An on-line static mixer for liquid materials of the vortex type

Abstract

Disclosed is a vortex liquid raw material online static mixer, wherein a pipe body extends along a central axis; a first raw material inlet is arranged at a top end of the pipe body and is collinear with the central axis; a second raw material inlet is arranged on a side wall of the pipe body and is perpendicular to the central axis; a first vortex flow pipe is arranged in the pipe body and is connected with the first raw material inlet; a second vortex flow pipe is arranged in the pipe body and is connected with the first vortex flow pipe and the second raw material inlet; a third vortex flow pipe is arranged in the pipe body and is connected with the second vortex flow pipe; a discharge port is arranged at a bottom end of the pipe body and is connected with the third vortex flow pipe; a first gradual change section is arranged at an upper end of an inner pipe wall, the first gradual change section has a first length and a first cross section in a longitudinal direction of the vortex flow pipe, the first cross section is gradually changed from a circular shape with a radius R to a blade shape while the first gradual change section is twisted by a first predetermined angle in the longitudinal direction, and a vortex flow section is connected with the first gradual change section.

Description

Technical Field

[0001] This invention relates to the field of liquid raw material mixing, and in particular to a vortex-type online static mixer for liquid raw materials. Background Technology

[0002] Mixing is a pretreatment step in many industrial production and food processing processes, and the quality of the mixing directly affects production efficiency and product quality. In liquid-liquid mixing applications, mixing devices can be divided into dynamic mixers and static mixers based on the presence or absence of moving parts. Static mixers have no external drive; they rely on the fluid's own energy flow impacting internal stationary elements, increasing the fluid's velocity gradient and turbulent kinetic energy to cut and mix the raw materials. Dynamic mixers, on the other hand, rely on their internal power elements to generate strong shearing and diversion capabilities and excellent mixing performance. Despite the difference in the presence or absence of power elements, the mixing principle of both static and dynamic mixers is to achieve good dispersion and thorough mixing of the fluids by creating fluid segmentation and eddy currents. In petrochemical, food processing, and other fields, mixers mostly operate under closed conditions. In these cases, mixing devices should not have external drive devices, and static mixers, which do not require moving parts, have certain advantages. Static mixers are pipeline-type devices, generally do not occupy much space, have a relatively simple internal structure, and typically have low energy consumption and low maintenance requirements. Currently common SK-type and SV-type static mixers use a single-channel, left- and right-twisting spiral blade assembly welded together to generate eddies. This structure is relatively complex, resulting in significant pressure loss. Furthermore, the embedded spiral blades complicate cleaning and maintenance, and pose a risk of clogging. To address this technical problem, this patent proposes an online pipeline mixer with lower energy consumption, self-cleaning function, and easy maintenance.

[0003] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a vortex-type online static mixer for liquid raw materials, enabling thorough online mixing of two or more raw materials during conveying, processing, and filling processes under continuous material addition. This ensures uniform mixing of the added liquid raw materials, guarantees product quality, and simultaneously reduces energy consumption and equipment maintenance costs. The objective of this invention is achieved through the following technical solution.

[0005] A vortex-type online static mixer for liquid feedstock includes,

[0006] The tube body extends along its central axis;

[0007] The first raw material inlet is located at the top of the pipe and is collinear with the central axis.

[0008] The second raw material inlet is located on the side wall of the pipe body and is perpendicular to the central axis;

[0009] A first vortex tube is disposed within the tube body and connected to the first raw material inlet;

[0010] The second vortex tube is disposed in the tube body and is connected to the first vortex tube and the second raw material inlet.

[0011] The third vortex tube is disposed inside the tube body and is connected to the second vortex tube;

[0012] The discharge port is located at the bottom end of the tube body and communicates with the third vortex tube; wherein, the first vortex tube, the second vortex tube, and the third vortex tube all include an inner tube wall located within the tube body, the inner tube wall comprising,

[0013] The first gradient section is located at the upper end of the inner tube wall. The first gradient section has a first length and a first cross-section in the longitudinal direction of the vortex tube. As the first gradient section twists in the longitudinal direction by a first predetermined angle, the first cross-section smoothly changes from a circle with a radius of R to a blade shape. The blade shape includes a square with a side length of 2r and semicircles with a radius of r extending on each side of the square. The cross-sectional area of ​​the first cross-section remains unchanged.

[0014] A vortex flow section, which connects to the first gradient section, has a second length and a second cross-section in the longitudinal direction of the vortex flow tube. The second cross-section is twisted by a second predetermined angle in the longitudinal direction as the vortex flow section twists. The second cross-section is the shape of the blade.

[0015] The second gradient section connects to the vortex flow section and is located at the lower end of the inner tube wall. The second gradient section has a third length and a third cross-section in the longitudinal direction of the vortex flow tube. The third cross-section smoothly changes from the blade shape to a circle with a radius of R as the second gradient section twists in the longitudinal direction by a third predetermined angle. The cross-sectional area of ​​the third cross-section remains unchanged. The cross-sectional areas of the first cross-section, the second cross-section, and the third cross-section are the same.

[0016] In the aforementioned vortex-type online static mixer for liquid raw materials, the second raw material inlet includes two inlet pipes located on opposite sides of the pipe body and no longer on the same horizontal plane.

[0017] In the aforementioned vortex-type online static mixer for liquid raw materials, the rotation direction of the first vortex tube is opposite to that of the second vortex tube, and the rotation direction of the third vortex tube is opposite to that of the second vortex tube.

[0018] In the aforementioned vortex-type online static mixer for liquid raw materials, the tube body between the first vortex tube and the second vortex tube is a premixing zone, the length of which is 1-120 times the diameter of the first vortex tube.

[0019] In the aforementioned vortex-type online static mixer for liquid raw materials, the tube between the third vortex tube and the second vortex tube is a straight tube, the length of which is 1-120 times the diameter of the second vortex tube.

[0020] In the aforementioned vortex-type online static mixer for liquid raw materials, at least one vortex tube with the opposite rotation direction is provided between the discharge port and the third vortex tube.

[0021] In the aforementioned vortex-type online static mixer for liquid raw materials, the blade shape is either 2-blade, 3-blade, 4-blade, 5-blade, or 6-blade.

[0022] In the aforementioned vortex-type online static mixer for liquid raw materials, the first predetermined angle is 90 degrees, the second predetermined angle is 180 degrees, and the third predetermined angle is 80 degrees.

[0023] In the aforementioned vortex-type online static mixer for liquid raw materials, the torsion angle of the first cross-section gradually changes based on the α transition curve, wherein, L represents the first length, and x represents the position coordinates of the first cross-section along the length direction. t and k are the two power-law variable coefficients of the α transition curve, which can adjust the shape of the transition curve. The optimal eddy current generation efficiency is achieved when 0.8 < t < 1.2 and 0.4 < k < 0.8.

[0024] In the aforementioned vortex-type online static mixer for liquid raw materials, the torsion angle of the first cross section and / or the torsion angle of the third cross section are based on the Wittsinski curve or a cosine function gradient.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention eliminates the need for embedded ribs, spiral blades, or other obstructive components, resulting in extremely low pressure drop and energy consumption, minimal energy expenditure, and high mass transfer efficiency. It features self-cleaning properties, reducing maintenance costs, and allows for continuous processing without interruption of the mixing process. The mixing distance and installation space are minimal, and the mixer itself is part of the pipeline, thus avoiding the drawbacks of traditional mixing tanks. With no moving parts, there is no wear and tear, resulting in virtually no maintenance costs. It is not prone to blockage, and its installation method and materials can be of any shape, size, and material. Forced mixing of the entire process material significantly reduces storage tank volume, potentially eliminating the need for storage tanks altogether.

[0027] The above description is merely an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and more understandable, so that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0028] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0029] In the attached diagram:

[0030] Figure 1 This is a schematic diagram of the structure of the vortex-type online static mixer for liquid raw materials of the present invention;

[0031] Figure 2 This is a schematic diagram of the arrangement of the second raw material inlet of the vortex-type online static mixer for liquid raw materials of the present invention;

[0032] Figure 3 This is a schematic diagram of the vortex flow formed by two streams of liquid at the second raw material inlet of the vortex-type online static mixer for liquid raw materials of the present invention;

[0033] Figure 4 This is a raw material volume content distribution diagram and a liquid raw material streamline trajectory diagram of an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0034] Figure 5 This is a schematic diagram of the raw material non-uniformity coefficient of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0035] Figure 6 This is a schematic diagram of the three-bladed structure of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0036] Figure 7 This is a schematic diagram of the four-bladed structure of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0037] Figure 8 This is a schematic diagram of the five-bladed structure of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0038] Figure 9 This is a schematic diagram of the vortex tube structure of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0039] Figure 10 This is a schematic diagram of the inner wall cross-section at a certain transition stage position in the gradient zone of an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0040] Figure 11 This is a schematic diagram of different gradual transition modes in one embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0041] Figure 12 This is a schematic diagram of the arrangement of the second raw material inlet in an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0042] Figure 13 This is a raw material volume content distribution diagram of an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0043] Figure 14 This is a schematic diagram of the raw material non-uniformity coefficient of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0044] Figure 15 This is a schematic diagram of the arrangement of the second raw material inlet in an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0045] Figure 16 This is a schematic diagram of the arrangement of the second raw material inlet in an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0046] Figure 17 This is a raw material volume content distribution diagram and a liquid raw material streamline trajectory diagram of an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0047] Figure 18 This is a schematic diagram of the raw material non-uniformity coefficient of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0048] Figure 19 This is a schematic diagram of the raw material non-uniformity coefficient of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0049] Figure 20 This is a raw material volume content distribution diagram and a liquid raw material streamline trajectory diagram of an embodiment of the vortex-type liquid raw material online static mixer of the present invention;

[0050] Figure 21 This is a schematic diagram of the raw material non-uniformity coefficient of an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention;

[0051] Figure 22 yes Figure 19 , Figure 1 and Figure 16 Comparison of raw material non-uniformity coefficients under three implementation methods;

[0052] Figure 23 This is a schematic diagram of the arrangement of the second raw material inlet in an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention, where the liquid contains particles.

[0053] Figure 24 This is a raw material volume content distribution diagram of an embodiment of the vortex-type liquid raw material online static mixer of the present invention, which contains particles in the liquid;

[0054] Figure 25 This is a schematic diagram of the raw material non-uniformity coefficient in an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention, which contains particles in the liquid.

[0055] Figure 26 This is a schematic diagram of the arrangement of the second raw material inlet in an embodiment of the vortex-type liquid raw material online static mixer of the present invention.

[0056] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0057] The following will refer to the attached diagram. Figures 1 to 26 Specific embodiments of the invention will be described in more detail below. While specific embodiments of the invention are shown in the accompanying drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0058] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments for carrying out the invention; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of the invention. The scope of protection of this invention is determined by the appended claims.

[0059] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings do not constitute a limitation on the embodiments of the present invention.

[0060] To better understand, such as Figures 1 to 26 As shown, an online static mixer for vortex-type liquid raw materials includes,

[0061] Pipe body 1, which extends along its central axis;

[0062] The first raw material inlet 2 is located at the top of the pipe body 1 and is collinear with the central axis;

[0063] The second raw material inlet 3 is located on the side wall of the pipe body 1 and is perpendicular to the central axis;

[0064] The first vortex tube 4 is disposed inside the tube body 1 and is connected to the first raw material inlet 2;

[0065] The second vortex tube 5 is disposed inside the tube body 1 and is connected to the first vortex tube 4 and the second raw material inlet 3.

[0066] The third vortex tube 6 is disposed inside the tube body 1 and is connected to the second vortex tube 5;

[0067] The discharge port is located at the bottom end of the pipe body 1 and is connected to the third vortex tube 6; wherein, the first vortex tube 4, the second vortex tube 5, and the third vortex tube 6 all include an inner tube wall located within the pipe body 1, the inner tube wall comprising,

[0068] The first gradient section 8 is located at the upper end of the inner tube wall. The first gradient section 8 has a first length and a first cross-section in the longitudinal direction of the vortex tube. As the first gradient section 8 twists in the longitudinal direction by a first predetermined angle, the first cross-section smoothly changes from a circle with a radius of R to a blade shape. The blade shape includes a square with a side length of 2r and semicircles with a radius of r extending on each side of the square. The cross-sectional area of ​​the first cross-section remains unchanged.

[0069] The vortex flow section 10 connects to the first gradient section 8. The vortex flow section 10 has a second length and a second cross-section in the longitudinal direction of the vortex flow tube. The second cross-section is twisted by a second predetermined angle in the longitudinal direction as the vortex flow section 10 twists. The second cross-section is the shape of the blade.

[0070] The second gradient section 9 connects to the vortex flow section 10 and is located at the lower end of the inner tube wall. The second gradient section 9 has a third length and a third cross-section in the longitudinal direction of the vortex flow tube. The third cross-section smoothly changes from the blade shape to a circle with a radius of R as the second gradient section 9 twists at a third predetermined angle in the longitudinal direction. The cross-sectional area of ​​the third cross-section remains unchanged. The cross-sectional areas of the first cross-section, the second cross-section, and the third cross-section are the same.

[0071] In a preferred embodiment of the vortex-type liquid raw material online static mixer, the second raw material inlet 3 includes two inlet pipes located on opposite sides of the pipe body 1 and no longer on the same horizontal plane.

[0072] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the rotation direction of the first vortex tube 4 is opposite to that of the second vortex tube 5, and the rotation direction of the third vortex tube 6 is opposite to that of the second vortex tube 5.

[0073] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the tube body 1 between the first vortex tube 4 and the second vortex tube 5 is a premixing zone 7, the length of which is 1-120 times the diameter of the first vortex tube 4.

[0074] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the tube 1 between the third vortex tube 6 and the second vortex tube 5 is a straight tube, the length of which is 1-120 times the diameter of the second vortex tube 5.

[0075] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, at least one vortex tube with the opposite rotation direction is provided between the discharge port and the third vortex tube 6.

[0076] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the blade shape is a 2-blade shape, a 3-blade shape, a 4-blade shape, a 5-blade shape, or a 6-blade shape.

[0077] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the first predetermined angle is 90 degrees, the second predetermined angle is 180 degrees, and the third predetermined angle is 80 degrees.

[0078] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the torsion angle of the first cross-section gradually changes based on the α transition curve, wherein, L represents the first length, and x represents the position coordinates of the first cross-section along the length direction. t and k are the two power-law variable coefficients of the α transition curve, which can adjust the shape of the transition curve. The optimal eddy current generation efficiency is achieved when 0.8 < t < 1.2 and 0.4 < k < 0.8.

[0079] In a preferred embodiment of the vortex-type online static mixer for liquid raw materials, the torsion angle of the first cross section and / or the torsion angle of the third cross section are based on the Wittsinski curve or a cosine function gradient.

[0080] In one embodiment, such as Figure 2As shown, the second raw material inlet 3 is arranged in a tangential inlet configuration, meaning one is located at the upper end and the other at the lower end. The two fluid streams enter vertically into the annular region between the inner and outer pipes, forming a vortex flow, as shown... Figure 3 As shown. The first liquid feedstock enters the mixer through the first feedstock inlet 2, and after passing through the first vortex tube 4, it is subjected to vortex action. When the first feedstock flows out of the mixer outlet, it has enhanced turbulent shear energy, which promotes dispersion in the downstream space. The second liquid feedstock enters through the second feedstock inlet 3, generating tangential velocity in a tangential inlet manner, forming a vortex flow in the annular region between the inner and outer tubes. Both the first and second liquid feedstocks are vortex flows when entering the premixing zone 7, exhibiting strong vortex shear action. The two liquids generate sufficient mutual shear action and mixing in the premixing zone 7. The rotation direction of the vortices of the first and second liquid feedstocks can be the same or opposite. However, the rotation direction of one of them should be opposite to the rotation direction of the vortex in the second vortex tube 5 to generate further reverse liquid cutting-position movement-remixing, enhancing the mixing. The length of the premixing zone 7 is preferably 0-120 times the diameter d of the first vortex tube 4, with an ideal length of 40-80d. The liquid raw materials passing through the premixing zone 7 already possess a vortex effect, and their non-uniformity has reached a low level. Upon entering the second vortex tube 5, vortices are generated again on top of the existing vortices, further promoting mixing.

[0081] A straight pipe section can be added after the second vortex tube 5 as needed to create a mixing zone, allowing the vortex flow to continue developing within the straight pipe section and further promoting mixing. This mixing zone can be 0-120 times the outer pipe diameter D, with an ideal length of 40-80D. A third vortex tube 6, with the vortex rotation direction opposite to that of the second vortex tube 5, can be added after the circular pipe section in the first mixing zone as needed. A second straight pipe section for the second mixing zone and a fourth vortex tube with the rotation direction opposite to that of the third vortex tube 6 can also be added after the second vortex tube 5 as needed. This process continues until the fully mixed liquid raw material flows out of the mixer from the discharge port.

[0082] The following is a preliminary CFD simulation of the mixer's effect. The first liquid feedstock is oil, with a density of 889 kg / m³ and a viscosity of 0.00332 kg / (ms), entering the mixer through the first feedstock inlet 2. The second liquid feedstock is water, with a density of 998.2 kg / m³ and a viscosity of 0.001003 kg / (ms), entering the mixer through the second feedstock inlet 3. The surface tension coefficient between oil and water is set to 0.15 N / m. After the calculation, the volumetric oil content distribution is as follows: Figure 4 As shown, red indicates an oil content of 100%, and blue indicates an oil content of 0, which means a water content of 100%. Figure 5 The data expresses the variation of the non-uniformity coefficient of the two liquids along the path from the outlet of the first vortex tube 4 to the discharge port. Currently, the most mature approach to quantifying the quality of mixing is based on the magnitude of the non-uniformity coefficient. Generally, a non-uniformity coefficient below 0.05 is considered well-mixed, and below 0.01 is considered completely mixed.

[0083] The non-uniformity coefficient ψ is defined as follows:

[0084]

[0085] Where σ represents the standard deviation of the mixed concentration distribution on the cross section, which is calculated from the mixed concentration at all points on the cross section, and the expression is as follows:

[0086]

[0087] The mean of the mixing concentration across the cross section:

[0088]

[0089] Figure 5 This indicates that the vortex flow of the first liquid raw material and the second liquid raw material fluid, generated by the tangential injection of the first vortex tube 4 and the second raw material inlet 3, produces strong dispersion, shearing, and mixing effects on the two liquids in the premixing zone 7, reducing the non-uniformity coefficient from 2.2 to about 0.05 within the premixing zone 7. After further mixing by the second vortex tube 5, the non-uniformity coefficient reaches 0.0012, achieving a completely mixed state.

[0090] In one embodiment, the first vortex tube 4, the second vortex tube 5, or the third vortex tube 6 in the mixer is composed of a first gradient section 8, a vortex section 10, and a second gradient section 9. The cross-sectional shape of the vortex section 10 can be a 2-blade, 3-blade, 4-blade, 5-blade, or 6-blade shape. A 3-, 4-, or 5-blade shape is preferred. Figure 6-8As shown. The vortex effect is greatest and the pressure loss is smallest when the cross-sectional shape has 4 blades, resulting in the highest energy efficiency ratio. Vortex flow section 10 is formed by rotating and stretching the cross-sectional shape counterclockwise or clockwise along the central axis. The ratio of its stretched length to the equivalent radius (i.e., pitch ratio) should be controlled between 1 and 16. The rotation angle should be between 90 and 720 degrees. The first gradient section 8's cross-section gradually changes from a circular shape to a blade shape along its length and rotates by a certain angle. Its logic ratio should be consistent with that of vortex flow section 10, and the rotation angle should be 360° / the number of blades n in the cross-section. The second gradient section 9's cross-section gradually changes from a blade shape to a circular shape along its length and rotates by a certain angle. Its logic ratio should be consistent with that of vortex flow section 10, and the rotation angle should be 360° / the number of blades n in the cross-section.

[0091] Since previous numerical simulations and experimental verifications have shown that the 4-blade cross-section has the optimal energy efficiency ratio, a preferred embodiment of the vortex tube with a 4-blade shape will be described below, such as... Figure 9 As shown. The first vortex tube 4, the second vortex tube 5, or the third vortex tube 6 includes an outer tube wall and an inner tube wall, wherein,

[0092] The inner tube wall includes,

[0093] The first gradient section 8 is located at the upper end of the inner tube wall. The first gradient section 8 has a first length and a first cross-section in the longitudinal direction of the vortex tube. As the first gradient section 8 twists in the longitudinal direction by a first predetermined angle, the first cross-section smoothly changes from a circle with a radius of R to a blade shape. The blade shape includes a square with a side length of 2r and semicircles with a radius of r extending on each side of the square. The cross-sectional area of ​​the first cross-section remains unchanged.

[0094] The vortex flow section 10 connects to the first gradient section 8. The vortex flow section 10 has a second length and a second cross-section in the longitudinal direction of the vortex flow tube. The second cross-section is twisted by a second predetermined angle in the longitudinal direction as the vortex flow section 10 twists. The second cross-section is the shape of the blade.

[0095] The second gradient section 9 connects to the vortex flow section 10 and is located at the lower end of the inner tube wall. The second gradient section 9 has a third length and a third cross-section in the longitudinal direction of the vortex flow tube. The third cross-section smoothly changes from the blade shape to a circle with a radius of R as the second gradient section 9 twists at a third predetermined angle in the longitudinal direction. The cross-sectional area of ​​the third cross-section remains unchanged. The cross-sectional areas of the first cross-section, the second cross-section, and the third cross-section are the same.

[0096] like Figure 10As shown, in the first and second transition sections 9, during the process of the inner wall cross-sectional shape of the pipe gradually changing from a circle to a blade-shaped cross-section, the cross-section rotates clockwise (+1) or counterclockwise (-1) by a certain preset angle along the axial direction. The angle rotated is 90 degrees. Where Rcs is the diameter of the circumscribed circle of the inner square after the transition. R is the diameter of the circumscribed circle of the inner square during the transition. rf is the radius of the blade-shaped sector after the transition, and r is the radius of the blade-shaped sector during the transition. A is the center of the blade-shaped sector. y is the distance from A to the center O of the circumscribed circle of the square. λ is the angle between the radius of the blade-shaped sector and the vertical side (FB) of the square. When the cross-section is circular, λ is 45°; when the cross-section is a complete blade shape, λ is 90°. As the angle λ gradually increases from 45° to 90°, a series of transition cross-sections can be formed. These cross-sections rotate clockwise (or counterclockwise) by a predetermined angle during the axial transition. Figure 11 As shown, if the spacing between sections changes uniformly during clockwise rotation along the axial direction, this transition is called a linear transition. To generate greater eddy current intensity and reduce friction loss, a smoother transition can be designed at the beginning and end of the transition section, i.e., a smaller angle of rotation per unit distance. Examples include an α-transition curve based on a cosine function, or the Vitosinski curve.

[0097] Preferably, in the vortex tube, the first length is equal to the third length, and the first length and / or the third length is half of the second length.

[0098] In the aforementioned vortex tube, the outer tube wall is a straight tube, and the radius R is from 0.01m to 100m.

[0099] In the vortex tube, the ratio of the first length or the third length to the second length is equal to the ratio of the first predetermined angle or the third predetermined angle to the second predetermined angle.

[0100] In the vortex tube, the first predetermined length is one-quarter of the vortex tube, the second predetermined length is one-half of the vortex tube, and the third predetermined length is one-quarter of the vortex tube.

[0101] In the aforementioned vortex flow tube, the vortex flow tube is connected to a pipe with a radius of R.

[0102] In the vortex tube, the first predetermined angle is 90 degrees, the second predetermined angle is 180 degrees, and the third predetermined angle is 90 degrees.

[0103] In the vortex tube, the sum of the first predetermined angle, the second predetermined angle, and the third predetermined angle is 360 degrees.

[0104] In the vortex tube, the ratio of the sum of the first length, the second length, and the third length to the radius R is 8:1.

[0105] The ratio of the sum of the first, second, and third lengths to the radius R is 8:1, which is based on the ratio of the vortex intensity generated by the vortex tube to the pressure loss it causes. That is, it generates the maximum vortex intensity with the minimum pressure loss. When applied to different processing systems, such as cleaning milk processing equipment, a smaller ratio (e.g., 6:1) can be used to produce a greater cleaning effect.

[0106] In addition to the typical implementation methods described above, a simpler method for introducing liquid raw materials is as follows: Figure 12 As shown. The following can be directly connected. Figure 1 The typical implementation includes a second vortex tube 5 and a first mixing zone. This implementation is relatively simple and suitable for mixing applications with low uniformity, such as a non-uniformity coefficient of around 0.05. The first liquid feedstock enters through a small circular tube; the second liquid feedstock enters through an annular inlet. A simulation diagram is shown below. Figure 13 As shown, the distribution of the non-uniformity coefficient is as follows: Figure 14 As shown.

[0107] Another simpler implementation method is Figure 15 As shown: the first type of liquid raw material enters through a horizontal circular pipe, and the second type of liquid raw material enters through a vertical circular pipe.

[0108] like Figure 16 As shown, in another inlet implementation, the first vortex tube 4, which extends deep into the mixer, can be moved to the outside. This allows the outlets of the first liquid raw material and the two outlets of the second liquid raw material in the mixer to converge in the same area, undergoing mutual shearing, splitting, repositioning, and re-merging. This allows the two liquids to mix earlier. In this implementation, the rotation direction of the vortex generated by the first raw material inlet 2 is consistent with the rotation direction of the vortex formed by the tangential inlet of the second raw material, and opposite to the rotation direction of the subsequent second vortex tube 5. CFD numerical simulations show that this liquid raw material inlet implementation produces a better mixing effect. Due to the extended length and effect of the premixing zone 7, near-complete mixing can be achieved within the premixing zone 7, with a non-uniformity coefficient close to 0.01. After passing through the second vortex tube 5, sufficient complete mixing can be achieved. The simulation diagram is shown below. Figure 17 As shown, the distribution of the non-uniformity coefficient is as follows: Figure 18 As shown.

[0109] Figure 19 This is a schematic diagram of the raw material non-uniformity coefficient in an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention. Figure 20This is a raw material volume content distribution diagram and a liquid raw material streamline trajectory diagram of an embodiment of the vortex-type liquid raw material online static mixer of the present invention. Figure 21 This is a schematic diagram of the raw material non-uniformity coefficient in an embodiment of the vortex-type online static mixer for liquid raw materials of the present invention. Figure 22 yes Figure 19 , Figure 1 and Figure 16 A comparison chart of raw material non-uniformity coefficients under three implementation methods. The chart demonstrates that the implementation method of the raw material inlet has a significant impact on the final mixing effect of the liquid raw materials. Compared to... Figure 19 Implementation method, Figure 1 In this implementation, a tangential inlet was applied to the second liquid raw material, increasing the vortex intensity and mixing effect of the premixing section. Figure 16 The illustrated implementation allows the two liquids to interact directly and mix upon entering the system, further improving the mixing effect in the premixing zone and resulting in a better final mixing effect. These comparisons demonstrate that the innovative design of the liquid feedstock entry system plays a crucial role in the efficiency of the static mixer.

[0110] The above-described embodiments of the present invention are also applicable to the mixing of liquid raw materials containing particles. When the particle diameter is very small, such as in the micrometer range, and the density is close to that of the raw material liquid, all of the above-described raw material inlet embodiments can achieve good mixing results. When the particles are larger, alternative methods can be adopted... Figure 23 The diagram illustrates feeding methods for liquid feedstock containing particles. The first and second types of particle-containing feedstock inlets can be arranged in parallel. For example... Figures 24 to 25 As shown, two different types of particles enter the pipeline in parallel. Before entering the vortex tube, mixing is minimal; however, mixing intensifies after entering the vortex tube. Using a method similar to the non-uniformity analysis of mixing different liquids, different cross-sections are taken along the pipeline axis in the numerical simulation. Each cross-section is divided into 100 cells, and the number of the first type of particle in each cell is obtained (100 data points). The standard deviation and mean of these 100 data points are calculated to obtain a distribution map of the non-mixing degree of this liquid along the pipeline flow direction. It is evident that the degree of particle mixing significantly increases after passing through the vortex tube. The monitored collision frequency of the two types of particles increases significantly after the liquid feedstock flows through the vortex tube, indicating a significant enhancement in the mixing of the two particulate-containing feedstocks.

[0111] Figure 26This is a schematic diagram of the arrangement of the second raw material inlet in one embodiment of the vortex-type online static mixer for liquid raw materials of the present invention. This embodiment is suitable for liquid raw materials that are difficult to mix. By adding a vortex tube at each of the inlets on both sides of the second liquid raw material, a certain degree of vortex shearing effect can be generated after the liquid raw material enters the mixer, promoting the mixing of the liquid. The basic principle of this application has been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. In addition, the specific details disclosed above are only for illustrative and facilitative purposes, and are not limitations. The above details do not limit the application to be implemented using the above specific details.

[0112] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A vortex-type online static mixer for liquid raw materials, characterized in that, It includes, The tube body extends along its central axis; The first raw material inlet is located at the top of the pipe and is collinear with the central axis. The second raw material inlet is located on the side wall of the pipe body and is perpendicular to the central axis; A first vortex tube is disposed within the tube body and connected to the first raw material inlet; The second vortex tube is disposed in the tube body and is connected to the first vortex tube and the second raw material inlet. The third vortex tube is disposed inside the tube body and is connected to the second vortex tube; The discharge port is located at the bottom end of the tube body and communicates with the third vortex tube; wherein, the first vortex tube, the second vortex tube, and the third vortex tube all include an inner tube wall located within the tube body, the inner tube wall comprising, The first gradient section is located at the upper end of the inner tube wall. The first gradient section has a first length and a first cross-section in the longitudinal direction of the vortex tube. As the first gradient section twists in the longitudinal direction by a first predetermined angle, the first cross-section smoothly changes from a circle with a radius of R to a blade shape. The blade shape includes a square with a side length of 2r and semicircles with a radius of r extending on each side of the square. The cross-sectional area of ​​the first cross-section remains unchanged. A vortex flow section, which connects to the first gradient section, has a second length and a second cross-section in the longitudinal direction of the vortex flow tube. The second cross-section is twisted by a second predetermined angle in the longitudinal direction as the vortex flow section twists. The second cross-section is the shape of the blade. The second gradient section connects to the vortex flow section and is located at the lower end of the inner tube wall. The second gradient section has a third length and a third cross-section in the longitudinal direction of the vortex flow tube. The third cross-section smoothly changes from the blade shape to a circle with a radius of R as the second gradient section twists in the longitudinal direction by a third predetermined angle. The cross-sectional area of ​​the third cross-section remains unchanged.

2. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, Preferably, the second raw material inlet includes two inlet pipes located on opposite sides of the pipe body and not on the same horizontal plane.

3. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The first vortex tube rotates in the opposite direction to the second vortex tube, and the third vortex tube rotates in the opposite direction to the second vortex tube.

4. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The tube body between the first vortex tube and the second vortex tube is a premixing zone, and its length is 1-120 times the diameter of the first vortex tube.

5. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The tube between the third vortex tube and the second vortex tube is a straight tube, and its length is 1-120 times the diameter of the second vortex tube.

6. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, At least one vortex tube with the opposite rotation direction is provided between the discharge port and the third vortex tube.

7. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The blade shape can be a 2-blade shape, a 3-blade shape, a 4-blade shape, a 5-blade shape, or a 6-blade shape.

8. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The first predetermined angle is 90 degrees, the second predetermined angle is 180 degrees, and the third predetermined angle is 80 degrees.

9. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The torsion angles of the first and / or third cross sections are gradually varied based on the α transition curve, where, L is the first length, x is the position coordinate of the first cross section in the length direction, and t and k are the coefficients of the two power-law variables of the α transition curve.

10. The vortex-type online static mixer for liquid raw materials as described in claim 1, wherein, The torsion angles of the first and / or third cross sections are based on the Wittsinski curve or a cosine function gradient.

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