WO2018222047A4

WO2018222047A4 - Cyclone processor

Info

Publication number: WO2018222047A4
Application number: PCT/NO2018/000012
Authority: WO
Inventors: A mundsen ATÅLE
Original assignee: Standard Bio As
Priority date: 2017-06-02
Filing date: 2018-06-04
Publication date: 2019-01-03
Also published as: NO343536B1; WO2018222047A1; NO20170913A1

Abstract

The invention describes a cyclone processor comprising a cyclone head and a cone mounted under the cyclone head. The cyclone head (1) comprises a top plate (4) with an upper exit hole (3) in the middle and a ring (5) of inwardly directed air knives (6) comprising slits (7). The ring being mounted on the underside of the top plate (3) wherein most of the air knives are directed in the same direction, whereby a cyclonic movement of the air can be initiated and maintained. Furthermore the cyclone head comprises an inner tube (13) extending down into the cone, up through the upper exit hole in the top plate, and at least one material feeder (14). The cone comprises a top flange (11) attached to the bottom plate (9), a conical hollow body (39) and a lower hole (15) having a smaller diameter than the diameter of the inner tube (13). High air velocity, low pressure and high degree of turbulence are formed in the cyclone by at least one air supply (12) connected to a blower (23) blowing air into the outer annulus (10) in a direction close to a tangent of the ring (5) of air knives (6), a suction unit (22) mounted to provide suction from the top of the inner pipe and the flow area on the outside of a lower rim of the inner pipe (13) is approximately equal to the flow area of the inner pipe.

Claims

AMENDED CLAIMS received by the International Bureau on 10 December 2018 (10.12.2018)

1. A cyclone processor comprising a cyclone head (1) and a cone (2) mounted under the cyclone head, wherein the cyclone head (1) comprises: a top plate (4) with an upper exit hole (3) in the middle,

a ring (5) of inwardly directed air knives (6) comprising a compact material with slits (7), the ring being mounted on the underside of the top plate (3) in a near symmetrical and equidistant manner relative to the vertical centerline of the cyclone, wherein most of the air knives is directed in the same direction relative to a tangent of the ring (5) of air knives (6), whereby a cyclonic movement of the air can be initiated and maintained,

an outer wall (8) equidistant from the ring (5) of air knives (6),

an annular bottom plate (9) which at least covers the bottom of an outer annulus (10) formed together with the ring of air knives, the outer wall and the top plate

(4) ,

wherein the bottom plate (9) is attached to the outer wall, the ring of air knives (6) and the top of the cone (2),

an inner tube (1 ) extending down into the cone, up through the upper exit hole in the top plate, and

at least one material feeder (14) in the top plate, in the air supply or in the ring

(5) of air knives (6), and the cone comprises a top flange (11) attached to the bottom plate (9) near the ring (5) of air knives, a conical hollow body (39) and

a lower hole (15) having a smaller diameter than the diameter of the inner tube (13), characterized by

^• at least one air supply (12) connected to a blower (23) blowing air into the outer annulus (10) in a direction close to a tangent of the ring (5) of air knives (6),

· a suction unit (22) mounted to provide suction from the top of the inner pipe,

• the flow area between the cone and the lower rim of the inner pipe (13) being approximately equal to the flow area of the inner pipe. 26

2. Cyclone processor according to claim 1, wherein the cyclone head (1) further comprises: an additional inner ring (25) of outward directed air knives (26) mounted equidistant from the existing (outer) ring (5) of air knives (6), wherein the annular space between the two sets of air knives (6) is forming a process chamber (24) and wherein most of the air knives on the inner ring (25) are directed in the same direction as the air knives in the outer ring (5), thus maintaining the cyclonic movement of the air,

a lower annular plate (27) and an inner cylindrical plate (28) which forms an inner annulus (29) together with the top plate (4) and the inner ring (25) of air knives (26), the inner annulus 29 being airtight except for the air that passes through the air knives and

at least one air inlet connected to a blower (23) which blows air into the inner annulus (29),

3. A cyclone processor according to claim 1, wherein an outlet separator (18) is provided below the lower hole (15) comprising: an outlet cylinder (19) mounted on the lower hole in a downward direction and of corresponding diameter,

a circular vortex turner (20) with a diameter less than the lower hole (15), and a lower cone (21) with apex pointing upwards, a diameter equal to or greater than the diameter of the outlet cylinder (19), an apex angle of about 90 degrees, and wherein the bottom of the lower cone (21) is below the bottom of the outlet cylinder (1 ).

4. Cyclone processor according to claim 3, wherein the lower cone (21) is mounted in an adjustable manner to the outlet cylinder (19) with at least two outer threaded bars (35) and wherein the circular vortex turner (20) are attached to a center rod (36) ) which is adjustably attached to the lower cone (21).

5. Cyclone processor according to claim 3, wherein a lower central pipe (32) is mounted through the center of the circular vortex turner (20) and the lower cone (21) to reduce airflow between the wall of the outlet cylinder (19) and the vortex turner (20).

6. Cyclone processor according to claim 1, wherein structures are arranged on the 27 underside of the top plate (4) between the outer ring (5) of the air knife (6) and the inner pipe (13) or between the outer ring (5) of the air knife (6) and the inner ring (25) of air knives (26) if it exists.

7. Cyclone processor according to claim 1, wherein an additional, smaller ring (5) of air knives (6) is mounted on the cone at a distance from the top of the cone.

8. Cyclone processor according to claim 1, wherein the air knives are made up of a plurality of separate knife sections (30) which together form a circle containing slits (7).

9. Cyclone processor according to claim 1, wherein the slits (7) have an angle relative to the tangent of the ring (5, 25) between 5 and 30 degrees, more preferably between 10 and 20 degrees.

10. Cyclone processor according to claim 1, wherein different structures (37) are mounted on the air knife sections to influence the air flow.

11. Cyclone processor according to claim 1 and 10, wherein the structures (37) mounted to the air knife sections (30) on the side facing the processing space are

Coanda surfaces (37) which are adjacent to the slit downstream thereof.

12. Cyclone processor according to claims 1, wherein Coanda surfaces (37) are mounted upstream on the side of the ring (5, 25) of air knives (6, 26) facing away from the processing chamber (24).

13. The cyclone processor according to claim 1, wherein the cone (2) is divided into an upper (16) and lower (17) section, the upper section (16) having a larger apex angle than the lower (17).

14. Cyclone processor according to claim 1, wherein the cone (2) has one or more additional cylindrical or conical sections.

15. Cyclone processor according to claim 1, wherein the inner pipe (13) is provided with a vertical vortex block (34) which prevents the air from circulating in the inner pipe. 28

16. Cyclone processor according to claim 1, wherein the inner pipe (13) is adjustable in the vertical direction.

17. Cyclone processor according to claims 1 and 2, wherein the inner ring (25) of air knives (6) has a shorter vertical height than the outer ring (5) of knives.

18. A cyclone processor according to claims 1, wherein the pressure in the processing chamber (24) is between 1 and 2 bar.

19. Cyclone processor according to claims 1, wherein the processing chamber (24) is coated with a durable coating.

20. Cyclone processor according to claim 1, wherein the durable coating is silicon carbide or ceramic coating.

21. A cyclone processor according to claims 1 and 2, wherein at least one material feeder (14) is located in the top plate (4) just inside the outer ring 5 of air knife (6).

22. A cyclone processor according to claims 21, wherein the at least one material feeder (14) has a rectangular shape with two sides perpendicular to the flow direction.

23. Cyclone processor according to claim 1, wherein the air knives are provided with a adjustment piece (31) which controls the opening width and / or width of the gap (7) throughout its length.

24. Cyclone processor according to claim 22, wherein the adjustment piece ( 1) has a shape at the end which enters the processing space as a Coandaflate or a pointed angle.

25. Cyclone processor according to claim 1, wherein a spoiler plate (38) is placed in the top plate just upstream of a feed opening 14 so that a suction at the feed opening

(14) occurs.

26. A cyclone processor according to claim 1, wherein a spoiler plate (38) is placed in the top plate between an air knife (6,26) facing a feed opening and the feed opening such that a suction at the feed opening (14) is obtained.

27. A method for starting and setting the cyclone processor according to claims 1 - 4, 29 comprising the following steps: starting the blower and suction unit without feeding and with the inner pipe (13) and the vortex (20) in the upper position and lower cone (21) in the lower position,

letting the blower and suction unit (22) run until the working temperature stabilizes,

regulating the blower and the suction unit such that there is a pressure in the cyclone processor of between 1 and 2 bar, more preferably between 1.3 and 1.6 bar,

starting the feeder,

lowering the inner pipe downward until an approximately desired fraction comes out of the outlet separator (18)

setting the vortex turner down to the lower hole until a desired fraction comes out,

setting the lower cone upwards to partially throttle the air supply so that more smaller particles exit through the lower hole (15) and the pressure drops in the cyclone processor.