Stirring-adjustable urea hydrolysis reactor

Abstract

The invention discloses a stirring-adjustable urea hydrolysis reactor, and particularly relates to the technical field of hydrolysis reactors. The axial stirring mechanism is mounted at the upper part of the hydrolysis kettle, is connected with the stirring blades and can drive the stirring blades to lift, so that axial stirring along the hydrolysis kettle is realized; the radial stirring mechanism is mounted in the hydrolysis kettle and can drive stirring blades to rotate so as to realize radial stirring along the hydrolysis kettle; and the angle adjusting mechanism is mounted in the hydrolysis kettle and can adjust the angle of the stirring blade. By arranging the angle adjusting mechanism, the inclination angle between the stirring blades and the horizontal plane is adjusted to be increased, materials are turned over up and down more violently, urea solutions at different heights can be fully mixed, and parameters such as concentration and temperature in the axial direction are more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrolysis reactors, and more particularly to a stirring adjustable urea hydrolysis reactor. Background Art

[0002] With increasing environmental protection requirements, urea hydrolysis technology plays an important role in multiple fields. In areas such as flue gas denitrification, the ammonia produced by urea hydrolysis can be used to remove nitrogen oxides from flue gas, reducing air pollution. The efficiency and stability of the urea hydrolysis reaction directly affect the effectiveness of these applications.

[0003] After searching, Chinese patent publication number CN218189666U discloses a urea solution hydrolysis reactor for vehicles. To address the problem that the urea solution is stirred by a motor-driven stirring unit in the cited device, the mixing effect of the solution is limited. The patent application drives a piston to move up and down in a piston groove. When the piston moves upward, the solution in the shell can be extracted, and when the piston moves downward, the solution can be re-injected into the shell, thereby improving the mixing effect of the solution in the shell and further improving the hydrolysis efficiency of the urea solution.

[0004] During use, the urea hydrolysis reactor has a relatively simple stirring mode, the angle of the stirring blade is usually not adjustable, and the degree of axial and radial mixing cannot be flexibly adjusted according to actual needs. Urea solutions at different heights are prone to uneven concentration and temperature. At the same time, the stirring depth cannot be adjusted according to different reaction stages and reactor loading, making it difficult to accurately control the stirring effect during the reaction process, resulting in waste of stirring energy or uneven reaction. Summary of the Invention

[0005] In order to overcome the problems and defects in the prior art, the present invention provides a stirring adjustable urea hydrolysis reactor to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A stirring adjustable urea hydrolysis reactor comprising:

[0008] hydrolysis kettle;

[0009] An axial stirring mechanism is installed on the upper part of the hydrolysis kettle and is connected to a stirring blade, which can drive the stirring blade to rise and fall, thereby achieving axial stirring along the hydrolysis kettle;

[0010] A radial stirring mechanism is installed in the hydrolysis kettle, capable of driving the stirring blades to rotate, thereby achieving radial stirring along the hydrolysis kettle;

[0011] The angle adjustment mechanism is installed in the hydrolysis kettle and can adjust the angle of the stirring blade.

[0012] In one possible design, the axial stirring mechanism includes:

[0013] A cylinder is installed on the top of the inner wall of the hydrolysis kettle;

[0014] A fixed shell, the top of which is connected to the bottom of the cylinder;

[0015] A fixing plate, mounted on the bottom of the fixing shell;

[0016] A rotating shell is slidably mounted on the bottom of the fixed plate;

[0017] The stirring blade is rotatably mounted on the outer periphery of the rotating shell.

[0018] In one possible design, the radial stirring mechanism includes:

[0019] a first motor, fixedly mounted on the top of the inner wall of the fixed housing;

[0020] The rotating shaft has a top connected to the output end of the first motor and a bottom fixedly connected to the top of the rotating shell.

[0021] In a possible design, a circular sliding groove is provided at the bottom of the fixed plate, and a sliding block is provided at the top of the rotating shell, and the sliding block is embedded in the sliding groove.

[0022] In one possible design, the angle adjustment mechanism includes:

[0023] Second motor;

[0024] a threaded rod connected to an output end of the second motor;

[0025] A threaded sleeve, sleeved on the outer circumference of the threaded rod and threadedly connected to the threaded rod;

[0026] A movable tooth plate, one side of which is fixedly connected to the threaded sleeve;

[0027] The gear is engaged with the other side of the movable tooth plate and is fixedly connected to the stirring blade.

[0028] In a possible design, the gear is fixedly connected to the rotating rod, the gear and the rotating rod are coaxially arranged, and the rotating rod passes through the rotating shell and is fixedly connected to the stirring blade.

[0029] In one possible design, the angle adjustment mechanism further includes:

[0030] The fixed housing is fixedly connected to the rotating housing and is sleeved on the outer periphery of the second motor, the threaded rod, the threaded sleeve, the movable gear plate and the gear.

[0031] In a possible design, the second motor is located on the top of the inner wall of the fixed housing.

[0032] In a possible design, a vertically arranged limiting groove is opened on one side of the fixed shell adjacent to the threaded sleeve, and a limiting slider is fixedly connected to one side of the threaded sleeve. The limiting slider is embedded in the limiting groove and can slide along the limiting groove.

[0033] In one possible design, the top of the hydrolysis kettle is fixedly connected to a fixing rod, the top of the fixing rod is fixedly connected to a mounting plate, and the top of the cylinder passes through the hydrolysis kettle and the mounting plate in sequence;

[0034] Both sides of the hydrolysis kettle are fixedly connected to support columns;

[0035] One side of the hydrolysis kettle is fixedly connected to a feed pipe, and the bottom of the hydrolysis kettle is fixedly connected to a discharge pipe.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. By setting up an axial stirring mechanism and an angle adjustment mechanism, after the stirring blade is adjusted to a larger inclination angle with the horizontal plane, the material is flipped up and down more violently, so that the urea solutions at different heights in the reactor can be fully mixed, ensuring that the concentration, temperature and other parameters of the reaction system in the axial direction are more uniform. When it is necessary to focus on radial mixing, the radial stirring mechanism is turned on. At the same time, the angle adjustment mechanism is used to accurately adjust the angle of the stirring blade to make it more horizontal, thereby generating a stronger radial force on the surrounding materials. This makes the materials circulate more fully in the radial plane of the reactor and achieves more uniform mixing in the horizontal direction, which helps to optimize the distribution of reactants and products in the urea hydrolysis process and improve the overall efficiency of the reaction and product quality.

[0038] 2. By setting up an axial stirring mechanism and using a cylinder to drive the stirring blade to move up and down, the bottom material can be brought to the top and the top material can be pushed to the bottom, which greatly enhances the axial flow and mixing of the materials. At the same time, the cylinder adjusts the height of the stirring blade to achieve the effect of adjusting the stirring depth. For different reactor loadings or different reaction stages, adjusting the stirring depth can accurately control the stirring effect. In the early stage of urea hydrolysis reaction, when the amount of urea solution is small, the stirring depth can be appropriately reduced to make more effective use of the stirring energy; as the reaction proceeds and the amount of solution changes, the stirring depth is adjusted in time to ensure the uniformity and efficiency of the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0040] Figure 2It is a structural schematic diagram of the connection between the mounting plate and the stirring blade of the present invention.

[0041] Figure 3 For the present invention Figure 2 Rear view structure diagram.

[0042] Figure 4 For the present invention Figure 2 Side cross-sectional structural diagram.

[0043] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0044] The accompanying drawings are marked as follows: 1. Hydrolysis kettle; 2. Feed pipe; 3. Discharge pipe; 4. Cylinder; 5. Fixed shell; 6. First motor; 7. Fixed plate; 8. Rotating shaft; 9. Rotating shell; 10. Rotating rod; 11. Stirring blade; 12. Fixed shell; 13. Second motor; 14. Threaded rod; 15. Threaded sleeve; 16. Movable gear plate; 17. Gear; 18. Limiting slider; 19. Limiting slide groove; 20. Fixed rod; 21. Mounting plate; 22. Support column. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0046] The present invention provides a stirring adjustable urea hydrolysis reactor, Figure 1-5 As shown, the stirring-adjustable urea hydrolysis reactor includes: a hydrolysis kettle 1, a feed pipe 2 fixedly connected to one side of the hydrolysis kettle 1, a discharge pipe 3 fixedly connected to the bottom of the hydrolysis kettle 1, and an axial stirring mechanism provided on the upper portion of the hydrolysis kettle 1. The axial stirring mechanism is connected to a stirring blade 11, which can drive the stirring blade 11 to rise and fall, thereby achieving axial stirring along the hydrolysis kettle 1. A radial stirring mechanism and an angle adjustment mechanism are installed in the hydrolysis kettle 1. The radial stirring mechanism can drive the stirring blade 11 to rotate, thereby achieving radial stirring along the hydrolysis kettle 1, and the angle adjustment mechanism can adjust the inclination angle of the stirring blade 11.

[0047] In one possible design, the axial stirring mechanism includes: a cylinder 4, a fixed shell 5, a fixed plate 7, a rotating shell 9 and a stirring blade 11, the cylinder 4 is installed on the top of the inner wall of the hydrolysis tank 1; the top of the fixed shell 5 is connected to the bottom of the cylinder 4; the fixed plate 7 is installed at the bottom of the fixed shell 5; the rotating shell 9 is slidably installed at the bottom of the fixed plate 7; and the stirring blade 11 is rotatably installed on the outer periphery of the rotating shell 9.

[0048] During specific implementation, the piston of the cylinder 4 extends and retracts, and the piston end drives the fixed shell 5, the fixed plate 7, the rotating shell 9 and the stirring blade 11 to move up and down synchronously, thereby achieving vertical stirring of the liquid in the hydrolysis kettle 1.

[0049] In one possible design, the radial stirring mechanism includes: a first motor 6 and a rotating shaft 8. The first motor 6 is fixedly mounted on the top of the inner wall of the fixed shell 5. The top of the rotating shaft 8 is connected to the output end of the first motor 6, and the bottom is fixedly connected to the top of the rotating shell 9. The rotating shaft 8 passes through the fixed plate 7. In other words, the fixed plate 7 is mounted on the outer periphery of the rotating shaft 8. The rotation of the rotating shaft 8 does not cause the fixed plate 7 to move.

[0050] In specific implementation, the first motor 6 drives the rotating shaft 8 to rotate, and the rotating shaft 8 drives the rotating shell 9 to rotate, thereby driving the stirring blade 11 to rotate along the radial direction of the hydrolysis tank 1, thereby achieving horizontal stirring of the material liquid in the hydrolysis tank 1.

[0051] In one possible design, a circular slot is defined at the bottom of the fixed plate 7, and a slider is positioned at the top of the rotating housing 9, which engages within the slot. This design allows the first motor 6 to rotate the rotating housing 9 via the rotating shaft 8, while also enabling the cylinder 4 to raise and lower the rotating housing 9 via the fixed housing 5 and the fixed plate 7, without the slider falling out of the slot.

[0052] In a possible design, the angle adjustment mechanism includes: a second motor 13, a threaded rod 14, a threaded sleeve 15, a movable tooth plate 16 and a gear 17. The output end of the second motor 13 is connected to the threaded rod 14. The threaded sleeve 15 is sleeved on the outer periphery of the threaded rod 14 and is threadedly connected to the threaded rod 14. One side of the movable tooth plate 16 is fixedly connected to the threaded sleeve 15. The gear 17 is engaged with the other side of the movable tooth plate 16 and is fixedly connected to the stirring blade 11.

[0053] During specific implementation, the second motor 13 drives the threaded rod 14 to rotate, and the rotation of the threaded rod 14 drives the threaded sleeve 15 to rise and fall. The threaded sleeve 15 drives the gear 17 to rotate by moving the tooth plate 16, and then drives the stirring blade 11 to rotate along the axis of the gear 17, thereby realizing the adjustment of the inclination angle of the stirring blade 11 with the horizontal plane.

[0054] In one possible design, the gear 17 is fixedly connected to the rotating rod 10. The gear 17 and the rotating rod 10 are coaxially arranged. The rotating rod 10 passes through the rotating housing 9 and is fixedly connected to the stirring blade 11. In a specific implementation, the gear 17 drives the rotating rod 10 to rotate synchronously, and the rotating rod 10 drives the stirring blade 11 to rotate, thereby adjusting the inclination angle of the stirring blade 11 with respect to the horizontal plane.

[0055] In one possible design, the angle adjustment mechanism further includes a fixed housing 12, which is sealed and fixedly connected to the rotating housing 9 and is mounted on the outer periphery of the second motor 13, threaded rod 14, threaded sleeve 15, movable tooth plate 16, and gear 17. This design prevents the liquid from entering the fixed housing 12 and interfering with the operation of the second motor 13, threaded rod 14, threaded sleeve 15, movable tooth plate 16, and gear 17, thereby preventing the adjustment of the inclination angle of the stirring blade 11 relative to the horizontal plane.

[0056] In a possible design, the second motor 13 is located on the top of the inner wall of the fixed housing 12 , thereby achieving fixation of the second motor 13 .

[0057] In one possible design, a vertically disposed limiting slot 19 is provided on one side of the fixed housing 12 adjacent to the threaded sleeve 15. A limiting slider 18 is fixedly connected to one side of the threaded sleeve 15. The limiting slider 18 is embedded in the limiting slot 19 and can slide along the limiting slot 19. This design ensures that the movable tooth plate 16 and the threaded sleeve 15 can be vertically raised and lowered by the vertically disposed limiting slot 19 and the limiting slider 18.

[0058] In one possible design, the top of the hydrolysis kettle 1 is fixedly connected to a fixing rod 20, the top of the fixing rod 20 is fixedly connected to a mounting plate 21, and the top of the cylinder 4 sequentially passes through the hydrolysis kettle 1 and the mounting plate 21. By designing the hydrolysis kettle 1 and the mounting plate 21, the stability of the fixing of the cylinder 4 is improved. The cylinder 4 is fixedly connected to the mounting plate 21 and the hydrolysis kettle 1. The piston end of the cylinder 4 rises and falls, driving the stirring blade 11 to rise and fall.

[0059] Both sides of the hydrolysis kettle 1 are fixedly connected to support columns 22, thereby improving the stability of the hydrolysis kettle 1.

[0060] One side of the hydrolysis kettle 1 is fixedly connected to a feed pipe 2, and the bottom of the hydrolysis kettle 1 is fixedly connected to a discharge pipe 3.

[0061] Compared with the existing technology, this application has the following beneficial effects:

[0062] During hydrolysis, the discharge pipe 3 is closed and the cylinder 4 works to push the fixed shell 5, the first motor 6, the fixed plate 7, the rotating shaft 8, the rotating shell 9, the rotating rod 10, the stirring blade 11 and the fixed shell 12 to move up and down as a whole. Through this up and down movement, the stirring blade 11 is driven to move up and down in the hydrolysis tank 1, so that the material flows in the axial direction of the reactor and achieves axial mixing. The first motor 6 is started, driving the rotating shaft 8 to rotate, and then the rotating shell 9, the rotating rod 10 and the stirring blade 11 are rotated. While the stirring blade 11 is rotating, due to its up and down movement, it can more violently push the material to flip up and down in the axial direction. During the rising process, the stirring blade 11 brings the material at the bottom to the top; during the descending process, it pushes the material at the top to the bottom, thereby enhancing the axial mixing effect. At the same time, when it is necessary to strengthen the axial mixing, the stirring blade 11 is adjusted to a more inclined angle so that the material can flip up and down more violently in the hydrolysis tank 1.

[0063] When it is necessary to focus on radial mixing, the second motor 13 is started, driving the threaded rod 14 to rotate. The rotation of the threaded rod 14 causes the threaded sleeve 15 to move along the threaded rod 14, and the movable tooth plate 16 on one side of the threaded sleeve 15 moves accordingly. The movable tooth plate 16 engages with the gear 17, thereby driving the gear 17 to rotate. Since the interior of the gear 17 is fixedly connected to the rotating rod 10, the rotation of the gear 17 will cause the rotating rod 10 to rotate, and then adjust the angle of the stirring blade 11, appropriately reducing the blade angle. During the rotation of the rotating shell 9, the stirring blade 11 mainly generates a radial force on the surrounding material, pushing the material to circulate in the radial plane of the reactor, achieving more sufficient radial mixing, and allowing the material to be more fully mixed in the horizontal direction.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0066] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0067] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0068] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A stirring adjustable urea hydrolysis reactor, characterized in that: include: hydrolysis kettle (1); An axial stirring mechanism is installed on the upper part of the hydrolysis kettle (1), connected to the stirring blade (11), and can drive the stirring blade (11) to rise and fall, thereby achieving axial stirring along the hydrolysis kettle (1); A radial stirring mechanism is installed in the hydrolysis kettle (1) and can drive the stirring blade (11) to rotate, thereby achieving radial stirring along the hydrolysis kettle (1); An angle adjustment mechanism is installed in the hydrolysis kettle (1) and can adjust the angle of the stirring blade (11).

2. The stirring adjustable urea hydrolysis reactor according to claim 1, characterized in that The axial stirring mechanism comprises: A cylinder (4) is mounted on the top of the inner wall of the hydrolysis kettle (1); A fixed shell (5), the top of which is connected to the bottom of the cylinder (4); A fixing plate (7) is mounted on the bottom of the fixing shell (5); A rotating shell (9) is slidably mounted on the bottom of the fixed plate (7); The stirring blade (11) is rotatably mounted on the outer periphery of the rotating shell (9).

3. The stirring adjustable urea hydrolysis reactor according to claim 2, characterized in that The radial stirring mechanism comprises: A first motor (6) is fixedly mounted on the top of the inner wall of the fixed shell (5); The top of the rotating shaft (8) is connected to the output end of the first motor (6), and the bottom is fixedly connected to the top of the rotating shell (9).

4. The stirring adjustable urea hydrolysis reactor according to claim 2, characterized in that A circular sliding groove is provided at the bottom of the fixed plate (7), and a sliding block is provided at the top of the rotating shell (9), and the sliding block is embedded in the sliding groove.

5. The stirring adjustable urea hydrolysis reactor according to claim 2, characterized in that: The angle adjustment mechanism comprises: a second motor (13); a threaded rod (14) connected to an output end of the second motor (13); A threaded sleeve (15) is sleeved on the outer periphery of the threaded rod (14) and is threadedly connected to the threaded rod (14); A movable tooth plate (16), one side of which is fixedly connected to the threaded sleeve (15); The gear (17) is engaged with the other side of the movable tooth plate (16) and is fixedly connected to the stirring blade (11).

6. The stirring adjustable urea hydrolysis reactor according to claim 5, characterized in that: The gear (17) is fixedly connected to the rotating rod (10), and the gear (17) and the rotating rod (10) are coaxially arranged. The rotating rod (10) passes through the rotating shell (9) and is fixedly connected to the stirring blade (11).

7. The stirring adjustable urea hydrolysis reactor according to claim 5, characterized in that: The angle adjustment mechanism further comprises: The fixed housing (12) is fixedly connected to the rotating housing (9) and is sleeved on the outer periphery of the second motor (13), the threaded rod (14), the threaded sleeve (15), the movable tooth plate (16) and the gear (17).

8. The stirring adjustable urea hydrolysis reactor according to claim 7, characterized in that: The second motor (13) is located at the top of the inner wall of the fixed housing (12).

9. The stirring adjustable urea hydrolysis reactor according to claim 7, characterized in that: A vertically arranged limiting sliding groove (19) is provided on one side of the fixed housing (12) adjacent to the threaded sleeve (15); a limiting sliding block (18) is fixedly connected to one side of the threaded sleeve (15); the limiting sliding block (18) is embedded in the limiting sliding groove (19) and can slide along the limiting sliding groove (19).

10. The stirring adjustable urea hydrolysis reactor according to any one of claims 2 to 9, characterized in that: The top of the hydrolysis kettle (1) is fixedly connected to a fixing rod (20), the top of the fixing rod (20) is fixedly connected to a mounting plate (21), and the top of the cylinder (4) passes through the hydrolysis kettle (1) and the mounting plate (21) in sequence; Both sides of the hydrolysis kettle (1) are fixedly connected to support columns (22); One side of the hydrolysis kettle (1) is fixedly connected to a feed pipe (2), and the bottom of the hydrolysis kettle (1) is fixedly connected to a discharge pipe (3).

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