JP4438248B2 - UV irradiation equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ultraviolet irradiation apparatus that performs sterilization, disinfection of bacteria, etc. in a liquid to be treated by ultraviolet irradiation, or treatment such as oxidative decomposition of a trace amount organic substance or decomposition of a hardly decomposable organic substance. It is related with the improvement of the ultraviolet irradiation apparatus which can wash | clean the contact surface with the to-be-processed liquid of the light transmissive partition walls, such as a light source protective tube and a water flow pipe.
[0002]
[Prior art]
Ultraviolet irradiation equipment or systems that perform sterilization and sterilization of bacteria in the liquid to be treated by ultraviolet irradiation are semiconductor industry pure water production line, pharmaceutical industry aseptic water production line, food industry water sterilization line, It is applied in various fields such as aquaculture water sterilization line, drainage / sewage treatment line, pool water treatment line, and cooling tower circulating water treatment line. This type of ultraviolet irradiation device is roughly classified into an internal irradiation type ultraviolet irradiation device and an external irradiation type ultraviolet irradiation device according to the irradiation method of the ultraviolet light to the liquid to be treated. An internally-illuminated ultraviolet irradiation device has an ultraviolet light source inserted in a light-transmitting light source protective tube arranged in a liquid-tight manner in a sealed tube through which a liquid to be treated is passed, and the ultraviolet light source from the inside of the protective tube The treatment liquid is irradiated with ultraviolet rays. The external illumination type ultraviolet irradiation device arranges an ultraviolet light source outside a light-transmitting water passage through which a liquid to be treated is passed, and irradiates the liquid to be treated in the water passage from the outside of the water passage with the ultraviolet light source. Is.
[0003]
In each of the above ultraviolet irradiation devices, the ultraviolet light source and the liquid to be processed are separated by a partition such as a light-transmitting protective tube or water pipe. Dirt such as scale (calcium, magnesium, iron, aluminum, phosphorus, organic matter, etc. in the liquid to be processed), oil, and suspended solids gradually adheres to the surface of the pipe or water pipe that contacts the liquid to be processed. The dirt adhering to the contact surface shields the ultraviolet rays emitted from the ultraviolet light source, thereby causing a decrease in sterilization efficiency, photoreaction efficiency, and the like. For this reason, when a predetermined treatment effect is to be obtained for the liquid to be treated, the energy required for the treatment effect is increased and the flow of the liquid to be treated is stopped in order to clean the attached dirt. It was necessary to do so and the driving efficiency was lowered.
[0004]
Therefore, conventionally, a cleaning device is provided in the ultraviolet irradiation device, and the cleaning device regularly cleans dirt adhering to the contact surface into the water to be treated. FIG. 4 shows an example of an internally illuminating ultraviolet irradiation device including a cleaning device. In FIG. 4, both ends of the cylinder 41 are watertightly sealed by seal portions 41a and 41b, and the liquid to be treated taken from the treated water inlet 48 is passed through the cylinder 41 and discharged from the treated water discharge port 49. In this cylinder 41, a light-transmissive protective tube 42 made of quartz glass is watertightly installed on the seal portions 41a and 41b with seal members 44a and 44b, and an ultraviolet light source 43 is inserted into the protective tube 42. The ultraviolet light source 43 irradiates the liquid to be processed that passes through the cylinder 41 with ultraviolet rays, and performs processing such as sterilization and disinfection of bacteria in the liquid to be processed. During the treatment of the liquid to be treated, a cleaning tool 45 such as a brush is installed so as to be in close contact with the outer surface of the protective tube in order to clean dirt that has gradually adhered to the outer surface of the protective tube 42. The cleaning tool 45 is connected to the sealing portions 41a and 41b of the cylinder 41 with a cleaning rod 46 that is watertightly installed by a sealing material 47, and moves the cleaning rod 46 up and down in the longitudinal direction of the protective tube 42. Thus, the cleaning tool 45 cleans the dirt on the outer surface of the protective tube. As a driving means for the cleaning tool 45, a piston, a motor, and the like are used as appropriate in order to automatically drive the cleaning tool 45, in addition to manual operation.
[0005]
[Problems to be solved by the invention]
In the conventional internally-illuminated ultraviolet treatment apparatus, since the cleaning tool and the cleaning rod for driving the cleaning tool are present in the liquid to be processed, the water flow resistance of the liquid to be processed increases and the loss head increases. There was a problem of inviting. In addition, dirt in the liquid to be treated may also adhere to the cleaning tool and the cleaning rod, causing a malfunction. In addition, since the cleaning rod requires a waterproof seal, the configuration of the apparatus is complicated. In addition, the cleaning rod is usually manufactured using a metal material such as iron or steel. However, if the liquid to be processed containing chemicals that corrode the cleaning rod or the liquid to be processed such as seawater is treated, the cleaning rod is washed. Since the rod corrodes, there is a problem that the metal cleaning rod cannot be applied to the treatment of the liquid to be treated.
The external illumination type ultraviolet irradiation device has a structure that irradiates the liquid to be treated in the water pipe with ultraviolet light by an ultraviolet light source arranged outside the light permeable water pipe. It is necessary to sufficiently irradiate the flowing liquid to be treated, and there is a situation that the diameter of the water pipe cannot be made too large. Therefore, in the external illumination type ultraviolet irradiation device, it is more difficult to provide a cleaning device in the water conduit than in the case of the internal illumination device. Therefore, if dirt adheres to the inner surface of the water conduit, the liquid to be treated is passed. The water was stopped and the water pipe was removed and washed.
[0006]
The present invention has been made in view of the above points, and cleaning a contact surface of a light-transmitting partition that comes into contact with the liquid to be processed from a non-contact surface side that does not come into contact with the liquid to be processed. It is an object of the present invention to provide an ultraviolet irradiation device that can be used.
[0007]
[Means for Solving the Problems]
An ultraviolet irradiation apparatus according to the present invention is an ultraviolet irradiation apparatus for treating a liquid to be treated by irradiating ultraviolet light from the ultraviolet light source onto a liquid to be treated which is separated from an ultraviolet light source and a light-transmitting partition wall. A cleaning member for cleaning the contact surface of the light-transmitting partition that contacts the liquid to be processed, and a drive member driven along a non-contact surface of the light-transmitting partition that does not contact the liquid to be processed. The cleaning member and the driving member are magnetically coupled via the light-transmitting partition. According to this, since the cleaning member can be driven along the contact surface of the light transmissive partition wall by the driving member on the non contact surface side of the light transmissive partition wall, the cleaning member can be driven from the non contact surface side of the light transmissive partition wall. The contact surface of the light transmissive partition can be cleaned.
[0008]
As described above, the ultraviolet irradiation device is roughly classified into an internal irradiation type ultraviolet irradiation device and an external irradiation type ultraviolet irradiation device according to the irradiation method of the ultraviolet ray to the liquid to be processed. In the case of an internally-illuminated ultraviolet irradiation device, the light transmissive partition is a light source protective tube for inserting the ultraviolet light source, and the drive member is provided inside the light source protective tube. A sealed tube for passing the liquid to be treated can be further provided on the contact surface side, and the cleaning member can be provided inside the sealed tube. Further, in the case of an external illumination type ultraviolet irradiation device, the light transmissive partition wall is a water pipe through which the liquid to be treated passes, and the ultraviolet light source is provided outside the water pipe and the light transmissive partition wall is in contact therewith. The cleaning member may be provided on the surface side, and the driving member may be provided on the non-contact surface side of the light transmissive partition wall.
[0009]
[Embodiments of the Invention]
Hereinafter, the present embodiment will be described with reference to the accompanying drawings.
FIG. 1 shows a schematic configuration showing an embodiment of an internally-illuminated ultraviolet irradiation device to which the present invention is applied, (a) is a schematic sectional view of the device, and (b) is a line II of (a). It is an expanded sectional view.
In FIG. 1, both ends of the cylinder 1 are hermetically sealed by seal portions 1 a and 1 b, and the liquid to be treated taken from the treated water inlet 8 is passed through the cylinder 1 and discharged from the treated water discharge port 9. In the cylinder 1, a light-transmitting protective tube 2 made of quartz glass is watertightly installed on the seal portions 1a and 1b by seal materials 4a and 4b. The protective tube 2 has an ultraviolet light source 3 inserted therein. The ultraviolet light source 3 irradiates the liquid to be processed passing through the cylinder 1 with ultraviolet rays to sterilize and disinfect bacteria in the liquid to be processed. Perform the process. In the protective tube 2, the cleaning tool 5 is arranged on the outer surface of the protective tube that comes into contact with the liquid to be treated, and the magnet 10 connected to the metal cleaning rod 6 is arranged on the inner surface of the protective tube that does not come into contact with the liquid to be treated. The As will be described later, the cleaning tool 5 includes a ferromagnetic material such as magnetic stainless steel or iron, and is magnetically coupled to the magnet 10 via the protective tube 2.
[0010]
FIG. 2 shows a specific configuration example of the cleaning tool 5. The cleaning tool 5 includes a plurality of divided ferromagnetic bodies 11 made of a ferromagnetic material such as magnetic stainless steel or iron. In this example, in consideration of processing a liquid to be processed including chemicals and a liquid to be processed such as seawater with an ultraviolet irradiation device, the plurality of ferromagnetic bodies 11 are made of UV-resistant Teflon (PTFE, PFA, FEP). Etc.) or rubber (EPDM, Viton (trademark), etc.) or the like. That is, as shown in FIGS. 2 (a) and 2 (b), the cleaning tool 5 is arranged by dividing a plurality of ferromagnetic bodies 11 on a predetermined circumference corresponding to the outer diameter of the protective tube 2, These ferromagnetic bodies 11 are formed in a ring shape by covering them with a covering material 12. Further, as shown in FIG. 2B, the cleaning tool 5 is provided with a slit 5a that is cut obliquely at a part thereof. By providing the slit 5a in a part of the cleaning tool 5, when the cleaning tool 5 is attached to the protective tube 2, the outer diameter tolerance of the protective tube 2 can be absorbed and brought into close contact with the outer surface of the protective tube. Can be eliminated. Further, as shown in FIG. 2C, lip-shaped ridges 5b and 5c that are in contact with the outer surface of the protective tube are formed on the upper and lower inner peripheral edges of the cleaning tool 5. As described above, by providing the protrusions 5b and 5c on the upper and lower inner peripheral edges of the cleaning tool 5, the attached dirt on the outer surface of the protective tube can be scraped off, and the cleaning effect can be enhanced.
[0011]
As shown in FIG. 1B, the magnet 10 is formed in a ring shape corresponding to the inner diameter shape of the protective tube 2 and the outer diameter shape of the ultraviolet light source 3. As the magnet 10, a magnet having a strong holding force and a high energy density (magnetic density) is appropriately selected. Usually, a ferrite-based bonded magnet is used. However, when the cleaning resistance due to adhesion dirt is large, a neodymium-based bonded magnet having a higher energy density can be appropriately used.
[0012]
In the ultraviolet irradiation apparatus shown in this example, when cleaning dirt such as scale, oil, suspended matter, etc. adhering to the outer surface of the protective tube, the length of the protective tube 2 is adjusted manually by using a cleaning rod 6 or a driving source such as a piston or a motor. When driven up and down in the axial direction, the magnet 10 is moved up and down in the same direction along with the cleaning rod 6 along the inner surface of the protective tube. Since the cleaning tool 5 is magnetically coupled to the magnet 10 via the protective tube 2, the cleaning tool 5 is driven up and down along the outer surface of the protective tube 2 following the movement of the magnet 10. At that time, the protrusions 5b and 5c of the cleaning tool 5 are cleaned by scraping off the dirt on the outer surface of the protective tube. As described above, the protrusions 5b and 5c of the cleaning tool 5 are formed by the covering material 12 such as the Teflon material or the rubber material that covers the plurality of ferromagnetic bodies 11 such as magnetic stainless steel. Dirt adhering to the outer surface of the tube can be effectively removed without damaging the protective tube 2.
[0013]
In the internally-illuminated ultraviolet irradiation device of this example, the cleaning tool 5 is disposed outside the protective tube 2, and the magnet 10 for driving the cleaning tool 5 and the cleaning rod 6 for driving the magnet 10 are protected tube. Therefore, the water flow resistance of the cleaning tool driving mechanism including the magnet 10 and the cleaning rod 6 does not occur in the liquid to be processed passing between the protective tube 2 in the cylinder 1. Therefore, it is possible to clean the dirt adhering to the outer surface of the protective tube without increasing the loss head of the liquid to be treated by the cleaning tool driving mechanism. In addition, since dirt in the liquid to be treated does not adhere to the cleaning rod 6, it is possible to prevent malfunction of the cleaning tool drive mechanism and to perform stable operation. In addition, since the sealing material for the cleaning rod 6 is not required, the configuration of the apparatus can be simplified, and maintenance such as replacement of the sealing material is not required, and the maintenance and management of the apparatus is facilitated. In addition, since the cleaning tool 5 is configured by covering the magnetic body 11 with a covering material 12 such as an ultraviolet-resistant resin material or an ultraviolet-resistant rubber material, the liquid to be treated including chemicals or seawater is covered. The treatment solution can be irradiated with ultraviolet rays. Therefore, it is possible to continuously perform the ultraviolet irradiation treatment without reducing the ultraviolet irradiation efficiency of the liquid to be treated, which has been difficult when using a metal cleaning tool, thereby reducing the operating cost. it can. In the internally illuminating ultraviolet irradiation device of the present embodiment, the installation location of the magnet 10 is not limited to the inside of the protective tube 2 and may be installed outside the cylinder 1.
[0014]
FIG. 3 shows a schematic configuration showing an embodiment of an external illumination type ultraviolet irradiation device to which the present invention is applied, (a) is a schematic sectional view of the device, and (b) is a II-II line of (a). It is sectional drawing. In addition, since the cleaning tool 26 and the magnet 28 used in the external irradiation type ultraviolet irradiation device of this example have the same configuration as that described in the above-described internal irradiation type ultraviolet irradiation device, description thereof will be omitted.
In FIG. 3, the light-transmitting water conduit 21 has a treated water inlet 22 and a treated water outlet 23, and allows the liquid to be treated taken from the treated water inlet 22 to pass through the water pipe 21 to be treated water outlet. 23 is discharged. A plurality (four in the illustrated example) of ultraviolet light sources 24 are arranged outside the water pipe 21, and these ultraviolet light sources 24 irradiate the liquid to be treated that passes through the water pipe 21 with ultraviolet rays. Processing such as sterilization and disinfection of bacteria in the liquid to be treated is performed. The irradiation part in which the ultraviolet light source 24 is arranged is covered with a cover 25, and ultraviolet irradiation to the outside is prevented. In the water pipe 21, a cleaning tool 26 is arranged on the inner surface of the water pipe that comes into contact with the liquid to be treated, and a magnet 28 connected to a metal washing rod 27 is arranged on the outer surface of the water pipe that does not come into contact with the liquid to be treated. The The cleaning tool 26 includes a ferromagnetic material such as magnetic stainless steel or iron, and is magnetically coupled to the magnet 28 via the water conduit 21.
[0015]
In the external irradiation type ultraviolet irradiation apparatus shown in this example, when cleaning dirt such as scale, oil, suspended matter, etc. adhering to the inner surface of the water pipe, the water pipe is used either manually or by using a driving source such as a piston or a motor. When driven up and down in the major axis direction of 21, the magnet 28 is moved up and down in the same direction along with the cleaning rod 27 along the outer surface of the water pipe. Since the cleaning tool 26 is magnetically coupled to the magnet 28 via the water conduit 21, the cleaning tool 26 is driven up and down along the outer surface of the water conduit 21 following the movement of the magnet 28. At that time, a protrusion (not shown) of the cleaning tool 26 removes dirt on the inner surface of the water pipe and cleans it. As described above, the protrusions of the cleaning tool 26 are coated with a plurality of ferromagnetic materials (not shown) such as magnetic stainless steel (not shown), such as UV-resistant Teflon or UV-resistant rubber (not shown). Therefore, the dirt adhering to the inner surface of the water pipe can be effectively removed without damaging the water pipe 21.
[0016]
In the external illumination type ultraviolet irradiation device of this example, a cleaning tool 26 is disposed inside the water pipe 21, and a magnet 28 for driving the cleaning tool 26 and a cleaning rod 27 for driving the magnet 28 are passed through the water pipe. Since it arrange | positions outside 21, the water flow resistance of the to-be-processed liquid which passes the inside of the water flow pipe 21 is slight. For this reason, the stain | pollution | contamination adhering to a water pipe inner surface can be wash | cleaned, without causing the increase in the loss head of the to-be-processed liquid by the cleaning tool 26. In addition, since dirt in the liquid to be treated does not adhere to the cleaning rod 27, it is possible to prevent a malfunction of the cleaning tool drive mechanism including the cleaning rod 27 and the magnet 28, and to perform stable operation. Can do. In addition, since the sealing material for the cleaning rod 27 is not required, the configuration of the apparatus can be simplified, and maintenance such as replacement of the sealing material is not required, and the maintenance and management of the apparatus is facilitated. Further, since the cleaning tool 26 is configured by covering the magnetic material with a coating material such as an ultraviolet-resistant resin material or an ultraviolet-resistant rubber material, a liquid to be processed including chemicals or a liquid to be processed such as seawater. Can be irradiated with ultraviolet rays. Therefore, it is possible to continuously perform the ultraviolet irradiation treatment without reducing the ultraviolet irradiation efficiency of the liquid to be treated, which has been difficult when using a metal cleaning tool, thereby reducing the operating cost. it can. Therefore, also in the external irradiation type ultraviolet irradiation device of this example, the same effect as the above-described internal irradiation type ultraviolet irradiation device can be obtained.
[0017]
Since the internally-illuminated ultraviolet irradiation device shown in the present embodiment can drive the cleaning tool 5 using the magnetic force of the magnet 10, the cleaning tool driving mechanism including the cleaning rod 6, the magnet 10 and the like is light-transmitting. Therefore, it is possible to arrange the cleaning tool drive mechanism in a simplified manner, to stabilize the drive, and to improve the durability. In addition, since the cleaning tool 5 is configured by covering the magnetic body 11 with a covering material 12 such as an ultraviolet-resistant resin material or an ultraviolet-resistant rubber material, the liquid to be treated including chemicals or seawater is covered. An ultraviolet irradiation treatment of the treatment liquid can be performed. Also, in the external irradiation type ultraviolet irradiation device, since the cleaning tool 26 can be driven by using the magnetic force of the magnet 28, the cleaning tool driving mechanism including the cleaning rod 27 and the magnet 28 is used as a light-transmitting water pipe. It is possible to dispose the cleaning tool drive mechanism in a simplified manner, drive stability, and durability. Further, since the cleaning tool 26 is configured by covering the magnetic material with a coating material such as an ultraviolet-resistant resin material or an ultraviolet-resistant rubber material, a liquid to be processed including chemicals or a liquid to be processed such as seawater. UV irradiation treatment can be performed.
[0018]
In each ultraviolet irradiation device shown in the present embodiment, quartz glass is usually used as the material of the protective tube 2 or the water flow tube 21, but the dirt peeling resistance is reduced and the movement resistance of the cleaning tools 5 and 26 is reduced. Therefore, it is preferable to use a Teflon tube that is transmissive to ultraviolet rays such as FEP. However, since the pressure resistance of the Teflon tube itself is not so high, when the pressure is high, it is preferable to use a quartz glass tube with a Teflon coating having a thickness of about 0.5 to 1.0 mm on the outer surface. . Further, as the cleaning tools 5 and 26, a brush made of a metal material or the like can be used according to the type of dirt.
[0019]
【The invention's effect】
As described above, according to the ultraviolet irradiation device of the present invention, the cleaning member can be driven along the contact surface of the light transmissive partition wall by the driving member on the non-contact surface side of the light transmissive partition wall. Therefore, the contact surface of the light transmissive partition wall can be cleaned from the non-contact surface side of the light transmissive partition wall.
[Brief description of the drawings]
FIG. 1 shows a schematic configuration showing an embodiment of an internally-illuminated ultraviolet irradiation device, (a) is a schematic sectional view of the device, and (b) is an enlarged sectional view taken along line II of (a).
FIGS. 2A and 2B show a configuration example of a cleaning tool, wherein FIG. 2A is a plan view of the cleaning tool, FIG. 2B is a perspective view of the cleaning tool, and FIG. 2C is a cross-sectional view of the cleaning tool.
FIG. 3 shows a schematic configuration showing an embodiment of an external irradiation type ultraviolet irradiation device, (a) is a schematic sectional view of the device, and (b) is a sectional view taken along line II-II of (a).
FIGS. 4A and 4B show a schematic configuration of an example of a conventional internal-illumination ultraviolet irradiation device, in which FIG. 4A is a schematic configuration cross-sectional view of the device, and FIG.
[Explanation of symbols]
2 Protective pipes 5, 26 Cleaning tools 6, 27 Cleaning rods 10, 28 Magnets 12 Covering material 21 Water pipe

Claims (11)

In the ultraviolet irradiation apparatus for treating the liquid to be treated by irradiating the ultraviolet ray from the ultraviolet light source onto the liquid to be treated separated from the ultraviolet light source and the light-transmitting partition wall,
A cleaning member for cleaning a contact surface of the light-transmitting partition that contacts the liquid to be processed; and a drive member driven along a non-contact surface of the light-transmitting partition that does not contact the liquid to be processed. An ultraviolet irradiation apparatus, wherein the cleaning member and the driving member are magnetically coupled via the light-transmitting partition.   2. The ultraviolet irradiation apparatus according to claim 1, wherein the light transmissive partition wall is a light source protection tube in which the ultraviolet light source is inserted, and the driving member is provided inside the light source protection tube.   The ultraviolet irradiation device according to claim 1 or 2, further comprising a sealed tube for passing the liquid to be treated on the contact surface side of the light transmissive partition wall, and further comprising the cleaning member inside the sealed tube. .   2. The ultraviolet processing apparatus according to claim 1, wherein the light permeable partition wall is a water pipe through which the liquid to be treated is passed, and the ultraviolet light source is provided outside the water pipe.   5. The ultraviolet irradiation apparatus according to claim 1, wherein the cleaning member is provided on a contact surface side of the light transmissive partition wall, and the driving member is provided on a non-contact surface side of the light transmissive partition wall.   6. The ultraviolet irradiation device according to claim 1, wherein a material of the light transmissive partition is Teflon resin.   6. The ultraviolet irradiation apparatus according to claim 1, wherein a material of the light transmitting partition is quartz glass, and the contact surface of the quartz glass is coated with Teflon.   The ultraviolet irradiation apparatus according to claim 1, wherein the cleaning member includes a magnetic body, and the driving member is a magnet coupled to the magnetic body.   9. The ultraviolet irradiation apparatus according to claim 1, wherein the cleaning member includes a magnetic body and an ultraviolet resistant coating material that covers the magnetic body.   The ultraviolet irradiation device according to claim 9, wherein the ultraviolet-resistant coating material that coats the magnetic material is a resin material or a rubber material.   The ultraviolet irradiation device according to claim 1, wherein the cleaning member includes a slit in a part thereof.

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