WO2021160594A1 - Static mixer including a mixing element - Google Patents

Static mixer including a mixing element Download PDF

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Publication number
WO2021160594A1
WO2021160594A1 PCT/EP2021/053048 EP2021053048W WO2021160594A1 WO 2021160594 A1 WO2021160594 A1 WO 2021160594A1 EP 2021053048 W EP2021053048 W EP 2021053048W WO 2021160594 A1 WO2021160594 A1 WO 2021160594A1
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WO
WIPO (PCT)
Prior art keywords
mixing
mixing element
flow
ball
static mixer
Prior art date
Application number
PCT/EP2021/053048
Other languages
French (fr)
Inventor
Eivind SINGDAHLSEN
Original Assignee
Stauper Offshore As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stauper Offshore As filed Critical Stauper Offshore As
Publication of WO2021160594A1 publication Critical patent/WO2021160594A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
    • B01F25/4231—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4311—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431971—Mounted on the wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431974—Support members, e.g. tubular collars, with projecting baffles fitted inside the mixing tube or adjacent to the inner wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F16K47/045—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member and the closure member being rotatable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F16K47/06—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member with a throttle in the form of a helical channel

Definitions

  • Present invention relates to a static mixer including a mixing element said mixing element comprising : a) an annular outer rim b) one or more wing elements attached to the outer rim, c) a flow breaker element attached to the outer rim, wherein the leading surface of the one or more wing element(s) har an angle 3i in relation to the flow direction of 10 - 90 degrees and the leading surface of the wing elements are provided with recesses.
  • Static mixers for mixing of liquid/gas, liquid/liquid or liquid/solids need an approximately steady flow of incoming liquid or liquid/gas to obtain a satisfactory mixing.
  • Most static mixers have a relatively small operating range and if the incoming flow is too low or too high, the mixing will not be sufficient for the intended subsequent use or processing of the mixed materials.
  • One problem with such static mixers is that it is not possible to regulate the mixer to adapt to different flow rates and the type of materials to be mixed to obtain an adequate mixing. Further, static mixers with only one mixing element, can be vulnerable for clogging, which can be remedied by backflushing or replacement of the mixing element.
  • the gas-liquid mixer comprises a tank, wherein the bottom of the tank is connected with a mixer, one end of the mixer is connected with a liquid inlet pipeline, and the other end is connected with a gas source through a gas inlet pipeline, a pipe diameter changing devise for adjusting gas volume is arranged on the gas inlet pipeline and comprises a cylinder, a rotating shaft capable of rotating the cylinder freely is arranged at the center of the cylinder, and two ends of the rotating shaft are fixed on a gas inlet pipeline through snap rings respectively.
  • a plurality of gas guide holes with different diameters are formed in the cylinder in the axial direction, and internal threads for being connected with the gas inlet pipeline are arranged at the two ends of each of the as guided holes.
  • WO2012095623A describes a static mixer assembly which is a cylindrical tube with three pairs of fins extending inwards from the inner wall of the tube.
  • the central fins form a prow pointing upstream, with two pairs of flanking fins arranged to prevent unhindered fluid flow parallel to the central axis in a peripheral region.
  • EP 0 166375 describes a valve assembly comprises for the purpose of noise reduction attenuator means comprised of portions of static elements, preferably mounted on the valve member, and preferably divided into sections of decreasing resistance in fluid flow direction.
  • the valve is a ball valve.
  • a second problem with the prior art static mixers is clogging, fouling and accumulation of particles that will reduce the overall efficacy of the mixer over time.
  • a static mixer including a mixing element, said mixing element comprises: a) an annular outer rim b) one or more wing elements attached to the outer rim, c) a flow breaker element attached to the outer rim, wherein the leading surface of the one or more wing element has an angle 3i in relation to the flow direction of 10 - 90 degrees and the leading surface of the wing elements are provided with recesses, wherein the static mixer is a ball valve, with a ball with two through-going openings, said through-going openings are provided 90 degrees to each other, that each opening is provided with a mixing element, said mixing element having different mixing characteristics, said ball can be rotated into two positions, one position where the mixing element with the lowest mixing capacity is facing an incoming flow to be mixed and a second position where the mixing element with relatively large mixing capacity is facing the incoming flow to be mixed.
  • the mixing elements are preferably releasably attached to the ball.
  • the mixing elements and the ball is provided as one unitary element.
  • the mixing element and the ball are provided as one unitary element and is preferably made of steel, more preferred of stainless steel. In one embodiment, the mixing element and ball are preferably made by laser printing.
  • the mixing element is placed between two flanges.
  • Figures 1 A-1 F depicts some preferred embodiments of the mixing element (1 ) according to the invention, where Figs. 1 A and 1 B depicts an embodiment of a mixing element (1) with five wing elements (2) and one flow-breaker element (3) for high flow and low flow, respectively, Fig. 1C and 1 D depicts an embodiments of a mixing element (1) with three wing elements (2) and one flow-breaker element (3) for high and low flow, respectively, and Figs. 1 E and 1 F depicts an embodiment of a mixing element (1) with two wing elements (2) and one flow- breaker element (3) for high and low flow respectively.
  • Figures 2A- 2F depicts a preferred embodiment of the wing element (2) according to present invention seen from different sides, where Fig. 2A is seen from the bottom,
  • Fig.2B is seen from the front
  • Fig. 2C is seen from left
  • Fig. 2D is seen from above
  • Fig. 2E is seen from the back and Fig. 2F is a perspective view.
  • Figures 3A-3G depicts a preferred embodiment of the flow-breaker element (3) according to present invention, where Fig. 3A shows the flow-breaker element seen from underneath, Fig. 3B from the front, Fig. 3C from left, 3D from the back, 3E from the top and Fig. 3F is a perspective view. Fig. 3G is an isometric view of the flow-breaker element seen from the front.
  • Figures 4A-4C depicts a static mixer in the form of a modified ball valve.
  • Figures 5A-5C depicts another preferred embodiment of a static mixer including a mixing element according to the invention.
  • Figure 1A-1 F depicts a mixing element (1 ) according to present invention.
  • the mixing element (1 ) comprises two or more wing-elements (2) and a flow-breaker element (3).
  • the mixing element (1 ) has an annular outer rim (4) to which is attached one or more wing-elements (2) and the flow-breaker element (3).
  • the wing-element (2) has a leading surface which is somewhat slanted in relation to the direction of the flow of materials to be mixed.
  • the flow direction of the incoming materials to be mixed is perpendicular to the paper plane of in figure 1 .
  • the angle Bi is 10 - 90 degrees
  • angle 32 is between 10 to 90 degrees
  • the angle 33 is preferably degrees.
  • the angel 33 will vary depending on the number of wing elements (2).
  • the purpose of the slanted wing element is to give the incoming flow of materials a rotational movement to enhance the mixing of materials.
  • the mixing element (1) comprises a flow-breaker element (3), the purpose of which is to interfere with the rotational movement of the flow and create turbulent conditions to improve the mixing of the materials.
  • the flow breaker (3) is shown in more detail in Figs. 3A to 3G, sowing a preferred embodiment of the flow breaker, where radius Ri can be 3,50 mm, radius R2 is 10-40% of the pipe inner diameter and centered in the pipe, R4 can be 11 ,50 mm, angle CM is 10 - 30 degrees and angle 02 is 110 - 180 degrees.
  • the wing-elements (2) can be provided with recesses (10) on the front face to further improve the mixing effect.
  • the open flow area of the mixing element (1) not covered by the wing elements (2) and the flow-breaker element (3) determines the maximum flow of materials through the mixing element (1 ). If this area is too small or too big, it will not be possible to obtain the desired mixing efficiency.
  • the dimension of the open flow area, the number and size of the wing-elements (2) and the flow-breaker element (3) will have to be adapted to the flowrate through the mixing element (1), the nature of the materials to be mixed, and the allowable pressure drop over the mixing element (1).
  • mixing elements (1) fulfilling the requirements mentioned above, in order to achieve a sufficient mixing of the elements, it is possible to use mixing elements (1) with different open flow area, different number and dimensions of the wing elements (2). This is further detailed in figures 1 A-1 F, which show preferred embodiments of mixing elements (1) different numbers of wing elements (2) and dimensions of the open flow area.
  • FIGS. 2A-2F show further details of the wing element (2) and figures 3A-3G show further details of the flow-breaker element (3).
  • Figures 4A-4C depicts an embodiment where the mixing elements according to present invention are installed in a modified ball (5) of a ball valve (6) (fig. 4A).
  • a normal ball valve(6) has one through-going aperture and only two operational states, namely one state where the through-going aperture is the oriented parallel to the flow direction, in which the valve will allow flow through the valve, and another state, where the aperture is oriented 90°to the flow direction and will close off the flow.
  • Fig. 4B depicts an exploded view of the ball (5).
  • the ball (5) has been modified by providing two through going apertures (7, 8) arranged 90°to each other.
  • a mixing element (1) is installed in each of these two apertures.
  • the mixing elements (1) have different dimensions and flow areas, for example one mixing element(1) for a high through put and one mixing element (1) for a low through put. In this embodiment, it is possible to adjust the mixing efficacy to either high flow or low flow, by simply turning the handle of the modified ball valve (6) 90 degrees.
  • the mixing elements (1) can be permanently fixed to the ball (5) or can be interchangeable.
  • the ball (5) and the mixing element (1) are made in one unitary body.
  • the mixing element (1) can be made of steel, preferably stainless steel.
  • the mixing element (1 ) can be made by laser printing. If it is necessary to change the mixing characteristics of the static mixer, the modified ball valve (6) can be disassembled and replaced by another ball (5) with the requisite mixing properties.
  • the mixing elements (1) are releasably connected to the ball (5) by means of suitable fastening means.
  • the modified ball valve (6) can be dismantled and the existing mixing elements (1) can be released from the ball (5) and exchanged with mixing elements (1) with the requisite mixing properties.
  • Fig. 5A-C depicts another preferred embodiment of a static mixer incorporating a mixing element (1) according to the invention.
  • the mixing element (1) can be mounted between two flanges (9). If it is necessary to exchange the mixing element (1) with another mixing element having different mixing characteristics, the flanges (9) are separated, the mixing element (1) is replaced with the requisite mixing element (1) and is placed between the flanges, whereinafter the flanges (9) are bolted together with the mixing element (1) interposed between the flanges.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Static mixer including a mixing element (1) said mixing element (1) comprising: a) an annular outer rim (4) b) one or more wing elements (2) attached to the outer rim (4), c) a flow breaker element (3) attached to the outer rim (4), wherein the leading surface of the one or more wing element (2) has an angle ß1 in relation to the flow direction of 10 – 90 degrees and the leading surface of the wing elements (2) are provided with recesses (10), wherein the static mixer is a ball valve (6), with a ball (5) with two through-going openings (7, 8), said through-going openings are provided 90 degrees to each other, that each opening (7, 8) is provided with a mixing element (1), said mixing element (1) having different mixing characteristics, said ball (5) can be rotated into two positions, one position where the mixing element (1) with the lowest mixing capacity is facing an incoming flow to be mixed and a second position where the mixing element (1) with relatively large mixing capacity is facing the incoming flow to be mixed.

Description

STATIC MIXER INCLUDING A MIXING ELEMENT
Technical Field
Present invention relates to a static mixer including a mixing element said mixing element comprising : a) an annular outer rim b) one or more wing elements attached to the outer rim, c) a flow breaker element attached to the outer rim, wherein the leading surface of the one or more wing element(s) har an angle 3i in relation to the flow direction of 10 - 90 degrees and the leading surface of the wing elements are provided with recesses.
Background Art
Static mixers for mixing of liquid/gas, liquid/liquid or liquid/solids need an approximately steady flow of incoming liquid or liquid/gas to obtain a satisfactory mixing. Most static mixers have a relatively small operating range and if the incoming flow is too low or too high, the mixing will not be sufficient for the intended subsequent use or processing of the mixed materials. One problem with such static mixers, is that it is not possible to regulate the mixer to adapt to different flow rates and the type of materials to be mixed to obtain an adequate mixing. Further, static mixers with only one mixing element, can be vulnerable for clogging, which can be remedied by backflushing or replacement of the mixing element.
One proposed solution to this problem with handling varying flow and mixer capacity is known from CN108325401. This publication described a gas-liquid mixer with capacity for quickly changing pipe diameter. The gas-liquid mixer comprises a tank, wherein the bottom of the tank is connected with a mixer, one end of the mixer is connected with a liquid inlet pipeline, and the other end is connected with a gas source through a gas inlet pipeline, a pipe diameter changing devise for adjusting gas volume is arranged on the gas inlet pipeline and comprises a cylinder, a rotating shaft capable of rotating the cylinder freely is arranged at the center of the cylinder, and two ends of the rotating shaft are fixed on a gas inlet pipeline through snap rings respectively. A plurality of gas guide holes with different diameters are formed in the cylinder in the axial direction, and internal threads for being connected with the gas inlet pipeline are arranged at the two ends of each of the as guided holes.
WO2012095623A describes a static mixer assembly which is a cylindrical tube with three pairs of fins extending inwards from the inner wall of the tube. The central fins form a prow pointing upstream, with two pairs of flanking fins arranged to prevent unhindered fluid flow parallel to the central axis in a peripheral region.
EP 0 166375 describes a valve assembly comprises for the purpose of noise reduction attenuator means comprised of portions of static elements, preferably mounted on the valve member, and preferably divided into sections of decreasing resistance in fluid flow direction. In one embodiment, the valve is a ball valve.
One disadvantage with this prior art solution is that it is only to possible to regulate the gas flow, not the mixed flow of gas/liquid or liquid/liquid.
A second problem with the prior art static mixers is clogging, fouling and accumulation of particles that will reduce the overall efficacy of the mixer over time.
Summary of invention
The purpose of present invention is to provide a solution that overcomes the above mentioned disadvantages with the prior art solutions. These and other purposes are achieved by a static mixer including a mixing element, said mixing element comprises: a) an annular outer rim b) one or more wing elements attached to the outer rim, c) a flow breaker element attached to the outer rim, wherein the leading surface of the one or more wing element has an angle 3i in relation to the flow direction of 10 - 90 degrees and the leading surface of the wing elements are provided with recesses, wherein the static mixer is a ball valve, with a ball with two through-going openings, said through-going openings are provided 90 degrees to each other, that each opening is provided with a mixing element, said mixing element having different mixing characteristics, said ball can be rotated into two positions, one position where the mixing element with the lowest mixing capacity is facing an incoming flow to be mixed and a second position where the mixing element with relatively large mixing capacity is facing the incoming flow to be mixed.
The mixing elements are preferably releasably attached to the ball.
Preferably the mixing elements and the ball is provided as one unitary element.
The mixing element and the ball are provided as one unitary element and is preferably made of steel, more preferred of stainless steel. In one embodiment, the mixing element and ball are preferably made by laser printing.
According to another preferred embodiment, the mixing element is placed between two flanges.
Brief description of drawings Figures 1 A-1 F depicts some preferred embodiments of the mixing element (1 ) according to the invention, where Figs. 1 A and 1 B depicts an embodiment of a mixing element (1) with five wing elements (2) and one flow-breaker element (3) for high flow and low flow, respectively, Fig. 1C and 1 D depicts an embodiments of a mixing element (1) with three wing elements (2) and one flow-breaker element (3) for high and low flow, respectively, and Figs. 1 E and 1 F depicts an embodiment of a mixing element (1) with two wing elements (2) and one flow- breaker element (3) for high and low flow respectively. Figures 2A- 2F depicts a preferred embodiment of the wing element (2) according to present invention seen from different sides, where Fig. 2A is seen from the bottom,
Fig.2B is seen from the front, Fig. 2C is seen from left, Fig. 2D is seen from above,
Fig. 2E is seen from the back and Fig. 2F is a perspective view.
Figures 3A-3G depicts a preferred embodiment of the flow-breaker element (3) according to present invention, where Fig. 3A shows the flow-breaker element seen from underneath, Fig. 3B from the front, Fig. 3C from left, 3D from the back, 3E from the top and Fig. 3F is a perspective view. Fig. 3G is an isometric view of the flow-breaker element seen from the front.
Figures 4A-4C depicts a static mixer in the form of a modified ball valve.
Figures 5A-5C depicts another preferred embodiment of a static mixer including a mixing element according to the invention.
Detailed description of the invention
Figure 1A-1 F depicts a mixing element (1 ) according to present invention. The mixing element (1 ) comprises two or more wing-elements (2) and a flow-breaker element (3). In the embodiments shown in Fig. 1 A-1 F, the mixing element (1 ) has an annular outer rim (4) to which is attached one or more wing-elements (2) and the flow-breaker element (3). The wing-element (2) has a leading surface which is somewhat slanted in relation to the direction of the flow of materials to be mixed. The flow direction of the incoming materials to be mixed is perpendicular to the paper plane of in figure 1 . In the shown embodiment, the angle Bi is 10 - 90 degrees, angle 32 is between 10 to 90 degrees and the angle 33 is preferably degrees. However, the angel 33 will vary depending on the number of wing elements (2). The purpose of the slanted wing element is to give the incoming flow of materials a rotational movement to enhance the mixing of materials. Further, the mixing element (1) comprises a flow-breaker element (3), the purpose of which is to interfere with the rotational movement of the flow and create turbulent conditions to improve the mixing of the materials. The flow breaker (3) is shown in more detail in Figs. 3A to 3G, sowing a preferred embodiment of the flow breaker, where radius Ri can be 3,50 mm, radius R2 is 10-40% of the pipe inner diameter and centered in the pipe, R4 can be 11 ,50 mm, angle CM is 10 - 30 degrees and angle 02 is 110 - 180 degrees. Further, the wing-elements (2) can be provided with recesses (10) on the front face to further improve the mixing effect.
The open flow area of the mixing element (1) not covered by the wing elements (2) and the flow-breaker element (3), determines the maximum flow of materials through the mixing element (1 ). If this area is too small or too big, it will not be possible to obtain the desired mixing efficiency. The dimension of the open flow area, the number and size of the wing-elements (2) and the flow-breaker element (3) will have to be adapted to the flowrate through the mixing element (1), the nature of the materials to be mixed, and the allowable pressure drop over the mixing element (1).
In order to provide mixing elements (1) fulfilling the requirements mentioned above, in order to achieve a sufficient mixing of the elements, it is possible to use mixing elements (1) with different open flow area, different number and dimensions of the wing elements (2). This is further detailed in figures 1 A-1 F, which show preferred embodiments of mixing elements (1) different numbers of wing elements (2) and dimensions of the open flow area.
Typical examples of dimensions and embodiments of the mixing-element (1 ) are shown in table 1 beneath: Table 1
Figure imgf000007_0001
Figures 2A-2F show further details of the wing element (2) and figures 3A-3G show further details of the flow-breaker element (3).
Figures 4A-4C depicts an embodiment where the mixing elements according to present invention are installed in a modified ball (5) of a ball valve (6) (fig. 4A). A normal ball valve(6) has one through-going aperture and only two operational states, namely one state where the through-going aperture is the oriented parallel to the flow direction, in which the valve will allow flow through the valve, and another state, where the aperture is oriented 90°to the flow direction and will close off the flow.
Fig. 4B depicts an exploded view of the ball (5). Instead of a ball (5) for a ball valve (6) with only one through-going aperture, the ball (5) has been modified by providing two through going apertures (7, 8) arranged 90°to each other. In each of these two apertures, a mixing element (1) is installed. The mixing elements (1) have different dimensions and flow areas, for example one mixing element(1) for a high through put and one mixing element (1) for a low through put. In this embodiment, it is possible to adjust the mixing efficacy to either high flow or low flow, by simply turning the handle of the modified ball valve (6) 90 degrees. The mixing elements (1) can be permanently fixed to the ball (5) or can be interchangeable.
If the efficacy of the mixing element is reduced by clogging or accumulation of particles, this can be remedied by turning the ball (5) 180° so that the incoming flow is passing through the mixing element (1) in a reverse direction with the regards to the normal flow. In this way, the incoming flow can clean the mixing element (1) and the mixing efficacy is restored.
In one embodiment of the invention, the ball (5) and the mixing element (1) are made in one unitary body. The mixing element (1) can be made of steel, preferably stainless steel. In a preferred embodiment, the mixing element (1 ) can be made by laser printing. If it is necessary to change the mixing characteristics of the static mixer, the modified ball valve (6) can be disassembled and replaced by another ball (5) with the requisite mixing properties. In another preferred embodiment, the mixing elements (1) are releasably connected to the ball (5) by means of suitable fastening means.
If it is necessary to change the mixing characteristics of this static mixer, the modified ball valve (6) can be dismantled and the existing mixing elements (1) can be released from the ball (5) and exchanged with mixing elements (1) with the requisite mixing properties.
Fig. 5A-C depicts another preferred embodiment of a static mixer incorporating a mixing element (1) according to the invention. In this embodiment, the mixing element (1) can be mounted between two flanges (9). If it is necessary to exchange the mixing element (1) with another mixing element having different mixing characteristics, the flanges (9) are separated, the mixing element (1) is replaced with the requisite mixing element (1) and is placed between the flanges, whereinafter the flanges (9) are bolted together with the mixing element (1) interposed between the flanges.

Claims

Claims
1.
Static mixer including a mixing element (1) said mixing element (1) comprising: a) an annular outer rim (4) b) one or more wing elements (2) attached to the outer rim (4), c) a flow breaker element (3) attached to the outer rim (4), wherein the leading surface of the one or more wing element (2) has an angle 3i in relation to the flow direction of 10 - 90 degrees and the leading surface of the wing elements (2) are provided with recesses (10), characterized in that the static mixer is a ball valve (6), with a ball (5) with two through-going openings (7, 8), said through-going openings are provided 90 degrees to each other, that each opening (7, 8) is provided with a mixing element (1), said mixing element (1) having different mixing characteristics, said ball (5) can be rotated into two positions, one position where the mixing element (1) with the lowest mixing capacity is facing an incoming flow to be mixed and a second position where the mixing element (1) with relatively large mixing capacity is facing the incoming flow to be mixed.
2.
Static mixer according to claim 1 , characterized in that the mixing elements (1) are releasably attached to the ball (5).
3.
Static mixer according to claim 1 , characterized in that the mixing elements (1) and the ball (5) is provided as one unitary element.
4.
Static mixer according to claim 3, characterized in that the mixing element (1) and the ball (5) are provided as one unitary element and is made of steel, preferably stainless steel.
5.
Static mixer according to any of the preceding claims 1 to 4, characterized in that the mixing element (1) and ball (5) are made by laser printing.
Static mixer including a mixing element (1) according to claim 1 , characterized in that the mixing element (1 ) is placed between two flanges (9).
PCT/EP2021/053048 2020-02-11 2021-02-09 Static mixer including a mixing element WO2021160594A1 (en)

Applications Claiming Priority (2)

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NO20200169 2020-02-11
NO20200169A NO345609B1 (en) 2020-02-11 2020-02-11 Static mixer including a mixing element

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EP0166375A2 (en) 1984-06-28 1986-01-02 Ferdi W. Brücken A fluid valve
EP1036588A1 (en) * 1999-03-05 2000-09-20 Fujikin Incorporated Static mixing device
US20010038575A1 (en) * 2000-05-08 2001-11-08 Peter Mathys Mixing element for a flange transition in a pipeline
US20020070248A1 (en) * 2000-11-20 2002-06-13 Lohr James H. High flow/low flow mixing and dispensing apparatus
EP2085753A1 (en) * 2008-01-31 2009-08-05 Services Pétroliers Schlumberger Flow meter inserted in a ball valve
WO2012095623A1 (en) 2011-01-15 2012-07-19 Statiflo International Limited Static mixer assembly
CN108325401A (en) 2018-01-17 2018-07-27 天津博迈科海洋工程有限公司 It is a kind of can be with the air and liquid mixer of quick-replaceable caliber
WO2019005745A1 (en) * 2017-06-30 2019-01-03 Forum Us, Inc. Mixing assembly

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CN105771779B (en) * 2016-04-06 2018-10-30 南京林业大学 A kind of composite static mixer
CN110180423A (en) * 2019-06-05 2019-08-30 江苏恒泰泳池科技股份有限公司 A kind of liquid liquid mixer and its working method

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Publication number Priority date Publication date Assignee Title
EP0166375A2 (en) 1984-06-28 1986-01-02 Ferdi W. Brücken A fluid valve
EP1036588A1 (en) * 1999-03-05 2000-09-20 Fujikin Incorporated Static mixing device
US20010038575A1 (en) * 2000-05-08 2001-11-08 Peter Mathys Mixing element for a flange transition in a pipeline
US20020070248A1 (en) * 2000-11-20 2002-06-13 Lohr James H. High flow/low flow mixing and dispensing apparatus
EP2085753A1 (en) * 2008-01-31 2009-08-05 Services Pétroliers Schlumberger Flow meter inserted in a ball valve
WO2012095623A1 (en) 2011-01-15 2012-07-19 Statiflo International Limited Static mixer assembly
WO2019005745A1 (en) * 2017-06-30 2019-01-03 Forum Us, Inc. Mixing assembly
CN108325401A (en) 2018-01-17 2018-07-27 天津博迈科海洋工程有限公司 It is a kind of can be with the air and liquid mixer of quick-replaceable caliber

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116589063A (en) * 2023-07-12 2023-08-15 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) Groundwater pollution filtration purifier
CN116589063B (en) * 2023-07-12 2023-09-26 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) Groundwater pollution filtration purifier

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