WO2021079648A1 - 分離装置及び分離システム - Google Patents

分離装置及び分離システム Download PDF

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Publication number
WO2021079648A1
WO2021079648A1 PCT/JP2020/034557 JP2020034557W WO2021079648A1 WO 2021079648 A1 WO2021079648 A1 WO 2021079648A1 JP 2020034557 W JP2020034557 W JP 2020034557W WO 2021079648 A1 WO2021079648 A1 WO 2021079648A1
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WIPO (PCT)
Prior art keywords
casing
rotating body
separation device
separation
blades
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2020/034557
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English (en)
French (fr)
Japanese (ja)
Inventor
将大 鶴居
早崎　嘉城
將有 鎌倉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to US17/769,976 priority Critical patent/US12257537B2/en
Priority to JP2021554154A priority patent/JP7557840B2/ja
Priority to EP20879017.0A priority patent/EP4049739B1/en
Publication of WO2021079648A1 publication Critical patent/WO2021079648A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B04B2005/125—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers the rotors comprising separating walls

Definitions

  • the present invention relates to a separation device and a separation system, and more particularly to a separation device for separating a solid contained in a gas from a gas, and a separation system including the separation device.
  • Patent Document 1 describes a separating device including an outer cylinder, a rotating body, and a blade.
  • the outer cylinder has a gas inlet at the first end and a gas outlet at the second end.
  • the rotating body is arranged inside the outer cylinder so that the rotation center axis of the rotating body is aligned with the center axis of the outer cylinder.
  • the plurality of blades are arranged apart from each other in the outer peripheral direction of the rotating body between the rotating body and the outer cylinder body.
  • a plurality of blades are connected to a rotating body.
  • the outer cylinder has a discharge hole connecting the inside and outside of the outer cylinder between the first end and the second end.
  • the separation performance for separating a solid from a gas may deteriorate depending on the particle size of the solid to be separated.
  • An object of the present disclosure is to provide a separation device and a separation system capable of improving the separation performance for separating a solid contained in a gas from the gas.
  • the separation device includes a casing, a rotating body, and blades.
  • the casing has a gas inlet, a gas outlet, and a solid outlet.
  • the rotating body is arranged inside the casing and can rotate about a rotation center axis along the axial direction of the casing.
  • the blades are arranged between the casing and the rotating body, and rotate together with the rotating body.
  • the blade has a first end on the inlet side and a second end on the outlet side.
  • the casing has a space on the discharge port side of the second end of the blade in the axial direction.
  • the separation system includes the separation device and a drive device.
  • the driving device rotationally drives the rotating body.
  • FIG. 1 is a perspective view of the separation device according to the embodiment.
  • FIG. 2 is a cross-sectional view of the separation device of the same.
  • FIG. 3 is a vertical cross-sectional view of the separation device of the same.
  • FIG. 4 is a schematic configuration diagram of a separation system including the above-mentioned separation device.
  • FIG. 5 is a perspective view of the separation device according to the first modification of the embodiment.
  • FIG. 6 is a perspective view of the separation device according to the comparative example.
  • FIG. 7 is a graph showing the separation characteristics of the separation device according to the embodiment, the separation device according to the modified example 1 of the embodiment, and the separation device according to the comparative example.
  • FIG. 1 is a perspective view of the separation device according to the embodiment.
  • FIG. 2 is a cross-sectional view of the separation device of the same.
  • FIG. 3 is a vertical cross-sectional view of the separation device of the same.
  • FIG. 4 is a schematic configuration diagram of a separation
  • FIG. 8A is a diagram showing a simulation result of a trajectory of particles having a particle size of 2 ⁇ m in the separation device according to the embodiment.
  • FIG. 8B is a diagram showing a simulation result of a trajectory of particles having a particle size of 5.48 ⁇ m in the same separation device.
  • FIG. 8C is a diagram showing a simulation result of the trajectory of particles having a particle size of 8.94 ⁇ m in the same separation device.
  • FIG. 9A is a diagram showing a simulation result of the locus of particles having a particle size of 2 ⁇ m in the separation device according to the modified example of the embodiment.
  • FIG. 9B is a diagram showing a simulation result of the trajectory of particles having a particle size of 5.48 ⁇ m in the same separation device.
  • FIG. 9C is a diagram showing a simulation result of the trajectory of particles having a particle size of 8.94 ⁇ m in the same separation device.
  • FIG. 10A is a diagram showing a simulation result of a trajectory of particles having a particle size of 2 ⁇ m in the separation device according to the comparative example.
  • FIG. 10B is a diagram showing a simulation result of a trajectory of a particle having a particle size of 5.48 ⁇ m in the same separation device.
  • FIG. 10C is a diagram showing a simulation result of a trajectory of a particle having a particle size of 8.94 ⁇ m in the same separation device.
  • FIG. 11 is a configuration diagram of a main part of the separation device according to the second modification of the embodiment.
  • FIG. 12 is a configuration diagram of a main part of the separation device according to the third modification of the embodiment.
  • FIG. 13 is a configuration diagram of a main part of the separation device according to the modified example 4 of the embodiment.
  • FIGS. 1 to 3, 5, 6, and 8A to 13 described in the following embodiments and the like are schematic views, and the ratio of the size and the thickness of each component in the drawing is not necessarily the actual dimensional ratio. Does not always reflect.
  • the separation device 1 is provided on the upstream side of an air conditioner having a ventilation function, for example, and separates solids in air (gas).
  • the separation device 1 is installed, for example, on the roof of a facility (house or the like) having a flat roof, or on the ground.
  • the air conditioning equipment is, for example, a blower that blows air from the upstream side to the downstream side.
  • the blower is, for example, an electric fan.
  • the air conditioning equipment is not limited to the blower, and may be, for example, an air conditioning system including a ventilation device, an air conditioner, an air supply cabinet fan, a blower and a heat exchanger.
  • the flow rate of the air flowing through the separation device 1 by the air conditioning equipment is, for example, 50 m 3 / h to 500 m 3 / h.
  • the amount of air flowing out from the separating device 1 to the air conditioning equipment side is substantially the same as the flow rate of air flowing through the air conditioning equipment.
  • the separating device 1 includes a casing 2, a rotating body 3, and blades 4. Further, as shown in FIG. 4, the separation system 10 includes a separation device 1 and a drive device 6.
  • the casing 2 has a gas inlet 21, a gas outlet 22, and a solid outlet 23.
  • the rotating body 3 is arranged inside the casing 2.
  • the rotating body 3 can rotate about a rotation center axis 30 (see FIGS. 2 and 3) along the axial direction of the casing 2.
  • the blade 4 is arranged between the casing 2 and the rotating body 3.
  • the blade 4 rotates together with the rotating body 3.
  • the blade 4 has a first end 41 on the inflow port 21 side and a second end 42 on the outflow port 22 side.
  • the casing 2 has a space 25 on the discharge port 23 side of the second end 42 of the blade 4 in the axial direction of the casing 2.
  • the discharge port 23 is a hole for discharging a solid contained in air to the outside of the casing 2, for example.
  • the discharge port 23 connects the inner space of the casing 2 and the outer space of the casing 2. In other words, the discharge port 23 communicates the inside and outside of the casing 2.
  • the separating device 1 When the rotating body 3 rotates, the separating device 1 generates an air flow that swirls in the casing 2 in the casing 2.
  • a part of the flow path from the inflow port 21 to the outflow port 22 is formed between the casing 2 and the rotating body 3.
  • the separation device 1 can flow the air that has flowed into the casing 2 from the upstream side to the downstream side while spirally rotating around the rotating body 3.
  • the "upstream side” here means the upstream side (primary side) when viewed in the direction of air flow.
  • the “downstream side” means the downstream side (secondary side) when viewed in the direction of air flow.
  • the separation device 1 is used, for example, in a state where the outflow port 22 is located above the inflow port 21. In this case, in the separation device 1, the air flowing into the flow path from the inflow port 21 of the casing 2 can be raised while spirally rotating around the rotating body 3 and flowed to the outflow port 22.
  • the casing 2 of the separation device 1 has the above-mentioned discharge port 23 in order to discharge the solid contained in the air to the outside of the casing 2.
  • the discharge port 23 in order to discharge the solid contained in the air to the outside of the casing 2.
  • the separation system 10 includes a drive device 6 in addition to the separation device 1.
  • the drive device 6 rotationally drives the rotating body 3. That is, the drive device 6 rotates the rotating body 3 around the rotation center axis 30.
  • the drive device 6 includes, for example, a motor.
  • Examples of the solid in the air include fine particles, dust and the like.
  • Examples of the fine particles include particulate matter and the like.
  • Particulate matter includes primary particles that are directly released into the air as fine particles, secondary particles that are released into the air as gas and are produced as fine particles in the air, and the like.
  • Examples of the primary particles include soil particles (yellow sand and the like), dust, plant particles (pollen and the like), animal particles (mold spores and the like), soot and the like.
  • examples of the size classification include PM1.0, PM2.5 (microparticulate matter), PM10, SPM (suspended particulate matter) and the like.
  • PM1.0 is fine particles that pass through a sizing device having a particle size of 1.0 ⁇ m and a collection efficiency of 50%.
  • PM2.5 is a fine particle that permeates a sizing device having a particle size of 2.5 ⁇ m and a collection efficiency of 50%.
  • PM10 is a fine particle that permeates a sizing device having a particle size of 10 ⁇ m and a collection efficiency of 50%.
  • SPM is a fine particle that permeates a sizing device having a particle diameter of 10 ⁇ m and a collection efficiency of 100%, corresponds to PM6.5-7.0, and is a little smaller than PM10.
  • the separating device 1 includes a casing 2, a rotating body 3, and blades 4. Further, the separation system 10 includes a separation device 1 and a drive device 6.
  • the material of the casing 2 is, for example, metal, but the material is not limited to this, and may be a resin (for example, ABS resin). Further, the casing 2 may include a metal portion formed of metal and a resin portion formed of resin.
  • the casing 2 has a casing main body 200, a first end portion 201, a second end portion 202, and an outlet duct portion 203.
  • the first end portion 201, the casing main body 200, and the second end portion 202 are arranged in this order in the axial direction of the casing 2.
  • the first end portion 201 has an inflow port 21, the outlet duct portion 203 has an outflow port 22, and the casing main body 200 has an outlet 23.
  • the inflow port 21, the outflow port 22, and the discharge port 23 are open to the side of the casing 2.
  • the discharge port 23 is located between the inflow port 21 and the outflow port 22.
  • the distance between the discharge port 23 and the outflow port 22 is shorter than the distance between the discharge port 23 and the inflow port 21.
  • the casing main body 200 has a bottomed cylindrical shape having a bottom portion 2001 and a cylindrical portion 2002, and surrounds the rotating body 3.
  • the bottom 2001 has a circular opening 2003 that penetrates the casing 2 in the axial direction.
  • the axial direction of the casing 2 is a direction along the central axis of the casing main body 200 (axial direction of the casing main body 200).
  • the central axis of the casing main body 200 is the central axis 20 of the casing 2 (see FIG. 3).
  • the length of the casing body 200 is longer than the length of the rotating body 3.
  • the inner and outer diameters of the casing main body 200 are constant over the entire length of the casing main body 200 in the axial direction.
  • the discharge port 23 is formed along the outer peripheral edge of the casing 2.
  • the discharge port 23 is formed on the outer peripheral surface 28 of the casing 2 (here, the outer peripheral surface of the casing main body 200).
  • the discharge port 23 is formed in the cylindrical portion 2002 of the casing main body 200 near the bottom portion 2001.
  • the casing body 200 has a plurality of (four in the illustrated example) outlets 23.
  • each of the plurality of discharge ports 23 has, for example, a substantially quarter arc shape, and is arranged in the circumferential direction along the outer peripheral edge of the casing main body 200.
  • the opening range of each of the four discharge ports 23 is slightly smaller than 90 degrees with the central axis of the casing body 200 as the center.
  • the solid passing near the inner peripheral surface 27 of the casing 2 here, the inner peripheral surface of the casing main body 200
  • one discharge port 23 may be used, and this one discharge port 23 may be an annular shape formed over the entire circumference of the casing main body 200 in the circumferential direction.
  • the casing body 200 is divided into two members facing each other via the discharge port 23 in the axial direction of the casing 2, for example.
  • the first end portion 201 is provided on the upstream side of the casing main body 200 in the axial direction of the casing 2.
  • the first end portion 201 is connected to the casing main body 200.
  • the inner space of the first end portion 201 is connected to the inner space of the casing main body 200.
  • the first end portion 201 has a bottomed cylindrical small diameter portion 211 having an inflow port 21 and an enlarged diameter portion 212.
  • the outer diameter and inner diameter of the small diameter portion 211 are smaller than the outer diameter and inner diameter of the casing main body 200, respectively.
  • the inflow port 21 is formed in the small diameter portion 211 near the bottom portion 2111 of the small diameter portion 211.
  • the enlarged diameter portion 212 has a tapered cylindrical shape in which the outer diameter and the inner diameter gradually increase as the casing 2 moves away from the small diameter portion 211 and approaches the casing main body 200 in the axial direction of the casing 2.
  • the enlarged diameter portion 212 has a first end on the small diameter portion 211 side and a second end on the casing main body 200 side. The first end of the enlarged diameter portion 212 is connected to the small diameter portion 211.
  • the second end of the enlarged diameter portion 212 is connected to the casing main body 200.
  • the outer diameter and inner diameter of the enlarged diameter portion 212 are the same as the outer diameter and inner diameter of the small diameter portion 211 at the ends of the casing 2 on the small diameter portion 211 side in the axial direction, respectively.
  • the outer diameter and inner diameter of the enlarged diameter portion 212 are the same as the outer diameter and inner diameter of the casing main body 200 at the ends of the casing 2 on the casing main body 200 side in the axial direction, respectively. That is, in the diameter-expanded portion 212, the opening area gradually increases as the distance from the inflow port 21 increases in the axial direction of the casing 2.
  • the second end portion 202 is provided on the downstream side of the casing main body 200 in the axial direction of the casing 2, and covers the opening 2003 of the bottom portion 2001 of the casing main body 200.
  • the second end portion 202 is connected to the casing main body 200.
  • the inner space of the second end portion 202 is connected to the inner space of the casing main body 200.
  • the second end portion 202 has a bottomed cylindrical shape having a disc-shaped bottom portion 221 and a cylindrical peripheral wall 222.
  • An opening 223 through which gas flows out is formed in the peripheral wall 222 of the second end portion 202.
  • the opening 223 penetrates in a direction orthogonal to the axial direction of the casing 2.
  • the inner diameter ⁇ 2 see FIG.
  • the inner diameter ⁇ 2 of the peripheral wall 222 is, for example, the same as the diameter of the opening 2003 of the bottom 2001 of the casing main body 200.
  • the outlet duct portion 203 is connected to the second end portion 202.
  • the inner space of the outlet duct portion 203 is connected to the inner space of the second end portion 202.
  • the outlet duct portion 203 is connected to the peripheral edge of the opening 223, for example, on the outer peripheral surface 227 of the second end portion 202.
  • the outlet duct portion 203 is a duct for supplying the gas from which the solid is separated to the outside of the casing 2.
  • the outlet duct portion 203 extends from the outer peripheral surface 227 of the second end portion 202 in the direction along the tangential direction of the outer peripheral surface 227 when viewed from the axial direction of the casing 2.
  • the tangential direction is a direction along the rotation direction R1 (see FIG. 2) of the rotating body 3.
  • the outflow port 22 is formed in the outlet duct portion 203 on the side opposite to the opening 223 side of the second end portion 202.
  • the outlet duct portion 203 has a square tubular shape.
  • the opening shape of the outlet 22 is, for example, a square shape.
  • the rotating body 3 is arranged coaxially with the casing 2 inside the casing 2. “Arranged coaxially with the casing 2” means that the rotating body 3 is arranged so that the rotation central axis 30 (see FIG. 3) of the rotating body 3 is aligned with the central axis 20 (see FIG. 3) of the casing 2. It means that it has been done.
  • the rotating body 3 is, for example, cylindrical.
  • the material of the rotating body 3 is, for example, a polycarbonate resin.
  • the length of the rotating body 3 is shorter than the length of the casing main body 200 in the axial direction of the casing 2.
  • the rotating body 3 has a first end 31 on the inflow port 21 side and a second end 32 on the outflow port 22 side.
  • the rotating body 3 is arranged near the first end portion 201 in the axial direction of the casing 2. More specifically, in the axial direction of the casing 2, the distance between the rotating body 3 and the first end portion 201 is shorter than the distance between the rotating body 3 and the second end portion 202.
  • a plurality of (here, 24 blades) blades 4 are arranged between the casing 2 and the rotating body 3. That is, the separation device 1 includes a plurality of blades 4. The plurality of blades 4 are connected to the rotating body 3 and separated from the casing 2. The plurality of blades 4 rotate together with the rotating body 3.
  • the plurality of blades 4 are provided on the rotating body 3 over the entire length of the rotating body 3 in the direction along the axial direction of the casing 2. That is, the plurality of blades 4 are provided from the first end 31 to the second end 32 of the rotating body 3.
  • the material of the plurality of blades 4 is, for example, a polycarbonate resin.
  • the material of the rotating body 3 and the material of the plurality of blades 4 are the same, but the material is not limited to this and may be different.
  • the plurality of blades 4 may be formed integrally with the rotating body 3, or may be formed as a separate member from the rotating body 3 and fixed to the rotating body 3 to be connected to the rotating body 3.
  • Each of the plurality of blades 4 is arranged so that a gap is formed between each blade 4 and the casing 2 when viewed from the axial direction of the casing 2.
  • the distance between the protruding tip of each of the plurality of blades 4 and the outer peripheral surface 37 of the rotating body 3 is the distance between the outer peripheral surface 37 of the rotating body 3 and the inner peripheral surface 27 of the casing 2. Shorter than.
  • Each of the plurality of blades 4 is arranged parallel to the rotation center axis 30 of the rotating body 3 in the space (flow path) between the outer peripheral surface 37 of the rotating body 3 and the inner peripheral surface 27 of the casing 2.
  • Each of the plurality of blades 4 has a flat plate shape.
  • Each of the plurality of blades 4 has a rectangular shape that is long in the direction along the rotation center axis 30 of the rotating body 3 when viewed from the thickness direction thereof.
  • Each of the plurality of blades 4 is tilted by a predetermined angle (for example, 45 degrees) with respect to one radial direction of the rotating body 3 when viewed from the second end portion 202 side in the direction along the axial direction of the casing 2. ..
  • each of the plurality of blades 4 is tilted by a predetermined angle (for example, 45 degrees) with respect to the one-diameter direction of the rotating body 3 in the rotating direction R1 of the rotating body 3.
  • the predetermined angle is not limited to 45 degrees, and may be an angle larger than 0 degrees and 90 degrees or less.
  • the predetermined angle may be an angle within the range of 10 degrees or more and 80 degrees or less.
  • Each of the plurality of blades 4 is not limited to the case where each of the plurality of blades 4 is tilted by a predetermined angle in the rotation direction R1 of the rotating body 3 with respect to the one radial direction of the rotating body 3, for example, the angle formed by the one radial direction of the rotating body 3. May be 0 degrees. That is, a plurality of blades 4 may extend radially from the rotating body 3. As shown in FIG. 2, the plurality of blades 4 are arranged at equal angular intervals in the circumferential direction of the rotating body 3.
  • the "equal angle interval” here is not limited to the case where the angle intervals are exactly the same, for example, within a predetermined error range (for example, ⁇ 10% of the specified angle interval) with respect to the specified angle interval. It may be an angular interval of.
  • the length of each of the plurality of blades 4 is the same as the length of the rotating body 3.
  • the length of each of the plurality of blades 4 is not limited to the same as the length of the rotating body 3, and may be longer or shorter than that of the rotating body 3.
  • the length of each of the plurality of blades 4 is shorter than the length of the casing main body 200. In the direction along the rotation center axis 30 of the rotating body 3, the length of each of the plurality of blades 4 is shorter than the distance between the first end portion 201 of the casing 2 and the discharge port 23.
  • Each of the plurality of blades 4 has a first end 41 which is an end on the inflow port 21 side (here, the first end portion 201 side) and an outflow port 22 side (here, the second end portion 201 side) in the axial direction of the casing 2. It has a second end 42, which is an end of the end portion 202 side).
  • the first end 41 of each of the plurality of blades 4 is an end (upstream end) on the side of the first end portion 201 in the axial direction of the casing 2.
  • the second end 42 of each of the plurality of blades 4 is an end (downstream end) on the side of the second end portion 202 in the axial direction of the casing 2.
  • the casing 2 has a space 25 on the discharge port 23 side of the second end 42 of each blade 4 in the axial direction thereof.
  • the discharge port 23 is located at a position overlapping the space 25 in a direction orthogonal to the rotation center axis 30 of the rotating body 3. That is, the discharge port 23 is located at a position overlapping the space 25 in a direction orthogonal to the axial direction of the casing 2. Further, in the separating device 1, the discharge port 23 is located at a position that does not overlap with each of the blades 4 in a direction orthogonal to the rotation center axis 30 of the rotating body 3.
  • the discharge port 23 is located at a position that does not overlap with each of the blades 4 in a direction orthogonal to the axial direction of the casing 2. In other words, there are no blades 4 in the projected area of the discharge port 23 when the casing 2 is viewed from the side.
  • the length L25 of the space 25 (see FIG. 3) with respect to the total (L4 + L25) of the length L4 of the blade 4 (see FIG. 3) and the length L25 of the space 25 (see FIG. 3) in the axial direction of the casing 2.
  • the ratio (see) (L25 / (L4 + L25)) is, for example, 0.4.
  • the casing 2 further has a partition wall 26 (see FIG. 3) that separates the discharge port 23 and the outflow port 22 in the space 25.
  • the length L26 of the partition wall 26 is the same as the length L23 of the discharge port 23, but is not limited to this, and may be different from the length L23 of the discharge port 23.
  • the partition wall 26 is, for example, an annular shape.
  • the inner diameter ⁇ 3 of the partition wall 26 is the same as the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202, but is not limited to this, and may be different from the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202.
  • the separation system 10 includes a separation device 1 and a drive device 6 that rotationally drives the rotating body 3 of the separation device 1.
  • the drive device 6 includes, for example, a motor that rotationally drives the rotating body 3.
  • the drive device 6 may directly or indirectly connect the rotating shaft of the motor to the rotating body 3, or transmit the rotation of the rotating shaft of the motor to the rotating body 3 via the pulley and the rotating belt. You may have it.
  • the motor may be arranged inside the casing 2 or may be arranged outside the casing 2.
  • the rotation speed of the rotating body 3 rotationally driven by the driving device 6 is, for example, 1500 rpm to 3000 rpm.
  • the separation system 10 further includes a control device 7 that controls the drive device 6.
  • the control device 7 includes a computer system.
  • a computer system mainly consists of a processor and a memory as hardware.
  • the function as the control device 7 is realized by the processor executing the program recorded in the memory of the computer system.
  • the program may be pre-recorded in the memory of the computer system, may be provided through a telecommunications line, and may be recorded on a non-temporary recording medium such as a memory card, optical disk, hard disk drive, etc. readable by the computer system. May be provided.
  • a processor in a computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI).
  • IC semiconductor integrated circuit
  • LSI large scale integrated circuit
  • the integrated circuit such as IC or LSI referred to here has a different name depending on the degree of integration, and includes an integrated circuit called a system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration).
  • an FPGA Field-Programmable Gate Array
  • a plurality of electronic circuits may be integrated on one chip, or may be distributed on a plurality of chips.
  • the plurality of chips may be integrated in one device, or may be distributed in a plurality of devices.
  • the computer system referred to here includes a microprocessor having one or more processors and one or more memories. Therefore, the microprocessor is also composed of one or a plurality of electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.
  • the rotation direction R1 (see FIG. 2) of the rotating body 3 is, for example, the rotating body from the second end portion 202 side in the axial direction of the casing 2. When 3 is seen, it is in the clockwise direction.
  • the separation system 10 rotationally drives the rotating body 3 by the driving device 6.
  • the rotating body 3 having the blades 4 can rotate to apply a force in the rotation direction around the rotation center axis 30 to the air flowing into the inner space (flow path) of the casing 2. It becomes.
  • the rotation of the rotating body 3 causes the plurality of blades 4 to rotate together with the rotating body 3, and the velocity vector of the air flowing in the inner space of the casing 2 is in the direction parallel to the rotation center axis 30. It will have a velocity component and a velocity component in the direction of rotation around the central axis of rotation 30.
  • the rotating body 3 and each of the blades 4 rotate to generate a swirling air flow in the casing 2.
  • the swirling airflow is a three-dimensional spirally rotating airflow.
  • the solid contained in the air flowing into the casing 2 goes from the rotation center axis 30 of the rotating body 3 toward the inner peripheral surface 27 of the casing 2 when spirally rotating in the inner space of the casing 2. Receives centrifugal force in the direction.
  • the solid subjected to the centrifugal force moves toward the inner peripheral surface 27 of the casing 2 and spirally rotates around the inner peripheral surface 27 of the casing 2 along the inner peripheral surface 27.
  • a part of the solid in the air is discharged from the discharge port 23 while passing through the inner space of the casing 2.
  • the centrifugal force acting on a solid is proportional to the mass of the solid. Therefore, a solid having a relatively large mass tends to reach the vicinity of the inner peripheral surface 27 of the casing 2 before a solid having a relatively small mass.
  • the separating device 1 Since the separating device 1 has a space 25 in the casing 2, for example, two adjacent rotating bodies 3 are adjacent to each other in the rotation direction R1 between the outer peripheral surface 37 of the rotating body 3 and the inner peripheral surface 27 of the casing 2. Even if a vortex is generated in the space between the blades 4, it is likely to be rectified into a spiral airflow in the space 25 downstream of each blade 4. When a particle having a large particle size is subjected to centrifugal force, it easily deviates from the air flow, approaches the inner peripheral surface 27 of the casing 2, and is easily discharged from the discharge port 23.
  • the separation efficiency tends to increase as the rotation speed of the rotating body 3 increases. Further, regarding the separation characteristics of the separation device 1, the separation efficiency tends to increase as the particle size increases.
  • the rotation speed of the rotating body 3 is set so as to separate fine particles having a specified particle size or larger.
  • the fine particles having a specified particle size for example, particles having an aerodynamic particle diameter of 2 ⁇ m are assumed.
  • the "aerodynamic particle size” means the diameter of a particle whose aerodynamic behavior is equivalent to a spherical particle having a specific gravity of 1.0.
  • the aerodynamic particle size is the particle size obtained from the sedimentation rate of the particles.
  • Solids that remain in the air without being separated by the separation device 1 are, for example, fine particles having a smaller particle size than the fine particles that are supposed to be separated by the separation device 1 (in other words, it is assumed that they are separated by the separation device 1). Contains fine particles with a mass smaller than the mass of the fine particles.
  • the ratio of the length L25 of the space 25 to the total (L4 + L25) of the length L4 of the blade 4 and the length L25 of the space 25 in the axial direction of the casing 2 (L25 / (L4 + L25)). ) Is 0.7.
  • the inner diameter of the peripheral wall 222 of the second end portion 202 in the casing 2 is larger than the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202 in the casing 2 of the separating device 1 according to the embodiment. Is also small.
  • the separation device 1R according to the comparative example is different from the separation device 1 according to the embodiment in that it does not have a space 25.
  • the length of the blade 4 in the axial direction of the casing 2 is longer than the length L4 of the blade 4 of the separating device 1 according to the embodiment.
  • a plurality of discharge ports 23 are arranged in the axial direction of the casing 2.
  • FIG. 7 is a graph showing the simulation results of the separation characteristics of the separation device 1 according to the embodiment, the separation device 1A according to the modified example 1, and the separation device 1R according to the comparative example.
  • the horizontal axis in FIG. 7 is the particle size.
  • the vertical axis of FIG. 7 is the separation efficiency.
  • the data plotted in a diamond shape is the separation characteristic of the separation device 1 according to the embodiment.
  • the data plotted in circles is the separation characteristic of the separation device 1A according to the first modification.
  • the data plotted in the square is the separation characteristic of the separation device 1R according to the comparative example.
  • the separation device 1 according to the embodiment can improve the separation efficiency with respect to the fine particles having a particle size of 1 ⁇ m to 7 ⁇ m as compared with the separation device 1R according to the comparative example. Further, it can be seen that the separation device 1A according to the modified example 1 can improve the separation efficiency with respect to the fine particles having a particle size of 2.6 ⁇ m to 5 ⁇ m as compared with the separation device 1R according to the comparative example.
  • the separation device 1 according to the embodiment can improve the separation efficiency with respect to the fine particles having a particle size of 1 ⁇ m to 5 ⁇ m as compared with the separation device 1A according to the modified example 1.
  • the airflow in the casing 2 in each of the separation devices 1, 1A and 1R can be estimated from the result of a simulation using, for example, fluid analysis software.
  • fluid analysis software for example, ANSYS (R) Fluent (R) can be adopted.
  • ANSYS (R) Fluent (R) can be adopted.
  • the inventors of the present application turbulently turbulently flow in the space surrounded by the rotating body 3 and the two blades 4 adjacent to each other in the circumferential direction of the rotating body 3 and the casing 2. We obtained the finding that flow is likely to occur.
  • the inventors of the present application performed a simulation using the particle trajectory analysis software on the simulation results using the above-mentioned fluid analysis software for each of the separation devices 1, 1A and 1R.
  • the particle trajectory analysis method for example, DPM (Discrete Phase Model) can be adopted.
  • 8A to 8C show examples of particle trajectories in the casing 2 of the separation device 1 according to the embodiment with thick lines.
  • 9A to 9C show examples of particle trajectories in the casing 2 of the separation device 1A according to the first modification with thick lines.
  • 10A to 10C show examples of particle trajectories in the casing 2 of the separation device 1R according to the comparative example with thick lines.
  • 8A, 9A and 10A are loci of particles having a particle size of 2 ⁇ m.
  • 8B, 9B and 10B are loci of particles having a particle size of 5.48 ⁇ m.
  • 8C, 9C and 10C are loci of particles having a particle size of 8.94 ⁇ m.
  • the separation device 1 according to the embodiment and the separation device 1A according to the modified example 1 are the separation device 1R according to the comparative example.
  • the casing 2 is easily swiveled along the inner peripheral surface 27 and is easily discharged from the discharge port 23.
  • the separation device 1 according to the embodiment and the separation device 1A according to the modified example 1 are the separation devices according to the comparative example. It can be seen that, as compared with 1R, it is easier to turn along the inner peripheral surface 27 of the casing 2, and it is easier to discharge from the discharge port 23. From the comparison between FIGS. 8C and 9C and FIG. 10C, when looking at the particles having a particle size of 8.94 ⁇ m, any of the separation device 1 according to the embodiment, the separation device 1A according to the modified example 1, and the separation device 1R according to the comparative example. However, it can be seen that it is easy to turn along the inner peripheral surface 27 of the casing 2 and is easily discharged from the discharge port 23.
  • the ratio of the length L25 of the space 25 (L25 / (L4 + L25)) to the total of the length L4 of the blade 4 and the length L25 of the space 25 in the axial direction of the casing 2 is, for example, from the viewpoint of increasing the separation efficiency and the pressure loss. It is preferably 0.2 or more from the viewpoint of suppressing the above.
  • the above ratio (L25 / (L4 + L25)) is preferably 0.8 or less from the viewpoint of separating fine particles having a smaller particle size, for example.
  • the distance B0 between the inner peripheral surface of the casing main body 200 and the opening 2003 is a half of the difference between the inner diameter of the casing main body 200 and the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202.
  • the separation efficiency is higher when the distance B0 between the inner peripheral surface of the casing main body 200 and the opening 2003 is increased from 50 mm to 80 mm. Therefore, from the viewpoint of increasing the separation efficiency of the separation device 1, it is presumed that it is preferable to increase the distance B0. However, the distance B0 becomes smaller as the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202 becomes larger.
  • the structural parameters are not optimized individually, but are optimized in consideration of the correlation of the plurality of parameters.
  • the separation efficiency changes, but the pressure loss also changes.
  • the length L4 of the blade 4 is adjusted so as to increase the separation efficiency in optimizing the structural parameters, the length of the blade 4 and the length of the blade 4 are adjusted so that the pressure loss is within the desired pressure loss.
  • the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202 is adjusted.
  • the length L4 of the blade 4, the inner diameter ⁇ 2 of the peripheral wall 222 of the second end portion 202, and the area of the opening area of the small diameter portion 211 are appropriately adjusted to reduce the pressure loss and improve the separation efficiency. We are trying to improve.
  • the separation device 1 includes a casing 2, a rotating body 3, and blades 4.
  • the casing 2 has a gas inlet 21, a gas outlet 22, and a solid outlet 23.
  • the rotating body 3 is arranged inside the casing 2 and can rotate about the rotation center axis 30 along the axial direction of the casing 2.
  • the blade 4 is arranged between the casing 2 and the rotating body 3, and rotates together with the rotating body 3.
  • the blade 4 has a first end 41 on the inflow port 21 side and a second end 42 on the outflow port 22 side.
  • the casing 2 has a space 25 on the discharge port 23 side of the second end 42 of the blade 4 in the axial direction.
  • the separation device 1 according to the embodiment can improve the separation performance.
  • the separator 1 is, for example, upstream of an air filter such as a HEPA filter (high efficiency particulate air filter) arranged on the upstream side of an air conditioner in an air purification system installed in a house or the like. Place it on the side and use it.
  • the "HEPA filter” is an air filter having a particle collection rate of 99.97% or more and an initial pressure loss of 245 Pa or less with respect to particles having a particle size of 0.3 ⁇ m at a rated flow rate. Air filters do not require 100% particle collection efficiency.
  • the air purification system it is possible to extend the life of the air filter or the like located on the downstream side of the separation device 1. For example, in an air purification system, it is possible to suppress an increase in pressure loss due to an increase in the total mass of fine particles and the like collected by an air filter. This makes it possible to reduce the frequency of replacement of the air filter in the air purification system.
  • the air purification system is not limited to a configuration in which the air filter and the air conditioning equipment are housed in different housings, and the air filter may be provided in the housing of the air conditioning equipment. In other words, the air conditioner may be equipped with an air filter in addition to the blower.
  • Embodiment is only one of the various embodiments of the present disclosure.
  • the embodiment can be changed in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.
  • the rectifying structure 8 may be further provided.
  • the rectifying structure 8 is located inside the casing 2 between the inflow port 21 and the rotating body 3, and rectifies the flow of gas flowing into the casing 2.
  • the rectifying structure 8 has, for example, a truncated cone shape, and is arranged inside the enlarged diameter portion 212 between the small diameter portion 211 and the casing main body 200.
  • the rectifying structure 8 is arranged so that its central axis is aligned with the central axis 20 (see FIG. 3) of the casing 2.
  • the gas that has flowed into the casing 2 from the inflow port 21 can be easily introduced into a place far from the outer peripheral surface 37 of the rotating body 3 and closer to the inner peripheral surface 27 of the casing 2 in the radial direction of the rotating body 3.
  • the flow of gas in the enlarged diameter portion 212 is schematically shown by an arrow F1.
  • the rectifying structure 8 may be supported by, for example, the casing 2 via one or a plurality of beams, or may be connected to the rotating body 3.
  • a rotating shaft 9 arranged along the rotating central axis 30 of the rotating body 3 may be further provided.
  • at least a part of the rotation shaft 9 is arranged in the space 25.
  • the rotating shaft 9 may or may not be connected to the rotating body 3. Further, the rotating shaft 9 may rotate together with the rotating body 3 or may rotate separately from the rotating body 3.
  • the separation device 1 is a modification 3 apart from the plurality of first blades each of the plurality of blades 4 connected to the rotating body 3.
  • a plurality of second blades 11 connected to the rotating shaft 9 described in the above may be provided.
  • the protrusion of the plurality of second blades 11 from the rotating shaft 9 becomes smaller as the distance from the rotating body 3 increases in the axial direction of the casing 2.
  • Each of the plurality of second blades 11 may or may not be tilted with respect to one radial direction of the rotating body 3 when viewed from the second end portion 202 side in the direction along the axial direction of the casing 2. You may.
  • each of the plurality of second blades 11 has a protrusion dimension from the rotating shaft 9 smaller than that of the first blade protruding from the rotating body 3, and is longer in the axial direction of the rotating shaft 9 when viewed from the thickness direction thereof. It may be rectangular.
  • the discharge port 23 is not limited to the case where it is formed on the outer peripheral surface 28 of the casing 2, and may be formed on the bottom portion 2001 of the casing main body 200. ..
  • the discharge port 23 is not limited to a position that does not overlap with the blade 4 in the direction orthogonal to the rotation center axis 30 of the rotating body 3, but is a position where at least a part overlaps with the blade 4 in the direction orthogonal to the rotation center axis 30. May be.
  • the casing 2 of the separation device 1 has a discharge port 23 at a position that does not overlap with the blade 4 in a direction orthogonal to the rotation center axis 30, and a discharge port 23 at a position that overlaps with the blade 4 in a direction orthogonal to the rotation center axis 30. It may have an exit and.
  • the number of the discharge ports 23 included in the casing 2 is not limited to a plurality, and may be one.
  • the discharge ports 23 may have an arc shape when viewed from the axial direction of the casing 2, or may be, for example, in the circumferential direction of the casing 2 (direction along the outer periphery of the casing 2). It may be an annular shape formed over the entire circumference.
  • shapes of the plurality of outlets 23 are not limited to the case where they are the same as each other, but may be different.
  • each of the plurality of blades 4 even if the tip on the casing 2 side in the protruding direction from the rotating body 3 is located forward of the base end on the rotating body 3 side in the rotating direction R1 of the rotating body 3. Good.
  • each of the plurality of blades 4 may have a shape including one or more curved portions such as an arc shape.
  • each of the plurality of blades 4 may be spirally formed around the rotation center axis 30 of the rotating body 3.
  • the "spiral shape” is not limited to a spiral shape having a rotation speed of 1 or more, but also includes a part of a spiral shape having a rotation speed of 1.
  • the rotating body 3 may include a plurality of rotating members.
  • the rotating members arranged in the direction along the central axis 20 of the casing 2 are connected to each other.
  • the casing 2 in the separation device 1 may have a plurality of outlets 22.
  • the casing 2 may have a plurality of outlet duct portions 203.
  • the plurality of outlet duct portions 203 may be arranged in the circumferential direction of the casing 2, or may be located at different positions in the axial direction of the casing 2.
  • the separation device 1 may be configured not to include the outlet duct portion 203.
  • gas flowing into the casing 2 from the inflow port 21 of the casing 2 is not limited to air, and may be, for example, exhaust gas or the like.
  • partition wall 26 is not limited to an annular shape, and may be arcuate when viewed from the axial direction of the casing 2. In this case, the number of partition walls 26 may be one or a plurality.
  • the separation system (1; 1A) includes a casing (2), a rotating body (3), and blades (4).
  • the casing (2) has a gas inlet (21), a gas outlet (22), and a solid outlet (23).
  • the rotating body (3) is arranged inside the casing (2), and can rotate about the rotation center axis (30) along the axial direction of the casing (2).
  • the blade (4) is arranged between the casing (2) and the rotating body (3), and rotates together with the rotating body (3).
  • the blade (4) has a first end (41) on the inflow port (21) side and a second end (42) on the outflow port (22) side.
  • the casing (2) has a space (25) on the discharge port (23) side of the second end (42) of the blade (4) in the axial direction.
  • the separation system (1; 1A) according to the first aspect can improve the separation performance for separating a solid contained in a gas from the gas.
  • the discharge port (23) is formed along the outer peripheral edge of the casing (2).
  • the separation device (1; 1A) according to the second aspect can improve the separation efficiency as compared with the case where the discharge port (23) is not formed along the outer peripheral edge of the casing (2). Become.
  • the discharge port (23) is formed on the outer peripheral surface (28) of the casing (2).
  • the solid on which the centrifugal force acts is easily discharged from the discharge port (23).
  • the casing (2) has an outlet (23) and an outlet (22) in the space (25). ) Is further provided with a partition wall (26).
  • the solid on which the centrifugal force acts is easily discharged from the discharge port (23) and is less likely to be discharged from the outlet (22).
  • the discharge port (23) is a blade (4) in a direction orthogonal to the rotation center axis (30). It is in a position that does not overlap with.
  • the separation device (1; 1A) according to the fifth aspect is in a position where the discharge port (23) is at least partially overlapped with the blade (4) in the direction orthogonal to the rotation center axis (30). It is possible to improve the separation efficiency.
  • the separation device (1; 1A) according to the sixth aspect further includes a rectifying structure (8) in any one of the first to fifth aspects.
  • the rectifying structure (8) is located inside the casing (2) between the inflow port (21) and the rotating body (3), and rectifies the flow of gas flowing into the inflow port (21).
  • the separation device (1; 1A) according to the sixth aspect can rectify the flow of gas flowing into the casing (2).
  • the inflow port (21) penetrates in a direction intersecting the axial direction of the casing (2). There is.
  • the separation device (1; 1A) according to the seventh aspect it is possible to prevent the flow rate of the gas flowing in from the inflow port (21) from becoming too large.
  • the separation device (1; 1A) according to the eighth aspect further includes a rotation shaft (9) in any one of the first to seventh aspects.
  • the rotation axis (9) is arranged along the rotation center axis (30) of the rotating body (3). At least a part of the rotation axis (9) is arranged in the space (25).
  • the configurations according to the second to eighth aspects are not essential configurations for the separation device (1; 1A) and can be omitted as appropriate.
  • the separation system (10) includes a separation device (1; 1A) according to any one of the first to eighth aspects and a drive device (6).
  • the drive device (6) rotationally drives the rotating body (3).
  • the separation system (10) according to the ninth aspect can improve the separation performance for separating the solid contained in the gas from the gas.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Centrifugal Separators (AREA)
PCT/JP2020/034557 2019-10-21 2020-09-11 分離装置及び分離システム Ceased WO2021079648A1 (ja)

Priority Applications (3)

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US17/769,976 US12257537B2 (en) 2019-10-21 2020-09-11 Separating device and separating system
JP2021554154A JP7557840B2 (ja) 2019-10-21 2020-09-11 分離装置及び分離システム
EP20879017.0A EP4049739B1 (en) 2019-10-21 2020-09-11 Separating device and separating system

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JP2019192108 2019-10-21
JP2019-192108 2019-10-21

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JPWO2021079648A1 (https=) 2021-04-29
US20220379251A1 (en) 2022-12-01
EP4049739B1 (en) 2024-07-24
US12257537B2 (en) 2025-03-25
EP4049739A4 (en) 2022-11-30
EP4049739A1 (en) 2022-08-31

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