System and method for integrated waste storage

• US 10,519,389 B2
• Filed: 06/21/2017
• Issued: 12/31/2019
• Est. Priority Date: 06/26/2008
• Status: Active Grant

• Current Assignee: Repower IP LLC
• Original Assignee: Accordant Energy, LLC
• Inventors: Bohlig, James W., Casella, Douglas R.
• Primary Examiner(s): Davis, Sheng H
• Application Number:
  US15/629,608
• Publication Number:
  US 20180037830A1
• Time in Patent Office: 923 Days
• Field of Search: None
• CPC Class Codes: B29B 17/02 Separating plastics from other materials
• CPC Class Codes: B29K 2023/065 HDPE, i.e. high density polyethylene
• CPC Class Codes: B29K 2067/00 Use of polyesters or derivatives thereof, as moulding material
• CPC Class Codes: C10J 2300/0946 Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
• CPC Class Codes: C10J 3/72 Other features
• CPC Class Codes: C22B 1/24 Binding; Briquetting ; Granulating
• CPC Class Codes: C22B 7/005 Separation by a physical processing technique only, e.g. by mechanical breaking
• CPC Class Codes: Y02E 20/18 Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
• CPC Class Codes: Y02P 10/20 Recycling
• CPC Class Codes: Y02W 30/50 Reuse, recycling or recovery technologies
• CPC Class Codes: Y02W 30/62 Plastics recycling; Rubber recycling

Abstract

The present invention provides integrated bunker storage systems for waste streams based on the composition and characteristics of waste streams. In particular, the present invention provides a process for generating individual waste streams based on a set of material characteristics. According to the system and method of the present invention, individual waste streams from wastes stored in bunkers are mixed in a given feed ratio to generate a feed stock that will produce a desired output from a chemical conversion process, e.g., gasification. Optionally, composition data regarding the feed stock can be certified to a third party.

Claims

1. A system, comprising:

a separation system configured for separating waste constituents of a solid waste stream, the waste constituents including plastics and fibers, the separation system comprising

a screen configured for separating the waste constituents based on size to remove oversized materials from the solid waste stream,

a magnetic separator configured for removing ferrous metals from the solid waste stream,

an air classifier configured for separating the waste constituents based on density, and

an optical sorter configured for optically sorting the waste constituents based on type;

a bunker storage system for storing the waste constituents separated from the solid waste stream, wherein the bunker storage system comprises at least one of;

a plastic bunker for storing plastics separated from the solid waste stream,

a fiber bunker for storing fibers separated from the solid waste stream,

a glass bunker for storing glass separated from the solid waste stream, and

a ferrous metal storage bunker configured for storing ferrous metals separated from the solid waste stream; and

an engineered fuel production system, the engineered fuel production system configured for combining the waste constituents separated from the solid waste stream based on a predetermined recipe to form an engineered fuel.

2. The system of claim 1, wherein the system further comprises

a presorting station configured for sorting waste material into presorted waste constituents.

3. The system of claim 2, wherein the presorted waste constituents include ferrous, hard plastics, and film plastics.

4. The system of claim 1, wherein the separation system further comprises

a tipping floor configured for receiving the solid waste stream.

5. The system of claim 4, wherein the separation system further comprises

a bag breaker for splitting bags of the waste constituents of the solid waste stream received on the tipping floor.

6. The system of claim 1, wherein the separation system further comprises

an eddy current separator for separating nonferrous metals from the solid waste stream.

7. The system of claim 1, wherein the screen configured for separating the waste constituents based on size separates the waste constituents that are less than 12 inches in size.

8. The system of claim 7, wherein the screen configured for separating the waste constituents based on size separates the waste constituents that are less than 8 inches in size.

9. The system of claim 1, wherein the screen configured for separating the waste constituents is a trommel.

10. The system of claim 1, wherein the screen configured for separating the waste constituents is a disc screen.

11. The system of claim 10, wherein the disc screen is configured for separating fibers from the solid waste stream.

12. The system of claim 1, wherein the fibers includes paper, bags, and corrugated fiber.

13. The system of claim 1, wherein the optical sorter configured for optically sorting the waste constituents based on type is configured for optically sorting plastics by type.

14. The system of claim 1, wherein the optical sorter configured for optically sorting the waste constituents based on type is configured for optically sorting plastics from fibers.

15. The system of claim 1, wherein the optical sorter configured for collecting data pertaining to at least one of a volume and a weight of the waste constituents.

16. The system of claim 1, wherein the engineered fuel production system further comprises

a vessel configured for combining the waste constituents separated from the solid waste stream based on the predetermined recipe.

17. The system of claim 16, wherein the vessel is further configured for mixing and drying the waste constituents.

18. The system of claim 16, wherein the vessel is an auger.

19. The system of claim 1, wherein the engineered fuel production system further comprises

a shredder configured for shredding the engineered fuel to a predetermined size.

20. The system of claim 1, wherein the engineered fuel production system further comprises

a densifier configured for densifying the engineered fuel into a densified form.

21. The system of claim 20, wherein the densifier is a pelletizer configured for producing pellets.

22. The system of claim 1, wherein the engineered fuel production system further includes

a device configured for determining a composition of the waste constituents.

23. The system of claim 22, wherein the device configured for determining the composition of the waste constituents includes at least one of a thermo gravimetric analysis device, a prompt gamma neutron activation analysis device, a dual-energy gamma attenuation device, and combinations thereof.

24. The system of claim 22, wherein the device configured for determining the composition of the waste constituents is configured for determining the composition from a lookup table.

25. The system of claim 1, wherein the engineered fuel production system further comprises

an optical composition recorder for collecting data pertaining to at least one of a type, volume, and quality of the waste constituents separated from the solid waste stream.

26. The system of claim 1, wherein the engineered fuel production system further comprises

a data controller for accumulating data collected by the optical composition recorder pertaining to at least one of a type, volume, and quality of the of waste constituents separated from the solid waste stream.

27. The system of claim 26, wherein the data is certified for use by a third party.

28. The system of claim 1, wherein the engineered fuel production system further comprises

a control unit configured for determining a quantity and a type of the waste constituents from the solid waste stream to be combined based on the predetermined recipe is configured to specify a quantity and a type of the waste constituents to be combined.

29. The system of claim 28, wherein the quantity and the type of the waste constituents to be combined are based on the chemical and the physical characteristics of the waste.

30. The system of claim 28, wherein the engineered fuel production system further comprises

a moisture sensor configured for measuring a moisture content of the waste constituents separated from the solid waste stream.

31. The system of claim 30, wherein the moisture sensor is an infrared detector or a microwave detector.

32. The system of claim 30, wherein the control unit is configured for receiving information regarding the moisture content from the moisture sensor for each type of the waste constituents and is configured for adjusting the quantity of each type of the waste constituents to be combined based on information associated with the moisture content.

33. The system of claim 28, wherein the control unit is configured for adjusting the quantity of each type of the waste constituents to be combined based on information associated with a heating value of the waste constituents.

34. The system of claim 28, wherein the control unit is configured for adjusting the quantity of each type of the waste constituents to be combined based on information associated with an elemental content of the waste constituents.

35. The system of claim 34, wherein the elemental content of the waste constituents is at least one of carbon, hydrogen, oxygen, sulfur, nitrogen, chlorine, and/or a ratio thereof.

36. The system of claim 28, wherein the control unit is configured for adjusting the quantity of each type of the waste constituents to be combined based on information associated with a chemical composition of the waste constituents.

37. The system of claim 36, wherein the chemical composition is an ash content of the waste constituents.

38. The system of claim 1, wherein the solid waste stream is a mixed municipal solid waste.

39. The system of claim 1, wherein the solid waste stream is a source segregated stream.

40. The system of claim 39, wherein the source segregated stream comprises recyclable materials.

41. The system of claim 39, wherein the source segregated stream comprises recycling residue.

42. A system, comprising:

a separation system configured for separating waste constituents of a solid waste stream into the waste constituents including plastics, fibers, ferrous metals, and to remove glass and oversized materials from the solid waste stream, the separation system including

a magnetic separator configured for removing ferrous metals from the solid waste stream,

an air classifier configured for separating the waste constituents based on density from the solid waste stream,

a screen configured for separating the waste constituents based on size from the solid waste stream, and

an optical sorter configured for sorting the waste constituents based on type from the solid waste stream;

a bunker storage system for storing the waste constituents separated from the solid waste stream, wherein the bunker storage system comprises at least one of;

a plastic bunker for storing plastics separated from the solid waste stream,

a fiber bunker for storing fibers separated from the solid waste stream,

a glass bunker for storing glass separated from the solid waste stream, and

a ferrous metal storage bunker configured for storing ferrous metals separated from the solid waste stream;

an engineered fuel production system, the engineered fuel production system configured for combining the waste constituents separated from the solid waste stream based on a predetermined recipe including

a control unit, wherein the control unit is configured for determining a quantity and a type of the waste constituents from the solid waste stream to be combined based on the predetermined recipe is configured to specify a quantity and a type of the waste constituents to be combined,

a vessel configured for combining the waste constituents based on the predetermined recipe, and at least one of

a shredder configured for shredding engineered fuel to a predetermined size and a densifier configured for densifying the engineered fuel to a densified form.

43. The system of claim 42, wherein the system further comprises

a presorting station configured for sorting waste material into presorted waste constituents.

44. The system of claim 42, wherein the separation system further comprises

a tipping floor configured for receiving the solid waste stream.

45. The system of claim 42, wherein the separation system further comprises

a bag breaker for splitting bags of the waste constituents of the solid waste stream received on the tipping floor.

46. The system of claim 42, wherein the separation system further comprises

an eddy current separator for separating nonferrous metals from the solid waste stream.

47. The system of claim 42, wherein the screen configured for separating the waste constituents is a trommel.

48. The system of claim 42, wherein the screen configured for separating the waste constituents is a disc screen.

49. The system of claim 42, wherein the vessel is an auger.

50. The system of claim 42, wherein the engineered fuel production system further comprises

a shredder configured for shredding the engineered fuel to a predetermined size.

51. The system of claim 42, wherein the engineered fuel production system further comprises

a densifier configured for densifying the engineered fuel into a densified form.

52. The system of claim 51, wherein the densifier is a pelletizer configured for producing pellets.

53. The system of claim 52, wherein the engineered fuel production system further includes

a device configured for determining a composition of the waste constituents, wherein the device configured for determining the composition of the waste constituents includes at least one of a thermo gravimetric analysis device, a prompt gamma neutron activation analysis device, a dual-energy gamma attenuation device, and combinations thereof.

54. The system of claim 42, wherein the engineered fuel production system further comprises

an optical composition recorder for collecting data pertaining to at least one of a type, volume, and quality of the waste constituents separated from the solid waste stream.

55. The system of claim 42, wherein the engineered fuel production system further comprises

a data controller for accumulating data collected by the optical composition recorder pertaining to at least one of a type, volume, and quality of the of waste constituents separated from the solid waste stream.

56. The system of claim 42, wherein the engineered fuel production system further comprises

a moisture sensor configured for measuring a moisture content of the waste constituents separated from the solid waste stream.

57. The system of claim 56, wherein the moisture sensor is an infrared detector or a microwave detector.