Apparatus and method of separating and concentrating organic and/or non-organic material

• US 7,540,384 B2
• Filed: 08/08/2005
• Issued: 06/02/2009
• Est. Priority Date: 10/12/2004
• Status: Active Grant

• Current Assignee: Rainbow Energy Center LLC
• Original Assignee: Great River Energy
• Inventors: Levy, Edward K, Coughlin, Matthew P, Sarunac, Nenad, Ness, Mark A, Wheeldon, John M.
• Primary Examiner(s): Mackey; Patrick H
• Assistant Examiner(s): MATTHEWS, TERRELL HOWARD
• Application Number:
  US11/199,743
• Publication Number:
  US 20060199134A1
• Time in Patent Office: 1,394 Days
• Field of Search: 209/133, 209/134, 209/143, 209/147
• US Class Current: 209/134
• CPC Class Codes: B03B 4/06 using fixed and inclined tables ; using stationary pneumatic tables, e.g. fluidised beds
• CPC Class Codes: F23K 1/04 Heating fuel prior to delivery to combustion apparatus
• CPC Class Codes: F23K 2201/20 Drying
• CPC Class Codes: F23K 2201/30 Separating
• CPC Class Codes: F23K 2900/01001 Cleaning solid fuel before combustion to achieve reduced emissions

Abstract

An apparatus for segregating particulate by density and/or size including a fluidizing bed having a particulate receiving inlet for receiving particulate to be fluidized. The fluidized bed also includes an opening for receiving a first fluidizing stream, an exit for fluidized particulate and at least one exit for non-fluidized particulate. A conveyor is operatively disposed in the fluidized bed for conveying the non-fluidized particulate to the non-fluidized particulate exit. A collector box is in operative communication with the fluidized bed to receive the non-fluidized particulate. There is a means for directing a second fluidizing stream through the non-fluidized particulate as while it is in the collector box to separate fluidizable particulate therefrom.

Claims

1. An apparatus for segregating particulate material by density and/or size to concentrate a contaminant for separation from the particulate material feed stream, comprising:

(a) a fluidizing bed having a receiving inlet for receiving the particulate material feed, an inlet opening for receiving a fluidizing stream, a discharge outlet for discharging a fluidized particulate material product stream, and a discharge outlet for discharging a non-fluidized particulate material stream;

(b) a source of fluidizing stream operatively connected to the inlet opening for introducing the fluidizing stream into the fluidizing bed to achieve separation of the fluidized particulate material product stream from the non-fluidized particulate material stream;

(c) a conveyor means for transporting the non-fluidized particulate material inside the fluidized bed through the discharge outlet to a reception means;

(d) wherein the fluidized particulate material product stream contains a reduction in the contaminant relative to the particulate material feed of about 23-54%, and the non-fluidized particulate material stream contains about 9-45% of the contaminant contained in the particulate material feed.

2. The particulate material segregating apparatus of claim 1, wherein the particulate material is coal.

3. The particulate material segregating apparatus of claim 1, wherein the contaminant is selected from the group consisting of fly ash, sulfur, mercury, and ash.

4. The particulate material segregating apparatus of claim 3, wherein the reduction of fly ash in the particulate material product stream is about 23-43%.

5. The particulate material segregating apparatus of claim 3, wherein the reduction of sulfur in the particulate material product stream is about 25-51%.

6. The particulate material segregating apparatus of claim 3, wherein the reduction of mercury in the particulate material product stream is about 27-54%.

7. The particulate material segregating apparatus of claim 1, wherein the fluidizing stream is air.

8. The particulate material segregating apparatus of claim 1, wherein the fluidizing stream is steam.

9. The particulate material segregating apparatus of claim 1, wherein the fluidizing stream is an inert gas.

10. The particulate material segregating apparatus of claim 1, wherein the fluidizing stream is heated by a heat source prior to its introduction to the fluidizing bed.

11. The particulate material segregating apparatus of claim 10, wherein the heat source is a primary heat source.

12. The particulate material segregating apparatus of claim 10, wherein the heat source is a waste heat source.

13. The particulate material segregating apparatus of claim 12, wherein the waste heat source is selected from the group consisting of hot condenser cooling water, hot stack gas, hot flue gas, spent process steam, and discarded heat from operating equipment.

14. The particulate material segregating apparatus of claim 10, wherein the temperature delivered to the fluidizing bed by the fluidizing stream does not exceed 300°

F.

15. The particulate material segregating apparatus of claim 10, wherein the temperature delivered to the fluidizing bed by the fluidizing stream is between 200-300°

F.

16. The particulate material segregating apparatus of claim 2, wherein the apparatus is used with respect to an electric power generating plant.

17. The particulate material segregating apparatus of claim 2, wherein the apparatus is used with respect to a coking plant.

18. The particulate material segregating apparatus of claim 1 further comprising a collection chamber operatively connected to the discharge outlet for the non-fluidized particulate material stream for receiving the non-fluidized particulate material stream, the collection chamber including a second fluidizing bed and means for directing a second fluidizing stream through the non-fluidized particulate material contained within the collection chamber for separating fluidizable particles therefrom to further concentrate the contaminant within the non-fluidized particulate material stream.

19. The particulate material segregating apparatus of claim 18, wherein the fluidizable particles separated from the non-fluidized particulate material stream in the collection chamber are returned to the first fluidizing bed by the second fluidizing stream.

20. An apparatus for segregating particulate by density and/or size including:

(a) a fluidizing bed having a particulate receiving inlet for receiving particulate to be fluidized, an opening for receiving a first fluidizing stream, an exit for fluidized particulate and an exit for non-fluidized particulate;

(b) a conveyor for conveying the non-fluidized particulate in the fluidizing bed to the non-fluidized particulate exit;

(c) a collector box positioned to receive the non-fluidized particulate exiting the fluidizing bed, said collector bed including means for directing a second fluidizing stream through the non-fluidized particulate as it is extracted from the collector box to separate fluidizable particulate therefrom; and

(d) a source of fluidizing streams operatively connected to the fluidizing bed and collector.

21. The apparatus for segregating particulate of claim 20 wherein the fluidizable particulate separated from the non-fluidized material as it exits the collector box is directed back into the fluidizing bed by the fluidizing stream.

22. The apparatus for segregating particulate of claim 20 wherein the particulate is coal.

23. The apparatus for segregating particulate of claim 20 including one or more chutes aligned with the collector box for directionally controlling the flow of the non-fluidized coal exiting from the collector box.

24. The apparatus for segregating particulate of claim 20 including a chute aligned with the collector box for directionally controlling the flow of the non-fluidized coal exiting from the collector box, said chute including a first opening for directing the flow of the fluidizing stream exiting the collector box and a second opening for directing the flow of non-fluidized particulate exiting the collector box.

25. The apparatus for segregating particulate of claim 20 wherein the fluidizing stream is air.

26. The apparatus for segregating particulate of claim 20 wherein the means for directing a second fluid stream through the non-fluidized particulate is a collector distributor plate with angled apertures through which the fluidizing stream is directed into the non-fluidized particulate.

27. The apparatus for segregating particulate of claim 20 wherein the means for directing a second fluid stream through the non-fluidized particulate is a collector distributor plate with angled apertures through which the fluidizing stream is directed into the non-fluidized particulate, which collector distributor plate is inclined to assist in controlling flow of the fluidized and non-fluidized particulate.

28. An apparatus for segregating particulate of claim 20 further including a retractable gate preventing the non-fluidized particulate from exiting the fluidizing bed and collector box until opened.

29. The apparatus for segregating particulate of claim 20 wherein the means for directing a second fluid stream through the non-fluidized particulate is an inclined collector distributor plate with angled apertures through which the fluidizing stream is directed into the non-fluidized particulate, and wherein the flow of non-fluidized particulate from the fluidizing bed and through the collector box is controlled by one or more of the pressure of the fluidizing stream in the fluidizing bed, the collector box fluidizing streams and the incline of the collector distributor plate.

30. The apparatus for segregating particulate of claim 20 further comprising a bed distributor plate located near the bottom of the fluidizing bed for supporting particulate placed in the fluidizing bed, said distributor plate further arranged with valves creating a pattern of selectively oriented fluidizing streams within the bed for fluidizing particulate.

31. The apparatus for segregating particulate of claim 20 further comprising a bed distributor plate located near the bottom of the fluidizing bed for supporting particulate placed in the fluidizing bed, said distributor plate being arranged with a plurality of spaced, angled apertures creating multiple fluidizing streams within the bed for directing fluidizing streams through the particulate contained within the fluidizing bed.

32. The apparatus for segregating particulate of claim 20 further comprising a bed distributor plate located near the bottom of the fluidizing bed for supporting particulate placed in the fluidizing bed, said distributor plate formed to create inclined surfaces to encourage gravitational flow of the non-fluidized particulate towards the conveyor.

33. The apparatus for segregating particulate of claim 20 further comprising a bed distributor plate located near the bottom of the fluidizing bed for supporting particulate placed in the fluidizing bed, said bed distributor plate defining a plenum below the inclined bed distributor plate where the fluidizing stream enters before being distributed throughout the fluidizing bed.

34. The apparatus for segregating particulate of claim 20 wherein the fluidizing stream is heated to a temperature in excess of the temperature of the particulate before being introduced into the fluidizing bed.

35. The apparatus for segregating particulate of claim 20 wherein the fluidizing streams are heated to a temperature in excess of the temperature that the particulate has before the particulate is introduced into the fluidizing bed and wherein the apparatus is used in a plant system that generates excess heat as a by-product and the excess heat is the source of heat for warming the fluidizing stream.

36. The apparatus for segregating particulate of claim 20 wherein the fluidizing bed includes a first stage and a second stage separated by a weir, the weir is positioned so that only fluidized particulate is directed by the fluidizing stream into the second stage, and the conveyor and non-fluidized particulate exit are both located within the first stage.

38. The apparatus for segregating particulate of claim 20 wherein the exit for non-fluidized particulate includes a first opening through which the fluidizing stream from the collector box directs fluidized particulate back into the fluidizing bed and a second opening for removal of non-fluidized material from the fluidizing bed.

39. The apparatus for segregating particulate of claim 20 wherein the conveyor is an auger.

37. A method of segregating particulate by weight or size including:

(a) providing a fluidizing bed having a particulate receiving inlet for receiving particulate to be fluidized, an opening for receiving a first fluidizing stream, an exit for fluidized particulate and an exit for non-fluidized particulate;

(b) providing a conveyor for conveying the non-fluidized particulate in the fluidizing bed to the non-fluidized particulate exit;

(c) providing a collector box positioned to receive the non-fluidized particulate exiting the fluidizing bed, said collector box including means for directing a second fluidizing stream through the non-fluidized particulate as it is exits through the collector box to separate fluidizable particulate there from;

(d) providing a source of fluidizing streams operatively connected to the fluidizing bed and collector box; and

(e) delivering particulate through the particulate receiving inlet of the fluidizing bed for processing.

40. An apparatus for segregating particulate material by density and/or size to concentrate a contaminant for separation from the particulate material feed stream, comprising:

(a) a fluidizing bed having a receiving inlet for receiving the particulate material feed, an inlet opening for receiving a fluidizing stream, a discharge outlet for discharging a fluidized particulate material product stream, and a discharge outlet for discharging a non-fluidized particulate material stream;

(b) a source of fluidizing stream operatively connected to the inlet opening for introducing the fluidizing stream into the fluidizing bed to achieve separation of the fluidized particulate material product stream from the non-fluidized particulate material stream;

(c) a conveyor means for transporting the non-fluidized particulate material inside the fluidized bed through the discharge outlet to a reception means; and

(d) wherein the fluidized particulate material product stream contains a reduction in the contaminant relative to the particulate material feed stream, and the non-fluidized particulate material stream contains an increase in the contaminant relative to the particulate material feed stream.

41. The apparatus for segregating particulate of claim 40 further, wherein the fluidizing bed includes a first stage and a second stage separated by a weir, the weir is positioned so that only fluidized particulate is directed by the fluidizing stream into the second stage, and the conveyor means and non-fluidized particulate discharge outlet are both located within the first stage.

42. The apparatus for segregating particulate of claim 40 further comprising a bed distributor plate located near the bottom of the fluidizing bed for supporting particulate placed in the fluidizing bed, said distributor plate being arranged with a plurality of spaced, angled apertures creating multiple fluidizing streams within the bed for directing fluidizing streams through the particulate contained within the fluidizing bed.