WO2015037260A1 - 紫外線照射装置 - Google Patents
紫外線照射装置 Download PDFInfo
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- WO2015037260A1 WO2015037260A1 PCT/JP2014/056665 JP2014056665W WO2015037260A1 WO 2015037260 A1 WO2015037260 A1 WO 2015037260A1 JP 2014056665 W JP2014056665 W JP 2014056665W WO 2015037260 A1 WO2015037260 A1 WO 2015037260A1
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- ultraviolet
- unit
- irradiation
- transmittance
- intensity
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- 238000009281 ultraviolet germicidal irradiation Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 230000006866 deterioration Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000002834 transmittance Methods 0.000 claims description 82
- 238000005259 measurement Methods 0.000 claims description 25
- 238000004364 calculation method Methods 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract 2
- 238000012544 monitoring process Methods 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 22
- 230000001681 protective effect Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 12
- 230000007423 decrease Effects 0.000 description 9
- 238000004659 sterilization and disinfection Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000372132 Hydrometridae Species 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
Images
Classifications
-
- 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
- C02F1/325—Irradiation devices or lamp constructions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3227—Units with two or more lamps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/326—Lamp control systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/008—Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4247—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources
Definitions
- Embodiments of the present invention relate to an ultraviolet irradiation device.
- the disinfection apparatus an example of the ultraviolet irradiation apparatus
- sterilization / disinfection / decoloration of tap water or groundwater in water and sewage systems It is possible to deodorize and decolorize industrial water, bleach pulp, etc., and adjust the output of the UV lamp to respond immediately to changes in water quality and quantity.
- the ultraviolet transmittance of the treated water is measured by a dedicated measuring device, Based on the measurement result, it is determined whether or not the intensity of the ultraviolet light irradiated from the ultraviolet lamp satisfies a specified value defined by the operational specifications of the ultraviolet irradiation apparatus.
- the ultraviolet irradiation device of the embodiment includes an irradiation unit, a measurement unit, a detection unit, a calculation unit, and a display unit.
- the irradiation unit irradiates treatment water to be treated with ultraviolet rays for treatment.
- a measurement part measures the ultraviolet-ray intensity
- a detection part detects that the irradiation part deteriorated according to the ultraviolet-ray intensity measured by the measurement part.
- the calculation unit calculates the ultraviolet transmittance of the treated water based on the ultraviolet intensity of the ultraviolet rays emitted from the irradiation unit and the ultraviolet intensity measured by the measurement unit according to a preset setting value.
- the display unit displays the detection result of the deterioration of the irradiation unit by the detection unit and the ultraviolet transmittance calculated by the calculation unit.
- FIG. 1 is a flow chart which shows the treatment process of the treated water in the drinking water treatment system concerning a 1st embodiment.
- FIG. 2 is an external view of the ultraviolet irradiation apparatus according to the first embodiment.
- FIG. 3 is a vertical cross-sectional view of a reaction tank provided in the ultraviolet irradiation apparatus according to the first embodiment.
- FIG. 4 is a block diagram illustrating a hardware configuration of the electronic ballast included in the ultraviolet irradiation device according to the first embodiment.
- FIG. 5 is a diagram showing the relationship between the UV monitor instruction value and the duty set value.
- FIG. 6 is a diagram showing the relationship between the UV monitor instruction value and the UV transmittance when the quality of the treated water passing through the reaction tank changes.
- FIG. 1 is a flow chart which shows the treatment process of the treated water in the drinking water treatment system concerning a 1st embodiment.
- FIG. 2 is an external view of the ultraviolet irradiation apparatus according to the first embodiment.
- FIG. 3 is a
- FIG. 7 is a diagram showing a calculation result of the ultraviolet transmittance according to the equation (2) using the ultraviolet monitor instruction value and the duty setting value.
- FIG. 8 is a vertical cross-sectional view of a reaction tank provided in the ultraviolet irradiation device according to the third embodiment.
- FIG. 9 is a diagram illustrating a calculation result of the ultraviolet transmittance when the ultraviolet monitor instruction value is reduced to 70% due to the deterioration of the irradiation unit of the ultraviolet irradiation device according to the third embodiment.
- FIG. 10 is a block diagram illustrating a hardware configuration of an electronic ballast included in the ultraviolet irradiation device according to the fourth embodiment.
- FIG. 1 is a flow chart which shows the treatment process of the treated water in the drinking water treatment system concerning a 1st embodiment.
- the water treatment system according to the present embodiment takes raw water (an example of treated water to be treated) from a river, a lake, groundwater, or the like (step S101).
- the water treatment system introduces the taken raw water into a coagulation sedimentation tank, and adds a coagulant to the coagulation / sedimentation tank (step S102).
- step S101 raw water
- step S102 adds a coagulant to the coagulation / sedimentation tank
- the water treatment system sends the supernatant water of the coagulation sedimentation tank to the activated carbon filtration tank to filter foreign substances (step S103). Furthermore, the water supply system sends filtered water to the ultraviolet irradiation device 1 (see FIG. 2) to irradiate ultraviolet rays (step S104), and sends UV disinfected water that has been irradiated with ultraviolet rays to a chlorine injection tank to inject chlorine. Later (step S105), water is distributed to ordinary households and business establishments.
- FIG. 2 is an external view of the ultraviolet irradiation apparatus according to the first embodiment.
- FIG. 3 is a vertical cross-sectional view of a reaction tank provided in the ultraviolet irradiation apparatus according to the first embodiment.
- FIG. 4 is a block diagram illustrating a hardware configuration of the electronic ballast included in the ultraviolet irradiation device according to the first embodiment.
- the ultraviolet irradiation device 1 irradiates treated water with ultraviolet rays for treatment, thereby performing germs, disinfection, inactivation, and the like of the treated water.
- the ultraviolet irradiation device 1 includes a reaction tank (treatment tank) 6 through which treated water passes, a water supply port 9, a drain port 11, a protective tube 7, an ultraviolet monitoring window 12, and a protective cover 14. It is equipped with.
- the reaction tank 6 passes treated water for performing germs, disinfection, inactivation and the like. Moreover, the reaction tank 6 has a water supply port for supplying (inflowing) treated water and a drain port for discharging (outflowing) treated water. The water supply port and the water discharge port are formed to face each other in the reaction tank 6. A water supply port 9 is connected to the water supply port of the reaction tank 6. A drain port 11 is connected to the drain port of the reaction tank 6. The treated water flows and passes in the direction from the water supply port (water supply port 9) toward the water discharge port (drainage port 11), that is, in the direction A in FIG. The horizontal direction perpendicular to the A direction is defined as the B direction.
- the protective tube 7 is formed of a member that can transmit ultraviolet rays, such as quartz glass.
- an ultraviolet lamp 8 that irradiates the treatment water passing from the water supply port toward the drain port is irradiated inside the protective tube 7.
- the ultraviolet lamp 8 is connected to wiring for supplying power to the ultraviolet lamp 8 from both ends, and is connected to an electronic ballast 13 for supplying power to the ultraviolet lamp 8 through the wiring.
- the protective tube 7 is provided inside the reaction tank 6 in a direction intersecting with the direction from the water supply port to the drain port.
- the ultraviolet irradiation device 1 includes two protective tubes 7 arranged side by side in the direction from the water supply port to the drain port (the direction in which the treated water passes), respectively, provided above and below the reaction tank 6. Yes.
- the ultraviolet lamp 8 and the protective tube 7 function as the irradiation unit 15.
- the ultraviolet ray monitoring window 12 is provided with an ultraviolet ray monitor 12a (an example of a measuring unit) that measures the ultraviolet ray intensity of ultraviolet rays that are irradiated from the ultraviolet lamp 8 and pass through the treated water.
- an ultraviolet ray monitor 12a an example of a measuring unit
- two ultraviolet monitoring windows 12 are provided one above the other with a protective tube 7 formed inside the reaction tank 6 interposed therebetween.
- the electronic ballast 13 includes a power supply unit 131 that can supply power to the ultraviolet lamp 8, a control unit 132 that controls the entire electronic ballast 13, and various information (for example, the rating of the ultraviolet lamp 8). , The distance between the irradiation unit 15 and the ultraviolet monitor 12a, the sensitivity of the ultraviolet monitor 12a, etc., and the input unit 133 and various information (for example, the detection result of the deterioration of the irradiation unit 15 and the reaction tank 6) Display unit 134 capable of displaying the ultraviolet transmittance of the treated water).
- the protective cover 14 shields the ultraviolet rays 10 irradiated from the irradiation unit 15.
- the protective cover 14 is provided outside the side surface 6 a and the side surface 6 b of the reaction vessel 6.
- FIG. 5 is a diagram showing the relationship between the UV monitor instruction value and the duty set value.
- FIG. 6 is a diagram showing the relationship between the UV monitor instruction value and the UV transmittance when the quality of the treated water passing through the reaction tank changes.
- FIG. 7 is a diagram showing a calculation result of the ultraviolet transmittance according to the equation (2) using the ultraviolet monitor instruction value and the duty setting value.
- the control unit 132 controls the power supply unit 131 to supply power to the ultraviolet lamp 8. Then, irradiation of the treatment ultraviolet rays to the treated water passing through the reaction tank 6 is started.
- the control unit 132 adjusts the ultraviolet intensity of ultraviolet rays emitted from the ultraviolet lamp 8 in accordance with a duty ratio (hereinafter referred to as duty setting value) input from the input unit 133 (hereinafter referred to as a pulse signal). , Referred to as a variable duty pulse signal).
- the control part 132 adjusts the ultraviolet-ray intensity of the ultraviolet-ray irradiated from the irradiation part 15.
- the ultraviolet monitor 12a measures the ultraviolet intensity of the ultraviolet light that has passed through the treated water when irradiation of the treated water with ultraviolet light is started.
- the ultraviolet monitor 12a is configured to detect the ultraviolet lamp according to the variable duty pulse signal having a duty setting value of 100% when the ultraviolet lamp 8 is not deteriorated and the ultraviolet transmittance UVT of the treated water is 100% / cm. 8, the ratio of the ultraviolet intensity of the ultraviolet light that has passed through the treated water to the ultraviolet intensity of the ultraviolet light irradiated from 8 (hereinafter referred to as an ultraviolet monitor instruction value) is calculated.
- the control unit 132 detects that the irradiation unit 15 has deteriorated in accordance with the ultraviolet intensity measured by the ultraviolet monitor 12a.
- the ultraviolet monitor instruction value calculated by the ultraviolet monitor 12a is reduced to a predetermined value at which the treatment performance for treated water (for example, disinfection performance or the like cannot be maintained), Detects deterioration.
- control unit 132 (calculation unit) is based on the ultraviolet ray intensity of the ultraviolet ray irradiated from the irradiation unit 15 according to the duty setting value and the measured ultraviolet ray intensity (the ultraviolet ray intensity of the ultraviolet ray that has passed through the treated water).
- the ultraviolet transmittance UVT of ultraviolet rays with respect to the treated water is calculated.
- the control unit 132 calculates the ultraviolet transmittance UVT based on the duty setting value and the ultraviolet lamp instruction value S measured by the ultraviolet monitor 12a.
- the UV monitor instruction value S (%) measured by the UV monitor 12a is a change value F (UVT), which is a ratio representing the UV transmittance UVT of the treated water, and the duty setting, as shown in the following formula (1). It is expressed as a function of a lamp input value D which is a ratio representing the value.
- S F (UVT) ⁇ S 100 ⁇ D (1)
- S 100 is an ultraviolet monitor instruction value S (100%) when the ultraviolet lamp 8 is not deteriorated, the ultraviolet transmittance UVT is 100% / cm, and the duty set value is 100%. .
- the ultraviolet monitor instruction value S increases in proportion to the duty set value.
- the relationship between the ultraviolet monitor instruction value S and the duty set value is represented by a linear function passing through the origin, as shown in FIG.
- the control unit 132 calculates the ultraviolet light transmittance UVT by Expression (2) using the ultraviolet ray monitor instruction value S and the duty set value.
- UVT A ⁇ ln (B ⁇ S / D) (2)
- the ultraviolet monitor instruction value S changes exponentially with respect to the change in the ultraviolet transmittance UVT calculated by the equation (2). That is, according to the equation (2), when the duty setting value is constant, the ultraviolet monitor instruction value S that changes exponentially with respect to the change in the ultraviolet transmittance UVT can be calculated.
- control unit 132 displays the detection result of the deterioration of the irradiation unit 15 (for example, that the ultraviolet monitor instruction value S has dropped below a predetermined value at which the treatment performance for the treated water cannot be maintained) and the calculated ultraviolet transmittance UVT. Displayed on the unit 114.
- the ultraviolet ray intensity of the treatment ultraviolet ray irradiated to the treated water from the irradiation unit 15 according to the duty setting value and the treated water are transmitted.
- the ultraviolet transmittance UVT based on the ultraviolet intensity of the ultraviolet rays, there is no need to provide a dedicated measuring instrument capable of measuring the ultraviolet transmittance, so the ultraviolet rays of the treated water can be obtained at a low cost and with a simple configuration.
- the transmittance UVT can be calculated.
- the present embodiment is an example of detecting that the irradiated portion has deteriorated according to the ultraviolet intensity of the ultraviolet light that has passed through the treated water and the calculated ultraviolet transmittance.
- description of the same parts as those in the first embodiment will be omitted.
- the control unit 132 detects that the irradiation unit 15 has deteriorated in accordance with the ultraviolet intensity of ultraviolet rays that have passed through the treated water (in this embodiment, the ultraviolet monitor instruction value S) and the calculated ultraviolet transmittance UVT. Specifically, the control unit 132 reduces the measured ultraviolet monitor instruction value S to a predetermined value or less at which the treatment performance for the treated water cannot be maintained, and the calculated ultraviolet transmittance UVT is equal to or lower than a preset transmittance. In such a case, there is a high possibility that the UV monitor instruction value S has decreased due to temporary deterioration of the quality of the treated water. Therefore, in this case, the control unit 132 does not detect that the measured ultraviolet monitor instruction value S is equal to or less than the predetermined value as the deterioration of the irradiation unit 15.
- the control unit 132 deteriorates the ultraviolet lamp 8 and the protective tube 7. It is highly possible that the UV monitor instruction value S has decreased. Therefore, in this case, the control unit 132 detects that the measured ultraviolet monitor instruction value S is equal to or less than a predetermined value as the deterioration of the irradiation unit 15.
- the ultraviolet irradiation device 1 by detecting that the irradiation unit 15 has deteriorated according to the ultraviolet intensity of the ultraviolet rays that have passed through the treated water and the calculated ultraviolet transmittance UVT, When the ultraviolet monitor instruction value S is reduced due to the deterioration of the quality of the treated water, it is not detected as the deterioration of the irradiation unit 15 that the measured ultraviolet monitor instruction value S is less than the predetermined value. Degradation detection accuracy can be improved.
- the ultraviolet monitor is disposed away from the irradiation unit so that the displacement of the ultraviolet transmittance due to the deterioration of the irradiation unit and the ultraviolet monitor is equal to or less than the allowable error.
- description of the same parts as those in the above-described embodiment will be omitted.
- FIG. 8 is a vertical cross section of a reaction tank provided in the ultraviolet irradiation apparatus according to the third embodiment.
- the ultraviolet irradiation device 800 according to the present embodiment is provided so as to be movable along the protective tube 7 and removes dirt and the like attached to the outer surface of the protective tube 7 (not shown). ) Is provided in parallel with the protective tube 7.
- two ultraviolet monitoring windows 802 and 803 arranged side by side in the direction from the water supply port to the drain port (flow direction of the treated water) are respectively provided above and below the reaction tank 6. Is provided. Then, the ultraviolet ray monitoring window 803 (ultraviolet monitor 12a) arranged on the downstream side in the flow direction of the treated water measures the ultraviolet intensity of ultraviolet rays emitted from the irradiation unit 15 arranged on the upstream side in the flow direction of the treated water. Arranged to be able to.
- the ultraviolet monitoring window 803 is provided toward the central axis C of the protective tube 7 (ultraviolet lamp 8) disposed on the upstream side in the flow direction of the treated water.
- the ultraviolet ray monitoring window 802 (ultraviolet monitor 12a) arranged on the upstream side in the flow direction of the treated water measures the ultraviolet intensity of ultraviolet rays emitted from the irradiation unit 15 arranged on the downstream side in the flow direction of the treated water.
- the ultraviolet ray monitoring window 802 is provided toward the central axis C of the protective tube 7 (ultraviolet lamp 8) arranged on the downstream side in the flow direction of the treated water.
- the ultraviolet ray monitoring windows 802 and 803 are set so that the displacement amount of the ultraviolet ray transmittance UVT due to the deterioration of the irradiation unit 15 and the ultraviolet ray monitoring windows 802 and 803 (ultraviolet monitor 12a) is less than the allowable error. It is arranged away from the irradiation unit 15. Specifically, the ultraviolet ray monitoring windows 802 and 803 have a displacement amount of the ultraviolet ray transmittance UVT when the ultraviolet ray intensity of the ultraviolet ray that has passed through the treated water (in this embodiment, the ultraviolet ray monitor instruction value S) decreases to a predetermined value.
- 0.7 is a ratio representing a predetermined value (for example, 70%) at which the treatment performance for the treated water cannot be maintained.
- the ultraviolet ray monitoring window 803 is provided so as to be able to measure the ultraviolet intensity of the ultraviolet ray emitted from the irradiation unit 15 arranged on the upstream side, and the ultraviolet ray monitoring window 802 is emitted from the irradiation unit 15 arranged on the downstream side.
- the ultraviolet ray intensity of the ultraviolet rays to be measured is provided so that the amount of displacement of the ultraviolet ray transmittance UVT due to deterioration of the irradiation unit 15 and the ultraviolet ray monitoring windows 802 and 803 (ultraviolet ray monitor 12a) is less than an allowable error.
- the present invention is not limited to this.
- the ultraviolet ray monitoring window 803 is provided so as to be able to measure the ultraviolet intensity of the ultraviolet ray emitted from the irradiation unit 15 arranged on the downstream side, and the ultraviolet ray emitted from the irradiation unit 15 arranged on the upstream side. It may be provided so that the ultraviolet intensity of can be measured.
- FIG. 9 is a diagram illustrating a calculation result of the ultraviolet transmittance when the ultraviolet monitor instruction value is reduced to 70% due to the deterioration of the irradiation unit of the ultraviolet irradiation device according to the third embodiment.
- the ultraviolet irradiation device 800 has a history of operation, a decrease in the ultraviolet intensity of the ultraviolet rays irradiated from the ultraviolet lamp 8 due to the deterioration of the ultraviolet lamp 8, a decrease in the transmittance of ultraviolet rays in the protective tube 7 due to the deterioration of the protective tube 7, Due to dirt adhering to the protective tube 7, dirt on the UV monitoring windows 802, 803, etc., the UV monitor instruction value S (measurement result of the UV intensity of the UV light transmitted through the treated water) measured by the UV monitor 12a is reduced.
- the ultraviolet lamp 8, the protective tube 7, and the ultraviolet monitoring windows 802 and 803 are consumables, and the measured ultraviolet monitor instruction value S is a predetermined value (70% in this embodiment) at which the treatment performance of the treated water cannot be maintained. ) It is exchanged as the lifetime when it falls below.
- the ultraviolet ray monitoring windows 802 and 803 are irradiated so that the displacement amount of the ultraviolet ray transmittance UVT when the ultraviolet ray monitor instruction value S is reduced to 70% is equal to or less than an allowable error (3%). It is provided apart from the part 15. Therefore, even when the ultraviolet monitor instruction value S is reduced to 70%, the displacement amount of the ultraviolet transmittance UVT calculated by the control unit 132 is 100% as shown in FIG. In this case, the permissible error (3%) is less than or equal to the ultraviolet transmittance UVT (see FIG. 7).
- the ultraviolet transmittance UVT whose displacement is less than the allowable error can be obtained. Further, it is possible to calculate the ultraviolet transmittance UVT in which the influence of deterioration of the irradiation unit 15 and the like is reduced.
- the ultraviolet monitor 12a allows the displacement of the ultraviolet transmittance UVT due to the deterioration of the irradiation unit 15 and the ultraviolet monitoring windows 802 and 803 (ultraviolet monitor 12a).
- the ultraviolet intensity measured by the ultraviolet monitor 12a is reduced due to deterioration of the irradiation unit 15 and the ultraviolet monitoring windows 802 and 803 (ultraviolet monitor 12a).
- the UV transmittance UVT whose displacement is less than the allowable error can be obtained, the UV transmittance UVT in which the influence of the deterioration of the irradiation unit 15 and the UV monitor windows 802 and 803 (UV monitor 12a) is reduced. Can be calculated.
- the present embodiment calculates the effective irradiation intensity of the treatment ultraviolet ray irradiated from the irradiation unit and the effective transmission intensity measured by the ultraviolet monitor using the ultraviolet ray transmittance with respect to the treated water measured by the external measuring device.
- this is an example of calculating the ultraviolet transmittance based on the calculated effective irradiation intensity and effective transmission intensity. In the following description, description of the same parts as those in the above-described embodiment will be omitted.
- FIG. 10 is a block diagram showing a hardware configuration of an electronic ballast included in the ultraviolet irradiation device according to the fourth embodiment.
- the electronic ballast 1001 included in the ultraviolet irradiation apparatus 1000 according to the present embodiment includes a power supply unit 131, an input unit 133, a display unit 134, and a control unit 1002.
- the control unit 1002 uses the ultraviolet ray transmittance (hereinafter referred to as the degradation coefficient K) with respect to the treated water measured by the external measuring device 500 to treat ultraviolet rays for treatment irradiated from the irradiation unit 15.
- the effective irradiation intensity and the effective transmission intensity measured by the ultraviolet monitor 12a are calculated, and the ultraviolet transmittance UVT is calculated based on the calculated effective irradiation intensity and effective transmission intensity.
- the effective irradiation intensity is the ultraviolet intensity of the ultraviolet rays irradiated to the treated water in consideration of the decrease in the ultraviolet intensity of the ultraviolet rays irradiated from the ultraviolet lamp 8 and the decrease in the ultraviolet transmittance of the protective tube 7 (this embodiment). In the embodiment, it is the ultraviolet intensity of the ultraviolet ray according to the lamp input value D, which is a ratio representing the duty setting value.
- the effective transmission intensity is the ultraviolet intensity of the ultraviolet light that has passed through the treated water in consideration of a decrease in the ultraviolet intensity measured by the ultraviolet monitor 12a (in this embodiment, the ultraviolet monitor instruction value S).
- the control unit 1002 determines the deterioration coefficient K, which is the transmittance of ultraviolet rays measured by the external measuring device 500, the lamp input value D, and the ultraviolet ray monitor instruction value S according to the following formulas (4) and (5).
- UVT A ⁇ ln (B ⁇ S / D / K) (5)
- Irradiation from the ultraviolet lamp 8 is performed by calculating the effective irradiation intensity of the ultraviolet rays and the effective transmission intensity measured by the ultraviolet monitor 12a, and calculating the ultraviolet transmittance UVT based on the calculated effective irradiation intensity and effective transmission intensity. It is possible to calculate the UV transmittance UVT in which the influence of the decrease in the UV intensity of the UV light, the decrease in the UV transmittance of the protective tube 7 and the decrease in the UV intensity measured by the UV monitor 12a are reduced.
- the ultraviolet irradiation devices 1, 800 and 1000 calculate the ultraviolet transmittance UVT based on the measurement result of the ultraviolet intensity of the ultraviolet rays by the ultraviolet monitor 12 a used for detecting the deterioration of the irradiation unit 15.
- the ultraviolet irradiation devices 1, 800, 1000 include a second measuring unit that measures the ultraviolet intensity of ultraviolet rays that have passed through the treated water, separately from the ultraviolet monitor 12a, and the control units 132, 1002 (calculating units)
- the ultraviolet transmittance may be calculated based on the ultraviolet intensity of the ultraviolet light emitted from the irradiation unit 15 and the ultraviolet intensity measured by the second measuring unit.
- the ultraviolet irradiation devices 1,800, 1000 calculate the ultraviolet transmittance UVT based on the ultraviolet intensity of the ultraviolet rays from the irradiation unit 15 that irradiates the processing ultraviolet rays. It is not limited to.
- the control units 132 and 1002 calculate the ultraviolet transmittance UVT based on the ultraviolet intensity of the ultraviolet rays emitted from the second irradiation unit and the ultraviolet intensity measured by the second measurement unit. You may do it. Thereby, since the ultraviolet rays for calculating the ultraviolet transmittance UVT can be irradiated to the treated water without being affected by the deterioration of the irradiating section 15, the calculation accuracy of the ultraviolet transmittance UVT can be improved. .
- the second measurement unit includes the second irradiation unit and the second measurement as in the positional relationship between the irradiation unit 15 and the ultraviolet monitoring windows 802 and 803 included in the ultraviolet irradiation device 800 according to the third embodiment. It is preferable that the ultraviolet ray transmittance UVT due to the deterioration of the part is disposed away from the second irradiation part so that the displacement amount is equal to or less than the allowable error.
- the second irradiation unit irradiates the processing water with ultraviolet rays for calculation when the ultraviolet irradiation device 1,800, 1000 is inspected. Thereby, deterioration of the 2nd irradiation part by irradiating with an ultraviolet-ray can be delayed.
- control units 132 and 1002 calculate the ultraviolet transmittance UVT calculated based on the ultraviolet intensity of the ultraviolet rays irradiated from the irradiation unit 15 and the ultraviolet intensity measured by the ultraviolet monitor 12a, and the second Deterioration of the irradiation unit 15 and the ultraviolet monitor 12a is detected using the ultraviolet ray transmittance UVT calculated based on the ultraviolet ray intensity of the ultraviolet ray emitted from the irradiation unit and the ultraviolet ray intensity measured by the second measurement unit. It is also possible to do. Further, the measurement result of the ultraviolet intensity by the ultraviolet monitor 12a may be corrected based on the detection result of the deterioration of the ultraviolet monitor 12a.
- the ultraviolet transmittance of the treated water is reduced with a low-cost and simple configuration. Can be calculated.
- the program executed by the ultraviolet irradiation device 1,800, 1000 of the present embodiment is provided by being incorporated in advance in a ROM or the like.
- the programs executed by the ultraviolet irradiation devices 1, 800 and 1000 of the present embodiment are files in an installable format or executable format, and are CD-ROM, flexible disk (FD), CD-R, DVD (Digital It may be configured to be recorded on a computer-readable recording medium such as Versatile Disk).
- the program executed by the ultraviolet irradiation apparatus 1,800, 1000 of the present embodiment may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network. good. Moreover, you may comprise so that the program performed with the ultraviolet irradiation device 1,800,1000 of this embodiment may be provided or distributed via networks, such as the internet.
- the program executed by the ultraviolet irradiation devices 1, 800, 1000 according to the present embodiment has a module configuration including the above-described units (control units 132, 1002). As actual hardware, a CPU (processor) is described above. By reading the program from the ROM and executing it, the above-described units are loaded onto the main storage device, and the control units 132 and 1002 are generated on the main storage device.
- a CPU processor
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Abstract
Description
まず、図1を用いて、本実施形態にかかる上水処理システムにおける処理の流れの概要を説明する。図1は、第1の実施形態にかかる上水処理システムにおける処理水の処理工程を示すフローチャートである。本実施形態にかかる上水処理システムは、図1に示すように、川,湖または地下水等から原水(処理対象の処理水の一例)を取水する(ステップS101)。次に、上水処理システムは、取水された原水を凝集沈殿槽に導入し、これに凝集剤を添加して凝集・沈殿させる(ステップS102)。次いで、上水処理システムは、図1に示すように、凝集沈殿槽の上澄み水を活性炭濾過槽に送って異物を濾過する(ステップS103)。さらに、上水システムは、濾過水を紫外線照射装置1(図2参照)に送って紫外線を照射し(ステップS104)、紫外線を照射したUV消毒処理水を塩素注入槽に送って塩素を注入した後に(ステップS105)、一般家庭や事業所などに配水する。
S=F(UVT)×S100×D ・・・(1)
ここで、S100は、紫外線ランプ8が劣化しておらず、紫外線透過率UVTが100%/cmで、かつデューティ設定値が100%である場合における紫外線モニタ指示値S(100%)である。
UVT=A×ln(B×S/D) ・・・(2)
ここで、AおよびBは所定の係数であり、本実施形態では、A=8.8588,B=10000であるものとする。
本実施形態は、処理水を透過した紫外線の紫外線強度および算出した紫外線透過率に従って照射部が劣化したことを検出する例である。なお、以下の説明では、第1の実施形態と同様の箇所について説明を省略する。
本実施形態では、紫外線モニタが、照射部および紫外線モニタの劣化による紫外線透過率の変位量が許容誤差以下となるように、照射部から離間して配置された例である。以下の説明では、上述の実施形態と同様の箇所については説明を省略する。
UVTn=(1-0.03)n=0.97n≧0.7・・・(3)
n≧11.5(cm)
ここで、0.7は、処理水に対する処理性能が維持できなくなる所定値(例えば、70%)を表す比である。
本実施形態は、外部計測機器により計測された処理水に対する紫外線の透過率を用いて、照射部から照射される処理用の紫外線の実効照射強度および紫外線モニタにより計測される実効透過強度を算出するとともに、算出した実効照射強度および実効透過強度に基づいて紫外線透過率を算出する例である。以下の説明では、上述の実施形態と同様の箇所については説明を省略する。
K=S/(UVT,D,S)
=S/(1/B×exp(UVT×D/A) ・・・(4)
UVT=A×ln(B×S/D/K) ・・・(5)
Claims (6)
- 処理対象となる処理水に対して処理用の紫外線を照射する照射部と、
前記処理水を透過した紫外線の紫外線強度を計測する計測部と、
前記計測部により計測された紫外線強度に従って前記照射部が劣化したことを検出する検出部と、
予め設定された設定値に応じて前記照射部から照射される紫外線の紫外線強度と前記計測部により計測された紫外線強度とに基づいて、前記処理水の紫外線透過率を算出する算出部と、
前記検出部による前記照射部の劣化の検出結果および前記算出部により算出した前記紫外線透過率を表示する表示部と、
を備えた紫外線照射装置。 - 前記検出部は、前記計測部により計測された紫外線強度および前記算出部により算出された前記紫外線透過率に従って前記照射部が劣化したことを検出する請求項1に記載の紫外線照射装置。
- 前記計測部は、前記照射部の劣化による前記紫外線透過率の変位量が許容誤差以下となるように、前記照射部から離間して配置された請求項1または2に記載の紫外線照射装置。
- 前記計測部は、当該計測部により計測される紫外線強度が前記処理水に対する処理性能が維持できなくなる所定値まで低下した場合における前記紫外線透過率の変位量が前記許容誤差以下となるように、前記照射部から離間して配置された請求項3に記載の紫外線照射装置。
- 前記算出部は、外部計測機器により計測される前記処理水に対する紫外線の透過率に基づいて、前記照射部から照射される紫外線の実効照射強度および前記計測部により計測された実効透過強度を算出するとともに、前記実効照射強度および前記実効透過強度に基づいて前記紫外線透過率を算出する請求項1から4のいずれか一に記載の紫外線照射装置。
- 処理対象となる処理水に対して処理用の紫外線を照射する照射部と、
前記処理水を透過した紫外線の紫外線強度を計測する計測部と、
前記計測部により計測された紫外線強度に従って前記照射部が劣化したことを検出する検出部と、
予め設定された設定値と、当該設定値に応じて前記照射部から照射される紫外線の紫外線強度に対する前記計測部により計測された紫外線強度の比率とを用いて、下記式に基づいて、前記処理水の紫外線透過率を算出する算出部と、
前記検出部による前記照射部の劣化の検出結果および前記算出部により算出した前記紫外線透過率を表示する表示部と、
を備えた紫外線照射装置。
UVT=A×ln(B×S/D)
ここで、UVTは、前記紫外線透過率である。Sは、前記設定値に応じて前記照射部から照射される紫外線の紫外線強度に対する前記計測部により計測された紫外線強度の比率である。Dは、前記設定値を表す比である。AおよびBは、所定の係数である。
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CN201480044686.2A CN105452173B (zh) | 2013-09-12 | 2014-03-13 | 紫外线照射装置 |
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