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Multi-stage axial flow cyclone separator

  • US 10,639,651 B2
  • Filed: 02/08/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 06/02/2015
  • Status: Active Grant
First Claim
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1. A multi-stage axial flow cyclone separator comprising:

  • a primary swirl creating section (1) comprising an outer structure (4) having an open end and an inside fluid distribution chamber (5) for distributing fluid received from a primary fluid inlet (6) formed as at least one hole on a lateral side of the outer structure (4) or as at least one tube extending from the lateral side of the outer structure (4) for serving as ports for transferring fluid to the fluid distribution chamber (5) for transferring to a primary swirl generating chamber (7) of an apparatus for creating a swirling flow (8) mounted inside the outer structure (4),wherein the apparatus for creating a swirling flow (8) is formed as an axial structure placed wholly or partially inside the outer structure (4) wherein the inside thereof is formed as a cylindrical primary swirl generating chamber (7) and having at least one lateral side penetrable hole (9) for transferring fluid to the primary swirl generating chamber (7), an edge surface next to the lateral side penetrable hole (9) is a convex surface c wherein a beginning of the convex surface has a minimal angle to an emerging axis a of the lateral side penetrable hole (9) and the convex surface c is closer compared with other surfaces surrounding the emerging axis a of the lateral side penetrable hole (9), wherein the composition of said lateral side penetrable hole (9) and the convex surface c of the edge surface next to the lateral side penetrable hole (9) is in accordance with a Coanda profile wherein fluid through the penetrable hole is deflected to the convex surface c creating a Coanda effect inducing the fluid in the primary swirl generating chamber (7) to flow along a flow line A in a laminar manner on a plane of the curved surface c such that a laminar swirling flow is formed in the primary swirl generating chamber (7);

    a swirl acceleration section (2) comprising an outer structure (14) having an open end in fluid communication with the primary swirl creating section (1) and an inside fluid distribution chamber (15) for distributing fluid received from a fluid inlet (16) formed as at least one hole on a lateral side of the outer structure (14) or at least one tube extending from the lateral side of the outer structure (14) for serving as ports for transferring fluid to the fluid distribution chamber (15) for transferring to a swirl acceleration chamber (17) of an apparatus for accelerating a swirling flow (18),wherein the apparatus for accelerating a swirling flow (18) is formed as an axial structure disposed wholly or partially inside the outer structure (14) having an inside conic swirl acceleration chamber (17) for receiving fluid from the fluid distribution chamber (15) and having at least one lateral side penetrable hole (19) on a lateral side of the apparatus for accelerating a swirling flow (18) for serving as inlets for fluid flowing from the fluid distribution chamber (15) into the swirl accelerating chamber (17),wherein an edge surface of the lateral side penetrable hole is a convex surface, a beginning of the convex surface having a minimal angle to an emerging axis of the lateral side penetrable hole (19) and the convex surface c′

    is closer compared with other surfaces surrounding the emerging axis a′

    of the side penetrable hole (19) wherein a composition of said lateral side penetrable hole (19) and the convex surface c′

    is in accordance with a Coanda profile wherein fluid pressed through the penetrable hole is deflected to the convex surface c′

    creating a Coanda effect inducing the fluid in the swirl accelerating chamber transferred from the primary swirl creating section (1) to flow along a flow line A′

    in a laminar manner on a plane of the convex surface c′

    such that a laminar swirling flow is formed in the swirl accelerating chamber (17), wherein a diameter of an upstream open end is larger than that of a downstream open end of a transmission base of the apparatus for accelerating the swirling flow (18), wherein the acceleration of the fluid is increased as a circumference is shortened along the slope of a conic base of the apparatus for accelerating the swirling flow (18) before the fluid is transferred to a fluid separation section (3); and

    the fluid separation section (3) comprising an outer structure (22) having an open end in fluid communication with the swirl acceleration section (2) and an inside space (23) for gathering a heavy phase of the fluid for transfer through a lateral side outlet (24) formed as at least one hole on a lateral side of the outer structure (22.) or at least one tube extending from the lateral side of the outer structure (22) for serving as ports for transferring the heavy phase fluid, and a fluid transfer tube (25) axially mounted in a center inside the outer structure (22),wherein the fluid transfer tube (25) is formed as a cylindrical tube having an inside cylindrical cavity (26) for serving as an outlet of light phase fluid and to provide an annulus space (27), wherein a diameter of the fluid transfer tube (25) is smaller than a circular hole formed on a center of the outlet open end of the swirl acceleration section (2), and wherein the annulus space (27) serves as a space for fluid separation for separating heavy phase fluid and transferring the fluid to the fluid gathering space (23).

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