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WO2017051322A1 - Dispositif de stérilisation de liquides - Google Patents

Dispositif de stérilisation de liquides Download PDF

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Publication number
WO2017051322A1
WO2017051322A1 PCT/IB2016/055623 IB2016055623W WO2017051322A1 WO 2017051322 A1 WO2017051322 A1 WO 2017051322A1 IB 2016055623 W IB2016055623 W IB 2016055623W WO 2017051322 A1 WO2017051322 A1 WO 2017051322A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
protruding members
tube
housing
inlet
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.)
Ceased
Application number
PCT/IB2016/055623
Other languages
English (en)
Inventor
Stuart Donovan RIX
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2017051322A1 publication Critical patent/WO2017051322A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B11/00—Preservation of milk or dairy products
    • A23B11/10—Preservation of milk or milk preparations
    • A23B11/16—Preservation of milk or milk preparations by irradiation, e.g. by microwaves
    • A23B11/164—Preservation of milk or milk preparations by irradiation, e.g. by microwaves by ultraviolet or infrared radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/10—Ultraviolet radiation
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12H—PASTEURISATION, STERILISATION, PRESERVATION, PURIFICATION, CLARIFICATION OR AGEING OF ALCOHOLIC BEVERAGES; METHODS FOR ALTERING THE ALCOHOL CONTENT OF FERMENTED SOLUTIONS OR ALCOHOLIC BEVERAGES
    • C12H1/00—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages
    • C12H1/12—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages without precipitation
    • C12H1/16—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages without precipitation by physical means, e.g. irradiation
    • C12H1/165—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages without precipitation by physical means, e.g. irradiation by irradiation
    • A61L2103/05—
    • A61L2103/09—
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps

Definitions

  • This invention relates to a device for use in the sterilization of liquids, in particular turbid liquids, the device comprising a UV source and an elongate tube with an arrangement of protruding members on the inner wall thereof, which in use, disrupts the flow of the liquid flowing through the tube, thereby increasing the exposure to the UV source.
  • UV light for the purpose of sterilizing a liquid
  • a problem that arises with a turbid liquid is that the light does not penetrate sufficiently far into the liquid, hence liquid furthest from the UV lamp may not be sterilized at all, or may not be sterilized to a desired level.
  • South African patent no. 96/8029 discloses an elongate sterilizer in which a fluorescent tube is within, and co-axial with, an elongate housing. The sterilization chamber is between the fluorescent tube and the housing.
  • the liquid inlet and liquid outlet are arranged tangentially with respect to the housing in an effort to cause the liquid to swirl and overcome the difficulty referred to above. It has been found, however, that the swirling motion imparted to the liquid as it enters the housing does not continue throughout the length of the housing, thus limiting the beneficial effect.
  • WO2001/37675 discloses a sterilizer that attempts to address the shortcomings experienced by devices and arrangements disclosed in South African patent no. 96/8029 and U.S. Pat. No. 5,675,153.
  • This sterilizer also comprises a liquid inlet and liquid outlet that are arranged tangentially to the outer housing and the internal tube such as disclosed in 96/8029, but introduces circular or helical protuberances on the inner wall of the tube to attempt to maintain the swirling motion imparted to the liquid at the inlet throughout the length of the tube.
  • this arrangement relies on the internal configuration of the tube exclusively to maintain turbulence created at the inlet. As a result of the particular arrangement, it will also be appreciated that this device is rather sensitive to variations in flow rate.
  • a liquid sterilization device suitable for the use in reducing the bacterial count in a liquid
  • the device comprising: an elongate housing having an inlet and outlet at opposing ends thereof, the housing being adapted to receive a UV source in use, and an elongate tube extending along the length of the elongate housing, wherein the elongate tube comprises complementary sets of opposing protruding members, there being a space between the UV source and the inner wall of the tube and the protruding members extending therefrom for the liquid to pass through, such that in use a disruptive mixing motion is imparted to the liquid by the protruding members as the liquid passes through the tube from the inlet to the outlet.
  • the housing further comprises a UV light transparent sleeve which is adapted to receive the UV source in use.
  • the inlet and outlet to the housing are located substantially along a vertical central plane passing through the housing.
  • the complementary sets of opposing protruding members are arranged in longitudinal rows along the length of the elongate tube.
  • the tube comprises four or more longitudinal rows of opposing protruding members.
  • the tube comprises four or six longitudinal rows of opposing protruding members.
  • consecutive sets of opposing protruding members are circumferentially staggered in respect of another.
  • the protruding members may be provided in the form of dimples, indentations, or knobs extending from the inner wall of the tube.
  • a method for sterilizing a turbid liquid comprising the steps of: providing a liquid sterilization device according to the invention, passing a liquid to be sterilized through the device to expose the liquid to UV light from the UV source, and collecting the sterilized liquid.
  • the turbid liquid is selected from the group consisting of alcohol containing liquids including wine and beer, biological fluids including blood, liquids for human consumption including milk, petrochemicals including all oils, and contaminated aqueous solutions including waste water.
  • the turbid liquid is milk, blood, or waste water.
  • Figure 1 shows a side view of the device according to the present invention
  • Figure 2 shows a longitudinal section of one end of the device according to the present invention
  • Figure 3 shows a cross section on line Ill-Ill of Figure 1 ;
  • Figure 4 shows a plain view of part of an elongate tube according to one embodiment of the present invention
  • Figure 5 shows a cross section on the line V-V of Figure 4.
  • Figure 6 shows a plain view of part of an elongate tube according to another embodiment of the present invention.
  • Figure 7 shows a cross section on the line VI-VI of Figure 6.
  • the present invention provides for a device for use in the sterilization of liquids, in particular turbid liquids, the device comprising a UV emitting source and an elongate tube with an arrangement of protruding members on the inner wall thereof, which in use, disrupts the flow of the liquid flowing through the tube, thereby increasing the exposure to the ultra-violet (UV) source.
  • the UV emitting source may be a UV light fluorescent tube.
  • the device 10 illustrated is designed specifically for the purpose of sterilizing turbid liquids.
  • the turbid liquids may be selected from the group consisting of alcohol containing liquids such as wine and beer, biological fluids such as blood, and liquids for human consumption such as milk and petrochemicals including all oils.
  • the device 10 comprises an elongate stainless steel outer housing 12 which is circular in cross section.
  • a mounting plate 14 is tack welded to the housing 12 midway between its ends.
  • a problem that arises with the sterilization of a turbid liquid is that the UV light, emitted from a central source, does not penetrate sufficiently far into the liquid as a result of the turbidity thereof. As a result some of the turbid liquid passing through a sterilizer, furthest from the UV source, may not be sterilized at all, or may not be sterilized to a desired level. Therefore, it is desirable to provide means that disrupt or agitate the otherwise smooth flow of the liquid passing through the sterilizer.
  • the inlet 16.1 receives a flow of unsterilized liquid from a feed source, the liquid flowing through the device 10 and out through outlet 16.2 at the other end of the housing 12 to a holding tank or to further processing steps.
  • the inlet and outlet are each configured at the ends 20 thereof to secure inlet and outlet lines according to the particular process in which the device is used.
  • the ends may be configured to secure a female dairy fitting, thereby enabling a typical dairy process hose to be secured thereto.
  • the inlet 16.1 and outlet 16.2 may be arranged substantially along a vertical central plane passing through the housing 12, and not towards one side or the other thereof.
  • the inlet and outlet does not have to be arranged tangentially to the outer housing, although it is envisaged that the robust nature of the internal arrangement of the tube 26 is such that any inlet and outlet arrangement would provide comparable sterilization results, including a tangential arrangement.
  • an inlet and outlet configuration may be selected based on other factors, such as manufacturing cost, the particular application envisaged, and ease of operation.
  • the inlet 16.1 and outlet 16.2 have openings which are aligned with corresponding openings 26a and 26b in the tube 26 (see also Figures 4 to 7)
  • the tube 26 extends along the full length of the housing 12 between the inlet 16.1 and outlet 16.2 thereby creating a path for the liquid to flow from the inlet 16.1 , through the opening 26a, along the length of the tube 26, through the opening 26b, and out through the outlet 16.2.
  • the housing 12 has internally threaded sockets 28 at the ends thereof.
  • An externally threaded bush 30 is screwed into each socket 28 and there is a sealing o-ring 32 between each bush 30 and the wall of the housing 12.
  • the tube 26 may be formed with four longitudinal rows of protruding members 36.
  • the protruding members may be dimples or indentations in the tube, or may be protruding knobs extending from the inner wall of the tube 26.
  • the rows of protruding members 36 are equally spaced from one another around the circumference of the tube 26.
  • the tube 26 may be made from stainless steel or any other desirable material according to the particular liquid to be passed through the tube in terms of the selected application.
  • the protruding members 36 in diametrically opposed rows are diametrically opposed to one another and therefore act in a complementary manner to disrupt the flow of liquid through the tube 26.
  • pairs of complementary protruding members are at opposite ends of common diameters.
  • One such diameter is shown at D in Figure 4.
  • the pitch length between protruding members in a row is designated P in Figure 4.
  • the protruding members 36 in adjacent rows are displaced axially with respect to one another by half a pitch length as indicated by the double headed arrow A in Figure 4.
  • the protruding members in each row are staggered axially with respect to the protruding members in adjacent rows by half a pitch length.
  • protruding members designated 36.1 are in one plane and the protruding members 36.2 are half a pitch length from the protuberances 36.1 in the axial direction. They are also at ninety degrees with respect to them in the circumferential direction.
  • the tube 26 may be formed with six longitudinal rows of protruding members 37. Again, the rows of protruding members 37 are equally spaced from one another around the circumference of the tube 26, with consecutive sets of opposing complementary protruding members 37.1 , 37.2 and 37.3 being circumferentially staggered with respect to another.
  • liquid flowing through the sterilizer 10 passes through the gaps between the sleeve 27, containing the UV source 34, and the inner wall of the tube 26 with the dimples, indentations, or knobs 36 extending inwardly from the inner wall towards the sleeve 27.
  • the liquid also flows axially between a first set of dimples, indentations, or knobs which lie in one radial plane and then impinges on the staggered protruding members which are one and a half pitch length displaced along the tube from the first set.
  • a disruptive mixing motion is imparted to it by the first set of protruding members encountered along the length of the tube 26.
  • the sets of complementary protruding members 36 staggered along the length of the tube 26 maintain and increase the turbulence which is created in the liquid as is flows through the tube 26.
  • the effect of the particular arrangements of protruding members exemplified above is that turbulence created at the inlet to the tube is not merely maintained throughout the tube, but rather maintained and increased as the liquid hits each consecutive set of complementary protruding members 36. This arrangement is therefore a lot less sensitive to variations in flow rate and fluid viscosity than prior arrangements which rely on the internal configuration of the tube to merely maintain turbulence in the liquid.
  • the disruptive mixing motion created by the complementary protruding members ensures total exposure of the liquid to the UV light prior to the liquid exiting the device.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Zoology (AREA)
  • Organic Chemistry (AREA)
  • Food Science & Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Polymers & Plastics (AREA)
  • Toxicology (AREA)
  • Biochemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • Genetics & Genomics (AREA)
  • Epidemiology (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Physical Water Treatments (AREA)

Abstract

L'invention concerne un dispositif de stérilisation de liquides comprenant un boîtier allongé présentant une entrée et une sortie au niveau d'extrémités opposées de ce dernier et un tube allongé (26) s'étendant le long de la longueur du boîtier allongé, le tube allongé (26) comprenant des ensembles complémentaires d'éléments opposés en saillie (36.1, 36.2), un espace se trouvant entre la source d'UV (34) et la paroi interne du tube et les éléments en saillie (36.1, 36.2) s'étendant depuis ce dernier pour permettre le passage du liquide, de sorte qu'en cours d'utilisation un mouvement de mélange perturbateur est communiqué au liquide par les éléments en saillie à mesure que le liquide passe à travers le tube de l'entrée vers la sortie.
PCT/IB2016/055623 2015-09-21 2016-09-21 Dispositif de stérilisation de liquides Ceased WO2017051322A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1516697.8 2015-09-21
GBGB1516697.8A GB201516697D0 (en) 2015-09-21 2015-09-21 Serillization of liquids

Publications (1)

Publication Number Publication Date
WO2017051322A1 true WO2017051322A1 (fr) 2017-03-30

Family

ID=54544560

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/055623 Ceased WO2017051322A1 (fr) 2015-09-21 2016-09-21 Dispositif de stérilisation de liquides

Country Status (3)

Country Link
AR (1) AR106092A1 (fr)
GB (1) GB201516697D0 (fr)
WO (1) WO2017051322A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909292C (de) * 1950-11-28 1954-04-15 Siemens Ag Einrichtung zur Ultraviolett-Bestrahlung von Fluessigkeiten in Durchflussrohren, insbesondere von fluessigen Lebensmitteln aller Art
FR1310471A (fr) * 1960-11-10 1962-11-30 Chambre de traitement pour stérilisateurs d'eau, de gaz ou autres fluides par les rayons ultra-violets
US4968437A (en) * 1986-05-09 1990-11-06 Electrolux Water Systems, Inc. Fluid purification system
ZA968029B (en) 1995-06-30 1997-04-04 Norbert Willi Vaupel A liquid sterilizer
US5675153A (en) 1993-10-06 1997-10-07 Snowball; Malcolm Robert UV apparatus for fluid treatment
WO2001037675A2 (fr) 1999-10-12 2001-05-31 Hydrozone (Proprietary) Limited Sterilisation de liquides par rayonnement ultra-violet
US20070003430A1 (en) * 2000-11-13 2007-01-04 Klaus Kaiser Method of inactivating microorganisms in a fluid using ultraviolet radiation
WO2014064226A1 (fr) * 2012-10-24 2014-05-01 Ozone Industries Ireland Limited Réacteur à rayonnement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909292C (de) * 1950-11-28 1954-04-15 Siemens Ag Einrichtung zur Ultraviolett-Bestrahlung von Fluessigkeiten in Durchflussrohren, insbesondere von fluessigen Lebensmitteln aller Art
FR1310471A (fr) * 1960-11-10 1962-11-30 Chambre de traitement pour stérilisateurs d'eau, de gaz ou autres fluides par les rayons ultra-violets
US4968437A (en) * 1986-05-09 1990-11-06 Electrolux Water Systems, Inc. Fluid purification system
US5675153A (en) 1993-10-06 1997-10-07 Snowball; Malcolm Robert UV apparatus for fluid treatment
ZA968029B (en) 1995-06-30 1997-04-04 Norbert Willi Vaupel A liquid sterilizer
WO2001037675A2 (fr) 1999-10-12 2001-05-31 Hydrozone (Proprietary) Limited Sterilisation de liquides par rayonnement ultra-violet
US20070003430A1 (en) * 2000-11-13 2007-01-04 Klaus Kaiser Method of inactivating microorganisms in a fluid using ultraviolet radiation
WO2014064226A1 (fr) * 2012-10-24 2014-05-01 Ozone Industries Ireland Limited Réacteur à rayonnement

Also Published As

Publication number Publication date
AR106092A1 (es) 2017-12-13
GB201516697D0 (en) 2015-11-04

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