Two stage high speed centrifuges in series used to recover oil and protein from a whole stillage in a dry mill process

• US 9,695,381 B2
• Filed: 03/15/2013
• Issued: 07/04/2017
• Est. Priority Date: 11/26/2012
• Status: Active Grant

• Current Assignee: Lee Tech LLC
• Original Assignee: Lee Tech LLC
• Inventors: Lee, Chie Ying
• Primary Examiner(s): Beisner, William H
• Application Number:
  US13/844,506
• Publication Number:
  US 20140147897A1
• Time in Patent Office: 1,572 Days
• CPC Class Codes: A23K 10/38 from distillers' or brewers' waste
• CPC Class Codes: A23K 50/30 for swines
• CPC Class Codes: A23K 50/75 for poultry
• CPC Class Codes: C07K 1/36 by a combination of two or more processes of different types
• CPC Class Codes: C11B 1/10 by extracting
• CPC Class Codes: C11B 1/108 after-treatment, e.g. of miscellae
• CPC Class Codes: C11B 3/003 by enzymes or microorganisms, living or dead
• CPC Class Codes: C11B 3/16 by mechanical means
• CPC Class Codes: Y02P 60/87 Re-use of by-products of food processing for fodder production

Abstract

Methods of and devices for recovering oil and protein and increasing production yields using two centrifuges in series or a centrifuge with dual oil and protein separating functions in a dry mill are provided.

Claims

1. A back-end two centrifuges dry mill system comprising a fermenter, a three-phase disc decanter and an oil polishing centrifuge, wherein the three-phase disc decanter and the oil polishing centrifuge are after the fermenter, wherein the three-phase disc decanter has a disc height/disc diameter ratio greater than 1, and wherein the three-phase disc decanter comprises two different disc stocks, and wherein the three-phase disc decanter comprises a three phase nozzle centrifuge and a decanter.

2. The system of claim 1, further comprising an emulsion breaking container is fluidly coupled with the three-phase disc decanter.

3. The system of claim 2, wherein the oil polishing centrifuge is fluidly coupled with the emulsion breaking container.

4. The system of claim 1, further comprising a fiber separation decanter is coupled with the fermenter and the three-phase disc decanter, wherein the fiber separation decanter located after the fermenter and before the three-phase disc decanter.

5. The system of claim 4, wherein the fiber separation decanter receives a whole stillage and separates the whole stillage into a solid portion and a liquid portion.

6. The system of claim 5, wherein the liquid portion is received by the three-phase disc decanter.

7. The system of claim 1, wherein the three-phase disc decanter generates a cake phase discharge, wherein the three-phase disc decanter is coupled with a protein dryer.

8. The system of claim 7, wherein a back-set stream is sent back to a front-end process before the fermenter.

9. The system of claim 1, wherein the three-phase disc decanter generates a heavy phase comprises de-oiled germs and protein.

10. The system of claim 9, further comprising an evaporator receives the heavy phase from the three-phase disc decanter.

11. The system of claim 10, further comprising an oil recovery container receives an concentrated solution from the evaporator for oil recovery.

12. The system of claim 1, wherein the three-phase disc decanter generates a heavy phase, wherein the heavy phase is used as a back-set stream at a front-end process before the fermenter.

13. The system of claim 1, wherein the three-phase disc decanter generates a heavy phase, wherein the three-phase disc decanter is coupled an evaporator.

14. The system of claim 1, further comprising a germ/fiber separating container located between the fermenter and the three-phase disc decanter.

15. The system of claim 1, further comprising a decanter located between the fermenter and the three-phase disc decanter.

16. The system of claim 1, wherein the two different types of disc stocks comprise a clarified disc stock and a purified disc stock.

17. A back-end two centrifuges dry mill system comprising a fermenter, a three-phase disc decanter and an oil polishing centrifuge, wherein the three-phase disc decanter and the oil polishing centrifuge are after the fermenter, wherein the three-phase disc decanter has a disc height/disc diameter ratio greater than 1, and wherein the three-phase disc decanter comprises two different disc stocks.