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A vortex finder for a cyclone separator, comprising a plurality of superposed rings each including a plurality of suspended plate segments. Each of the plate segments includes a main plate having radially offset upper and lower end portions, opposite inner and outer faces, an upper support member in

A vortex finder for a cyclone separator, comprising a plurality of superposed rings each including a plurality of suspended plate segments. Each of the plate segments includes a main plate having radially offset upper and lower end portions, opposite inner and outer faces, an upper support member integrally formed with the upper end portion to protrude from the outer face, and a lower support member integrally formed with the lower end portion to protrude from the inner face. The upper support member of the plate segments of the one of the rings engages and is supported by the lower support member of the plate segments of another of the rings positioned above the one of the rings. The lower support member defines an open-bottom pocket having at least one pass-through opening for fluidly connecting a space inside the vortex finder with a space outside the vortex finder.

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1. A vortex finder for a cyclone separator, said vortex finder being suspended from a top end of said cyclone separator, said vortex finder comprising: a central axis; anda plurality of superposed, circumferentially extending rings coaxial to said central axis and assembled so as to form said vortex

1. A vortex finder for a cyclone separator, said vortex finder being suspended from a top end of said cyclone separator, said vortex finder comprising: a central axis; anda plurality of superposed, circumferentially extending rings coaxial to said central axis and assembled so as to form said vortex finder;each of said rings comprising a plurality of substantially identical plate segments positioned at the same level so as to form said ring;said plate segments of one of said rings being suspended under the force of gravity from said plate segments of another of said rings positioned above said one of said rings for connecting said plate segments of each said ring to one another;each of said plate segments including a non-flat main plate having an upper end portion and a lower end portion radially offset from said upper end portion, an upper support member integrally formed with said upper end portion of said main plate so as to face away from said central axis and a lower support member integrally formed with said lower end portion of said main plate so as to face said central axis, wherein said main plate further comprises a central portion, said upper end portion and said lower end portion extend substantially parallel to said central axis and said central portion is oriented obliquely relative to said upper end portion and said lower end portion to provide said offset;said upper support member of said plate segments of said one of said rings engaging and supported by said lower support member of said plate segments of said another of said rings positioned above said one of said rings;said lower support member defining an open-bottom pocket having at least one pass-through opening for fluidly connecting a space inside said vortex finder with a space outside said vortex finder. 2. The vortex finder as defined in claim 1, wherein said main plate is radially bent in a plane orthogonal to said central axis. 3. The vortex finder as defined in claim 1, wherein said plate segments of one said rings have different size than said plate segments of another of said rings positioned adjacent to said one of said rings. 4. A vortex finder for a cyclone separator, said vortex finder being suspended from a top end of said cyclone separator, said vortex finder comprising: a central axis; anda plurality of superposed, circumferentially extending rings coaxial to said central axis and assembled so as to form said vortex finder;each of said rings comprising a plurality of substantially identical plate segments positioned at the same level so as to form said ring;said plate segments of one of said rings being suspended under the force of gravity from said plate segments of another of said rings positioned above said one of said rings for connecting said plate segments of each said ring to one another;each of said plate segments including a non-flat main plate having an upper end portion and a lower end portion radially offset from said upper end portion, an upper support member integrally formed with said upper end portion of said main plate so as to face away from said central axis and a lower support member integrally formed with said lower end portion of said main plate so as to face said central axis,wherein a height of said plate segments of one said rings is equal or greater than the height of said plate segments of another of said rings positioned above said one of said rings. 5. The vortex finder as defined in claim 1, wherein said upper support member having a downwardly protruding upper flange radially spaced from a radially outer face of said main plate and an upper connecting portion integrally connecting said upper flange to said upper end portion of said main plate; and wherein said lower support member having an upwardly protruding lower flange radially spaced from a radially inner face of said main plate and a lower connecting portion integrally connecting said lower flange to said lower end portion of said main plate so as to form said at least one pass-through opening between said lower flange of said lower support member and said inner face of said main plate and defining an open-bottom pocket at said lower end portion of said main plate of said plate segments. 6. The vortex finder as defined in claim 5, wherein said lower end portion of said main plate is radially offset from said upper end portion thereof so that said upper flange of said upper support member is aligned with a space between said lower flange of said lower support member and said lower end portion of said main plate. 7. The vortex finder as defined in claim 5, wherein said lower end portion of said main plate of said plate segments of one said rings is radially offset from said upper end portion thereof so that said upper flange of said upper support member of said plate segments of one of said rings is disposed in a space between said lower flange of said lower support member and said lower end portion of said main plate of said plate segments of another of said rings positioned above said one of said rings. 8. The vortex finder as defined in claim 5, wherein a cross section of said upper flange is smaller than an area of said at least one pass-through opening. 9. The vortex finder as defined in claim 5, wherein said upper flange of said upper support member of said plate segment of said one of said rings is disposed in said open-bottom pocket of said plate segment of said another of said rings positioned above said one of said rings. 10. The vortex finder as defined in claim 1, wherein each of said plate segments is a unitary metal part. 11. The vortex finder as defined in claim 10, wherein each of said unitary metal part is coated with ceramic material. 12. A plate segment of a vortex finder, said plate segment comprising: a non-flat main plate having an upper end portion, a lower end portion radially offset from said upper end portion, a central portion disposed between said upper end portion and said lower end portion, and opposite radially inner and outer faces, wherein said upper end portion and said lower end portion extend substantially parallel the said central axis and said central portion is oriented obliquely relative to said upper end portion and said lower end portion to provide said offset;an upper support member integrally formed with said upper end portion of said main plate so as to protrude from said outer face; anda lower support member integrally formed with said lower end portion of said main plate so as to protrude from said inner face;said lower support member defining an open-bottom pocket having at least one pass-through opening. 13. The plate segment as defined in claim 12, wherein said upper support member having a downwardly protruding upper flange radially spaced from said outer face of said main plate and an upper connecting portion integrally connecting said upper flange to said upper end portion of said main plate; and wherein said lower support member having an upwardly protruding lower flange radially spaced from said inner face of said main plate and a lower connecting portion integrally connecting said lower flange to said lower end portion of said main plate so as to form said at least one pass-through opening between said lower flange of said lower support member and said inner face of said main plate. 14. The plate segment as defined in claim 13, wherein said lower end portion of said main plate is radially offset from said upper end portion thereof so that said upper flange of said upper support member is aligned with a space between said lower flange of said lower support member and said lower end portion of said main plate. 15. The plate segment as defined in claim 13, wherein a cross section of said upper flange is smaller than an area of said at least one pass-through opening. 16. The plate segment as defined in claim 13, wherein said upper flange of said upper support member is aligned with said at least one pass-through opening in said lower support member. 17. The vortex finder as defined in claim 13, wherein each of said plate segments is a unitary metal part. 18. The vortex finder as defined in claim 17, wherein each of said unitary metal part is coated with ceramic material. 19. The plate segment as defined in claim 13, wherein said plate segment is provided with at least two reinforcing ribs formed unitarily with said main plate both on said outer and inner faces of said main plate. 20. The plate segment as defined in claim 19, wherein said plate segment is provided with three reinforcing ribs formed unitarily with said main plate on said inner face of said main plate. 21. The plate segment as defined in claim 19, wherein said plate segment is provided with at least two reinforcing ribs formed on said upper connecting portion of said upper support member. 22. The vortex finder as defined in claim 13, wherein each of said plate segments has four lower connecting portions integrally connecting said lower flange to said lower end portion of said main plate forming three pass-through opening between said lower connecting portions, said lower flange of said lower support member and said inner face of said main plate.