JP5948042B2 - UV irradiation equipment - Google Patents

Description

  The present invention relates to an ultraviolet irradiation apparatus that performs various treatments by irradiating a target fluid with ultraviolet rays. Specifically, the ultraviolet lamp arrangement of a cross-flow type ultraviolet irradiation apparatus, monitoring of the ultraviolet intensity of the ultraviolet lamp, ultraviolet intensity The present invention relates to calibration of a meter and a cleaning technique for removing dirt adhering to a lamp protection tube and a strength meter protection tube.

  The ultraviolet irradiation device irradiates the target fluid in a tank or container containing an ultraviolet lamp and irradiates the target with ultraviolet light, for example, kills or inactivates microorganisms such as bacteria contained in the target fluid such as drinking water, beverages and foods. Used for processing. In addition, ultraviolet irradiation devices are used for decolorizing target fluids such as sewage, killing or inactivating microorganisms, decomposing or synthesizing chemical substances such as organic substances, or promoting oxidation of substances contained in target fluids, TOC decomposition, semiconductors Used for the production of washing water.

For example, as shown in Table 1, a low-pressure mercury lamp or a medium-pressure mercury lamp is used as an ultraviolet lamp used for inactivating microorganisms. The low-pressure mercury lamp has a mercury sealing pressure of 2 Pa or less (usually about 0.2 to 1.6 Pa), and has high radiation efficiency of ultraviolet rays having a wavelength suitable for inactivating microorganisms of 253.7 nm. On the other hand, the medium pressure mercury lamp has a mercury filling pressure of 4 × 10 ⁴ to 4 × 10 ⁶ Pa, and its radiation efficiency at a wavelength of 253.7 nm is lower than that of the low pressure mercury lamp. However, since the medium-pressure mercury lamp can increase the power (high output), the radiation amount of the wavelength component of 253.7 nm can be sufficiently secured, and thus is used for inactivating microorganisms (for example, Non-Patent Document 1). . In the case of a low-pressure mercury lamp, it is used by being housed in a transparent lamp protection tube such as a quartz glass tube with a fluororesin coating on its outer peripheral surface. It is used without applying a fluororesin film having low properties.

  In the ultraviolet lamp, even if the electric input is the same, the ultraviolet intensity deteriorates with the cumulative lighting time. Therefore, it is necessary to monitor the UV intensity of the UV lamp and, if it deteriorates, increase the electrical input of the UV lamp using a dimmer or replace the UV lamp. Usually, the ultraviolet intensity is measured by installing a light-receiving unit of an ultraviolet intensity meter at a position where a plurality of ultraviolet lamps arranged in a cylindrical shape can be seen through the ultraviolet irradiation device.

  For example, in Patent Document 1, one ultraviolet intensity meter is disposed at a position where all the plurality of ultraviolet lamps are seen, and the total ultraviolet intensity of the plurality of ultraviolet lamps is measured and monitored. In addition, in order to individually monitor the ultraviolet intensity of each ultraviolet lamp, a single monitoring ultraviolet intensity meter is arranged at a position where a plurality of ultraviolet lamps can be seen. A single light guide hole is provided in which a light guide hole for guiding ultraviolet light to the light receiving portion is formed at a position corresponding to each ultraviolet lamp of one light shielding tube, and a UV light to be monitored is selected for the other light shielding tube. It has been proposed that a selection hole is formed, the other light shielding tube is moved, the lamp selection holes are sequentially overlapped with the respective light guide holes, and the ultraviolet intensity of each ultraviolet lamp is individually monitored.

JP 2011-50830 A

UV Disinfection Guidance Manual For the Final LT2ESWTR, US EPA, November 2006, P (2-17), Table2.1

  By the way, in the prior art, in order to increase the ultraviolet intensity in the ultraviolet irradiation region, in addition to increasing the output of the ultraviolet lamp regardless of the low pressure or the medium pressure, the number of ultraviolet lamps is increased. However, in the case of a so-called cross-flow type ultraviolet irradiation device that circulates the target fluid orthogonally to the ultraviolet lamp axis, the ultraviolet lamp emits light within the width of the channel cross section (for example, rectangular or circular) orthogonal to the target fluid. I have to keep the length.

  Moreover, in general, in the case of a large ultraviolet irradiation device, the target fluid is introduced into a cylindrical container in which an ultraviolet lamp is accommodated by a cylindrical pipe line. For this reason, among the ultraviolet lamps arranged in a cylindrical shape, the ultraviolet lamp arranged on the string of the circular arc section of the circular flow path section has a portion that deviates from the cross section of the flow path, so that the irradiation efficiency to the target fluid is reduced. Therefore, it is conceivable to secure a target ultraviolet irradiation amount using an ultraviolet lamp having a short emission length. However, when the output per light emission length is increased, for example, when one ultraviolet lamp is cut off, there is a problem that the ultraviolet irradiation amount of the entire apparatus is greatly reduced. That is, when six high-power ultraviolet lamps are provided, for example, if one ultraviolet lamp is burned out, the overall irradiation ability varies depending on the location of the lamp burned out due to the drift of water, but it is generally 5/6. There is a risk of falling to (about 83%). In order to reduce such a risk and to guarantee the apparatus performance in consideration of the deterioration of the ultraviolet lamp over time (for example, about 20%), it is conceivable to install an extra ultraviolet lamp. However, there is a problem that the running cost increases due to the extra installed ultraviolet lamp.

  As a result of studying such problems, the inventors of the present invention devised the arrangement of the ultraviolet lamps in the cross-flow type ultraviolet irradiation device, as described below, to reduce the risk when the ultraviolet lamps are burned out. In addition, it has been proposed to improve the irradiation performance (Japanese Patent Application No. 2011-234556). That is, a plurality of transparent lamp protection tubes that are distributed in the circumferential direction of a virtual cylinder that is parallel to the container axis and that has the container axis as the central axis in the cylindrical container to accommodate the ultraviolet lamps are arranged on the container axis. A so-called cross-flow type ultraviolet irradiation device configured to circulate a target fluid in a direction orthogonal to each other is configured. In particular, one or a plurality of ultraviolet lamps are accommodated in each lamp protection tube, and the ultraviolet lamps accommodated in each lamp protection tube pass through the center of the flow conduit and are perpendicular to the axis of the lamp protection tube. The positions are shifted in the direction of the protective tube axis with respect to the surface, and are installed symmetrically, for example. In addition, about one or two ultraviolet lamps are installed in the arc portion of the circular channel cross section, and two or more ultraviolet lamps are installed in the central portion. When one or an odd number of ultraviolet lamps are installed, the center of the middle ultraviolet lamp is installed in accordance with the flow path center plane. Furthermore, if the UV intensity of the entire device exceeds the target value, depending on the number of lamp protection tubes and the number of UV lamps accommodated in the lamp protection tubes, symmetrically arranged UV lamps are appropriately thinned out to obtain the overall UV Arrange so as to satisfy the irradiation dose.

  On the other hand, in the ultraviolet irradiation device, it is required to constantly monitor and manage the ultraviolet irradiation amount. However, if one or a plurality of ultraviolet lamps are accommodated in each lamp protective tube distributed on the virtual cylinder, there is a problem that the total ultraviolet intensity irradiated from all the ultraviolet lamps cannot be measured with high accuracy. . That is, normally, an ultraviolet intensity meter that constantly monitors the ultraviolet intensity is housed in an intensity meter protective tube made of quartz glass or the like and installed on the central axis of a virtual cylinder. Conventionally, UV lamps with the same emission length are arranged side by side, so if the light receiving part of the UV intensity meter is placed in the center of the central axis of the virtual cylinder where the UV lamp is placed, the total UV light of all UV lamps Strength can be measured accurately. However, if one or a plurality of ultraviolet lamps are accommodated while being shifted in the axial direction, the distance between the light receiving portion of the ultraviolet intensity meter and each of the ultraviolet lamps varies. If the distance between each ultraviolet lamp and the ultraviolet intensity meter is different, there is a difference in the amount of attenuation of the ultraviolet ray due to the target fluid. Therefore, a device for accurately measuring the total ultraviolet intensity of each ultraviolet lamp is required.

  In addition, the light-receiving part of the ultraviolet intensity meter is generally formed by filling a tube material such as quartz glass with a conversion material that converts ultraviolet light into visible light, and the converted visible light is extracted to the outside with an optical fiber, and a photoelectric conversion element. The UV intensity is measured by converting it into an electrical signal. Since the conversion material of such a light-receiving part deteriorates in conversion performance in accordance with the time of exposure to ultraviolet rays, an ultraviolet intensity meter for constant monitoring needs to calibrate the measurement value in accordance with deterioration over time. Therefore, in the past, the UV light intensity meter's light-receiving unit was periodically extracted, and instead a non-degraded or light-degraded light-receiving unit was inserted to measure the total UV intensity, and the measured value was used as calibration data. As a result, the measurement value of the UV intensity meter for continuous monitoring is calibrated.

  However, since it takes a lot of work to acquire calibration data, it is desired to automatically acquire calibration data and calibrate the measurement value of the monitoring ultraviolet intensity meter. In addition, as described above, when one or a plurality of ultraviolet lamps are housed in the respective lamp protection tubes while being shifted in the axial direction, accurate calibration is possible depending on the positions of the light receiving portions of the UV intensity meter for monitoring and calibration. There is a problem that data cannot be acquired.

A first problem to be solved by the present invention is a cross-flow type ultraviolet irradiation apparatus in which one or a plurality of ultraviolet lamps are housed in each lamp protection tube arranged on a virtual cylinder while being shifted in the axial direction. Therefore, it is possible to accurately measure and monitor the ultraviolet intensity of the ultraviolet lamp.
In addition to the first problem, the second problem to be solved by the present invention is to enable easy and accurate acquisition of calibration data of the monitoring ultraviolet intensity meter.
Furthermore, a third problem to be solved by the present invention is to make it possible to individually monitor the ultraviolet intensities of a plurality of ultraviolet lamps in addition to the first and second problems.

In order to solve the first problem described above, a first aspect of the present invention includes a cylindrical container and a container disposed in the circumferential direction of a virtual cylinder having a container axis of the container as a central axis. A plurality of transparent lamp protection tubes, an ultraviolet lamp housed in each of the lamp protection tubes, a transparent strength meter protection tube provided in the container coaxially with the container axis, and the strength meter protection tube A UV intensity meter for monitoring having a light receiving portion inserted into the tube, and an inlet and an outlet that are provided at opposing positions on the cylindrical wall perpendicular to the container axis and to which a flow conduit of the target fluid is connected. In the ultraviolet irradiation device, the lamp protection tube contains one or a plurality of the ultraviolet lamps, and a light emitting portion of the ultraviolet lamp accommodated in each of the lamp protection tubes passes through the center of the distribution pipe. Channel center plane perpendicular to the axis of the protective tube The monitoring ultraviolet intensity meter is inserted with the light receiving portion positioned at a central position where the intensity meter protective tube intersects the flow path center plane. A cylindrical light shielding tube is provided surrounding the light receiving portion, and a plurality of light guide holes are formed in the cylindrical wall for guiding the ultraviolet rays to the light receiving portion by dispersing the light shielding tube in an axial direction and a circumferential direction. Each light guide hole is provided at a position for guiding the ultraviolet light emitted from the light receiving length set with reference to the light emission length center of each ultraviolet lamp to the light receiving unit according to the position of each ultraviolet lamp. It is characterized by that.

  In other words, when the total ultraviolet output of the entire ultraviolet irradiation device is the same, or when the total amount of ultraviolet irradiation is the same, a plurality of low-output ultraviolet lamps having a short light emission length are accommodated in one lamp protection tube. By doing so, a large number of ultraviolet lamps can be arranged. Thereby, the risk when the ultraviolet lamp is burned out can be reduced. In particular, according to the present invention, the light-emitting portion of one or a plurality of ultraviolet lamps housed in each lamp protection tube is passed through the center of the flow conduit, and the lamp protection tube is based on the flow path center plane perpendicular to the axis of the lamp protection tube. One feature is that the housing is displaced in the axial direction. With such a lamp arrangement, the target fluid that is orthogonal to the lamp axis of the ultraviolet lamp is irradiated with ultraviolet rays from the plurality of ultraviolet lamps arranged in a cylindrical shape, so that the degree of freedom in lamp arrangement increases. Therefore, the target total ultraviolet irradiation intensity can be obtained by appropriately changing the number of the ultraviolet lamps accommodated in the cylindrical lamp protection tube, so that the ultraviolet irradiation performance can be improved. For example, the number of ultraviolet lamps of the lamp protection tube disposed on the string of the arc portion of the circular flow path cross section is one or two, and the ultraviolet light accommodated in another lamp protective tube disposed at the center of the circular flow path cross section. The number of lamps can be increased as appropriate to satisfy the overall UV irradiation amount. Further, when the ultraviolet lamps are installed with their positions shifted in the protective tube axis direction, they are preferably arranged symmetrically with respect to the flow path center plane.

  Further, according to the lamp arrangement of the present invention, the number of lamp protection tubes and the number of ultraviolet lamps accommodated in the lamp protection tubes are changed, the position is shifted with respect to the flow path center plane, or the ultraviolet lamps are thinned out. The target ultraviolet ray irradiation amount can be adjusted by arranging so as to satisfy the ultraviolet ray irradiation amount as a whole. In addition, although this invention can be comprised using a low pressure mercury lamp, it can show | play the still more excellent effect by comprising using a medium pressure mercury lamp with a large output.

  In the first aspect of the present invention, the light-receiving portion of the monitoring ultraviolet intensity meter is positioned at the center position where the intensity-meter protective tube intersects the flow path center plane, and the cylindrical light-shielding tube surrounding the light-receiving portion The light-shielding tube is provided with a plurality of light guide holes, which are dispersed in the axial direction and the circumferential direction to guide the ultraviolet rays to the light receiving portion, in the cylindrical wall, and each light guide hole has a light emission length center of each ultraviolet lamp. The present invention is characterized in that the ultraviolet light emitted from the light receiving length set as a reference is provided at a position for guiding the ultraviolet light to the light receiving unit according to the position of each ultraviolet lamp.

  In other words, an ultraviolet lamp can be regarded as having a plurality of point light sources arranged over the light emission length. Therefore, by measuring the intensity of ultraviolet rays emitted from the set light receiving length, the ultraviolet intensity of each ultraviolet lamp is measured. Can be measured. Therefore, according to the present invention, since the light guide hole is formed at the position and the diameter corresponding to the light receiving length set for each ultraviolet lamp, the ultraviolet lamp is arranged at an arbitrary position of the lamp protection tube. In addition, even if a plurality of lamps are arranged on the same lamp protection tube, the light receiving unit can receive ultraviolet rays emitted from all ultraviolet lamps. Thereby, according to this invention, the total ultraviolet intensity of all the ultraviolet lamps can be monitored accurately.

  In order to solve the second problem of the present invention, the second aspect of the present invention is the end on the opposite side in which the monitoring ultraviolet intensity meter is inserted into the intensity meter protective tube in the first aspect. The calibration ultraviolet intensity meter is inserted from the section, the light receiving portion of the calibration ultraviolet intensity meter is fixed at a position away from the light receiving portion of the monitoring ultraviolet intensity meter, and surrounds the light receiving portion of the calibration ultraviolet intensity meter A cylindrical first light shielding cylinder is provided, and a cylindrical second light shielding cylinder surrounding the first light shielding cylinder is provided so as to be movable in the axial direction, and the first light shielding cylinder is dispersed in the axial direction and the circumferential direction. A plurality of light guide holes for guiding ultraviolet light to the light receiving portion are formed in the cylindrical wall, and each light guide hole receives the ultraviolet light emitted from the light receiving length set on the basis of the light emission length center of each ultraviolet lamp. Depending on the position of each ultraviolet lamp, it is set to the position and diameter leading to the light receiving part, The second light-shielding tube, characterized by comprising movably provided between the second position that exposes all the first position to cover all of the light guide holes of the first light-shielding tube.

  Due to such a configuration, according to the second aspect of the present invention, even if the calibration ultraviolet intensity meter is always inserted into the intensity meter protective tube of the monitoring ultraviolet intensity meter, the second is normally used. By exposing the light shielding tube to the first position and covering all the light guide holes of the first light shielding tube, the exposure time of the light receiving part of the calibration ultraviolet intensity meter can be minimized. Further, when measuring calibration data, the total UV intensity of all the UV lamps can be measured by moving the second light shielding tube to the second position and exposing all the light guide holes of the first light shielding tube. The calibration data for calibrating the total ultraviolet intensity of the monitoring ultraviolet intensity meter can be easily obtained.

  In the second aspect of the present invention, the second light shielding tube only needs to have a length that completely covers the light receiving portion of the calibration ultraviolet intensity meter, so that the second light shielding tube is positioned at the first position and the second position. The positioning accuracy of the moving mechanism that moves to the position is not required. Therefore, the first light-shielding tube is surrounded and provided in the strength meter protection tube, the drive member connected to the second light-shielding tube is pulled out, and the drive member is moved manually or by a linear motion mechanism using a motor or the like. Can be configured. In addition, if the second light-shielding tube is mounted on the outer periphery of the strength meter protection tube so as to surround the first light-shielding tube, the second light-shielding tube is moved by a moving drive mechanism of a lamp protection tube cleaning mechanism described later. Since it is not necessary to provide a special moving mechanism, the apparatus configuration can be simplified.

  In order to solve the third problem of the present invention, the third aspect of the present invention is the end of the first aspect in which the monitoring ultraviolet intensity meter is inserted into the intensity meter protective tube. A calibration ultraviolet intensity meter is inserted, and the light receiving portion of the calibration ultraviolet intensity meter is fixed at a position away from the light receiving portion of the monitoring ultraviolet intensity meter, and surrounds the light receiving portion of the calibration ultraviolet intensity meter. The fixed first light shielding tube and the second light shielding tube rotatable around the tube axis are provided in a double manner, and each ultraviolet ray having a different lamp axis direction and a circumferential position on the tube wall of the first light shielding tube. A plurality of light guide holes for guiding ultraviolet rays to the light receiving portion are formed corresponding to the respective lamps, and a plurality of lamp selection holes are provided corresponding to the ultraviolet lamps at different positions in the lamp axis direction on the cylindrical wall of the second light shielding cylinder. The light guide is changed by changing the rotation angle of the second light shielding cylinder. And ultraviolet light emitted from one ultraviolet lamp corresponding to the position where the lamp selection hole overlaps is formed so as to be able to be introduced into the light receiving part, and the light receiving part among the first light shielding cylinder and the second light shielding cylinder The light guide hole or the lamp selection hole drilled in the light shielding tube provided on the side is a light receiving length set based on the light emission length center of one or a plurality of the ultraviolet lamps housed in the lamp protection tube, respectively. It is provided in the position which guide | induces the ultraviolet-ray irradiated from the said light-receiving part.

  According to the 3rd aspect of this invention, in addition to the 1st aspect and the 2nd aspect, the effect that the ultraviolet intensity of a several ultraviolet lamp can be monitored separately is acquired. That is, when the rotation angle of the second light-shielding tube is sequentially changed, the position where the light guide hole and the lamp selection hole overlap is changed, and the intensity of the ultraviolet rays emitted from one ultraviolet lamp corresponding to the position is individually measured. be able to. As a result, in the constant monitoring by the monitoring ultraviolet intensity meter, when the total ultraviolet intensity suddenly decreases or when a problem such as a relatively large degree of decrease occurs, the calibration ultraviolet intensity meter Individual UV intensity can be measured to diagnose UV lamp breakage and rapid performance degradation.

  According to the third aspect of the present invention, when the calibration data is acquired, the total ultraviolet intensity data obtained by accumulating or totaling the individual ultraviolet intensities measured in the same manner is acquired as the calibration data. Can do. Then, by comparing the total ultraviolet intensity measured by the monitoring ultraviolet intensity meter with the calibration data, the measurement data of the total ultraviolet intensity obtained by calibrating the aging deterioration of the light receiving part of the monitoring ultraviolet intensity meter can be obtained.

In order to solve the third problem of the present invention, in a fourth aspect of the present invention, in the first aspect, a first light shielding tube is fixedly provided on the strength meter protective tube, and the first light shielding is provided. The monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter are inserted from both ends of the cylinder. The monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter each have a light receiving portion, and the intensity meter protective tube is connected to the flowmeter. A lamp shaft is provided on a cylinder wall corresponding to the center position of the first light shielding cylinder, and is provided between the center position intersecting the road center plane and a position retracted from the center position along the insertion direction. A plurality of light guide holes for guiding ultraviolet rays to the light receiving portion are formed corresponding to the ultraviolet lamps having different directions and different circumferential positions, and the monitoring ultraviolet intensity meter is provided to be movable in the axial direction. , The light receiving part of the monitoring ultraviolet intensity meter A surrounding second light-shielding tube is fixed to the light-receiving unit, and a plurality of guides for guiding ultraviolet rays to the light-receiving unit corresponding to the ultraviolet lamps at different positions in the lamp axis direction on the tube wall of the second light-shielding tube. A third light-shielding tube that is provided with a light hole and surrounds the light-receiving portion of the calibration ultraviolet intensity meter is fixed to the light-receiving portion, and the light-receiving portion of the calibration ultraviolet intensity meter rotates around an axis. A plurality of lamp selection holes for guiding ultraviolet rays corresponding to the ultraviolet lamps at different positions in the axial direction of the lamp are provided in the cylindrical wall of the third light shielding cylinder so as to be movable in the axial direction. A first drive mechanism for moving the light receiving part of the ultraviolet intensity meter for an axis in the axial direction, a second drive mechanism for rotating the light receiving part of the ultraviolet ray intensity meter for calibration around the axis, and a third drive mechanism for moving in the axial direction The monitoring ultraviolet is used for monitoring. The light receiving unit of the intensity meter is positioned at the center position to measure the total ultraviolet intensity irradiated from all the ultraviolet lamps, and when the calibration data is acquired, the light receiving unit of the monitoring ultraviolet intensity meter is moved backward. The light receiving portion of the calibration ultraviolet intensity meter is positioned at the center position, and the light receiving portion is rotated so that the lamp selection hole of the third light shielding tube overlaps the light guiding hole of the first light shielding tube. The ultraviolet light emitted from one ultraviolet lamp corresponding to the position to be moved can be introduced into the light receiving portion, and the light guide hole of the second light shielding tube and the lamp selection hole of the third light shielding tube are Each of the plurality of ultraviolet lamps respectively accommodated in the lamp protection tube is provided at a position for guiding ultraviolet rays emitted from a light receiving length set with reference to a light emission length center of the one or more ultraviolet lamps to the light receiving unit. To do.

  That is, the fourth aspect of the present invention is characterized in that, unlike the third aspect, the monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter have the same measurement position. Thereby, since the comparison of the measured value measured with both ultraviolet intensity meters can be performed accurately, the effect that calibration accuracy improves is acquired.

  The fifth aspect of the present invention can be considered as a modification of the second aspect or the fourth aspect. That is, a calibration ultraviolet intensity meter is inserted from the opposite end where the monitoring ultraviolet intensity meter is inserted into the intensity meter protective tube, and a light receiving portion of the calibration ultraviolet intensity meter is connected to the monitoring ultraviolet intensity meter. A cylindrical first light-shielding tube that is fixed at a position away from the light-receiving unit and surrounds the light-receiving unit of the calibration ultraviolet intensity meter is provided, and the cylindrical second light-shielding tube that surrounds the first light-shielding tube is an axis. UV light emitted from a light receiving length set on the basis of the light emission length center of each ultraviolet lamp is distributed in the axial direction and circumferential direction on the cylindrical wall of the first light shielding cylinder. A plurality of light guide holes leading to the light guide portion, and each light guide hole is set to a diameter for guiding the ultraviolet light emitted from the light receiving length to the light receiving portion according to the position of each lamp protection tube, 2 The light-shielding cylinder is shifted in the axial direction and the circumferential direction of the cylinder wall, and the first light-shielding cylinder It is formed by drilling a plurality of lamps selected hole to a position corresponding to the position of Kishirubekoana, and characterized by comprising movable in the axial direction. According to this, when the axial position of the second light shielding tube is shifted, the combination in which the light guide hole of the first light shielding tube and the lamp selection hole of the second light shielding tube overlap each corresponds to one ultraviolet lamp. Therefore, the ultraviolet intensity of each ultraviolet lamp can be monitored or measured by the calibration ultraviolet intensity meter.

According to the first aspect of the present invention, in the cross-flow type ultraviolet irradiation device in which one or a plurality of ultraviolet lamps are housed in the respective lamp protection tubes arranged on the virtual cylinder while being shifted in the axial direction, There is an effect that the ultraviolet intensity of the ultraviolet lamp can be accurately measured and monitored.
Moreover, according to the 2nd aspect of this invention, in addition to the effect of a 1st aspect, there exists an effect that the calibration data of the ultraviolet intensity meter for monitoring can be acquired easily accurately.
Furthermore, according to the third to fifth aspects of the present invention, in addition to the effects of the first and second aspects, there is an effect that the ultraviolet intensity of the plurality of ultraviolet lamps can be individually monitored.

It is front sectional drawing which showed typically the ultraviolet irradiation device of Embodiment 1 of this invention. It is the figure seen from the arrow II-II of embodiment of FIG. It is a schematic diagram explaining arrangement | positioning of the ultraviolet lamp of embodiment of FIG. It is a detailed block diagram around the light-receiving part of the ultraviolet-ray intensity meter for monitoring and the ultraviolet-ray intensity meter for calibration of embodiment of FIG. It is a detailed block diagram of the wiper which is the characteristic of the washing | cleaning mechanism of embodiment of FIG. It is a detailed block diagram around the light-receiving part of the ultraviolet-ray intensity meter for monitoring and the ultraviolet-ray intensity meter for calibration of Embodiment 2 of the ultraviolet irradiation device of the present invention. It is a detailed block diagram around the light-receiving part of the ultraviolet-ray intensity meter for monitoring and the ultraviolet-ray intensity meter for calibration of Embodiment 3 of the ultraviolet irradiation device of the present invention. It is a detailed block diagram around the light-receiving part of the ultraviolet-ray intensity meter for monitoring and the ultraviolet-ray intensity meter for calibration of Embodiment 4 of the ultraviolet irradiation device of the present invention. It is the figure which showed typically the ultraviolet lamp arrangement | positioning which concerns on Embodiment 6 of the ultraviolet irradiation device of this invention, (a) is the front view seen from the inflow direction of object fluid like FIG. 1, (b) is a cross section FIG. It is the figure which showed typically the ultraviolet lamp arrangement | positioning which concerns on Embodiment 7 of the ultraviolet irradiation device of this invention, (a) is the front view seen from the inflow direction of object fluid like FIG. 1, (b) is a cross section FIG.

Hereinafter, the ultraviolet irradiation device of the present invention will be described based on embodiments.
(Embodiment 1)
The configuration of one embodiment of the present invention will be described with reference to FIGS. In the ultraviolet irradiation device of the present embodiment, a cylindrical container 1 and an inflow pipe 2 and an outflow pipe 3 are connected to a position facing the cylinder wall so as to be orthogonal to the cylinder axis of the cylinder wall of the container 1. Thereby, the target fluid is circulated in the container 1 in a direction orthogonal to the cylinder axis of the container 1. The inflow pipe 2 and the outflow pipe 3 are provided with an inflow port 6 and an outflow port 7 for the target fluid having flanges 4 and 5, respectively. The flanges 4 and 5 are formed so as to be able to connect a flow conduit (not shown) for flowing the target fluid into or out of the container 1.

  A plurality of transparent lamp protection tubes 13 arranged so as to extend in parallel with the container axis are accommodated in the container 1, and a straight ultraviolet lamp 14 is inserted into each lamp protection tube 13. . Both ends of the lamp protection tube 13 are inserted into and supported by through holes 15 formed in a pair of end plates 11 provided in the vicinity of both ends of the tube 10 of the container 1. Further, in the drawing of the container 1, cover plates (not shown) are attached to the flanges 12 at both the left and right ends. The cover plate is formed with a through-hole into which each lamp protection tube 13 can be inserted, and each lamp protection tube 13 inserted into the through-hole is sealed watertight by a sealing mechanism such as a gland packing. Further, each ultraviolet lamp 14 is supported on the inner surface of the lamp protection tube 13 via, for example, a ceramic ridge 17 attached to a cap portion 16 formed at both ends.

  Each ultraviolet lamp 14 is supplied with electric input from a ballast and a dimmer provided at the end or outside of the lamp protection tube 13 via a heat-resistant PTFE-coated cable (not shown). It has become. Although the ultraviolet lamp 14 of this embodiment showed the example which supplies an electrical input to the nozzle | cap | die part 16 of both ends, this invention is not restricted to this, The electric power is supplied from the nozzle | cap | die part 16 of one side of the ultraviolet lamp 14. It can also be applied to UV lamps that supply input.

  In the present embodiment, a plurality of n (n = 9 in the illustrated example) lamp protection tubes 13 are arranged so as to extend parallel to the container axis. As shown in FIG. 3, the plurality of lamp protection tubes 13 are arranged at equal intervals along the circumferential direction of the virtual cylinder 18 whose axis is the container axis. In each lamp protection tube 13, one ultraviolet lamp 14 having the same nominal output (for example, an electric input 120 W / cm, a medium pressure mercury lamp having a light emission length of 25 cm) is accommodated one by one in this embodiment.

  In the present embodiment, the plurality of ultraviolet lamps 14 are divided into A group 14- (A) and B group 14- (B), and an arbitrary position in the circumferential direction (for example, the “0 °” position in FIG. 3) is used as a reference. The center position of the emission length of the ultraviolet lamp 14 is alternately arranged clockwise and counterclockwise, and the axial position is divided into the A position and the B position. Here, for the sake of explanation, as shown in FIG. 3, the nine ultraviolet lamps 14 are rotated clockwise from the reference position (0 °) as shown in FIG. 3, and the ultraviolet lamps 14-1 (A), 14-2 (B), 14 −3 (A),..., 14-9 (B) are attached with identification codes. In the present embodiment, the ultraviolet lamps 14-1, 14-3, 14-5, 14-6, and 14-8 are divided into ultraviolet lamps 14- (A) at the A position, and the ultraviolet lamps 14-2 and 14-4. , 14-7 and 14-9 are distributed to the ultraviolet lamp 14- (B) at the B position.

  As shown in FIG. 1, the ultraviolet lamps 14- (A) and 14- (B) pass through the centers of the inlet 6 and the outlet 7 and are perpendicular to the lamp axis (container axis) (hereinafter referred to as flow paths). The center of the light emission length is symmetrically shifted with respect to 19). In FIG. 1, only ultraviolet lamps 14-1 (A) and 14-9 (B) arranged on the inflow port 6 side of the virtual cylinder 18 shown in FIG. 3 are shown to avoid complication. As can be seen from FIGS. 1 and 3, the ultraviolet lamps 14-(A) and 14-(B) are arranged in a zigzag manner along the circumferential direction of the virtual cylinder 18 with the positions shifted in the lamp axis direction. Yes. The light emission length of the ultraviolet lamp 14 is an effective length irradiated with ultraviolet light, and the center of the light emission length can be generally regarded as the center of the ultraviolet lamp 14.

  Further, according to the present embodiment, the group A ultraviolet lamps 14-(A) and the group B ultraviolet lamps 14-(B) are shifted in the protective tube axis direction with respect to the flow path center plane 19, and the emission length is increased. Are arranged symmetrically with respect to the flow path center plane 19, so that the overlap of the ultraviolet lamps in the flow direction of the target fluid can be reduced. In addition, since the ultraviolet lamp 14 can be widely dispersed in the lamp axis direction, the density of ultraviolet rays received by the target fluid flowing through the ultraviolet irradiation region can be equalized to improve the irradiation performance.

  The basic operation of the ultraviolet irradiation apparatus of the first embodiment configured as described above will be described. The target fluid flows into the container 1 from the inlet 6 shown in FIG. 2 in the direction of the arrow 8, flows through the ultraviolet irradiation region where the plurality of lamp protection tubes 13 are arranged, and is discharged from the outlet 7. . The target fluid is processed by being irradiated with ultraviolet rays emitted from the ultraviolet lamp 14 accommodated in the lamp protection tube 13 when flowing through the ultraviolet irradiation region. For example, when the target fluid is water, beverages, foods, etc., microorganisms such as bacteria contained in those fluids are killed or inactivated. In addition, when the target fluid is wastewater such as sewage, decolorization of the fluid, killing or inactivation of microorganisms, decomposition or synthesis of chemical substances such as organic substances, or promotion of oxidation of substances contained in the target fluid, TOC Perform disassembly. Further, semiconductor cleaning water can be produced by circulating pure water or the like.

  Next, the cleaning mechanism of this embodiment will be described. The cleaning mechanism 21 is a device that removes dirt attached to the outer surfaces of the lamp protection tube 13 of the ultraviolet lamp 14 and the strength meter protection tube 31 described later, and is provided as necessary. The cleaning mechanism 21 includes three traveling rails 22 provided between the pair of end plates 11, three sets of traveling carriages 23 provided so as to be able to travel on each traveling rail 22, and three sets of traveling. The ring-shaped wiper holding member 24 supported by the carriage 23 is included. The ring inner diameter of the wiper holding member 24 is formed larger than the outer diameter of the plurality of lamp protection tubes 13 arranged in a cylindrical shape. A wiper 25 is provided so as to project from the inner diameter side of the ring of the wiper holding member 24 so as to surround the outer peripheral surfaces of the lamp protection tube 13 and the strength meter protection tube 31.

  Further, the cleaning mechanism 21 includes a feed screw rod 27 that is rotatably supported by a bearing 26 across a pair of end plates 11, and a cylindrical nut 28 having an inner screw screwed to the feed screw rod 27. It is comprised including. The nut 28 is supported by the ring-shaped wiper holding member 24 via the nut holding member 29. One end 27a of the feed screw rod 27 is drawn out through a cover plate (not shown) attached to the end plate 11 and the flange 12, and is formed to be rotatable by a drive motor (not shown). The cover plate is provided with a member that hermetically seals one end 27 a of the feed screw rod 27.

  Here, the configuration of the wiper 25 which is a feature of the cleaning mechanism 21 of the present embodiment will be described with reference to FIG. As shown in FIG. 5C, the wiper 25 includes a ring-shaped brush portion 25a that is loosely fitted to the outer periphery of the lamp protection tube 13 and the strength meter protection tube 31, and an annular groove that loosely holds the outer periphery of the brush portion 25a. A brush cover 25b which is a brush holding member having As shown in FIG. 5A, the brush portion 25a is formed by holding a metal brush 25d on the inner peripheral surface of a ring-shaped base member 25c. The brush 25d is formed using, for example, a thin stainless steel wire (for example, 0.8 to 1.0 mm in diameter), and the inner diameter of the brush portion 25a is equal to or slightly smaller than the outer diameter of the lamp protection tube 13 or the strength meter protection tube 31. Is formed. Various known methods can be applied to fix the base member 25c and the brush 25d. In addition, the brush 25d is fixed to the linear base member 25c, the base member 25c is wound in a spiral shape with the brush 25d on the inner peripheral surface side, and then cut, and the cut surface 25e is abutted to contact the ring-shaped brush portion 25a. Can be manufactured. On the other hand, as shown in FIG. 5B, the brush cover 25b forms a pair of cover members 25h each having an edge portion 25g in which the outer peripheral edge of the ring flat plate 25f is raised by drawing. Then, as shown in the assembly diagram of FIG. 7C, the ring-shaped brush portion 25a is enclosed in a pair of cover members 25h, and the tip surface of the edge portion 25g is abutted and bonded to form the wiper 25. it can.

  Here, in the present embodiment, the outer diameter of the ring-shaped base member 25c is smaller than the diameter of the inner peripheral surface of the edge portion 25g of the brush cover 25b, and the inner surface of the brush cover 25b and the outer peripheral surface of the brush portion 25a A gap is formed between them so that the brush portion 25a can freely move in the radial direction within the brush cover 25b.

  The operation of the cleaning mechanism 21 of the present embodiment configured as described above will be described. When the cleaning mechanism 21 rotates the feed screw rod 27 forward by a drive motor (not shown), the wiper holding member 24 supported by the nut 28 moves along the traveling rail 22 via the traveling carriage 23 to the retracted position. Move from C to the right in FIG. By this movement, the wiper 25 held by the wiper holding member 24 is slid along the outer surface of the lamp protection tube 13, and the forward end position D is scraped off the dirt adhering to the outer surface of the lamp protection tube 13. To. When the drive motor is rotated in the reverse direction and the feed screw rod 27 is rotated in the reverse direction, the wiper 25 moves in the reverse direction from the forward end position D while scraping off the dirt adhering to the outer surface of the lamp protection tube 13. Returning to the retreat position C, one cleaning operation is completed. If necessary, the cleaning operation can be repeated a plurality of times to remove strongly or abundantly adhered dirt on the outer surface of the lamp protection tube 13. The cleaning mechanism 21 is returned to the retracted position C because the traveling carriage 23, the wiper holding member 24, the wiper 25, the nut 28, and the like are retracted from the ultraviolet irradiation region connecting the inlet 6 and the outlet 7 of the target fluid. This is to prevent the ultraviolet irradiation and the flow of the target fluid from being hindered.

  In particular, according to the cleaning mechanism 21 of the present embodiment, since the brush portion 25a can freely move in the radial direction over the entire circumference in the brush cover 25b, for example, when the lamp protection tube 13 is formed of a quartz glass tube, it is manufactured. Although tolerances are relatively large, manufacturing tolerances can be absorbed. Further, even if the lamp protection tube 13 or the strength meter protection tube 31 is displaced relative to the wiper holding member 24 due to bending or the like, the brush portion 25a can move and absorb the displacement of the relative position, so that the lamp protection tube 13 or Damage to the strength meter protection tube 31 can be prevented. Further, since the brush 25d is formed of a thin metal wire, an intermediate pressure mercury lamp having a high lamp surface temperature can be applied to the ultraviolet lamp 14.

  Next, the configuration of the monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter, which are the features of this embodiment, will be described with reference to FIGS. As shown in the drawing, an intensity meter protection tube 31 is provided across the pair of end plates 11 on the central axis of the virtual cylinder 18 of the lamp protection tube 13 and the ultraviolet lamp 14 disposed on the virtual cylinder 18. The strength meter protection tube 31 is formed using a transparent quartz glass tube or the like, and both ends are drawn out through a cover plate (not shown) attached to the flange 12. 1, a monitoring ultraviolet intensity meter 32 is inserted from the right end in FIG. 1, and a calibration ultraviolet intensity meter 33 is inserted from the left end.

  The monitoring ultraviolet intensity meter 32 is provided so as to surround the outer periphery of the light receiving portion 32a, as shown in FIG. 4, a light receiving portion 32a provided at the distal end in the insertion direction, a support rod 32b that supports the light receiving portion 32a. The light shielding cylinder 32c, a fixing member 32d for fixing the light shielding cylinder 32c to the support rod 32b, and an optical fiber (not shown) coupled to the light receiving portion 32a are provided. The monitoring ultraviolet intensity meter 32 is installed such that the center of the ultraviolet light receiving portion 32 a is located at the center position where the intensity meter protection tube 31 intersects the flow path center plane 19.

  The calibration ultraviolet intensity meter 33 surrounds the outer periphery of the light receiving portion 33a, as shown in FIG. 4, the light receiving portion 33a provided at the tip in the insertion direction, the support rod 33b that supports the light receiving portion 33a. The light shielding cylinder 33c, which is a first light shielding cylinder, a fixing member 33d that fixes the light shielding cylinder 33c to the support rod 33b, and an optical fiber (not shown) coupled to the light receiving portion 33a are provided. The calibration ultraviolet intensity meter 33 is installed such that the center of the ultraviolet light receiving portion 33a is located in the flow path cross section away from the position of the light receiving portion 32a of the monitoring ultraviolet intensity meter 32. Further, a light shielding cylinder 34 which is a cylindrical second light shielding cylinder surrounding the light shielding cylinder 33 c is provided on the outer periphery of the strength meter protection tube 31 so as to be movable in the axial direction.

  The light receiving portion 32a and the light receiving portion 33a are formed to have the same configuration, and are formed by filling tubes 32e and 33e such as quartz glass with a conversion material that converts ultraviolet light into visible light. Then, ultraviolet rays incident from all directions of the outer peripheral surfaces of the tubular bodies 32e and 33e can be received and converted. Visible light converted by the conversion material is drawn out through the hollow support rods 32b and 33b through an optical fiber, converted into an electric signal by a photoelectric conversion element (not shown), and then processed by an arithmetic processing unit. UV intensity is measured and monitored.

  Each of the light shielding cylinder 32c and the light shielding cylinder 33c is formed by sealing an end portion of a light-shielding tube made of, for example, aluminum, and the support rod 32b by a set screw or the like via the fixing member 32d and the fixing member 33d. It is fixed to the tip of 33b. The light shielding tube 32c has a plurality of light guide holes 36 which are dispersed in the axial direction and the circumferential direction to guide the ultraviolet light to the light receiving portion 32a, that is, a plurality of light guide holes 36 are formed in the tube wall according to the number of ultraviolet lamps. ing. In the present embodiment, nine light guide holes 36-1 (A) to 36-9 (B) are arranged in the A group in accordance with the nine ultraviolet lamps 14-1 (A) to 14-9 (B). Are distributed at two locations in the axial direction in correspondence with the B group and distributed in the circumferential direction with reference to the 0 ° position in FIG. That is, each light guide hole 36 transmits ultraviolet light irradiated from the light receiving length Ls set with reference to the light emission length center of the ultraviolet lamp 14- (A) or 14- (B) shown in FIG. It is drilled at the guiding position. In particular, as shown in FIG. 1, the diameter of each light guide hole 36 is set to a size capable of receiving ultraviolet rays emitted from the light receiving length Ls according to the position of each ultraviolet lamp 14.

  In the present embodiment, the group A ultraviolet lamp 14-(A) and the group B ultraviolet lamp 14-(B) are arranged symmetrically with respect to the flow path center plane 19, and the monitoring ultraviolet intensity meter 32. Since the light receiving portion 32a is disposed at the position of the flow path center plane 19, the distance from the light receiving portion 32a to the light receiving length Ls of the ultraviolet lamps 14- (A) and 14- (B) is the same distance. . Therefore, since the attenuation amount of the ultraviolet rays by the target fluid existing in the meantime becomes the same, the total ultraviolet intensity can be accurately measured.

  Similarly, a plurality of light guide holes 37 that guide the ultraviolet rays to the light receiving portion 33a by being dispersed in the axial direction and the circumferential direction are formed in the light shielding tube 33c in the tube wall according to the number of the ultraviolet lamps. In the present embodiment, nine light guide holes 37-1 (A) to 37-9 (B) are arranged in the A group in accordance with the nine ultraviolet lamps 14-1 (A) to 14-9 (B). Are distributed at two locations in the axial direction in correspondence with the B group and distributed in the circumferential direction with reference to the 0 ° position in FIG. Similarly to the light guide hole 36, the light guide hole 37 receives ultraviolet rays emitted from the light receiving length Ls set with the light emission length center of the ultraviolet lamp 14- (A) or 14- (B) as a reference. It is drilled at a position leading to the portion 33a. In the present embodiment, the distance to both ends of the light receiving length Ls of the light receiving section 33a and each of the ultraviolet lamps 14- (A) of the A group, and the light receiving length Ls of each of the light receiving sections 33a and each of the ultraviolet lamps 14- (B) of the B group. The distance to both ends of is not the same. Therefore, the diameter of each light guide hole 37 is irradiated from both ends of the light receiving length Ls so as to correspond to each ultraviolet lamp 14- (A) in the A group and each ultraviolet lamp 14- (B) in the B group. It is set to a size that transmits ultraviolet light and guides it to the light receiving portion 33a. That is, in the present embodiment, the light receiving portion 33a of the calibration ultraviolet intensity meter 33 is fixedly provided at a position away from the flow path center plane 19, so that each light guide hole 37 is different from the light guide hole 36. The axial position and hole diameter will be different. In general, when the distance between the light receiving unit and the light receiving length of the ultraviolet lamp is different, the ultraviolet intensity measured by the ultraviolet transmittance of the target fluid is affected. Therefore, the transmittance spectrum of the target fluid is measured, and the measured value of the ultraviolet intensity can be corrected by calculation in consideration of the distance between the light receiving unit and the light receiving length of the ultraviolet lamp. In the case of performing correction by calculation in this way, since the ultraviolet intensity guided from the ultraviolet lamp to the light receiving unit can be corrected, the diameter of each light guide hole 37 of the present embodiment can be formed to be the same.

  The light shielding tube 34 is not provided with a light guide hole, but is provided to be movable between a first position that covers all the light guide holes 36 of the light shielding tube 32c and a second position that exposes all the light guide holes 36. . In this embodiment, one end of the light shielding cylinder 34 is supported by the wiper holding member 24 of the cleaning mechanism, so that the movement mechanism of the cleaning mechanism 21 can be used to move between the retracted position C and the forward end position D of FIG. Can be configured.

  The measurement operation of the ultraviolet intensity by the monitoring ultraviolet intensity meter 32 configured as described above will be described. Since the monitoring ultraviolet intensity meter 32 is fixedly provided at the position shown in FIG. 1, as shown in FIG. 4B, the light shielding cylinder 32c is drilled in correspondence with the ultraviolet lamp 14 of the A group. The light guide holes 36-1 (A), 36-3 (A), 36-5 (A), 36-6 (A), 36-8 (A), and the ultraviolet lamps 14 of the B group The light receiving length of each ultraviolet lamp 14 passes through the light guide holes 36-2 (B), 36-4 (B), 36-7 (B), and 36-9 (B) drilled in the light shielding cylinder 32c. Ultraviolet rays irradiated from the Ls portion are incident on the light receiving portion 32a. Visible light converted by the light receiving unit 32 a is input to an intensity measuring device configured to include an arithmetic processing device via a glass fiber, and is measured as a total ultraviolet intensity of all the ultraviolet lamps 14. The measured value is appropriately taken into the arithmetic processing unit and recorded in the memory, and the change in the ultraviolet intensity of the entire ultraviolet irradiation apparatus can be monitored.

  In managing the change in ultraviolet intensity, the degree of decrease in the measured value of the total ultraviolet intensity is monitored, whether the performance of the ultraviolet lamp 14 has deteriorated as a whole, or whether the turbidity of the target fluid has increased primarily. Diagnose and respond. When some of the ultraviolet lamps 14 are blown out, the electrical input of each ultraviolet lamp 14 can be monitored and diagnosed, and need not be measured by the monitoring ultraviolet intensity meter 32. In the present embodiment, since the total ultraviolet intensity of all the ultraviolet lamps 14 is measured, it cannot be determined when the total ultraviolet intensity is reduced due to the performance deterioration of some of the ultraviolet lamps 14. In this case, as described in Embodiments 3 and 4 to be described later, the ultraviolet lamp 14 to be replaced can be specified by individually measuring the ultraviolet intensity of the ultraviolet lamp 14.

  Next, an operation of measuring the ultraviolet intensity with the calibration ultraviolet intensity meter 33 and acquiring the calibration data of the monitoring ultraviolet intensity meter 32 will be described. As shown in FIG. 1, the calibration ultraviolet intensity meter 33 is fixed by positioning the light receiving portion 33 a at a position away from the position of the light receiving portion 32 a of the monitoring ultraviolet intensity meter 32. In addition, the light receiving unit 33a of the calibration ultraviolet intensity meter 33 converts the ultraviolet light into visible light using the same conversion material as the light receiving unit 32a of the monitoring ultraviolet intensity meter 32, and thus is exposed to the ultraviolet light for a long time. And conversion characteristics will deteriorate. Therefore, in a normal state, the light guide tube 34 in which no light guide hole is formed is held at a position covering all the light guide holes 37 formed in the light shield tube 33c. Since the light shielding cylinder 34 is supported by the wiper holding member 24 of the cleaning mechanism 21, the light shielding cylinder 34 is held at a position corresponding to the retracted position C of the cleaning mechanism 21 during normal times when calibration data is not acquired.

  When acquiring the calibration data, the cleaning mechanism 21 is moved to the forward end position D. As a result, the light shielding tube 34 moves from a position covering the light receiving portion 33a of the calibration ultraviolet intensity meter 33 to a position corresponding to the forward end position D, and all the light guide holes 37 formed in the light shielding tube 33c are exposed. . Accordingly, as with the monitoring ultraviolet intensity meter 32, as shown in FIG. 4A, the light guide hole 37- formed in the light shielding tube 33c corresponding to the ultraviolet lamp 14- (A) of the A group. 1 (A), 37-3 (A), 37-5 (A), 37-6 (A), 37-8 (A), and the light blocking cylinder corresponding to the ultraviolet lamp 14- (B) of the B group The light receiving length Ls of each ultraviolet lamp 14 passes through the light guide holes 37-2 (B), 37-4 (B), 37-7 (B), and 37-9 (B) bored in 33c. Ultraviolet rays irradiated from the portion are incident on the light receiving portion 33a. Visible light converted by the light receiving unit 33a is input to an intensity measuring device and an arithmetic processing unit (not shown) via a glass fiber, and a measurement value of the total ultraviolet intensity of all the ultraviolet lamps 14 is obtained and stored as calibration data. Record in etc.

  Here, since the calibration data corresponds to the total ultraviolet intensity measured by the monitoring ultraviolet intensity meter 32, the calibration data is compared with the measured value of the monitoring ultraviolet intensity meter 32 measured at the same time or before and after the calibration data is acquired. Then, a calibration coefficient or a calibration function for matching the measured value of the monitoring ultraviolet intensity meter 32 with the calibration data can be obtained, and the measured value of the monitoring ultraviolet intensity meter 32 can be calibrated. All of these measurement operations can be performed automatically. Further, according to the present embodiment, the light receiving unit 33a is normally shielded by the light blocking cylinder 34 and the ultraviolet light is introduced into the light receiving unit 33a only at the time of measurement. Even if it is always mounted in 1, the deterioration of the conversion material of the light receiving portion 33a is small. When the calibration data is acquired in the same manner as before, the calibration ultraviolet intensity meter 33 of this embodiment and the related parts such as the light shielding cylinder 33 and the light shielding cylinder 34 can be omitted.

  Note that the position of the light receiving portion 33a of the calibration ultraviolet intensity meter 33 of the present embodiment is not equidistant from the group A ultraviolet lamp 14- (A) and the group B ultraviolet lamp 14- (B). . Accordingly, since the distance to the light receiving length Ls of the ultraviolet lamps 14- (A) and 14- (B) is different as viewed from the light receiving unit 33a, the attenuation amount of ultraviolet rays due to the target fluid existing between them is different, so that the total ultraviolet intensity is increased. Cannot always be measured accurately. However, during the initial operation of the ultraviolet irradiation device, the total ultraviolet intensity of the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 are respectively measured under the same conditions, and the ratio is included in the calibration data as a correction ratio and recorded. If so, it can be calibrated with high accuracy.

(Embodiment 2)
Embodiment 2 of the ultraviolet irradiation device of the present invention will be described. This embodiment is different from the first embodiment in the configuration of a calibration ultraviolet intensity meter. Therefore, the configuration of the main part of the calibration ultraviolet intensity meter of the present embodiment will be described with reference to FIG. Since other points are the same as those of the first embodiment, illustration is omitted.

  In the present embodiment, the ultraviolet intensity of the plurality of ultraviolet lamps 14 can be individually measured using the calibration ultraviolet intensity meter 33 in the ultraviolet irradiation apparatus shown in FIG. That is, as shown in FIG. 6, the calibration ultraviolet intensity meter 33 uses a light shielding cylinder 43 instead of the light shielding cylinder 33c, which is the first light shielding cylinder of the first embodiment, and is coaxially arranged on the outer periphery of the light shielding cylinder 43. A light shielding cylinder 44 which is a light shielding cylinder is fixedly provided, and is configured to include double light shielding cylinders 43 and 44. Further, the support rod 33b is rotatably provided by a rotation mechanism (not shown), whereby the light shielding cylinder 43 is rotationally driven with respect to the light shielding cylinder 44. Since other parts have the same configuration as that of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The light shielding tube 43 is provided with one lamp selection hole 43a at an axial position corresponding to the A group ultraviolet lamp 14- (A), and an axial direction corresponding to the B group ultraviolet lamp 14- (B). One lamp selection hole 43b is formed at the position. These lamp selection holes 43 a and 43 b are provided with a 180 ° phase shift in the circumferential direction of the light shielding cylinder 43. That is, each lamp selection hole 43a, 43b is an axial position that guides the ultraviolet rays irradiated from the light receiving length Ls of the A group ultraviolet lamp 14- (A) or the B group ultraviolet lamp 14- (B) to the light receiving portion 33a. The diameters of these holes are set to a size capable of receiving the ultraviolet rays irradiated from the light receiving length Ls.

  On the other hand, the light shielding tube 44 has nine light guide holes 44-1 (A) to 44-9 (B) corresponding to the nine ultraviolet lamps 14-1 (A) to 14-9 (B). These are distributed at two locations in the axial direction corresponding to the A group and the B group, and are distributed in the circumferential direction with reference to the 0 ° position in FIG. That is, the light guide holes 44-1 (A) to 44-9 (B) respectively block the ultraviolet rays from the light receiving lengths Ls of the corresponding ultraviolet lamps 14-1 (A) to 14-9 (B). The light guide 33a is led through the 43 lamp selection holes 43a or 43b. In addition, these light guide holes 44-1 (A) to 44-9 (B) selected the ultraviolet lamps 14-1 (A) to 14-9 (B) to be measured by rotating the light shielding tube 43. In the position, ultraviolet rays may be guided to the lamp selection hole 43a or 43b. Therefore, the accuracy of the hole diameters of the light guide holes 44-1 (A) to 44-9 (B) is not required, so that a larger hole diameter can be obtained.

  According to the present embodiment configured as described above, the total ultraviolet intensity of all the ultraviolet lamps 14 can be constantly measured using the monitoring ultraviolet intensity meter 32 as in the first embodiment. Further, when the calibration ultraviolet intensity meter 33 is used, the ultraviolet intensity of each of the ultraviolet lamps 14-1 (A) to 14-9 (B) is individually measured as described below, and based on the measured value. Calibration data can be acquired. First, the support rod 33b is rotated in either direction as shown by the arrow 45 in the figure, and for example, the lamp selection hole 43a of the light shielding tube 43 is aligned with the light guide hole 44-1 (A) of the light shielding tube 44. Thereby, ultraviolet rays are guided from the light receiving length Ls of the ultraviolet lamp 14-1 (A) to the light receiving portion 33a through the lamp selection hole 43a. Further, when the lamp selection hole 43b of the light shielding tube 43 is aligned with the light guide hole 44-4 (B) of the light shielding tube 44, the ultraviolet light from the light reception length Ls of the ultraviolet lamp 14-4 (B) passes through the lamp selection hole 43b. 33a. In this way, while the light shielding cylinder 43 is rotated once in either direction, one ultraviolet lamp 14 is sequentially selected by the lamp selection hole 43a or 43b, and irradiation is performed from the light receiving length Ls of the selected ultraviolet lamp 14. Only the ultraviolet rays to be transmitted are guided to the light receiving unit 33a, and the individual ultraviolet intensity of the ultraviolet lamp 14 can be measured. Further, the total ultraviolet intensity can be obtained by integrating or summing the individual measured values of the ultraviolet intensity, and this is recorded as calibration data.

  According to the present embodiment, the light shielding tube 44 that is the first light shielding tube that surrounds and fixes the light receiving portion 33a of the calibration ultraviolet intensity meter 33, and the light shielding tube that is the second light shielding tube that can rotate around the tube axis. 43, and a plurality of light guide holes 44-1 (A) to 44-9 (B) corresponding to the respective ultraviolet lamps 14 are formed in the cylindrical wall of the light shielding tube 44. Since a plurality of (two) lamp selection holes 43a and 43b corresponding to the ultraviolet lamps 14- (A) and 14- (B) at positions where the lamp axis directions are different are formed in the tube wall, the rotation of the light shielding tube 43 is performed. By changing the angle, the intensity of ultraviolet rays emitted from one ultraviolet lamp 14 corresponding to the position where the lamp selection holes 43a and 43b overlap with the light guide holes 44-1 (A) to 44-9 (B). Can be measured individually. Thereby, in the constant monitoring by the monitoring ultraviolet intensity meter 32, when the total ultraviolet intensity is suddenly decreased or when a problem such as a relatively large degree of decrease occurs, each ultraviolet intensity is corrected by the calibration ultraviolet intensity meter 33. By measuring the individual ultraviolet intensity of the lamp 14, it is possible to diagnose breakage of the ultraviolet lamp 14, rapid performance deterioration, and the like.

(Embodiment 3)
In FIG. 7, the structure of the characteristic part of Embodiment 3 of the ultraviolet irradiation device of this invention is shown. This embodiment is different from the first and second embodiments in the configuration of a monitoring ultraviolet intensity meter and a calibration ultraviolet intensity meter. Therefore, the configuration of the main parts of the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 of this embodiment will be described with reference to FIG. Since other points are the same as those of the first and second embodiments, illustration and description are omitted.

  The monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 of the present embodiment are respectively arranged in the axial direction of the arrows 51 and 52 in the light shielding cylinder 50 accommodated and fixed coaxially in the intensity meter protection tube 31. It is inserted so that it can move forward and backward. Although a drive mechanism for moving the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 forward and backward in the axial direction is not shown, the ends of the support rods 32b and 33b are pulled out of the intensity meter protective tube 31. The gear connected to the motor shaft can be meshed with the rack gear attached to the end thereof. Further, the calibration ultraviolet intensity meter 33 can be rotated by a motor capable of controlling the rotation angle position of a stepping motor or the like with high accuracy via a rotation drive mechanism (not shown) as shown by an arrow 53 in the drawing. Is formed.

  The light receiving portion 32a, the light shielding cylinder 32c, the fixing member 32d, and the like of the monitoring ultraviolet intensity meter 32 are formed in the same manner as in FIG. Further, the light receiving portion 33a, the light shielding tube 33c, the fixing member 33d, etc. of the calibration ultraviolet intensity meter 33 are formed in the same manner as in FIG. 6 of the second embodiment. The light-shielding tube 50 of the present embodiment is an aluminum tube that is fixed in position within the strength meter protection tube 31, and has a light guide hole 44 formed in the same manner as in FIG. In particular, the light shielding tube 50 of the present embodiment includes axial positions of light guide holes 44-1 (A) to 44-8 (A) drilled corresponding to the ultraviolet lamps 14- (A) of the A group, The midpoint of the axial position of the light guide holes 44-2 (B) to 44-9 (B) drilled in correspondence with the group B ultraviolet lamps 14- (B) is the channel center plane of the ultraviolet irradiation device. It is fixed to 19 position.

  Since it is configured as described above, the total ultraviolet intensity of all the ultraviolet lamps 14 of the ultraviolet irradiation apparatus is described as follows using the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 of the present embodiment. The individual ultraviolet intensity of each ultraviolet lamp 14 and the calibration data of the monitoring ultraviolet intensity meter 32 can be measured. First, at normal time, the calibration ultraviolet intensity meter 33 is moved backward to the left in FIG. The retreat amount may be such that the positions of the light receiving part 32a and the light receiving part 33a in FIG. Thereby, the light receiving part 33a is detached from the light guide hole 44 of the light shielding tube 50, and the ultraviolet light guided to the light receiving part 33a is blocked, so that the deterioration of the conversion material of the light receiving part 33a is suppressed. In this state, the monitoring ultraviolet intensity meter 32 is advanced to align the light receiving part 32a with the position of the flow path center plane 19. Thereby, the ultraviolet rays irradiated from the respective ultraviolet lamps 14 are guided to the light receiving part 32a through the light guide hole 44 of the light shielding cylinder 50 and the light guide hole 36 of the light shielding cylinder 32c, and the total ultraviolet intensity of all the ultraviolet lamps 14 is measured. be able to.

  On the other hand, when the calibration data is acquired, the monitoring ultraviolet intensity meter 32 is retracted to the right in FIG. 1 or FIG. 7 and the calibration ultraviolet intensity meter 33 is advanced so that the position of the light receiving portion 33a is the position of the flow path center plane 19. To match. Thereby, the ultraviolet rays irradiated from the respective ultraviolet lamps 14 can be guided from the light guide hole 44 of the light shielding tube 50 to the light receiving portion 33a. However, depending on the position of the lamp selection holes 43a and 43b of the light shielding tube 33c, the ultraviolet rays reaching the light receiving portion 33a are shielded. Next, the light shielding cylinder 33c is rotated via the support rod 33b, and when one of the lamp selection holes 43a and 43b and one of the light guide holes 44 overlap each other, the light is irradiated from the light receiving length Ls of one ultraviolet lamp 14. The ultraviolet rays are guided to the light receiving unit 33a, and the individual ultraviolet intensity of the one ultraviolet lamp 14 can be measured. In this way, the light shielding cylinder 33c is rotated to sequentially select one ultraviolet lamp 14 to be measured, and the ultraviolet intensity of all the ultraviolet lamps 14 is individually measured.

  Here, in the calibration ultraviolet intensity meter 33, the light receiving part 33a is normally shielded by the light shielding tube 50 and the ultraviolet light is introduced into the light receiving part 33a only at the time of measurement. Even if it is always mounted in the container 1, the deterioration of the conversion material of the light receiving portion 33a is small. Therefore, by integrating or summing the ultraviolet intensity of each ultraviolet lamp 14 measured by the calibration ultraviolet intensity meter 33, calibration data of the measured value of the total ultraviolet intensity of the monitoring ultraviolet intensity meter 32 can be acquired.

  That is, in this embodiment, a light shielding tube 50 as a first light shielding tube is fixed to the intensity meter protection tube 31, and a monitoring ultraviolet intensity meter 32 and a calibration ultraviolet intensity meter 33 are provided from both ends of the light shielding tube 50. Are inserted between the positions of the light receiving portions 32a and 32b on the flow path center surface 19 of the intensity meter protection tube 31 and the positions where the light intensity retreats along the insertion direction. It is provided to be movable. Further, the ultraviolet light lamps 14 having different positions in the lamp axial direction and different positions in the circumferential direction are associated with the cylindrical wall of the light shielding cylinder 50 which is the first light shielding cylinder, respectively, and distributed in the axial direction from the flow path center plane 19 to The light guide holes 44- (A) and the light guide holes 44- (B) of the B group are formed by being dispersed in the circumferential direction. Further, a light shielding tube 32c, which is a second light shielding tube surrounding the light receiving portion 32a of the monitoring ultraviolet intensity meter 32, is provided fixed to the light receiving portion 32a, and the light receiving portion 32a is provided in the axial direction via the support rod 32b. It is provided to be movable. A plurality of light guide holes 36 are formed in the cylindrical wall of the light shielding cylinder 32c so as to correspond to the respective ultraviolet lamps 14 at different positions in the lamp axis direction. On the other hand, a light shielding tube 33c, which is a third light shielding tube surrounding the light receiving portion 33a of the calibration ultraviolet intensity meter 33, is fixed to a support rod 33b that supports the light receiving portion 33a. Further, the light receiving portion 33a of the calibration ultraviolet intensity meter 33 is provided so as to be rotatable about the axis and movable in the axial direction, and each ultraviolet lamp 14- (A ), 14- (B), a plurality (two in the illustrated example) of lamp selection holes 43a and 43b are formed. Further, a first drive mechanism (not shown) that moves the light receiving portion 32a of the monitoring ultraviolet intensity meter 32 in the axial direction, and a second drive mechanism that rotates the light receiving portion 33a of the calibration ultraviolet intensity meter 33 around the axis. (Not shown) and a third drive mechanism (not shown) that moves in the axial direction are provided.

At the time of monitoring, the light receiving portion 32a of the monitoring ultraviolet intensity meter 32 is positioned on the flow path center plane 19 and the total ultraviolet intensity irradiated from all the ultraviolet lamps 14 is measured. At the time of acquisition of calibration data, the light receiving portion 33a of the monitoring ultraviolet intensity meter 33 is retracted, the light receiving portion 33a of the calibration ultraviolet intensity meter 33 is positioned on the flow path center plane 19, and the light receiving portion 33a is rotated to rotate the light shielding cylinder. The ultraviolet light emitted from one ultraviolet lamp 14 corresponding to the position where the lamp selection holes 43a and 43b of 33c are overlapped with any one of the light guide holes 44 of the light shielding tube 50 is formed so as to be introduced into the light receiving portion 33a. Has been. In particular, the light guide hole 36 of the light shielding tube 32c and the lamp selection holes 43a and 43b of the light shielding tube 33c are light receptions set based on the light emission length centers of one or more ultraviolet lamps 14 housed in the lamp protection tube 13, respectively. The position and the hole diameter are set so as to guide the ultraviolet rays irradiated from the long to the light receiving portions 32a and 33a.

  In particular, according to the present embodiment, the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 both have the ultraviolet intensity of the ultraviolet lamps 14-(A) and 14-(B) at the flow path center plane 19. It is different from the first and second embodiments in that it is measured. That is, the distance between the light receiving unit 32a and the light receiving lengths of the ultraviolet lamps 14- (A) and 14- (B) and the light receiving length of the light receiving unit 33a and the ultraviolet lamps 14- (A) and 14- (B). Therefore, the ultraviolet intensity of each ultraviolet lamp can be measured under the same conditions regardless of the transmittance of the target fluid. Thereby, according to this embodiment, compared with Embodiment 1, 2, it can measure by relating the total ultraviolet intensity, the individual ultraviolet intensity, and the calibration data with higher accuracy.

(Embodiment 4)
In FIG. 8, the structure of the characteristic part of Embodiment 4 of the ultraviolet irradiation device of this invention is shown. This embodiment is a modification of the third embodiment, and the configuration of the light shielding cylinder of the calibration ultraviolet intensity meter 33 is different. Therefore, the configuration of the main parts of the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 of the present embodiment will be described with reference to FIG. Since other points are the same as those in the first and third embodiments, the illustration is omitted.

  As shown in FIG. 8, this embodiment is different from the third embodiment of FIG. 7 in that first, instead of the plurality of lamp selection holes 43a and 43b of the light shielding tube 33c of the calibration ultraviolet intensity meter 33 of FIG. 4 is that the plurality of light guide holes 37 of the first embodiment of FIG. 4 are employed. Further, in place of the light shielding tube 44 of the calibration ultraviolet intensity meter 33 in FIG. 6, a light shielding tube 60 having a lamp selection hole 61 instead of the light shielding tube 34 in the first embodiment in FIG. It is in wearing. Further, the light shielding cylinder 60 is provided so as to be movable in the axial direction as indicated by an arrow 63 in FIG. 8 and is supported by the wiper holding member 24 of the cleaning mechanism 21. That is, as shown in FIG. 8A, a plurality (9 in the illustrated example) of light guide holes 37-1 (A) to 37-9 (B) are formed in the light shielding cylinder 33c. The light shielding tube 60 has a plurality of (9 in the illustrated example) lamp selection holes 61-1 to 61- that are shifted in the axial direction so as to correspond to the circumferential position of the light guide hole 37 of the light shielding tube 33c. 9 is drilled. Then, by moving the cleaning mechanism 21 and moving the light shielding cylinder 60 in the direction of the arrow 63 in the figure, the lamp selection holes 61-1 to 61-9 and the light guide holes 37-1 (A) to 37-9 (B). ) Are selected, and the ultraviolet light emitted from the selected light receiving length of the ultraviolet lamp 14 is received by the light receiving unit 33a, and the ultraviolet intensity is individually measured.

  Since it is configured in this manner, as in the third embodiment, the light receiving portions 32a and 33a of the monitoring ultraviolet intensity meter 32 and the calibration ultraviolet intensity meter 33 are moved to the position of the flow path center plane 19, respectively. Strength can be measured. Therefore, since the ultraviolet intensity at the symmetrical position viewed from the ultraviolet lamps of the A group and the B group can be measured, the measurement accuracy can be increased. That is, the distance between the light receiving unit 32a and the light receiving lengths of the ultraviolet lamps 14- (A) and 14- (B) and the light receiving length of the light receiving unit 33a and the ultraviolet lamps 14- (A) and 14- (B). Therefore, the ultraviolet intensity of each ultraviolet lamp can be measured under the same conditions regardless of the transmittance of the target fluid. Thus, according to the present embodiment, as in the third embodiment, the total ultraviolet intensity, the individual ultraviolet intensity, and the calibration data can be related and measured with high accuracy. Further, in addition to the effect that highly accurate calibration data can be acquired and the like, since the cleaning mechanism 21 is used to move the light shielding tube 60, the moving mechanism can be simplified as compared with the third embodiment.

(Embodiment 5)
Although not shown, the light shielding cylinder 60 of the fourth embodiment can be applied in place of the light shielding cylinder 34 of the first embodiment shown in FIGS. According to this, in addition to the effects of the first embodiment, similarly to the second embodiment, the ultraviolet intensity can be individually measured and the calibration data can be acquired.

  As described above, in each embodiment of the present invention, nine medium-pressure mercury lamps having the same nominal output (electric input 120 W / cm, emission length 25 cm) are used so as to satisfy the required value of the total amount of ultraviolet output. An example was given. However, the present invention is not limited to this, and in accordance with the required value of the total amount of ultraviolet output, considering the irradiation performance in the ultraviolet irradiation region, it is possible to appropriately combine ultraviolet lamps having different nominal outputs. it can.

  Moreover, although the example which arrange | positions the several ultraviolet lamp 14 at equal intervals on the virtual cylinder 18 was shown, this invention is not restricted to this, The irradiation density of the ultraviolet-ray which the target fluid which distribute | circulates an ultraviolet irradiation area receives is equalized In order to satisfy this, it does not preclude disposing at unequal intervals on the virtual cylinder 18. Further, the ultraviolet lamp 14 can be configured using a low-pressure silver lamp.

  Moreover, although Embodiment 1-5 showed the example which has arrange | positioned the ultraviolet lamp 14 one by one in the same position of the circumferential direction, this invention is not restricted to this, As mentioned below, the position where circumferential direction differs For each, one or more UV lamps 14 can be arranged.

(Embodiment 6)
FIG. 9 shows a sixth embodiment in which the ultraviolet lamp arrangement of the present invention is different. The sixth embodiment is different from the first embodiment in the arrangement configuration of the lamp protection tube and the ultraviolet lamp, and the other configurations are the same as those in the first embodiment, so that the description is omitted as appropriate. FIG. 5A is a view of the arrangement of the ultraviolet lamp of the present embodiment as viewed from the inlet 6 side of the pipe 2 of the target fluid, and FIG. 5B is the same as FIG. 3 of the first embodiment. It is sectional drawing orthogonal to a lamp axis. The ultraviolet lamp arrangement configuration of the present embodiment is an example suitable for a relatively medium-sized ultraviolet irradiation device in which the pipe diameter of the pipe line 2 of the target fluid is larger than that of the first embodiment (for example, 600 to 1000 mm).

As shown in FIG. 9, a plurality of (six in the illustrated example) lamp protection tubes 13 of the present embodiment are the first lamp protection tubes 13 _I (in the illustrated example, in which one ultraviolet lamp 14 is accommodated). 2) and a second lamp protection tube 13 _II (four in the illustrated example) in which a plurality of (two in the illustrated example) ultraviolet lamps 14 are accommodated. Ultraviolet lamp 14 of the first lamp protective tube 13 in the _I, the axial center of the UV lamp 14, i.e. by positioning the flow path center plane 19 described the center of the emission length in the embodiment 1 are arranged symmetrically . A plurality of (two in the illustrated example) ultraviolet lamps 14 a and 14 b in the second lamp protection tube 13 _II are similarly arranged symmetrically with respect to the flow path center plane 19.

Thus, according to the present embodiment, a plurality of (two in the illustrated example) ultraviolet lamps 14a and b housed in the second lamp protection tube 13 _II are protected against the flow path center plane 19. Since they are arranged symmetrically in the axial direction, it is possible to equalize the ultraviolet irradiation amount for the target fluid flowing in the ultraviolet irradiation region of the inflow pipe 2. Moreover, since the ultraviolet lamps 14a and 14b in the cross section of the flow path can be widely dispersed in the lamp axis direction, the irradiation density can be improved, and the irradiation performance of the ultraviolet rays received by the target fluid flowing in the pipe line 2 can be improved.

Those in the present embodiment, a plurality of ultraviolet lamps 14a housed in the second lamp protective tube 13 _II, has been shifted symmetrically disposed b to the flow path center plane 19, the invention is not limited thereto is not. In short, a plurality of ultraviolet lamps 14a and 14b accommodated in the second lamp protection tube 13 _II may be distributed in the protection tube axis direction (lamp axis direction). For example, a plurality of lamps protective tube 13 _II to accommodated the ultraviolet lamp 14a, b which are arranged to overlap in the longitudinal flow direction of FIG. 9 (b), reducing the overlap of the protective tube axis direction of the light emitting length to each other Thus, it is preferable that the position is shifted in the protective tube axis direction.

  In the present embodiment, the number of the lamp protection tubes 13 is six. However, the present invention is not limited to this, and the number of the ultraviolet lamps 14 accommodated in one protection tube is increased by increasing the number. By reducing the number, it is possible to increase / decrease the amount of ultraviolet irradiation of the entire apparatus, and to improve the degree of design freedom. For example, by appropriately reducing the number of the ultraviolet lamps 14 accommodated in one protective tube as in the first embodiment, the entire ultraviolet irradiation amount of the apparatus can be satisfied and the ultraviolet irradiation density can be appropriately adjusted. . Furthermore, while increasing the number of the lamp protection tubes 13, the number of the ultraviolet lamps 14 accommodated in one protection tube can be appropriately reduced.

(Embodiment 7)
In FIG. 10, the ultraviolet lamp arrangement configuration of Embodiment 7 of the ultraviolet irradiation device of the present invention is shown. This embodiment is different from the first embodiment in the arrangement configuration of the lamp protection tube and the ultraviolet lamp, and the other configurations are the same as those in the first embodiment, and therefore the description is omitted as appropriate. FIG. 5A is a view of the arrangement of the ultraviolet lamp of the present embodiment as viewed from the inlet 6 side of the pipe 2 of the target fluid, and FIG. 5B is the same as FIG. 3 of the first embodiment. It is sectional drawing orthogonal to a lamp axis. The ultraviolet lamp arrangement configuration of the present embodiment is suitable for a relatively large ultraviolet irradiation apparatus in which the diameter of the inflow pipe 2 of the target fluid is larger than that of the first and sixth embodiments (for example, 1000 mm or more).

As shown in FIG. 10, the plurality of (eight in the illustrated example) lamp protection tube 13 of the present embodiment is a first lamp protection in which a plurality of (two in the illustrated example) ultraviolet lamps 14 are accommodated. A tube 13 _I (two in the illustrated example) and a second lamp protection tube 13 _II (six in the illustrated example) containing a plurality of (three in the illustrated) ultraviolet lamps 14 are provided. ing. Ultraviolet lamp 14 of the first lamp protective tube 13 within _I are arranged symmetrically to the center of the emission length of the ultraviolet lamp 14 to the flow path center plane 19 described in the first embodiment. A plurality (three in the illustrated example) of ultraviolet lamps 14 a, 14 b, 14 c in the second lamp protection tube 13 _II are similarly arranged symmetrically with respect to the flow path center plane 19.

As described above, according to the present embodiment, a plurality of (three in the illustrated example) ultraviolet lamps 14a, b, and c accommodated in the second lamp protection tube _13I are arranged with respect to the flow path center plane 19. Since they are arranged symmetrically with each other in the protective tube axial direction, it is possible to equalize the amount of ultraviolet irradiation with respect to the target fluid flowing in the target fluid inflow pipe 2. Further, since the ultraviolet lamps 14a, b, and c in the cross section of the flow path can be widely dispersed in the lamp axis direction, the irradiation density can be improved, and the irradiation performance of the ultraviolet rays received by the target fluid flowing in the pipe line 2 can be improved.

In this embodiment, a plurality of ultraviolet lamps 14a housed in the second lamp protective tube 13 _II, b, was staggered symmetrically c to the flow path center plane 19, the invention is limited thereto It is not something that can be done. In short, a plurality of ultraviolet lamps 14a, b, c accommodated in the second lamp protection tube 13 _II may be distributed in the protection tube axis direction (lamp axis direction). For example, an ultraviolet lamp 14a to be accommodated in the plurality of lamps protective tube 13 _II which is arranged to overlap in the longitudinal flow direction of FIG. 10 (b), b, c overlaps the protective tube axis direction of the light emitting length together It is preferable that the position is shifted in the direction of the protective tube axis so as to reduce the amount.

  In each of the above embodiments, the example in which the axis of the container 1 of the ultraviolet irradiation device is disposed sideways and the inflow pipe 2 for the target fluid is disposed sideways is shown. However, the present invention is not limited thereto. Instead, either one may be arranged vertically.

  In the sixth and seventh embodiments in which the lamp arrangement is changed, although not shown, a cleaning device for removing dirt attached to the outer surfaces of the lamp protection tube 13 and the strength meter protection tube 31 is provided as necessary. be able to. In addition, a monitoring ultraviolet intensity meter and a calibration ultraviolet intensity meter for measuring the individual ultraviolet intensity of each ultraviolet lamp 14 or the total ultraviolet intensity can be provided as necessary. When the monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter are provided in the sixth embodiment of FIG. 9, the configurations of the first to fifth embodiments can be used as they are.

  Further, when the monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter are provided in the seventh embodiment of FIG. 10, the configurations of the first to fifth embodiments can be used as they are. In addition, the UV intensity meter for monitoring is divided into a plurality of groups, and the light receiving part is moved to the center position of the UV lamp 14 for each group to measure the total UV intensity for each group. can do. Further, in the case of a calibration ultraviolet intensity meter, for example, the calibration ultraviolet intensity meter of Embodiment 3 in FIG. 7 is applied, and the light receiving unit is moved to the center position of a plurality of groups of ultraviolet lamps 14 having different axial positions. Thus, it is possible to individually measure the UV intensity of the UV lamp and obtain calibration data.

  Further, each ultraviolet lamp 14 is usually formed with filaments at both ends, and a cable for supplying electricity to the filaments is connected to electrode terminals drawn from both ends of the ultraviolet lamp 14. However, a type in which electrode terminals connected to the filaments at both ends are drawn from one side of the ultraviolet lamp 14 may be used. In the latter type of ultraviolet lamp 14, when two ultraviolet lamps 14 are accommodated in one lamp protection tube 13, a cable for supplying power to the ultraviolet lamp 14 does not come into contact with the high-temperature ultraviolet lamp 14. preferable. When three or more ultraviolet lamps 14 are accommodated in one lamp protective tube 13, the cable may come into contact with the high-temperature ultraviolet lamp 14, so that the glass fiber-covered cable or metal-coated cable with high heat resistance is high. May be used.

DESCRIPTION OF SYMBOLS 1 Container 2 Inflow pipe 6 Inlet 7 Outlet 10 Tube 11 End plate 13 Lamp protection pipe 14 Ultraviolet lamp 18 Virtual cylinder 19 Flow path center plane 21 Cleaning mechanism 22 Travel rail 23 Traveling carriage 24 Wiper holding member 25 Wiper 31 Strength meter Protective tube 32 UV intensity meter for monitoring 32a Light receiving portion 32b Support rod 32c Light blocking tube 33 UV intensity meter for calibration 33a Light receiving portion 33b Support rod 33c Light blocking tube 34 Light blocking tube 36 Light guide hole 37 Light guide hole 43 Light blocking tube 43a, 43b Lamp Selection hole 44 Light guide hole

Claims (7)

A cylindrical container, a plurality of transparent lamp protection tubes provided in the container dispersed in the circumferential direction of a virtual cylinder centering on the container axis of the container, and each of the lamp protection tubes accommodated An ultraviolet lamp, a transparent intensity meter protective tube provided in the container coaxially with the container axis , a monitoring ultraviolet intensity meter having a light receiving portion inserted into the intensity meter protective tube, and orthogonal to the container axis In an ultraviolet irradiation device provided with an inlet and an outlet that are provided at opposite positions of the cylindrical wall, and to which a circulation pipe of a target fluid is connected,
One or a plurality of the ultraviolet lamps are accommodated in the lamp protection tube, and a light emitting portion of the ultraviolet lamp accommodated in each of the lamp protection tubes passes through the center of the flow conduit and is orthogonal to the axis of the lamp protection tube. The monitoring ultraviolet intensity meter is received at a central position where the intensity meter protection tube intersects the flow channel center plane. A cylindrical light-shielding tube is provided surrounding the light-receiving portion, and the light-shielding tube has a plurality of light-guiding holes for guiding ultraviolet rays to the light-receiving portion by dispersing the light-shielding tube in an axial direction and a circumferential direction. The light guide hole is formed in the cylindrical wall, and each light guide hole guides the ultraviolet light emitted from the light receiving length set with reference to the light emission length center of each ultraviolet lamp to the light receiving unit according to the position of each ultraviolet lamp. UV light characterized by being provided at a position Cum apparatus. In the ultraviolet irradiation device according to claim 1,
A calibration ultraviolet intensity meter is inserted from the opposite end where the monitoring ultraviolet intensity meter is inserted into the intensity meter protective tube, and the light receiving portion of the calibration ultraviolet intensity meter is the light receiving portion of the monitoring ultraviolet intensity meter. A cylindrical first light-shielding tube is provided that is fixed at a position away from the light-receiving unit and surrounds the light-receiving portion of the calibration ultraviolet intensity meter, and the cylindrical second light-shielding tube that surrounds the first light-shielding tube moves in the axial direction. A plurality of light guide holes are formed in the cylinder wall for guiding the ultraviolet rays to the light receiving portion by dispersing the first light shielding cylinder in an axial direction and a circumferential direction, and each of the light guide holes is formed by each of the ultraviolet lamps. UV light emitted from the light receiving length set with reference to the center of the light emitting length is set to a position and a diameter for guiding the ultraviolet light to the light receiving portion according to the position of each ultraviolet lamp, and the second light shielding cylinder is the first light shielding cylinder A first position covering all the light guide holes of the cylinder and a second position exposing all of the light guide holes. In the ultraviolet irradiation apparatus characterized by comprising movably provided. In the ultraviolet irradiation device according to claim 1,
A calibration ultraviolet intensity meter is inserted from the opposite end where the monitoring ultraviolet intensity meter is inserted into the intensity meter protective tube, and the light receiving portion of the calibration ultraviolet intensity meter is the light receiving portion of the monitoring ultraviolet intensity meter A first light-shielding tube fixed at a position away from the light-receiving portion of the calibration ultraviolet intensity meter and a second light-shielding tube rotatable around the tube axis are provided in duplicate. A plurality of light guide holes are formed in the cylindrical wall of the light shielding cylinder to guide the ultraviolet rays to the light receiving portion in correspondence with the ultraviolet lamps having different positions in the lamp axial direction and in the circumferential direction, respectively. A position where a plurality of lamp selection holes are formed corresponding to the ultraviolet lamps at different positions in the lamp axis direction on the wall, and the light guide hole and the lamp selection holes are overlapped by changing the rotation angle of the second light shielding tube Irradiated from one ultraviolet lamp corresponding to The light guide hole or the lamp selection hole formed in the light-shielding cylinder provided on the light-receiving section side of the first light-shielding cylinder and the second light-shielding cylinder is formed so that ultraviolet light can be introduced into the light-receiving section. Each of the plurality of ultraviolet lamps accommodated in the lamp protection tube is provided at a position for guiding the ultraviolet rays irradiated from the light receiving length set with reference to the light emission length center of the ultraviolet lamp to the light receiving portion. UV irradiation device. In the ultraviolet irradiation device according to claim 1,
A first light shielding tube is fixedly provided on the intensity meter protection tube, and the monitoring ultraviolet intensity meter and the calibration ultraviolet intensity meter are inserted from both ends of the first light shielding tube, and the monitoring ultraviolet intensity meter and the The calibration ultraviolet intensity meter is configured such that each light receiving portion is movable between the center position where the intensity meter protection tube intersects the flow path center plane and a position retracted from the center position along the insertion direction. Provided,
A plurality of light guide holes that guide ultraviolet rays to the light receiving portion are formed in the cylindrical wall corresponding to the center position of the first light shielding cylinder so as to correspond to the ultraviolet lamps having different lamp axial directions and circumferential positions. Established,
The monitoring ultraviolet intensity meter is provided so as to be movable in the axial direction, and a second light shielding tube surrounding the light receiving portion of the monitoring ultraviolet intensity meter is fixed to the light receiving portion. A plurality of light guide holes for guiding ultraviolet rays to the light receiving portion corresponding to the ultraviolet lamps at different positions in the axial direction of the lamp are formed in the cylindrical wall,
A third light-shielding tube surrounding the light receiving portion of the calibration ultraviolet intensity meter is fixed to the light receiving portion, and the light receiving portion of the calibration ultraviolet intensity meter is rotatable about an axis and moved in the axial direction. A plurality of lamp selection holes are formed in the tube wall of the third light-shielding tube so as to correspond to the ultraviolet lamps at different positions in the lamp axis direction;
A first drive mechanism for moving the light receiving part of the monitoring ultraviolet intensity meter in the axial direction, a second drive mechanism for rotating the light receiving part of the calibration ultraviolet intensity meter around the axis, and a third drive for moving in the axial direction Mechanism is provided,
At the time of monitoring, the total UV intensity irradiated from all the UV lamps is measured by positioning the light receiving part of the UV intensity meter for monitoring at the center position,
At the time of acquisition of calibration data, the light receiving portion of the monitoring ultraviolet intensity meter is moved backward, the light receiving portion of the calibration ultraviolet intensity meter is positioned at the center position, and the light receiving portion is rotated to move the third light receiving portion . is formed to be introduced the ultraviolet rays irradiated from one of the ultraviolet lamps corresponding to the position of the lamp selected hole of the light shielding barrel provoking superimposed on the light guide holes of the first light-shielding tube on the light-receiving portion,
The light guide hole of the second light shielding tube and the lamp selection hole of the third light shielding tube are set based on the light emission length center of one or a plurality of the ultraviolet lamps respectively accommodated in the lamp protection tube. An ultraviolet irradiation device, characterized in that the ultraviolet irradiation device is provided at a position for guiding ultraviolet rays irradiated from a light receiving length to the light receiving portion. In the ultraviolet irradiation device according to claim 1,
A calibration ultraviolet intensity meter is inserted from the opposite end where the monitoring ultraviolet intensity meter is inserted into the intensity meter protective tube, and the light receiving portion of the calibration ultraviolet intensity meter is the light receiving portion of the monitoring ultraviolet intensity meter. A cylindrical first light-shielding tube is provided that is fixed at a position away from the light-receiving unit and surrounds the light-receiving portion of the calibration ultraviolet intensity meter, and the cylindrical second light-shielding tube that surrounds the first light-shielding tube moves in the axial direction. UV light emitted from a light receiving length set on the basis of the light emission length center of each ultraviolet lamp is distributed to the cylindrical wall of the first light shielding cylinder in the axial direction and the circumferential direction. A plurality of guiding light guide holes are formed, and each of the light guiding holes is provided at a position for guiding the ultraviolet light emitted from the light receiving length to the light receiving unit according to the position of each lamp protection tube, and the second light shielding The tube is shifted in the axial direction and circumferential direction of the tube wall, and the guide of the first light shielding tube is It is formed by drilling a plurality of lamps selected holes at positions corresponding to the positions of the holes, and the ultraviolet irradiation apparatus characterized by comprising movable in the axial direction. In the ultraviolet irradiation device according to any one of claims 1 to 5,
A plurality of traveling rails provided across both ends of the container; a plurality of traveling carriages provided so as to be able to travel on the traveling rail; a wiper holding member supported by the traveling carriage; and the wiper holding A wiper supported by a member and fitted to the outer peripheral surface of each of the lamp protection tube and the strength meter protection tube; and the outer periphery of the lamp protection tube and the strength meter protection tube by running the traveling carriage. And a cleaning mechanism that slides on
The wiper has a brush part formed in a disk shape having an inner diameter loosely fitted on the outer periphery of the lamp protection tube and the strength meter protection tube, and a brush holding member having an annular groove for loosely holding the outer peripheral edge of the brush part And an ultraviolet irradiation device characterized by being supported by the wiper holding member via the brush holding member. In the ultraviolet irradiation device according to claim 2,
A plurality of traveling rails provided across both ends of the container; a plurality of traveling carriages provided so as to be able to travel on the traveling rail; a wiper holding member supported by the traveling carriage; and the wiper holding A wiper supported by a member and fitted to the outer peripheral surface of each of the lamp protection tube and the strength meter protection tube; and the outer periphery of the lamp protection tube and the strength meter protection tube by running the traveling carriage. And a cleaning mechanism that slides on
The wiper has a brush part formed in a disk shape having an inner diameter loosely fitted on the outer periphery of the lamp protection tube and the strength meter protection tube, and a brush holding member having an annular groove for loosely holding the outer peripheral edge of the brush part And is supported by the wiper holding member via the brush holding member,
The second light shielding tube is provided so as to surround an outer periphery of the strength meter protection tube and is supported by the wiper holding member, and is provided between the first position and the second position by the cleaning mechanism. An ultraviolet irradiation device that is moved.

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