CYCLONE WITH ROTATING ROD BASKET

Abstract

A cyclone separator wherein the tapered tip of the conical hollow body faces downwards. The air separator has at least one immersion tube which abuts the conical wall of the conical hollow body and which protrudes upwards within the conical hollow body, the conical hollow body tapered tip which faces downwards being connected to an outlet for fine material. The first cylindrical hollow body is equipped with a rotating rod basket which is enclosed by a static circular conveyor trough for coarse material, the conveyor trough resting against the lower outer circumference without contacting same. The conveyor trough for coarse material is connected to an outlet out of the cylindrical hollow body, and the volume enclosed by the rod basket is fluidically connected to the conical hollow body.

Claims

1-9. (canceled)

10. A cyclone air separator for separating granular material which is intended to be separated and which is suspended in a conveying gas, comprising a first, cylindrical hollow member with a cylindrical form and which has a tangential to helical inlet with respect to the cylindrical form for the conveying gas which carries the material to be separated, a second, conical hollow member which is located under the first, cylindrical hollow member and which is connected directly to the first, cylindrical hollow member, wherein a tapered tip of the second, conical hollow member is directed downward, at least one immersion pipe which extends through a conical wall of the second, conical hollow member and which projects upward inside the second, conical hollow member and the opening of which is arranged in a volume of the first, cylindrical hollow member, wherein, the downwardly directed, tapered tip of the second, conical hollow member is connected to an outlet for fine material, wherein a rotating rod basket which is surrounded by a static and circular conveying channel which abuts but does not touch a lower external circumference for coarse material is arranged in the first, cylindrical hollow member, wherein the conveying channel for coarse material is connected to an outlet out of the first, cylindrical hollow member, and the volume which is surrounded by the rod basket is connected in terms of flow to the second, conical hollow member.

11. The cyclone air separator as claimed in claim 10, wherein the first, cylindrical hollow member extends as far as a location under the rod basket and has under the rod basket a height which corresponds to between 50% and 150% of the height of the second, conical hollow member.

12. The cyclone air separator as claimed in claim 10, wherein a diameter of the immersion pipe corresponds to between 20% and 60% of an internal diameter of the first, cylindrical hollow member.

13. The cyclone air separator as claimed in claim 10, wherein the rod basket has a drive, a drive shaft of which projects from above into the first, cylindrical hollow member.

14. The cyclone air separator as claimed in claim 10, wherein a substantially conical member, whose tapered tip is directed upward, is arranged above the opening of the immersion pipe, wherein helically formed guiding plates whose winding direction corresponds to a rotation direction of the rod basket are provided on an external surface of the substantially conical member.

15. The cyclone air separator as claimed in claim 14, wherein the substantially conical member is retained by spokes inside the first, cylindrical hollow member, wherein the spokes are connected to a wall of the first, cylindrical hollow member, and wherein a vertical position of the substantially conical member is adjustable above the immersion pipe, in which a position of the spokes in the wall of the first, cylindrical hollow member is vertically adjustable by elongate holes.

16. The cyclone air separator as claimed in claim 14, wherein the substantially conical member is connected to the rod basket via a shaft and also rotates with the rod basket.

17. The cyclone air separator as claimed in claim 10, wherein a substantially annular member is arranged above the opening of the immersion pipe, wherein helically formed guiding plates whose winding direction corresponds to a rotation direction of the rod basket are provided on an internal surface of the substantially annular member.

18. The cyclone air separator as claimed in claim 17, wherein the substantially annular member is connected to a wall of the cylindrical member, wherein the vertical position of the substantially annular member above the immersion pipe can be adjusted by means of bolts which extend through elongate holes in the wall of the cylindrical member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The invention is explained in greater detail with reference to the following

[0017] Figures. In the drawings:

[0018] FIG. 1 shows a first variant of a cyclone according to the invention with a rotating rod basket,

[0019] FIG. 2 shows a second variant of a cyclone according to the invention with a rotating rod basket,

[0020] FIG. 3 shows a third variant of a cyclone according to the invention with a rotating rod basket,

[0021] FIG. 4 is a broken-away view from above of the first variant according to FIG. 1,

[0022] FIG. 5 is a broken-away view from above of the first variant according to FIG. 2,

[0023] FIG. 6 shows a rotating rod basket with a vortex, wherein the vortex is not expanded by guiding plates,

[0024] FIG. 7 shows a rotating rod basket with a vortex, wherein the vortex is expanded by guiding plates according to the second and third variants from FIG. 2 and FIG. 3,

[0025] FIG. 8 shows a rotating rod basket with a vortex, wherein the vortex is expanded by guiding plates according to the first variant of FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] FIG. 1 schematically shows a broken-away side view of a first variant of a cyclone 100 according to the invention with a rotating rod basket 150. This cyclone air separator 100 for separating granular material which is intended to be separated and which is suspended in a conveying gas 10 has the following part-elements: initially, a first, cylindrical hollow member 110 with a tangential to helical inlet 115 with respect to the cylindrical form for the conveying gas 10 which carries the material to be separated. The conveying gas 10 flows into this tangential to helical inlet 115 and, at that location, strikes a rod basket 150 in a tangential direction/helical direction. The rod basket 150 is rotated by a drive 160 via a drive shaft 161. A second, conical hollow member 120 which is directly connected to the first, cylindrical hollow member 110 is located under the first, cylindrical hollow member 110, wherein the tapered tip 125 of the second, conical hollow member 120 is directed downward. An immersion pipe 130 which projects upward inside the second, conical hollow member 120 and the opening 135 of which is arranged in the volume of the first, cylindrical hollow member 110 extends through the conical wall 126 of the second, conical hollow member 120. The downwardly directed, tapered tip 125 of the second, conical hollow member 120 is connected to an outlet 127 for fine material F. The rotating rod basket 150 which is arranged in the first, cylindrical hollow member 110 is surrounded by a static and circular conveying channel 152, which abuts but does not touch the lower external circumference 151, for coarse material G, wherein the conveying channel 152 for coarse material G is connected to an outlet 153 from the first, cylindrical hollow member 110. The volume which is surrounded by the rod basket 150 is connected in terms of flow to the second, conical hollow member 120. During operation, the conveying gas 10 flows into the lateral, tangential or helical inlet 115 and, at that location, strikes the rotating rod basket 150 in a manner pre-accelerated by the flow speed in a tangential or helical manner In this case, the rotation direction of the rotating rod basket is selected so that the tangential to helical flow corresponds to the rotation direction. During the flow around the rotating rod basket 150, conveying gas and fine material F flow through the individual rods of the rotating rod basket 150 and thus reach the internal volume which is surrounded by the rod basket 150. However, coarse material G is thrown outwardly by the centrifugal force and, where applicable, thrown back by the rods of the rod basket 150. As a result of gravitational force, the coarse material G falls into the conveying channel 152 for coarse material G and rolls or trickles there to the outlet 153, whereby the coarse material leaves the cyclone with a rotating rod basket 150. The carrier gas 10 with fine material F located in the volume surrounded by the rod basket 150 flows with a moment of momentum provided by the rotating rod basket 150 downward into the lower portion of the first, cylindrical hollow member 110.

[0027] At that location, in the lower portion of the first, cylindrical hollow member 110, in this first variant of the cyclone with a rotating rod basket 150 the carrier gas 10 flows with fine material F suspended therein past guiding plates 192 which are arranged in the manner of vanes of an inverse impeller. These guiding plates 192 are arranged above the opening 135 of the immersion pipe 130 along a substantially annular member 190, on the internal surface Oi of a substantially annular member 190. At that location, the helically formed guiding plates 192 whose winding direction corresponds to the rotation direction of the rod basket 150 are provided. In this variant, the helical guiding plates 192 project from the wall of the first, cylindrical hollow member 110 inwardly, but leave an opening free at the center of the first, cylindrical hollow member 110 so that the guiding plates 192 are arranged in the manner of impeller vanes of an impeller without any central spinner. These guiding plates 192 which are external for the vortex comprising carrier gas 10 and fine material F allow the vortex to expand and to merge, with pre-acceleration, into the second, conical hollow member 120 of the cyclone, where the expanded vortex is tapered by the cone again and the fine material F is thrown out of the vortex by the acceleration during the tapering of the vortex. The carrier gas 10 which is free from fine material F subsequently flows into the upper opening 135 of the immersion pipe 130, whereas the fine material F collects on the lower tapered tip 125 of the second, conical hollow member 120 and, at that location, is discharged from the outlet 127 as a result of gravitational force.

[0028] For an optimized form of the cyclone with a rotating rod basket 150, it has been found that such a form, in which the first, cylindrical hollow member 110 extends as far as a location under the rod basket 150 and under the rod basket 150 has a height h1 which corresponds to between 50% and 150% of the height h2 of the second, conical hollow member 120, works well. At this height ratio, it is possible for the diameter d1 of the immersion pipe 130 to have between 20% and 60%, preferably between 30% and 50% of the internal diameter d2 of the first, cylindrical hollow member 110. This very large diameter for an immersion pipe allows operation of the cyclone with a rotating rod basket 150 which produces a comparatively small pressure loss.

[0029] FIG. 2 schematically shows a second variant of a cyclone 200 according to the invention with a rotating rod basket 150 as a broken-away side view. This cyclone air separator 200 for separating granular material which is intended to be separated and which is suspended in a conveying gas 10 has the following part-elements: initially, a first, cylindrical hollow member 110 having a tangential to helical inlet 115 with respect to the cylindrical shape for the conveying gas 10 which carries the material to be separated. The conveying gas 10 flows into this tangential to helical inlet 115 and, at that location, strikes a rod basket 150 in a tangential direction/helical direction. The rod basket 150 is rotated by a drive 160 via a drive shaft 161. Under the first, cylindrical hollow member 110 there is located a second, conical hollow member 120 which is directly connected to the first, cylindrical hollow member 110, wherein the tapered tip 125 of the second, conical hollow member 120 is directed downward. An immersion pipe 130 which projects upward inside the second, conical hollow member 120 and the opening 135 of which is arranged in the volume of the first, cylindrical hollow member 110 extends through the conical wall 126 of the second, conical hollow member 120. The downwardly directed, tapered tip 125 of the second, conical hollow member 120 is connected to an outlet 127 for fine material F. The rotating rod basket 150 which is arranged in the first, cylindrical hollow member 110 is surrounded by a static and circular conveying channel 152 which abuts but does not touch the lower external circumference 151 for coarse material G, wherein the conveying channel 152 for coarse material G is connected to an outlet 153 from the first, cylindrical hollow member 110. The volume which is surrounded by the rod basket 150 is connected to the second, conical hollow member 120 in terms of flow. During operation, the conveying gas 10 flows into the lateral, tangential or helical inlet 115 and, at that location, strikes the rotating rod basket 150 tangentially or helically in a manner pre-accelerated by the flow speed. In this case, the rotation direction of the rotating rod basket is selected so that the tangential to helical flow corresponds to the rotation direction. During the flow around the rotating rod basket 150, conveying gas and fine material F flow through the individual rods of the rotating rod basket 150 and thus reach the internal volume surrounded by the rod basket 150. However, the coarse material G is thrown outward by the centrifugal force and, where applicable, is thrown back by the rods of the rod basket 150. As a result of gravitational force, the coarse material G falls into the conveying channel 152 for coarse material G and rolls or trickles at that location to the outlet 153, whereby the coarse material leaves the cyclone with the rotating rod basket 150. The carrier gas 10 which is located in the volume which is surrounded by the rod basket 150 with fine material F flows with a moment of momentum which is provided by the rotating rod basket 150 downward into the lower portion of the first, cylindrical hollow member 110.

[0030] At that location, in the lower portion of the first, cylindrical hollow member 110, in this first variant of the cyclone with a rotating rod basket 150 the carrier gas 10 flows with fine material F suspended therein past a substantially conical member 180 and is expanded thereby. In this case, the substantially conical member 180 is arranged above the opening 135 of the immersion pipe 130, wherein the tapered tip 181 thereof is directed upwardly and wherein helically formed guiding plates 182, the winding direction of which corresponds to the rotation direction of the rod basket 150, are provided on the outer surface Ok of the substantially conical member 180. In the manner of a round pointed roof of a tower, the substantially conical member 180 extends into the vortex which is flowing downward out of the rod basket 150 and expands it, wherein the guiding plates 182 support the expansion of the vortex while maintaining a turbulent flow. In order to find the optimum expansion point, there is provision in this embodiment for the substantially conical member 180 to be retained by spokes 183 inside the first, cylindrical member 110. These spokes 183 are connected to the wall Wz of the first, cylindrical hollow member 110, wherein the vertical position of the substantially conical member 180 above the immersion pipe 130 is adjustable by the position of the spokes 183 in the wall Wz of the first, cylindrical hollow member 110 being vertically adjustable by means of elongate holes LL.

[0031] The fine material which flows through the expanded vortex into the second, lower conical hollow member 120 collects in the cone of the cyclone and falls out of the cyclone at the lower, tapered tip at the outlet 127. However, the carrier gas which is free of the fine material flows through the opening 135 in the immersion pipe 130 out of the cyclone.

[0032] FIG. 3 schematically shows a third variant of a cyclone 300 according to the invention with a rotating rod basket 150 as a broken-away side view. This cyclone air separator 300 for separating granular material which is intended to be separated and which is suspended in a conveying gas 10 has the following part- elements: initially, a first, cylindrical hollow member 110 having a tangential to helical inlet 115 with respect to the cylindrical shape for the conveying gas 10 which carries the material to be separated. The conveying gas 10 flows into this tangential to helical inlet 115 and, at that location, strikes a rod basket 150 in a tangential direction/helical direction. The rod basket 150 is rotated by a drive 160 via a drive shaft 161. Under the first, cylindrical hollow member 110 there is located a second, conical hollow member 120 which is directly connected to the first, cylindrical hollow member 110, wherein the tapered tip 125 of the second, conical hollow member 120 is directed downward. An immersion pipe 130 which projects upward inside the second, conical hollow member 120 and the opening 135 of which is arranged in the volume of the first, cylindrical hollow member 110 extends through the conical wall 126 of the second, conical hollow member 120. The downwardly directed, tapered tip 125 of the second, conical hollow member 120 is connected to an outlet 127 for fine material F. The rotating rod basket 150 which is arranged in the first, cylindrical hollow member 110 is surrounded by a static and circular conveying channel 152 which abuts but does not touch the lower external circumference 151 for coarse material G, wherein the conveying channel 152 for coarse material G is connected to an outlet 153 from the first, cylindrical hollow member 110. The volume which is surrounded by the rod basket 150 is connected to the second, conical hollow member 120 in terms of flow. During operation, the conveying gas 10 flows into the lateral, tangential or helical inlet 115 and, at that location, strikes the rotating rod basket 150 tangentially or helically in a manner pre-accelerated by the flow speed. In this case, the rotation direction of the rotating rod basket is selected so that the tangential to helical flow corresponds to the rotation direction. During the flow around the rotating rod basket 150, conveying gas and fine material F flow through the individual rods of the rotating rod basket 150 and thus reach the internal volume surrounded by the rod basket 150. However, the coarse material G is thrown outward by the centrifugal force and, where applicable, is thrown back by the rods of the rod basket 150. As a result of gravitational force, the coarse material G falls into the conveying channel 152 for coarse material G and rolls or trickles at that location to the outlet 153, whereby the coarse material leaves the cyclone with the rotating rod basket 150. The carrier gas 10 which is located in the volume which is surrounded by the rod basket 150 with fine material F flows with a moment of momentum which is provided by the rotating rod basket 150 downward into the lower portion of the first, cylindrical hollow member 110.

[0033] At that location, in the lower portion of the first, cylindrical hollow member 110, in this first variant of the cyclone with a rotating rod basket 150 the carrier gas 10 flows with fine material F suspended therein past a substantially conical member 180 and is expanded thereby. In this case, the substantially conical member 180 is arranged above the opening 135 of the immersion pipe 130, wherein the tapered tip 181 thereof is directed upwardly and wherein helically formed guiding plates 182, the winding direction of which corresponds to the rotation direction of the rod basket 150, are provided on the outer surface Ok of the substantially conical member 180. A particular feature of this variant is that the substantially conical member 180 is connected to the rod basket 150 via a shaft 185 and also rotates with the rod basket 150. As a result of the joint rotation, the substantially conical member 180 further imparts a rotation impulse to the vortex which flows out of the rod basket 150 during the expansion so that the rotation pulse of the vortex is not braked too powerfully during the expansion.

[0034] In this variant, it is also the case that the substantially conical member 180 which also rotates with the rod basket 150 extends into the vortex which is flowing downward out of the rod basket 150 and expands it in the manner of a round pointed roof of a tower, wherein the guiding plates 182 support the expansion of the vortex while maintaining a turbulent flow. The fine material which flows into the second, lower conical hollow member 120 as a result of the expanded vortex collects in the cone of the cyclone and falls out of the cyclone at the lower, tapered tip at the outlet 127. However, the carrier gas which is free from the fine material flows through the opening 135 in the immersion pipe 130 out of the cyclone.

[0035] FIG. 4 is a schematic plan view into the cyclone, which is broken away at the top, according to FIG. 1 with a rod basket 150. The conveying gas 10 with fine material F suspended therein is introduced into the tangential to helical inlet 115 in the first, cylindrical hollow member 110. At that location, it initially moves around the rotating rod basket 150, wherein the rotation direction of the rod basket 150 and the inwardly flowing carrier gas 10 correspond to each other. After the rotating rod basket 150 has been passed, the carrier gas flows into the internal volume which is surrounded by the rod basket 150 and, at that location, strikes the guiding plates 192 which are constructed in the manner of an inverse impeller, that is to say, in the manner of guiding plates as impeller wings which project in an inward direction and which leave a free passage at the center. In FIG. 1, there are depicted arrows which are intended to represent the vortex and which flow downward out of the rod basket 150, in this instance approximately into the center of the drawing. There is shown at the center of the drawing the opening 135 of the immersion pipe through which the carrier gas 10 which is free from fine material F flows.

[0036] FIG. 5 is a schematic plan view into the cyclone, which is broken away at the top, according to FIG. 2 with a rod basket 150. The conveying gas 10 with fine material F suspended therein is introduced into the tangential to helical inlet 115 in the first, cylindrical hollow member 110. At that location, it initially moves around the rotating rod basket 150, wherein the rotation direction of the rod basket 150 and the inwardly flowing carrier gas 10 correspond to each other. After the rotating rod basket 150 has been passed, the carrier gas flows into the internal volume which is surrounded by the rod basket 150 and, at that location, strikes the guiding plates 182 of a substantially conical member which extends into the downwardly flowing vortex (here, at the center of the drawing) and expands the vortex with the guiding plates 182 which are located on the roof surface of the substantially conical member 180. In this case, the substantially conical member 180 acts in the manner of a roof surface by means of the opening 135 (covered in this case) of the immersion pipe 130.

[0037] FIG. 6 illustrates a rotating rod basket 150 with a vortex W which flows downward out of the rod basket 150, wherein the vortex W is not expanded by guiding plates or other measures which control the flow. Without a guiding plate arrangement, the vortex W would flow downward in the manner of a tornado and would taper in this case, and flow directly out of the rod basket into the opening of an immersion pipe which is located under the rod basket 150 and which is not shown here.

[0038] FIG. 7 illustrates a rotating rod basket 150 with a vortex W which flows downward out of the rod basket 150, wherein the vortex W is expanded in this illustration by guiding plates 182 of a substantially conical member 180 according to the variants in FIG. 2 and FIG. 3. The expanded vortex W leaves free space for an immersion pipe which is not shown here with a relatively great diameter without the vortex W flowing directly into an immersion pipe which is located under the rod basket 150.

[0039] While at least one exemplary embodiment of the present invention(s) is disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the terms “comprise” or “comprising” do not exclude other elements or steps, the terms “a” or “one” do not exclude a plural number, and the term “or” means either or both. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise. This disclosure hereby incorporates by reference the complete disclosure of any patent or application from which it claims benefit or priority.

LIST OF REFERENCE NUMERALS

[0040] 10 Conveying gas [0041] 111 Exhaust air [0042] 100 Air separator [0043] 110 Cylindrical hollow member [0044] 115 Inlet [0045] 120 Conical hollow member [0046] 125 Tapered tip [0047] 126 Conical wall [0048] 127 Outlet [0049] 130 Immersion pipe [0050] 135 Opening [0051] 150 Rod basket [0052] 151 Lower external circumference [0053] 152 Conveying channel [0054] 153 Outlet [0055] 160 Drive [0056] 161 Drive shaft [0057] 180 Substantially conical member [0058] 181 Tapered tip [0059] 182 Guiding plate [0060] 183 Spoke [0061] 185 Shaft [0062] 190 Substantially annular member [0063] 192 Guiding plate [0064] 200 Air separator [0065] 300 Air separator [0066] B Bolt [0067] d.sub.1 Diameter [0068] d.sub.2 Diameter [0069] F Fine material [0070] G Coarse material [0071] h.sub.1 Height [0072] h.sub.2 Height [0073] LL Elongate hole [0074] O.sub.k Outer surface [0075] O.sub.i Inner surface [0076] O.sub.z Surface [0077] W Vortex [0078] W.sub.z Wall