JP2008068203A - Ultraviolet sterilization system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet sterilization system which can surely sterilize an inflow liquid by measuring and monitoring ultraviolet irradiation. <P>SOLUTION: The ultraviolet sterilization system 11 comprises an inflow tank 50 into which secondary treated water 1f separated in a final settling basin 6 in a sewage treatment system 100 flows, an ultraviolet light source 21 installed in the secondary treated water 1f in the inflow tank 50 for sterilizing the secondary treated water 1f by irradiating ultraviolet light 13 to it, and an ultraviolet measurement device 22 for measuring the ultraviolet irradiation of the ultraviolet light source 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ultraviolet disinfection system for disinfecting an influent.

  Conventionally, chemicals such as ozone and chlorine have been used to sterilize, disinfect, decolorize water and sewage, deodorize and decolorize industrial water, bleach bleach pulp, and sterilize medical equipment.

  However, in conventional disinfection devices in water and sewage systems, a stirrer such as a retention tank or a spray pump is a necessity in order to dissolve ozone and chemicals uniformly in the supernatant liquid separated in the final sedimentation basin. In addition, changes in water quality and amount of water cannot be immediately handled, and the upper limit of the processing capacity of the conventional disinfection device may be exceeded. However, if this UV disinfection device is applied to water and sewage, the UV light source will be installed in a place where it cannot be seen, making it difficult to determine when the light source is replaced and whether the intensity of the generated UV light is appropriate. There was a case.

  The present invention has been made in consideration of such points, and can be sterilized by ultraviolet rays that do not require a stirring device, and the amount of ultraviolet rays to be irradiated is measured and monitored. An object of the present invention is to provide an ultraviolet disinfection system that can surely disinfect a liquid (especially a supernatant liquid).

  The present invention relates to an inflow tank into which an inflow liquid flows, an ultraviolet light source provided in the inflow tank to disinfect the inflow liquid by irradiating the inflow liquid with ultraviolet light, and an ultraviolet irradiation amount from the ultraviolet light source is measured. And an ultraviolet ray disinfection system characterized by comprising an ultraviolet ray measuring device.

  The present invention is the ultraviolet disinfection system characterized in that the ultraviolet ray measuring apparatus has an ultraviolet monitor.

  The present invention is the ultraviolet disinfection system characterized in that the ultraviolet monitor is disposed in a position adjacent to the ultraviolet light source in the influent.

  The present invention is the ultraviolet disinfection system characterized in that the ultraviolet monitor is disposed outside the influent.

  In the present invention, the ultraviolet ray measuring device includes at least two ultraviolet ray monitors. One ultraviolet ray monitor is disposed in a position adjacent to the ultraviolet light source in the inflowing liquid, and the other ultraviolet ray monitor is disposed outside the inflowing liquid. It is an ultraviolet disinfection system characterized by being arranged.

  According to the present invention, an ultraviolet ray measuring apparatus includes an optical fiber that transmits ultraviolet light emitted from an ultraviolet light source, and an optical / electrical signal converter that is connected to the optical fiber and converts ultraviolet light into an electric signal. Disinfection system.

  In the present invention, the ultraviolet ray measuring apparatus is connected to the ultraviolet light source side end portion of the optical fiber, converts the ultraviolet ray irradiated by the ultraviolet light source into visible light, and further converts a phosphor that guides the converted visible light to the optical fiber, It is the ultraviolet disinfection system characterized by having.

  In the present invention, the ultraviolet ray measuring apparatus includes a reflecting mirror that reflects the ultraviolet ray irradiated from the ultraviolet light source, and a hollow rod or a flexible hollow pipe whose inner surface is mirror-finished while reflecting and transmitting the ultraviolet ray reflected by the reflecting mirror, An ultraviolet disinfection system comprising an optical / electrical signal converter which is disposed inside the hollow rod or the flexible hollow pipe and converts ultraviolet light into an electric signal.

  The present invention is characterized by further comprising an ultraviolet light source lifetime determining means that is connected to the ultraviolet ray measuring device and determines the lifetime of the ultraviolet light source based on the ultraviolet ray irradiation amount from the ultraviolet light source measured by the ultraviolet ray measuring device. It is an ultraviolet disinfection system.

  The present invention relates to an ultraviolet ray irradiation amount determining means connected to an ultraviolet ray measuring device and for determining whether the ultraviolet ray irradiation amount irradiated from the ultraviolet light source is excessive or insufficient based on the ultraviolet ray irradiation amount from the ultraviolet light source measured by the ultraviolet ray measuring device. Is further provided with an ultraviolet disinfection system.

  The present invention is the ultraviolet disinfection system characterized in that the ultraviolet ray measuring device is covered with a protective cover made of an ultraviolet transparent solid material.

  The present invention is an ultraviolet disinfection system characterized in that means for automatically or manually adjusting the inflow amount of the inflowing liquid is provided at a portion where the inflowing liquid flows into the inflow tank.

  According to the present invention, it is possible to replace and adjust the ultraviolet light source at an appropriate time by monitoring and measuring the ultraviolet light emitted from the ultraviolet light source with an ultraviolet monitor, thereby reliably disinfecting the secondary treated water. We can provide a UV disinfection system that can do this.

First Embodiment Hereinafter, an embodiment of an ultraviolet disinfection system 11 according to the present invention will be described with reference to the drawings. Here, FIG. 1 to FIG. 3 are diagrams showing a first embodiment of the present invention.

  First, the entire sewage treatment system 100 will be described with reference to FIG.

  As shown in FIG. 1, a sewage treatment system 100 includes a sewage adjustment pond 2 into which sewage 1a flows, a first settling basin 3 connected to the sewage adjustment pond 2 and into which sewage 1b flows from the sewage adjustment pond 2, and an initial settling pond. 3, the aeration tank 5 into which the primary treated water 1c from the first sedimentation tank 3 flows, the final sedimentation tank 6 to which the primary treated water 1d from the aeration tank 5 flows in, and the final sedimentation tank 6 And a storage basin 8 into which secondary treated water 1e from the final sedimentation basin 6 flows in, and an ultraviolet disinfection system 11 connected to the storage pond 8 and into which secondary treated water 1f from the storage pond 8 flows in. . In addition, the treated water from the ultraviolet disinfection system 11 is discharged outside as 1 g of secondary treated water.

  In addition, surplus sludge 4 c from the first sedimentation tank 3 is sent to the concentration tank 9. A part of the activated sludge from the final sedimentation basin 6 is returned to the aeration tank 5 as return sludge 4a, and the remaining activated sludge is sent to the concentration tank 9 as surplus sludge 4b. The sludge concentrated in the concentration tank 9 is dehydrated in the dehydrator 10, and then the dehydrated sludge is incinerated in an incinerator.

  Next, the ultraviolet disinfection system 11 according to the present invention incorporated in the sewage treatment system 100 will be described with reference to FIG.

  As shown in FIG. 3, the ultraviolet disinfection system 11 includes an inflow tank 50 into which the secondary treated water 1f separated by the final sedimentation basin 6 in the sewage treatment system 100 and stored in the storage pond 8 flows, and the inflow tank 50. The ultraviolet light source 21 provided in the secondary treated water 1f for disinfecting the secondary treated water 1f by irradiating the secondary treated water 1f with the ultraviolet light 13 and the ultraviolet ray irradiation amount of the ultraviolet light source 21 are detected. An ultraviolet monitor 12 and a measuring unit 25 that measures ultraviolet 13 detected by the ultraviolet monitor 12 are provided. The ultraviolet monitor 12 and the measuring unit 25 constitute an ultraviolet measuring device 22.

  Among these, the ultraviolet monitor 12 is disposed in the secondary treated water 1 f in the inflow tank 50 and at a position adjacent to the ultraviolet light source 21.

  As the ultraviolet light source 21 that generates the ultraviolet light 13, a mercury lamp, an excimer lamp, an LED, or the like can be used. For example, when a low-pressure mercury lamp is used as the ultraviolet light source 21, the ultraviolet light 13 having wavelengths of 254 nm and 185 nm can be generated. When an excimer lamp is used as the ultraviolet light source 21, xenon, krypton, and argon are used as an excitation medium. Can generate ultraviolet rays 13 having wavelengths of 172 nm, 146 nm, and 126 nm, respectively.

  As shown in FIG. 2, a communication path 30 is provided between the storage pond 8 and the ultraviolet disinfection system 11, and the flow rate of the secondary treated water 1 f from the storage pond 8 is adjusted in the communication path 30. A power device 31 such as a pump is provided. In addition, you may use the movable valve 32, the movable dam 33, etc. instead of the power devices 31, such as a pump.

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

  By using the sewage treatment system 100 shown in FIGS. 1 to 3, the sewage 1a discharged from a home or factory can be purified to water quality that can be discharged into a river or the sea.

  That is, as shown in FIGS. 1 to 3, first, sewage 1a discharged from a home or factory flows into the sewage adjustment basin 2, and then sewage 1b flows from the sewage adjustment pond 2 into the first settling basin 3. Here, the sewage 1b is separated into the primary treated water 1c and the excess sludge 4b which is a precipitate. Next, the primary treated water 1c flows into the aeration tank 5, where it is treated with organisms, chemicals, and the like. Next, the primary treated water 1d from the aeration tank 5 flows into the final sedimentation basin 6, where the primary treated water 1d is separated into the secondary treated water 1e and the activated sludges 4a and 4b. Next, the secondary treated water 1 e from the final sedimentation basin 6 flows into the storage basin 8. Next, the secondary treated water 1f from the storage pond 8 flows into the ultraviolet disinfection system 11, where the secondary treated water 1f is sterilized by the ultraviolet light source 21 and then discharged as 1 g of discharged water to the river or the sea. The

  As shown in FIGS. 1 to 3, the excess sludge 4 c first separated in the settling basin 3 flows into the concentration tank 9 and is concentrated in the concentration tank 9. A part of the activated sludge separated in the final sedimentation basin 6 is returned to the aeration tank 5 as return sludge 4a, and again subjected to treatment of organisms, chemicals, etc., and the remaining activated sludge is concentrated as excess sludge 4b. 9 to be concentrated. Then, the excess sludge 4b, 4c concentrated in the concentration tank 9 is further dehydrated by the dehydrator 10, and then incinerated or regenerated as fertilizer.

  Next, the operation of the ultraviolet disinfection system 11 will be described in detail with reference to FIGS.

  In the ultraviolet disinfection system 11 shown in FIGS. 1 to 3, the ultraviolet light source 21 irradiates the secondary treated water 1f with the ultraviolet rays 13, and thereby the secondary treated water 1f is disinfected. During this time, the ultraviolet light 13 emitted from the ultraviolet light source 21 is detected by the ultraviolet monitor 12 and measured by the measuring unit 25. Based on the measurement result, the operating status of the ultraviolet light source 21 is grasped. For this reason, it is possible to grasp when the ultraviolet light source 21 is approaching its lifetime or when the amount of the ultraviolet light 13 irradiated by the ultraviolet light source 21 is insufficient. Therefore, the ultraviolet light source 21 can be replaced and adjusted quickly.

  Further, in the flow passage 30 where the secondary treated water 1f flows into the inflow tank 50, a power device 31 such as a pump for automatically or manually adjusting the inflow amount of the secondary treated water 1f, a movable valve 32 or a movable weir 33, etc. By providing, the inflow amount of the secondary treated water 1f into the inflow tank 50 can be adjusted. For this reason, the inflow amount of the secondary treated water 1f can be adjusted according to the amount of ultraviolet irradiation from the ultraviolet light source 21 so that processing can be performed within the processing capacity of the ultraviolet disinfection system 11. Therefore, the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not short, and the secondary treated water 1f can be surely sterilized by the ultraviolet rays 13.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment shown in FIG. 4 is different from the first embodiment shown in FIGS. 1 to 3 in that the arrangement structure of the ultraviolet light source 21 and the ultraviolet monitors 12a and 12b is different. .

  In the second embodiment shown in FIG. 4, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the ultraviolet disinfection system 11 is installed in the inflow tank 50 having an inflow tank 50 having an inflow port 50a into which the secondary treated water 1f flows in and an outflow port 50b into which the treatment liquid 1g flows out. An ultraviolet light source 21, a pair of ultraviolet monitors 12 a and 12 b that detect the amount of ultraviolet irradiation from the ultraviolet light source 21, and a measuring unit 25 that measures the ultraviolet light 13 detected by the pair of ultraviolet monitors 12 a and 12 b are provided. Among these, in the inflow tank 50, a cylindrical transparent cylindrical body 50c made of a transparent material penetrating the inflow tank 50 is provided, and the ultraviolet light source 21 is disposed in the atmosphere in the transparent cylindrical body 50c, and the transparent cylinder The ultraviolet ray 13 is irradiated to the secondary treated water 1f in the inflow tank 50 through the body 50c.

  One ultraviolet monitor 12a is disposed near the lower portion of the ultraviolet light source 21 disposed in the transparent cylindrical body 50c, and the other ultraviolet monitor 12b is disposed outside the opening 50e provided in the wall surface 50d of the inflow tank 50. Yes.

  As shown in FIG. 4, the ultraviolet monitor 12 a is disposed at a position adjacent to the ultraviolet light source 21, that is, near the lower portion of the ultraviolet light source 21. Thus, the ultraviolet ray 13 irradiated from the ultraviolet light source 21 can be directly detected by the ultraviolet monitor 12a without being affected by external factors such as the secondary treated water 1f and gas. For this reason, since the quantity of the ultraviolet rays 13 irradiated from the ultraviolet light source 21 can be detected more accurately, when the ultraviolet light source 21 is approaching its lifetime, the amount of the ultraviolet rays 13 irradiated by the ultraviolet light source 21 is insufficient. Etc. can be grasped. Accordingly, the ultraviolet light source 21 can be exchanged and adjusted quickly and quickly, and the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not insufficient, and the secondary treated water 1f Can be sterilized reliably.

  Further, the ultraviolet monitor 12b is disposed outside the secondary treated water 1f, so that the ultraviolet light 13 irradiated from the ultraviolet light source 21 can be detected by the ultraviolet monitor 12b through the secondary treated water 1f. Therefore, by comparing the irradiation amount of the ultraviolet ray 13 detected by the ultraviolet monitor 12a and measured by the measuring unit 25 with the irradiation amount of the ultraviolet ray 13 detected by the ultraviolet monitor 12b and measured by the measuring unit 25, It is possible to grasp the water quality change of the secondary treated water 1f.

  Furthermore, since the ultraviolet light source 21 is disposed in the atmosphere inside the transparent cylindrical body 50c and is not disposed in water, it is possible to prevent the ultraviolet light source 21 from being contaminated by the secondary treated water 1f. The frequency with which the light source 21 fails can also be reduced.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment shown in FIG. 5 is different in the arrangement structure of the ultraviolet light sources 21a and 21b and the ultraviolet monitors 12a and 12b of the ultraviolet disinfection system 11, and the others are the first implementation shown in FIGS. The form is substantially the same.

  In the second embodiment shown in FIG. 5, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the ultraviolet disinfection system 11 includes an inflow tank 50 into which the secondary treated water 1 f flows and a pair of ultraviolet light sources arranged in the vertical direction in the secondary treated water 1 f in the inflow tank 50. 21a and 21b. Here, the inflow tank 50 has the form of the inflow path into which the secondary treated water 1f flows.

  Further, one ultraviolet monitor 12a is provided on the side surfaces of the ultraviolet light sources 21a and 21b in the secondary treated water 1f, and the other ultraviolet monitor 12b is provided above the secondary treated water 1f in the inflow tank 50. ing.

  As shown in FIG. 5, since the ultraviolet monitor 12a is provided on the side surfaces of the ultraviolet light sources 21a and 21b, the ultraviolet light 13 emitted from the ultraviolet light source 21a is directly applied by the ultraviolet monitor 12a disposed on the right side of the side surface of the ultraviolet light source 21a. The ultraviolet ray 13 emitted from the ultraviolet light source 21b can be directly detected by the ultraviolet monitor 12a disposed on the right side of the side surface of the ultraviolet light source 21b. Thus, since the amount of the ultraviolet rays 13 irradiated from the ultraviolet light sources 21a and 21b can be detected more directly, when the ultraviolet light sources 21a and 21b are approaching their lifetimes, the ultraviolet rays 13 irradiated by the ultraviolet light sources 21a and 21b are emitted. It is possible to more accurately grasp the case where the amount is insufficient. Therefore, the ultraviolet light sources 21a and 21b can be exchanged and adjusted quickly, and the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not short. Can be sterilized reliably.

  Further, the ultraviolet monitor 12b is arranged outside the secondary treated water 1f, so that the ultraviolet light 13a irradiated from the upper ultraviolet light source 21a among the ultraviolet light sources 21a and 21b is passed through the secondary treated water 1f. Can be detected. For this reason, the amount of the ultraviolet rays 13 detected by the ultraviolet monitor 12a of the ultraviolet light sources 21a and 21b and measured by the measuring unit 25 is compared with the amount of the ultraviolet rays 13 detected by the ultraviolet monitor 12b and measured by the measuring unit 25. By doing so, the water quality change of the secondary treated water 1f can also be grasped.

  Furthermore, since the ultraviolet light sources 21a and 21b are disposed in the water, the ultraviolet ray 13 can be efficiently irradiated to the secondary treated water 1f, and the secondary treated water 1f can be sterilized more reliably.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment shown in FIG. 6, an ultraviolet light source lifetime determination unit 41 is connected to the ultraviolet monitor 12, and the ultraviolet light source 21 detected by the ultraviolet monitor 12 by the ultraviolet light source lifetime determination unit 41 and measured by the measuring unit 25. The lifetime of the ultraviolet light source 21 is determined on the basis of the amount of ultraviolet irradiation from the other, and the others are substantially the same as those of the first embodiment shown in FIGS.

  In the fourth embodiment shown in FIG. 6, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 6, ultraviolet rays 13 emitted from the ultraviolet light source 21 are detected by the ultraviolet monitor 12 and measured by the measuring unit 25. Then, based on the measured result, the ultraviolet light source lifetime determining means 41 automatically determines whether the ultraviolet light source 21 has reached the lifetime and displays the result. For this reason, when it is determined that the ultraviolet light source 21 is approaching its life and cannot be used continuously, the ultraviolet light source 21 can be replaced immediately. Therefore, the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not insufficient, and the secondary treated water 1f can be surely sterilized.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment shown in FIG. 7, an ultraviolet ray irradiation amount determining means 42 is connected to the ultraviolet ray monitor 12, and the ultraviolet light source detected by the ultraviolet ray monitor 12 and measured by the measuring unit 25 by the ultraviolet ray irradiation amount determining means 42. Based on the ultraviolet irradiation amount from the ultraviolet light source 21, it is determined whether the ultraviolet irradiation amount irradiated from the ultraviolet light source 21 is excessive or insufficient, and the others are substantially the same as those of the first embodiment shown in FIGS. .

  In the fifth embodiment shown in FIG. 7, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 7, the ultraviolet rays 13 emitted from the ultraviolet light source 21 are detected by the ultraviolet monitor 12 and measured by the measuring unit 25. Based on the measured result, the ultraviolet irradiation amount determining means 42 automatically determines whether the ultraviolet irradiation amount irradiated from the ultraviolet light source 21 is excessive or insufficient, and displays the result. For this reason, when it determines with the ultraviolet irradiation amount of the ultraviolet light source 21 not being an appropriate amount, the ultraviolet irradiation amount irradiated from the ultraviolet light source 21 can be adjusted to an appropriate amount. Therefore, the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is neither too much nor too little, and the secondary treated water 1f can be sterilized efficiently and reliably.

Sixth Embodiment Next, a sixth embodiment of the present invention will be described with reference to FIG. In the sixth embodiment shown in FIG. 8, instead of the ultraviolet monitor 12, the optical fiber 14 that transmits the ultraviolet light 13 emitted from the ultraviolet light source 21 and the phosphor connected to the end of the optical fiber 14 on the side of the ultraviolet light source 21. 19 and an ultraviolet ray measuring device 22 which is connected to the optical fiber 14 and includes an optical / electrical signal converter 15 which converts the ultraviolet ray 13 into an electric signal, and the others are the first ones shown in FIGS. This is substantially the same as the embodiment.

  In the sixth embodiment shown in FIG. 8, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 8, the ultraviolet light 13 irradiated from the ultraviolet light source 21 is first converted into visible light by the phosphor 19, and this visible light is transmitted by the optical fiber 14. Visible light transmitted by the optical fiber 14 is guided to an optical / electrical signal converter 15, and is converted into an electric signal by the optical / electrical signal converter 15. Thereafter, the electrical signal converted by the optical / electrical signal converter 15 is sent to the measuring unit 25 to determine the ultraviolet ray irradiation amount.

  According to the present embodiment, the visible light obtained from the ultraviolet light 13 irradiated from the ultraviolet light source 21 is converted into an electrical signal by the optical / electrical signal converter 15, and then the ultraviolet irradiation amount is obtained by the measuring unit 25. The irradiation amount of the ultraviolet rays 13 irradiated by the ultraviolet light source 21 can be measured without being affected by electrical noise such as high frequency generated when the ultraviolet light source 21 generates the ultraviolet rays 13.

  In addition, the phosphor 19 converts the ultraviolet ray 13 irradiated by the ultraviolet light source 21 into visible light, and guides the converted visible light to the optical fiber 14, so that the inside of the optical fiber 14 can be transmitted more efficiently than the ultraviolet ray 13. Visible light can be used, and transmission by the optical fiber 14 can be performed efficiently.

  Thus, since the amount of the ultraviolet light 13 irradiated from the ultraviolet light source 21 is measured more accurately, when the ultraviolet light source 21 is approaching its life, the amount of the ultraviolet light 13 irradiated by the ultraviolet light source 21 is insufficient. It is possible to grasp when it is. Therefore, the ultraviolet light source 21 can be replaced and adjusted quickly, and the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not insufficient, and the secondary treated water 1f is surely obtained. Can be disinfected.

Seventh Embodiment Next, a seventh embodiment of the present invention will be described with reference to FIGS. In the seventh embodiment shown in FIG. 9 and FIG. 10, instead of the ultraviolet monitor 12, an ultraviolet transparent quartz glass tube 61, a hollow rod 17 connected to the quartz glass tube 61 and having an inner surface serving as a mirror surface 60, , An ultraviolet measuring device 22 comprising an optical / electrical signal converter 15 arranged inside the hollow rod 17 is provided, and the others are substantially the same as those of the first embodiment shown in FIGS. is there.

  In the seventh embodiment shown in FIGS. 9 and 10, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, as shown in FIGS. 9 and 10, the hollow rod 17 whose inner surface is processed to form the mirror surface 60 is connected to the other end opening of the quartz glass tube 61 whose one end is closed. A quartz glass window 62 is provided on the quartz glass tube 61 side in the hollow rod 17, and an optical / electrical signal converter 15 is provided on the closed side in the hollow rod 17. Further, a reflecting mirror 16 is installed in the quartz glass tube 61, and a measuring unit 25 is connected to the optical / electrical signal converter 15 in the hollow rod 17.

  As shown in FIGS. 9 and 10, the ultraviolet rays 13 emitted from the ultraviolet light source 21 are incident on the quartz glass tube 61, and the ultraviolet rays 13 incident on the quartz glass tube 61 are reflected by the reflection mirror 16. The ultraviolet rays 13 reflected by the reflection mirror 16 in the quartz glass tube 61 enter the hollow rod 17 through the ultraviolet window 62, and the ultraviolet rays 13 incident on the hollow rod 17 are reflected and transmitted by the mirror surface 60 in the hollow rod 17, The light / electrical signal converter 15 disposed inside the hollow rod 17 is guided to the electric signal by the optical / electrical signal converter 15. Thereafter, the electrical signal from the optical / electrical signal converter 15 is sent to the measuring unit 25 to measure the ultraviolet irradiation amount.

  According to the present embodiment, the ultraviolet light 13 that has entered the quartz glass tube 61 is guided to the optical / electrical signal converter 15 by the mirror surface 60 and is converted into an electrical signal by the optical / electrical signal converter 15 to be measured by the measuring unit 25. Therefore, the amount of the ultraviolet rays 13 irradiated by the ultraviolet light source 21 can be measured without being affected by electrical noise such as a high frequency generated when the ultraviolet light source 21 generates the ultraviolet rays 13.

  For this reason, since the quantity of the ultraviolet rays 13 irradiated from the ultraviolet light source 21 can be measured more accurately, when the ultraviolet light source 21 is approaching its life, the amount of the ultraviolet rays 13 irradiated by the ultraviolet light source 21 is insufficient. Etc. can be grasped. Therefore, the ultraviolet light source 21 can be replaced and adjusted quickly, and the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not insufficient, and the secondary treated water 1f is surely obtained. Can be disinfected.

  Next, a modification of the present embodiment will be described in detail with reference to FIG.

  In the modification shown in FIG. 11, a flexible hollow pipe 18 having a mirror surface 60 on the inner surface is used instead of the hollow rod 17 having a mirror surface 60 on the inner surface. Since the flexible hollow pipe 18 can be bent, the flexible hollow pipe 18 can be arranged in the desired space by bending the flexible hollow pipe 18 in accordance with the shape of the desired space, thereby irradiating the ultraviolet rays 13 in the desired space. Useful when measuring quantities.

Eighth Embodiment Next, an eighth embodiment of the present invention will be described with reference to FIG. In the eighth embodiment shown in FIG. 12, the ultraviolet monitor 12 is covered with a protective cover 20 made of a solid material that is transparent to ultraviolet rays, and the others are the first embodiment shown in FIGS. The form is substantially the same.

  In the eighth embodiment shown in FIG. 12, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 12, the light receiving portion of the ultraviolet monitor 12 is covered with a protective cover 20 made of an ultraviolet light transmissive solid material. By covering the ultraviolet monitor 12 with the protective cover 20 as described above, it is possible to prevent the ultraviolet monitor 12 from being contaminated. For this reason, the amount of the ultraviolet rays 13 irradiated from the ultraviolet light source 21 can be accurately measured. When the ultraviolet light source 21 is approaching its life, the amount of the ultraviolet rays 13 irradiated by the ultraviolet light source 21 is insufficient. I can grasp it. Therefore, the ultraviolet light source 21 can be replaced and adjusted quickly, and the amount of the ultraviolet rays 13 irradiated to the secondary treated water 1f flowing into the inflow tank 50 is not insufficient, and the secondary treated water 1f is surely obtained. Can be disinfected.

  Here, as the ultraviolet transparent solid material used for the protective cover 20, quartz glass, fluorine resin, or the like that transmits the ultraviolet rays 13 can be used. Moreover, in order to prevent dirt from adhering to the protective cover 20, the surface of the protective cover 20 may be further coated with a photocatalyst or a fluorine resin. Furthermore, in order to prevent dirt from adhering to the protective cover 20, means for cleaning the protective cover 20 manually or automatically can be provided in the ultraviolet monitor 12.

  In the above description, each of the first to eleventh embodiments has been described individually. However, the first to eleventh embodiments may be arbitrarily combined or all may be combined.

  In each of the above embodiments, the ultraviolet disinfection system 11 of the present invention has been described as being used in the sewage treatment system 100. However, the present invention is not limited thereto, and the ultraviolet disinfection system 11 of the present invention is a water purification treatment system. It can also be used inside.

The block diagram which shows the outline of the sewage treatment system by this invention. BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows 1st Embodiment of the outline of the storage pond and ultraviolet disinfection system by this invention, and an ultraviolet disinfection system. BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows 1st Embodiment of the ultraviolet disinfection system by this invention. The block diagram which shows 2nd Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 3rd Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 4th Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 5th Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 6th Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 7th Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 7th Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 7th Embodiment of the ultraviolet-ray disinfection system by this invention. The block diagram which shows 8th Embodiment of the ultraviolet-ray disinfection system by this invention.

Explanation of symbols

1a, 1b Sewage 1c, 1d Primary treated water 1e, 1f Secondary treated water 1g Effluent water 2 Sewage adjustment pond 3 First sedimentation basin 4 Surplus sludge 5 Aeration tank 6 Final sedimentation basin 8 Storage pond 9 Concentration tank 10 Dehydrator 11 Ultraviolet disinfection System 12, 12a, 12b UV monitor 13 UV 14 Optical fiber 15 Optical / electrical signal converter 16 Reflection mirror 17 Hollow rod 18 Flexible hollow pipe 19 Phosphor 20 Protective cover 21, 21a, 21b UV light source 22 UV measuring device 25 Measuring unit 30 Connection path 31 Power device 32 Movable valve 33 Movable weir 41 Ultraviolet light source lifetime determination means 42 Ultraviolet irradiation amount determination means 50 Inflow tank 60 Mirror surface 61 Quartz glass tube 62 Quartz glass window 100 Sewage treatment system

Claims (12)

An inflow tank into which the influent flows,
An ultraviolet light source that is provided in the inflow tank and disinfects the inflow liquid by irradiating the inflow liquid with ultraviolet rays;
An ultraviolet ray measuring device for measuring an ultraviolet ray irradiation amount from the ultraviolet light source;
An ultraviolet disinfection system characterized by comprising:   The ultraviolet disinfection system according to claim 1, wherein the ultraviolet measurement device includes an ultraviolet monitor.   3. The ultraviolet disinfection system according to claim 2, wherein the ultraviolet monitor is disposed in a position adjacent to the ultraviolet light source in the inflowing liquid.   The ultraviolet disinfection system according to claim 2, wherein the ultraviolet monitor is disposed outside the influent.   The ultraviolet ray measuring device is composed of at least two ultraviolet ray monitors, one ultraviolet ray monitor being disposed in the inflowing liquid and at a position adjacent to the ultraviolet light source, and the other ultraviolet ray monitor being disposed outside the inflowing liquid. The ultraviolet disinfection system according to claim 2.   2. The ultraviolet ray measuring apparatus includes an optical fiber that transmits ultraviolet rays emitted from an ultraviolet light source, and an optical / electrical signal converter that is connected to the optical fibers and converts ultraviolet rays into an electrical signal. UV disinfection system.   The ultraviolet ray measuring apparatus further includes a phosphor connected to the end of the optical fiber on the side of the ultraviolet light source and converting the ultraviolet ray irradiated by the ultraviolet light source into visible light and guiding the converted visible light to the optical fiber. The ultraviolet disinfection system according to claim 6.   The ultraviolet ray measuring device includes a reflection mirror that reflects ultraviolet rays emitted from an ultraviolet light source, a reflection reflecting and transmitting ultraviolet rays reflected by the reflection mirror, and a hollow rod or flexible hollow pipe whose inner surface is mirror-finished, and the hollow rod or 2. The ultraviolet disinfection system according to claim 1, further comprising an optical / electrical signal converter which is disposed inside the flexible hollow pipe and converts ultraviolet light into an electronic signal.   An ultraviolet light source lifetime determination means for determining the lifetime of the ultraviolet light source based on the amount of ultraviolet irradiation from the ultraviolet light source measured by the ultraviolet measurement device and connected to the ultraviolet measurement device. The ultraviolet disinfection system according to any one of 1 to 9.   An ultraviolet irradiation amount determining means connected to the ultraviolet ray measuring device and for determining whether the ultraviolet ray irradiation amount irradiated from the ultraviolet light source is excessive or insufficient based on the ultraviolet ray irradiation amount from the ultraviolet light source measured by the ultraviolet ray measuring device is further provided. The ultraviolet disinfection system according to any one of claims 1 to 9, wherein   The ultraviolet ray disinfection system according to any one of claims 1 to 11, wherein the ultraviolet ray measurement device is covered with a protective cover made of an ultraviolet ray transmissive solid material.   The ultraviolet disinfection system according to any one of claims 1 to 14, wherein means for automatically or manually adjusting an inflow amount of the inflow liquid is provided at a portion where the inflow liquid flows into the inflow tank. .

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