IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0086684
(2006-12-20)
|
등록번호 |
US-8211305
(2012-07-03)
|
우선권정보 |
DE-10 2005 061 302 (2005-12-21) |
국제출원번호 |
PCT/EP2006/012355
(2006-12-20)
|
§371/§102 date |
20090925
(20090925)
|
국제공개번호 |
WO2007/076943
(2007-07-12)
|
발명자
/ 주소 |
- Menke, Lucas
- Troubounis, George
|
출원인 / 주소 |
- Meri Entsorgungstechnik fuer die Papierindustrie GmbH
|
대리인 / 주소 |
Kilpatrick Townsend & Stockton LLP
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
6 |
초록
▼
Disclosed is a system for renovating process water, especially during the production of paper. Said system comprises at least one process water renovation unit, at least one of which is provided with an anaerobic reactor spiked with anaerobic microorganisms as well as a lime elimination unit. Also d
Disclosed is a system for renovating process water, especially during the production of paper. Said system comprises at least one process water renovation unit, at least one of which is provided with an anaerobic reactor spiked with anaerobic microorganisms as well as a lime elimination unit. Also disclosed is a method for renovating process water, particularly during the production of paper, which encompasses at least one process water renovation step in which at least some of the process water continuously delivered to the process water renovation step is subjected to a purification step in an anaerobic reactor that is spiked with anaerobic microorganisms and to a deliming step.
대표청구항
▼
1. A method of treating process water guided in a circuit, comprising: purifying at least some of the process water in an anaerobic reactor, wherein the purifying comprises mixing the at least some of the water with anaerobic microorganisms; anddeliming the at least some of the process water, wherei
1. A method of treating process water guided in a circuit, comprising: purifying at least some of the process water in an anaerobic reactor, wherein the purifying comprises mixing the at least some of the water with anaerobic microorganisms; anddeliming the at least some of the process water, wherein the deliming comprises pressure relief flotation. 2. The method of claim 1, wherein the process water comes from a material preparation apparatus and/or from a paper making machine. 3. The method of claim 2, wherein the process water comes from at least one stage of a recovered paper treatment apparatus and/or from a paper making machine. 4. The method of claim 1, wherein a pressure difference between pressurizing and expansion in the pressure relief flotation amounts to at least 2 bar. 5. The method of claim 1, wherein the method is carried out in a system comprising at least one process water treatment unit comprising an anaerobic reactor comprising anaerobic microorganisms; the process water treatment unit further comprising a lime elimination unit. 6. The method of claim 5, wherein the system further comprises at least one material preparation apparatus and/or at least one paper making machine, wherein the process water treatment unit is associated with the at least one material preparation apparatus and/or the at least one paper making machine. 7. The method of claim 5, wherein the system further comprises: a recovered paper treatment apparatus for manufacture of pulp from recovered paper, the recovered paper treatment apparatus comprising one or more stages; and/ora paper making machine for manufacture of paper from the pulp;wherein at least one of the stages and/or the paper making machine comprises the process water treatment unit. 8. The method of claim 5, wherein the process water treatment unit further comprises a material recovery unit and/or a material removal unit. 9. The method of claim 5, wherein the process water treatment unit further comprises a filtration unit disposed downstream of both the lime elimination unit and of the anaerobic reactor. 10. The method of claim 5, wherein the lime elimination unit is disposed upstream of the anaerobic reactor. 11. The method of claim 5, wherein the lime elimination unit is disposed downstream of the anaerobic reactor. 12. The method of claim 5, wherein the lime elimination unit comprises a pressure relief flotation apparatus. 13. The method of claim 12, wherein the pressure relief flotation apparatus is configured such that a pressure difference between pressurization and expansion amounts to at least 2 bar. 14. The method of claim 12, wherein the pressure relief flotation apparatus comprises a precipitation device and the deliming comprises precipitating lime from the process water by adding a substance selected from the group consisting of pH setting agents, precipitants, flocculation aids and any desired combination thereof; wherein the pressure relief flotation device further comprises a lime separation device, the method further comprising separating the precipitated lime from the process water. 15. The method of claim 14, wherein the system further comprises a mixing unit, and wherein the method further comprises homogeneous mixing of a substance selected from the group consisting of pH setting agents, precipitants, flocculation aids and any desired combination thereof into the process water. 16. The method of claim 14, wherein the precipitation device and the lime separation device are both arranged downstream of, or are both arranged upstream of, the anaerobic reactor. 17. The method of claim 14, wherein the precipitation unit is disposed downstream of the anaerobic reactor and the lime separation device is disposed upstream of the anaerobic reactor, the system further comprising a part flow line leading from the anaerobic reactor into the precipitation device, wherein the water leaving the precipitation device is guided via a line into the lime separation device, the system further compristing a bypass line leading from the anaerobic reactor past the precipitation device into the filtration unit. 18. The method of claim 17, wherein the lime separation device comprises a material recovery unit and/or a material removal unit. 19. The method of claim 12, wherein the pressure relief flotation apparatus is configured such that a pressure difference between pressurization and expansion amounts to at least 3 bar. 20. The method of claim 12, wherein the pressure relief flotation apparatus is configured such that a pressure difference between pressurization and expansion amounts to at least 4 bar. 21. The method of claim 12, wherein the pressure relief flotation apparatus is configured such that a pressure difference between pressurization and expansion amounts to at least 5 bar. 22. The method of claim 5, wherein the system comprises at least two stages which are decoupled from one another by a deckering stage. 23. The method of claim 22, wherein at least one of the stages comprises the process water treatment unit. 24. The method of claim 22, wherein each of the stages comprises one of the at least one process water treatment unit. 25. The method of claim 5, wherein the system further comprises a waste water purification apparatus, the method further comprising purifying some of the process water in the waste water purification apparatus and draining the some of the water out of the system. 26. The method of claim 25, wherein the system further comprises a part flow line which leads back from the waste water purification apparatus into the system and/or into the paper making machine. 27. The method of claim 25, wherein the waste water apparatus comprises one or more devices which are selected from the group consisting of material removal units, cooling units, biological waste water treatment units, and any desired combinations thereof. 28. The method of claim 1, wherein a pressure difference between pressurizing and expansion in the pressure relief flotation amounts to at least 3 bar. 29. The method of claim 1, wherein a pressure difference between pressurizing and expansion in the pressure relief flotation amounts to at least 4 bar. 30. The method of claim 1, wherein a pressure difference between pressurizing and expansion in the pressure relief flotation amounts to at least 5 bar.
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