US20120122048A1 - Method and an apparatus for continuously sterilizing water for spraying the pistons in a piston pump or a homogenizer - Google Patents

Method and an apparatus for continuously sterilizing water for spraying the pistons in a piston pump or a homogenizer Download PDF

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Publication number
US20120122048A1
US20120122048A1 US13/381,781 US201013381781A US2012122048A1 US 20120122048 A1 US20120122048 A1 US 20120122048A1 US 201013381781 A US201013381781 A US 201013381781A US 2012122048 A1 US2012122048 A1 US 2012122048A1
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US
United States
Prior art keywords
water
heat exchanger
temperature
homogenizer
pistons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/381,781
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English (en)
Inventor
Fredrik Johansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Assigned to TETRA LAVAL HOLDINGS & FINANCE S.A. reassignment TETRA LAVAL HOLDINGS & FINANCE S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOHANSSON, FREDRIK
Publication of US20120122048A1 publication Critical patent/US20120122048A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J11/00—Apparatus for treating milk
    • A01J11/16—Homogenising milk
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

Definitions

  • the present invention relates to a method and an apparatus for continuously sterilizing water for spraying the pistons in a piston pump or a homogenizer,
  • Piston pumps are used int, al. for homogenizers, where they generate the enormous pressure which is required for the homogenization process.
  • Homogenization entails that the product, such as for example milk, which is to be homogenized is forced at high pressure through a narrow gap and the fat globules which exist in the product are atomised after the passage through the gap.
  • Those homogenizers which are used for foods such as dairy produce are provided with double piston seals. This is to ensure that product and surrounding air do not come into contact with one another. In order to cool and lubricate these seals, they are sprayed constantly with water or some other liquid, which implies a not inconsiderable consumption of the spraying liquid.
  • the liquid such as water
  • the liquid must moreover be sterile and not below a certain temperature in order to avoid re-infection of the product.
  • Another method is to cool steam with cooling water to a temperature of 40-60° C. This method implies further consumption of water.
  • the advantage inherent in a lower temperature of the condensate is that it is possible to use other materials for the piston seals. These materials mean that a longer service life will be obtained for the piston seals,
  • EP 1 875 818 A third method of sterilizing water for piston pumps and homogenizers is described in European Patent Specification EP 1 875 818. According to this method, the water is filtered so that it becomes sterile. This method implies a reduced consumption of steam and cooling water, but it does involve major investment costs.
  • One object of the present invention is to realise a method and an apparatus for sterilizing water for spraying the pistons, which reduces both steam consumption and the consumption of cooling water,
  • a further object of the present invention is to realise a method and an apparatus which does not involve major investment costs.
  • the apparatus comprises two heat exchangers, the first being disposed for regeneratively heating the incoming water in a first stage, and cooling the sterile water to a temperature exceeding 75° C., and that the second heat exchanger is disposed, in a second stage, to heat the water to a temperature of at least 121° C., the apparatus also including conduits, a holder cell and requisite valves as well as pressure and temperature gauges.
  • FIG. 1 describes a flow diagram for the apparatus according to the present invention and carrying the method into effect.
  • FIG. 1 shows a flow diagram for the method and the apparatus according to the present invention.
  • Cold water which is to be sterilized enters into the apparatus through the conduit 1 .
  • the water arrives at a first heat exchanger 3 .
  • the heat exchanger 3 is preferably a plate heat exchanger, but other types of heat exchangers may also occur.
  • the heat exchanger 3 a part of the cold water is heated regeneratively by water which has already been heated up.
  • the second part of the cold water is led past the first heat exchanger 3 via the conduit 11 .
  • the cold water flow is divided up in order not to obtain excessively large regenerative cooling effect on the ready-heated water which passes the first heat exchanger 3 on its way to spraying the pistons.
  • the water heated up in the first stage departs from the heat exchanger 3 through the conduit 4 and is converged with the cold water flow from the conduit 11 .
  • the water is led further to a second heat exchanger 5 .
  • the heat exchanger 5 is preferably a plate heat exchanger, but other types of heat exchangers may also occur.
  • the water is heated in a second stage with steam.
  • Other heating forms are also possible.
  • the steam enters the heat exchanger 5 through the conduit 6 .
  • the water is heated to at least 121° C. That the water has achieved the correct temperature is monitored by means of the temperature gauge 7 . Since the water into the second heat exchanger 5 is already heated in a first stage in the first heat exchanger 3 , the steam consumption in the second heat exchanger 5 is reduced.
  • the holding cell 8 may be designed as a helical conduit, or alternatively consist of a straight conduit section.
  • the heated water at a temperature of at least 121° C., is allowed to stay for a predetermined period of time. The higher the temperature the water has at a specific flow, the shorter will be the time the water needs to stay in the holding cell 8 .
  • That the water departing from the holding cell 8 maintains a temperature of at least 121° C. is monitored by the temperature gauge 9 .
  • the heated, now sterile water is thereafter led into the first heat exchanger 3 , where it is caused to regeneratively heat that part of the cold water entering into the apparatus which passes the first heat exchanger 3 . If all of the cold water were to pass the first heat exchanger 3 , there would, granted, be a greater energy saving, but there is simultaneously the risk of obtaining an excessively great regenerative cooling effect on the sterile water.
  • the heated water departs from the first heat exchanger 3 , it is at a temperature of at least 75° C. It is this sterile water which is conveyed in the conduit 10 to the piston pump or the homogenizer, and thereby constitutes the water for the continuous spraying of the pistons.
  • the conduit 10 is in the direct vicinity of the piston pump or the homogenizer, so that the sterile water can spray the pistons at a temperature of at least 75° C. without risk of loosing the temperature.
  • the water for the spraying of the pistons is at a temperature of at least 75° C., it exceeds the pasteurization temperature and the risk of re-infection is reduced. At the same time, there will be obtained a temperature which is lower than the temperature obtained in the previously described prior art method which involves the condensation of steam. As a result of the lower temperature, it is possible to use piston seal material with several times longer service life, at the same time as consumption of steam and water will be substantially reduced. Compared with the method of condensating steam, the water consumption involved in the method according to the present invention will be approx. 75% lower and the steam consumption will be approx. 50% lower.
  • the apparatus and the method of sterilizing water for spraying the pistons in a piston pump or a homogenizer also makes possible sterilization of the piston space between the piston seals in connection with the remaining sterilization of the equipment on production start-up.
  • the cold water entering into the conduit 1 is then caused to pass the conduit 11 since the shut-off valve 2 is kept closed.
  • the cold water is thereafter led further in the conduit 4 to the second heat exchanger 5 .
  • the water is heated to at least 121° C. and is allowed to remain in the holding cell at this temperature for a predetermined period of time.
  • the hot water is then caused to pass the first heat exchanger 3 without any cooling medium being in the heat exchanger 3 .
  • the water is still at a temperature of at least 121° C. when it is led in the conduit 10 to the piston pump or the homogenizer and an efficient sterilization of the space between the piston seals will thereby be obtained.
  • the apparatus and the method according to the present invention may also be used during a main wash, i.e. when the plant of which the homogenizer constitutes a part is cleaned.
  • a valve 12 on the conduit 6 for the supply of steam is closed and no steam then arrives at the second heat exchanger 5 , Cold water from the conduit 1 passes through the entire apparatus. Thereby, a further reduction of the steam consumption will be obtained and the thermal loading on the piston seals is reduced.
  • the present invention realises a method and an apparatus for continuously sterilizing the water which is used for spraying the pistons in a piston pump or a homogenizer.
  • a substantially reduced consumption of steam and water compared with prior art methods.
  • the apparatus for carrying the method into effect imply any major investment costs.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
US13/381,781 2009-07-02 2010-06-23 Method and an apparatus for continuously sterilizing water for spraying the pistons in a piston pump or a homogenizer Abandoned US20120122048A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0900901-0 2009-07-02
SE0900901A SE534079C2 (sv) 2009-07-02 2009-07-02 Metod och anordning för att sterilisera vatten för spolning av kolvarna i en kolvpump eller en homogenisator
PCT/SE2010/000173 WO2011002376A1 (en) 2009-07-02 2010-06-23 A method and an apparatus for continuously steralizing water for spraying the pistons in a piston pump or a homogenizer

Publications (1)

Publication Number Publication Date
US20120122048A1 true US20120122048A1 (en) 2012-05-17

Family

ID=43411267

Family Applications (1)

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US13/381,781 Abandoned US20120122048A1 (en) 2009-07-02 2010-06-23 Method and an apparatus for continuously sterilizing water for spraying the pistons in a piston pump or a homogenizer

Country Status (12)

Country Link
US (1) US20120122048A1 (ru)
EP (1) EP2448873B1 (ru)
JP (2) JP2012532014A (ru)
CN (2) CN105384290A (ru)
AU (1) AU2010266775B2 (ru)
BR (1) BRPI1011674A2 (ru)
CA (1) CA2767087A1 (ru)
EA (1) EA022088B1 (ru)
MX (1) MX2012000153A (ru)
NZ (1) NZ597277A (ru)
SE (1) SE534079C2 (ru)
WO (1) WO2011002376A1 (ru)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20120013A1 (it) * 2012-03-19 2013-09-20 Gea mechanical equipment italia spa Apparato per trattamento termico acqua a rigenerazione per flussaggio camere asettiche di omogeneizzatori o pompe ad alta pressione
EP2941567B1 (en) * 2012-12-21 2017-03-01 Tetra Laval Holdings & Finance S.A. Piston and use of such piston
CN104193069B (zh) * 2014-09-22 2016-04-13 山东新华医疗器械股份有限公司 一种动物饮用水处理设备
EP3183955A1 (en) 2015-12-21 2017-06-28 Tetra Laval Holdings & Finance S.A. A heat exchanger arrangement and method for providing process water to a piston pump or a homogenizer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296122A (en) * 1963-04-02 1967-01-03 Worthington Corp Supply of fresh unpolluted water by means of pasteurization and sterilization of sewage effluent

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Publication number Priority date Publication date Assignee Title
CH390226A (de) * 1961-11-27 1965-04-15 Alpura Ag Unter sterilen Bedingungen betreibbare Homogenisierpumpe
JPH04354579A (ja) * 1991-05-29 1992-12-08 Shimadzu Corp 廃液殺菌装置
DK171666B1 (da) * 1994-11-18 1997-03-10 Apv Pasilac As Anlæg til kontinuerlig sterilisering af væsker, såsom mælk og fløde
JP4452389B2 (ja) * 2000-09-21 2010-04-21 サクラ精機株式会社 熱水シャワー式洗浄消毒装置
JP3716207B2 (ja) * 2001-12-12 2005-11-16 三菱重工業株式会社 無菌水製造装置及び製造方法
US20070221362A1 (en) * 2004-04-23 2007-09-27 Stewart Murray Kenneth T Disinfection System
FR2876125B1 (fr) * 2004-10-01 2008-04-18 Alfa Laval Vicarb Soc Par Acti Dispositif de destruction de microorganismes, en particulier de legionelles, dans un reseau d'eau sanitaire ou autre
US20080107561A1 (en) * 2005-08-22 2008-05-08 Bowen John G Apparatus and methods for variably sterilizing aqueous liquids
ITPR20060062A1 (it) * 2006-07-03 2008-01-04 Cft Spa Sistema per creare una barriera sterile e lubrificare e/o refrigerare parti mobili in impianti di sterilizzazione uht.
JP4649667B2 (ja) * 2006-10-27 2011-03-16 株式会社大晃産業 バラスト水の熱回収型浄化処理システム
WO2009146504A1 (en) * 2008-06-06 2009-12-10 Packaged Environmental Solutions (Int.) Pty Ltd Heat treatment and disinfection system for fluids

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296122A (en) * 1963-04-02 1967-01-03 Worthington Corp Supply of fresh unpolluted water by means of pasteurization and sterilization of sewage effluent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Smith, Cecil L. "Look at Liquid Bypass." accessed online at <http://www.chemicalprocessing.com/articles/2009/116/?show=all> on 18 March 2016. 28 May 2009. *

Also Published As

Publication number Publication date
EP2448873A1 (en) 2012-05-09
EA201270112A1 (ru) 2012-05-30
SE534079C2 (sv) 2011-04-26
CA2767087A1 (en) 2011-01-06
EP2448873B1 (en) 2017-01-18
NZ597277A (en) 2014-07-25
JP2012532014A (ja) 2012-12-13
SE0900901A1 (sv) 2011-01-03
EA022088B1 (ru) 2015-10-30
EP2448873A4 (en) 2013-02-06
MX2012000153A (es) 2012-02-13
CN105384290A (zh) 2016-03-09
BRPI1011674A2 (pt) 2016-03-22
JP2016106028A (ja) 2016-06-16
AU2010266775A1 (en) 2012-02-02
CN102471110A (zh) 2012-05-23
AU2010266775B2 (en) 2014-09-04
WO2011002376A1 (en) 2011-01-06

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Date Code Title Description
AS Assignment

Owner name: TETRA LAVAL HOLDINGS & FINANCE S.A., SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOHANSSON, FREDRIK;REEL/FRAME:027609/0001

Effective date: 20120109

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION