WO2018037938A1 - Dispositif de stérilisation d'eau courante et procédé de stérilisation d'eau courante - Google Patents

Dispositif de stérilisation d'eau courante et procédé de stérilisation d'eau courante Download PDF

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Publication number
WO2018037938A1
WO2018037938A1 PCT/JP2017/029113 JP2017029113W WO2018037938A1 WO 2018037938 A1 WO2018037938 A1 WO 2018037938A1 JP 2017029113 W JP2017029113 W JP 2017029113W WO 2018037938 A1 WO2018037938 A1 WO 2018037938A1
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WO
WIPO (PCT)
Prior art keywords
light source
straight pipe
flow path
ultraviolet light
bubbles
Prior art date
Application number
PCT/JP2017/029113
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English (en)
Japanese (ja)
Inventor
鉄美 越智
真也 渡邊
Original Assignee
日機装株式会社
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Filing date
Publication date
Application filed by 日機装株式会社 filed Critical 日機装株式会社
Publication of WO2018037938A1 publication Critical patent/WO2018037938A1/fr

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    • 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
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light

Definitions

  • the present invention relates to a running water sterilization apparatus and a running water sterilization method, and more particularly to a technique for sterilizing running water by irradiating ultraviolet light.
  • ultraviolet light has a sterilizing ability
  • an apparatus for irradiating ultraviolet light is used for sterilization treatment at medical or food processing sites.
  • an apparatus for continuously sterilizing a fluid by irradiating a fluid such as water with ultraviolet light is also used.
  • a device in which an ultraviolet LED is arranged on the inner wall of a pipe end of a flow path formed of a straight tubular metal pipe can be cited (for example, see Patent Document 1).
  • the present invention has been made in view of these problems, and one of exemplary purposes thereof is to provide a running water sterilization apparatus and a running water sterilization method with improved sterilization efficiency.
  • a flowing water sterilizer is provided on at least one of a straight pipe that divides a processing flow path and both ends of the straight pipe, and irradiates ultraviolet light in the axial direction of the straight pipe toward the processing flow path.
  • a light source, and a bubble generator that is provided upstream of the processing channel and mixes bubbles with water flowing into the processing channel.
  • the volume occupied by water in the processing channel can be reduced, and the transmittance of ultraviolet light in the processing channel can be increased. it can. Further, the ultraviolet light is scattered, reflected, and refracted by the bubbles, so that the illuminance distribution of the ultraviolet light in the processing flow path can be made uniform and the occurrence of irradiation unevenness can be suppressed. Furthermore, it is possible to prevent the adhesion of dirt to the wall surface in the processing channel by using a shock wave when bubbles are crushed.
  • the light source may be provided at least at the downstream end of the straight pipe.
  • a window member for partitioning between the light source and the processing flow path may be further provided.
  • a deaeration device may be further provided which is provided downstream from the processing channel and removes bubbles from water flowing out from the processing channel.
  • the straight pipe may have at least an inner wall surface made of polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • Another aspect of the present invention is a running water sterilization method.
  • the method includes a step of mixing bubbles with water flowing into a processing flow path partitioned by a straight pipe, and a step of irradiating ultraviolet light in the axial direction of the straight pipe toward water containing bubbles flowing through the processing flow path. .
  • the volume occupied by water in the processing channel can be reduced, and the transmittance of ultraviolet light in the processing channel can be increased. it can. Further, the ultraviolet light is scattered, reflected, and refracted by the bubbles, so that the illuminance distribution of the ultraviolet light in the processing flow path can be made uniform and the occurrence of irradiation unevenness can be suppressed. Furthermore, it is possible to prevent the adhesion of dirt to the wall surface in the processing channel by using a shock wave when bubbles are crushed.
  • the sterilization ability can be improved by increasing the irradiation efficiency of ultraviolet light.
  • FIG. 1 is a diagram schematically showing a configuration of a running water sterilizer 10 according to an embodiment.
  • the running water sterilizer 10 includes a straight pipe 20, an inflow pipe 31, an outflow pipe 32, a first light source 41, a second light source 42, a bubble generator 50, and a deaeration device 60.
  • the flowing water sterilizer 10 is used for mixing the bubbles 70 with the water flowing through the processing flow path 16 defined by the straight pipe 20 and irradiating the water mixed with the bubbles 70 with ultraviolet light to perform sterilization.
  • the straight pipe 20 includes an upstream end 21, a downstream end 22, an inflow port 23, an outflow port 24, a first window member 25, and a second window member 26.
  • the straight pipe 20 extends in the axial direction from the upstream end 21 toward the downstream end 22 and has, for example, a length of three times or more the inner diameter.
  • the upstream end 21 is provided with a first window member 25 that transmits ultraviolet light from the first light source 41, and an inflow port 23 is provided in the vicinity of the first window member 25.
  • the downstream end 22 is provided with a second window member 26 that transmits ultraviolet light from the second light source 42, and an outlet 24 is provided in the vicinity of the second window member 26.
  • First window member 25 and the second window member 26 are quartz (SiO 2), sapphire (Al 2 O 3), consisting of members which has higher transmission in the amorphous fluororesin such ultraviolet light.
  • An inflow pipe 31 extending in a direction intersecting or orthogonal to the axial direction of the straight pipe 20 is attached to the inflow port 23.
  • An outflow pipe 32 extending in a direction intersecting or perpendicular to the axial direction of the straight pipe 20 is attached to the outflow port 24.
  • a first branch pipe 33 is provided in the middle of the inflow pipe 31, and the bubble generator 50 is connected via the first branch pipe 33.
  • a second branch pipe 34 is provided in the middle of the outflow pipe 32, and a deaeration device 60 is connected through the second branch pipe 34.
  • the straight pipe 20 is made of, for example, polytetrafluoroethylene (PTFE) which is a perfluorinated resin.
  • PTFE polytetrafluoroethylene
  • PTFE is a chemically stable material and is excellent in durability, heat resistance and chemical resistance.
  • PTFE is a material having a high reflectivity of ultraviolet light. Therefore, by configuring the straight tube 20 with PTFE, the ultraviolet light emitted from the first light source 41 and the second light source 42 can be propagated in the axial direction of the straight tube 20 while being reflected by the inner wall surface 18.
  • the straight pipe 20 may not be entirely made of PTFE, and the inner wall surface 18 that defines the processing flow path 16 may be made of PTFE.
  • the straight pipe 20 may be configured by attaching a PTFE liner to the inner surface of a pipe made of another resin material or metal material.
  • the inflow pipe 31 and the outflow pipe 32 may be made of the same material as that of the straight pipe 20 or may be made of a material different from that of the straight pipe 20.
  • the first light source 41 and the second light source 42 are so-called UV-LED (Ultra Violet-Light Emitting Diode) light sources including light emitting elements that emit ultraviolet light. It is preferable that the light emitting element included in the light source emits ultraviolet light having a central wavelength or peak wavelength in the range of about 200 nm to 350 nm and having a high bactericidal efficiency in the vicinity of 260 nm to 270 nm.
  • an ultraviolet light LED for example, one using aluminum gallium nitride (AlGaN) is known.
  • the first light source 41 is disposed in the first light source chamber 11 defined between the upstream end 21 and the first window member 25.
  • the first light source 41 is arranged so as to irradiate ultraviolet light in the axial direction toward the processing channel 16 through the first window member 25.
  • the second light source 42 is disposed in the second light source chamber 12 defined between the downstream end 22 and the second window member 26.
  • the second light source 42 is disposed so as to irradiate ultraviolet light in the axial direction toward the processing channel 16 through the second window member 26.
  • the first light source 41 and the second light source 42 are mounted on a substrate whose base material is copper (Cu), aluminum (Al), or the like.
  • the first light source 41 and the second light source 42 may include an adjustment mechanism for adjusting the light distribution angle of the light emitting element.
  • the adjustment mechanism adjusts the emission angle so that the orientation angle becomes 30 degrees or less.
  • the adjustment mechanism may be constituted by a transmission type optical system such as a lens, or may be constituted by a reflection type optical system such as a concave mirror. By using such an adjustment mechanism, the incident angle of the ultraviolet light incident on the inner wall surface 18 of the processing channel 16 can be made to be 75 degrees or more.
  • the present inventors know that the reflectance on the surface becomes very high when the incident angle to the PTFE is 70 degrees or more. Therefore, by adjusting the alignment angle of the ultraviolet light by the adjusting mechanism, it is possible to propagate the ultraviolet light having a higher intensity far.
  • the bubble generating device 50 generates bubbles 70 in the water flowing into the processing channel 16 from the inlet 23 and mixes the bubbles 70 with the water flowing through the processing channel 16.
  • the size of the bubbles generated by the bubble generator 50 is not particularly limited, but is preferably a bubble size that can effectively scatter ultraviolet light. It may be a microbubble (bubble diameter: about 1 ⁇ m to 100 ⁇ m).
  • the component of the bubble 70 generated by the bubble generator 50 is not particularly limited, and may be nitrogen (N 2 ), oxygen (O 2 ), carbon dioxide (CO 2 ), or air containing these.
  • the deaeration device 60 removes the bubbles 70 contained in the water flowing out from the outlet 24 so that the water in which the bubbles 70 are reduced or removed flows out from the outflow pipe 32.
  • the flowing water sterilizer 10 mixes the bubbles 70 with the water flowing through the treatment channel 16 and irradiates the water containing the bubbles 70 with ultraviolet light. Since the transmittance of ultraviolet light is higher in air than in water, the transmittance of ultraviolet light traveling in the axial direction can be increased by increasing the volume ratio of bubbles in the processing channel and decreasing the volume ratio of water. Can be increased. In addition, the ultraviolet light is scattered, reflected, and refracted by the bubbles 70 to uniformize the illuminance distribution of the ultraviolet light in the processing flow path 16, thereby causing uneven irradiation that causes a portion where the amount of ultraviolet light irradiation is partially insufficient. Can be prevented. By suppressing the irradiation unevenness, it is possible to prevent water that has not been sufficiently sterilized from partially passing through and to enhance the sterilizing effect.
  • the present embodiment it is possible to prevent dirt from adhering to the inner wall surface 18 of the processing flow path 16 using a shock wave when the bubbles 70 are crushed, and to suppress a decrease in the irradiation intensity of ultraviolet light.
  • a window member having a relatively small opening corresponding to the water flow cross-sectional area of the straight pipe 20 is used, there is a possibility that the irradiation intensity of ultraviolet light may be greatly reduced due to local contamination of the window member.
  • the first window member 25 is located in the vicinity of the inlet 23 where the direction of water flow changes in an L shape, and many bubbles 70 are formed on the inner surface of the first window member 25 due to turbulent flow accompanying the change in water flow.
  • the dirt on the inner surface of the first window member 25 is effectively removed by the collision and collapse of the bubble 70.
  • the second window member 26 is provided at the end of the axially extending flow path, many of the bubbles 70 from the processing flow path 16 toward the outlet 24 collide with the second window member 26, and the second window member 26 The dirt on the inner surface of 26 is effectively removed.
  • a light source may be provided only in either one of the both ends of the straight tube 20.
  • only the first light source 41 may be provided, or only the second light source 42 may be provided.
  • the running water sterilizer may be configured not to include the deaerator 60. In this case, the water containing the bubbles 70 may flow out from the outflow pipe 32 to the outside.
  • the device has been described as a device for sterilizing water by irradiating it with ultraviolet light.
  • this apparatus may be used for a purification treatment for decomposing organic substances contained in water by irradiation with ultraviolet light.
  • DESCRIPTION OF SYMBOLS 10 ... Running water sterilizer, 16 ... Processing flow path, 18 ... Inner wall surface, 20 ... Straight pipe, 21 ... Upstream side end, 22 ... Downstream side end, 23 ... Inlet, 24 ... Outlet, 25 ... 1st Window member, 26 ... second window member, 41 ... first light source, 42 ... second light source, 50 ... bubble generator, 60 ... deaerator, 70 ... air bubbles.
  • the sterilization ability can be improved by increasing the irradiation efficiency of ultraviolet light.

Abstract

La présente invention comprend : un tuyau droit (20) qui sépare une trajectoire d'écoulement de traitement (16) ; une source de lumière (une première source de lumière (41) ou une seconde source de lumière (42)) qui est disposée dans au moins l'une de deux sections d'extrémité (une section d'extrémité côté amont (21) et une section d'extrémité côté aval (22)) du tuyau droit (20) et émet une lumière ultraviolette en direction de la trajectoire d'écoulement de traitement (16), dans la direction axiale du tuyau droit (20) ; et un dispositif de génération de bulles (50) qui est disposé plus en amont que la trajectoire d'écoulement de traitement (16) et mélange les bulles (70) dans l'eau qui s'écoule dans la trajectoire d'écoulement de traitement (16). Un élément fenêtre (un premier élément fenêtre (25) ou un second élément fenêtre (26)) peut également être prévu qui se sépare entre la source de lumière et la trajectoire d'écoulement de traitement.
PCT/JP2017/029113 2016-08-23 2017-08-10 Dispositif de stérilisation d'eau courante et procédé de stérilisation d'eau courante WO2018037938A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016163129A JP2018030077A (ja) 2016-08-23 2016-08-23 流水殺菌装置および流水殺菌方法
JP2016-163129 2016-08-23

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WO2018037938A1 true WO2018037938A1 (fr) 2018-03-01

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7035337B2 (ja) * 2017-05-22 2022-03-15 三菱電機株式会社 殺菌装置及び給湯装置
JP2021049005A (ja) * 2019-09-24 2021-04-01 東芝ライテック株式会社 流体殺菌装置
JP7398243B2 (ja) 2019-10-30 2023-12-14 スタンレー電気株式会社 流体殺菌装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010147544A1 (fr) * 2009-06-15 2010-12-23 Wallenius Water Aktiebolag Procédé et dispositif de traitement d'eau par exposition à un rayonnement uv
US20110120957A1 (en) * 2005-02-03 2011-05-26 Wallenius Water Aktiebolag Method for Treating Liquids
JP2012040505A (ja) * 2010-08-19 2012-03-01 Photoscience Japan Corp 液体処理装置
JP2014018721A (ja) * 2012-07-17 2014-02-03 Sharp Corp 光触媒、その製造方法および浄化装置
JP2014061483A (ja) * 2012-09-21 2014-04-10 Chiyoda Kohan Co Ltd 中圧外照式紫外線照射装置及びバラスト水の微生物不活化装置
JP2014076422A (ja) * 2012-10-10 2014-05-01 Eagle Industry Co Ltd 殺菌装置
JP5936743B1 (ja) * 2015-05-13 2016-06-22 株式会社日立製作所 有機物分解装置及び有機物分解方法
JP2016523594A (ja) * 2013-05-22 2016-08-12 メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツングＭｅｒｃｋ Ｐａｔｅｎｔ Ｇｅｓｅｌｌｓｃｈａｆｔ ｍｉｔ ｂｅｓｃｈｒａｅｎｋｔｅｒ Ｈａｆｔｕｎｇ 殺生物性浄化リアクタ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110120957A1 (en) * 2005-02-03 2011-05-26 Wallenius Water Aktiebolag Method for Treating Liquids
WO2010147544A1 (fr) * 2009-06-15 2010-12-23 Wallenius Water Aktiebolag Procédé et dispositif de traitement d'eau par exposition à un rayonnement uv
JP2012040505A (ja) * 2010-08-19 2012-03-01 Photoscience Japan Corp 液体処理装置
JP2014018721A (ja) * 2012-07-17 2014-02-03 Sharp Corp 光触媒、その製造方法および浄化装置
JP2014061483A (ja) * 2012-09-21 2014-04-10 Chiyoda Kohan Co Ltd 中圧外照式紫外線照射装置及びバラスト水の微生物不活化装置
JP2014076422A (ja) * 2012-10-10 2014-05-01 Eagle Industry Co Ltd 殺菌装置
JP2016523594A (ja) * 2013-05-22 2016-08-12 メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツングＭｅｒｃｋ Ｐａｔｅｎｔ Ｇｅｓｅｌｌｓｃｈａｆｔ ｍｉｔ ｂｅｓｃｈｒａｅｎｋｔｅｒ Ｈａｆｔｕｎｇ 殺生物性浄化リアクタ
JP5936743B1 (ja) * 2015-05-13 2016-06-22 株式会社日立製作所 有機物分解装置及び有機物分解方法

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