JP2022104169A - Ultraviolet irradiation device - Google Patents

Abstract

To efficiently treat liquid to be treated flowing in a water channel with ultraviolet ray.SOLUTION: An irradiation assembly (10) includes a body (11) and an ultraviolet lamp (12). In the body (11), an upper surface (11a) and a lower surface (11b) are opened, a side surface (11c) is closed, and an inner surface of the side surface is formed as a reflective surface. The ultraviolet lamp (12) is arranged in the body (11) in a state of being housed in a protective tube (13) having liquid-tightness and ultraviolet transmission. The irradiation assembly (10) is placed in an open channel through which liquid to be treated flows, and the liquid to be treated passing through the body is irradiated with ultraviolet rays emitted by an ultraviolet lamp and a reflected light from a reflecting surface, with one of the openings on the upper surface and the lower surface of the body as an inlet and the other as an exit. The irradiation assembly (10) is inserted into a rectifying body (20). The rectifying body (20) is configured so that the liquid to be treated that has entered from the inlet portion (21) passes through the body-shaped body (11) inside the rectifying body (20) in a vertical direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to an in-waterway installation type ultraviolet irradiation device suitable for efficiently treating (disinfecting, sterilizing, etc.) the liquid to be treated flowing through the waterway.

A type of ultraviolet irradiation device installed in a water channel (for example, an open channel) through which a liquid to be treated flows has been conventionally known, and examples thereof include those shown in Patent Documents 1 and 2 below. Conventionally known UV irradiation devices installed in waterways are mainly suitable for sewage treatment, and few are suitable for water purification treatment. For example, in order to make it suitable for water purification treatment, it is required to increase the efficiency of ultraviolet irradiation of the water to be treated, but for that purpose, it is necessary to increase the arrangement density of the ultraviolet lamps, which increases the cost. Tend. On the other hand, in pure water generation equipment, an ultraviolet lamp is placed in a highly pressure-resistant closed container such as a stainless steel tank, and the pressurized liquid to be treated is introduced into the closed container. It is also widely known to perform ultraviolet treatment (for example, Patent Document 3 below). However, equipment using such a high pressure resistant closed container tends to be costly.

Japanese Patent Laid-Open No. 10-309568 JP 2001-29948 JP 2007-275825

An object of the present invention is to provide an ultraviolet irradiation device suitable for efficiently treating a liquid to be treated flowing in a water channel with ultraviolet rays.

The ultraviolet irradiation device according to the present invention is a body in which the upper surface and the lower surface are open and the side surfaces are closed, and the inner surface of the side surface is formed as a reflective surface, and the liquidtightness and ultraviolet transmission are transmitted. It comprises an irradiation assembly that includes an ultraviolet lamp that is placed inside the body while housed in a protective tube having the property, the irradiation assembly is placed in a water channel through which the liquid to be treated flows, and the body The liquid to be treated is irradiated with ultraviolet rays emitted by the ultraviolet lamp and reflected light from the reflecting surface, with one of the openings on the upper surface and the lower surface as an inlet and the other as an exit. ..

The irradiation assembly includes an ultraviolet lamp and a body for accommodating the ultraviolet lamp, and the body has an open upper surface and a lower surface and a closed side surface. The irradiation assembly is arranged in the water channel and has a configuration suitable for allowing the liquid to be treated to pass vertically in the body. Further, since the inner surface of the side surface of the body is formed as a reflective surface, the ultraviolet rays radiated from the ultraviolet lamp housed therein are reflected inward by the reflective surface, whereby the inside of the body is formed. It is possible to efficiently irradiate the liquid to be treated passing through the above with ultraviolet rays. This can save the number and / or power of the UV lamps placed in the body.

The UV irradiation apparatus according to the present invention may further include a rectifying body surrounding the irradiation assembly, wherein the rectifying body includes an open entrance and a surrounding wall, and one of the upper surface or the lower surface of the tubular body. Encloses the irradiation assembly with the surrounding wall of the rectifying body, and the fluid to be treated entering from the inlet of the rectifying body encloses the irradiation assembly with the other entering the rectifying body and facing the outside of the rectifying body. Guided by a wall, it may be configured to enter or exit one of the upper or lower surfaces of the body of the irradiation assembly. The rectifying body may further include an insertion slot, through which the tubular body of the irradiation assembly is inserted into the rectifying body, and one of the upper surface or the lower surface of the tubular body is the rectifying body. The rectifier may be attached to the irradiation assembly while entering the body and facing the outside of the rectifier through the insertion slot.

According to this, by providing a rectifying body so as to surround the irradiation assembly separately from the body forming the irradiation assembly, the liquid to be treated flowing through the water channel by the combination of both (body and rectifying body). Can provide a unitized UV irradiator configured to effectively pass through the irradiation assembly. In the case of an ultraviolet irradiation device unitized including such a rectifying body, it is introduced into the irradiation assembly by a predetermined rectifying action by the rectifying body, regardless of the environment where it is placed in the water channel. It has the effect that the state (amount, speed, etc.) of the fluid to be treated can be made uniform as much as possible. Therefore, if the processing performance of this UV irradiation device is specified by the power of the lamp and the physical structure of the unit, no matter what environment the waterway is placed in, the environment of the waterway will not be severely affected. It is expected that the processing performance satisfying a given regulation can be exhibited as much as possible.

In addition, such a unitized ultraviolet irradiation device makes it possible to arrange one or more units according to the size (width, etc.) of the water channel to be applied, so that various liquid treatments installed in the water channel can be treated. It can be applied efficiently in a plant. In addition, by combining both the body and the rectifying body, it is possible to assemble an appropriate intake and discharge arrangement structure, and it is possible to install this ultraviolet irradiation device in accordance with various differences in the waterway environment. That is, the inlet of the rectifying body surrounding the irradiation assembly can be appropriately arranged according to the intake environment in the water channel to which it is applied. This realizes standardization of the irradiation assembly (that is, standardization is performed so that the liquid to be treated is passed in the vertical direction in the body with the upper surface and the lower surface of the body as openings). It means that the standardized irradiation assembly can be applied in any waterway environment. Therefore, not only improvement and efficiency of processing performance but also cost saving by standardization can be expected.

According to a preferred embodiment, a saucer for receiving the subsidence may be arranged at the bottom of the rectifying body. Such a saucer helps to safely and quickly retrieve the damaged pieces in the unlikely event that the UV lamp in the irradiation assembly is damaged.

The perspective view which shows one Example of the ultraviolet irradiation apparatus which concerns on this invention. The perspective view which extracts the ultraviolet lamp arranged in the irradiation assembly of FIG. 1, and enlarges and shows the arrangement example. FIG. 6 is a perspective view illustrating an example of a rectifying fluid combined with the irradiation assembly of FIG. As an embodiment of the ultraviolet irradiation device according to the present invention, a perspective view illustrating a state in which the irradiation assembly of FIG. 1 and the rectifier of FIG. 3 are combined. A partial cross-sectional side view illustrating a state in which the ultraviolet irradiation device according to the present invention is installed in a water channel. A partial cross-sectional side view showing a modified example of FIG. A partial cross-sectional side view showing a modified example of FIG. As another embodiment of the ultraviolet irradiation device according to the present invention, a perspective view illustrating a state in which a plurality of units composed of a combination of an irradiation assembly and a rectifying body are arranged side by side. Partially exploded perspective view showing an embodiment in which a reflective surface of an irradiation assembly is formed by a removable reflector. FIG. 9 is a partially cross-sectional / partially enlarged perspective view showing an example of a U-shaped groove or a slit installed in the side frame in the embodiment of FIG. A partially exploded perspective view showing another embodiment in which the reflective surface of the irradiation assembly is detachably configured. 11 is an enlarged exploded perspective view showing an example of a multi-layer structure of a side surface of a body of an irradiation assembly in the embodiment of FIG. 11 is an enlarged perspective view showing another structural example of the side surface of the body of the irradiation assembly in the embodiment of FIG.

In FIG. 1, the ultraviolet irradiation device 1 according to an embodiment of the present invention includes an irradiation assembly 10. The irradiation assembly 10 includes a body 11 and one or more UV lamps 12 arranged within the body 11. In the body 11, the upper surface 11a and the lower surface 11b are open, the side surface 11c is completely closed, and the inner surface of the side surface 11c is formed as a reflective surface. In the illustrated example, the body 11 has a square shape in which the side surface 11c is composed of four flat surfaces. In such a square-shaped body 11, since the four surfaces forming the side surface 11c are flat surfaces, the reflective surfaces formed on the inner surfaces of the flat surfaces are each simple flat reflectors. It is advantageous because it can be formed by. However, the shape is not limited to this, and the shape of the side surface 11c of the body 11 may be cylindrical, or may be arbitrary, such as a polygonal shape having three or more faces.

As shown in FIG. 2, the ultraviolet lamp 12 is arranged in the body 11 in a state of being housed in the protective tube 13 having liquidtightness and ultraviolet transparency. Note that FIG. 2 shows an example in which four ultraviolet lamps 12 are arranged in the body 11 as a mere example, but the ultraviolet lamp 12 arranged in the body 11 is not limited to this. As an example, the ultraviolet lamp 12 has a linear arc tube, and the vertical (vertical) size of the reflective surface formed on the side surface 11c of the body 11 is at least in the longitudinal direction of the arc tube of the ultraviolet lamp 12. It corresponds to the length (emission length), and the ultraviolet rays emitted from the ultraviolet lamp 12 are reflected inward on the reflecting surface. If the size of the side surface 11c (that is, the reflective surface) of the body 11 in the vertical direction (vertical direction) is longer than the light emission length, there is a disadvantage that the pressure loss increases, and conversely, the size is larger than the light emission length. If it is shortened, there is a disadvantage that the irradiation performance is deteriorated. Therefore, making the size substantially equal to the emission length has an advantage that these disadvantages can be avoided.

Specifically, as shown in FIG. 1, the irradiation assembly 10 is attached to the frame 14. The frame 14 has an upper frame 14a and a lower frame 14b, and four side frames 14c extending between them, and the four side frames 14c specify the square body 11. Support by placement. The protective tube 13 containing the ultraviolet lamp 12 is supported by the upper frame 14a and the lower frame 14b at the upper and lower ends thereof. As described above, in order to efficiently reflect the ultraviolet rays emitted from the ultraviolet lamp 12 on the reflecting surface, the ultraviolet lamp 12 in the protective tube 13 and the side surface 11c of the body 11 appropriately correspond to each other. The arrangement between the two is determined so as to be. As a modification of the support structure of the protective tube 13, the protective tube 13 may be supported by the upper frame 14a or the lower frame 14b at least at the upper end or the lower end thereof. Further, the lower end of the protective tube 13 may be integrally sealed with the same material as the glass material (ultraviolet ray transmitting material) on the side surface like a test tube. As another example, the lower end of the protective tube 13 may be formed of a material different from the glass material (ultraviolet ray transmitting material) on the side surface, and in that case, the joint portion between the side surface and the lower end (bottom surface) may be formed by packing or the like. Keep it liquidtight. As the material of the frame 14, a metal material having rigidity and corrosion resistance such as stainless steel can be used. Further, for convenience of illustration, each part of the frame 14 such as the side frame 14c is drawn in the shape of a square bar or a plate, but the present invention is not limited to this, and may be made of an angle material.

In the body 11, a flange 11d protruding in the horizontal direction is provided around the opening of the upper surface 11a. The flange 11d can function as a mounting site for the rectifying body 20 as described later, and, if necessary, as a mounting site when installing the irradiation assembly 10 in the water channel, or for closing or rectifying. It can also function as a partition member. The side frame 14c extends upward from the upper surface 11a of the body 11, and the upper frame 14a is located at the upper end of the side frame 14c. A control box 15 is mounted on the upper frame 14a, and a device (not shown) for supplying electric power to the ultraviolet lamp 12 is housed in the control box 15. The upper end of the protective tube 13 leads to the inside of the control box 15, and the electric wiring of the ultraviolet lamp 12 passes through the inside of the protective tube 13 and is connected to the device for supplying the electric power in the control box 15. In this way, the control box 15 is arranged above the body 11. At least the portion of the control box 15 near the bottom surface is densely configured so that the liquid does not enter the box 15 even if it comes into contact with the liquid to be treated in the water channel.

The irradiation assembly 10 having the above configuration is arranged in a water channel through which the liquid to be treated flows. Specifically, the irradiation assembly 10 is arranged in the water channel in an upright state as shown in FIG. 1, and the liquid to be treated flowing through the water channel passes through the openings of the upper surface 11a and the lower surface 11b of the body 11 to form the body. It passes through the body 11 in the vertical direction (vertical direction). The liquid to be treated passing through the body 11 is irradiated with the ultraviolet rays emitted by the ultraviolet lamp 12 and the reflected light from the reflecting surface of the side surface 11c. As a result, purification treatment such as disinfection and sterilization of the liquid to be treated is performed by ultraviolet rays. In this way, the arrangement in which the length direction of the ultraviolet lamp 12 in the irradiation assembly 10 forms the vertical direction (vertical direction) in the water channel is such that the ultraviolet irradiation covers a wider range in the vertical direction (vertical direction) in the water channel. Therefore, it is possible to efficiently deal with fluctuations in the depth of the liquid to be treated in the water channel, which is advantageous. That is, for example, when the length direction of the ultraviolet lamp is arranged so as to form a horizontal direction (horizontal direction) in the water channel, in order to cope with the fluctuation of the depth of the liquid to be treated in the water channel, in the water channel, for example. In order to secure a wider range of ultraviolet irradiation in the vertical direction (vertical direction), it is necessary to arrange a large number of ultraviolet lamps in the vertical direction (vertical direction), which increases the cost. However, if the arrangement is such that the length direction of the ultraviolet lamp 12 in the irradiation assembly 10 is in the vertical direction (vertical direction) in the water channel as in the present embodiment, there is no such disadvantage. Further, by arranging the ultraviolet lamp 12 so as to form a vertical direction (vertical direction) in the water channel, the irradiation assembly 10 and the rectifying body 20 can be replaced without removing the irradiation assembly 10 and the rectifying body 20 from the water channel. Since the lamp can be designed so that the lamp can be replaced by moving the ultraviolet lamp 12 in and out from the upper end of the protective tube 13, the lamp replacement work becomes easy. Further, by arranging the ultraviolet lamp 12 so as to form a vertical direction (vertical direction) in the water channel, the risk of water leakage in the upper part of the protective tube 13 can be reduced. In particular, if the shape of the protective tube 13 is a test tube type in which the lower end thereof is integrally sealed with the side surface, the possibility of water leakage at the lower part of the protective tube 13 is almost zero, and water leakage is performed only at the upper part. There is a possibility, but since the water pressure at the top is low, the risk of water leakage is considerably low overall.

When the liquid to be treated flowing through the water channel is sewage, the frequency of dirt adhering to the reflective surface of the side surface 11c of the body 11 increases. It is desirable to properly (eg, frequently) clean the reflective surface of the side surface 11c in order to remove dirt adhering to the reflective surface. On the other hand, when the liquid to be treated flowing through the water channel is not sewage, that is, when the ultraviolet irradiation device 1 according to the present invention is applied to the water purification treatment, the frequency of dirt adhering to the reflective surface of the side surface 11c of the body 11 is not high. Therefore, the reflective surface of the side surface 11c may be cleaned as appropriate with a low frequency, or may be maintenance-free. Therefore, the ultraviolet irradiation device 1 according to the present invention is more suitable for application to a water channel for water purification treatment. However, it goes without saying that the ultraviolet irradiation device 1 according to the present invention can be applied to liquid treatment for any other purpose.

In order to efficiently pass the liquid to be treated in the vertical direction (vertical direction) in the irradiation assembly 10 arranged in the water channel, an appropriate water flow adjusting or rectifying means (for example, a weir, a partition, etc.) may be provided in the water channel. preferable. Depending on how such water flow adjustment or rectifying means are installed in the water channel, it is possible to set the flow of the liquid to be treated passing through the body 11 either upward or downward. Specifically, in order to set the flow of the liquid to be treated upward, a dam and / or a partition or the like is installed so that the liquid to be treated coming from the upstream of the water channel enters through the opening of the lower surface 11b of the body 11. On the contrary, in order to set the flow of the liquid to be treated downward, a dam and / or a partition or the like is installed so that the liquid to be treated coming from the upstream of the water channel enters through the opening of the upper surface 11a of the body 11. do it. Hereinafter, it is assumed that the flow of the liquid to be processed passing through the body 11 is set upward (that is, the opening of the upper surface 11a is the outlet and the opening of the lower surface 11b is the inlet). Since the flow of the liquid to be treated from the upstream to the downstream in the water channel can be generated by an appropriate height difference, it is possible to operate the ultraviolet irradiation device 1 according to the present invention without using a special pump. ..

Further, in order to efficiently pass the liquid to be treated in the vertical direction (vertical direction) in the irradiation assembly 10, the rectifying body 20 as shown in FIG. 3 may be combined with the irradiation assembly 10. The rectifying body 20 includes an open inlet portion 21 and a surrounding wall structure (23 and 24), and one of the upper surface 11a or the lower surface 11b of the tubular body 11 enters the rectifying body 20 and the other is the rectifying body 20. The irradiation assembly 10 is surrounded by the surrounding wall structure (23 and 24) of the rectifying body 20 while facing the outside of the rectifying body 20, and the fluid to be treated entered from the inlet portion 21 of the rectifying body 20 is the surrounding wall structure (23). And 24) are configured to enter one (entrance) of the upper surface 11a or the lower surface 11b in the body 11 of the irradiation assembly 10 and exit from the other (exit). As an example, the rectifying body 20 further includes an insertion port 22, and the body 11 of the irradiation assembly 10 is inserted into the rectifying body 20 through the insertion port 22, and the body 11 of the body is inserted. The rectifying body 20 is attached to the irradiation assembly 10 in a state where the rectifying body 20 enters one (inlet) of the upper surface 11a or the lower surface 11b of the above surface and the other (exit) faces the outside of the rectifying body 20 through the insertion port 22.

In the example of FIG. 3, the rectifying body 20 has a square shape having a size capable of loosely accommodating the body 11 and the lower frame 11b of the irradiation assembly 10, and an inlet portion 21 is formed on one side surface thereof. The three side surfaces thereof are wall surfaces 23, and an insertion port 22 is formed at the upper portion. Further, a saucer 24 is arranged on the bottom (lower surface) of the rectifying body 20. The saucer 24 may be configured to be removable if necessary, but is usually fixed to the bottom portion (lower surface) of the rectifying body 20 to close the bottom portion (lower surface). The surrounding wall structure of the rectifying body 20 is formed by the three wall surfaces 23 and the bottom (lower surface) saucer 24. A flange 25 protruding in the horizontal direction is provided on the upper portion of the rectifying body 20 around the insertion port 22. The inner width (inner diameter) of the flange 25 is smaller than the outer width (outer diameter) of the flange 11d of the body 11, and the outer width (outer diameter) of the flange 25 is the outer width of the flange 11d of the body 11. Larger than (outer diameter). The flange 25 of the rectifying body 20 also functions as a mounting site when installing an ultraviolet irradiation device 1 in which the irradiation assembly 10 and the rectifying body 20 are combined in a water channel, or as a partition member for closing or rectifying. Can be done.

FIG. 4 is a perspective view illustrating a state in which the irradiation assembly 10 of FIG. 1 and the rectifying fluid 20 of FIG. 3 are combined. As shown in this figure, according to one embodiment of the present invention, the ultraviolet irradiation device 1 can be provided as a unitized state in which the irradiation assembly 10 and the rectifying body 20 are combined. When assembling, the irradiation assembly 10 of FIG. 1 is inserted into the rectifying body 20 from the insertion port 22 of the rectifying body 20 with the lower frame 11b facing down, and the flange 11d of the irradiation assembly 10 is the rectifying body as shown in FIG. Insert until it is ready to be received by the flange 25 of 20. In this state, the flange 11d of the irradiation assembly 10 is fixed to the flange 25 of the rectifying body 20 by an appropriate fixing means such as a screw. In this way, the irradiation assembly 10 and the rectifying body 20 are assembled as an integral unit. In the assembled state, the opening on the inlet side of the body 11 (lower surface 11b in the illustrated example) enters the rectifying body 20, and the opening on the exit side (upper surface 11a in the illustrated example) inserts the insertion port 22. It is in a state of facing the outside of the rectifying body 20 through the structure, and the gap between the rectifying body 20 and the body 11 inside the rectifying body 20 is closed at the insertion port 22 of the rectifying body 20. There is. That is, the flange 11d provided on the upper surface 11a of the irradiation assembly 10 functions as a structure for closing the gap between the rectifying body 20 and the body 11. In this way, the liquid to be treated (untreated liquid) that has not passed through the inside of the body 11 does not leak from the gap in the insertion port 22 of the rectifying body 20. Due to such a closed structure, the liquid to be treated taken in from the inlet portion 21 provided on one side surface of the rectifying body 20 is the body-shaped body 11 from the opening of the lower surface 11b of the body-shaped body 11 (that is, the opening on the inlet side). It goes inside, passes through the inside of the body 11 upward, and is discharged from the opening of the upper surface 11a (that is, the opening on the exit side).

The saucer 24 provided at the bottom of the rectifying body 20 functions to receive the subsidence. In the unlikely event that the ultraviolet lamp 12 or the protective tube 13 in the irradiation assembly 10 is damaged, the damaged pieces can be received by the tray 24 to prevent the damaged pieces from being dissipated in the water channel. At the time of maintenance, the unit of the irradiation assembly 10 and the rectifying body 20 may be pulled up from the water channel to collect the subsidence such as the damaged debris in the saucer 24.

The gap distance between the outer periphery of the body 11 of the irradiation assembly 10 housed in the rectifying body 20 and the wall surface 23 of the rectifying body 11 and the depth of the saucer 24 (that is, the lower surface of the body 11). The distance) from 11b to the bottom (closed surface) of the saucer 24 is preferably determined appropriately in consideration of the condition that the head loss is small.

FIG. 5 is a partial cross-sectional side view showing a state in which the ultraviolet irradiation device 1 according to the present embodiment is installed in the water channel 30. The water channel 30 in which the ultraviolet irradiation device 1 is installed is partitioned from the treated water channel 40 that receives the treated liquid through the partition wall 41. An installation base 32 extending horizontally at a predetermined height in the water channel 30 is fixed to the partition wall 41. The installation base 32 is provided with an opening 32a that matches the lateral size of the wall surface 23 portion of the rectifying body 20. The size of the opening 32a is smaller than the outer width (outer diameter) of the flange 25, and the portion of the wall surface 23 of the rectifying body 20 can pass through the opening 32a, but the portion of the flange 25 is locked by the installation base 32. At the time of installation, a unit composed of a combination of the irradiation assembly 10 and the rectifying body 20 is inserted into the opening 32a of the installation base 32 with the saucer 24 facing down, and the flange 25 of the rectifying body 20 is attached to the installation base 32 as shown in FIG. Insert until it is ready to be accepted by. In this state, the unit can be stably placed on the installation base 32 by its own weight (ie, by its own weight enough to resist buoyancy). Of course, the flange 25 of the unit may be fixed or semi-fixed to the installation base 32 by using appropriate mounting members such as bolts and nuts, if necessary.

As an example, the installation base 32 has a substantially rectangular flat surface, and a weir 31 is formed vertically upward from one side 32b near the partition wall 41 of the installation base 32. As an example, the weir 31 may be a fixed weir with a given height h1. On the other side 32c of the installation base 32, the partition wall 33 is formed vertically upward. In the figure, only the partition wall 33 rising from one side 32c is drawn, but the same partition wall is formed on the remaining two sides. As a result, in a state where the unit composed of the combination of the irradiation assembly 10 and the rectifying body 20 is fixed to the installation base 32 as shown in FIG. 5, the outlet of the irradiation assembly 10 (the upper surface 11a of the body 11a, that is, the rectifying body 20). On the insertion port 22) side, a downstream space 34 liquid-tightly partitioned by the weir 31, the three-sided partition wall 33, and the bottom mounting base 32 is formed. The treated liquid discharged from the outlet of the irradiation assembly 10 flows out into the downstream space 34. The height of the partition wall 33 and the liquid level height of the upstream space (space other than the downstream space 34) of the water channel 30 are higher than the given height h1 of the weir 31 (fixed weir). Therefore, the treated liquid that has passed through the irradiation assembly 10 from the upstream space due to the height difference and has flowed into the downstream space 34 flows out from the downstream space 34 through the weir 31 to the treated water channel 40. Of course, the height of the partition wall (41, etc.) of the portion other than the weir 31 in the water channel 30 is higher than the height h1 of the weir 31, and is, for example, about the same height as the partition wall 33.

With such an installation structure, the liquid to be treated existing in the upstream space of the water channel 30 enters the unit from the inlet portion 21 of the rectifying body 20 due to the height difference of the liquid level between the upstream space and the downstream space 34. It enters, passes through the irradiation assembly 10 upward in the direction of arrow A, receives an ultraviolet irradiation treatment, and reaches the inside of the downstream space 34 from the upper exit. Then, the treated liquid in the downstream space 34 overflows from the weir 31 and enters the treated water channel 40.

The waterway 30 in which the ultraviolet irradiation device 1 is installed may be an open waterway type whose upper part is exposed (open) to the external environment, or all or at least a part of the upper part thereof is a lid or a ceiling. It may be an underdrain type closed by a wall. The open channel type water channel 30 may be a channel groove-shaped water channel, or may be a filtration pond or a reservoir having a water outlet. When the water channel 30 is a filtration pond or a reservoir, it is preferable to install the ultraviolet irradiation device 1 according to the present embodiment in the vicinity of the water outlet thereof. Similarly, the treated waterway 40 may be an open channel type or an underdrain type. Further, the culvert type treated culvert 40 may be a pressure culvert configured to provide a pump at an appropriate basin location and to send the treated water in the downstream direction.

The difference between the liquid level h0 of the liquid to be treated in the water channel 30 and the height h1 of the weir 31 provided in the downstream space 34 in the stage before entering the ultraviolet irradiation device 1 according to the present embodiment indicates the head loss. .. In designing the specific specifications of the ultraviolet irradiation device 1 according to the present embodiment, various conditions including the head loss may be appropriately set and designed. As an example, the liquid to be treated naturally flows down the water channel 30 without the assistance of a pump, the head loss is set to 200 mm or less, and four ultraviolet lamps 12 composed of low-pressure lamps having 1 kW performance are installed in the irradiation assembly 10. It was possible to design an ultraviolet irradiation device 1 capable of treating 40,000 m ³ of the liquid to be treated per day with the unit, and it was confirmed that appropriate treatment performance can be obtained with such specifications.

As an example, a given height h1 of the weir 31 is determined to be reasonably higher than the height h2 of the bottom surface of the control box 15. As a result, the lower part of the control box 15 can be constantly immersed in the liquid to be treated in the downstream space 34, and the lower part of the control box 15 is prevented from being exposed to air. When purifying water, the liquid to be treated is often chlorinated on the upstream side of the water channel 30. In such a case, the chlorine component is contained in the liquid to be treated that has reached the downstream space 34, and chlorine gas is released into the air from the surface of the liquid to be treated in the downstream space 34. As a general specification, the lower surface of the control box 15 is covered with stainless steel for rust prevention measures, and various parts related to the lower irradiation assembly 10 (parts for stopping the protective tube 13 and protective tubes 13). Cleaning plates, etc. that clean the surface of the surface) may be made of stainless steel. In that case, when the lower part of the control box 15 is not in contact with the liquid to be treated, the lower part of the control box 15 is exposed to chlorine gas emitted into the air from the surface of the liquid to be treated, and is made of stainless steel. However, these parts are rusted by chlorine gas. However, according to this embodiment, the fixed height (or minimum height) h1 of the weir 31 is set so that the lower part of the control box 15 can always be immersed in the liquid to be treated in the downstream space 34. This prevents the stainless steel parts from being exposed to the chlorine gas emitted into the air, thereby preventing the above-mentioned inconveniences.

FIG. 6 is a partial cross-sectional side view showing a modified example of FIG. In FIG. 6, the difference from FIG. 5 is that the weir 31 includes a height-adjustable moving weir 35, and other points may have the same configuration as in FIG. The height of the moving weir 35 can be adjusted stepwise or continuously to a height of the given height h1 or higher, and is provided over the entire area (horizontal width) of the weir 31. In the figure, the state where the moving weir 35 is set to the maximum height is shown by the dotted line 35', which is about the same as the height of the partition wall 33, for example. The minimum height of the moving weir 35 may be the same as or appropriately lower than the height h1 of the fixed weir 31. That is, the weir 31 is provided with the moving weir 35 so that the height can be adjusted in the range from the minimum height h1 to the maximum height (height of the dotted line 35'). By appropriately setting the height of the moving weir 35 higher than the height h1 of the weir 31, the overflow height of the treated liquid overflowing from the downstream space 34 into the treated water channel 40 is appropriately adjusted. be able to. As a result, the head loss can be adjusted as appropriate. Further, when the ultraviolet treatment function of the ultraviolet irradiation device 1 is stopped, such as when the ultraviolet irradiation device 1 according to the present embodiment is maintained, the moving dam 35 is set to the maximum height (height of the dotted line 35'). This makes it possible to prevent the liquid in the downstream space 34 (that is, the untreated liquid) from overflowing into the treated water channel 40. For example, when the unit consisting of the combination of the irradiation assembly 10 and the rectifying body 20 is pulled upward at the time of maintenance, the untreated liquid enters the downstream space 34 through the opening 32a of the installation base 32, but the moving weir 35 is used. By setting the height to the maximum (dotted line 35'), it is possible to prevent the untreated liquid from overflowing from the downstream space 34 to the treated water channel 40.

FIG. 7 is a partial cross-sectional side view showing a modified example of FIG. In FIG. 7, the difference from FIG. 6 is that an open / close adjustable drain portion (50, 51) for discharging the liquid in the downstream space 34 is provided, and the other points are the same as those in FIG. It may be there. As an example, the drain portion is composed of a drain port 50 and a drainage channel 51 connected to the drain port 50. For example, a drainage channel 51 is provided on the opposite side of the downstream space 34 with the partition wall 33 interposed therebetween, and an open / close adjustable discharge port 50 is provided at a position near the bottom surface of the downstream space 34 in the partition wall 33. The discharge port 50 is composed of, for example, a shutoff valve, is normally closed, and is opened when the liquid in the downstream space 34 needs to be discharged to the drainage channel 51. For example, when the ultraviolet irradiation device 1 according to the present embodiment is activated (at the start of operation), the discharge port 50 is opened and the liquid in the downstream space 34 is discharged to the drainage channel 51 through the discharge port 50. .. Before starting the ultraviolet irradiation device 1, the downstream space 34 is filled with untreated liquid. Therefore, by discharging such untreated liquid to the drainage channel 51 through the discharge port 50, the downstream space is filled. It is possible to prevent the untreated liquid accumulated in the 34 from flowing into the treated water channel 40 at the start of operation. For example, the ultraviolet irradiation treatment by the ultraviolet irradiation device 1 is started at the same time as the discharge port 50 is opened, and the liquid in the downstream space 34 is gradually not discharged as the untreated liquid is discharged to the drainage channel 51 through the discharge port 50. Make sure to switch from the treated liquid to the treated liquid. The discharge port 50 is closed after an appropriate time elapsed when the replacement with the treated liquid is considered to be substantially completed, and the ultraviolet irradiation treatment is continued thereafter. The drainage channel 51 may be any type of channel, such as an open channel, an underdrain channel, or a pipe channel. Further, the drainage destination of the drainage channel 51 may be returned (recovered) to the drainage channel 30 of the untreated liquid, or the drainage system outside the system of the ultraviolet irradiation device 1 according to the present embodiment ( For example, it may be discharged to public sewage. Of course, also in the example of FIG. 5, a drain portion (drain port 50 and drainage channel 51) as shown in FIG. 7 can be provided.

FIG. 8 is a perspective view illustrating a state in which a plurality of units 61 to 65 composed of a combination of an irradiation assembly and a rectifying body are juxtaposed as another embodiment of the ultraviolet irradiation device 1 according to the present invention. Each unit 61-65 is composed of a combination of the irradiation assembly 10 and the rectifying body 20 as shown in FIG. 4, arranged in the water channel 30 as shown in FIGS. 5-7, and arranged side by side along the weir 31. They are closely arranged. Similar to that described with reference to FIG. 5, on the downstream space 34 side of each unit 61 to 65 (irradiation assembly 10) arranged on the installation base 32, a partition wall is provided at a location (three surfaces) other than the weir 31. 33, 36, 37 are provided, and the downstream space 34 of each unit 61 to 65 (irradiation assembly 10) is individually divided by the partition walls 33, 36, 37. Specifically, as shown in FIGS. 5 to 7, a partition wall 33 arranged parallel to the weir 31, two partition walls 36 and 37 parallel to each other arranged at right angles to the weir 31 and the partition wall 33, and the weir 31. (Moving weir 35) separates the downstream space 34 corresponding to one unit 61 (irradiation assembly 10). The downstream space 34 corresponding to the other units 62 to 65 (irradiation assembly 10) is also similarly separated by a three-sided partition wall and a weir 31 (moving weir 35). As shown in the figure, the same partition wall (for example, 37) may be shared between adjacent units.

The moving weir 35 is provided so as to correspond to each unit 61 to 65 (irradiation assembly 10) so that the height can be adjusted individually for each of the individually partitioned downstream spaces 34. The height of each moving weir 35 corresponding to each unit 61 to 65 (irradiation assembly 10) is adjusted to a common height according to a predetermined head loss, for example, during operation (during ultraviolet treatment). At the time of maintenance, only the moving weir 35 corresponding to the specific units 61 to 65 (irradiation assembly 10) to be maintained may be adjusted to the maximum height (dotted line 35'). As another example, the units 61 to 65 (irradiation assembly 10) can be thinned out by suspending a specific unit during operation (during ultraviolet treatment), in which case the movement of the specific unit to be suspended can be performed. By setting the weir 35 to the highest height (dotted line 35'), overflow from the corresponding downstream space 34 to the treated channel 40 may be prevented.

Corresponding to each unit 61-65 (irradiation assembly 10), an open / close adjustable drain portion for discharging the liquid in the individually partitioned downstream space 34 is provided. Each drain portion includes a drain port 50 and a drain channel 51 provided for each of the individually partitioned downstream spaces 34, and the drain port 50 comprises, for example, a shutoff valve as described above. That is, for each of the units 61 to 65 (irradiation assembly 10), the discharge port 50 whose opening and closing can be adjusted is provided on the side of the partition wall 33 parallel to the weir 31, and each discharge port 50 has the common drainage channel 51. I am familiar with. When the individual discharge ports 50 are opened, the liquid discharged from the discharge ports 50 is discharged to the drainage channel 51. Similar to the above, the discharge port 50 corresponding to each unit 61 to 65 (irradiation assembly 10) is opened in the open state at the start of ultraviolet irradiation of the unit, and is accumulated in the downstream space 34 corresponding to the unit. The untreated liquid is discharged to the drainage channel 51, and then returned to the closed state. The opening / closing control of the discharge port 50 corresponding to each of the units 61 to 65 (irradiation assembly 10) can be performed simultaneously or individually as needed. Similar to the above, the drainage channel 51 may be any type of channel such as an open channel, an underdrain channel, or a pipe channel, and the drainage channel 51 may be discharged to an untreated liquid. It may be returned (recovered) to the water channel 30 or may be discharged to the outside of the system.

The units 61 to 65 arranged side by side as shown in FIG. 8 are not limited to the specifications including both the irradiation assembly 10 and the rectifying body 20 described above, and may include at least the irradiation assembly 10. ..

The reflective surface formed on the inner surface of the side surface 11c of the body 11 is not limited to a specific material, shape, structure, etc. In short, the inner surface of the side surface 11c of the body 11 reflects ultraviolet rays. It may be configured to have performance. Therefore, for example, even if the material of the side surface 11c of the body 11 itself has an ultraviolet reflection performance (for example, a metal having a light reflection performance such as aluminum or stainless steel, or a synthetic resin having a light reflection performance on the surface). For example, no special processing or the like is required to form the reflective surface, and the ultraviolet reflection performance of the material itself may be used as it is. On the other hand, when the material of the side surface 11c of the body 11c itself does not have the ultraviolet reflection performance, an appropriate reflective surface is formed by coating the inner surface of the side surface 11c with a fluororesin or polishing it. You can do it. Further, the ultraviolet reflectance of the reflecting surface formed on the inner surface of the side surface 11c of the body 11 is not replaced even if it is convenient or low, and in short, it provides at least appropriate reflecting performance. I hope I can.

Further, in order to positively function the inner surface of the side surface 11c of the body 11c as a reflective surface, it is preferable to consciously manage and maintain the inner surface (that is, the reflective surface) of the side surface 11c. For example, the inner surface of the side surface 11c of the body 11 may be cleaned regularly or intermittently to remove stains so that the function as a reflective surface is maintained. Further, it is preferable to constantly or at any time monitor the reflected light from the inner surface (that is, the reflecting surface) of the side surface 11c by a sensor, and based on the monitoring result, clean it at any time so that the function as the reflecting surface is maintained. .. More preferably, when an automatic cleaning mechanism is arranged near the lower surface of the control box 15 and the inner surface of the side surface 11c of the body 11 should be cleaned, the automatic cleaning mechanism is operated to automatically clean the reflective surface. It may be done in. Of course, not limited to this, cleaning of the reflective surface can also be performed manually during maintenance work. As is clear from the above, in the present invention, the reflective surface formed on the inner surface of the side surface 11c of the body 11 is a technique intended to reuse the ultraviolet rays reflected from the reflective surface for processing the liquid to be treated. It is based on the concept.

In one embodiment, the reflective surface formed on the inner surface of the side surface 11c of the body 11 of the irradiation assembly 10 may have a removable structure. FIG. 9 is a partially disassembled perspective view showing an example in which a reflective surface is formed by a removable reflector 11e, and for convenience, only one reflector 11e arranged on one inner surface of the side surface 11c of the body 11 is shown. Is shown in a disassembled manner, but similar reflectors 11e are also arranged on the other three surfaces inside the side surface 11c. Further, in FIG. 9, for convenience, the ultraviolet lamp 12, the protective tube 13, and the control box 15 are not shown. U-shaped grooves 14d (FIG. 10) or slits or other edges for holding the side edges of the reflector 11e at appropriate locations on the four side frames 14c that support the inner four corners of the body 11. Stopping members and the like are provided respectively. As an example, when the reflector 11e is attached to the inner surface of the side surface 11c of the body 11, the reflector 11e is slid from above in the direction of the arrow in the drawing and inserted into the body 11. With this insertion, the reflector 11e is in a state where it can be locked by the U-shaped groove 14d (FIG. 10), a slit, an edge stopper, or the like, and when it is inserted to a predetermined position, an appropriate lower stopper structure (not shown). The downward movement is stopped in the figure of the reflector 11e. In the state where the reflector 11e is stopped at a predetermined position in the body 11 in this way, the reflector 11e functions as a reflection surface on the inner surface of the side surface 11c of the body 11. In addition, FIG. 10 is a partially enlarged perspective view showing a configuration example of the U-shaped groove 14d or a slit or an edge stopper member installed in the side frame 14c in a partial cross section and partially enlarged. .. When the reflector 11e is stopped at a predetermined position in the body 11, an appropriate stopper member (not shown) or a fastener such as a screw (not shown) is used so that the reflector 11e does not rattle upward. (Not shown) may be applied. When the reflector 11e is removed from the body 11, the reflector 11e may be pulled out upward (after removing the stopper member or the fastener such as a screw, if necessary). The reflector 11e is not limited to the flat surface shape as shown in the figure, but may be a curved surface shape.

In the example of FIG. 9, the reflector 11e having a flat surface shape may have ultraviolet reflection performance on only one surface (front surface), but has reflection performance on both sides (front surface and back surface). May be good. When both sides of the reflector 11e have reflective performance, if the reflective performance of one of the previously used surfaces (surface) deteriorates, the surface used as the reflective surface is turned over and the body 11 It can be switched to the other side (back side) by reattaching to. This makes it possible to reduce the frequency of replacing the reflector 11e with another one.

FIG. 11 is a partially exploded perspective view showing another embodiment in which a reflective surface formed on the inner surface of the side surface 11c of the body 11 of the irradiation assembly 10 is detachably configured. In this embodiment, the body 11 has a square shape having four side surfaces 11c, and each one side surface 11c as a whole has mounting members such as bolts and nuts to the side frame 14c (not shown). ), Each can be attached and detached.

An enlarged exploded perspective view of a configuration example of one side surface 11c having a flat plate shape as a whole is shown in FIG. 12, from the inside, a frame edge-shaped packing 11c1, a reflector 11c2, and a flat plate-shaped packing 11c3. , The outer plate 11c4 has a multi-layered structure arranged in this order. As shown in the figure, the edge frame-shaped packing 11c1 is a packing formed along the peripheral edge of the side surface 11c, and the inside of the peripheral edge is an opening 70. The edge frame-shaped packing 11c1 ensures the liquidtightness of the peripheral edge portion of the inner surface of the side surface 11c. The reflector 11c2 is a plate having a reflecting surface having the ultraviolet reflecting performance as described above, and only one surface (surface or inner surface) facing the opening 70 of the edge frame-shaped packing 11c1 has the ultraviolet reflecting performance. However, the present invention is not limited to this, and both sides (front surface and back surface or inner side surface and outer surface) may have reflective performance. The flat plate-shaped packing 11c3 is a packing having a liquidtightness on the entire surface, whereby the liquidtightness of the entire back surface (or outer surface) of the reflector 11c2 is ensured. The outer plate 11c4 is made of a relatively rigid or hard plate, and functions to press the flat plate packing 11c3 from the outside. By stacking these parts 11c1 to 11c4 in layers and fixing them to each other via a fixing member (not shown) such as a screw screw, one integrated side surface 11c is assembled. One integrated side surface 11c assembled in this way, with the edge frame-shaped packing 11c1 on the innermost side (that is, the outer plate 11c4 on the outermost side), and the left and right side frames 14c of the body-like body 11. And attached to the upper and lower horizontal frames 14e (FIG. 11) via mounting members (not shown) such as bolts and nuts. In the state where the side surface 11c is attached to the body 11 in this way, the surface (reflection surface) of the reflector 11c2 is the internal space of the body 11 through the opening 70 of the innermost edge frame-shaped packing 11c1. The ultraviolet rays emitted from the ultraviolet lamp 12 are reflected inward by the reflecting surface of the reflector 11c2.

When removing the reflector 11c2, the mounting members such as bolts and nuts are released, the side surface 11c is removed from the side frame 14c and the lateral frame 14e (FIG. 11) of the body 11, and then the removed side surface is removed. The reflector 11c2 can be removed by releasing the fixing member such as the screw screw of 11c and disassembling the parts 11c1 to 11c4. If both sides of the reflector 11c2 have ultraviolet reflection performance, turn over the reflector 11c2 once removed in this way, and then stack the parts 11c1 to 11c4 again in layers to attach the fixing member such as the screw screw. One integrated side surface 11c may be assembled by fixing the side surfaces 11c to each other, and the side surface 11c may be reattached to the body 11. In this way, as described above, by inverting the front and back of the reflector 11c2 whose both sides are reflective surfaces, it is possible to reduce the frequency of replacing the reflector 11c2 with another one.

In the example of FIG. 12, the edge frame-shaped packing 11c1 and the flat plate-shaped packing 11c3 ensure the overall liquidtightness of the back surface (or outer surface) of the reflector 11c2. Therefore, since the back surface (or the outer surface) of the reflector 11c2 does not come into contact with (or is minimized) the liquid to be treated, the back surface (or the outer surface) of the reflector 11c2 may be contaminated by the liquid to be treated. Can be minimized. As a result, when the front and back surfaces of the reflector 11c2 are inverted and the side surface 11c is reattached to the body 11, the back surface (or outer surface) of the reflector 11c2, in other words, a new surface (or inner surface) is obtained. Cleaning work of the surface can be omitted (or simplified).

The edge frame-shaped packing 11c1 and the flat plate-shaped packing 11c3 may be made of a general packing material, and may be made of, for example, rubber or a synthetic resin having appropriate elasticity. The outer plate 11c4 may be made of an appropriate metal or synthetic resin. As an example, an aluminum plate can be used as the reflector 11c2, and in that case, it is preferable to take appropriate measures in order to prevent electric contact due to aluminum and a different metal. For example, in order to prevent the aluminum reflector 11c2 from coming into contact with the mounting metal bolt, the diameter of the bolt through hole provided in the reflector 11c2 may be increased. Alternatively, a non-metal material may be used as a mounting member such as a bolt and a nut and / or a fixing member such as a screw screw.

The flat plate packing 11c3 and the outer plate 11c4 also serve a function of protecting the back surface of the reflector 11c2. However, if the liquid-tight function and / or the protective function for the back surface of the reflector 11c2 is unnecessary, these flat plate-shaped packings 11c3 and / or the outer plate 11c4 may be omitted. As another example, the flat packing 11c3 may be composed of a Teflon (registered trademark) plate. Alternatively, the flat plate packing 11c3 may be omitted, and the inner surface of the outer plate 11c4 may be used as a Teflon (registered trademark) processed surface.

A metal material may be used for the left and right side frames 14c and the upper and lower horizontal frames 14e of the body 11 in order to secure rigidity. In that case, when this metal material is a non-aluminum metal and the reflector 11c2 is an aluminum metal, it is recommended to use a frame-shaped packing 11c1 made of an insulating material such as rubber in order to avoid contact between the two. good. However, if it is not necessary for some reason such as the frame 14 being made of aluminum, the edge frame-shaped packing 11c1 may be omitted. In short, in order to detachably configure the reflective surface inside the side surface 11c of the body 11 of the irradiation assembly 10, the side surface 11c is configured to include at least a removablely configured reflector 11c2. You just have to.

13 is a view showing another structural example of the side surface 11c of the body 11 of the irradiation assembly 10 in the embodiment of FIG. 11, where (a) is an enlarged view showing the reflective surface (11c6) of the side surface 11c facing upward. The perspective view, (b) is a view which shows the cross section seen by the arrow of line BB in (a) further enlarged. In the example of FIG. 13, one side surface 11c having a flat plate shape as a whole includes a frame structure 11c5 and a reflector 11c6 detachably housed in the frame structure 11c5. The frame structure 11c5 includes a box-shaped protective case 11c51 having an open surface and a shallow bottom, and a frame member 11c52 covering only the peripheral edge of the opening surface of the protective case 11c51. That is, the edge frame member 11c52 is composed of only a rectangular outer frame, and the inside thereof is an opening. As shown in FIG. 13B, the cushion material 11c7 is arranged on the entire bottom surface of the protective case 11c51, the reflector 11c6 is arranged on the cushion material 11c7, and the peripheral edge of the reflector 11c6 is pressed so as to hold the edge. The frame member 11c52 is arranged. Convex 11c61 is formed over the entire peripheral edge of the reflector 11c6, and the inner peripheral edge of the edge frame member 11c52 is smaller than the outer peripheral edge of the convex 11c61, whereby the reflection housed in the protective case 11c51. The ridge 11c61 on the peripheral edge of the plate 11c6 is pressed by the edge frame member 11c52. By fixing the edge frame member 11c52 to the protective case 11c51 with a fixing member (not shown) such as a screw in the state where each component is arranged in this way, one integrated side surface 11c is assembled. In a state where the edge frame member 11c52 is fastened to the protective case 11c51, the ridges 11c61 on the peripheral edge of the reflector 11c6 are locked by the edge frame member 11c52, and thus the reflector 11c6 is fixed to the protective case 11c51 and the edge frame member 11c52. One surface of the reflector 11c6 is exposed from the inner opening (opening surface of the protective case 11c51), and this functions as a reflective surface. As shown in FIG. 13A, a plurality of bolt through holes TH for mounting are provided along the peripheral edge portion of the frame structure 11c5 so as to penetrate the edge frame member 11c52 and the protective case 11c51. There is.

The left and right side frames 14c of the body 11 and the left and right side frames 14c of the body 11 with the reflector 11c6 exposed from the edge frame member 11c52 (opening surface of the protective case 11c51) facing inward with the one integrated side surface 11c assembled in this way. It is attached to the upper and lower horizontal frames 14e (FIG. 11) via mounting members (not shown) such as bolts and nuts. In the state where the side surface 11c is attached to the body 11 in this way, one surface (reflection surface) of the reflector 11c6 exposed from the inner opening of the edge frame member 11c52 (the opening surface of the protective case 11c51) is the body 11. The ultraviolet rays emitted from the ultraviolet lamp 12 are reflected inward by the reflecting surface of the reflector 11c6.

When removing the reflector 11c6, the mounting members such as bolts and nuts are released, the side surface 11c is removed from the side frame 14c and the lateral frame 14e (FIG. 11) of the body 11, and then the removed side surface is removed. The reflector 11c6 can be taken out from the protective case 11c51 by releasing the fixing member such as the screw of 11c and removing the edge frame member 11c52. When both sides of the reflector 11c6 have ultraviolet reflection performance, the reflector 11c6 once removed in this way is turned upside down, placed again in the protective case 11c51, and the edge frame member 11c52 is placed on it. Then, by fixing the edge frame member 11c52 to the protective case 11c51 via a fixing member such as a screw, one integrated side surface 11c can be reassembled, and the side surface 11c can be reattached to the body 11. good. In this way, as described above, by inverting the front and back of the reflector 11c6 whose both sides are reflective surfaces, it is possible to reduce the frequency of replacing the reflector 11c6 with another one.

As an example, the reflector 11c6 is made of aluminum, and the edge frame member 11c52 and the protective case 11c51 are also made of aluminum. Of course, not limited to this, any of the reflector 11c6, the edge frame member 11c52, and the protective case 11c51 may be made of any suitable material.

In the structure shown in FIG. 13, since the reflector 11c6 is sandwiched between the edge frame member 11c52 of the frame structure 11c5 and the protective case 11c51, the reflector 11c6 itself has a bolt through hole for mounting. There is no need to provide. Further, a fixing member such as a screw for fixing the edge frame member 11c52 to the protective case 11c51 can also be prevented from coming into contact with the reflector 11c6. Therefore, since the aluminum reflector 11c6 does not come into contact with the metal (non-aluminum metal such as stainless steel) of the mounting bolt and the fixing screw, the problem of electric contact due to aluminum and different metals is the aluminum reflector 11c6. There is a merit that it does not occur in. That is, there is no possibility that the reflective surface of the reflector 11c6 is deteriorated by electric contact.

That is, in the structure shown in FIG. 13, the edge frame member 11c52 and the protective case 11c51 (that is, the protective member) of the frame structure 11c5 do not overlap with the reflector 11c6 with the reflector 11c6 sandwiched therein. It has a PA (a region where the edge frame member 11c52 is in direct contact with the rising wall of the protective case 11c51 as shown in FIG. 13B), and is fixed like a screw and / or a bolt in this peripheral region PA. It is configured to be fixed to each other via a member. That is, in FIG. 13A, the portion where the plurality of bolt through holes TH are provided is the peripheral region PA. With such a structure, as described above, even if the fixing member is made of non-aluminum metal, there is an advantage that the aluminum reflector 11c6 is not deteriorated by electric contact.

In any of the structures of FIGS. 12 and 13, in the state where the side surface 11c is assembled, the surface (back surface) opposite to the reflection surface (front surface) of the reflector 11c2 or 11c6 is formed by the outer plate 11c4 or the protective case 11c51. Since it is protected, the back surface of the reflector 11c2 or 11c6 can be appropriately protected while the work of further assembling the side surface 11c to the body 11 is performed. Therefore, the assembling worker does not need to be aware of the protection of the back surface of the reflector 11c2 or 11c6, which facilitates the work. Further, when the body 11 or the irradiation assembly 10 assembled at the factory is transported to the installation site, or when the ultraviolet irradiation device 1 is assembled at the site, the side surface 11c facing the outside. Since the reflector 11c2 or 11c6 is protected by the outer plate 11c4 or the protective case 11c51, the operator does not need to be aware of the protection of the reflector 11c2 or 11c6, which facilitates the transportation work and / or the assembly work. ..

A summary of one of the features of the structure shown in the embodiment of FIG. 12 or 13 is as follows. One side surface 11c includes a reflector 11c2 or 11c6 and a protective member (ie, an outer plate 11c4 or a protective case 11c51) arranged to cover one surface of the reflector 11c2 or 11c6, and the reflector 11c2 or 11c6. The other surface is configured to function as a reflective surface. These features have the above-mentioned merits.

In addition, another feature of the structure shown in the embodiment of FIG. 12 or 13 can be summarized as follows. One side surface 11c comprises a reflector 11c2 or 11c6, a protective member (ie, an outer plate 11c4 or a protective case 11c51) arranged to cover one surface of the reflector 11c2 or 11c6, and the opposite side of the protective member. Includes a rim frame member (ie, rim frame packing 11c1 or rim frame member 11c52) disposed along the periphery of the reflector 11c2 or 11c6, and between the rim frame member and the protective member the reflector 11c2 or 11c6. The other surface of the reflector 11c2 or 11c6 exposed from the inner opening of the edge frame member is configured to function as a reflective surface.

1 Ultraviolet irradiation device 10 Irradiation assembly 11 Body 11a Top surface (opening)
11b Bottom surface (opening)
11c Side surface (reflective surface)
11c1 Edge frame-shaped packing 11c2 Reflector plate 11c3 Flat plate-shaped packing 11c4 Outer plate 11c5 Frame structure 11c51 Protective case 11c52 Edge frame member 11c6 Reflector plate 11c61 Convex 11c7 Cushion material 11d Flange 11e Reflector plate 12 UV lamp 13 Protective tube 14 Frame 14a Frame 14b Lower frame 14c Side frame 14d U-shaped groove (or slit)
14e Horizontal frame 15 Control box 20 Rectifier 21 Entrance 22 Insertion 23 Wall surface (side wall)
24 Recipient (bottom wall)
25 Flange 30 Waterway 31 Weir 32 Installation base 33, 36, 37 Partition wall 34 Downstream space 35 Moving weir 40 Treated waterway 41 Partition wall 50 Outlet 51 Drainage channel 61, 62, 63, 64, 65 units

Claims (19)

A body in which the upper surface and the lower surface are open and the side surface is closed, and the inner surface of the side surface is formed as a reflective surface.
An ultraviolet lamp placed inside the body in a state of being housed in a protective tube having liquidtightness and ultraviolet transparency, and an ultraviolet lamp.
Equipped with irradiation assembly including
The irradiation assembly is arranged in a water channel through which the liquid to be treated flows, and the ultraviolet lamp is applied to the liquid to be treated passing through the body with one of the openings on the upper surface and the lower surface of the body as an inlet and the other as an exit. An ultraviolet irradiation device characterized by irradiating ultraviolet rays emitted from the surface and reflected light from the reflecting surface. The body has a square shape, the side surface thereof is composed of a plurality of flat surfaces, and the reflective surface formed on the inner surface of each flat surface is composed of a flat reflective surface. UV irradiation device. The ultraviolet irradiation device according to claim 1 or 2, wherein the reflective surface is formed by a removable reflector. The ultraviolet irradiation device according to claim 3, wherein the reflector has a flat surface shape, and both sides thereof have reflective performance, and the surface used as the reflective surface can be switched. The side surface includes the reflector and a protective member arranged so as to cover one surface of the reflector, and the other surface of the reflector is configured to function as the reflector. 3 UV irradiation device. The side surface includes the reflector, the protective member, and a rim frame member arranged along the peripheral edge of the reflector on the opposite side of the protective member, between the rim frame member and the protective member. The ultraviolet irradiation device according to claim 5, wherein the reflector is sandwiched between the two, and the other surface of the reflector exposed from the inner opening of the edge frame member functions as the reflector. The edge frame member and the protective member have a peripheral region that does not overlap with the reflector in a state where the reflector is sandwiched, and in this peripheral region, each other via a fixing member such as a screw and / or a bolt. The ultraviolet irradiation device according to claim 6, which is configured to be fixed. Further equipped with a rectifying fluid surrounding the irradiation assembly
The rectifying body includes an open inlet and a surrounding wall, and the rectifying body is provided with one of the upper surface or the lower surface of the tubular body entering the rectifying body and the other facing the outside of the rectifying body. Surrounding the irradiation assembly with the surrounding wall,
The liquid to be treated, which has entered from the inlet portion of the rectifying body, is guided by the surrounding wall so as to enter one of the upper surface or the lower surface of the body of the irradiation assembly and exit from the other. Item 7. The ultraviolet irradiation device according to any one of Items 1 to 7. The rectifying body further includes an insertion slot, through which the tubular body of the irradiation assembly is inserted into the rectifying body, and one of the upper surface or the lower surface of the tubular body enters the rectifying body. The ultraviolet irradiation device according to claim 8, wherein the rectifying body is attached to the irradiation assembly while the other side faces the outside of the rectifying body through the insertion slot. The ultraviolet irradiation device according to any one of claims 1 to 9, wherein the saucer for receiving the subsidence is arranged at the bottom of the rectifying body or below the irradiation assembly. A control box arranged above the body and containing a device for supplying electric power to the ultraviolet lamp, and a control box.
In the downstream space from which the liquid to be treated, which has been treated by the irradiation assembly, flows out, a weir provided at a given height is further provided, and the given height of the weir is higher than the bottom surface of the control box. The ultraviolet irradiation device according to any one of claims 1 to 10, which is set. The ultraviolet irradiation device according to claim 11, wherein the weir includes a moving weir provided so as to be height-adjustable, and the moving weir is adjustable to a height equal to or higher than the given height. The ultraviolet irradiation device according to any one of claims 1 to 12, further comprising an open / close adjustable drain portion for discharging the liquid from the downstream space from which the liquid to be treated, which has been processed by the irradiation assembly, flows out. A plurality of the irradiation assemblies are arranged in the channel and
Corresponding to each irradiation assembly, a partition is provided to individually divide the downstream space from which the liquid to be treated, which has been processed by the irradiation assembly, flows out.
The ultraviolet irradiation device according to any one of claims 1 to 11, wherein a moving weir provided with adjustable height is provided in the downstream space corresponding to each irradiation assembly. The ultraviolet irradiation device according to claim 14, wherein the moving weir is individually height-adjustable in the downstream space corresponding to each irradiation assembly. The ultraviolet irradiation device according to claim 14 or 15, each of which is provided with an open / close adjustable drain portion for discharging a liquid from the downstream space in the downstream space corresponding to each irradiation assembly. The ultraviolet irradiation device according to claim 8 or 9, further comprising a plurality of units comprising a combination of the irradiation assembly and the rectifying body, and arranging the plurality of units in the water channel. The ultraviolet irradiation device according to claim 17, wherein a saucer for receiving a subsidence is arranged at the bottom of the rectifying body for each unit. The ultraviolet irradiation device according to any one of claims 1 to 18, wherein the water channel is a water channel for water purification treatment.

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