reaction device described in the present invention comprises a cracking furnace; an inner tank furnace and a heating unit are arranged inside the cracking furnace; a transmission shaft is rotatably connected to the outer surface of the inner tank furnace; one end of the transmission shaft is fixedly connected to the output end of the servo motor; the other end of the transmission shaft is fixedly connected to a driving wheel and an incomplete gear; a support column is fixedly connected to the middle of the cracking furnace; a stirring shaft is rotatably connected to the middle of the support column; one end of the stirring shaft is fixedly connected to a driven wheel; a rotating shaft is rotatably connected inside the stirring shaft; one end of the rotating shaft is fixedly connected to a driven gear; the outer surface of the stirring shaft is fixedly connected to the middle of a cross bar; a plurality of stirring rods are fixedly connected to the lower end of the cross bar; the bottom of the stirring shaft passes through a first filter plate; a fixed shaft sleeve is arranged on the lower surface of the first filter plate; the first filter plate is rotatably connected to a second filter plate through a fixed shaft sleeve; the second filter plate is fixedly connected to the bottom end of the rotating shaft.
[0008] Preferably, filter holes are provided on the surfaces of the first filter plate and the second filter plate and penetrate the first filter plate and the second filter plate, wherein the filter holes of the first filter plate and the second filter plate are arranged in a one-to-one correspondence and the pore size of the filter holes is larger than the particle size of the catalyst.
[0009] Preferably, the lower surface of the second filter plate is fixedly connected to a sleeve arranged concentrically with the rotating shaft; the lower end of the rotating shaft is threadedly connected with a pin rod; slots are provided on both sides of the sleeve, and the pin rod is inserted through the slots.
[0010] Preferably, both ends of the pin rod are provided with limiting holes, and when the rotating shaft drives the second filter plate to rotate, the inner side of the slot hole is inserted into the limiting hole.
[0011] Preferably, cleaning brushes are fixedly connected to both ends of the cross bar and fit tightly to the inner wall of the inner tank furnace.
[0012] Preferably, the outer surface of the cracking furnace is respectively provided with a feed hole, an ammonia feed hole, a gas outlet hole, a nitrogen discharge hole, and a discharge hole, and all of them penetrate and are connected to the outer surface of the inner tank furnace.
[0013] Preferably, the inner bottom surface of the inner tank furnace is a curved structure, and is gradually concave from all sides toward the discharge hole, so that the catalyst automatically rolls into the discharge hole.
[0014] The beneficial effects of the present invention are as follows:
[0015] 1. In the ammonia cracking hydrogen production reaction device described in the present invention, this step can realize that the servo motor drives the driving wheel to mesh with the driven wheel, so that the stirring mechanism can rotate, and can also realize that the servo motor drives the incomplete gear to mesh with the driven gear, so that the rotating shaft drives the second filter plate to rotate. Because there will be intermittent movement when the incomplete gear and the driven gear are meshed, the effect of the bottom catalyst can be effectively improved.
[0016] 2. The ammonia cracking hydrogen production reaction device described in the present invention is arranged in a one-to-one correspondence between the filter holes of the first filter plate and the second filter plate, and the filter hole diameters of the first filter plate and the second filter plate are greater than or equal to the particle size of the catalyst, so that the catalyst with lower activity in the bottom layer can be discharged from the filter holes to the bottom of the inner tank furnace, and finally discharged from the discharge hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described below in conjunction with the accompanying drawings.
[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the present invention,
[0019] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the present invention,
[0020] Figure 3 is a schematic diagram of the gear meshing structure in the present invention,
[0021] Figure 4 is a schematic diagram of the filter plate structure in the present invention,
[0022] Figure 5is a schematic diagram of the stirring mechanism structure in the present invention,
[0023] Figure 6 It is a structural schematic diagram of the shaft sleeve in the present invention.
[0024] In the figure: 1, cracking furnace, 101, feed hole, 102, ammonia inlet hole, 103, air outlet, 104, nitrogen discharge hole, 105, discharge hole, 2, liner furnace, 3, transmission shaft, 4, driving wheel, 5, incomplete gear, 6, driven wheel, 7, driven gear, 8, stirring shaft, 9, bushing, 10, pin rod, 11, limit hole, 12, support column, 13, support frame, 14, cross bar, 15, stirring rod, 16, cleaning brush, 17, first filter plate, 18, second filter plate, 19, rotating shaft, 20, servo motor, 21, slot hole. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] Specific examples are given below.
[0027] like Figure 2 , Figure 3 and Figure 5As shown, an ammonia cracking hydrogen production reaction device comprises a cracking furnace 1; an inner furnace 2 and a heating unit are arranged inside the cracking furnace 1; the outer surface of the transmission shaft 3 is rotatably connected to the inner side of the support frame 13; the outer surface of the inner furnace 2 is rotatably connected to the transmission shaft 3; one end of the transmission shaft 3 is fixedly connected to the output end of the servo motor 20; the other end of the transmission shaft 3 is fixedly connected to a driving wheel 4 and an incomplete gear 5; a support column 12 is fixedly connected to the middle of the cracking furnace 1; a stirring shaft 12 is rotatably connected to the middle of the support column 12 The stirring shaft 8 is fixedly connected to a driven wheel 6 at one end; the stirring shaft 8 is internally connected to a rotating shaft 19; one end of the rotating shaft 19 is fixedly connected to a driven gear 7; the outer surface of the stirring shaft 8 is fixedly connected to the middle of the cross bar 14; the lower end of the cross bar 14 is fixedly connected to a plurality of stirring rods 15; the bottom of the stirring shaft 8 passes through the first filter plate 17, and when working, the servo motor 20 is used to drive the transmission shaft 3 to rotate, thereby driving the driving wheel 4 and the incomplete gear 5 to rotate, and then through the stirring shaft 8 The top of the stirring shaft 8 is provided with a driven wheel 6 and a driven gear 7 that meshes with the driving wheel 4 and the incomplete gear 5. The driving wheel 4 and the driven wheel 6 are meshed, and the cross bar 14 is fixedly connected to the outer surface of the stirring shaft 8, so that the servo motor 20 can rotate the stirring mechanism. The stirring shaft 8 is connected to the inner rotation of the rotating shaft 19, and the incomplete gear 5 and the driven gear 7 are meshed, so that the rotation of the rotating shaft 19 can be realized. The first filter plate 17 is penetrated through the bottom of the stirring shaft 8, and a fixed cross bar 14 is fixedly connected to the outer surface of the stirring shaft 8. The sleeve is rotatably connected to the second filter plate 18, and is fixed to the bottom of the rotating shaft 19 through the second filter plate 18. This step can realize that the servo motor 20 drives the driving wheel 4 to engage with the driven wheel 6, so that the stirring mechanism can be rotated. The servo motor 20 can also drive the incomplete gear 5 to engage with the driven gear 7, so that the rotating shaft 19 can drive the second filter plate 18 to rotate. Because there will be intermittent movement when the incomplete gear 5 is engaged with the driven gear 7, the effect of the bottom catalyst can be effectively enhanced.
[0028] like Figure 4 As shown, the lower surface of the first filter plate 17 is fixedly connected to a fixed shaft sleeve; the upper surface of the second filter plate 18 is rotatably connected to the upper end of the fixed shaft sleeve. During operation, a fixed shaft sleeve is welded to the lower surface of the first filter plate 17, and the second filter plate 18 is rotatably connected to the fixed shaft sleeve. This step can realize that the rotating shaft 19 drives the second filter plate 18 to rotate.
[0029] like Figure 5As shown, the lower surface of the second filter plate 18 is fixedly connected to the shaft sleeve 9 which is arranged concentrically with the rotating shaft 19; the lower end of the rotating shaft 19 is threadedly connected with a pin rod 10; both sides of the shaft sleeve 9 are provided with slot holes 21, and the pin rod 10 is inserted through the slot holes 21. During operation, the shaft sleeve 9 is provided with slot holes 21 on both sides, and the rotating shaft 19 is threadedly connected with the pin rod 10. The pin rod 10 is inserted through the slot holes 21. This step can realize the convenient disassembly of the pin rod 10 for later maintenance.
[0030] like Figure 6 As shown, both ends of the pin rod 10 are provided with limiting holes 11, and when the rotating shaft 19 drives the second filter plate 18 to rotate, the inner side of the slot hole 21 is inserted into the limiting hole 11. When the second filter plate 18 is driven to rotate by the rotating shaft 19 during operation, the inner side surface of the slot hole 21 is inserted into the inner side of the limiting hole 11. This step can achieve that when the rotating shaft 19 drives the second filter plate 18 to rotate through the pin rod 10, the side wall of the sleeve 9 is inserted into the slot hole 21, which can limit the axial movement of the pin rod 10, avoid high temperature environment, affect the reliability of the cooperation between the pin rod 10 and the rotating shaft 19, and cause the pin rod 10 to fall off the rotating shaft 19, thereby effectively improving the overall reliability.
[0031] like Figure 1 As shown, cleaning brushes 16 are fixedly connected to both ends of the cross bar 14 and fit tightly against the inner wall of the inner tank stove 2. When working, the cleaning brush 16 can be driven to rotate by the rotation of the stirring mechanism. In this step, the cleaning brush 16 fits tightly against the inner wall of the inner tank stove 2, so as to clean the inner wall of the inner tank stove 2.
[0032] like Figure 5 As shown, the outer surface of the cracking furnace 1 is respectively provided with a feed hole 101, an ammonia feed hole 102, an air outlet 103, a nitrogen exhaust hole 104, and a discharge hole 105, and all of them are connected to the outer surface of the inner tank furnace 2. When working, the feed hole 101, the ammonia feed hole 102, the air outlet 103 and the nitrogen exhaust hole 104 are all penetrated to the outside of the cracking furnace 1, the ammonia feed hole 102 is used to inject liquid ammonia into the inner tank furnace 2, the air outlet 103 is used to discharge the gas after ammonia decomposition in the inner tank furnace 2, and the nitrogen exhaust hole 104 is connected to the bottom of the inner tank furnace 2 to discharge the catalyst with low activity. This step can realize the full utilization of each hole.
[0033] like Figure 2 As shown, the inner bottom surface of the inner tank furnace 2 is a curved surface structure, and is gradually concave from all sides toward the position of the discharge hole 105, so that the catalyst automatically rolls into the discharge hole 105. During operation, it is rotated by the stirring mechanism to make the low-activity catalyst fall from the filter hole to the bottom. The inner bottom surface of the inner tank furnace 2 is a curved surface structure. This step can achieve that the low-activity catalyst can automatically roll into the discharge hole 105, thereby affecting the concentration of hydrogen.
[0034] Working principle: during operation, the servo motor 20 drives the transmission shaft 3 to rotate, thereby driving the driving wheel 4 and the incomplete gear 5 to rotate, and the driven wheel 6 and the driven gear 7 are provided at the top of the stirring shaft 8 to mesh with the driving wheel 4 and the incomplete gear 5. The driving wheel 4 and the driven wheel 6 are meshed, and the cross bar 14 is fixedly connected to the outer surface of the stirring shaft 8, so that the servo motor 20 can rotate the stirring mechanism, and the stirring shaft 8 is connected to the internal rotation of the rotating shaft 19, and the rotation of the rotating shaft 19 can be realized through the meshing of the incomplete gear 5 and the driven gear 7. The bottom of the stirring shaft 8 passes through the first filter plate 17, and the second filter plate 18 is rotatably connected through a fixed sleeve at the bottom of the first filter plate 17, and the second filter plate 18 is rotatably connected through the first filter plate 17. The second filter plate 18 is fixed at the bottom of the rotating shaft 19. This step can realize that the servo motor 20 drives the driving wheel 4 to mesh with the driven wheel 6, so that the stirring mechanism can be rotated. The servo motor 20 can also drive the incomplete gear 5 to mesh with the driven gear 7, so that the rotating shaft 19 can drive the second filter plate 18 to rotate. Because there will be intermittent movement when the incomplete gear 5 and the driven gear 7 are meshed, the effect of the bottom catalyst can be effectively improved. During operation, the first filter plate 17 and the second filter plate 18 are both provided with through filter holes, and the catalyst can fall to the bottom layer through these through filter holes. In this step, the filter holes of the first filter plate 17 and the second filter plate 18 are arranged in a one-to-one correspondence, and the filter holes of the first filter plate 17 and the second filter plate 18 The aperture is greater than or equal to the particle size of the catalyst, so that the catalyst with lower activity in the bottom layer can be discharged from the filter hole to the bottom of the inner tank furnace 2, and finally discharged from the discharge hole 105. During operation, slots 21 are respectively provided on both sides of the sleeve 9, and the rotating shaft 19 is threadedly connected with a pin rod 10, and the pin rod 10 is inserted through the slot 21. This step can realize the convenient disassembly of the pin rod 10 for later maintenance. When the second filter plate 18 is driven to rotate by the rotating shaft 19 during operation, the inner side of the slot 21 is inserted into the inner side of the limiting hole 11. This step can realize that when the rotating shaft 19 drives the second filter plate 18 to rotate through the pin rod 10, the side wall of the sleeve 9 is inserted into the slot 21, which can limit the axial movement of the pin rod 10, avoid high temperature environment, and affect the reliability of the fit between the pin rod 10 and the rotating shaft 19. The pin rod 10 falls off from the rotating shaft 19, thereby effectively improving the overall reliability. The rotation of the stirring mechanism during operation can drive the cleaning brush 16 to rotate. In this step, the cleaning brush 16 is tightly attached to the inner wall of the inner tank furnace 2, so that the inner wall of the inner tank furnace 2 can be cleaned. During operation, the feed hole 101, the ammonia inlet hole 102, the gas outlet hole 103 and the nitrogen exhaust hole 104 all penetrate the outside of the cracking furnace 1. The ammonia inlet hole 102 is used to inject liquid ammonia into the inner tank furnace 2, the gas outlet hole 103 is used to discharge the gas after ammonia decomposition in the inner tank furnace 2, and the nitrogen exhaust hole 104 is connected to the bottom of the inner tank furnace 2 to discharge the catalyst with low activity. This step can make full use of each hole. The stirring mechanism is rotated during operation.The catalyst with low activity falls from the filter hole to the bottom, and then passes through the inner bottom surface of the inner tank furnace 2, which has a curved surface structure. This step can realize that the catalyst with low activity can automatically roll down to the inside of the discharge hole 105, thereby affecting the concentration of hydrogen.
[0035] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An ammonia cracking hydrogen production reaction device, characterized in that: The invention comprises a cracking furnace (1) and a conveying pipeline assembly; the characteristics are as follows: an inner tank furnace (2) and a heating unit are fixedly connected inside the cracking furnace (1); a transmission shaft (3) is rotatably connected to the outer surface of the inner tank furnace (2); the outer surface of the transmission shaft (3) is rotatably connected to the inner side of a support frame (13); one end of the transmission shaft (3) is fixedly connected to the output end of a servo motor (20); the other end of the transmission shaft (3) is fixedly connected to a driving wheel (4) and an incomplete gear (5); a support column (12) is fixedly connected to the middle of the cracking furnace (1); the support column (13) is fixedly connected to the inner side of a support frame (13); the inner tank furnace (2) is fixedly connected to the outer surface of the transmission shaft (3 ... the outer surface of the transmission shaft (3) is rotatably connected to the inner side of a support frame (13); the outer surface of the transmission shaft (3) is rotatably connected to the inner side of a support frame (13); the outer surface of the transmission shaft (3) is rotatably connected to the inner side of a support frame (13); the outer surface of the transmission shaft (3) is rotatably connected to the inner side of a support frame (13 The middle part of the support column (12) is rotatably connected to a stirring shaft (8); one end of the stirring shaft (8) is fixedly connected to a driven wheel (6); the inside of the stirring shaft (8) is rotatably connected to a rotating shaft (19); one end of the rotating shaft (19) is fixedly connected to a driven gear (7); the outer surface of the stirring shaft (8) is fixedly connected to the middle part of the cross bar (14); the lower end of the cross bar (14) is fixedly connected to a plurality of stirring rods (15); the bottom of the stirring shaft (8) passes through a first filter plate (17); and the bottom end of the rotating shaft (19) is fixedly connected to a second filter plate (18).
2. The ammonia cracking hydrogen production reaction device according to claim 1, characterized in that: The lower surface of the first filter plate (17) is fixedly connected to a fixed shaft sleeve; the upper surface of the second filter plate (18) is rotatably connected to the upper end of the fixed shaft sleeve.
3. The ammonia cracking hydrogen production reaction device according to claim 1, characterized in that: The lower surface of the second filter plate (18) is fixedly connected to a shaft sleeve (9) arranged concentrically with the rotating shaft (19); a pin rod (10) is threadedly connected to the lower end of the rotating shaft (19); slot holes (21) are provided on both sides of the shaft sleeve (9), and the pin rod (10) is inserted through the slot holes (21).
4. The ammonia cracking hydrogen production reaction device according to claim 3, characterized in that: Both ends of the pin rod (10) are provided with limiting holes (11), and when the rotating shaft (19) drives the second filter plate (18) to rotate, the inner side of the slot hole (21) is inserted into the limiting hole (11).
5. The ammonia cracking hydrogen production reaction device according to claim 1, characterized in that: Cleaning brushes (16) are fixedly connected to both ends of the cross bar (14) and are tightly fitted to the inner wall of the inner tank furnace (2).
6. The ammonia cracking hydrogen production reaction device according to claim 1, characterized in that: The side wall of the inner tank furnace (2) is fixedly connected with a feed hole (101); the side wall of the inner tank furnace (2) is fixedly connected with an ammonia feed hole (102); the side wall of the inner tank furnace (2) is fixedly connected with an air outlet hole (103); the side wall of the inner tank furnace (2) is fixedly connected with a nitrogen discharge hole (104); the side wall of the inner tank furnace (2) is fixedly connected with a discharge hole (105); the feed hole (101), the ammonia feed hole (102), the air outlet hole (103) and the nitrogen discharge hole (104) penetrate the side wall of the cracking furnace (1) and are fixedly connected to the inner tank furnace (2).
7. The ammonia cracking hydrogen production reaction device according to claim 1, characterized in that: The lower end surface of the inner tank furnace (2) is in a curved structure.