JP2011050830A - Ultraviolet irradiation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an ultraviolet irradiation device which can continuously monitor the ultraviolet irradiation state inside the device, can individually monitor all ultraviolet lamps disposed inside the device, and can reduce the deterioration of an ultraviolet monitor. <P>SOLUTION: The ultraviolet irradiation device 1 which performs the sterilization, disinfection and inactivation of microorganisms in water and sewage treatment, includes a first ultraviolet monitor 17 which continuously monitors the ultraviolet irradiation state inside the ultraviolet irradiation device 1, and a second ultraviolet monitor 18<SB>1</SB>, 18<SB>2</SB>for monitoring lamp capacity which individually monitors the capacities of ultraviolet lamps 7a-7f for radiating ultraviolet rays into the ultraviolet irradiation device 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ultraviolet irradiation device using ultraviolet rays, and more particularly to an ultraviolet irradiation device that sterilizes, disinfects, and inactivates microorganisms in water and sewage treatment.

  As is well known, chemicals such as ozone and chlorine are used to sterilize and disinfect water and sewage, deodorize and decolorize industrial water, bleach pulp, and sterilize medical equipment.

  In the conventional disinfecting apparatus, a stirrer such as a retention tank or a spray pump is indispensable for uniformly dissolving ozone and chemicals in treated water. Therefore, it was not possible to respond immediately to changes in water quality and quantity. Ultraviolet rays have actions such as sterilization / disinfection / decolorization, deodorization / decoloration of industrial water, or bleaching of pulp, and ultraviolet treatment is performed in order to immediately respond to changes in water quality and quantity of water. In particular, in an ultraviolet irradiation device that sterilizes, disinfects, and inactivates water and sewage, when ultraviolet rays are used, they are sterilized, disinfected, and inactivated within a few seconds of irradiation with ultraviolet rays. For this reason, in order to monitor the maintenance of the capability, it is necessary to grasp an accurate ultraviolet ray irradiation amount. However, the ultraviolet lamp has a problem in that the amount of ultraviolet radiation is attenuated by the accumulated lighting time even with the same electric input.

  Furthermore, it is difficult to determine whether the decrease in the amount of ultraviolet irradiation is due to a decrease in the ultraviolet transmittance of the fluid to be treated, the aging of the ultraviolet lamp, or the deterioration of the ultraviolet monitor. Accordingly, monitoring is not sufficient with only one UV monitor, and it is necessary to monitor changes in the performance of individual UV lamps built in the UV irradiation device. In addition, there is a problem that it is necessary to reduce the deterioration of the ultraviolet monitor mounted for that purpose.

  As means for solving the above problems, a method of constantly monitoring the effective irradiation amount in the ultraviolet irradiation apparatus is known. In this method, a protective tube having ultraviolet transparency is arranged in the center of a circle in which a plurality of ultraviolet lamps are arranged in the ultraviolet treatment tank, and both ends are arranged in the treatment tank, and a wavelength conversion element is inserted into the protective tube. In this method, the wavelength conversion elements are arranged at a distance from each other so that each ultraviolet lamp can be seen (for example, Patent Document 1). In addition, a method for individually monitoring the ability of an ultraviolet lamp installed in an ultraviolet irradiation device is known. For example, a method of attaching a UV sensor in one-to-one with an UV lamp (for example, Non-Patent Document 1), or a method of exposing a part of the light emitting part of the UV lamp outside the apparatus and attaching a UV monitor to the exposed part. (Patent Document 2) has been proposed. Furthermore, a method for preventing the performance deterioration of the ultraviolet monitor is known. For example, a method of reducing the total exposure to the ultraviolet monitor by attaching a shutter between the ultraviolet lamp and the ultraviolet monitor light receiving unit to monitor intermittently (for example, Patent Document 3), or an ultraviolet lamp and an ultraviolet ray. A method of attaching a shielding object such as a valve between monitors (for example, Patent Document 4) has been proposed.

Japanese Patent No. 4168348 JP 2005-334756 A JP 2005-279434 A JP 2005-52760 A

Water Technology Center, “Ultraviolet Irradiation Equipment JWRC Technical Examination Standard (Medium Pressure Lamp)”, issued on August 1, 2008.

  However, the above-described Patent Document 1 has a problem in that it is not possible to monitor the state of each ultraviolet lamp installed in the ultraviolet irradiation device. In Patent Document 2 and Non-Patent Document 1, there is a problem that the ultraviolet irradiation state in the ultraviolet irradiation apparatus cannot be monitored, and an ultraviolet monitor light receiving unit is installed in the vicinity of the ultraviolet lamp. There is a problem of bringing about. Further, in Patent Document 3 and Patent Document 4, there is a problem that not only the irradiation state in the ultraviolet irradiation device cannot be constantly monitored but also the state of each lamp cannot be grasped.

  The present invention has been made in view of the above circumstances, and can constantly monitor the ultraviolet irradiation state inside the apparatus, and can individually monitor the capabilities of all the ultraviolet lamps arranged in the apparatus. An object of the present invention is to provide an ultraviolet irradiation device capable of reducing deterioration of a monitor.

  The ultraviolet irradiation apparatus according to the first invention of the present application is a first ultraviolet monitor for constantly monitoring the ultraviolet irradiation state in the ultraviolet irradiation apparatus in the ultraviolet irradiation apparatus for sterilizing, disinfecting and inactivating microorganisms in water and sewage treatment. And a second ultraviolet ray monitor for monitoring the lamp capacity for individually monitoring the ability of the ultraviolet lamp for irradiating the ultraviolet ray in the ultraviolet ray irradiation device.

  The ultraviolet irradiation apparatus according to the second invention of the present application is an ultraviolet irradiation apparatus for sterilizing, disinfecting and inactivating microorganisms in water and sewage treatment, and a first ultraviolet monitor for constantly monitoring the ultraviolet irradiation state in the ultraviolet irradiation apparatus. And a second ultraviolet monitor for monitoring the lamp performance for individually monitoring the ability of the ultraviolet lamp to irradiate the ultraviolet rays in the ultraviolet irradiation device, the second ultraviolet monitor being parallel to the ultraviolet lamp. A fixed fixing is made on the inner wall of the quartz glass tube installed by shifting the number of monitoring holes in the direction of the monitoring target ultraviolet lamp in the direction of the quartz glass axis so that there is only one monitoring hole on the same circumference. A cylinder, an ultraviolet intensity sensor having a dome-shaped light receiving portion, installed inside the fixed tube, and arranged to cover the dome-shaped light receiving portion; Pump in the same number as, and wherein the large light guide holes of the hole diameter than drilled monitoring hole in the fixed tube is provided with a cylindrical cap opened.

According to the present invention, the first ultraviolet sensor for constantly monitoring the ultraviolet irradiation state in the ultraviolet irradiation device and the light source for irradiating the ultraviolet ray in the ultraviolet irradiation device are arranged, and the capability of the ultraviolet lamp is individually monitored. Therefore, by installing the second ultraviolet sensor for monitoring the lamp capacity, it is possible to provide an ultraviolet irradiation apparatus capable of accurately monitoring the capacity of the ultraviolet irradiation apparatus.
Further, according to the present invention, even when a lamp having a high ultraviolet emission intensity is used, the intensity of the ultraviolet light received by the light receiving part of the ultraviolet lamp can be reduced, so that the deterioration of the ultraviolet sensor light receiving part can be reduced. .

In addition to the UV sensor for monitoring the UV irradiation status in the UV irradiation device, an UV sensor is installed to monitor the performance of each UV lamp. It is possible to provide an ultraviolet irradiating device that can simultaneously meet the demand for monitoring of the above.
Furthermore, since a plurality of ultraviolet lamps can be monitored by one ultraviolet sensor, it is possible to provide an ultraviolet irradiation apparatus that can reduce the manufacturing cost, maintenance cost, and power cost of the ultraviolet irradiation apparatus.

The block diagram which shows the ultraviolet irradiation device incorporating the ultraviolet monitor by the 1st Embodiment of this invention. Sectional drawing which follows the XX line of FIG. Explanatory drawing of the washing | cleaning board which is one structure of the ultraviolet irradiation device of FIG. The schematic diagram which shows the connection state of the ultraviolet monitor for lamp | ramp monitoring which is one structure of the ultraviolet irradiation device of FIG. 1, and the washing | cleaning plate drive mechanism. The schematic diagram which shows the fixed cylinder of the ultraviolet ray monitor for lamp capability monitoring which is one structure of the ultraviolet irradiation device of FIG. The schematic diagram which shows the movable cylinder of the ultraviolet ray monitor for lamp capability monitoring which is one structure of the ultraviolet irradiation device of FIG. The schematic diagram which shows an example of an ultraviolet-ray intensity sensor. The block diagram which shows the system configuration | structure of the ultraviolet monitor of the ultraviolet irradiation device of FIG. The graph which shows the ultraviolet sensor output of the ultraviolet monitor for lamp capacity monitoring. The graph which shows the time change of the UV intensity sensor output of the UV monitor for lamp capacity monitoring. The schematic diagram for demonstrating the method of determining the hole diameter of a monitoring hole. Sectional drawing of the ultraviolet irradiation device incorporating the ultraviolet monitor by 2nd Embodiment of this invention. The schematic diagram which shows the movable cylinder by 2nd Embodiment. The schematic diagram which shows the ultraviolet monitor for lamp | ramp monitoring by 2nd Embodiment of the ultraviolet monitor of the ultraviolet irradiation device which concerns on this invention. The schematic diagram which shows the ultraviolet monitor for lamp | ramp monitoring by 3rd Embodiment of the ultraviolet monitor of the ultraviolet irradiation device which concerns on this invention. The schematic diagram which shows the fixed cylinder by 3rd Embodiment.

Next, the ultraviolet irradiation apparatus according to the embodiment of the present invention will be described in detail.
(First embodiment)
An ultraviolet irradiation apparatus according to a first embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a plan view showing an ultraviolet irradiation device incorporating an ultraviolet monitor, and FIG. 2 is a cross-sectional view along the XX direction of FIG. 3A and 3B are explanatory views of a cleaning plate incorporated in the ultraviolet irradiation apparatus of FIG. 1, FIG. 3A is a plan view, and FIG. 3B is FIG. It is sectional drawing which follows the XX line of A). FIG. 4 is a schematic view showing a connection state between the lamp monitoring ultraviolet monitor and the cleaning plate driving mechanism by the ultraviolet irradiation device of FIG. FIG. 5 is a schematic diagram showing a fixed cylinder which is one configuration of the lamp monitoring ultraviolet monitor, and FIG. 6 is a schematic diagram showing a movable cylinder which is one configuration of the lamp monitoring ultraviolet monitor. FIG. 7 is a schematic diagram of an ultraviolet intensity sensor which is one configuration of the lamp monitoring ultraviolet monitor. FIG. 8 is a block diagram showing a system configuration of an ultraviolet monitor of the ultraviolet irradiation device.

  Reference numeral 1 in FIG. 1 denotes an ultraviolet irradiation device, a cylinder 3 through which water 2 to be treated flows, and a lamp housing having the same tube diameter as that of the cylinder 3, which is joined to the cylinder 3 at the center of the cylinder 3. 4 is provided. The treated water 2 flows from the left side in FIG. 1 and is discharged to the right side as treated water 5 that has been irradiated with ultraviolet rays in the apparatus. The lamp housing 4 has a lamp sleeve 6a, 6b, 6c, 6d, 6e, 6f made of quartz glass tube, and ultraviolet lamps 7a, 7b, 7c, 7d, 7e, 7f inserted therein. Six sets are installed at equal intervals.

Both end portions of the lamp sleeve 6a~6f containing the above ultraviolet lamp 7a~7f, the lamp housing lid ₈ 1, _{8 2} watertight O-ring (not shown) to the O-ring presser 9 (9a, 9b, 9e, 9f), 10 (10a, 10b, 10e, 10f) is water-sealed. Further, the ultraviolet irradiation device includes a cleaning plate driving shaft 11, a driving screw 12, a driving motor 13, a cleaning plate 14, lamp sleeve wipers 15a, 15b, 15c, 15d, 15e, 15f installed at the center of the lamp housing 4. In addition, a cleaning device including the lamp monitoring tube wipers 16a and 16b is incorporated. In addition, a continuous monitoring ultraviolet monitor (first ultraviolet monitor) 17 for constantly monitoring the ultraviolet irradiation state inside the ultraviolet irradiation apparatus 1 at the center of the cross of the cylinder 3 of the ultraviolet irradiation apparatus 1 and the lamp housing 4. Is installed.

Inside the ultraviolet irradiating device 1, lamp performance monitoring ultraviolet monitors (second ultraviolet monitors) 18 (18 ₁ , 18 ₂ ) are installed on the left and right sides of the center of the lamp housing 4, respectively. Each of the monitors 18 ₁ and 18 ₂ is built in a quartz glass tube (protection tube) 19 from the outside in the order of a fixed tube 20, a movable tube 21, and an ultraviolet intensity sensor 22. That is, the lamp capacity monitoring ultraviolet monitor 18 _1, lamp housing 4 from the tube axis left ultraviolet lamps 7a, 7b, 7c were monitored, lamp capacity monitoring ultraviolet monitor 18 _2, right ultraviolet lamp 7d, 7e , 7f.

Next, the structure of the second ultraviolet monitor for monitoring the lamp capacity will be described in more detail with reference to FIGS. 4, 5, 6, and 7. FIG. 4, ₁ second ultraviolet monitor 18 includes a lamp monitoring pipe 23 constituted by the fixed barrel 20 and the movable cylinder 21 made of light shielding material, a UV intensity sensor 22, and a support member 25. Here, the fixed cylinder 20 is inserted and fixed to the inner wall of the quartz glass tube 19 installed in parallel with the ultraviolet lamp 7. Further, the fixed cylinder 20 has monitoring holes 24 ₁ , 24 ₂ , and 24 _{3 having} hole diameters d ₁ , d ₂ , and d ₃ , respectively, which are determined in the relationship to be described later, in the direction of the monitoring target ultraviolet lamp. Is opened. The movable cylinder 21 is disposed inside the fixed cylinder 20.

The movable cylinder 21 is provided with one light guide hole 26 having a diameter larger than the monitoring holes 24 ₁ , 24 ₂ , and 24 ₃ of the fixed cylinder 20. A movable cylinder drive shaft 27 for rotating the movable cylinder 21 is connected to the movable cylinder 21. The ultraviolet intensity sensor 22 having the light receiving portion 28 at the tip is set at a predetermined position by the support member 25 at a position where the central axis of the lamp monitoring tube 23 and the central axis of the light receiving portion 28 coincide with each other and does not contact the inner surface of the movable cylinder 21. Has been. The movable cylinder drive shaft 27 is connected to a movable cylinder drive coupling gear 29. The movable cylinder drive connecting gear 29 is meshed with a power gear 31 fixedly installed on the cleaning plate drive shaft 30.

Next, a block diagram showing a system configuration of the ultraviolet monitor of the ultraviolet irradiation device will be described with reference to FIG. In FIG. 8, the outputs of the second ultraviolet monitor 18 for lamp monitoring and the first ultraviolet monitor 17 for constant monitoring are obtained by converting current data (mA) output from the ultraviolet intensity sensor monitor 32 into ultraviolet illuminance (mW / cm ² ) and output to the arithmetic unit. In addition, a rotational speed counter 33 is connected to the drive motor 13, where the rotational speed of the drive motor 13 is counted and output to the arithmetic unit 34. In the calculation device 34, the output value of the ultraviolet intensity sensor output monitor 32 and the output value of the rotation number counter 33 are associated, recorded in the recording device 35, and output to the controller 36. In addition, the number 37 in FIG. 8 shows the central monitoring apparatus of a processing field.

The controller 36 determines from the data of the first ultraviolet monitor 17 whether the ultraviolet irradiation state in the ultraviolet irradiation apparatus 1 is excessive or insufficient from preset determination conditions. Further, the present value of the data of the second ultraviolet monitor 18 and the recorded data in the recording device 35 are referred to and compared with the output data value at the start of monitoring, and the ultraviolet intensity sensor corresponding to the output of the monitored ultraviolet lamp. The difference between the output value and the value corresponding to the output value of the UV intensity sensor corresponding to the lower limit determined at the time of designing the UV irradiation device 1 is 100%, and the UV intensity sensor output value at the start of monitoring and the current UV intensity sensor output value The difference between the UV intensity sensor output value corresponding to the output of the UV lamp 7 and the UV intensity sensor output corresponding to the UV irradiation device design lower limit value is compared with a preset allowable lower limit value i _lim. Are output to the controller 36.

Next, the operation of the ultraviolet monitor of the ultraviolet irradiation device configured as described above will be described.
The treated water 2 containing pathogenic microorganisms to be treated flows into the ultraviolet irradiation device 1 from the left side of FIG. 1 and is irradiated with ultraviolet rays from the ultraviolet lamp 7 built in the lamp sleeve 6 installed in the lamp housing 4. receive. As a result, part of the DNA of the pathogenic microorganism is damaged and inactivated (pathogenicity disappeared), and the treated water 5 flows out to the right in FIG. A UV monitor 17 for constant monitoring is installed at the center of the cross joint between the cylinder 3 and the lamp housing 4 of the UV irradiation device 1, and the UV irradiation state inside the UV irradiation device 1 is constantly monitored. Further, the lamp housing 4 is provided with two sets of _second ultraviolet monitors 18 ₁ and 18 ₂ for monitoring the lamp capacity, and individually monitors the change in capacity of each ultraviolet lamp.

FIG. 9 shows the relationship between the UV intensity by the second UV monitor for lamp capacity monitoring and the rotational speed of the drive motor. In FIG. 9, symbols a, b, and c indicate output value data of the ultraviolet lamps 6a, 6b, and 6c, respectively. FIG. 10 shows an example of the relationship between the capacity maintenance rate (%) of the ultraviolet lamp and the irradiation time. In FIG. 10, curves a, b, and c indicate the capability maintenance rates of the ultraviolet lamps 6a, 6b, and 6c, respectively. FIG. 11 is a schematic diagram for explaining a method of determining the hole diameters of the monitoring holes 24 ₁ , 24 ₂ , and 24 ₃ .
First, the basic knowledge of ultraviolet radiation will be explained.
When ultraviolet light passes through the water from the light source position and reaches an arbitrary point, the ultraviolet intensity at the reaching point decreases in inverse proportion to the light source position and the square of the linear distance of the reaching point with respect to the ultraviolet light intensity of the light source. To do. Water also contains substances that absorb and inhibit ultraviolet rays, reducing the intensity of ultraviolet rays. Further, the outer tube of the second ultraviolet monitors 18 ₁ and 18 ₂ for monitoring the lamp capacity is a quartz glass tube 19, and the ultraviolet intensity is also reduced here.

  The method for calculating the ultraviolet intensity at an arbitrary point is as introduced in Non-Patent Document 1. In other words, it is considered that the light source of the ultraviolet lamp is connected to the point light source on the center axis of the lamp, and the transparent light model that the light is emitted uniformly from all the light sources in all directions, or the light source that radiates from any light source point. A diffused light model has been proposed in which the angle formed by the perpendicular from the lamp axis and the direction of light is θ, and is reduced by cos (θ). Here, a description will be given using a transparent light model.

Second the UV monitor 18 ₁ of the lamp capacity monitor according to the first embodiment, three UV lamps 7a at one, 7b, have been monitored to 7c, in particular, an ultraviolet lamp 7b, other UV lamps In 7a and 7c, the distance between the ultraviolet lamp and the second ultraviolet monitor 18 is greatly different. Accordingly, the intensity of ultraviolet rays reaching the second ultraviolet monitor is also greatly different. In this state, it will be set in accordance with the strongest intensity measurement span of ultraviolet intensity sensor 22 built in the second ultraviolet monitor 18 _1, the distance from the UV monitor to monitor the accuracy of the far UV lamp decreases End up. Therefore, in order to accurately monitor the change in the performance of each lamp, it is desirable that the UV intensity reaching the light receiving unit 28 of the UV intensity sensor 22 be equal. Therefore, the diameter of the monitoring hole opened in the fixed tube 20 of the second ultraviolet monitor according to the first embodiment is set to d ₁ as the monitoring hole 24 ₁ having the shortest distance from the lamp to be monitored. determining the 24 _2, 24 ₃ each having a pore diameter of _d 2, _{d 3.}

In FIG. 11, the hole diameter d ₁ of the monitoring hole 24 ₁ is the vertical distance R ₁ from the point P, which is the surface portion of the light receiving unit 28, to the center line (CL) of the ultraviolet lamp 7 b, and is incident on the monitoring light 24 ₁ . Using the distance I from the emission point range (viewing angle range) length I ₁ and the point P to the outer surface of the fixed cylinder 20, the following equation (1) can be used.

Similarly, the hole diameter d ₂ (same for d ₃ ) of the monitoring hole 24 ₂ (same for 24 ₃ ) is incident on the monitoring hole 24 ₂ and the vertical distance R ₂ from the point P to the central axis of the ultraviolet lamp 7a or 7c. Using the ultraviolet ray emission point range (viewing angle range) length I ₂ , the following equation (2) can be used.

Further, the center line C.V. L. Assuming that the ultraviolet intensity passing through the monitoring hole 24 ₁ having the hole diameter d ₁ from the upper point X and reaching the point P of the light receiving portion of the ultraviolet intensity sensor is I ₁ (mW / cm ² ), the ultraviolet intensity I ₁ is It can be calculated by equation (3).

Here, f _Q1 is an ultraviolet transmission coefficient of the lamp sleeve 6b, f _Q2 is an ultraviolet transmission coefficient of the quartz glass tube 19 of the second ultraviolet monitor 18 for monitoring the lamp capacity, S is an ultraviolet output (W) of the ultraviolet lamp, L Is the length (cm) of the light emitting portion of the ultraviolet lamp 7, α _w is the ultraviolet transmission ratio of the water to be treated, and q is the radius of the lamp sleeve 6.

Similarly, ultraviolet intensity I ₂ that reaches the monitor hole 24 2 or through the monitoring hole 24 ₃ UV intensity sensor light receiving portion _28, can be calculated from the following equation (4) Expression 4.

From the above relation, in order to determine the hole diameter _{d 2} of the monitoring holes 23 _2, first, (3), (4) from equation _obtains the _{I 2} such that I 1 = _{I 2,} the _{I 2} ( 2) Substituting into the equation, d ₂ may be obtained.

Incidentally, in the first embodiment, the second UV monitor 18 ₁ of the lamp capacity monitoring ultraviolet lamp 7a, a distance of 7c may be set to _d 2 = _{d 3} is equal. Also, the pore diameter of the second ultraviolet monitor 18 _second monitoring hole of the lamp capacity monitoring can also be determined in a similar manner.

Next, the procedure of the monitoring operation of the second ultraviolet monitor for monitoring the lamp capacity according to the first embodiment will be described.
First, as shown in FIG. 2, a cleaning plate 14 is attached to the ultraviolet irradiation device 1 for the purpose of preventing the organic substance or inorganic substance contained in the water to be treated from accumulating on the surface of the lamp sleeve and hindering the transmission of ultraviolet rays. It has been. The cleaning plate 14 is configured to reciprocate in parallel with the lamp sleeve by a cleaning plate drive shaft 11, a drive screw 12, and a drive motor 13. A power gear 31 is attached to the outer side of the ultraviolet irradiation device 1 of the cleaning plate drive shaft 11. As described above, the movable gear drive gear 29 of the second ultraviolet monitor 18 for monitoring the lamp capacity is engaged with the power gear 31. The lamp sleeve cleaning device is set to operate at a predetermined time interval, and when the drive motor 13 rotates, the movable cylinder drive gear 29 connected to the drive gear also rotates to rotate the movable cylinder 21. When the position of the monitoring hole opened in the fixed cylinder 20 coincides with the position of the light guide hole opened in the movable cylinder 21 while the movable cylinder 21 rotates, it passes through the monitoring hole 24 and the light guide hole 26. Then, the ultraviolet rays reach the light receiving part 28 of the ultraviolet intensity sensor 22, and the ultraviolet intensity is measured.

  Here, the gear ratio between the power gear 31 and the movable cylinder drive gear 29 is rotated once around the installation position of the ultraviolet sensor 22 while the cleaning plate 14 moves from one end of the lamp sleeve to the other end. Set as follows. As a result, if the cleaning operation is performed once, that is, if the cleaning plate 14 is set to reciprocate once from end to end of the lamp sleeve 6, it is possible to monitor the lamp capacity once.

  The output value of the ultraviolet intensity sensor 22 at this time is a continuous square wave as shown in FIG. 9, but by examining the rotational speed of the drive motor 13 and the position of the cleaning plate 14 in advance, The intensity sensor output can be associated with the monitoring target lamp position at that time.

(effect)
According to the first embodiment, it is possible to constantly monitor the entire ultraviolet irradiation state in the ultraviolet irradiation device and to monitor the ultraviolet output capability of each ultraviolet lamp arranged in the ultraviolet irradiation device. As a result, it is possible to accurately monitor the performance of each ultraviolet lamp and the shortage of the amount of ultraviolet irradiation caused by the reduced capability. Therefore, it is possible to prevent the spread of infection caused by the survival of microorganisms that retain pathogenicity in the treated water due to the shortage of ultraviolet irradiation. Therefore, the reliability of the ultraviolet irradiation device is improved, and safe treated water can be provided.

  Further, according to the first embodiment, when a plurality of ultraviolet lamps are monitored by one lamp capacity monitoring second ultraviolet monitor, the difference between the monitoring target ultraviolet lamp and the lamp capacity monitoring ultraviolet monitor is different. By changing the hole diameter of the monitoring hole, the difference in the ultraviolet intensity to the UV light intensity sensor light receiving part due to is all equal. Therefore, the measurement span value of the ultraviolet intensity sensor can be set within a narrow range, the measurement accuracy is increased, and the lamp performance can be monitored with high reliability.

  Further, according to the first embodiment, the intensity of ultraviolet rays reaching the light receiving portion of the ultraviolet intensity sensor is limited by the monitoring hole, and further, intense ultraviolet irradiation or continuous for a long time for monitoring at a predetermined time interval. It is possible to prevent deterioration due to the exposure limit value being exceeded in a short time of the light receiving portion of the ultraviolet intensity sensor due to irradiation. As a result, the lamp capacity can be monitored stably for a long time.

  Furthermore, since the cleaning device drive motor is used as the power for rotating the possible tube of the second ultraviolet monitor, a special drive device for driving the movable tube is not required. Furthermore, by checking the number of rotations of the drive motor and the position of the cleaning plate in advance, the output of the UV intensity sensor can be associated with the position of the lamp to be monitored at that time, and the UV lamps can be monitored individually and their capacity changes. Is possible.

(Second Embodiment)
Next, an ultraviolet irradiation device according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same member as FIGS. 1-11 attaches | subjects the same number, and abbreviate | omits description.
(Constitution)
In contrast to the first embodiment, the second embodiment uses a reciprocating drive cylinder 40 as the driving power of the movable cylinder 21, which is a component of the second ultraviolet monitors 18 ₁ and 18 ₂ for monitoring the lamp capacity. The difference is that the moving direction of the movable cylinder 21 is a reciprocating motion that moves in parallel. Other configurations are the same as those in FIG. 1 of the first embodiment. Reciprocating drive cylinder 40 is fixedly installed to the lamp housing cover ₈₂ of the lamp capacity monitoring monitors axis position.

Next, the configuration of the ultraviolet irradiation apparatus according to the second embodiment will be described in more detail with reference to FIGS. 13 and 14. Here, FIG. 13 is a schematic view showing a second ultraviolet monitor for lamp monitoring of the ultraviolet irradiation device. FIG. 14 is a schematic diagram showing a fixed cylinder according to the second embodiment.
In FIG. 13, the fixed cylinder 20 built in the second ultraviolet monitor 18 is set to predetermined hole diameters d ₁ , d ₂ , and d ₃ on the circumference that coincides with the position of the light receiving portion 28 of the ultraviolet intensity sensor 22. The monitored holes 24 ₁ , 24 ₂ , 24 ₃ are opened. The movable cylinder drive shaft 27 of the movable cylinder 21 is connected to a reciprocating drive cylinder 40 which is fixedly mounted to the lamp housing cover _82. Furthermore, as shown in FIG. 14, the Kakushirubekoana _{26 1,} 26 2, 26 _3, respectively, are spaced apart _L 2, _{L 3} in the axial direction.

(Function)
Next, the operation of the ultraviolet monitor of the ultraviolet irradiation device in FIG. 2 will be described.
When the reciprocating drive cylinder 40 operates, the movable cylinder 21 connected to the reciprocating drive cylinder 40 by the movable cylinder drive shaft 27 starts to move in parallel. When the position of the monitoring hole 24 opened in the fixed cylinder 20 and the position of the light guide hole 26 opened in the movable cylinder 21 reach a point where the movable cylinder 21 moves in parallel, the monitoring hole 24 and the guiding hole 24 are guided. The ultraviolet rays pass through the light hole 26 and reach the light receiving unit 28 of the ultraviolet intensity sensor 22, and the ultraviolet intensity is measured.

(effect)
In the second embodiment, the same effect as in the first embodiment can be obtained, and a dedicated reciprocating drive cylinder 40 is attached as a driving device for the movable cylinder 23 of the second ultraviolet monitor 18 for lamp monitoring. Therefore, since the lamp capacity monitoring operation time interval can be set freely, the lamp capacity monitoring capacity can be improved.

(Third embodiment)
Next, an ultraviolet irradiation apparatus according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 15 is a configuration diagram of an ultraviolet monitor of the ultraviolet irradiation apparatus according to the third embodiment. The same members as those in FIGS. 1 to 14 are denoted by the same reference numerals, and description thereof is omitted.
The third embodiment is different from the first and second embodiments in that the number of monitoring target lamps is the same as the number of monitoring target lamps in the direction of the monitoring target ultraviolet lamp on the inner wall of the quartz glass tube 19 installed in parallel with the ultraviolet lamp. The monitoring holes 24 ₁ , 24 ₂ , and 24 ₃ set to the hole diameters d ₁ , d ₂ , and d ₃ are opened at intervals of L ₂ and L _{3 in} the axial direction so that only one is provided on the same circumference. The fixed cylinder 20 is fixedly installed, and an ultraviolet intensity sensor 22 having a dome-shaped light receiving portion 28 is installed therein. Further, the light receiving portion 28 of the ultraviolet intensity sensor 22 has a cylindrical shape in which light guide holes 26 having the same number as the monitoring target lamps and having a larger diameter than the monitoring holes 24 formed in the fixed cylinder 20 are formed on the same circumference. The cap 41 is put on. The end of the ultraviolet intensity sensor support member 25 that holds the ultraviolet intensity sensor 22 is connected to the reciprocating drive cylinder 40 and is configured to reciprocate in the horizontal direction.

(Function)
Next, the operation of the ultraviolet monitor of the ultraviolet irradiation device will be described.
When the reciprocating drive cylinder 40 is operated, the ultraviolet intensity sensor support member 25 connected to the movable part of the reciprocating drive cylinder 40 and the ultraviolet intensity sensor 22 held thereby start to move in parallel. When the position of the monitoring hole opened in the fixed cylinder 20 and the position of the light guide hole 26 opened in the cylindrical cap 41 reach the point where the ultraviolet intensity sensor 22 moves in parallel, the monitoring hole 23 and the guiding hole 23 are guided. The ultraviolet rays pass through the light hole 26 and reach the light receiving portion 25 of the ultraviolet intensity sensor 22, and the ultraviolet intensity is measured.

(effect)
In the third embodiment, the same effects as those of the second embodiment can be obtained, and the movable cylinder, which is a component of the second ultraviolet monitor 18 for lamp capacity monitoring, is not necessary. Since there is no more misalignment of the shaft to be driven and the driving accompanying this, more reliable and accurate monitoring of the UV lamp performance can be realized.

  In the above embodiment, as the structure of the ultraviolet irradiation device, the structure in which the ultraviolet lamp is arranged in the direction orthogonal to the flow of the fluid to be processed has been shown as an example. The structure is not limited at all, and the same effect can be obtained when an ultraviolet lamp is installed parallel to the flow. Further, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Ultraviolet irradiation apparatus, 2 ... Treated water, 3 ... Cylinder, 4 ... Lamp housing, 5 ... Treated water, 6a, 6b, 6c, 6d, 6e, 6f ... Lamp sleeve, 7a, 7b, 7c, 7d, 7e , 7f ... UV lamp, 8 ₁ , 8 ₂ ... Lamp housing lid, 9a, 9b, 9c, 9d, 9e, 9f, 10a, 10b, 10c, 10d, 10e, 10f ... O-ring press, 11 ... Cleaning plate drive shaft , 12 ... drive screw, 13 ... drive motor, 14 ... cleaning plate, 15a, 15b, 5c, 15d, 15e, 15f ... lamp sleeve wiper, 16a, 16b ... lamp monitor tube wiper, 17 ... second for constant monitoring UV monitor, ₁₈ 1, 18 2 _... lamp capacity second ultraviolet monitor for monitoring, 19 ... a quartz glass tube (protective tube), 20 ... fixed cylinder, 21 ... movable cylinder, 22 ... ultraviolet Degree sensor, 23 ... lamp monitoring _tube, 24 1, ₂₄ 2, 24 3 _... monitoring hole, 25 ... support _member, 26, 26 1, ₂₆ 2, 26 3 _... light guide holes, 27 ... movable cylinder drive shaft, 28 ... Light receiving section 29 ... movable cylinder drive connection gear 28 ... movable cylinder drive connection gear 31 ... UV intensity sensor monitor 32 ... rotation speed counter 33 ... calculation device 34 ... recording device 35 ... controller 37 ... processing field Central monitoring device, 40 ... reciprocating drive cylinder, 41 ... cylindrical cap.

Claims (15)

In ultraviolet irradiation equipment that disinfects, disinfects, and inactivates microorganisms in water and sewage treatment,
A first ultraviolet monitor for constantly monitoring the ultraviolet irradiation state in the ultraviolet irradiation apparatus, and a second for monitoring the lamp capacity for individually monitoring the ability of the ultraviolet lamp to irradiate ultraviolet rays in the ultraviolet irradiation apparatus. An ultraviolet irradiation device comprising an ultraviolet monitor. The second ultraviolet monitor is fixedly installed on the inner wall of a protective tube installed in parallel with the ultraviolet lamp, and has a fixed cylinder in which the same number of monitoring holes as the number of monitoring lamps are opened in the direction of the monitoring target ultraviolet lamp; A light guide hole having a diameter larger than the monitoring hole of the fixed tube is formed inside the fixed tube, and an ultraviolet lamp monitoring tube configured by a movable tube that is rotated by a driving device, and the center of the ultraviolet lamp monitoring tube The ultraviolet irradiation device according to claim 1, further comprising an ultraviolet intensity sensor installed at a position where the axis coincides with the central axis of the light receiving unit and does not contact the inner surface of the movable cylinder. The monitoring hole of the fixed cylinder is opened on the circumference that coincides with the light receiving portion of the ultraviolet intensity sensor, and the light guide hole of the movable cylinder is opened on the circumference that coincides with the monitoring hole. The ultraviolet irradiation device according to claim 2. 4. The ultraviolet irradiation device according to claim 2, further comprising a reciprocating drive device for reciprocating the movable cylinder. The monitoring hole of the fixed cylinder is opened on a circumference that coincides with the light receiving portion of the ultraviolet intensity sensor, and the light guide hole of the movable cylinder is opened on a circumference that coincides with the monitoring hole. In addition, when having a plurality of light guide holes, the positions of the individual light guide holes are shifted in the reciprocating direction so that the plurality of light guide holes are not on the same circumference. The ultraviolet irradiation device according to claim 4. In the case where a plurality of ultraviolet lamps are to be monitored, the ultraviolet intensity at the light receiving portion of the ultraviolet intensity sensor is the same with respect to the monitoring hole diameter d ₁ where the monitoring hole of the fixed tube is closest to the monitoring target lamp. As described above, one or more monitoring hole diameters d _n (n is a positive integer of 2 or more) for monitoring other ultraviolet lamps are formed. The ultraviolet irradiation device described. The second ultraviolet monitor has a dome-shaped light receiving portion at the tip, and a 360 ° field of view in the circumferential direction around the sensor axis from the bottom of the dome-shaped light receiving portion to the hemispherical portion opposite to the bottom. The ultraviolet irradiation device according to claim 1, wherein an ultraviolet intensity sensor having angular characteristics is incorporated. In ultraviolet irradiation equipment that disinfects, disinfects, and inactivates microorganisms in water and sewage treatment,
A first ultraviolet monitor for constantly monitoring the ultraviolet irradiation state in the ultraviolet irradiation apparatus, and a second for monitoring the lamp capacity for individually monitoring the ability of the ultraviolet lamp to irradiate ultraviolet rays in the ultraviolet irradiation apparatus. Equipped with a UV monitor,
The second ultraviolet monitor has only one monitoring hole on the same circumference on the inner wall of the protective tube installed in parallel with the ultraviolet lamp in the direction of the monitoring ultraviolet lamp. The fixed cylinder opened by shifting in the direction of the protective tube axis, the ultraviolet intensity sensor having a dome-shaped light receiving portion installed inside the fixed tube, and the dome-shaped light receiving portion are arranged to cover the same. An ultraviolet irradiation apparatus comprising a cylindrical cap having light guide holes, the number of which is the same as the number of lamps to be monitored, and having a larger hole diameter than the monitoring holes formed in the fixed cylinder. The ultraviolet intensity sensor is supported by a support that can fix and move the ultraviolet intensity sensor, and the support is attached by a fixture attached to one end of the quartz glass tube. A disc is attached to the fixed end of the support so that the plate surface is perpendicular to the center of the axis of the UV intensity sensor, and the disc is angled. The ultraviolet irradiation device according to claim 1. A cleaning device installed inside the device for cleaning the surface of the lamp sleeve that protects the UV lamp, and a drive motor for automatically driving the cleaning device are further provided, and the movable cylinder of the UV monitor device or the UV intensity The drive shaft for driving the sensor is connected via a gear coupled to the rotation shaft of the drive motor, and is driven in accordance with the operation of the drive motor. , 7, 8, or 9. When the movable cylinder rotates while the cleaning device moves from one end to the other end of the lamp sleeve, the movable cylinder reciprocates once around the ultraviolet intensity sensor installation position. 11. The ultraviolet ray according to claim 10, wherein a gear ratio of a gear connecting the cleaning device drive shaft and the movable cylinder drive shaft is set so as to operate for one way of a movable range. Irradiation device. The operation start point of the movable tube of the ultraviolet monitor or the movable ultraviolet intensity sensor is attached to the monitoring hole position for receiving the ultraviolet light of one of the lamps to be monitored and the movable hole, or the ultraviolet sensor light receiving unit. The ultraviolet irradiation device according to claim 10 or 11, characterized in that the positions of the light guide holes of the cylindrical cap formed coincide with each other. Rubbing the outer surface of the protective tube of the second ultraviolet monitor, a cleaning wiper is provided to prevent the organic or inorganic substances contained in the fluid to be treated from adhering to or deposited on the outer surface of the protective tube. The ultraviolet irradiating device according to claim 1, wherein the cleaning wiper is attached to a cleaning device for a lamp sleeve containing the ultraviolet lamp and operates in accordance with the operation of the cleaning device. The ultraviolet light intensity sensor is connected to a recording device for recording the ultraviolet light output of the ultraviolet light intensity sensor, and the output order of the ultraviolet light output and the monitoring order of the monitoring target ultraviolet lamp are associated in advance. Item 15. The ultraviolet irradiation device according to any one of Items 2 to 14. The UV intensity sensor output value corresponding to each monitored UV lamp is compared with the output data value at the start of monitoring among the UV intensity sensor output data recorded in the UV intensity sensor output recording device. The difference between the theoretical capacity value corresponding to the output of the ultraviolet light intensity sensor corresponding to the output of the lamp and the equivalent value of the ultraviolet light intensity sensor output corresponding to the lower limit value when designing the ultraviolet irradiation device is 100%, and the output value of the ultraviolet intensity sensor at the start of the monitoring. And, the difference between the current UV intensity sensor output value is the difference between the UV intensity sensor output equivalent theoretical capacity value corresponding to the UV lamp output and the UV intensity sensor output equivalent value corresponding to the UV irradiation device design lower limit value, It is equipped with a function to output an alarm signal when it reaches a value below an arbitrarily set lower limit. UV irradiation device according to claim 14 that.

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