A butterfly type static mixer

Abstract

A butterfly-type static mixer relates to the field of petrochemical industry. The present invention provides a guide plate (3) on a housing (2), and guide vanes on the guide plate. A main fluid (4) forms a vortex flow after passing through the guide vanes. At the same time, a mixed fluid (5) enters a position close to the guide vanes through a mixed medium inlet pipe (1). The mixed fluid changes its flow direction through the guide vanes, so that the mixed fluid forms a predetermined angle with the main fluid and shears, and turbulence is enhanced, thereby enhancing the mixing effect. Compared with a traditional mixer, the present invention is much shorter in length and is not easy to be blocked. Due to the shortened length, the resistance loss along the way is reduced, thereby fully utilizing the pressure energy of the fluid to enable efficient mixing of the two-phase flow. The present invention has a small overall pressure drop, a good mixing effect, a simple overall structure, a long service life, and a low cost. Therefore, the present invention is suitable for occasions where mixing is required in various industries.

Description

Technical Field

[0001] The invention relates to the field of petrochemical industry, in particular to a mixer, and specifically to a butterfly type static mixer. Background Art

[0002] As is known, a mixer is an advanced, high-performance, low-operation and maintenance cost, and durable mixing equipment unit. Due to the above characteristics, it has been widely used in mixing, emulsification, reaction, and heat transfer. Compared with stirring type mixing equipment, the existing mixer has no mechanical moving parts and does not rely on a rotating stirring structure to mix multiphase fluids. Instead, it uses an optimized design structure unit to generate eddy currents and turbulence when the fluid passes through the mixing unit, so that the multiphase fluid can achieve the purpose of efficient mixing of the two-phase flow during the rotation and turbulence process. Since there are no moving parts, energy consumption is also saved.

[0003] The mixing unit of an existing mixer is generally composed of multiple groups of guide plates that are not parallel to the axis. After the multiphase fluid enters the same upstream pipeline at the same time, it enters the mixing unit. When passing through the mixing unit, it sometimes rotates left and sometimes rotates right, constantly changing the flow direction, not only pushing the middle fluid of the parallel flowing fluid in an ideal state to the periphery, but also pushing the peripheral fluid to the middle, thereby achieving a good mixing effect.

[0004] Existing mixers can be used for mixing liquid-liquid, liquid-gas, liquid-solid, gas-gas and other state media, and have good effects for fluids in different viscosity ranges, whether intermittent operation or continuous operation. However, due to the use of multiple sets of guide plate structures, the existing mixer has a longer overall size, which increases the resistance loss along the way, and due to the small channel area, it is easy to get blocked, etc., so how to provide a butterfly static mixer is particularly important. Summary of the invention

[0005] In order to overcome the shortcomings of the background technology, the present invention provides a butterfly type static mixer. The present invention arranges a guide plate on the outer shell, and arranges guide blades on the guide plate. The main fluid forms a vortex flow after passing through the guide blades. At the same time, the mixed fluid enters the position close to the guide blades through the mixed medium inlet pipe. The mixed fluid changes its flow direction through the guide blades, so that the mixed fluid is sheared with the main fluid at a predetermined angle, and the turbulence is enhanced, thereby enhancing the mixing effect.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solution:

[0007] A butterfly type static mixer comprises a mixed medium inlet pipe, an outer shell and a guide plate. At least one through hole penetrating to the inner edge surface of the outer shell is provided on the outer edge surface of the outer shell, a mixed medium inlet pipe is provided in the through hole, a guide plate is provided on the left side of the inner edge surface of the outer shell, a guide hole is provided in the middle of the guide plate, at least one group of guide blades are symmetrically provided on the sides of the guide hole, and the end of the mixed medium inlet pipe passes through the through hole and extends to the top of the guide blade to form the butterfly type static mixer.

[0008] In the butterfly type static mixer, the angle between the guide vane and the end face of the guide plate is 15° to 30°.

[0009] The shell of the butterfly-type static mixer is a circular ring structure.

[0010] In the butterfly-type static mixer, the guide hole is any one of a dumbbell-shaped hole, a special-shaped hole or a cross-shaped hole.

[0011] In the butterfly static mixer, when the guide hole is set as a dumbbell-shaped hole, a group of inwardly extending guide blades A are symmetrically arranged on both sides of the dumbbell-shaped hole, and the angle between each inwardly extending guide blade A and the end face of the guide plate is 15° to 30°.

[0012] In the butterfly type static mixer, when the guide hole is set as a special-shaped hole, two groups of inwardly extending guide blades B are symmetrically arranged on the side of the special-shaped hole, and the angle between each inwardly extending guide blade B and the end face of the guide plate is 15° to 30°.

[0013] In the butterfly type static mixer, when the guide hole is set as a cross hole, a group of inwardly extending guide blades C are symmetrically arranged on both sides of the cross hole, and the angle between each inwardly extending guide blade C and the end face of the guide plate is 15° to 30°.

[0014] In the butterfly-type static mixer, the angle between the central axis of the through hole and the radial center of the shell is 0° to 30°.

[0015] In the butterfly type static mixer, the guide plate is welded to the inner edge surface of the shell.

[0016] In the butterfly type static mixer, the mixed medium inlet pipe is welded in the through hole.

[0017] By adopting the above technical solution, the present invention has the following advantages:

[0018] The present invention arranges a guide plate on the outer shell, and guide blades on the guide plate. The main fluid forms a vortex flow after passing through the guide blades. At the same time, the mixed fluid enters a position close to the guide blades through a mixed medium inlet pipe. The mixed fluid changes its flow direction through the guide blades, so that the mixed fluid forms a shear with the main fluid at a predetermined angle, and strengthens turbulence, thereby enhancing the mixing effect. The length of the present invention is greatly shortened compared with the traditional mixer, and it is not easy to be blocked. Due to the shortened length, the resistance loss along the way is reduced, thereby fully utilizing the pressure energy of the fluid to enable efficient mixing of the two-phase flow. The present invention has a small overall pressure drop, a good mixing effect, a simple overall structure, a long service life, and a low cost, and is therefore suitable for occasions where mixing is required in various industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a left-side structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the guide plate in the present invention;

[0022] Figure 4 for Figure 3 A schematic cross-sectional structure diagram of ;

[0023] Figure 5 It is a schematic diagram of the structure of the special-shaped flow guide hole in the present invention;

[0024] Figure 6 A schematic diagram of the medium flow direction in an embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the guide vane in the present invention;

[0026] Figure 8 It is a schematic diagram of the application of the present invention;

[0027] In the figure: 1. mixed medium inlet pipe; 2. outer shell; 3. guide plate; 301. inwardly extending guide blade A; 302. dumbbell-shaped hole; 303. special-shaped hole; 304. inwardly extending guide blade B; 305. cross-shaped hole; 306. inwardly extending guide blade C; 4. main fluid; 5. mixed fluid; 6. vortex; 7. upstream pipeline flange; 8. upstream pipeline of mixer; 9. downstream pipeline flange; 10. downstream pipeline of mixer. DETAILED DESCRIPTION

[0028] The present invention can be explained in more detail by the following examples, but the present invention is not limited to the following examples;

[0029] First of all, it should be explained that the directions or positional relationships indicated by “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside”, and “outside” when describing the structure of the present invention are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] Combined with Figures 1 to 8 A butterfly-type static mixer is shown, comprising a mixed medium inlet pipe 1, a shell 2 and a guide plate 3, wherein the shell 2 is a circular ring structure. During implementation, due to the short length of the shell 2, the drag loss along the way caused by friction is reduced, so that the kinetic energy of the fluid is fully utilized in mixing. Moreover, due to the small number of mixing units, compared with a traditional multi-piece series static mixer, the possibility of clogging is greatly reduced, and the maintenance cost is reduced. At least one through hole is provided on the outer edge surface of the shell 2 and passes through to the inner edge surface of the shell 2. The central axis of the through hole has an angle of 1.5° with the radial center of the shell 2. 0°~30°, a mixed medium inlet pipe 1 is arranged in the through hole, the mixed medium inlet pipe 1 is welded in the through hole, a guide plate 3 is arranged on the left side of the inner edge surface of the shell 2, a guide hole is arranged in the middle of the guide plate 3, the guide hole is any one of a dumbbell-shaped hole 302, a special-shaped hole 303 or a cross-shaped hole 305, at least one group of guide blades are symmetrically arranged on the side of the guide hole, the angle between the guide blade and the end face of the guide plate 3 is 15°~30°, the end of the mixed medium inlet pipe 1 passes through the through hole and extends to the top of the guide blade, when implemented, as Figure 1 As shown, the mixed medium inlet pipe 1 radially passes through the outer shell 2 and extends inward to the upper right side of the guide vane, so that the mixed fluid 5 and the main fluid 4 can be mixed with high-intensity shear turbulent flow through the guide vane.

[0031] In implementation, the guide hole is preferably a dumbbell-shaped hole 302, such as Figure 2 , 3 As shown in Figure 4, the dumbbell-shaped hole 302 is composed of two arcs of equal diameter and arc-shaped blades extending inward. The arc-shaped blades are inclined at an angle of 15° to 30° from the position tangent to the two arcs of equal diameter to the downstream of the fluid to form an inwardly extending guide blade A301. The guide plate 3 is connected to the shell 2 by welding or other reliable connection methods. When the main fluid 4 passes through the dumbbell-shaped hole 302 and the inwardly extending guide blade A301, an alternating vortex 6 is formed at the tail due to the influence of the inwardly extending guide blade A301, and the mixed fluid 5 coming from the mixed medium inlet pipe 1 is sheared with the main fluid 4 at an angle of 15° to 30° through the inwardly extending guide blade A301, which strengthens the turbulent intensity of the fluid, thereby allowing the two-phase flow to be mixed quickly, reducing the length of the downstream pipeline of the mixer and saving costs.

[0032] Further, if Figure 5 As shown, when the guide hole is set as a special-shaped hole 303, two groups of inwardly extending guide blades B304 are symmetrically arranged on the side of the special-shaped hole 303, and the angle between each inwardly extending guide blade B304 and the end face of the guide plate 3 is 15° to 30°, that is, four inwardly extending guide blades B304 are arranged on the side of the special-shaped hole 303, and the four inwardly extending guide blades B304 are inclined 15° to 30° toward the downstream of the main medium.

[0033] Further, if Figure 6 As shown, when the guide hole is set as a cross-shaped hole 305, a group of inwardly extending guide vanes C306 are symmetrically arranged on both sides of the cross-shaped hole 305, and the angle between each inwardly extending guide vane C306 and the end face of the guide plate 3 is 15° to 30°, that is, the cross-shaped hole 305 is a mutually perpendicular through rectangular groove, and the rectangular groove forms an angle of 45° with the central vertical line. The inwardly extending triangle formed by the two sides of the adjacent distance groove is the inwardly extending guide vane C306, and the inwardly extending guide vane C306 is inclined 15° to 30° downstream of the main medium.

[0034] Further, attached Figure 7 It is the streamline trajectory inside the butterfly static mixer. When the main fluid 4 passes through the guide vane, the flow velocity of the main fluid 4 increases due to the contraction of the flow channel area, and the turbulence intensity of the main fluid 4 increases due to the disturbance of the guide vane. After passing through the guide vane, the speed of the main fluid 4 decreases due to the sudden change of the flow channel cross section, and the kinetic energy of movement is converted into static pressure energy. The mixed fluid 5 downstream of the guide vane flows out from the outlet of the mixed medium inlet pipe 1, and then under the action of the viscous shear force, the mixed fluid 5 exchanges momentum with the main fluid 4 and flows downstream with the main fluid 4. Since the main fluid 4 forms an adverse pressure gradient downstream of the guide vane, a vortex 6 is formed downstream of the guide vane under the action of the adverse pressure gradient. Due to the energy dissipation of the vortex 6, the vortex 6 constantly appears and disappears, thus forming an alternating vortex 6.

[0035] Further, attached Figure 8 It is an application schematic diagram of the present invention. In the present invention, the left and right sides of the housing 2 are respectively connected to the upstream pipeline flange 7 on the upstream pipeline 8 of the mixer and the downstream pipeline flange 9 on the downstream pipeline 10 of the mixer, and then the fluid is mixed.

[0036] The present invention has the following advantages:

[0037] 1. The present invention adopts a special design concept. By setting a dumbbell-shaped hole 302 in the center of the guide plate 3, the inwardly extending guide blade A301 on the guide plate 3 is set at 15° to 30° with the guide plate 3, the turbulent flow of the main fluid 4 and the vortex of the mixed fluid 5 are strengthened, thereby making the mixing efficiency higher;

[0038] 2. In order to achieve a better mixing effect, the existing mixer equipment often needs to set up multiple continuous mixing units in series to achieve the desired effect. The present invention adopts a special design concept. Compared with the existing mixer, it does not require the series connection of multiple groups of mixing units, greatly shortens the equipment size, reduces the capital investment in the equipment, and saves material costs;

[0039] 3. The existing mixer equipment uses multiple mixing units connected in series. During operation and use, the overall pressure drop of the mixed fluid is large, which is not conducive to the continued operation of the subsequent device. In order to ensure the operation of the subsequent device, a booster device needs to be set up separately. Due to the compact structure and short length of the present invention, there is no need for multiple groups of mixing units to be connected in series, which reduces the resistance loss along the way due to friction. At the same time, due to the short length, there is no problem of blockage, and the service life is greatly improved. Since the present invention has a small overall pressure drop, a good mixing effect, a simple overall structure, a long service life, and a low cost, it is suitable for occasions where mixing is required in various industries.

[0040] Parts of the present invention not described in detail are prior art.

[0041] The embodiments selected herein for the purpose of disclosing the invention are currently considered to be suitable, but it should be understood that the invention is intended to include all changes and modifications of the embodiments that fall within the scope of the concept and invention.

Claims

1. A butterfly-type static mixer, comprising a mixed medium inlet pipe (1), a housing (2) and a guide plate (3), wherein: At least one through hole is provided on the outer edge surface of the shell (2) and extends to the inner edge surface of the shell (2), the central axis of the through hole and the radial center angle of the shell (2) are 0° to 30°, a mixed medium inlet pipe (1) is provided in the through hole, a guide plate (3) is provided on the left side of the inner edge surface of the shell (2), a guide hole is provided in the middle of the guide plate (3), at least one group of guide blades are symmetrically provided on the side of the guide hole, and the end of the mixed medium inlet pipe (1) passes through the through hole and extends to the top of the guide blade to form the butterfly-type static mixer; The angle between the guide blade and the end surface of the guide plate (3) is 15° to 30°.

2. The butterfly type static mixer according to claim 1 is characterized in that: The outer shell (2) is a circular ring structure.

3. The butterfly type static mixer according to claim 1 is characterized in that: The guide hole is any one of a dumbbell-shaped hole (302), a special-shaped hole (303), or a cross-shaped hole (305).

4. The butterfly type static mixer according to claim 3 is characterized in that: When the guide hole is configured as a dumbbell-shaped hole (302), a group of inwardly extending guide blades A (301) are symmetrically provided on both sides of the dumbbell-shaped hole (302), and the angle between each inwardly extending guide blade A (301) and the end surface of the guide plate (3) is 15° to 30°.

5. The butterfly type static mixer according to claim 3 is characterized in that: When the guide hole is set as a special-shaped hole (303), two groups of inwardly extending guide blades B (304) are symmetrically arranged on the side of the special-shaped hole (303), and the angle between each inwardly extending guide blade B (304) and the end surface of the guide plate (3) is 15° to 30°.

6. The butterfly type static mixer according to claim 3 is characterized in that: When the guide hole is set as a cross-shaped hole (305), a group of inwardly extending guide blades C (306) are symmetrically arranged on both sides of the cross-shaped hole (305), and the angle between each inwardly extending guide blade C (306) and the end surface of the guide plate (3) is 15° to 30°.

7. The butterfly type static mixer according to claim 1 is characterized in that: The guide plate (3) is welded to the inner edge surface of the outer shell (2).

8. The butterfly type static mixer according to claim 1 is characterized in that: The mixed medium inlet pipe (1) is welded in the through hole.

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