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WO2016136423A1 - Dispositif d'irradiation de surface interne par faisceau d'électrons - Google Patents

Dispositif d'irradiation de surface interne par faisceau d'électrons Download PDF

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Publication number
WO2016136423A1
WO2016136423A1 PCT/JP2016/053442 JP2016053442W WO2016136423A1 WO 2016136423 A1 WO2016136423 A1 WO 2016136423A1 JP 2016053442 W JP2016053442 W JP 2016053442W WO 2016136423 A1 WO2016136423 A1 WO 2016136423A1
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WO
WIPO (PCT)
Prior art keywords
electron beam
beam irradiation
corrosion
nozzle
irradiation apparatus
Prior art date
Application number
PCT/JP2016/053442
Other languages
English (en)
Japanese (ja)
Inventor
浩一 生杉
武史 野田
福田　直晃
Original Assignee
日立造船株式会社
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 日立造船株式会社 filed Critical 日立造船株式会社
Publication of WO2016136423A1 publication Critical patent/WO2016136423A1/fr

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/04—Sterilising wrappers or receptacles prior to, or during, packaging
    • B65B55/08—Sterilising wrappers or receptacles prior to, or during, packaging by irradiation
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K5/00—Irradiation devices
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K5/00—Irradiation devices
    • G21K5/04—Irradiation devices with beam-forming means

Definitions

  • the present invention relates to an inner surface electron beam irradiation apparatus for sterilizing the inner surface of an object to be sterilized such as a container by electron beam irradiation.
  • equipment that irradiates a container with an electron beam is used as a facility for surely sterilizing the container.
  • an outer surface electron beam irradiation device that irradiates the outer surface of the container with an electron beam, and an inner surface electron beam irradiation device that irradiates the inner surface of the container with an electron beam And are provided.
  • the container is surely sterilized, but corrosive gases such as ozone and nitric acid are generated by a chemical reaction by the electron beam.
  • a ventilator for promoting the discharge of the corrosive gas is also provided in the equipment.
  • the inner surface electron beam irradiation apparatus irradiates the inner surface of the container with an electron beam from the exit window of the electron beam irradiation nozzle while inserting the electron beam irradiation nozzle into the container from the opening. Since the corrosive gas tends to remain inside the container even when the ventilator is operated, the electron beam irradiation nozzle is exposed to the corrosive gas. For this reason, the electron beam irradiation nozzle is more easily corroded than other devices and equipment of the facility. In order to prevent such corrosion, it is conceivable to apply a conventional technique (see, for example, Patent Document 1) to cover the emission window of the electron beam irradiation nozzle with a catalyst film.
  • the corrosive gas remaining inside the container has a strong oxidizing power and cannot sufficiently prevent corrosion.
  • the portion other than the exit window that is, the side surface of the electron beam irradiation nozzle
  • the electron beam irradiation nozzle to which the above prior art is applied still has a short life.
  • since corrosive gas with strong oxidizing power remains inside the container it is dangerous to discharge the container, which is the object of sterilization, outside the facility as it is.
  • an object of the present invention is to provide an inner surface electron beam irradiation apparatus capable of extending the life.
  • an inner surface electron beam irradiation apparatus is an inner surface electron beam irradiation apparatus that sterilizes an inner surface of an object to be sterilized with an opening formed by electron beam irradiation,
  • An electron beam irradiation nozzle for irradiating an inner surface of the sterilization object with an electron beam while being inserted into the sterilization object from the opening is provided,
  • the electron beam irradiation nozzle includes an emission window that emits an electron beam, a nozzle body that holds the emission window, and a protective film that covers the nozzle body.
  • the inner surface electron beam irradiation apparatus according to claim 2 of the present invention has corrosion resistance on the entire surface of the portion in which the protective film in the inner surface electron beam irradiation apparatus according to claim 1 is inserted into the sterilization object.
  • the portion inserted into the object to be sterilized has catalytic properties.
  • a large number of protective films in the inner surface electron beam irradiation apparatus according to claim 2 are supported on the corrosion resistant layer having corrosion resistance and the outer surface of the corrosion resistant layer. And a catalytic body having catalytic properties.
  • the inner surface electron beam irradiation apparatus according to claim 4 of the present invention is such that the corrosion-resistant layer in the inner surface electron beam irradiation apparatus according to claim 3 also has conductivity.
  • the protective film includes an insulating layer disposed between the corrosion-resistant layer and the nozzle body, A charging power source for applying a voltage to the corrosion-resistant layer and the nozzle body is provided.
  • the charging power source in the inner surface electron beam irradiation apparatus according to claim 4 applies a pulsed voltage to the corrosion-resistant layer and the nozzle body. is there.
  • An inner surface electron beam irradiation apparatus is the inner surface electron beam irradiation apparatus according to any one of claims 2 to 5, wherein energy for improving the catalytic property of the protection film is applied to the protection film.
  • the energy supply part which supplies to is provided.
  • the life can be extended.
  • FIG. 1 It is a schematic perspective view which shows the inner surface electron beam irradiation apparatus which concerns on embodiment of this invention. It is a schematic side view which shows the electron beam emitter of the inner surface electron beam irradiation apparatus. It is the partially cutaway side view which expanded the electron beam irradiation nozzle of the electron beam emitter, and the PET bottle in which this electron beam irradiation nozzle is inserted. It is a partially cutaway side view which shows the example in which the same inner surface electron beam irradiation apparatus was provided with the energy supply part.
  • This electron beam sterilization facility is a facility that sterilizes by irradiating an electron beam while conveying an object to be sterilized in which an opening is formed.
  • the sterilization target in which the opening is formed is, for example, a container such as a plastic bottle or a preform body.
  • the preform body is a raw material body before being formed into a PET bottle by blow molding, and has a test tube shape.
  • the sterilization object in which the opening is formed will be described as a PET bottle.
  • the electron beam sterilization facility generally includes a transport device that continuously transports a large number of PET bottles from the upstream side to the downstream side, and an electron beam continuously on the outer surface of the PET bottle transported to the transport device. And an inner surface electron beam irradiation device that continuously irradiates the inner surface of the PET bottle transported to the transport device on the downstream side with the electron beam.
  • the PET bottles that are insufficiently sterilized by electron beam irradiation need to be discarded as defective products.
  • a reject device that performs this disposal is also provided in the electron beam sterilization facility.
  • corrosive gases such as ozone and nitric acid are generated by the electron beam irradiation. Since this corrosive gas causes corrosion of each device of the electron beam sterilization facility, it must be discharged to the outside of the electron beam sterilization facility.
  • a ventilation device that promotes the discharge is also provided in the electron beam sterilization facility.
  • this inner surface electron beam irradiation device continuously sterilizes the inner surfaces of a large number of PET bottles 1 transported to the circular path 4 by the transport device.
  • the inner surface electron beam irradiation device 10 is positioned above the circular path 4 and is concentric with the circular path 4.
  • a large number of the turntables 11 are arranged on the turntable 11 and positioned immediately above the circular path 4.
  • the electron beam emitter 12 mainly includes a vacuum chamber 21 whose inside is a vacuum atmosphere, a fixture 22 for fixing the vacuum chamber 21 to the turntable 11, and a downward direction from the vacuum chamber 21.
  • An extending electron beam irradiation nozzle 23 is included.
  • the vacuum chamber 21 is configured to generate a large number of electrons and accelerate downward by arranging an electron generation source therein.
  • the electron beam irradiation nozzle 23 communicates with the vacuum chamber 21 and has a vacuum atmosphere inside.
  • the electron beam irradiation nozzle 23 emits a large number of electrons accelerated in the vacuum chamber 21 from the lower end as an electron beam. Therefore, in order to sterilize the inner surface of the plastic bottle 1, the electron beam irradiation nozzle 23 is inserted into the interior of the plastic bottle 1 through the opening 2 as shown in FIGS. Must be irradiated with an electron beam. Therefore, an elevating device for inserting the electron beam irradiation nozzle 23 into the inside of the PET bottle 1 from the opening 2 by raising the PET bottle 1 from the circular path 4 is also provided in the electron beam sterilization facility, although not shown. It is done.
  • the electron beam irradiation nozzle 23 has, as a conventional configuration, an emission window 31 that emits the electron beam 5 and a cylindrical nozzle body 32 that holds the emission window 31 at the lower end. .
  • the electron beam irradiation nozzle 23 has a characteristic configuration of the present invention, and is a corrosion-resistant catalyst film (an example of a protective film) that covers the entire surface of the nozzle body 32 that is inserted into the interior 3 of the PET bottle 1. 33).
  • the corrosion-resistant catalyst film 33 may cover the nozzle body 32 other than the portion inserted into the interior 3 of the plastic bottle 1.
  • the corrosion-resistant catalyst film 33 has corrosion resistance on the entire surface of the portion inserted into the interior 3 of the PET bottle 1 and also has catalytic properties at the portion inserted into the interior 3 of the PET bottle 1. is there.
  • the portion having the catalytic property may be a portion that is easily exposed to the corrosive gas remaining in the interior 3 of the PET bottle 1 for a relatively long time, specifically, a lower portion of the nozzle body 32. preferable.
  • the corrosion-resistant catalyst film 33 is formed on, for example, a corrosion-resistant layer 34 that covers the nozzle body 32 over the entire surface inserted into the interior 3 of the PET bottle 1, and a lower outer surface of the corrosion-resistant layer 34.
  • a large number of supported catalyst bodies 35 A material having higher corrosion resistance than the nozzle body 32 is used for the corrosion resistant layer 34. In order to increase the probability of contacting the corrosive gas, the large number of catalyst bodies 35 are arranged such that the distance between adjacent ones is constant.
  • the corrosion-resistant layer 34 and the nozzle body 32 also have conductivity.
  • the corrosion-resistant catalyst film 33 also includes an insulating layer 36 disposed between the corrosion-resistant layer 34 and the nozzle body 32 in order to insulate the corrosion-resistant layer 34 and the nozzle body 32.
  • the inner surface electron beam irradiation apparatus 10 also includes a charging power source 14 that applies a voltage to the corrosion-resistant layer 34 and the nozzle body 32.
  • the charging power source 14 charges the corrosion-resistant layer 34 positively and charges the nozzle body 32 negatively by applying the voltage.
  • the positively charged corrosion-resistant layer 34 leads the corrosive gas to the catalyst body 35 by attracting the negatively charged corrosive gas by the electron beam 5.
  • the voltage may be constant or pulsed. Since the voltage is pulsed, the corrosive gas is intermittently attracted by the corrosion-resistant layer 34, so that the probability of guiding the corrosive gas to the catalyst body 35 is increased.
  • the negatively charged nozzle body 32 further converges the electron beam 5 passing through the nozzle body 32 toward the axial center side of the nozzle body 32 by repulsive force. Since the number of electrons passing through the unit area is further increased, the electron beam 5 further converged in this way further improves the efficiency of sterilization.
  • the nozzle body 32 is made of a conventionally used material such as stainless steel.
  • the corrosion-resistant layer 34 having the above conductivity a material having higher corrosion resistance than the nozzle body 32, for example, titanium, anodized aluminum or the like is used.
  • the corrosion-resistant layer 34 having conductivity also includes iron, zirconium, molybdenum, rhodium, palladium, silver, tantalum, tungsten, iridium, platinum or gold, oxide, carbide, nitride, or these.
  • An alloy containing two or more types is used.
  • the corrosion-resistant layer 34 having conductivity may have a two-layer structure of an inner layer having conductivity and an outer layer having corrosion resistance.
  • the inner layer having conductivity is copper or the like
  • the outer layer having corrosion resistance is fluorine resin or the like.
  • the catalyst body 35 is made of a simple substance such as titanium, lead, or cobalt, an oxide, or an alloy containing these.
  • platinum, gold, palladium, rhodium, and iridium are used for the catalyst body 35.
  • the insulating layer 36 is preferably made of a material having heat resistance and corrosion resistance, such as silicon, silicon oxide, glass, ceramic, or fluorine resin.
  • the insulating layer 36 is preferably porous so that heat generated in the nozzle body 32 is easily released.
  • a large number of PET bottles 1 with the opening 2 on the top are continuously transported to the circular path 4 below the inner surface electron beam irradiation device 10 by the transport device.
  • the electron beam irradiation nozzle 23 is inserted into the inside 3 from the opening 2.
  • the electron beam 5 is irradiated from the electron beam irradiation nozzle 23 to the inner surface of the PET bottle 1, as shown in FIG.
  • the one in the inside of the PET bottle 1 is not easily discharged to the outside of the electron beam sterilization facility by the ventilator, and much remains as it is.
  • the corrosive gas remaining in the inside 3 of the PET bottle 1 is rendered harmless by the catalytic property (specifically, the catalyst body 35) provided in the corrosion-resistant catalyst film 33 of the electron beam irradiation nozzle 23.
  • the electron beam irradiation nozzle 23 inserted into the interior 3 of the PET bottle 1 does not corrode. Even if the corrosive gas is not completely detoxified, the electron beam irradiation nozzle 23 inserted into the interior 3 of the PET bottle 1 does not corrode due to the corrosion resistance of the corrosion-resistant catalyst film 33.
  • corrosive gas is guided to the catalyst body 35 by the electroconductivity of the corrosion-resistant layer 34 and the nozzle body 32, which is a preferable configuration of the electron beam irradiation nozzle 23, the insulating layer 36, and the charging power source 14.
  • the detoxification of the corrosive gas is promoted, so that the electron beam irradiation nozzle 23 is not further corroded.
  • the electron beam irradiation nozzle 23 does not corrode, so the life can be extended. Moreover, since the corrosive gas remaining in the interior 3 of the PET bottle 1 is rendered harmless, the PET bottle 1 can be safely discharged.
  • the conductivity of the corrosion resistant layer 34 and the nozzle body 32, the insulating layer 36, and the charging power source 14 promote the detoxification of the corrosive gas.
  • the plastic bottle 1 can be discharged more safely.
  • An energy supply unit 16 may be provided to supply any portion that is provided.
  • the energy 6 is, for example, light energy and / or heat energy, and an appropriate one is selected depending on the material of the catalyst body 35. Since the detoxification of the corrosive gas is further promoted by improving the catalytic properties of the corrosion-resistant catalyst film 33, the lifetime can be further increased and the PET bottle 1 can be discharged more safely. .
  • the said corrosion-resistant layer 34 is covered instead of such a catalyst body 35.
  • FIG. It may be a catalyst layer.
  • the material used as the catalyst can be reduced.
  • the corrosion-resistant catalyst film 33 has been described as an example of the protective film in the above embodiment, the present invention is not limited to this, and any film that protects the nozzle body 32 may be used.
  • the corrosion-resistant catalyst film 33 has been described as including the corrosion-resistant layer 34 and the catalyst body 35 (preferably also the insulating layer 36).
  • the present invention is not limited to this, and the insulating corrosion-resistant film.
  • a catalyst may be supported on a membrane.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

L'invention concerne un dispositif d'irradiation de surface interne par faisceau d'électrons pour stériliser la surface interne d'une bouteille en PET (1) par irradiation avec un faisceau d'électrons (5). Le dispositif d'irradiation de surface interne par faisceau d'électrons comprend une buse d'irradiation par faisceau d'électrons (23) qui irradie la surface interne (3) de la bouteille en PET (1) à l'aide du faisceau d'électrons (5) tout en étant introduite dans l'espace interne de la bouteille en PET (1) via une ouverture (2). La buse d'irradiation par faisceau d'électrons (23) comprend une fenêtre de sortie (31) depuis laquelle le faisceau d'électrons (5) sort, un corps principal de buse (32) supportant la fenêtre de sortie (31), et une membrane de catalyseur résistant à la corrosion (33) qui recouvre le corps principal de buse (32).
PCT/JP2016/053442 2015-02-23 2016-02-05 Dispositif d'irradiation de surface interne par faisceau d'électrons WO2016136423A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-032387 2015-02-23
JP2015032387A JP2016154571A (ja) 2015-02-23 2015-02-23 内面電子線照射装置

Publications (1)

Publication Number Publication Date
WO2016136423A1 true WO2016136423A1 (fr) 2016-09-01

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10142399A (ja) * 1996-11-14 1998-05-29 Nippon Telegr & Teleph Corp <Ntt> Ｘ線取り出し窓
JP2000334294A (ja) * 1999-05-31 2000-12-05 Shinmeiwa Auto Engineering Ltd 代替フロンのプラズマアーク分解方法及び装置
JP2003053178A (ja) * 2001-08-13 2003-02-25 Dkk Toa Corp 光酸化器
JP2005241588A (ja) * 2004-02-27 2005-09-08 Mitsubishi Heavy Ind Ltd 電子線照射装置、オゾン環境内銅基体、及び、それの保護方法
JP2014134548A (ja) * 2006-02-14 2014-07-24 Hitachi Zosen Corp 電子ビーム照射器および電子ビーム発生方法
JP2014221642A (ja) * 2013-05-13 2014-11-27 日立造船株式会社 遮蔽体および電子線容器滅菌設備

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10142399A (ja) * 1996-11-14 1998-05-29 Nippon Telegr & Teleph Corp <Ntt> Ｘ線取り出し窓
JP2000334294A (ja) * 1999-05-31 2000-12-05 Shinmeiwa Auto Engineering Ltd 代替フロンのプラズマアーク分解方法及び装置
JP2003053178A (ja) * 2001-08-13 2003-02-25 Dkk Toa Corp 光酸化器
JP2005241588A (ja) * 2004-02-27 2005-09-08 Mitsubishi Heavy Ind Ltd 電子線照射装置、オゾン環境内銅基体、及び、それの保護方法
JP2014134548A (ja) * 2006-02-14 2014-07-24 Hitachi Zosen Corp 電子ビーム照射器および電子ビーム発生方法
JP2014221642A (ja) * 2013-05-13 2014-11-27 日立造船株式会社 遮蔽体および電子線容器滅菌設備

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