WO2023161256A1 - Corps de retenue, agencement de corps de retenue et séparateur à cyclone à courant continu - Google Patents

Corps de retenue, agencement de corps de retenue et séparateur à cyclone à courant continu Download PDF

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Publication number
WO2023161256A1
WO2023161256A1 PCT/EP2023/054382 EP2023054382W WO2023161256A1 WO 2023161256 A1 WO2023161256 A1 WO 2023161256A1 EP 2023054382 W EP2023054382 W EP 2023054382W WO 2023161256 A1 WO2023161256 A1 WO 2023161256A1
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WO
WIPO (PCT)
Prior art keywords
bluff body
pipe section
bluff
vane
cyclone separator
Prior art date
Application number
PCT/EP2023/054382
Other languages
German (de)
English (en)
Inventor
Tayyar Yücel Bayrakci
Original Assignee
Bayrakci Tayyar Yuecel
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Application filed by Bayrakci Tayyar Yuecel filed Critical Bayrakci Tayyar Yuecel
Publication of WO2023161256A1 publication Critical patent/WO2023161256A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C2003/003—Shapes or dimensions of vortex chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C2003/006—Construction of elements by which the vortex flow is generated or degenerated

Definitions

  • the invention relates to a bluff body for a cocurrent cyclone separator, a bluff body arrangement which has at least two of the bluff bodies, and the cocurrent cyclone separator with the bluff body or the bluff body arrangement.
  • the cocurrent cyclone separator is used to separate particles from a dispersion containing the particles and a fluid.
  • a suspension is used as the dispersion.
  • filters are used, for example, in which the dispersion is passed through a membrane.
  • the particles are deposited on the membrane, which must be replaced after a certain period of time in order to avoid clogging.
  • cyclone separators also known as centrifugal separators.
  • the cyclone separators are designed either as countercurrent cyclone separators, also known as tangential cyclone separators, or as cocurrent cyclone separators, also known as axial separators.
  • volume forces in a swirl flow are, for example, centrifugal forces, magnetism and gravitational acceleration.
  • Fluid forces in a swirl flow are, for example, aerodynamic forces that are caused by a radial velocity gradient.
  • a buoyancy force acts on particles due to a gradient of the dynamic pressure. The particles thus receive a buoyancy in the direction of the faster flow components.
  • the dispersion In co-current cyclone separators, the dispersion is caused to rotate about an axis along the direction of movement of the dispersion. This movement is usually generated by means of guide vanes, which are arranged within a pipe section of the cocurrent cyclone separator, or by means of a tangentially introduced secondary flow.
  • the dispersion By means of the guide vanes or the secondary flow, the dispersion is additionally subjected to a speed in the tangential direction, with the maximum speed of the Dispersion, i.e. its absolute value, is essentially located in the middle between a pipe wall and the center of the pipe.
  • the particles are moved radially outwards, while the fluid is moved substantially in the center of the co-current cyclone separator. Since the maximum speed is not at the edge of the pipe section, a force acting on particles in the radial direction is reduced the further they move away from the area of the maximum speed, which is why only a few particles accumulate in the edge area.
  • the rotation of the dispersion leads to the formation of a Hamel-Oseen vortex, which essentially corresponds to a rigid-body vortex in the core area and then, radially on the outside, to a potential vortex in the direction of the pipe wall.
  • a Hamel-Oseen vortex which essentially corresponds to a rigid-body vortex in the core area and then, radially on the outside, to a potential vortex in the direction of the pipe wall.
  • there is an area with maximum absolute speed which can be considered as a sink with regard to the particles, and to which the particles, especially suspended matter particles or suspended matter, i.e. particles that have a similar density to water, are moved.
  • the DC cyclone separator can also be retrofitted into existing systems. Manufacturing costs of such a direct current cyclone separator are also reduced. In addition, there is only a comparatively small pressure loss, since it is not necessary to deflect the dispersion perpendicularly to the direction of movement. However, compared to the countercurrent cyclone separator, the efficiency of the cocurrent cyclone separator and the selectivity between the particles and the fluid are reduced. In particular, in the design as a co-current hydrocyclone, the separation rate is further reduced due to the essentially identical density of the particles and the fluid.
  • WO 2019/025617 A1 describes a cocurrent cyclone separator that at least partially solves these problems.
  • the DC cyclone separator is used to separate particles from a dispersion that contains the particles and a fluid.
  • the dispersion consists of the particles and the fluid.
  • the DC cyclone separator is an axial separator.
  • the DC cyclone separator is a centrifugal separator that is designed axially/unidirectionally.
  • the dispersion is passed through the co-current cyclone separator in a guiding direction, with the guiding direction in particular being used for the separation is not changed.
  • the direction of guidance is constant. In other words, the direction in which the dispersion or at least the fluid is directed is not changed.
  • the co-current cyclone separator comprises at least one tube section which is designed as a hollow cylinder and is used to direct the dispersion in the direction of guidance.
  • the dispersion is passed through the hollow-cylindrical tube section.
  • the guide direction is expediently at least in sections parallel to the axis of the hollow-cylindrical tube section.
  • the pipe section has an inner wall along which the dispersion is thus conducted during operation.
  • the hollow-cylindrical tube section preferably has an essentially circular cross-section.
  • at least a partial section of the hollow-cylindrical pipe section can be free of further components of the co-current cyclone separator, so that the dispersion can flow through it comparatively freely.
  • the section is located at the beginning of the pipe section in the direction of guidance.
  • the section that is free of other components can also be referred to as the first pipe section.
  • the inner wall of the pipe section has a notch, which is designed, for example, in the form of an internal thread.
  • the notch runs helically along the guiding direction.
  • a helix is formed by means of the notch, ie preferably a curve that winds around the jacket of a cylinder with a slope, the cylinder being provided in particular by means of the inner wall.
  • the notch winds around an axis of the hollow-cylindrical tube section.
  • at least the first pipe section has the notch over its entire length in the guide direction.
  • the indentation is used to generate a twist in the dispersion, so that after passing the indentation it has a velocity component tangential, i.e. perpendicular to the guiding direction.
  • the notch is the swirl generator.
  • the dispersion becomes a rotational motion in addition to the translational motion along the guiding direction staggered, with the rotational movement being perpendicular to the guiding direction.
  • the tangential velocity component is applied by means of the indentation to the layers of the dispersion moving along the inner wall, which due to viscosity or the like is transferred to the other areas of the dispersion located on the inside.
  • the dispersion has a velocity profile that is not constant.
  • the outer regions of the dispersion i.e. those that are close to the inner wall, especially in the area of the indentation, have the greatest velocity due to the indentation.
  • This velocity equals the velocity due to the dispersion being guided along the guiding direction plus the velocity applied due to the indentation.
  • the part of the dispersion that is essentially in the middle only has the velocity component in the direction of guidance. Due to the viscosity of the dispersion, the peripheral speed increases essentially linearly from the center of the pipe section to the inner wall, so that the rotational movement of the dispersion essentially corresponds to that of a solid body.
  • the particles are moved comparatively efficiently radially outwards to the inner wall of the pipe section due to the centrifugal force, in particular in connection with the fluid force, with the force acting on the particles increasing in the radial direction with decreasing distance from the inner wall.
  • the particles are moved more outward the further they are already outside, resulting in a sharp separation between the particles and the fluid in the dispersion.
  • the particles themselves move in particular along the helical path, which is predetermined due to the slope of the indentation. No moving parts are required to separate the particles from the dispersion, which reduces construction costs and reduces the susceptibility to errors. In addition, an efficiency is increased.
  • the particles themselves are enriched in an outer portion of the fluid and, together with this, reach a suitable separation chamber which is expediently downstream of the pipe section in terms of fluid technology.
  • the particles are thus completely, at least approximately completely or largely, removed from the dispersion in the form of a particle-containing fluid component.
  • the notch corresponds to a turn of an internal thread, which is realized by means of the notch.
  • the duct corresponds to the indentation, and the duct is formed in a helical shape along the guide direction, and the inner wall is thus indented to form the duct.
  • the pipe section particularly preferably has a number of indentations and, correspondingly, passages of this type.
  • the corresponding internal thread then has a corresponding number of turns, ie notches. This improves the generation of twist in the dispersion.
  • the passages are provided by means of the indentations, which for example have a substantially rectangular cross-section.
  • the indentations are rounded and the cross-section of each indentation may be handle-shaped and/or ear-shaped. Consequently, the hollow-cylindrical tube section essentially has a cross section that can be designed in the shape of a gear wheel or a saw blade.
  • the cross section can be designed in the manner of the cross section of a freewheel. Due to the curves, formation of undesired vortices, which would otherwise reduce efficiency, can be further reduced.
  • the pitch angle of the indentation can be constant. However, the pitch angle can also increase in the guiding direction. For example, the pitch angle starts at 0° and increases continuously, so that the formation of vortices is further avoided. As a result, the rotational speed of the dispersion around an axis along the guiding direction increases continuously, which further increases the efficiency.
  • the pitch angle is in particular the angle that the notch, in particular the corresponding passage, encloses with the guiding direction.
  • the slope angle is between 15° and 60° and increases for example between 15° and 60°, suitably continuously or exponentially.
  • a bluff body is arranged in the pipe section. This is in the middle of the Pipe section, ie positioned centrally within the pipe section and preferably on the axis of the pipe section.
  • a section of the pipe section in which the bluff body is arranged can also be referred to as the second pipe section.
  • the first and the second tube section are arranged coaxially to one another.
  • the second pipe section is directly adjacent to the first pipe section, and the first pipe section merges directly into the second pipe section.
  • the first pipe section is formed onto the second pipe section and is therefore in one piece, in particular monolithic, with the latter.
  • the pipe section can therefore be designed in one piece overall, with the first and second pipe sections differing in that the first pipe section is free of the bluff body and that the bluff body is arranged in the second pipe section.
  • the second pipe section preferably has a substantially round cross section.
  • the second pipe section On the side facing the first pipe section, the second pipe section has the same internal diameter as the first pipe section, thereby avoiding turbulence of the dispersion or the fluid during the transition from the first pipe section to the second pipe section.
  • the dispersion or at least the fluid and the particles separated from it are passed through the second pipe section coming from the first pipe section in the guide direction during operation of the co-current cyclone separator.
  • the inner wall of the second pipe section can also have a helical notch, for example in sections or completely, with the notch of the first pipe section merging directly into the notch of the second pipe section.
  • the notches, or the turns of the internal thread are aligned with one another.
  • the pitch angle of the indentation of the first tube section at the transition is equal to the pitch angle of the indentation of the second tube section.
  • the inner wall of the second tube section can be designed to be flat, ie without indentations, at least in sections.
  • the bluff body is rotationally and/or rotationally symmetrical with respect to the axis of the second pipe section.
  • the bluff body is flow-optimized. In this way, a fluidic resistance of the bluff body is reduced, and Turbulence is avoided.
  • Guide vanes running radially outwards are connected to the bluff body.
  • the profile of the guide vanes has at least one component in the radial direction.
  • the guide vanes run between the bluff body and the inner wall of the pipe section, ie at least in sections radially and outwards with respect to the bluff body.
  • the guide vanes run at least partially tangentially and are designed to be curved in a spiral shape.
  • the vanes are spaced from the inner wall of the tubular.
  • the radially outer part of the dispersion is only slightly influenced by the guide vanes. Due to the distance between the guide vanes and the inner wall of the second pipe section, the rotational movement of the dispersion is maintained, so that after passing through the bluff body and the guide vanes, it also continues to exhibit the rotational movement. In particular, the guide vanes ensure that the swirl is maintained. The distance of the vanes from the outer wall has the particular effect that the absolute speed of the swirl flow at the outer wall is maintained.
  • the bluff body with the attached guide vanes causes an amplification/increase of the radial velocity gradient.
  • the particles receive a radially outward buoyancy and are accelerated in the direction of the inner wall of the pipe section.
  • the increased centrifugal force and/or the fluid force acts on the particles moving radially outwards, which is why particles still present in the fluid after the tube section are also separated on the inner wall of the second tube section.
  • After passing through the bluff body it is mainly the outer areas of the dispersion that contain the particles.
  • the inner areas of the dispersion on the other hand, mainly contain the fluid.
  • the direct current cyclone separator has a relatively high degree of efficiency.
  • the invention is based on the object of providing a bluff body for a cocurrent cyclone separator which contributes to a particularly high degree of efficiency of the cocurrent cyclone separator.
  • the invention is also based on the object of providing a bluff body arrangement for a cocurrent cyclone separator which has at least two bluff bodies and which contributes to a particularly high degree of efficiency of the cocurrent cyclone separator.
  • the invention is also based on the object of providing a direct-current cyclone separator which has a particularly high level of efficiency.
  • a bluff body for a cocurrent cyclone separator has: a base body to be arranged in a hollow-cylindrical tube section of the direct current cyclone separator, so that an axis of the base body lies on an axis of the tube section; and at least one vane extending radially outwardly from the body and formed to have a radially and axially extending portion of an imaginary helical surface whose axis corresponds to the axis of the body.
  • the cocurrent cyclone separator is used to separate particles from a dispersion containing the particles and a fluid.
  • the pipe section in particular a first section of the pipe section, which can be referred to as the first pipe section and which is preferably free of other components of the cocurrent cyclone separator, for example the bluff body, is used to set the dispersion in rotation, so that the dispersion has a twist , which can essentially correspond to a solid body rotation when it hits the bluff body.
  • the pipe section in particular the first Pipe section having an inner wall with one, two or more helical indentations.
  • the bluff body can be arranged in a pipe section adjoining the first pipe section in the guiding direction, for example referred to as the second pipe section.
  • the second pipe section can also have an inner wall with one, two or more helical indentations, which preferably merge flush and/or in alignment with the corresponding helical indentations of the first pipe section.
  • the purpose of the bluff body is to generate a particularly high velocity gradient in the radial direction in the dispersion and to introduce the least possible disturbances and/or turbulence into the dispersion.
  • the bluff body has the effect, in particular, that the dispersion on the base body is greatly slowed down, with this braking effect decreasing radially outwards, so that the high speed gradient is imposed on the dispersion in the radial direction.
  • the base body can be designed, for example, in the shape of a cylinder or a truncated cone.
  • the base body can, for example, be designed to be rotationally symmetrical, with the axis of the base body being able to be the corresponding axis of symmetry.
  • the bluff body and/or the guide vanes can, for example, have plastic or be formed from it.
  • the bluff body preferably has two, three or more guide vanes.
  • the bluff body can have between 3 guide vanes and 20 guide vanes, for example between 4 guide vanes and 8 guide vanes.
  • the bluff body can, for example, have so many vanes that the number of vanes is equal to or greater than the number of indentations in the pipe section.
  • the plurality of guide vanes can be arranged equidistantly from one another, for example. Each of the vanes may then have a portion of a corresponding helical surface.
  • the bluff body can, for example, be stationary, in particular non-rotatably, be arranged in the pipe section with respect to the pipe section.
  • the bluff body and the guide vanes can be designed in one piece (monolithic).
  • the imaginary helical surface can have a helical outer edge, for example, with the helical surface extending from the helical outer edge to the axis of the base body, to a lateral surface of the base body or to a helical inner edge of the helical surface.
  • the helical inner edge can lie, for example, on the lateral surface of the base body.
  • the helical surface in particular its partial section, serves to construct and technically accurately describe the guide vane, in particular the shape of the guide vane.
  • the guide vane is designed in such a way that one side of the guide vane corresponds to the partial section of the imaginary helical surface.
  • the guide vane can lie, for example, on the imaginary helical surface, in particular completely.
  • the side of the vane that corresponds to the portion of the imaginary helical surface is concave. Since the vane rests on the helical surface and the helical surface naturally has a concave side and a convex side, the vane also has a concave side and a convex side.
  • the guide vane is designed in such a way that when the bluff body is arranged as intended, a pitch angle of at least one outer edge of the helical surface increases in a guiding direction of the cocurrent cyclone separator.
  • a pitch angle of the helical surface can increase in the guiding direction.
  • a helix angle of the vane in the vane direction may increase.
  • the guiding direction corresponds to the direction in which a fluid to be filtered flows through the pipe section during operation of the co-current cyclone separator.
  • the outer edge of the helical surface can also be helical.
  • the inner edge of the helical surface can also be helical.
  • the helical inner edge and the helical outer edge can span the helical surface between them.
  • the bluff body is arranged as intended when it is arranged in the pipe section, in particular in a second pipe section, of the direct current cyclone separator.
  • the guide vane is designed in such a way that when the bluff body is arranged as intended, a rear end of the guide vane lies behind a rear base surface of the base body in the guide direction.
  • the guide vanes can protrude at least partially beyond the base body in the guide direction.
  • an inflow edge of the guide vane which extends outwards from the base body and onto which the fluid flows as the first part of the guide vane when the bluff body is used as intended, has an inflow angle of between 10° and 60°.
  • the angle of attack is between 20° and 50°, for example approximately 45°. This ensures that no particles from the dispersion are deposited on the leading edge.
  • the guide vane is designed in such a way that an axial length of the guide vane steadily decreases in the radial direction.
  • an area of the guide vane over which the fluid flows in the guide direction becomes smaller as the distance from the axis increases.
  • the dispersion on the inner wall essentially maintains the initial velocity prevailing when it exits the first pipe section, and the dispersion also continues to exhibit essentially a rotational motion, which corresponds to that of a solid body. In this way, separation of the particles from the fluid is further improved.
  • the axial length of the vane is parallel to the axis of the bluff body.
  • the axial length of the entire bluff body can correspond, for example, to between a quarter of the diameter and ten times the diameter of the pipe section, for example between a half and five times the diameter of the pipe section, in particular of the second pipe section of the DC cyclone separator.
  • the guide vane is designed such that, with the same radial distance from the axis of the bluff body, an axial length of a convex side of the guide vane is longer than an axial length of a concave side of the guide vane.
  • the twist is maintained better and the speed gradients can be better used.
  • the guide vane is designed in such a way that an axially extending profile of the guide vane is designed in the shape of an airfoil or teardrop. This causes the particles to move faster over the convex side than over the concave side. This has the effect that the guide vanes are flow-optimized and turbulence behind a guide vane is reduced. In addition, the twist is maintained better and the speed gradients can be better used.
  • the bluff body has a conical inflow body which is arranged flush on the base body on a front base surface of the base body, which is directed counter to the guide direction when the bluff body is used as intended, and whose cone tip is directed counter to the guide direction.
  • One object of the invention is achieved by a bluff body arrangement having at least two of the bluff bodies explained above, the bluff bodies being arranged one behind the other in the axial direction and their axes lying on top of one another.
  • a maximum outer diameter of the bluff bodies becomes smaller in the guide direction.
  • a bluff body on which the fluid flows first can have a larger diameter than a bluff body on which the fluid flows afterwards.
  • One object of the invention is achieved by the co-current cyclone separator for separating particles from the dispersion containing the particles and the fluid, having at least the hollow-cylindrical tube section for conducting the dispersion in the direction of guidance; and at least one of the bluff bodies explained above or the bluff body arrangement explained above.
  • the tube section may include the first and second tube sections.
  • the bluff body or the bluff body arrangement can be arranged in the second pipe section.
  • the inner wall of the tube section has the helical notch which winds around the inner wall.
  • the bluff body is designed and arranged in the pipe section in such a way that an outer edge of the imaginary helical surface runs parallel to the helix formed by the indentation.
  • the helix formed by the notch can lie on the imaginary helical surface if the imaginary helical surface is enlarged, for example extrapolated, in the radial direction up to the notch.
  • Due to the helical indentation the dispersion is set in rotation as it flows through the pipe section. The particles then move in the guiding direction along helical paths which run essentially parallel to the helical indentation, at least at the end of the first tube section.
  • the bluff body is designed and arranged in the pipe section in such a way that the outer edge of the imaginary helical surface runs parallel to the helix formed by the notch. In this way, the bluff body maintains the rotation, preferably with minimal vortex formation, and at the same time increases the radial velocity gradient. If the direct current cyclone separator has the bluff body arrangement, ie two or more of the bluff bodies, then all of the bluff bodies can be arranged and designed accordingly.
  • the indentation in the tube section is formed in such a way that the corresponding helix winds around the inner wall with a pitch and that a pitch angle of the helix increases in the guiding direction
  • the bluff body is formed in such a way that a pitch of the outer edge of the helical surface increases to the same extent as the pitch of the helix formed by the indentation.
  • the increasing slope of the notch causes an increase in the rotational speed of the dispersion.
  • the increasing gradient of the outer edge of the helical surface supports this increase in rotational speed and since the gradient angles and accordingly the increases in speed occur to the same extent, in other words correspondingly, no or only negligible turbulence occurs in the dispersion.
  • the pipe section has two or more of the indentations, the indentations running parallel to one another, and the bluff body has so many guide vanes that a number of guide vanes corresponds to a number of indentations.
  • the multiple indentations together can also be understood as a type of internal thread with a corresponding number of turns, each turn of the internal thread corresponding to one of the indentations.
  • FIG. 1 shows a sectional side view of an embodiment of a direct current cyclone separator with a bluff body
  • Figure 2 is a perspective view of the bluff body of Figure 1 and an imaginary helical surface
  • FIG. 3 shows a detailed side view of the bluff body from FIG. 1;
  • Fig. 4 is a perspective view of an embodiment of a bluff body and an imaginary helical surface
  • FIG. 5 shows a perspective, partially sectioned detailed view of the bluff body from figure 4.
  • Fig. 6 is a perspective view of an embodiment of a bluff body and an imaginary helical surface
  • FIG. 7 shows a side view of an exemplary embodiment of a bluff body arrangement.
  • FIG. 1 shows a sectional side view of an exemplary embodiment of a direct current cyclone separator 4 with a bluff body 44.
  • Figure 1 shows a schematically simplified view of the direct current cyclone separator 4 in a section along an axis 2.
  • the axis 2 can, for example, be a longitudinal axis or an axis of symmetry of the direct current cyclone separator 4.
  • the direct current cyclone separator 4 serves to remove particles 10 from a dispersion 6, in particular to separate them. For this purpose, the dispersion is passed through the direct current cyclone separator 4 in a guiding direction 34 .
  • the dispersion 6 has a fluid 8 and the particles 10, for example.
  • the fluid can be, for example, a compressible fluid, such as a gas, or an incompressible fluid, such as a liquid.
  • the dispersion 6 can be a suspension.
  • the fluid 8 can be water, for example.
  • the water can be taken from a flowing body of water or from the sea, for example.
  • the fluid 8 can be used, for example, as cooling water in an industrial plant or as process water in mining.
  • the fluid 8 can be fed to a desalination plant and the dispersion 6 can be seawater in which the particles 10 are present.
  • the direct-current cyclone separator 4 can be connected upstream of a seawater desalination plant, for example, and the dispersion 6 can be taken from the sea, in which case the fluid 8 is the saltwater from the sea.
  • the particles 10 can include or be, for example, grains of sand or other very small particles, such as microplastics.
  • a density of the particles 10 and a density of the fluid 8 can be essentially the same, for example.
  • a The ratio of the densities can, for example, be equal to 1 or at least between 0.95 and 1.05 or between 0.99 and 1.01 or between 0.995 and 1.005.
  • the particles 10 can have a size of 1 nm to 1 ⁇ m or larger than 1 ⁇ m, for example.
  • the particles 10 have a particle size between 0.1 mm and 1 mm or larger.
  • the particles 10 can consist, for example, of a single substance or of different substances or elements.
  • the particles are heterogeneous.
  • sand can form at least part of the particles 10 .
  • the direct current cyclone separator 4 has a hollow-cylindrical tube section.
  • the pipe section can have, for example, a first pipe section 12 and a second pipe section 14 connected downstream in terms of fluid technology.
  • the second pipe section 14 is formed onto the first pipe section 12 and is arranged coaxially to the pipe section 12 .
  • An inner diameter of the first pipe section 12 can, for example, be constant and/or equal to an inner diameter of the second pipe section 14 on the side facing the first pipe section 12 .
  • the second pipe section 14 can be widened, so that its inner diameter increases in the guiding direction 34 .
  • a separation chamber 16 can be connected downstream of the second pipe section 14 in terms of fluid technology, which chamber is therefore also connected downstream of the first pipe section 12 in terms of fluid technology.
  • the separation chamber 16 can have a collection chamber 18 with a guide tube 20 which is formed onto the second tube section 14 on the side opposite the first tube section 12 .
  • the second pipe section 14 can be increasingly widened as the distance from the first pipe section 12 increases.
  • the guide tube 20 can also be increasingly widened as the distance from the first tube section 12 increases.
  • An inside diameter of the guide tube 20 on the side facing the second tube section 14 can be the same as the inside diameter of the second tube section 14 .
  • the guide tube 20 can be arranged coaxially to the second tube section 14 so that an axis of the guide tube 20 corresponds to the axis 2 .
  • a dip tube 22 can be arranged, the inner diameter of which is smaller on the side of the tube section 12, 14 than the inner diameter of the first Pipe section 12 and thus also smaller than the inner diameter of the second pipe section 14 is.
  • the inner diameter of the dip tube 22 can be increasingly widened as the distance from the first tube section 12 increases.
  • a length of the immersion tube 22 over which it is widened can correspond to a length of the guide tube 20 .
  • the dip tube 22 can be widened in an area within which it is located in the guide tube 20 .
  • a circumferential gap 24 can be formed between the guide tube 20 and the immersion tube 22 , the cross-sectional area of which increases steadily/exponentially in the direction away from the tube section 12 .
  • An overall length of the dip tube 22 can be greater than the length of the guide tube 20 .
  • a partition wall 26 for delimiting the collecting chamber 18 can be arranged on the guide tube 20 at a distance from the guide tube 20, for example formed thereon.
  • the immersion tube 22 can be surrounded by the collecting chamber 18 at least in sections.
  • the tip of a conically designed dynamic pressure body 28 can project into the immersion tube 22 from the side facing away from the first tube section 12 .
  • the dynamic pressure body 28 can also be arranged coaxially to the longitudinal axis 2 .
  • a circumferential slot 30 can be formed between the dynamic pressure body 28 and the immersion tube 22 .
  • the pipe section 12, 14 has an inner wall which forms a delimitation of the pipe section 12, 14 in the radial direction.
  • the first pipe section 12 has a first inner wall 32 .
  • the pipe section 12, 14 can be free of other components of the direct current cyclone separator 4 in the area of the first pipe section 12, so that the first pipe section 12 during operation of the dispersion 6 in the guiding direction 34, which is parallel to the longitudinal axis 2 and from the first pipe section 12 in the direction the deposition chamber 16 is directed, can be flowed through essentially freely.
  • the first inner wall 32 has at least one, preferably two or more, helical indentations 36 .
  • the indentations 36 each form a helix that winds around the axis 2 .
  • Each of the notches 36 can be in the form of an internal thread, in particular a turn of the internal thread, in the first inner wall 32 may be formed.
  • the notches 36 can form a multiple internal thread, the turns of the internal thread corresponding to the notches 32 .
  • a pitch angle 40 is formed in each case between the notches 36 and the guiding direction 34 .
  • the pitch angle 40 of the notches 36 can be the same in any cross section perpendicular to the longitudinal direction 2 .
  • the indentations 36 can run at a constant tangential distance and/or parallel to one another.
  • the pitch angles 40 can increase in the guiding direction 34 .
  • the notches 36 can have an angle of 15° in the guiding direction 34 at the beginning of the first pipe section 12 .
  • the notches 36 can have a pitch angle 40 of 45°.
  • the pitch angle 40 can increase further.
  • the increase in the pitch angle 40 can be linear or exponential, for example.
  • each of the indentations 36 can form an upset helix, in other words 'spiral'.
  • the second pipe section 14 has a second inner wall 41 .
  • a bluff body 46 is arranged in the second pipe section 14 .
  • the first pipe section 12 indicates that it is at least essentially free of the bluff body 46
  • the second pipe section 14 indicates that it has the bluff body 46.
  • the two pipe sections 12, 14 can only differ in that the bluff body 46 is arranged in the second pipe section 14 and not in the first pipe section 12.
  • the second pipe section 14 can have the indentation(s) 36 which can optionally continue continuously and/or steadily from the first pipe section 12 to the second pipe section 14 .
  • the pitch angle 40 of the indentation(s) 46 in the second pipe section 14 may be constant or may continue to increase.
  • the bluff body 44 can, for example, be arranged centrally within the second pipe section 14 .
  • the bluff body 44 can be rotationally symmetrical, for example be trained.
  • An axis of the bluff body 44 can correspond to the axis 2 of the direct current cyclone separator 4, for example.
  • the bluff body 44 can thus be configured and/or arranged rotationally symmetrically with respect to the axis 2 .
  • the bluff body 44 has at least one, preferably two or more, for example twelve, radially outwardly extending guide vanes 46, only two of which are shown in FIG.
  • the dispersion 6 is introduced into the pipe section 12 in the guide direction 34 through an inlet opening 48 , which is located on a side of the first pipe section 12 facing away from the second pipe section 14 .
  • the dispersion 6 essentially only has a velocity component in the guiding direction 34 . Due to the notch(s) 36, the dispersion in the region of the first pipe section 12 is set in a rotational movement about the axis 2. Because of the viscosity of the dispersion 6 , this velocity component is also transmitted to regions of the dispersion 6 which are at a distance from the first inner wall 32 of the first pipe section 12 .
  • a velocity component of the dispersion 6 perpendicular to the guiding direction 34 is greater, the closer the dispersion 6 is to the first inner wall 32 .
  • the magnitude of the speed is proportional to the distance from the axis 2, which is why the dispersion 6 also has a rotational movement, which is directed about the axis 2, in addition to the translational movement in the guiding direction 34.
  • a speed gradient is formed in the dispersion 6 in the radial direction.
  • An axis of rotation of the dispersion 6 can correspond to the axis 2 . Consequently, the dispersion 6 can behave like a solid body in which, during a rotational movement, the velocity component in the tangential direction increases linearly with the distance from the axis of rotation.
  • the rotational speed of the dispersion 6 can increase as the penetration into the first pipe section 12 increases due to the increasing pitch angle 40 . Due to the centrifugal force (volume force) caused by the rotation, which is caused by the speed gradient, the particles 10 are moved radially outwards. After passing through the first pipe section 12, the dispersion 10 hits the bluff body 44 in the second pipe section 14, the dispersion 6 being decelerated in the middle due to the bluff body 44 and being displaced outwards in the radial direction. The rotational movement of the dispersion 6 can be maintained here by means of the guide vanes 46 and optionally by means of the notch(s) 36 in the second inner wall 41 of the second pipe section 14 .
  • the particles 10 receive a radially outward buoyancy and accumulate near the inner wall 41 of the pipe section 12 .
  • a distance of the majority of the particles 10 to the axis 2 is therefore greater than a radius of the opening of the immersion tube 22, which is why the particles 10 get into the gap 24 and thus into the collecting chamber 18.
  • the fluid 8 deprived of the particles 10 and low in particles is located further inwards in the direction of the axis 2 with respect to the inner wall 41 of the second tube section 14 and enters the immersion tube 22 .
  • Fig. 2 shows a perspective view of the bluff body 44 from Figure 1 and an imaginary helix-shaped surface 60.
  • the bluff body 44 has a base body 54 for arrangement in the pipe section 12, 14, in particular the second pipe section 12, of the direct current cyclone separator 4, in this way , that an axis of the base body 54 lies on an axis of the second pipe section 12 .
  • the base body 54 can be configured, for example, in the shape of a cylinder or a truncated cone.
  • the base body 54 can, for example, be rotationally symmetrical, with the axis of the base body 54 being the corresponding axis of symmetry.
  • the bluff body 44 also has at least one, preferably two or more, for example six or twelve guide vanes 46, each of which extends radially outwards from the base body 54.
  • the bluff body 44 can have, for example, so many guide vanes 46 that a number of guide vanes 46 corresponds to a number of indentations 36 in the pipe section 12, 14. Alternatively, the number of vanes 46 may be greater than the number of indentations 36 .
  • the guide vanes 46 can then be configured and arranged, for example, such that helical outer edges 66 of the guide vanes 46 run parallel to the corresponding indentations 36 and/or such that the indentations 36 lie on radial extensions of the helical surfaces 60 of the corresponding guide vanes 46 .
  • the bluff body 44 and/or the guide vanes 46 can include or be formed from plastic, for example.
  • the bluff body 44 and/or the guide vanes 46 can be formed in one piece (monolithic), for example
  • the guide vanes 46 are designed in such a way that they each have a radially and axially extending section 88 (see FIG. 5) of the imaginary helical surface 60, the axis of which corresponds to the axis of the base body 54 and the axis 2 of the DC cyclone separator 4.
  • the bluff body 44 can have a conical inflow body 56, which is arranged flush on the base body 54 and its cone tip on a front base surface 90 (see Figure 6) of the base body 54, which is directed counter to the guiding direction 34 when the bluff body 44 is used as intended is directed against the guiding direction 34 .
  • the plurality of guide vanes 46 can, for example, be arranged equidistantly from one another on the base body 54 .
  • Each of the vanes 46 can be constructed using a corresponding helical surface 60 .
  • Each of the vanes 46 may have a portion 88 (see FIG. 5) of a corresponding helical surface 60.
  • the bluff body 44 can, for example, be arranged in a stationary manner, in particular non-rotatably, with respect to the pipe section 12, 14 in the second pipe section 14.
  • the bluff body 44 and the vanes 46 can be formed in one piece (monolithic).
  • the imaginary helical surface 60 can have, for example, the helical outer edge 66, with the helical surface 60 extending from the helical outer edge 66 to the axis of the base body 54, to a lateral surface of the base body 54 or to a helical inner edge 68 of the helical surface 60 may extend.
  • the helical inner edge 68 can lie on the lateral surface of the base body 54, for example.
  • the helical surface 60, particularly portion 88 thereof, is used to design and technically accurately describe the vane 46, particularly the shape of the vane 46. Once the vane 46 is designed, the imaginary helical surface 60 is no longer needed and the vane 46 can be modified accordingly getting produced.
  • the guide vane 46 can be designed in such a way that when the bluff body 44 is arranged as intended, a pitch angle of at least the helical outer edge 66 of the helical surface 60 increases in the guide direction 34 of the direct current cyclone separator 4 .
  • a pitch angle of the helical surface 60 in the guiding direction 34 can increase.
  • a pitch angle of the guide vane 46 in the guide direction 34 can also increase.
  • the bluff body 44 is arranged as intended when it is installed in the pipe section 12, 14, in particular in the second pipe section 14, of the
  • DC cyclone separator 4 is arranged, for example as shown in FIG.
  • DC cyclone separator 4 has the helical indentation 36 which winds around the inner wall 32,41.
  • the bluff body 44 can be designed and arranged in the second pipe section 14 in such a way that the helical outer edge 66 of the imaginary helical surface 60 runs parallel to the helix formed by the notch 36 .
  • the helix formed by the indentation 36 can lie on the imaginary helical surface 60 if the imaginary helical surface 60 is enlarged, for example extrapolated, in the radial direction up to the indentation 36 .
  • the direct-current cyclone separator 4 has a bluff body arrangement with a plurality of bluff bodies 44, that is to say two or more of the bluff bodies 44, then all of the bluff bodies 44 can be arranged and configured accordingly.
  • the Bluff body 44 may be formed so that a slope of the helical outer edge 66 of the helical surface 60 increases to the same extent as the slope of the helix formed by the notch 36.
  • the bluff body 44 can have so many guide vanes 46 that a number of guide vanes 46 corresponds to a number of indentations 36. Alternatively, the number of vanes 46 may be greater than the number of indentations 36 .
  • the multiple notches 36 together can also be understood as a type of internal thread with a corresponding number of turns, each turn of the internal thread corresponding to one of the notches 36 .
  • FIG. 3 shows a detailed side view of the bluff body 44 from FIG. It can be seen from FIG. 3 that the bluff body 44, in particular the guide vane 46, has an inflow edge 76 on the guide vane 46.
  • the leading edge 76 extends outwardly from the base 54 .
  • the fluid 8 flows against the leading edge 76 as the first part of the guide vane 46 .
  • the leading edge 76 can enclose an inflow angle 78 with the axis 2, for example between 10° and 60°, for example between 20° and 50°, for example of approximately 45°.
  • the guide vane 46 can be formed in such a way that an axial length L1, L2 of the guide vane 46 decreases steadily in the radial direction.
  • a first length L1 can always be longer than a second length L2 if the lengths L1, L2 are measured parallel to the axis 2 and the first length L1 is measured closer to the axis 2 than the second length L2.
  • an area of the guide vane 46 over which the fluid 8 flows in the guide direction 34 becomes smaller as the distance from the axis 2 increases.
  • An axial length of the entire bluff body 44 can correspond, for example, to between half a diameter and ten times the diameter of the pipe section 12, 14, for example between a quarter of the diameter and five times the diameter of the pipe section 12, 14, in particular of the first pipe section 12.
  • the vane can be designed so that when intended arranged baffle 44 is a rear end 58 of the guide vane 46 in the guiding direction 34 behind a rear base surface 84 of the base body 54.
  • the guide vanes 46 can protrude at least partially beyond the base body 54 in the guide direction 34 .
  • the guide vanes 46 can have an outer spherical segment section 80 adjoining the leading edge 76 in the direction away from the base body 54 .
  • the outer spherical segment section 80 is formed in the shape of a spherical segment. In other words, an edge of the guide vanes 46 in the outer spherical segment section 80 can run along an imaginary spherical surface.
  • the guide vanes 46 can have an inner spherical segment section 82 in the direction away from the base body 54 on an edge facing away from the leading edge 76 .
  • the inner spherical segment portion 82 is formed in the shape of a spherical segment.
  • an edge of the guide vanes 46 in the inner spherical segment portion 82 can run along an imaginary spherical surface.
  • the inner spherical segment portions 82 of all vanes 46 may form a bowl and/or lie on the surface of the same imaginary sphere.
  • Fig. 4 shows a perspective view of an embodiment of a bluff body 44 for the DC cyclone separator 4 and an imaginary helical surface 60.
  • FIG. 5 shows a perspective, partially sectioned detailed view of the bluff body from FIG.
  • the bluff body 44 shown in FIGS. 4 and 5 can, for example, largely correspond to the bluff body 44 explained above. Therefore, only those features of the bluff body 44 are explained below, with respect to which the bluff body 44 shown in FIGS. 4 and 5 differs from the bluff body 44 explained above.
  • the guide vanes 46 can be designed in such a way that an axially extending profile of the guide vanes 46 is in the form of an airfoil or teardrop (see the section surface of the guide vane 46 in FIG. 5).
  • the guide vanes 46 can be designed in such a way that with the same radial distance from the axis of the bluff body 44, an axial length of a convex side 74 of the guide vane 46 is longer than an axial length of a concave side 72 of the vane. This means that the path for the dispersion in the guide direction 34, i.e. in the axial direction, is longer along the convex side 74 of the guide vane 46 than along the concave side 72 of the guide vane 46.
  • the guide vanes 46 can be designed in such a way that one side of the Guide vanes 46 the section 88 of the imaginary helical surface 60 corresponds.
  • the guide vane 46 can lie, for example, on the imaginary helical surface 60, in particular completely.
  • the concave sides 72 of the vanes 46 can correspond to the respective sections 88 .
  • FIG. 6 shows a perspective view of an exemplary embodiment of a bluff body 44 and an imaginary helical surface 60.
  • the bluff body 44 shown in FIG. 6 can, for example, largely correspond to the bluff body 44 explained with reference to FIG.
  • FIG. 6 shows the bluff body 44 without the inflow body 56, so that the front base surface 90 of the base body 54, on which the inflow body 56 can be arranged, is exposed and visible.
  • the bluff body arrangement has at least two, optionally three or more of the bluff bodies 44 explained above.
  • the bluff bodies 44 are arranged one behind the other in the axial direction and their axes lie on top of one another. Only the bluff body 44 arranged first in the guiding direction 34 has the inflow body 56 .
  • the bluff bodies 44 can have the same number of guide vanes 46 or a different number of guide vanes 46 .
  • the first bluff body 44 in the guide direction 34 can have six guide vanes 46 and all following bluff bodies 44 can have twelve guide vanes 46, with other combinations of different numbers of guide vanes 46 also being able to be used.
  • the maximum outer diameters of the two bluff bodies 44 are the same, that is to say constant along the bluff body arrangement.
  • the bluff bodies 44 can be designed such that when the bluff bodies 44 are arranged as intended in the direct current cyclone separator 4, the maximum outer diameter of the bluff bodies 44 in the guide direction 34 becomes larger. This means, for example, that the bluff body 44 against which the fluid 8 flows first, in FIG. 7 the upper bluff body 44, can have a smaller diameter than the bluff body 44 against which the flow then flows, in Figure 7 the lower bluff body 44.

Landscapes

  • Cyclones (AREA)

Abstract

Un corps de retenue (44) pour un séparateur à cyclone à courant continu (4) est prévu. Le corps de retenue (44) comprend : un corps de base (54) destiné à être disposé dans un tronçon de tube (12, 14) cylindrique creux du séparateur à cyclone à courant continu (4), de sorte qu'un axe du corps de base (54) se trouve sur un axe (2) du tronçon de tube (12, 14) ; et au moins une aube directrice (46) qui s'étend radialement vers l'extérieur à partir du corps de base (54) et qui est conçue de manière à présenter un tronçon partiel (88) s'étendant radialement et axialement d'une surface hélicoïdale imaginaire (60) dont l'axe correspond à l'axe du corps de base (54).
PCT/EP2023/054382 2022-02-25 2023-02-22 Corps de retenue, agencement de corps de retenue et séparateur à cyclone à courant continu WO2023161256A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022104631.1A DE102022104631B4 (de) 2022-02-25 2022-02-25 Gleichstromzyklonabscheider
DE102022104631.1 2022-02-25

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WO2023161256A1 true WO2023161256A1 (fr) 2023-08-31

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2818791A1 (de) * 1977-05-05 1978-11-16 Donaldson Co Inc Wirbelrohr fuer zyklonabscheider
EP0019057A1 (fr) * 1979-05-10 1980-11-26 Klöckner-Humboldt-Deutz Aktiengesellschaft Epurateur de poussière du type à tourbillonnement à plusieurs étages
DE3228038A1 (de) * 1981-06-22 1984-02-02 Trw Inc Fluessigkeit/gas-abscheider
WO2008039491A2 (fr) * 2006-09-26 2008-04-03 Dresser-Rand Company Dispositif de séparation de fluides statique amélioré
DE102010033955A1 (de) * 2010-08-10 2012-02-16 Thyssenkrupp Presta Teccenter Ag Hohlkörper mit integrierter Ölabscheideeinrichtung
WO2017036970A1 (fr) * 2015-08-28 2017-03-09 Fjords Processing As Dispositif de désembuage à écoulement axial
WO2019025617A1 (fr) 2017-08-04 2019-02-07 Tayyar Bayrakci Cyclone dépoussiéreur à courant continu
DE102017220701A1 (de) * 2017-11-20 2019-05-23 BSH Hausgeräte GmbH Fliehkraftabscheider mit zentrischer Zuführung der zu reinigenden Luft

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT189173B (de) 1955-05-27 1957-03-11 Rudolf Dipl Ing Jahn Fliehkraftabscheider für Staub, Nebel und Flüssigkeiten aller Art
GB1310792A (en) 1970-04-24 1973-03-21 Pall Corp Vortex separator
US3693329A (en) 1970-08-24 1972-09-26 Porta Test Mfg Hub assembly for in-line centrifugal separator
DE19719555A1 (de) 1997-05-09 1998-11-12 Kevin Business Corp Verfahren und Vorrichtung zum Ausscheiden von Gas aus gashaltigem Blut

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2818791A1 (de) * 1977-05-05 1978-11-16 Donaldson Co Inc Wirbelrohr fuer zyklonabscheider
EP0019057A1 (fr) * 1979-05-10 1980-11-26 Klöckner-Humboldt-Deutz Aktiengesellschaft Epurateur de poussière du type à tourbillonnement à plusieurs étages
DE3228038A1 (de) * 1981-06-22 1984-02-02 Trw Inc Fluessigkeit/gas-abscheider
WO2008039491A2 (fr) * 2006-09-26 2008-04-03 Dresser-Rand Company Dispositif de séparation de fluides statique amélioré
DE102010033955A1 (de) * 2010-08-10 2012-02-16 Thyssenkrupp Presta Teccenter Ag Hohlkörper mit integrierter Ölabscheideeinrichtung
WO2017036970A1 (fr) * 2015-08-28 2017-03-09 Fjords Processing As Dispositif de désembuage à écoulement axial
WO2019025617A1 (fr) 2017-08-04 2019-02-07 Tayyar Bayrakci Cyclone dépoussiéreur à courant continu
DE102017220701A1 (de) * 2017-11-20 2019-05-23 BSH Hausgeräte GmbH Fliehkraftabscheider mit zentrischer Zuführung der zu reinigenden Luft

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DE102022104631B4 (de) 2024-05-23

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