JP2008136940A - Ultraviolet disinfection instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet disinfection instrument capable of safely and precisely disinfecting treated water with ultraviolet rays by allowing no foreign matters to get mixed in the treated water. <P>SOLUTION: The ultraviolet disinfection instrument is equipped with a dielectric tube 7 pervious to ultraviolet rays and permitting the treated water to flow in and the ultraviolet ray source 6 arranged outside the dielectric tube 7. The ultraviolet ray source 6 comprises a light emission tube 10 having a double glass tube structure which surrounds the whole outside periphery of the dielectric tube 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ultraviolet disinfection device using ultraviolet rays.

  Chemicals such as ozone and chlorine are used to sterilize, disinfect and decolorize water and sewage, deodorize and decolorize industrial water, bleach pulp, and sterilize medical equipment.

  In conventional disinfection devices, a stirrer such as a retention tank or spray pump is required to dissolve ozone and chemicals uniformly in the treated water, but it has not been able to respond sufficiently to changes in water quality and water volume. .

  On the other hand, ultraviolet light has effects such as sterilization, disinfection, decolorization, deodorization and decoloration of industrial water, or bleaching of pulp, and ultraviolet treatment is performed to respond immediately to changes in water quality and water volume. .

However, such an ultraviolet disinfection device has the following problems.
(1) In an ultraviolet disinfection device configured to immerse an ultraviolet light source such as a lamp in a water channel, in the case of an open channel installation type, there is a high possibility that germs in the air enter the treated water. In addition, in-line installation type UV disinfection devices have a risk of foreign matter entering the treated water if the watertight container or protective tube containing the lamp is damaged.
(2) It was difficult to irradiate ultraviolet light uniformly from the outside to the treated water flowing inside the water channel from the straight tube-shaped ultraviolet lamp.
(3) Direct exposure to ultraviolet light is harmful to the human body, and a protective cover is required to prevent leakage outside the ultraviolet light.
(4) It is necessary to provide a plurality of ultraviolet light sources in preparation for failure of the apparatus.
(5) A removal mechanism is necessary because the inorganic component contained in the treated water reacts with the ultraviolet light, and dirt that shields the ultraviolet light adheres to the water channel.
(6) It is necessary to manage the amount of irradiated ultraviolet rays so that the treated water maintains the disinfection performance.
(7) It is necessary to provide a function of stopping the water supply of the treated water at the time of leakage from the water channel through which the treated water flows.

  The present invention has been made in consideration of the above points, and provides an ultraviolet disinfection apparatus that can perform disinfection of ultraviolet rays on treated water safely and accurately without contamination of the treated water. Objective.

  The present invention includes a dielectric tube that can transmit ultraviolet light and into which treated water flows, and an ultraviolet light source disposed outside the dielectric tube. It is an ultraviolet disinfection device characterized by disinfecting the treated water.

  The present invention is the ultraviolet disinfection device characterized in that the ultraviolet light source is composed of an arc tube having a double glass tube structure.

  According to the present invention, an ultraviolet reflector that covers the ultraviolet light source and guides the ultraviolet light from the ultraviolet light source to the dielectric tube and prevents leakage of the ultraviolet light to the outside is provided outside the ultraviolet light source. This is a featured ultraviolet disinfection device.

  The present invention is characterized in that an ultraviolet reflecting film for guiding ultraviolet light from the arc tube to the dielectric tube and preventing leakage of the ultraviolet light to the outside is formed on the outer surface of the arc tube having a double glass tube structure. It is an ultraviolet disinfection device.

  According to the present invention, the ultraviolet light source includes a plurality of light source units, and the number of lightings of these light source units is controlled by a control unit.

  The present invention is an ultraviolet disinfection device in which a brush for cleaning the inner surface of a dielectric tube is disposed in the dielectric tube.

  The present invention is an ultraviolet disinfection device characterized in that a monitor element for monitoring the amount of ultraviolet light in the ultraviolet tube is disposed in the dielectric tube.

  The present invention is an ultraviolet disinfection device characterized in that a water leakage sensor for detecting water leakage from the inside of the dielectric tube is provided outside the dielectric tube.

  According to the present invention, disinfection of treated water can be performed safely and accurately without contamination of foreign matter in treated water.

First Embodiment Next, a first embodiment of the present invention will be described with reference to FIGS.

  First, referring to FIG. 1, an example of a water treatment system is shown in FIG. Raw water 1 taken from a river, lake or groundwater is led to an ultraviolet disinfection device 4 through a coagulation sedimentation basin 2 and an activated carbon filtration basin 3, and after being sterilized, passes through a chlorine injecting section 5 and is then used in general households and offices. To be distributed.

  Next, the ultraviolet disinfection device 4 will be described with reference to FIG.

  As shown in FIG. 2, the ultraviolet disinfection device 4 includes a cylindrical dielectric tube 7 that can transmit ultraviolet rays and into which treated water flows, and a flat-plate ultraviolet light source disposed outside the dielectric tube 7. 6 is provided. The treated water in the dielectric tube 7 is sterilized by the ultraviolet light from the ultraviolet light source 6.

  As the flat ultraviolet light source 6, lamps (light emitting tubes) or ultraviolet light emitting LEDs arranged in an array and arranged in a flat plate shape may be used.

  The dielectric tube 7 is made of quartz glass, fluorine chemical resin PFA, or the like.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, treated water 1 containing virus, bacteria, etc. is introduced into the dielectric tube 7, and during this time, ultraviolet light 9 is irradiated from the ultraviolet light source 6 to the treated water in the dielectric tube 7.

  In this way, the treated water in the dielectric tube 7 is sterilized by the ultraviolet light 9.

  According to the present embodiment, foreign matters are not mixed into the treated water, and ultraviolet sterilization of the treated water can be performed safely and accurately.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG.

  The second embodiment shown in FIG. 3 is different only in that the ultraviolet ray 6 is composed of an arc tube 10 having a double glass tube structure, and other configurations are the same as those of the first embodiment shown in FIGS. It is almost the same as the form.

  3, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the arc tube 10 having a double glass tube structure is formed in a cylindrical shape and is disposed so as to surround the entire outer periphery of the dielectric tube 7, and the ultraviolet light 9 from the arc tube 10 is received. The dielectric tube 7 can be irradiated uniformly.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG.

  In the third embodiment shown in FIG. 4, the ultraviolet light source 6 is composed of an arc tube 10 having a double glass tube structure, and an ultraviolet reflector 11 that covers the arc tube 10 is provided outside the arc tube 10. However, the other configuration is substantially the same as that of the first embodiment shown in FIGS.

  In FIG. 4, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the arc tube 10 having a double glass tube structure is formed in a cylindrical shape and is disposed so as to surround the entire outer periphery of the dielectric tube 7, and the ultraviolet light 9 from the arc tube 10 is received. The dielectric tube 7 can be irradiated uniformly. Further, an ultraviolet reflector 11 that covers the arc tube 10 and guides the ultraviolet light 9 from the arc tube 10 toward the dielectric tube 7 is provided outside the arc tube 10 having a double glass tube structure. The ultraviolet reflector 11 has a cylindrical shape and also functions as a protective cover that prevents the ultraviolet light 9 from the arc tube 10 from leaking outward.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG.

  The fourth embodiment shown in FIG. 5 is different only in that the ultraviolet light source 6 is composed of an arc tube 10 having a double glass tube structure and that an ultraviolet reflecting film 12 is formed on the outer surface of the arc tube 10. Other configurations are substantially the same as those of the first embodiment shown in FIGS.

  5, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the arc tube 10 having a double glass tube structure is formed in a cylindrical shape and is disposed so as to surround the entire outer periphery of the dielectric tube 7, and the ultraviolet light 9 from the arc tube 10 is received. The dielectric tube 7 can be irradiated uniformly. Further, an ultraviolet reflecting film 12 is formed on the outer surface of the arc tube 10 having a double glass tube structure so as to cover the arc tube 10 and guide the ultraviolet light 9 from the arc tube 10 to the dielectric tube 7 side. The ultraviolet reflection film 12 also prevents the ultraviolet light from the arc tube 10 from leaking outward.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIG.

  The fifth embodiment shown in FIG. 6 differs only in that the ultraviolet light source 6 is composed of a plurality of arc tubes 10 having a double glass tube structure and that an ultraviolet reflecting film 12 is formed on the outer surface of each arc tube 10. In other respects, the configuration is substantially the same as that of the first embodiment shown in FIGS.

  In FIG. 6, the same parts as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, a plurality of, for example, three arc tubes 10 having a double glass tube structure are formed in a cylindrical shape and are disposed so as to surround the entire outer periphery of the dielectric tube 7. It is possible to uniformly irradiate the dielectric tube 7 with the ultraviolet light 9 from. Each of these three arc tubes 10 is also referred to as a light source unit. Further, an ultraviolet reflecting film 12 is formed on the outer surface of the three arc tubes 10 having a double glass tube structure so as to cover the arc tube 10 and guide the ultraviolet light 9 from the arc tube 10 toward the dielectric tube 7. The ultraviolet reflection film 12 also prevents the ultraviolet light 9 from the arc tube 10 from leaking outward. Further, the number of lighting of each arc tube 10, 10, 10 is controlled by the control unit 10a. In this case, as will be described later, a monitor element 14 for monitoring the amount of ultraviolet light is disposed in the dielectric tube 7, and the control unit 10 a controls the arc tube 10, 10, 10 based on a signal from the monitor element 14. You may control the number of lighting.

Sixth Embodiment Next, a sixth embodiment of the present invention will be described with reference to FIG.

  The sixth embodiment shown in FIG. 7 is different from the sixth embodiment only in that a brush 13 for cleaning the inner surface of the dielectric tube 7 is arranged in the dielectric tube 7, and the other configuration is the third embodiment shown in FIG. The form is substantially the same.

  In FIG. 7, the same parts as those of the third embodiment shown in FIG.

  As shown in FIG. 7, the arc tube 10 having a double glass tube structure is formed in a cylindrical shape and is disposed so as to surround the entire outer periphery of the dielectric tube 7, and the ultraviolet light 9 from the arc tube 10 is received. The dielectric tube 7 can be irradiated uniformly. Further, a cylindrical ultraviolet reflector 11 that covers the arc tube 10 and guides the ultraviolet light 9 from the arc tube 10 toward the dielectric tube 7 is provided outside the arc tube 10 having a double glass tube structure. . A brush 13 is disposed in the dielectric tube 7. When the inorganic component contained in the treated water 1 reacts with the ultraviolet light 9 and the reaction product adheres to the inner surface of the dielectric tube 7, the reactant on the inner surface of the dielectric tube 7 can be removed by the brush 13. .

Seventh Embodiment Next, a seventh embodiment of the present invention will be described with reference to FIG.

  The seventh embodiment shown in FIG. 8 differs only in that a monitor element 14 for monitoring the amount of ultraviolet light in the dielectric tube 7 is arranged in the dielectric tube 7, and the other configuration is shown in FIG. This is substantially the same as the sixth embodiment shown.

  In FIG. 8, the same parts as those of the sixth embodiment shown in FIG.

  As shown in FIG. 8, the arc tube 10 having a double glass tube structure is formed in a cylindrical shape and is disposed so as to surround the entire outer periphery of the dielectric tube 7. The dielectric tube 7 can be irradiated uniformly. Further, a cylindrical ultraviolet reflector 11 that covers the arc tube 10 is provided on the outer side of the arc tube 10 having a double glass tube structure, and a brush 13 is provided in the dielectric tube 7.

  Further, a monitor element 14 for monitoring the amount of ultraviolet light in the dielectric tube 7 is disposed in the dielectric tube 7, and the light amount of the arc tube 10 is controlled by the control unit 10 a based on the amount of ultraviolet light detected by the monitor element. be able to.

Eighth Embodiment Next, an eighth embodiment of the present invention will be described with reference to FIG.

  The eighth embodiment shown in FIG. 9 is different only in that a water leakage sensor is provided outside the dielectric tube 7, and the other configuration is substantially the same as that of the seventh embodiment shown in FIG. is there.

  In FIG. 9, the same parts as those of the seventh embodiment shown in FIG.

  As shown in FIG. 9, the arc tube 10 having a double glass tube structure is formed in a cylindrical shape and is disposed so as to surround the entire outer periphery of the dielectric tube 7. The dielectric tube 7 can be irradiated uniformly. Further, a cylindrical ultraviolet reflector 11 covering the arc tube 10 is provided on the outer side of the arc tube 10 having a double glass tube structure, and a brush 13 is provided in the dielectric tube 7.

  Further, a monitor element 14 for monitoring the amount of ultraviolet light in the dielectric tube 7 is disposed in the dielectric tube 7, and the light amount of the arc tube 10 is controlled by the control unit 10 a based on the amount of ultraviolet light detected by the monitor element. be able to.

  In FIG. 9, the ultraviolet reflector 11 has a cylindrical shape and covers the outer periphery of the arc tube 10 from the outside. A pair of end plates 11a and 11a are provided at both ends of the ultraviolet reflector 11, and the ultraviolet reflector 11 and the pair of end plates 11a and 11a form a sealed space surrounding the dielectric tube 7 from the outside. .

  Further, in the ultraviolet reflector 11, a water leakage sensor 15 is provided for detecting water leakage that leaks outward due to breakage of the dielectric tube 7 or leakage of the joint.

Schematic which shows the water treatment system in which the ultraviolet disinfection apparatus by this invention was integrated. The figure which shows 1st Embodiment of the ultraviolet disinfection apparatus by this invention. The figure which shows 2nd Embodiment of the ultraviolet disinfection apparatus by this invention. The figure which shows 3rd Embodiment of the ultraviolet disinfection apparatus by this invention. The figure which shows 4th Embodiment of the ultraviolet-ray disinfection apparatus by this invention. The figure which shows 5th Embodiment of the ultraviolet disinfection apparatus by this invention. The figure which shows 6th Embodiment of the ultraviolet-ray disinfection apparatus by this invention. The figure which shows 7th Embodiment of the ultraviolet-ray disinfection apparatus by this invention. The figure which shows 8th Embodiment of the ultraviolet-ray disinfection apparatus by this invention.

Explanation of symbols

4 UV disinfection device 6 UV light source 7 Dielectric tube 9 UV light 10 Arc tube 10a Control unit 11 UV reflector 12 UV reflection film 13 Brush 14 Monitor 15 Water leakage sensor

Claims (8)

A dielectric tube capable of transmitting ultraviolet light and into which treated water flows;
An ultraviolet light source disposed outside the dielectric tube;
An ultraviolet disinfection apparatus characterized by disinfecting treated water in a dielectric tube with ultraviolet light from an ultraviolet light source.   2. The ultraviolet disinfection apparatus according to claim 1, wherein the ultraviolet light source comprises an arc tube having a double glass tube structure.   An ultraviolet reflector that covers the ultraviolet light source and guides the ultraviolet light from the ultraviolet light source to the dielectric tube and prevents leakage of the ultraviolet light to the outside is further provided outside the ultraviolet light source. Item 3. The ultraviolet disinfection device according to any one of Items 1 and 2.   3. An ultraviolet reflecting film for guiding ultraviolet light from the arc tube to the dielectric tube and preventing leakage of the ultraviolet light to the outside is formed on the outer surface of the arc tube having a double glass tube structure. The ultraviolet disinfection device described.   The ultraviolet light disinfection device according to any one of claims 1 to 4, wherein the ultraviolet light source includes a plurality of light source units, and the number of lighting of these light source units is controlled by a control unit.   6. The ultraviolet disinfection device according to claim 1, wherein a brush for cleaning the inner surface of the dielectric tube is disposed in the dielectric tube.   7. The ultraviolet disinfection device according to claim 1, wherein a monitor element for monitoring the amount of ultraviolet light in the ultraviolet tube is arranged in the dielectric tube.   The ultraviolet disinfection device according to any one of claims 1 to 7, wherein a water leakage sensor that detects water leakage from the inside of the dielectric tube is provided outside the dielectric tube.

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