Butterfly type stirring paddle and reactor

Abstract

The utility model provides a butterfly type stirring paddle and a reactor. The stirring paddle comprises a stirring shaft and a stirring shaft, the main paddle comprises at least one main paddle blade connected with the stirring shaft, a turbulent flow component is arranged on the main paddle blade, and the turbulent flow component is arranged to be capable of enhancing axial and radial flow mixing of fluid in the chemical container; the auxiliary paddle and the main paddle are coaxially arranged, the auxiliary paddle comprises at least one auxiliary paddle blade connected with the stirring shaft, and the auxiliary paddle blade is used for axially stirring fluid in the area below the main paddle blade; and the ratio of the distance from the lowest point of the joint of the main paddle blade and the stirring shaft to the lowest position of the chemical container to the distance from the lowest point of the joint of the auxiliary paddle blade and the stirring shaft to the lowest position of the chemical container is 0.25-0.65. The butterfly type stirring paddle is wide in applicable fluid viscosity range, the applicable fluid viscosity ranges from 0.001 Pa. S to 20 Pa. S, the fluid mixing efficiency can be remarkably improved, and therefore the power consumption of the stirring paddle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring paddles, in particular to a butterfly-type stirring paddle and a reactor. Background Art

[0002] Stirred reactors are widely used in industrial processes such as petroleum, chemical, pharmaceutical, energy, and metallurgy due to their good mass and heat transfer performance, controllable reaction conditions, flexible operation, and wide range of applications. The stirring paddle is a core component in the stirred reactor, and the structure of the stirring paddle is an important factor affecting the performance of the stirred reactor.

[0003] The traditional frame-anchor stirring paddle is suitable for high-viscosity materials and can only produce radial stirring effect, but the axial stirring effect is poor. In order to improve the poor axial stirring effect, the anchor blade is set at the bottom end of the frame blade, and multiple groups of inclined blades are installed in the internal cavity of the frame blade from top to bottom. A stirring shaft is set through the middle of each group of inclined blades. This structure improves the axial mixing of the slurry in the kettle to a certain extent; a central driving shaft and an auxiliary shaft can be arranged in the tank body, a transverse shaft can be arranged at the lower part of the driving shaft, a spiral blade can be arranged between the driving shaft and the auxiliary shaft, and an anchor stirring blade can be arranged at the bottom of the transverse shaft. The anchor stirring blade plays a role of radial mixing, and the spiral blade plays a role of axial mixing, thereby improving the mixing effect; a number of teeth can be equidistantly and detachably installed at the bottom end of the anchor stirring paddle, and inclined blade scrapers can be symmetrically provided on both sides of the lower end of the anchor stirring paddle. The tooth-type stirring blade can break up the material, improve the uniformity of heating the material, greatly reduce the agglomeration of the material, improve the drying and crushing efficiency of the evaporated solvent material, shorten the reaction time, and save costs; although the above improvements have improved the defects of the traditional frame anchor stirring paddle to a certain extent, they all have the problems of narrow viscosity application range, high stirring power consumption, unsatisfactory mixing effect, and more complex structure, which increases the manufacturing cost. Summary of the Invention

[0004] The present invention is designed to address the aforementioned technical issues. It provides a butterfly-type agitator and reactor that, to a certain extent, resolves or alleviates the technical issues of conventional frame-anchor agitators in the prior art, such as their narrow viscosity application range, high stirring power consumption, complex structure, and high manufacturing cost.

[0005] According to the first aspect of the utility model, the utility model provides a butterfly-type stirring paddle, which is used to stir the fluid in a chemical container, and the butterfly stirring paddle includes: a stirring shaft; a main paddle, the main paddle includes at least one main paddle blade connected to the stirring shaft, and the main paddle blade is provided with a flow-disturbing component, and the flow-disturbing component is configured to enhance the axial and radial flow mixing of the fluid in the chemical container; a secondary paddle, the secondary paddle is coaxially arranged with the main paddle, the secondary paddle includes at least one secondary paddle blade connected to the stirring shaft, and the secondary paddle blade is used to axially stir the fluid in the area below the main paddle blade; the ratio of the distance between the lowest point of the connection between the main paddle blade and the stirring shaft and the lowest point of the chemical container to the distance between the lowest point of the connection between the secondary paddle blade and the stirring shaft and the lowest point of the chemical container is 0.25-0.65.

[0006] In one possible implementation, the ratio of the radial diameter of the main propeller blade to the radial diameter of the auxiliary propeller blade is 0.5-1; wherein, the radial diameter refers to the horizontal distance from the connection point between the main propeller blade or the auxiliary propeller blade and the stirring shaft to the farthest end of the main propeller blade or the auxiliary propeller blade along the radial direction of the stirring shaft.

[0007] In one possible implementation, the main body of the main propeller blade is a plate-shaped structure, and the main body of the main propeller blade is arranged parallel to the stirring shaft; the spoiler component includes a first spoiler structure and a second spoiler structure, the first spoiler structure includes at least one spoiler channel, and a part of the main propeller blade on the side away from the stirring shaft is bent along the blade bending line to form the second spoiler structure.

[0008] In one possible implementation, there are multiple flow-turbine channels, and the multiple flow-turbine channels are all extended along the radial direction of the stirring shaft on the main propeller blade; preferably, the flow-turbine channels are wing-shaped or frame-shaped, and along the radial direction of the stirring shaft, the ratio of the length of the largest flow-turbine channel arranged in a frame shape to the length of the smallest flow-turbine channel is 0.1-1; and / or, at least one group of the flow-turbine channels arranged in a wing shape is arranged in a centrally symmetrical manner.

[0009] In one possible implementation, the ratio of the horizontal distance from the end of the blade bending line close to the bottom of the stirring shaft to the stirring shaft to the radial diameter of the main propeller blade is 0.2-0.75; and / or, along the axial direction of the stirring shaft, the ratio of the projection distance from the end of the blade bending line away from the bottom of the stirring shaft to the highest point of the main propeller blade on the stirring shaft to the axial diameter of the main propeller blade is 0.2-0.75; wherein, the radial propeller diameter refers to the horizontal distance from the connection point of the main propeller blade or the auxiliary propeller blade with the stirring shaft to the farthest end of the main propeller blade or the auxiliary propeller blade along the radial direction of the stirring shaft; the axial propeller diameter refers to the vertical distance between the two farthest end points of the main propeller blade along the axial direction of the stirring shaft; and / or, the bending angle of the second spoiler structure along the blade bending line is 5°-90°, and the bending arc of the second spoiler structure is 5°-90°.

[0010] In one possible implementation, the main body of the auxiliary propeller blade is plate-shaped, and the main body of the auxiliary propeller blade is arranged perpendicular to the stirring shaft; a third spoiler structure is provided on the auxiliary propeller blade, and the third spoiler structure is configured to enhance the fluid disturbance in the dead zone below the main propeller.

[0011] In one possible implementation, at least a portion of the contour line of the auxiliary propeller blade is arc-shaped, and at least a portion of the contour line of the auxiliary propeller blade is serrated, one end of the serrated contour line of the auxiliary propeller blade is connected to the stirring shaft, and the serrated contour line of the auxiliary propeller blade forms the third spoiler structure.

[0012] In one possible implementation, the contour line of the arc-shaped auxiliary propeller blade includes a first arc line and a second arc line, the first arc line is set along the shear direction of the auxiliary propeller blade, and the second arc line is set along the shear direction away from the auxiliary propeller blade, and the centers of the circles where the first arc line and the second arc line are located are located on the same side of the auxiliary propeller blade; and / or, the angle α of the tangent of the first arc line is greater than the angle β of the tangent of the second arc line; preferably, the angle α of the tangent of the first arc line is 15°-90°; the angle β of the tangent of the second arc line is 5°-60°.

[0013] In one possible implementation, the contour line of the serrated auxiliary propeller blade forms at least two teeth, and the ratio of the vertical distance from the convex point of the formed tooth to the stirring shaft to the vertical distance from the concave point of the formed tooth to the stirring shaft is 0.25-0.85; the horizontal angle γ of the serrated line of the formed tooth is 5°-85°.

[0014] According to a second aspect of the present invention, the present invention provides a reactor comprising the stirring paddle described above.

[0015] The utility model provides a butterfly-type stirring paddle and a reactor, the stirring paddle comprising: a stirring shaft; a main paddle, the main paddle comprising at least one main paddle blade connected to the stirring shaft, the main paddle blade being provided with a flow-disturbing member, the flow-disturbing member being configured to enhance axial and radial flow mixing of a fluid in a chemical container; an auxiliary paddle, the auxiliary paddle being coaxially arranged with the main paddle, the auxiliary paddle comprising at least one auxiliary paddle blade connected to the stirring shaft, the auxiliary paddle blade being configured to axially stir a fluid in an area below the main paddle blade; the ratio of the distance between the lowest point of the connection between the main paddle blade and the stirring shaft and the lowest point of the chemical container to the distance between the lowest point of the connection between the auxiliary paddle blade and the stirring shaft and the lowest point of the chemical container being 0.25-0.65. The butterfly-type stirring paddle is applicable to a wide range of fluid viscosities, such as 0.001-20 Pa·s, and can significantly improve liquid-liquid mixing efficiency, thereby reducing the power consumption of the stirring paddle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a front view of a butterfly-type stirring paddle provided by one embodiment of the present utility model;

[0017] Figure 2 The figure shows a front view of the main propeller of the butterfly-type stirring propeller provided in one embodiment of the present utility model;

[0018] Figure 3 The figure shows a top view of the main propeller of the butterfly-type stirring propeller provided in one embodiment of the present utility model;

[0019] Figure 4 The figure shows a top view of a butterfly-type stirring paddle provided by one embodiment of the present invention;

[0020] Figure 5 The figure shows a schematic structural diagram of the auxiliary blades of a butterfly-type agitator provided in one embodiment of the present invention;

[0021] Figure 6 Shown is a schematic diagram of the angle of the auxiliary propeller blade of a butterfly-type stirring impeller provided in one embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Stirring shaft;

[0024] 2. Main propeller; 21. Main propeller blade; 211. Upper contour line; 212. Lower contour line; 22. First spoiler structure; 221. First spoiler channel; 222. Second spoiler channel; 223. Third spoiler channel; 23. Second spoiler structure; 231. Blade bend; 232. Blade bend line;

[0025] 3. Auxiliary propeller; 31. Auxiliary propeller blade; 311. First circular arc line; 312. Second circular arc line; 313. Third spoiler structure. DETAILED DESCRIPTION

[0026] In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically limited. In the embodiments of this utility model, all directional indications (such as up, down, left, right, front, back, top, bottom, etc.) are used to explain the relative position relationship and movement of various components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, references to "embodiments" herein mean that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of such phrases in various locations in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. Those skilled in the art will readily appreciate that the embodiments described herein may be combined with other embodiments.

[0028] The present utility model provides a butterfly-type stirring paddle, which aims to solve or alleviate the technical problems of the conventional frame-anchor stirring paddle in the prior art when stirring materials, such as narrow viscosity application range, high stirring power consumption, complex structure, and high manufacturing cost. The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0029] Figure 1 Shown is a front view of a butterfly-type stirring paddle provided by one embodiment of the present utility model; Figure 2 The figure shows a front view of the main propeller of the butterfly-type stirring propeller provided in one embodiment of the present utility model; Figure 3 The figure shows a top view of the main propeller of the butterfly-type stirring propeller provided in one embodiment of the present utility model; Figure 4 FIG. 1 is a top view of a butterfly-type stirring blade provided by an embodiment of the present invention; FIG. Figure 1-4As shown, the butterfly-type stirring paddle is used to stir the fluid in the chemical container, including: a stirring shaft 1; a main paddle 2, the main paddle 2 includes at least one main paddle blade 21 connected to the stirring shaft 1, and the main paddle blade 21 is provided with a flow-disturbing component, which is configured to enhance the axial and radial flow mixing of the fluid in the chemical container; an auxiliary paddle 3, the auxiliary paddle 3 is coaxially arranged with the main paddle 2, and the auxiliary paddle 3 includes at least one auxiliary paddle blade 31 connected to the stirring shaft 1, and the auxiliary paddle blade 31 is used to axially stir the fluid in the area below the main paddle blade 21; the ratio of the distance between the lowest point of the connection between the main paddle blade 21 and the stirring shaft 1 and the lowest point of the chemical container to the distance between the lowest point of the connection between the auxiliary paddle blade 31 and the stirring shaft 1 and the lowest point of the chemical container is 0.25-0.65. It will be understood by those skilled in the art that the specific height of the connection between the main paddle 2 and the auxiliary paddle 3 and the stirring shaft 1 on the stirring shaft 1 is not restrictive, as long as the ratio of the distance between the lowest point of the connection between the main paddle blade 21 and the stirring shaft 1 and the lowest point of the chemical container to the distance between the lowest point of the connection between the auxiliary paddle blade 31 and the stirring shaft 1 and the lowest point of the chemical container is 0.25-0.65. The butterfly stirring paddle is applicable to fluids with a viscosity range of 0.001-20Pa·s, and can significantly improve the liquid-liquid mixing efficiency, thereby reducing the power consumption of the stirring paddle. The butterfly stirring paddle is applicable not only to low-viscosity systems, but also to high-viscosity systems. The main paddle blade 21 is applicable to chemical fluids with a viscosity range of 0.001-8Pa·s, and the main paddle blade 21 and the auxiliary paddle blade 31 are used in combination to be applicable to chemical fluids with a viscosity range of 0.001-20Pa·s.

[0030] It should be understood that the number of main propeller blades 21 is at least one, preferably 2-6, for example, it can be 2, 3, 4, 5, or 6. The number of main propeller blades 21 is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable. The number of main propeller blades 21 is more preferably 2. In this application, the specific number of main propeller blades 21 is not limited, as long as the main propeller blades 21 can stir the fluid in the chemical container in the radial and axial directions.

[0031] Similarly, the number of auxiliary propeller blades 31 is at least one, preferably 2-6, for example, 2, 3, 4, 5, 6. The number of auxiliary propeller blades 31 is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable. The number of auxiliary propeller blades 31 is more preferably 4. In this application, the specific number of auxiliary propeller blades 31 is not limited, as long as the auxiliary propeller blades 31 can stir the fluid in the axial direction. In addition, it should be noted that the main propeller blades 21 and the auxiliary propeller blades 31 can be evenly arranged along the circumference of the stirring shaft 1, or they can be unevenly arranged. Those skilled in the art can set them according to the actual situation of the fluid viscosity or the actual needs of the reaction. This is not restrictive.

[0032] It should also be understood that the ratio of the distance between the lowest point of the connection between the main propeller blade 21 and the stirring shaft 1 and the lowest point of the chemical container to the distance between the lowest point of the connection between the auxiliary propeller blade 31 and the stirring shaft 1 and the lowest point of the chemical container is 0.25-0.65. For example, the ratio can be 0.25 or 0.3 or 0.35 or 0.4 or 0.45 or 0.5 or 0.55 or 0.6 or 0.65. It is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable, as long as they are within the range of the ratio 0.25-0.65. The ratio is preferably 0.5.

[0033] In a possible implementation, the ratio of the radial diameter of the main propeller blade 21 to the radial diameter of the auxiliary propeller blade 31 is 0.5-1; wherein the radial diameter refers to the radial direction of the stirring shaft 1 ( Figures 1 to 4 The horizontal distance between the connection point between the main paddle blade 21 or the auxiliary paddle blade 31 and the stirring shaft 1 and the farthest end of the main paddle blade 21 or the auxiliary paddle blade 31 is shown in the left and right directions.

[0034] Specifically, the ratio of the radial diameter of the main propeller blade 21 to the radial diameter of the auxiliary propeller blade 31 is 0.5-1, for example, it can be 0.5 or 0.55 or 0.6 or 0.65 or 0.7 or 0.75 or 0.8 or 0.85 or 0.9 or 0.95 or 1, and is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable, as long as they are within the range of the ratio 0.5-1. The ratio is preferably 0.7;

[0035] In one possible implementation, the main body of the main paddle blade 21 is a plate-shaped structure, and the main body of the main paddle blade 21 is arranged parallel to the stirring shaft 1; the spoiler component includes a first spoiler structure 22 and a second spoiler structure 23, the first spoiler structure 22 includes at least one spoiler channel, and a part of the side of the main paddle blade 21 away from the stirring shaft 1 is bent along the blade bending line 232 to form a second spoiler structure 23.

[0036] Specifically, the main body of the main paddle blade 21 is a plate-shaped structure. When the angle between the upper contour line 211 of the main paddle blade 21 and the connection point of the stirring shaft 1 is an acute angle, the angle is 30°-89°; when the angle between the upper contour line 211 of the main paddle blade 21 and the connection point of the stirring shaft 1 is an obtuse angle, the angle range is 91°-150°; when the angle between the upper contour line 211 of the main paddle blade 21 and the connection point of the stirring shaft 1 is a right angle, the upper contour line 211 is perpendicular to the stirring shaft 1, and the upper contour line 211 of the main paddle blade 21 is perpendicular to the stirring shaft 1. The angle between the upper contour line 211 of the main propeller blade 21 and the stirring shaft 1 can play a role in regulating the gas-liquid free surface vortex, effectively reducing the gas-liquid free surface vortex, weakening the radial flow at the phase interface, strengthening the axial flow, and improving the mixing effect; different material viscosities and stirring speeds correspond to different angles. Different angles between the upper contour line 211 of the main propeller blade 21 and the stirring shaft 1 can be designed for different reaction systems. For example, the lower the viscosity of the material and the higher the stirring speed, the greater the Reynolds number in the reactor and the larger the angle.

[0037] Similarly, when the angle between the lower contour line 212 of the main paddle blade 21 and the stirring shaft 1 is an obtuse angle, the angle is 91°-150°; when the angle between the lower contour line 212 of the main paddle blade 21 and the stirring shaft 1 is an acute angle, the angle is 30-89°; when the angle between the lower contour line 212 of the main paddle blade 21 and the stirring shaft 1 is a right angle, the lower contour line 212 is arranged perpendicular to the stirring shaft 1, and the angle between the lower contour line 212 of the main paddle blade 21 and the stirring shaft can play a role in strengthening the flow and mixing of the fluid below the main paddle blade 21. The appropriate angle can be designed according to the viscosity of the material to be stirred, the stirring speed, and the shape of the bottom of the reactor shell; for example, the lower the viscosity of the material and the greater the stirring speed, the greater the Reynolds number in the reactor, and the larger the angle should be. The larger the angle, the more effectively the axial circulation of the fluid can be strengthened and the dead zone area below the main paddle blade 21 can be reduced.

[0038] In one possible implementation, a first flow-disturbing structure 22 is provided on the main propeller blade 21, and the first flow-disturbing structure 22 includes at least one flow-disturbing channel. As a preferred embodiment, there are multiple flow-disturbing channels, and the multiple flow-disturbing channels are all extended and opened on the main propeller blade 21 in the radial direction of the stirring shaft 1; preferably, the flow-disturbing channels are wing-shaped or frame-shaped, and along the radial direction of the stirring shaft 1, the ratio of the length of the largest flow-disturbing channel arranged in the frame shape to the length of the smallest flow-disturbing channel is 0.1-1; and / or, at least one group of the flow-disturbing channels arranged in the wing shape is arranged symmetrically with respect to the center.

[0039] Specifically, along the radial direction of the stirring shaft 1, the ratio of the length of the maximum flow disturbance channel arranged in a frame shape to the length of the minimum flow disturbance channel is 0.1-1, for example, it can be 0.1 or 0.2 or 0.3 or 0.4 or 0.5 or 0.6 or 0.7 or 0.8 or 0.9 or 1, and is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, as long as it is within the range of the ratio of 0.1-1. The ratio is preferably 0.3. The effects of the flow disturbance channel arranged in a frame shape and the flow disturbance channel arranged in a wing shape can enable the fluid to pass through the main propeller blades 21, thereby enhancing the radial flow velocity and circulation of the fluid.

[0040] More specifically, at least one group of the wing-shaped spoiler channels are centrally symmetrically arranged. At least one group of the wing-shaped spoiler channels can be adjacent to each other or separated from the frame-shaped spoiler channels. In the present application, the specific arrangement positions of the wing-shaped spoiler channels and the frame-shaped spoiler channels are not limited. As long as at least one group of the wing-shaped spoiler channels can be centrally symmetrical, the flow velocity of the fluid at the symmetrically arranged wing-shaped spoiler channels is higher, further enhancing the mixing effect of the fluid.

[0041] It should be understood that the number of rows of the frame-shaped spoiler holes is 1-6 rows, for example, it can be 1 row, 2 rows, 3 rows, 4 rows, 5 rows or 6 rows, but is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, as long as they are within the range of the number of rows. The number of rows of the frame-shaped spoiler holes is preferably 2 rows.

[0042] It should also be understood that a row of the spoiler holes arranged in a frame shape may include 1-5 spoiler holes, for example, 1, 2, 3, 4 or 5, and is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, as long as they are within the numerical range. The preferred number of spoiler holes is 2. In addition, the shape of the spoiler holes arranged in a frame shape may be a triangle, a quadrilateral or a polygon, preferably a polygon, and the ratio of the length of the maximum spoiler hole arranged in a frame shape to the length of the minimum spoiler hole is 0.1-1. Arranging frame-type spoiler holes of different lengths or the same length on the main propeller blade 21 can allow the fluid to pass through the main propeller blade 21, thereby enhancing the radial flow velocity and circulation of the fluid.

[0043] Among them, the spoiler holes can all be spoiler holes arranged in a wing shape, or all be spoiler holes arranged in a frame shape, or a combination of spoiler holes arranged in a wing shape and spoiler holes arranged in a frame shape; in the combination of spoiler holes, two groups of spoiler holes arranged in a wing shape and one group of spoiler holes arranged in a frame shape can be set, or two groups of spoiler holes arranged in a frame shape and one group of spoiler holes arranged in a wing shape can be set. In this combination, the two groups of spoiler holes arranged in a wing shape can be adjacent to each other, or can be separated from the spoiler holes arranged in a frame shape. In the combination method, the two groups of frame-shaped spoiler holes can be arranged adjacent to each other, or they can be separated from the wing-shaped spoiler holes. The preferred setting of the spoiler holes is: two groups of wing-shaped spoiler holes and one group of frame-shaped spoiler holes. The frame-shaped spoiler holes are arranged in the middle position of the two groups of wing-shaped spoiler holes. The two groups of wing-shaped spoiler holes are symmetrically arranged with the frame-shaped spoiler holes. The combination of the spoiler holes can not only enable the fluid to pass through the main propeller blades 21, enhance the radial flow velocity and circulation of the fluid, but also further enhance the mixing effect of the fluid.

[0044] In one possible implementation, the ratio of the horizontal distance from the end of the blade bending line 232 close to the bottom of the stirring shaft 1 to the stirring shaft 1 to the radial diameter of the main propeller blade 21 is 0.2-0.75; and / or, along the axial direction of the stirring shaft 1, the ratio of the projected distance from the end of the blade bending line 232 away from the bottom of the stirring shaft 1 to the highest point of the main propeller blade 21 on the stirring shaft 1 to the axial diameter of the main propeller blade 21 is 0.2-0.75; wherein the radial diameter refers to the horizontal distance from the connection point of the main propeller blade 21 or the auxiliary propeller blade 31 with the stirring shaft 1 to the farthest end of the main propeller blade 21 or the auxiliary propeller blade 31 along the radial direction of the stirring shaft 1; the axial diameter refers to the distance along the axial direction of the stirring shaft 1 ( Figure 1 and 2 In the up and down direction), the vertical distance between the two farthest end points of the main propeller blade 21; and / or, the bending angle of the second spoiler structure 23 along the blade bending line 232 is 5°-90°, and the bending arc of the second spoiler structure 23 is 5°-90°.

[0045] In this implementation, the bending angle of the second spoiler structure 23 along the blade bending line 232 is 5°-90°, for example, it can be 5°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° or 90°, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable. The bending angle of the second spoiler structure 23 along the blade bending line 232 is preferably 30°; the bending radian of the second spoiler structure 23 along the blade bending line 232 is 5°-90°, for example, it can be 5°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° or 90°, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable. The bending radian of the second spoiler structure 23 along the blade bending line 232 is preferably 60°.

[0046] Specifically, the function of the second spoiler structure 23 is to enhance the axial circulation and turbulence intensity, and improve the mixing effect of the fluid; by bending the second spoiler structure 23 at a certain angle, the flow velocity and turbulent kinetic energy under the agitator can be enhanced, and the axial mixing effect can also be enhanced, so that the fluid at the bottom of the main propeller blade 21 has no obvious stratification and "climbing" phenomenon; the bending of the second spoiler structure 23 can be bent upward or downward, and the upward bending or downward bending is achieved by sheet metal. Bending upward refers to the second spoiler structure 23 bending along the positive direction of the Z axis of the three-dimensional coordinate system, and bending downward refers to the second spoiler structure 23 bending along the opposite direction of the Z axis of the three-dimensional coordinate system. Bending upward is suitable for liquid-liquid, gas-liquid, and liquid-solid (solid density is greater than liquid density) systems, and bending downward is suitable for liquid-solid (solid density is less than liquid density) systems.

[0047] As an embodiment of the present application, the fluid viscosity range is 0.001-8Pa·s, and two main paddle blades 21 are symmetrically arranged on the stirring shaft 1. The angle between the upper contour line 211 of the main paddle blade 21 and the connection point of the stirring shaft 1 is set to 105°, and the angle between the lower contour line 212 of the main paddle blade 21 and the connection point of the stirring shaft 1 is set to 105°. The first spoiler channel 221 and the third spoiler channel 223 of the first spoiler structure 22 are set as airfoil spoiler channels, the second spoiler channel 222 is set as a frame-shaped spoiler channel, the first spoiler channel 221 and the third spoiler channel 223 are symmetrically arranged, the frame-type spoiler channels are set to 2 rows, 2 frame-type channels in a row, the diameter ratio of the minimum channel to the maximum channel of the frame-type spoiler channel is set to 0.3, and the second spoiler structure 23 is arranged along the blade The bending line 232 bends upward, with a bending angle of 30° and a bending arc of 47°. The ratio of the horizontal distance from the end of the blade bending line 232 close to the bottom of the stirring shaft 1 to the stirring shaft 1 to the radial paddle diameter of the main paddle blade 21 is 0.5, and the ratio of the projection distance from the end of the blade bending line 232 away from the bottom of the stirring shaft 1 to the highest point of the main paddle blade 21 on the stirring shaft 1 to the axial paddle diameter of the main paddle blade 21 is 0.5; the ratio of the paddle diameter of the main paddle blade 21 to the diameter of the reactor is 0.85, the diameter of the stirred reactor is 100 mm, the distance from the bottom end of the main paddle blade 21 to the bottom of the reactor is 5 mm, the stirring speed is set to 300 rpm, the operating temperature is room temperature, the pressure is normal pressure, the stirring medium is oil and water, and the densities of oil and water are 780 kg / m 3 , 1000kg / m 3 The viscosity of oil and water is 0.5 Pa·s and 0.001 Pa·s respectively, the liquid level is 120 mm, and the oil-water volume ratio is 1.532. ANSYS FLUENT and the Euler-Euler model are used to numerically simulate the above system. The calculated oil-water mixing uniformity is 0.736, and the power consumption per unit volume is 1.04 kW / m 3 , the global volume average shear rate is 26.57s -1 .

[0048] Figure 4 The figure shows a top view of a butterfly-type stirring paddle provided by one embodiment of the present invention; Figure 5 The figure shows a schematic structural diagram of the auxiliary blades of a butterfly-type agitator provided in one embodiment of the present invention; Figure 6 The figure shows the angle of the auxiliary blade of the butterfly-type impeller provided by one embodiment of the present invention. Figure 4-6As shown, the main body of the secondary paddle blade 31 is plate-shaped and is arranged perpendicular to the stirring shaft 1. The secondary paddle blade 31 is provided with a third flow-disturbing structure 313, which is configured to enhance the fluid disturbance in the dead zone below the main paddle 2. By providing the secondary paddle blade 31 below the main paddle blade 21 and providing the third flow-disturbing structure 313 on the secondary paddle blade 31, the dead zone area below the main paddle blade 21 can be further reduced, thereby promoting uniform mixing of the fluid in the reactor.

[0049] In one possible implementation, at least a portion of the contour line of the secondary propeller blade 31 is arc-shaped, and at least a portion of the contour line of the secondary propeller blade 31 is serrated, one end of the serrated contour line of the secondary propeller blade 31 is connected to the stirring shaft 1, and the serrated contour line of the secondary propeller blade 31 forms a third spoiler structure 313, which can promote uniform mixing of the fluid in the dead area below the main propeller blade 21.

[0050] In one possible implementation, the contour line of the arc-shaped auxiliary propeller blade 31 includes a first arc line 311 and a second arc line 312, the first arc line 311 is set along the shear direction of the auxiliary propeller blade 31, and the second arc line 312 is set along the shear direction away from the auxiliary propeller blade 31, and the center of the circle where the first arc line 311 and the second arc line 312 are located is located on the same side of the auxiliary propeller blade 31; and / or, the angle α of the tangent of the first arc line 311 is greater than the angle β of the tangent of the second arc line 312; preferably, the angle α of the tangent of the first arc line 311 is 15°-90°; the angle β of the tangent of the second arc line 312 is 5°-60°, and more preferably, the angle α of the tangent of the first arc line 311 is 60°; the angle β of the tangent of the second arc line 312 is 30°. The setting of this angle can increase the shear force on the fluid and improve the mixing effect.

[0051] In one possible implementation, the contour line of the serrated auxiliary propeller blade 31 forms at least two teeth, and the ratio of the vertical distance from the convex point of the formed tooth to the stirring shaft 1 to the vertical distance from the concave point of the formed tooth to the stirring shaft 1 is 0.25-0.85; the horizontal angle γ of the serrated line of the formed tooth is 5°-85°. Preferably, the horizontal angle γ of the serrated line of the formed tooth is 45°; similarly, the design of this angle can increase the shear force on the fluid and better improve the mixing effect. It should be noted that when the contour line of the auxiliary propeller blade 31 forms a plurality of serrations, the inclination angles of the serrated lines of the plurality of serrations can be the same or different, and the sizes of the serrations can be the same or different, which can be set by those skilled in the art according to actual conditions.

[0052] Specifically, the horizontal distance between one end of the first arc line 311 of the auxiliary paddle blade 31 and one end of the contour line of the serrated auxiliary paddle blade 31 is B, and the value of B can connect all the auxiliary paddle blades 31 to the stirring shaft 1, and the connection parts of the multiple auxiliary paddle blades 31 and the stirring shaft 1 do not overlap, that is, the auxiliary paddle blades 31 are evenly connected to the stirring shaft 1, so as to fully mix the fluid at the bottom of the reactor; more specifically, the ratio of the distance h between the protruding point of the tooth near one end of the stirring shaft 1 and the bottom end of the auxiliary paddle blade 31 to the distance H between the end of the second arc line 312 near the stirring shaft 1 and the bottom end of the auxiliary paddle blade 31 is 0.25-0.85. The ratio may be 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85 or 0.9, not limited to the listed values, other values ​​not listed within the numerical range are also applicable, and the ratio is preferably 0.63; the ratio of the propeller diameter of the auxiliary propeller to the propeller diameter of the main propeller is 0.5-1, and the ratio may be 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95 or 1, not limited to the listed values, other values ​​not listed within the numerical range are also applicable, and the ratio is preferably 0.7;

[0053] As another embodiment of the present application, the fluid viscosity range is 0.001-20 Pa·s, and two main paddle blades 21 are symmetrically arranged on the stirring shaft 1. The angle between the upper contour line 211 of the main paddle blade 21 and the connection point of the stirring shaft 1 is set to 105°, and the angle between the lower contour line 212 of the main paddle blade 21 and the connection point of the stirring shaft 1 is set to 105°. The first spoiler channel 221 and the third spoiler channel 223 of the first spoiler structure 22 are set as airfoil spoiler channels, the second spoiler channel 222 is set as a frame-shaped spoiler channel, the first spoiler channel 221 and the third spoiler channel 223 are symmetrically arranged, and the frame-type spoiler channel is set to 2 rows. There are two frame-type channels in a row, and the diameter ratio of the smallest channel to the largest channel of the frame-type spoiler channel is set to 0.3. The second spoiler structure 23 is bent upward along the blade bending line 232, with a bending angle of 30° and a bending arc of 47°. The ratio of the horizontal distance from the end of the blade bending line 232 close to the bottom of the stirring shaft 1 to the stirring shaft 1 to the radial diameter of the main propeller blade 21 is 0.5, and the ratio of the projected distance from the end of the blade bending line 232 away from the bottom of the stirring shaft 1 to the highest point of the main propeller blade 21 on the stirring shaft 1 to the axial diameter of the main propeller blade 21 is 0.5; the ratio of the propeller diameter of the main propeller blade 21 to the diameter of the reactor is 0.85.

[0054] The number of auxiliary paddle blades 31 is set to 4, the angle α of the tangent of the first arc line 311 is 60°, the angle β of the tangent of the second arc line 312 is 30°, the contour line of the serrated auxiliary paddle blade 31 forms at least two teeth, the horizontal angle γ of the serrated line of the formed teeth is 45°, the ratio of the distance h between the protruding point of the tooth near the end of the stirring shaft 1 and the bottom end of the auxiliary paddle blade 31 to the distance H between the end of the second arc line 312 near the stirring shaft 1 and the bottom end of the auxiliary paddle blade 31 is 0.6, and the auxiliary paddle 3 The ratio of the paddle diameter to the paddle diameter of the main paddle 2 is 0.7, the ratio of the distance between the lowest point of the connection between the main paddle blade 21 and the stirring shaft 1 and the lowest point of the chemical container to the distance between the lowest point of the connection between the auxiliary paddle blade 31 and the stirring shaft 1 and the lowest point of the chemical container is 0.5; the diameter of the flat-bottom reactor is 100 mm, the distance between the lowest end of the stirring paddle and the bottom of the reactor is 5 mm, the stirring speed is 300 rpm, the operating temperature is room temperature, the pressure is normal pressure, the stirring medium is oil and water, and the densities of oil and water are 780 kg / m 3 , 1000kg / m 3 , viscosities are 0.5 Pa·s and 0.001 Pa·s, respectively, the liquid level is 120 mm, and the oil-water volume ratio is 1.532. ANSYS FLUENT and the Euler-Euler model are used to numerically simulate the above system. The calculated oil-water mixing uniformity is 0.714, and the power consumption per unit volume is 0.987 kW / m 3 , the global volume average shear rate is 29.422s -1 .

[0055] In addition, the utility model also provides a reactor, which includes a butterfly stirring paddle, and the ratio of the diameter of the main paddle blade 21 of the butterfly stirring paddle to the diameter of the reactor is 0.33-0.85, for example, it can be 0.33, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8 or 0.85, and is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable. The ratio is preferably 0.85. The reactor drives the main paddle 2 to stir the fluid with a viscosity range of 0.001-8 Pa·s and the stirring medium is oil and water through the stirring shaft 1. The oil-water mixing uniformity after stirring is 0.736, and the power consumption per unit volume is 1.04 kW / m 3 , the global volume average shear rate is 26.57s -1 The reactor drives the main paddle 2 and the auxiliary paddle 3 through the stirring shaft 1 to stir the fluid with a viscosity range of 0.001-20Pa·s, and the stirring medium is oil and water. The uniformity of the oil-water mixture after stirring is 0.714, and the power consumption per unit volume is 0.987kW / m 3 , the global volume average shear rate is 29.422s -1Therefore, the butterfly-type stirring paddle is suitable for a wide range of fluid viscosities, has low stirring power consumption and a simple structure.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A butterfly-type stirring paddle, which is used to stir the fluid in a chemical container, characterized in that: include: Agitator shaft (1); A main paddle (2), the main paddle (2) comprising at least one main paddle blade (21) connected to the stirring shaft (1), the main paddle blade (21) being provided with a flow-disturbing member, the flow-disturbing member being configured to enhance the flow and mixing of the fluid in the chemical container in the axial and radial directions; A secondary propeller (3), the secondary propeller (3) being coaxially arranged with the main propeller (2), the secondary propeller (3) comprising at least one secondary propeller blade (31) connected to the stirring shaft (1), the secondary propeller blade (31) being used for axially stirring the fluid in the area below the main propeller blade (21); The ratio of the distance between the lowest point of the connection between the main paddle blade (21) and the stirring shaft (1) and the lowest point of the chemical container to the distance between the lowest point of the connection between the auxiliary paddle blade (31) and the stirring shaft (1) and the lowest point of the chemical container is 0.25-0.

65.

2. The butterfly-type stirring paddle according to claim 1, characterized in that: The ratio of the radial diameter of the main propeller blade (21) to the radial diameter of the auxiliary propeller blade (31) is 0.5-1; The radial paddle diameter refers to the horizontal distance from the connection point of the main paddle blade (21) or the auxiliary paddle blade (31) to the stirring shaft (1) to the farthest end of the main paddle blade (21) or the auxiliary paddle blade (31) along the radial direction of the stirring shaft (1).

3. The butterfly-type stirring paddle according to claim 1, characterized in that: The main body of the main paddle blade (21) is a plate-shaped structure, and the main body of the main paddle blade (21) is arranged parallel to the stirring shaft (1); The flow-disturbing component comprises a first flow-disturbing structure (22) and a second flow-disturbing structure (23), wherein the first flow-disturbing structure (22) comprises at least one flow-disturbing channel, and a portion of the main paddle blade (21) on a side away from the stirring shaft (1) is bent along a blade bending line (232) to form the second flow-disturbing structure (23).

4. The butterfly-type stirring paddle according to claim 3, characterized in that: There are a plurality of flow-turbulating channels, and the plurality of flow-turbulating channels are all extended and opened on the main paddle blade (21) along the radial direction of the stirring shaft (1); The flow disturbance channels are wing-shaped or frame-shaped, and along the radial direction of the stirring shaft (1), the ratio of the length of the largest flow disturbance channel arranged in the frame shape to the length of the smallest flow disturbance channel is 0.1-1; and / or, at least one group of the flow disturbance channels arranged in the wing shape is arranged in a centrally symmetrical manner.

5. The butterfly-type stirring paddle according to claim 3, characterized in that: The ratio of the horizontal distance between the end of the blade bending line (232) close to the bottom of the stirring shaft (1) and the stirring shaft (1) to the radial diameter of the main paddle blade (21) is 0.2-0.75; And / or, along the axial direction of the stirring shaft (1), the ratio of the projected distance between the end of the blade bending line (232) away from the bottom of the stirring shaft (1) and the highest point of the main paddle blade (21) on the stirring shaft (1) to the axial paddle diameter of the main paddle blade (21) is 0.2-0.75; Wherein, the radial paddle diameter refers to the horizontal distance from the connection point of the main paddle blade (21) or the auxiliary paddle blade (31) to the stirring shaft (1) in the radial direction of the stirring shaft (1) to the farthest end of the main paddle blade (21) or the auxiliary paddle blade (31); the axial paddle diameter refers to the vertical distance between the two farthest end points of the main paddle blade (21) in the axial direction of the stirring shaft (1); And / or, the bending angle of the second spoiler structure (23) along the blade bending line (232) is 5°-90°, and the bending arc of the second spoiler structure (23) is 5°-90°.

6. The butterfly-type stirring impeller according to any one of claims 1 to 5, characterized in that: The main body of the auxiliary paddle blade (31) is plate-shaped, and the main body of the auxiliary paddle blade (31) is arranged perpendicular to the stirring shaft (1); A third flow-disturbing structure (313) is provided on the auxiliary propeller blade (31), and the third flow-disturbing structure (313) is configured to enhance the fluid disturbance in the dead zone below the main propeller (2).

7. The butterfly-type stirring paddle according to claim 6, characterized in that: At least a portion of the contour line of the auxiliary propeller blade (31) is in an arc shape, and at least a portion of the contour line of the auxiliary propeller blade (31) is in a sawtooth shape, One end of the sawtooth-shaped outline of the auxiliary paddle blade (31) is connected to the stirring shaft (1), and the sawtooth-shaped outline of the auxiliary paddle blade (31) forms the third spoiler structure (313).

8. The butterfly-type stirring paddle according to claim 7, characterized in that: The contour line of the arc-shaped auxiliary propeller blade (31) includes a first arc line (311) and a second arc line (312). The first circular arc line (311) is arranged along the shearing direction of the auxiliary propeller blade (31), the second circular arc line (312) is arranged along the shearing direction away from the auxiliary propeller blade (31), and the centers of the circles where the first circular arc line (311) and the second circular arc line (312) are located are located on the same side of the auxiliary propeller blade (31); And / or, the angle α of the tangent of the first circular arc line (311) is greater than the angle β of the tangent of the second circular arc line (312); the angle α of the tangent of the first circular arc line (311) is 15°-90°; the angle β of the tangent of the second circular arc line (312) is 5°-60°.

9. The butterfly-type stirring impeller according to claim 7, characterized in that: The contour line of the sawtooth-shaped auxiliary paddle blade (31) forms at least two teeth, and the ratio of the vertical distance from the convex point of the formed tooth to the stirring shaft (1) to the vertical distance from the concave point of the formed tooth to the stirring shaft (1) is 0.25-0.85; the horizontal angle γ of the sawtooth line of the formed tooth is 5°-85°.

10. A reactor, characterized in that The invention comprises the butterfly-type stirring paddle according to any one of claims 1 to 9.

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