JP2005052760A - Ultraviolet irradiation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet irradiation device which is less liable to cause deterioration of a filter and an ultraviolet sensor. <P>SOLUTION: The ultraviolet irradiation device has a water pipe 1 having an inflow port 1a and an outflow port 1b of water to be treated, an ultraviolet lamp 2 set in the water pipe 1, a ultraviolet sensor 3 measuring the amount of irradiation from the ultraviolet lamp 2, and a shield 4 installed between the ultraviolet lamp 2 and the ultraviolet sensor 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ultraviolet irradiation device for sterilizing / disinfecting water to be treated.

Conventionally, in order to confirm whether or not the amount of ultraviolet rays necessary for sterilization and disinfection of water to be treated is transmitted, an ultraviolet sensor is usually provided to continuously monitor the amount of ultraviolet irradiation.
Here, when a general photodiode is used as an ultraviolet sensor, since the ultraviolet irradiation amount is continuously measured, there is a problem that the filter is deteriorated by ultraviolet rays, and the filter needs to be frequently replaced or calibrated. It was. In addition, when an SiC photodiode that is read by an ultraviolet light emitting element (SiC) and converted into an electrical signal without using a filter is used as an ultraviolet sensor, advanced technology is required to form the element, which is expensive. was there. In addition, since the amount of ultraviolet irradiation is continuously measured, even when a SiC photodiode is used, the photodiode deteriorates, and there is a problem that replacement or calibration is required about once every three years. It is also conceivable to provide a built-in measuring device consisting of quartz glass and an ultraviolet sensor in the main body, but in this case, it is necessary to clean the quartz glass for contamination, and therefore the treatment of water to be treated is stopped. There was a problem that the water to be treated had to be removed from the main body.

  Since the ultraviolet sensor is deteriorated by long-time irradiation of ultraviolet rays, it is preferable to irradiate ultraviolet rays only when necessary, for example, when measuring the amount of ultraviolet irradiation. For this purpose, it is effective to attach a shield. However, conventionally, in a sealed ultraviolet irradiation apparatus that passes the treated water through the apparatus and sterilizes it, the simple shield prevents leakage of the treated water. There was a problem that it was difficult. Conversely, when a shield is installed to prevent leakage of treated water, the structure becomes larger, the distance from the ultraviolet lamp to the ultraviolet sensor becomes longer, and the ultraviolet irradiation level in the ultraviolet sensor becomes an undetected level. There was a problem that it dropped to.

  Conventionally, an ultraviolet sensor is installed in the liquid contact part with the water to be treated, and a quartz window for transmitting ultraviolet rays is provided in that part. Adhere to. For this reason, there has been a problem that a measurement error of the ultraviolet ray irradiation amount is increased due to a decrease in the ultraviolet ray irradiation amount to be measured due to the diffusion of the ultraviolet ray.

  The above prior art is a technique generally known to those skilled in the art, and does not relate to a known literature invention.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an ultraviolet irradiation device that is less susceptible to deterioration of a filter and an ultraviolet sensor and that can stably measure the amount of ultraviolet irradiation. .

  An ultraviolet irradiation device according to the present invention includes a water pipe provided with an inlet and an outlet of water to be treated, an ultraviolet lamp disposed in the water pipe, an ultraviolet sensor for measuring an irradiation amount of the ultraviolet lamp, A shield provided between the ultraviolet lamp and the ultraviolet sensor is provided.

  The ultraviolet irradiation apparatus according to the present invention is further characterized in that a driving device is provided in the shield.

  The ultraviolet irradiation device according to the present invention is further characterized in that a condenser is provided between the ultraviolet lamp and the ultraviolet sensor.

  The ultraviolet irradiation device according to the present invention is further characterized in that an optical fiber that relays between the ultraviolet lamp and the ultraviolet sensor is provided.

  An ultraviolet irradiation device according to the present invention includes a water pipe provided with an inlet and an outlet of water to be treated, an ultraviolet lamp disposed in the water pipe, an ultraviolet sensor for measuring an irradiation amount of the ultraviolet lamp, And a drive unit provided in the ultraviolet sensor.

  An ultraviolet irradiation device according to the present invention includes a water pipe having an inlet and an outlet of water to be treated, an ultraviolet lamp disposed in the water pipe, an optical sensor for measuring an irradiation amount of the ultraviolet lamp, A quartz glass provided with a fluorescent material and provided between an ultraviolet lamp and an optical sensor is provided.

According to the present invention, the following excellent effects can be obtained.
-As a shield between the sensor and the mounting nozzle, a 2-way valve, a 3-way valve, a 4-way valve, or a shutter is provided to open the valve when you want to use it. Filter deterioration can be prevented. It is possible to clean the attached nozzle staying water portion and the sensor light receiving surface. Since the strong light of the medium pressure lamp can be blocked, the deterioration of the diode can be prevented.
・ Move the sensor with a drive and move it to the standby position where a UV shield film as a shield is attached inside the quartz sheath to prevent deterioration of the diode and filter.
-Since a shutter is installed in front of the sensor and measurement is performed intermittently, the strong light of the medium-pressure lamp is also blocked, preventing deterioration of the diode and filter. The UV irradiation amount can be confirmed stably.
・ The sensor placed in the quartz sheath is installed horizontally with the lamp, and the dirt of the quartz sheath and tube is removed with a sensor wiper that moves in conjunction with the lamp wiper, so that the amount of UV rays measured and the occurrence of diffusion are eliminated. Measurement error can be reduced. Furthermore, the sensor is moved by a driving machine and moved to a standby position where an ultraviolet cut film is attached as a shield inside the quartz sheath, thereby preventing deterioration of the diode and the filter.
-By providing a condensing lens, it is possible to use an inexpensive commercially available valve (all channel open type) as a shield by increasing the irradiation level of the sensor, and to leak the fluid in the device. Therefore, the sensor can be protected.
・ By providing an optical fiber, even if the distance from the UV lamp to the sensor is increased, the UV irradiation level does not decrease to the level outside detection.
・ Install the sensor in the quartz sheath tube horizontally with the lamp, and rotate the sensor with a drive so that it faces the UV irradiation side only during measurement. As a result, the deterioration of the filter can be prevented, and it is no longer necessary to replace and calibrate the filter frequently.
・ By installing a short cylindrical or rectangular parallelepiped optical converter with quartz glass between the ultraviolet lamp and the optical sensor, the ultraviolet sensor is converted into visible light. Can be realized.

・ By providing a system that promptly notifies the administrator of the effects of short-circuit current, undisinfected water is discharged due to target water passing through areas where light does not reach due to lamp breakage, resulting in an increase in the number of detected bacteria. The performance is not significantly reduced, and a stable disinfection performance can be obtained.
The lamp in which the amalgam for increasing the amount of ultraviolet rays is enclosed is a mercury lamp improved so that iridium or the like is combined with mercury in the conventional low-pressure lamp tube so that the ultraviolet rays can be emitted two to three times the conventional amount. With this technology, without changing the arc length of 1.5 m, the output of ultraviolet light (ultraviolet C) is increased to 0.5 W / cm with an amalgam lamp, compared to 0.2 W / cm of ultraviolet light (ultraviolet C) of a conventional low-pressure lamp. Therefore, the number of lamps can be reduced to 1/3.
・ By changing the flow direction perpendicular to the lamp and using a water pipe structure with reduced passage resistance, the passage resistance of the inflow nozzle can be reduced by 30% (compared to our conventional system), and design freedom is further improved. Increase.
・ Sterile disinfection performance is stabilized by adding a bowl-shaped roundness to the opening of the quartz sheath and improving the adhesion between the water pipe contact portion, the quartz sheath and the O-ring, and improving the sealing performance. As a result, leakage due to flooding, the risk of destruction decreased, and the reliability of the equipment improved.
・ By using high-purity quartz glass for the glass tube of the lamp, it is an ozone-generating lamp that generates ozone from oxygen molecules, so not only disinfection but also reduction and disinfection of TOC due to the organic matter decomposition effect by ozone. It became.
・ In addition to the above effects, it is possible to obtain the effects of economic efficiency and easy maintenance.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing an ultraviolet irradiation apparatus according to Embodiment 1 of the present invention.
The ultraviolet irradiation device according to the first embodiment includes a water pipe 1 having an inlet 1a and an outlet 1b of water to be treated, an ultraviolet lamp 2 disposed in the water pipe 1, and an irradiation amount of the ultraviolet lamp 2. An ultraviolet sensor 3 to be measured, and a shield 4 provided between the ultraviolet lamp 2 and the ultraviolet sensor 3 are provided.
In the first embodiment, a bulb is provided as a shield 4 between the ultraviolet lamp 2 and the ultraviolet sensor 3.
For example, as shown in FIG. 2A, a two-way valve 6 is provided between the ultraviolet sensor 3 and the mounting nozzle. As shown in FIG. 2B, a three-way valve 7 is provided between the ultraviolet sensor 3 and the mounting nozzle. As shown in FIG. 2C, a four-way valve 8 is provided between the ultraviolet sensor 3 and the mounting nozzle so that clean water or chemicals can be injected.
As a result, the valve is opened only when necessary, for example, when measuring the amount of ultraviolet irradiation, so that the filter can be prevented from deteriorating. It is possible to clean the staying water portion of the mounting nozzle and the light receiving surface of the sensor. Since the strong light of the medium pressure type ultraviolet lamp is blocked, it is possible to prevent deterioration of the ultraviolet sensor and the filter. The amount of ultraviolet irradiation can be confirmed stably. Maintenance becomes easy and people, goods and money can be reduced.

Embodiment 2. FIG.
In the second embodiment, a shutter is provided as a shield 4 between the ultraviolet lamp 2 and the ultraviolet sensor 3.
For example, as shown in FIG. 3, a shutter 9 is provided in front of the ultraviolet sensor 3, and the shutter 9 is moved by an electromagnetic force generation facility 10 that generates electromagnetic force such as a solenoid. As shown in FIG. 4, a shutter 11 is provided in front of the ultraviolet sensor 3, and the shutter 11 is moved by air discharge force. As shown in FIG. 5, a shutter 12 is provided in front of the ultraviolet sensor 3, and the shutter 12 is moved up and down by a motor (driving machine) 13 under timer control. As shown in FIG. 6, a shutter 14 is provided in front of the ultraviolet sensor 3, and the shutter 14 is rotated by a motor (driving machine) 15 under timer control. However, the present invention is not limited to the above as long as the shutter can be moved.
As a result, since the ultraviolet irradiation amount is intermittently measured, the deterioration of the filter can be prevented. Further, by blocking the strong light of the medium pressure type ultraviolet lamp, it is possible to prevent the deterioration of the ultraviolet sensor and the filter. The amount of ultraviolet irradiation can be confirmed stably. Maintenance becomes easy and people, goods and money can be reduced.

Embodiment 3 FIG.
In the third embodiment, a condenser lens (condenser) 21 is provided between the ultraviolet lamp 2 and the ultraviolet sensor 3 as shown in FIG.
As a result, the ultraviolet irradiation level in the ultraviolet sensor 3 can be increased. For this reason, it is possible to prevent leakage of water to be treated in the apparatus and protect the ultraviolet sensor 3 by using an inexpensive commercially available valve (all flow path open type) 22 or the like as a shield.

Embodiment 4 FIG.
In the fourth embodiment, as shown in FIG. 8, an optical fiber 31 that relays between the ultraviolet lamp 2 and the ultraviolet sensor 3 is provided.
As a result, even if the distance from the ultraviolet lamp 2 to the ultraviolet sensor 3 is increased, the ultraviolet irradiation level in the ultraviolet sensor 3 does not decrease beyond the detection level.
Moreover, the optical fiber 31 is installed so that the to-be-processed water in an apparatus may not leak, so that a water pipe may be penetrated.
As a result, the ultraviolet sensor 3 can be protected by a simple shutter 32 or the like.
The optical fiber may be provided from the water pipe to the ultraviolet sensor. Alternatively, a part from the shutter 32 to the ultraviolet lamp 2 may be provided.

Embodiment 5 FIG.
In the ultraviolet irradiation apparatus according to the fifth embodiment, as shown in FIG. 9, the ultraviolet sensor 3 housed in the quartz sheath 41 is installed horizontally with the ultraviolet lamp 2a housed in the quartz sheath 42. Then, the ultraviolet sensor 3 is rotated by a motor (driving machine) 43 so that the light receiving surface of the ultraviolet sensor 3 is directed toward the ultraviolet lamp 2a when measuring the amount of ultraviolet irradiation, and the light receiving surface of the ultraviolet sensor 3 is directed to the ultraviolet lamp 2a except during measurement. Turn to the opposite side. Alternatively, the ultraviolet sensor 3 is moved up and down by a motor (driving machine) 43, and the ultraviolet sensor 3 is disposed at the measurement position of the ultraviolet irradiation amount when measuring the ultraviolet irradiation amount. It moves to the attachment position of the ultraviolet cut film provided as a shield.
As a result, it is possible to prevent deterioration of the ultraviolet sensor and the filter. The amount of ultraviolet irradiation can be confirmed stably. Maintenance becomes easy and people, goods and money can be reduced.
Further, in the ultraviolet irradiation device of the fifth embodiment, a ring-shaped ultraviolet sensor wiper 44 surrounding the quartz sheath 41 and the ring-shaped ultraviolet lamp wiper 45 surrounding the quartz sheath 42 are connected by a motor 46. The quartz sheath for accommodating the ultraviolet sensor 3 is removed to remove dirt. Furthermore, a scale remover can be injected into the wiper collar.
The ultraviolet lamp 2a, the ultraviolet sensor 3, and the motors 43 and 46 are controlled by the control equipment 47. As the ultraviolet sensor 3, a wavelength conversion element type sensor that converts ultraviolet light into visible light for measurement is recommended.

Embodiment 6 FIG.
In the ultraviolet irradiation device according to the sixth embodiment, as shown in FIG. 10, low-pressure mercury 53 is enclosed between the ultraviolet lamp 2 and the optical sensor 51, and the fluorescent material 52b is disposed on the inner surface other than the ultraviolet lamp side. Is provided with a cylindrical or rectangular parallelepiped quartz glass container 52a. Thereby, the ultraviolet rays from the ultraviolet lamp 2 are converted into visible light on the fluorescent material application surface. For this reason, the optical sensor 51 is used for visible light.
As a result, since the optical sensor receives only visible light, the lifetime of the optical sensor can be extended.
If it is desired to measure only ultraviolet rays having a specific wavelength, an ultraviolet filter is inserted between the ultraviolet lamp and the quartz glass container coated with the fluorescent material.

  The ultraviolet irradiation device of the present invention has the following excellent features in addition to the features described in the above embodiments.

(1) Conventionally, when an amount of target water is increased, an ultraviolet lamp is generally configured to accommodate a plurality of ultraviolet lamps in an irradiation device. Ultraviolet light decreases with distance and water transmission. When the lamp burnout occurs, an area where light does not reach is generated, and the target water that passes through the area is called a short circuit flow. In the apparatus in which this short-circuit flow is generated, undisinfected water is discharged and the number of detected bacteria is increased, that is, the processing performance is remarkably deteriorated. However, as a method for detecting a short-circuit current, it is necessary for an administrator to determine the status of each lamp.
Therefore, as shown in FIG. 11, the apparatus of the present invention grasps the address of each lamp in the apparatus, and adjacent lamps (for example, M ₂ -2 and M ₂ -3, M ₂ -2 and M _3- 2) Detect that the break has occurred and output a serious failure. This system promptly notifies the administrator of the effects of short-circuit current. As a result, stable disinfection performance can be obtained.

(2) A conventional low-pressure lamp is generally a mercury lamp in which mercury is enclosed in an inert rare gas such as argon or neon in a lamp tube. In order to increase the amount of ultraviolet rays, it is conceivable to increase the pressure of mercury vapor in the tube or to increase the lamp arc length. The former is called a so-called medium-pressure lamp or high-pressure lamp, and the mercury vapor sealing pressure in the lamp tube is increased to 100 Pa or more. The latter indicates a general low-pressure lamp having an arc length of 1.5 m, and increases the number of arcs (number of lamps) to increase the amount of ultraviolet rays.
Therefore, the lamp in which the amalgam for increasing the amount of ultraviolet rays is sealed is a mercury lamp improved so that iridium or the like is combined with mercury in a conventional low-pressure lamp tube so that the ultraviolet rays can be emitted two to three times the conventional amount. With this technology, without changing the arc length of 1.5 m, the ultraviolet light amount (ultraviolet ray C) is 0.5 W / cm in the amalgam lamp, whereas the ultraviolet ray amount in the conventional low pressure lamp (ultraviolet ray C · 254 nm vicinity) is 0.2 W / cm. Therefore, the number of lamps can be reduced to 1/3.

(3) In the prior art, the water pipe has a general structure as shown in FIG. 12A provided with an inflow nozzle and an outlet nozzle through which the target water flows. There are lamps, quartz sheaths, frames, etc. inside the water pipe, and passage resistance is generated in proportion to the amount of water.
In the present invention, as shown in FIG. 12 (b), since it has a water pipe structure with reduced passage resistance, the passage of the inflow nozzle is changed by changing the flow in the direction perpendicular to the lamp and allowing it to flow horizontally into the lamp. The resistance has been reduced by 30% (compared to our company) from the conventional system.
As a result, the degree of freedom in design increases.

(4) In the prior art, as shown in FIG. 13 (a), the ultraviolet lamp 61 irradiates the target microorganisms with ultraviolet rays, so that the target microorganism is discharged in a state of being stored in the quartz sheath 62 and immersed in the flow path. The method is common. The sheath pipe 62 is structured to be sealed with an O-ring 63 and a nut 64 in order to prevent leakage of water to be treated to the outside. If the sealing water is not sufficient, water enters the inside of the sheath tube 62, evaporation of water due to the heat of the lamp, and clouding inside the sheath tube, which hinders ultraviolet light.
Therefore, as shown in FIG. 13 (b), the apparatus of the present invention focuses on the sealing structure of the quartz sheath 62 as a method for reducing water immersion as much as possible, and has a bowl-shaped roundness 62a at the opening of the quartz sheath 62. In order to improve the sealing performance, the contact between the water pipe 65 contact portion, the quartz sheath 62, and the O-ring 63 is improved.
As a result, the disinfection performance was stabilized, the leakage due to water immersion, the risk of destruction decreased, and the reliability of the equipment was improved.

(5) A conventional low-pressure lamp is made of quartz glass that does not transmit ultraviolet light having a wavelength of 184 nm in order to efficiently emit ultraviolet light having a wavelength of 254 nm.
The apparatus of the present invention uses high-purity quartz glass for the glass tube of the lamp so as to emit ultraviolet light having a wavelength of 200 nm or less, which can reduce TOC as well as disinfection. For this reason, since it was set as the ozone generation type lamp | ramp which produces | generates ozone from an oxygen molecule, not only disinfection but the organic substance decomposition | disassembly effect by ozone can be anticipated.
As a result, TOC can be reduced along with disinfection.

  In addition, since the apparatus of this invention has little deterioration of a sensor, since the irradiation amount of an ultraviolet-ray can be measured continuously, the stable irradiation amount can be obtained. Therefore, water that is used by an unspecified number of people, such as bathtub water, hot spring water, pools, and hydrophilicity, that needs to be disinfected continuously is targeted. For example, it is used as a disinfection facility for measures against pathogenic microorganisms (for example, Legionella) in bathtub water that uses the same water for a long period of time. It is also used for water and sewage, simple water supply, building management (chlorine concentration management of water supply tanks), etc. When used with a chlorine disinfection facility, a strong disinfection effect is still obtained.

It is the schematic which shows the ultraviolet irradiation device by Embodiment 1. FIG. It is a figure which shows the example of a valve | bulb. It is a figure which shows an example of a shutter. It is a figure which shows an example of a shutter. It is a figure which shows an example of a shutter. It is a figure which shows an example of a shutter, (b) is sectional drawing along the II line in (a). FIG. 5 is a schematic diagram showing an ultraviolet irradiation device according to a third embodiment. It is the schematic which shows the ultraviolet irradiation device by Embodiment 4. It is the schematic which shows the ultraviolet irradiation device by Embodiment 5. It is the schematic which shows the ultraviolet irradiation device by Embodiment 6. It is the schematic which shows a several lamp. It is the schematic which shows a water pipe. It is the schematic which shows the attachment structure of an ultraviolet lamp.

Explanation of symbols

1 Flow pipe 1a Inlet 1b Outlet 2 UV lamp (including quartz sheath)
2a UV lamp 3 UV sensor 4 Shield 5 Window 6 Two-way valve 7 Three-way valve 8 Four-way valve 9, 11, 12, 14 Shutter 10 Electromagnetic force generating equipment 13, 15 Motor 21 Condensing lens 22 Valve 31 Optical fiber 32 Shutter 41, 42 Quartz sheath 43, 46 Motor 44 UV sensor wiper 45 UV lamp wiper 47 Control equipment 51 Optical sensor 52a Quartz glass container 52b Fluorescent material 53 Mercury

Claims (6)

  In the ultraviolet irradiation apparatus comprising a water pipe having an inlet and an outlet for water to be treated, an ultraviolet lamp disposed in the water pipe, and an ultraviolet sensor for measuring an irradiation amount of the ultraviolet lamp, An ultraviolet irradiation device, wherein a shield is provided between a lamp and the ultraviolet sensor.   The ultraviolet irradiation device according to claim 1, wherein the shield is provided with a drive unit.   The ultraviolet irradiation device according to claim 1, wherein a condenser is provided between the ultraviolet lamp and the ultraviolet sensor.   The ultraviolet irradiation device according to claim 1, further comprising an optical fiber that relays between the ultraviolet lamp and the ultraviolet sensor.   In the ultraviolet irradiation apparatus comprising a water pipe having an inlet and an outlet for water to be treated, an ultraviolet lamp disposed in the water pipe, and an ultraviolet sensor for measuring an irradiation amount of the ultraviolet lamp, An ultraviolet irradiation device characterized in that a driver is provided in the sensor.   In the ultraviolet irradiation apparatus comprising a water pipe having an inlet and an outlet of water to be treated, an ultraviolet lamp disposed in the water pipe, and an optical sensor for measuring an irradiation amount of the ultraviolet lamp, An ultraviolet irradiation device, wherein a quartz glass coated with a fluorescent material is provided between a lamp and the optical sensor.

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