A rotary mixing device

Abstract

The utility model discloses a rotary mixing device for installing in the inner top of mixing tank, including rotation main part and a plurality of shower nozzles, rotation main part top end is equipped with swivel joint, and is connected with mixing tank through bearing assembly, and inside is equipped with premixing cavity, transition section, accelerating cavity in proper order, and premixing cavity contains helical guide vane, and accelerating cavity bottom is connected the shower nozzle through connecting pipe, the pipe body and the nozzle of the built -in stirring mechanism are contained to the shower nozzle, and high pressure gas liquid enters premixing cavity through swivel joint, and after guide, accelerate, flow into the shower nozzle, and are sprayed by the nozzle, and the device enlarges the mixing range through rotation, and the classified flow channel and stirring mechanism improve the uniformity of gas liquid mixing and the degree of liquid refinement, and the connecting structure guarantees the leakproofness and stability under high pressure, is applicable to ATMP processing, and effectively solves the problem of uneven mixing, the problem of insufficient refinement of existing equipment.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment, and in particular to a rotary mixing device. Background Technology

[0002] Amintrimethylphosphonic acid (ATMP) is an organophosphonic acid compound with excellent scale inhibition and corrosion inhibition properties, and is widely used in industrial circulating water treatment, boiler corrosion prevention, and petrochemical fields. The production process of ATMP requires key steps such as raw material dissolution, gas-liquid mixing, and fine dispersion. Among these, the uniformity and dispersion fineness of the gas-liquid mixture directly affect the final performance of the product.

[0003] In the prior art, equipment used for ATMP processing, such as the "Aminotrimethylphosphonic acid mixing tank" disclosed in patent CN202222552048.6, mainly achieves the spray dispersion of gas-liquid mixtures through fixed nozzles. However, this equipment has the following drawbacks: First, the nozzles are fixedly installed, and the gas-liquid mixture is only initially dispersed by pressure difference, resulting in insufficient mixing uniformity and uneven distribution of the effective components of ATMP. Second, it lacks a dedicated stirring mechanism, resulting in large liquid particle diameters and a wide distribution range, affecting subsequent mixing efficiency. Third, the gas-liquid transport path is simple, achieving mixing only through a single cavity without a graded processing structure, making it difficult to meet the fine requirements of ATMP processing. Fourth, the connection structure between the rotating and fixed components is poorly designed, easily leading to leakage or jamming, affecting the stability of the equipment.

[0004] To address the shortcomings of existing equipment, a rotary mixing device is needed that can perform graded processing of gas-liquid mixtures, achieve good fine refining effects, and operate stably, thereby improving the processing quality and efficiency of ATMP. Summary of the Invention

[0005] To address the shortcomings of existing aminotrimethylphosphonic acid mixing equipment, such as uneven mixing due to fixed nozzles, lack of a fine stirring mechanism, simple gas-liquid treatment path, and unreasonable connection structure, this utility model provides a rotary mixing device.

[0006] The rotary mixing device of this utility model is used for installation at the top of a mixing tank, and includes a rotating body and several nozzles. A rotary joint is coaxially mounted at the top center of the rotating body, and the top of the rotating body is connected to the inner wall of the mixing tank through a bearing assembly. The interior of the rotating body is provided with a premixing chamber, a transition section, and an acceleration chamber from top to bottom. The premixing chamber is provided with a spiral guide vane, the transition section has a conical structure, and the bottom of the acceleration chamber has connecting pipes evenly distributed around its circumference. Several nozzles are connected to the lower part of the rotating body around its circumference through connecting pipes, and the side wall of the rotating body is provided with mounting holes. Each nozzle includes a tube with an inner cavity, a built-in stirring mechanism inside the tube, and a nozzle at the end of the tube. High-pressure gas and liquid enter the premixing chamber through the rotary joint, are guided by the spiral guide vane, enter the acceleration chamber through the transition section, and then flow into the tube of the nozzle through the connecting pipes and are sprayed out by the nozzle.

[0007] Furthermore, the bearing assembly includes an upper radial bearing and a lower thrust bearing. The inner ring of the bearing is interference-fitted with the outer wall of the rotating body, and the outer ring is fixed to the inner wall of the mixing tank. The rotating end of the rotary joint is connected to the top of the rotating body through a flange, and a mechanical seal is provided at the connection. The mounting holes are evenly distributed circumferentially along the side wall of the rotating body.

[0008] Furthermore, the built-in stirring mechanism of the nozzle includes a mounting column, blades, and dispersing teeth. The two ends of the mounting column are fixed to the inner wall of the tube, and the blades are fixed to the mounting column and extend radially. The dispersing teeth are distributed along the length of the blades, divided into a middle region and an end region. The dispersing teeth in the end region are longer than those in the middle region and are tilted forward in the direction of rotation. The dispersing teeth of adjacent blades are circumferentially staggered, and guide ribs are provided in the tube between the stirring mechanism and the nozzle.

[0009] Furthermore, the nozzle body and the connecting pipe are connected by threads, and an O-ring is provided at the connection; the connecting pipe is welded and fixed to the acceleration chamber, and the number is the same as that of the nozzle; the spiral guide vanes in the premixing chamber spiral upward along the chamber wall.

[0010] Furthermore, the cone angle of the transition section is 60°-75°, and the diameter of the acceleration chamber is 1 / 2-2 / 3 of the diameter of the premixing chamber; the inner wall of the acceleration chamber is provided with hemispherical turbulence protrusions, which are evenly distributed circumferentially and spaced 5-8mm apart axially; a flow distribution plate is provided at the connection between the rotary joint of the rotating body and the premixing chamber, and the plate is provided with symmetrically distributed through holes.

[0011] Furthermore, the nozzle is a contraction-expansion type, with a cone angle of 15°-20° for the contraction section and 8°-12° for the expansion section, and a spiral groove on the inner wall; the nozzle end face is provided with a honeycomb-shaped array of regular hexagonal holes, and the hole walls and inlet / outlet edges are rounded; there are 4 nozzles, with an adjacent included angle of 90°, and the spray direction is at an angle of 15°-20° to the radial direction of the rotating body.

[0012] The design principle of this utility model is as follows: the circumferential movement of the nozzle is achieved by rotating the main body, thereby expanding the mixing range; a graded processing channel is formed by using the premixing chamber, transition section, and acceleration chamber, and the gas-liquid mixing effect is improved by combining the spiral guide vane and the turbulence protrusion; the built-in stirring mechanism of the nozzle cooperates with the contraction-expansion structure of the nozzle to achieve multi-stage refinement of liquid particles.

[0013] The advantages of this utility model are: 1. The rotary design expands the mixing coverage and solves the problem of uneven mixing with fixed nozzles; 2. The combination of the graded treatment channel and the stirring mechanism significantly improves the uniformity of gas-liquid mixing and the fineness of liquid; 3. The matching design of the rotary joint and bearing assembly ensures the sealing performance and operational stability under high pressure conditions; 4. The reasonable connection structure of each component facilitates installation and maintenance and is suitable for the large-scale production of fine chemical products such as ATMP. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 A 3D view of the nozzle; Figure 3 This is a front view of the nozzle.

[0016] In the figure, 1-pipe body, 2-mounting column, 3-blade, 4-dispersion tooth, 5-guide rib, 6-nozzle, 7-nozzle head, 8-acceleration chamber, 9-transition section, 10-premixing chamber, 11-rotating body, 12-spiral guide vane, 13-rotary joint, 14-mounting hole, 15-connecting pipe. Detailed Implementation

[0017] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0018] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0021] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0022] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0023] Example 1, such as Figures 1-3 As shown, the rotary mixing device of this embodiment has the following specific structure and assembly: This rotary mixing device comprises a rotating body 11 and four nozzles 7, which are installed as a whole on the top of the ATMP mixing tank. The rotating body 11 is a hollow cylindrical structure made of 304 stainless steel, with an outer diameter of 120mm and a total height of 350mm. The top center of the rotating body 11 is connected to a rotary joint 13 via a flange. The fixed end of the rotary joint 13 is equipped with an air interface and a raw material interface, which are respectively connected to a high-pressure air source of 0.8-1.8MPa and an ATMP liquid raw material source. The rotating end is connected to the premixing chamber 10 inside the rotating body 11, and a mechanical seal is installed at the connection to ensure high-pressure sealing.

[0024] The rotating body 11 is connected to the inner wall of the mixing tank via a bearing assembly. The bearing assembly includes an upper radial bearing and a lower thrust bearing. The inner ring of the bearing is interference-fitted with the outer wall of the rotating body 11, and the outer ring is fixed to the inner wall of the mixing tank by bolts. The bearing models are 6210 and 51110, ensuring that the radial runout of the rotating body 11 is ≤0.05mm. The side wall of the rotating body 11 has 6 mounting holes 14, evenly distributed circumferentially, with a hole diameter of 12mm, for auxiliary fixing of the outer ring of the bearing assembly.

[0025] The rotating main body 11 contains, from top to bottom, a premixing chamber 10, a transition section 9, and an acceleration chamber 8. The premixing chamber 10 has a height of 100mm and an inner diameter of 100mm. A spiral guide vane 12 is welded inside the chamber. The spiral guide vane 12 is 3mm thick, has a lead of 150mm (1.5 times the diameter of the premixing chamber 10), and a height of 67mm (2 / 3 of the height of the premixing chamber 10). The spiral direction is opposite to the rotation direction of the rotating main body 11. The transition section 9 is a conical structure with a height of 50mm and a cone angle of 65°. Its lower end connects to the acceleration chamber 8. The acceleration chamber 8 has a height of 80mm and an inner diameter of 50mm (1 / 2 the diameter of the premixing chamber 10). Hemispherical turbulence protrusions, each 2.5mm in diameter, are evenly distributed on its inner wall, with 6 protrusions per circumferential ring and an axial spacing of 6mm.

[0026] Four connecting pipes 15 are evenly distributed circumferentially at the bottom of the acceleration chamber 8. The connecting pipes 15 are made of stainless steel, with an outer diameter of 25 mm and a length of 30 mm. They are welded and fixed to the inner wall of the acceleration chamber 8, and their axis forms an 18° angle with the radial direction of the acceleration chamber 8. The other end of the connecting pipe 15 is connected to the tube body 1 of the nozzle 7 by a thread. A fluororubber O-ring (3 mm in cross-sectional diameter) is installed at the connection to achieve a seal.

[0027] The nozzle 7 includes a tube body 1, a mounting post 2, blades 3, dispersion teeth 4, guide ribs 5, and a nozzle 6. The tube body 1 is cylindrical, 120mm long, and 20mm in inner diameter. One end is threaded to connect to the connecting pipe 15, and the other end is threaded to the nozzle 6. The mounting post 2 is a stainless steel rod with a diameter of 8mm, connected to the inner wall of the tube body 1 at both ends via bearings, allowing free rotation. The blades 3 consist of three 2mm thick blades, evenly distributed circumferentially along the mounting post 2, and welded to it. Each blade is 80mm long. The dispersion teeth 4 are welded to the blades 3, radially divided into a central region (30%-70% of the length) and an end region (70%-100% of the length). The dispersion teeth 4 in the central region are 5mm long, and those in the end region are 8mm long. Both are tilted forward 35° in the direction of blade 3 rotation. The dispersion teeth 4 of adjacent blades 3 are staggered 75° circumferentially, and the outer side of the dispersion teeth 4 has a 1.2mm gap from the inner wall of the tube body 1.

[0028] Three guide ribs 5 are welded inside the tube body 1 between the blade 3 and the nozzle 6. The guide ribs 5 are 1 mm high and 0.6 mm thick, and are evenly distributed around the circumference of the tube body 1. The nozzle 6 has a contraction-expansion type structure. The contraction section is 20 mm long with a cone angle of 18°, and the expansion section is 15 mm long with a cone angle of 10°. The inner wall of the expansion section is provided with a spiral groove with a lead of 5 mm and a groove depth of 0.6 mm. The end face of the nozzle 6 is 2 mm thick and has a honeycomb-shaped hole with a hexagonal array, each with a side length of 1 mm. The hole wall roughness Ra≤0.8μm, and the hole wall and the inlet and outlet edges are provided with a radius of R0.2 mm.

[0029] A flow distribution plate is installed at the connection between the rotary joint 13 of the rotating body 11 and the premixing chamber 10. The plate is 3mm thick and 100mm in diameter, with 4 through holes of 15mm in diameter, symmetrically distributed along the circumference to ensure that the gas-liquid mixture enters the premixing chamber 10 evenly.

[0030] The assembly process of this embodiment is as follows: 1. Weld the spiral guide vane 12 to the inner wall of the premixing chamber 10, and weld the flow distribution plate to the top of the premixing chamber 10; 2. Weld the two ends of the transition section 9 to the premixing chamber 10 and the acceleration chamber 8 respectively to form the inner cavity structure of the rotating body 11; 3. Weld the connecting pipe 15 to the bottom of the acceleration chamber 8, and machine the mounting hole 14 on the side wall of the rotating body 11; 4. Press the bearing assembly onto the outer wall of the rotating body 11, connect the rotary joint 13 through the flange and install the mechanical seal; 5. Assemble the nozzle 7: weld the mounting column 2 to the blade 3, weld the dispersion tooth 4 to the blade 3, install the whole into the pipe body 1 and fix the bearing, weld the guide rib 5, and finally connect the nozzle 6; 6. Connect the nozzle 7 to the connecting pipe 15 through threads to complete the overall assembly.

[0031] In this embodiment, when the rotary mixing device is working, high-pressure air and ATMP liquid raw materials enter the premixing chamber 10 through the rotary joint 13. They are initially mixed under the action of the spiral guide vane 12, and after being accelerated by the transition section 9, they enter the acceleration chamber 8, where they are further mixed by the turbulence protrusions. The mixture enters the tube body 1 of the nozzle 7 through the connecting pipe 15, which drives the mounting column 2 to rotate the blades 3 and the dispersing teeth 4, thus shearing and refining the mixture. Finally, it is guided to the nozzle 6 by the guide rib 5, where it is finally refined through the contraction-expansion structure and honeycomb holes. At the same time, the jet reaction force of the nozzle 7 drives the rotating body 11 to rotate at a speed of 150 r / min, achieving uniform mixing in the mixing tank.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary mixing device for installation at the top of a mixing tank, characterized in that: The rotating body (11) includes a rotating joint (13) coaxially mounted at the top center of the rotating body (11), and the top of the rotating body (11) is connected to the inner wall of the mixing tank through a bearing assembly; the rotating body (11) is provided with a premixing chamber (10), a transition section (9), and an acceleration chamber (8) from top to bottom. The premixing chamber (10) is provided with a spiral guide vane (12), the transition section (9) is a conical structure, and the bottom of the acceleration chamber (8) has a circumferentially distributed connecting pipe (15); the lower part of the rotating body (11) is circumferentially open Several nozzles (7) are connected through a connecting pipe (15). The side wall of the rotating body (11) is provided with mounting holes (14). The nozzle (7) includes a tube (1) with an inner cavity. The tube (1) is provided with a built-in stirring mechanism. The end of the tube (1) is provided with a nozzle (6). The high-pressure gas and liquid enter the premixing chamber (10) through the rotary joint (13), and after being guided by the spiral guide plate (12), it enters the acceleration chamber (8) through the transition section (9), and then flows into the tube (1) of the nozzle (7) through the connecting pipe (15) and is sprayed out by the nozzle (6).

2. The rotary mixing device according to claim 1, characterized in that: The bearing assembly includes an upper radial bearing and a lower thrust bearing. The inner ring of the bearing is interference-fitted with the outer wall of the rotating body (11), and the outer ring is fixed to the inner wall of the mixing tank. The rotating end of the rotary joint (13) is connected to the top of the rotating body (11) through a flange, and a mechanical seal is provided at the connection. The mounting holes (14) are evenly distributed along the circumference of the side wall of the rotating body (11), and the number is 4-8.

3. The rotary mixing device according to claim 2, characterized in that: The built-in stirring mechanism of the nozzle (7) includes a mounting column (2), a blade (3) and a dispersing tooth (4). The two ends of the mounting column (2) are fixed to the inner wall of the tube body (1). The blade (3) is fixed to the mounting column (2) and extends radially. The dispersing tooth (4) is distributed along the length of the blade (3), divided into a middle region and an end region. The dispersing tooth (4) in the end region is longer than that in the middle region and tilts forward by 30°-45° in the direction of rotation. The dispersing teeth (4) of adjacent blades (3) are staggered circumferentially by 60°-90°. A guide rib (5) is provided in the tube body (1) between the stirring mechanism and the nozzle (6).

4. The rotary mixing device according to claim 3, characterized in that: The nozzle (7) is connected to the connecting pipe (15) by a thread, and an O-ring is provided at the connection. The connecting pipe (15) is welded and fixed to the acceleration chamber (8), and the number is the same as that of the nozzle (7). The spiral guide vane (12) in the premixing chamber (10) spirals up along the chamber wall, with a lead of 1.2-1.8 times the diameter of the premixing chamber (10) and a height of 2 / 3 of the height of the premixing chamber (10).

5. The rotary mixing device according to claim 4, characterized in that: The cone angle of the transition section (9) is 60°-75°, and the diameter of the acceleration chamber (8) is 1 / 2-2 / 3 of the diameter of the premixing chamber (10). The inner wall of the acceleration chamber (8) is provided with hemispherical turbulence protrusions with a diameter of 2-3 mm, which are evenly distributed in the circumference and have an axial spacing of 5-8 mm. The rotary joint (13) of the rotating body (11) is connected to the premixing chamber (10) with a flow distribution plate, and the plate is provided with symmetrically distributed through holes.

6. The rotary mixing device according to claim 5, characterized in that: The nozzle (6) is a contraction-expansion type, with a cone angle of 15°-20° for the contraction section and 8°-12° for the expansion section, and a spiral groove on the inner wall; the end face of the nozzle (6) is provided with a honeycomb-shaped array of regular hexagonal holes, and the hole wall and the inlet and outlet edges are rounded; the number of nozzles (7) is 4, with an adjacent included angle of 90°, and the spray direction is at an angle of 15°-20° to the radial direction of the rotating body (11).

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