JP5886037B2 - UV treatment equipment - Google Patents

Description

  In the present invention, by irradiating ultraviolet rays in water, DNA (deoxyribonucleic acid) of microorganisms such as bacteria and viruses existing in water is damaged, and loss of proliferation ability and infectivity (hereinafter referred to as “inactivation”) is achieved. The present invention relates to an ultraviolet treatment apparatus that deforms or decomposes the molecular structure of a substance dissolved in water.

  As a water disinfection technique, inactivation of microorganisms such as bacteria, viruses and protozoa by ultraviolet irradiation is widespread.

  For example, treated water obtained at a sewage treatment facility for treating sewage and agricultural settlement drainage, etc. is irradiated with ultraviolet rays from an ultraviolet treatment device installed in an open channel before being discharged into public water areas. As a result, microorganisms such as bacteria remaining in the treated water are inactivated.

  Moreover, in water purification facilities, in order to inactivate pathogenic microorganisms that cannot be sterilized with chlorine, such as Cryptosporidium, the treated water before chlorine is mixed is irradiated with ultraviolet rays.

  In addition, unlike chlorine, UV light is tasteless and odorless, so it can be inactivated without damaging the flavor of natural water by irradiating natural water before bottling, ensuring safety while maintaining quality. can do.

  As described above, in the ultraviolet treatment apparatus used for inactivating microorganisms such as bacteria and viruses, it is necessary to make the irradiation of ultraviolet rays to the water to be treated uniform in order to reliably inactivate the microorganisms.

  For example, when an ultraviolet treatment device is installed in an open channel, the ultraviolet irradiation lamp is placed at a certain interval in the water channel so that the water to be treated passes through the vicinity within a certain distance from the ultraviolet irradiation lamp at any position in the channel. Install in. However, for example, in a sewage treatment facility, when the amount of treated water increases, the water surface of the open channel rises, and the distance between the ultraviolet irradiation lamp of the ultraviolet treatment device installed in the water channel and the water surface exceeds the set value, and the treated water There has been a problem that some of them pass without receiving sufficient ultraviolet irradiation.

  In Patent Document 1, by providing a water stop plate and a sealing plate in a part of the open channel with respect to fluctuations in the open channel level due to fluctuations in the amount of water, a pipe structure in which treated water always passes under the sealing plate, There has been disclosed an ultraviolet disinfection device for an open channel that allows water to be treated to pass from an ultraviolet light source within a certain distance over a certain time (see paragraph 0007 and FIG. 1).

  In addition, when the hardness component or the like present in the water to be treated is irradiated with ultraviolet rays, and adheres to or accumulates on the surface of the ultraviolet irradiation lamp, the adhered matter or deposits hinder ultraviolet irradiation to the water to be treated. Has occurred.

  Patent Document 2 discloses a method and apparatus that has an air injection port, stirs water to be treated with the injected air, and separates and removes the adhering matter adhering to the ultraviolet ray generating tube (paragraph 0010 and FIG. 1).

JP 2001-29948 A Japanese Patent Laid-Open No. 7-100461

The present inventor has recognized at least the following problems when conceiving the present invention.
(1) By providing a water stop plate and a sealing plate in a part of the open channel, the water to be treated always passes under the sealing plate, and the water to be treated is within a certain distance from the ultraviolet irradiation lamp for a certain time or more. In the ultraviolet disinfection device disclosed in Patent Document 1 that is allowed to pass through, it is necessary to remove the water stop plate or the sealing plate when performing component replacement or maintenance inspection of the device, and the water level of the water channel becomes temporarily high, near the water surface There was a problem that sufficient UV disinfection could not be performed on water to be treated.

(2) In the ultraviolet disinfection device disclosed in Patent Document 1 of (1) above, it is possible to replace parts and perform maintenance inspection without stopping disinfection by installing the ultraviolet disinfection device in two or more open channels. There was a problem that the equipment scale would be large.

(3) The method disclosed in Patent Document 2 that has an air injection port, stirs water to be treated by the jetted air, and separates and removes the adhering matter adhering to the ultraviolet irradiation lamp. Although it is a physical removal method by flow, there is a problem that a stronger physical or chemical removal method is required because the force is insufficient to remove the adhered and deposited hardness component. .

  The present invention has been made to solve the above-mentioned problems, and can efficiently inactivate ultraviolet rays to be treated in water to be treated flowing through an open channel and inactivate microorganisms such as bacteria and viruses and ultraviolet rays. An object of the present invention is to provide an ultraviolet ray processing apparatus capable of replacing parts and performing maintenance and inspection while maintaining irradiation in a state suitable for the inactivation.

  An ultraviolet treatment apparatus according to the present invention includes an ultraviolet irradiation lamp housed in a protective tube and a UV module including a frame for holding the ultraviolet irradiation lamp in a water channel, and irradiates the incoming water with ultraviolet rays. A switchboard for supplying electricity to the UV module, a controller for controlling power transmission from the switchboard to the ultraviolet irradiation lamp, a stabilizer for stabilizing current, a cleaning tool for cleaning the surface of the protective tube, and the cleaning tool. A drive device for driving and a water level adjuster for adjusting the water level in the water channel are provided.

  The ultraviolet treatment apparatus according to the present invention is characterized in that the ballast is disposed in a UV module.

  The ultraviolet ray processing apparatus according to the present invention is characterized in that the cleaning tool is provided with a chemical solution inlet.

  The ultraviolet ray processing apparatus according to the present invention is characterized in that the cleaning tools of adjacent UV modules are driven in opposite directions.

  According to the ultraviolet ray processing apparatus of the present invention, the switchboard for supplying electricity to the UV module, the controller for controlling power transmission from the switchboard to the ultraviolet irradiation lamp, the stabilizer for stabilizing the current, and the surface of the protective tube are cleaned. Since the cleaning tool, the driving device for driving the cleaning tool, and the water level adjuster for adjusting the water level in the water channel are provided, the water level in the water channel can be kept constant even when the water amount fluctuates. At the same time, the ultraviolet rays emitted from the UV irradiation lamps of the UV modules, which are transmitted from the switchboard appropriately controlled by the controller and supplied with electricity stabilized by the ballast, flow into the inflow water through the protective tube cleaned by the cleaning tool. Therefore, it is possible to maintain the intensity of the irradiated ultraviolet light above the level suitable for inactivation of microorganisms such as bacteria and viruses, and stable UV treatment at all times. There is an effect that can be carried out.

  According to the ultraviolet processing apparatus of the present invention, since the switchboard for supplying electricity to the UV module is provided, there is an effect that the UV module can be easily replaced or maintained and inspected without stopping the ultraviolet processing.

  According to the ultraviolet processing apparatus according to the present invention, since the ballast is arranged in the UV module, the length of the electric cable connecting the ultraviolet irradiation lamp and the ballast can be shortened, so the chance of picking up electrical noise is reduced. Therefore, the electricity stabilized by the ballast can be supplied to the ultraviolet irradiation lamp as it is, and there is an effect that the intensity of the ultraviolet light irradiated from the ultraviolet irradiation lamp can be stabilized. In addition, since the length of the electric cable connecting the ultraviolet irradiation lamp and the ballast is constant regardless of the installation place of the ultraviolet treatment apparatus, the same ultraviolet treatment is provided even if the installation places of the ultraviolet treatment apparatus are dispersed. There is an effect that can.

  According to the ultraviolet ray processing apparatus of the present invention, since the cleaning tool is provided with the chemical solution injection port, in addition to the physical cleaning of scraping off the adhering material adhering to the surface of the protective tube with the cleaning tool, There is an effect that can be cleaned.

  According to the ultraviolet treatment apparatus according to the present invention, the cleaning tool of the adjacent UV module is configured to be driven in the opposite direction. Therefore, the resistance of the water to be treated by the cleaning tool can be minimized, so By preventing the temporary rise and always maintaining the set water surface height, there is an effect that stable ultraviolet irradiation can be performed on the inflowing water.

It is a perspective view which fractures | ruptures and shows the whole structure of the ultraviolet-ray processing apparatus by Embodiment 1 of this invention. (A) is a front view which shows the whole structure of UV module shown in FIG. 1, (b) is a side view of (a). It is sectional drawing which expands and shows the whole structure of the cleaning tool shown in FIG.2 (b). (A) is a top view schematically showing a state in which cleaning tools of adjacent UV modules among a plurality of UV modules arranged in the water channel shown in FIG. 1 are driven in opposite directions. (B) is the sectional view on the AA 'line of (a), (c) is the sectional view on the BB' line of (a). (A) is a top view schematically showing a state in which all the cleaning tools of a plurality of UV modules are driven in parallel on the same cross section for comparison with the driving state of the cleaning tool shown in FIG. (B) is a sectional view taken along the line CC ′ of (a). (A) is a schematic diagram showing a state where, among a plurality of UV modules in the ultraviolet processing apparatus according to Embodiment 2 of the present invention, a cleaning tool of one UV module is driven to follow a cleaning tool of another UV module. (B) is a sectional view taken along the line DD ′ of (a), (c) is a sectional view taken along the line EE ′ of (a), and (d) is a sectional view taken along the line (a). It is FF 'sectional view taken on the line. It is a side view which shows the structure which provided the ballast in the ultraviolet-ray processing apparatus by Embodiment 3 of this invention in the external vicinity of UV module. (A) is a front view which shows schematic structure of the movable weir as a water level regulator in the ultraviolet-ray processing apparatus by Embodiment 4 of this invention, (b) is a side view of (a) which shows the state which the flap closed. (C) is a side view of (a) showing the open state of the flap. It is a flowchart which shows Example 1 which applied the ultraviolet-ray processing apparatus by this invention to the sewage treatment. It is a flowchart which shows Example 2 which applied the ultraviolet-ray processing apparatus by this invention to fishery village wastewater treatment. It is a flowchart which shows Example 3 which applied the ultraviolet-ray processing apparatus by this invention to agricultural settlement wastewater treatment. It is a flowchart which shows Example 4 which applied the ultraviolet-ray processing apparatus by this invention to the office waste water treatment. It is a flowchart which shows Example 5 which applied the ultraviolet-ray processing apparatus by this invention to the office waste water treatment by accelerated oxidation. (A) is a front view which shows the whole structure of the modification of the UV module shown in FIG. 2, (b) is a side view of (a).

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a part of the entire configuration of the ultraviolet ray processing apparatus according to Embodiment 1 of the present invention, and FIG. 2 (a) is a front view showing the entire configuration of the UV module shown in FIG. 2 (b) is a side view of FIG. 2 (a), FIG. 3 is an enlarged sectional view of the entire configuration of the cleaning tool shown in FIG. 2 (b), and FIG. a) is a top view schematically showing a state in which the cleaning tools of adjacent UV modules among the plurality of UV modules arranged in the water channel shown in FIG. 1 are driven in opposite directions, respectively. 4 (b) is a cross-sectional view taken along the line AA 'of FIG. 4 (a), FIG. 4 (c) is a cross-sectional view taken along the line BB' of FIG. 4 (a), and FIG. For comparison with the driving state of the cleaning tool shown in FIG. 4, a state in which all cleaning tools of a plurality of UV modules are driven in a state where they are arranged in parallel on the same cross section is schematically shown. FIG. 5B is a cross-sectional view taken along the line CC ′ of FIG. In the following description, water to be subjected to ultraviolet treatment is referred to as treated water or inflow water.

  The ultraviolet treatment apparatus 1 according to the first embodiment is installed in the water channel P and inactivates microorganisms such as bacteria and viruses existing in the water by irradiating the water in the water channel P with ultraviolet light. The water P flows through a series of purification treatments in various water treatment facilities before being discharged into the public water area or before being reused. As shown in FIG. 1, the ultraviolet treatment apparatus 1 includes a frame 2, a long ultraviolet irradiation lamp 3 supported by the frame 2, and a long protective tube 4 that accommodates the ultraviolet irradiation lamp 3 in a liquid-tight state. , A distribution board 6 for supplying electricity to the ultraviolet irradiation lamp 3 of the UV module 5, a controller 7 for controlling power transmission from the distribution board 6 to the ultraviolet irradiation lamp 3, and an ultraviolet irradiation from the distribution board 6 A ballast 8 that stabilizes the current to the lamp 3, a cleaning tool 9 that reciprocates on the protection tube 4 of the UV module 5 to clean the outer peripheral surface of the protection tube 4, and a driving machine 10 that drives the cleaning tool 9. And a water level adjuster 11 that adjusts the water level of the water channel P, and a water level meter 12 that measures the water level of the water channel P. In FIG. 1, the switchboard 6 is installed on the water channel P upstream of the UV module 5 so as to straddle the water channel P. The controller 7 turns on / off the power to all the UV modules 5 electrically connected to the switchboard 6. By adding a monitoring device to the controller 7, the maintenance and maintenance of the ultraviolet irradiation device 1 is performed. Inspection can be performed easily. The ballast 8 stabilizes the light output generated by the lamp output and the frequency fluctuation due to the voltage fluctuation supplied to the ultraviolet irradiation lamp 3. Although one water channel P is shown in FIG. 1, a plurality of water channels P may be provided side by side. In that case, at least one ultraviolet treatment device 1 is disposed in each water channel P. Further, the switchboard 6 may be disposed on the water channel P on the downstream side of the UV module 5 so as to straddle the water channel P. Moreover, the switchboard 6 does not need to straddle the water channel P.

  The UV module 5 is disposed in the water channel P so that the ultraviolet irradiation lamp 3 is along the flow direction of the water to be treated in the water channel P, that is, parallel to the flow. Thus, since the water to be treated is irradiated with ultraviolet rays while flowing along the ultraviolet irradiation lamp 3, the contact time between the ultraviolet rays irradiated from the ultraviolet irradiation lamp 3 and the water to be treated (relative to the water to be treated). UV irradiation time) can be sufficiently secured.

  As shown in FIGS. 1, 2A and 2B, the frame 2 of the UV module 5 is separated at a distance set based on the length of the ultraviolet irradiation lamp 3 and the protective tube 4. A pair of module legs 13 standing upright, a housing 14 mounted on the upper part of both module legs 13, a support frame 15 attached to the lower part of one module leg 13, the ultraviolet irradiation lamp 3 and Light leakage prevention that prevents leakage of ultraviolet rays to the outside of the water channel P located between the module legs 13 so as to be positioned above the protective tube 4 and parallel to the ultraviolet irradiation lamp 3 and the protective tube 4 The cover 16 is schematically configured.

  As shown in FIGS. 2A and 2B, the casing 14 is a long storage case having a rectangular tube shape, and the module communication board 17 and the ballast 8 are provided in the casing 14. Is arranged. Since a stable current is immediately supplied to the ultraviolet irradiation lamp 3 by the ballast 8 installed in the housing 14 of the frame 2, in order to inactivate microorganisms such as bacteria and viruses in the water to be treated in the water channel P. UV irradiation set to is always performed. Further, since the ballast 8 is disposed in the frame 2, a space for arranging the ballast 8 in the switchboard 6 becomes unnecessary, and the switchboard 6 is downsized. The current stabilized by the ballast 8 is preferably supplied to the ultraviolet irradiation lamp 3 before receiving a new electrical noise. Therefore, for example, as shown in FIG. 7, the ballast 8 may be provided on, for example, a power cable 18 that connects the UV module 5 and the switchboard 6 away from other electrical noise generation sources.

  In the first embodiment, the power cable 18 extending from each UV module dedicated socket (not shown) in the switchboard 6 is connected to the UV module 5 via the module communication board 17 and the ballast 8 in the housing 14. Are connected to each other, and each UV module 5 is supplied with power. Further, as shown in FIG. 2B, a long lifting handle 19 having a T-shaped cross section is attached on the upper surface of the housing 14. The lifting handle 19 is a handle used when lifting the UV module 5 during replacement, maintenance or inspection of the UV module 5. The support frame 15 supports one end of the protective tube 4 that accommodates the ultraviolet irradiation lamp 3. The light leakage prevention cover 16 prevents the ultraviolet rays from the ultraviolet irradiation lamp 3 from diffusing upward, and the height adjustment for both the module legs 13 is performed by the adjustment collar 20.

  In the first embodiment, as shown in FIG. 1, three UV modules 5 arranged in one water channel P are suspended from a UV module support rack 21 attached in the water channel P.

  As the ultraviolet irradiation lamp 3 supported by the frame 2 of the UV module 5, for example, a light source having an emission wavelength of 253.7 nm (nanometer) is preferably used, and a low-pressure mercury lamp is desirable as the type of the light source. Any medium pressure mercury lamp, LED lamp, or the like may be used as long as it can emit light having an emission wavelength of about 253.7 nm. The emission wavelength is not limited to 253.7 nm, and may be in the range of 250 nm to 260 nm, for example.

  In the first embodiment, two UV irradiation lamps 3 are installed in each UV module 5 apart from each other in the vertical direction. The distance d between the ultraviolet irradiation lamps 3 is a cylindrical region in which one ultraviolet irradiation lamp 3 extends in the length direction of the ultraviolet irradiation lamp 3 with a distance (d / 2) being at least half the distance d. It is set to be able to irradiate ultraviolet rays having sufficient intensity to inactivate microorganisms such as bacteria and viruses existing in the water to be treated. Of the two ultraviolet irradiation lamps 3, the upper ultraviolet irradiation lamp 3 has no ultraviolet irradiation lamp 3 adjacent to the upper ultraviolet irradiation lamp 3, so that the water level L <b> 1 of the water channel P is equal to the distance d described above from the upper ultraviolet irradiation lamp 3. It is adjusted by the water level adjuster 11 so that the position is half the distance (d / 2). By adjusting the water level, it is possible to irradiate the water to be treated flowing above the upper ultraviolet irradiation lamp 3 with ultraviolet rays having sufficient intensity to inactivate microorganisms such as bacteria and viruses. Further, of the two ultraviolet irradiation lamps 3, the lower ultraviolet irradiation lamp 3 has no ultraviolet irradiation lamp 3 adjacent to the lower side, so that the lower ultraviolet irradiation lamp 3 has a height from the bottom P 1 of the water channel P. Is provided at a position equal to the distance (d / 2).

  In the first embodiment, two UV irradiation lamps 3 are provided in one UV module 5, but three or more UV irradiation lamps 3 may be provided in one UV module 5, One ultraviolet irradiation lamp 3 may be provided. For example, FIG. 7 shows a configuration in which six UV irradiation lamps 3 are provided in one UV module 5. Thus, even when three or more ultraviolet irradiation lamps 3 are provided, the distance between the uppermost ultraviolet irradiation lamp 3 and the water level L1 of the water channel P, and the lowermost ultraviolet irradiation lamp 3 and the bottom P1 of the water channel P These distances are adjusted or set based on the relationship with the ultraviolet irradiation amount. FIGS. 14A and 14B show a configuration in which one UV irradiation lamp 3 is provided in one UV module 5. Even when a single ultraviolet irradiation lamp is provided in this manner, the distance between the ultraviolet irradiation lamp 3 and the water level L1 of the water channel P and the distance between the bottom P1 of the water channel P are adjusted based on the relationship with the amount of ultraviolet irradiation. Or set.

The irradiation time of ultraviolet rays to the water to be treated is calculated by dividing the length of the ultraviolet irradiation lamp 3 by the flow rate of the water to be treated. The length of the ultraviolet irradiation lamp 3 and the flow rate of the water to be treated are determined to some extent. In many cases, the irradiation time of the ultraviolet rays to the water to be treated is less than 1 second. The amount of ultraviolet irradiation is the product of the intensity of ultraviolet rays from the ultraviolet irradiation lamp 3 and the irradiation time of ultraviolet rays to the water to be treated (ultraviolet irradiation amount mJ / cm ² = mWs / cm ² = ultraviolet intensity mW / cm ² × irradiation time s. ). In this Embodiment 1, it is desirable to irradiate on the conditions which become 10 mJ / cm < ² > or more. Since the intensity of the ultraviolet rays from the ultraviolet irradiation lamp 3 is attenuated with time, the ultraviolet irradiation lamp 3 is used to confirm that the necessary amount of ultraviolet irradiation is secured for the water to be treated. There is provided an ultraviolet sensor (not shown) that constantly monitors the intensity of the ultraviolet rays. When the ultraviolet intensity is attenuated by an ultraviolet sensor (not shown) and approaches the predetermined value, for example, the ultraviolet irradiation lamp 3 can be replaced for each UV module 5. Further, even if the intensity of the ultraviolet rays from the ultraviolet irradiation lamp 3 is higher than a level sufficient to inactivate microorganisms such as bacteria and viruses, the adherence of hardness components on the surface of the protective tube 4 covering the ultraviolet irradiation lamp 3 Is attached, the amount of ultraviolet irradiation received by the water to be treated is substantially attenuated. For this reason, it is necessary to always clean the surface of the protective tube 4. This state can also be grasped using detection data of an ultraviolet sensor (not shown). The detection data of the ultraviolet sensor (not shown) is sent to the controller 7, and the controller 7 appropriately controls the switchboard 6 to drive the cleaning tool 9 and turn on / off the ultraviolet irradiation lamp 3. Etc. may be used.

  The protective tube 4 is a quartz glass sleeve having sufficient transparency to transmit the ultraviolet rays from the ultraviolet irradiation lamp 3, and protects the ultraviolet irradiation lamp 3 from the water to be treated and prevents the ultraviolet irradiation lamp 3 from being damaged. The space formed between the ultraviolet irradiation lamp 3 and the protective tube 4 is cooled by the inflow treated water through the protective tube 4 to prevent the ultraviolet irradiation lamp 3 from overheating. As shown in FIG. 2, one end of the protective tube 4 is supported by a support frame 15 by a support O-ring 22, and the other end is attached to a module leg 13 including the support frame 15. A sleeve cap 23 having a socket into which the ultraviolet irradiation lamp 3 is inserted is attached to the other module leg 13 that faces the module leg 13, and the attachment portion is fixed by a sleeve nut 24.

  As shown in FIG. 3, the cleaning tool 9 is attached so as to slide on the outer peripheral surface of the protective tube 4 along the length direction (arrow A1 and A2 directions) of the protective tube 4. The cleaning tool 9 includes a substantially cylindrical canister body 25 having an inner diameter larger than the outer diameter of the protective tube 4, a cleaning seal assembly 26 attached to the inside of both end portions of the canister body 25, and the canister body 25. And a chemical solution injection port 27 provided at the upper center of the center. The cleaning seal assembly 26 includes a substantially cylindrical seal 28 that can expand and contract in the radial direction, an annular spring 29 that urges the central portion of the seal 28 in a direction to reduce the diameter, and both ends of the seal 28 and the canister body 25. It is comprised from the spacer 30 arrange | positioned between the inner walls of a part. The seal 28 is an elastic member having an inner diameter smaller than the outer diameter of the protective tube 4 when the diameter is reduced. Such a cleaning seal assembly 26 is disposed inside both end portions of the canister body 25 in a state of being sandwiched between an inner washer 31 and an outer washer 32 having an inner diameter substantially equal to the outer diameter of the protective tube 4. And is fixed by a snap ring 33. Further, a chemical liquid injection tube 34 is connected to the chemical liquid injection port 27. Further, the cleaning tool 9 and a cleaning tool (not shown) attached to a protective tube (not shown) disposed below can be connected by a connecting member 35. When such a cleaning tool 9 is attached to the outer peripheral surface of the protective tube 4, the seal 28 of the cleaning seal assembly 26 is in close contact with the outer peripheral surface of the protective tube 4, and protects the inner side of the central portion of the cleaning tool 9. A gap 36 is formed between the outer peripheral surface of the tube 4. The gap 36 is for supplying the chemical solution uniformly on the outer peripheral surface of the protective tube 4. The chemical solution is preferably a gel-type phosphoric acid-based cleaning agent that can efficiently dissolve the hardness component that adheres and accumulates on the outer peripheral surface of the protective tube 4. Examples include, but are not limited to, the product name Acty Clean Gel manufactured by Jacqueline Industries, Inc. (Ontario, Canada). By injecting such a chemical into the gap 36 of the cleaning tool 9, the hardness component-based deposits (for example, inorganic substances such as iron, calcium and manganese) adhering to the outer peripheral surface of the protective tube 4 are dissolved, A synergistic effect that the dissolved matter can be removed from the outer peripheral surface of the protective tube 4 by the seal 28 of the cleaning tool 9 can be obtained.

  Although the cleaning tool 9 shown in FIG. 3 is provided with one chemical liquid inlet 27, two or more chemical liquid inlets 27 may be provided. In that case, the chemical liquid can be injected from one chemical liquid inlet 27 and the chemical liquid can be pushed out from the other chemical inlet 27. Further, by connecting the chemical injection port 27 with the chemical injection port 27 of the cleaning tool 9 provided in another ultraviolet irradiation lamp 3 of the same UV module 5, the chemical injection port 27 is arranged in the UV module 5 in one chemical injection operation. The chemical solution exchange of all the provided cleaning tools 9 can be performed.

  The drive machine 10 shown in FIG. 1 is a hydraulic pump that supplies power for moving the cleaning tool 9. The hydraulic hose 37 extends from the driving machine 10 to a hydraulic cylinder (not shown) in each UV module 5 via a hydraulic manifold 38 in the switchboard 6, and the hydraulic pressure from the driving machine 10 is hydraulic cylinder. The piston (not shown) in (not shown) is moved, and the cleaning tool 9 is moved along the length direction of the protective tube 4 (directions of arrows A1 and A2). As long as the cleaning tool 9 can be driven along the length direction of the protective tube 4 (the directions of the arrows A1 and A2), the driving machine 10 is not limited to a hydraulic type, and may be an electric type, for example. Moreover, the cleaning tool 9 and the drive machine 10 do not need to be joined by a member, and for example, the cleaning tool 9 may be driven using a magnetic force. In addition, a timer may be used for the activation timing of the cleaning tool 9.

  The water level adjuster 11 shown in FIG. 1 is a fixed weir installed in the water channel P on the downstream side of the UV module 5, and keeps the water level of the water to be treated passing near the ultraviolet irradiation lamp 3 constant. Since the water level adjuster 11 as a fixed weir is formed in a bellows shape, the length of the weir becomes longer, and even if the amount of water in the water channel P increases, the rise in the water level can be kept constant. However, it is possible to reliably irradiate the water to be treated without exceeding the irradiation range of the ultraviolet rays from the ultraviolet irradiation lamp 3 on the upper side of the UV module 5. On the contrary, even when there is no amount of water in the water channel P, it is possible to prevent the ultraviolet irradiation lamp 3 from discharging in the air by preventing the water level in the water channel P from decreasing. The water level meter 12 is effective in that when the water channel width of the water channel P is narrow and the water level increases, the water level changes abruptly, so that the change can be detected. In addition, although the water level adjuster 11 in this Embodiment 1 is a fixed weir, it is not limited to this, For example, a movable gate as shown in FIG. 8 can be mentioned.

Next, a method for driving the cleaning tool 9 will be described.
First, as shown in FIG. 5 (a), when all the cleaning tools 9 of the three UV modules 5 disposed in one water channel P are driven in a state where they are arranged in parallel in the same cross section, the adjacent cleaning tools Since the distance d1 between the 9 is narrow, the water flow resistance of all the cleaning tools 9 becomes very large, and as a result of pushing away a large amount of water to be treated, as shown in FIG. The water level of the treated water is raised from the normal water level L1 of the water channel P to the water level L2. In this case, the water to be treated above the cleaning tool 9 always rises and exceeds the ultraviolet irradiation range from the ultraviolet irradiation lamp 3 on the upper side of the UV module 5, so that a part of the water to be treated is not sufficiently irradiated with ultraviolet rays. Will flow through the water channel P.

  On the other hand, as shown in FIG. 4A, among the three UV modules 5 arranged in one water channel P, the cleaning tools 9 of the adjacent UV modules 5 are driven in opposite directions. . That is, by driving only the cleaning tool 9 of the central UV module 5 out of the three UV modules 5 in the opposite direction to the cleaning tool 9 of the UV modules 5 on both sides, the distance d2 between the adjacent cleaning tools 9 is sufficient. As a result of minimizing the water flow resistance of the cleaning tool 9, as shown in FIGS. 4 (b) and 4 (c), the water level of the water to be treated flowing above the cleaning tool 9 is obtained. Is maintained at the water level L1. Thereby, since the to-be-processed water above the cleaning tool 9 can pass through the ultraviolet irradiation range from the ultraviolet irradiation lamp 3 on the upper side of each UV module 5, it can receive sufficient ultraviolet irradiation.

  Moreover, the difference of the drive torque which arises in the case of the drive method of the cleaning tool 9 shown to Fig.5 (a) and FIG.5 (b) which drive the cleaning tool 9 to the upstream direction or downstream direction of the water channel P simultaneously is large. On the other hand, although the control of the driving machine 10 is complicated, the difference in driving torque due to the driving method of the cleaning tool 9 shown in FIGS. 4 (a) to 4 (c) can be minimized. In addition, if the cleaning tool 9 does not line up in the same cross section of the water channel P for a long time, even if the cleaning tool 9 of the adjacent UV module 5 does not drive in the opposite direction, for example, FIG. As shown in (d), it may be driven so as to follow at regular intervals. In addition, when a large number of UV modules 5 are installed in one water channel P and the influence on the water flow in the water channel P by driving the cleaning device 9 is small, for example, a plurality of cleaning tools in one UV module 5. 9 may be driven irregularly without being interlocked, or among the cleaning tools 9 of adjacent UV modules 5, the lowermost cleaning tool 9 near the bottom in the water channel P may be driven side by side. .

  As described above, according to the first embodiment, the frame 2, the long ultraviolet irradiation lamp 3 supported by the frame 2, and the long protective tube 4 that accommodates the ultraviolet irradiation lamp 3 in a liquid-tight state. , A distribution board 6 for supplying electricity to the ultraviolet irradiation lamp 3 of the UV module 5, a controller 7 for controlling power transmission from the distribution board 6 to the ultraviolet irradiation lamp 3, and an ultraviolet irradiation from the distribution board 6 A ballast 8 that stabilizes the current to the lamp 3, a cleaning tool 9 that cleans the surface of the protective tube 4 of the UV module 5, a drive unit 10 that drives the cleaning tool 9, and a water level that adjusts the water level of the water channel P Since the regulator 11 is configured to be provided, the water level in the water channel P can be kept constant even when the amount of water changes, and the power is transmitted from the switchboard 6 appropriately controlled by the controller 7, The ultraviolet rays emitted from the ultraviolet irradiation lamp 3 of the UV module 5 that has been supplied with electricity stabilized by the setting device 8 are applied to the inflowing water through the protective tube 4 cleaned by the cleaning tool 9, so that the irradiated ultraviolet rays are emitted. Can be maintained at a level suitable for inactivation of microorganisms such as bacteria and viruses, and stable UV treatment can be performed at all times.

  According to the first embodiment, since the switchboard 6 for supplying electricity to the UV module 5 is provided, there is an effect that the UV module 5 can be easily replaced, maintained, or inspected without stopping the ultraviolet treatment. . That is, since each UV module 5 is provided with the switchboard 6 so that power can be supplied to each UV module 5, for example, while the replacement of the UV module 5 that has stopped power supply or maintenance / inspection is being performed, There exists an effect which can continue the ultraviolet-ray process by the other UV module 5. FIG.

  According to the first embodiment, since the ballast 8 is disposed in the housing 14 of the UV module 5, the length of the electric cable 18 connecting the ultraviolet irradiation lamp 3 and the ballast 8 can be shortened. Since the chance of picking up electrical noise is reduced, the electricity stabilized by the ballast 8 can be supplied to the ultraviolet irradiation lamp 3 as it is, and the intensity of ultraviolet rays irradiated from the ultraviolet irradiation lamp 3 can be stabilized. is there. In addition, since the length of the electric cable 18 that connects the ultraviolet irradiation lamp 3 and the ballast 8 is constant regardless of the installation location of the ultraviolet treatment device 1, the same is true even if the installation locations of the ultraviolet treatment device 1 are dispersed. There exists an effect which can provide an ultraviolet-ray process.

  According to the first embodiment, since the cleaning tool 9 is provided with the chemical solution inlet 27, in addition to physical cleaning, the adhering material adhering to the outer peripheral surface of the protective tube 4 is scraped off by the seal 28 of the cleaning tool 9. , Chemical cleaning with chemicals is effective.

  According to this Embodiment 1, since it comprised so that the cleaning tool 9 of the adjacent UV module 5 might be driven in the opposite direction, the resistance with respect to the flow of the inflow water (to-be-processed water) by the cleaning tool 9 is suppressed to the minimum. Thus, there is an effect of preventing the temporary rise of the water surface of the water channel P and maintaining the set water surface height to stably irradiate the incoming water with ultraviolet rays.

Embodiment 2. FIG.
FIG. 6A shows a state in which the cleaning tool of one UV module is driven to follow the cleaning tool of another UV module among the plurality of UV modules in the ultraviolet processing apparatus according to the second embodiment of the present invention. FIG. 6B is a schematic top view, FIG. 6B is a cross-sectional view taken along the line DD ′ of FIG. 6A, and FIG. 6C is a cross-sectional view taken along the line EE ′ of FIG. FIG. 6D is a cross-sectional view taken along the line FF ′ of FIG. 6A, and the same components as those in FIGS.
In the ultraviolet ray processing apparatus according to the second embodiment, the cleaning tool 9 of one UV module 5 among the three UV modules 5 is not placed on the same cross section of the water channel P for a long time. The driving method for driving the cleaning tool 9 of the UV module 5 is different from the driving method of the cleaning tool 9 in the first embodiment in that a driving method for driving the cleaning tool 9 to follow the UV module 5 at a predetermined interval is adopted.

  As described above, according to the second embodiment, the cleaning tool 9 of one UV module 5 is driven to follow the cleaning tool 9 of another UV module 5 with a certain interval. In addition, the resistance against the flow of inflow water (treated water) by the cleaning tool 9 is minimized to prevent a temporary rise in the water surface of the water channel P, and the stability to the inflow water is maintained by always maintaining the set water surface height. There is an effect that can be irradiated with ultraviolet rays.

Embodiment 3 FIG.
FIG. 7 is a side view showing a configuration in which a ballast in the ultraviolet processing apparatus according to Embodiment 3 of the present invention is provided near the outside of the UV module, and the same components as those in FIGS. Therefore, duplicate explanation is omitted.
In the ultraviolet processing apparatus according to the third embodiment, the ballast 8 is provided on the power cable 18 connecting the UV module 5 and the switchboard 6, and six UV irradiation lamps 3 are provided in one UV module 5. This is different from the configuration according to the first embodiment.

  Since the power cable 18 connecting the UV module 5 and the switchboard 6 is away from other electrical noise generation sources, the chance that the ballast 6 picks up the electrical noise is reduced. Compared with Embodiment 1 or the like, by disposing the ultraviolet irradiation lamps 3 in the water to be treated in the water channel P at a high density, the water to be treated can be reliably irradiated with ultraviolet rays with a uniform and high irradiation amount. .

  As described above, according to the third embodiment, since the ballast 8 is provided on the power cable 18 away from other electrical noise generation sources, the opportunity for the ballast 8 to pick up the electric noise is reduced. Therefore, the electricity stabilized by the ballast 8 can be supplied to the ultraviolet irradiation lamp 3 as it is, and there is an effect that the intensity of ultraviolet rays irradiated from the ultraviolet irradiation lamp 3 can be stabilized.

  According to the third embodiment, since the ultraviolet irradiation lamps 3 are arranged at high density in the water to be treated in the water channel P, the ultraviolet rays having a uniform and high irradiation amount can be reliably irradiated on the water to be treated. There is an effect that can be done.

Embodiment 4 FIG.
FIG. 8 (a) is a front view showing a schematic configuration of a movable gate as a water level adjuster in the ultraviolet ray processing apparatus according to Embodiment 4 of the present invention, and FIG. 8 (b) shows a state in which the flap is closed. It is a side view of (a), FIG.8 (c) is a side view of Fig.8 (a) which shows the open state of a flap.
The ultraviolet ray processing apparatus according to the fourth embodiment is different from the structure according to the first embodiment in that a movable gate is used as the water level adjuster 11.

  The water level adjuster 11 in the fourth embodiment is an automatic water level adjusting gate, and includes a main weight arm 39, a main weight 40, a counterweight (not shown), a main rotating shaft 41, a flap 42, and a support column. 43 and a flap frame 44. In this type of water level adjuster 11, the flap 42 opens and closes according to the amount of water in the water channel P, and even if the amount of water increases, the flap 42 can be appropriately opened to allow the water to be treated to pass through. The water level can be kept appropriate. The water level adjuster 11 can be used other than the fixed weir and the gate type shown in FIG. 1 as long as the water level L1 in the water channel P can be constantly adjusted. For example, an electric valve may be used. Note that W in FIG. 8A is the channel width of the channel P.

  As described above, according to the fourth embodiment, since the gate-type movable weir is disposed in the water channel P as the water level adjuster 11, the flap 42 opens and closes according to the amount of water in the water channel P. Even if the amount of treated water increases, the water level in the water channel P can be maintained at an appropriate L1.

Example 1.
FIG. 9 is a flowchart showing Example 1 in which the ultraviolet treatment apparatus according to the present invention is applied to sewage treatment.
The ultraviolet treatment in Example 1 is performed for the purpose of inactivating chlorine-resistant pathogenic microorganisms that cannot be dealt with by chlorine disinfection provided in conventional sewage treatment facilities. In this sewage treatment, the sewage is subjected to ultraviolet treatment by the ultraviolet treatment device 49 on the filtered water that has passed through the first sedimentation basin 45, the reaction tank 46, the final sedimentation basin 47, and the filtration tank 48, and discharged into the public water area. The

  In Example 1, ultraviolet treatment can be performed efficiently and reliably by irradiating the filtered water with very little suspended matter (SS) that interferes with ultraviolet irradiation with ultraviolet irradiation.

Example 2
FIG. 10: is a flowchart which shows Example 2 which applied the ultraviolet-ray processing apparatus by this invention to fishery village wastewater treatment.
The ultraviolet treatment in this Example 2 is performed as an alternative technique for chlorine disinfection in the area where the treated water discharge destination of the treatment process provided with conventional chlorine disinfection is concerned about adverse effects on fishery-related water areas such as fishing grounds and aquaculture farms. . In this fishery village drainage treatment, the fishery village wastewater is subjected to ultraviolet treatment by the ultraviolet treatment device 49 on the filtered water that has passed through the screen 51, the flow rate adjustment tank 52, the reaction tank 46, the sedimentation basin 53, and the filtration tank 48. And then released into public waters.

  In Example 2, ultraviolet treatment can be efficiently and reliably performed by irradiating the filtered water with very little suspended matter (SS), which is an obstacle to ultraviolet irradiation, with ultraviolet irradiation. In addition, the environmental impact on the water area of the discharge destination by chlorine can be reduced, and there is an effect that the pathogenic bacteria and the like can be inactivated by UV irradiation and the environmental impact on the surrounding water area can be reduced.

  Further, the embodiment in which the ultraviolet-treated water represented by Example 2 is directly discharged into the water area does not use a highly persistent disinfectant such as chlorine, and is not limited to the fishery-related water area. It is also effective in areas where landscape protection (landscape) is required.

Example 3
FIG. 11: is a flowchart which shows Example 3 which applied the ultraviolet-ray processing apparatus by this invention to agricultural settlement wastewater treatment.
The ultraviolet treatment in Example 3 is performed for the purpose of disinfecting membrane filtration treated water in an agricultural settlement drainage treatment facility. In this agricultural settlement drainage treatment, the agricultural settlement drainage is subjected to ultraviolet treatment by the ultraviolet treatment device 49 on the filtered water that has passed through the screen 51, the flow rate adjustment tank 52, the nitrification tank 54, the denitrification tank 55, and the membrane filtration tank 56. After being released into public waters.

  In Example 3, ultraviolet treatment can be efficiently and reliably performed by irradiating the filtered water with very little suspended matter (SS) that interferes with ultraviolet irradiation with ultraviolet light. In addition, disinfection by ultraviolet irradiation does not contain chlorine with high persistence, so the environmental load on the discharge destination (agricultural settlement) is low, and there is an effect that the disinfection can be efficiently and reliably performed with high safety. Further, when the concentration of suspended solids in the water to be treated becomes high or when the ultraviolet ray treatment device 49 is maintained or inspected, the chlorine disinfection device 50 is temporarily switched.

Example 4
FIG. 12 is a flow chart showing Example 4 in which the ultraviolet ray processing apparatus according to the present invention is applied to wastewater treatment at a business establishment.
The ultraviolet treatment in Example 4 is performed for the purpose of inactivating and disinfecting chlorine-resistant pathogenic microorganisms in the reuse of waste water from business establishments (waterworks and landscape water). In this establishment wastewater treatment, the establishment wastewater is treated with the flocculant added to the treated water obtained through the screen 51, the flow rate adjustment tank 52, the reaction tank 46, and the settling tank 57, and the aggregated precipitation tank 58 and sand filtration. The filtered water that has passed through the tank 59 is subjected to ultraviolet treatment by the ultraviolet treatment device 49 and then reused.

  In Example 4, ultraviolet treatment can be efficiently and reliably performed by irradiating the sand filtered water with very little suspended matter (SS) or the like that interferes with ultraviolet irradiation. In addition, the inactivation of pathogenic bacteria and the like by ultraviolet irradiation is reliable, and there is an effect that high-quality disinfection can be performed without an unpleasant odor (chlorine odor) at the reuse destination.

Example 5 FIG.
FIG. 13: is a flowchart which shows Example 5 which applied the ultraviolet-ray processing apparatus by this invention to the office waste water treatment by accelerated oxidation.
The UV treatment in this Example 5 promotes removal of chromaticity that cannot be removed by a normal biological treatment method such as an activated sludge method in a wastewater treatment facility such as a marine product processing factory that uses colorants in the production process. This is done for the purpose of oxidation. In the establishment wastewater treatment by this accelerated oxidation, the establishment wastewater is obtained by adding a flocculant to treated water obtained through the screen 51, the flow rate adjustment tank 52, the reaction tank 46, and the precipitation tank 57, After the oxidizing agent is added to the filtered water that has passed through the sand filtration tank 59, the ultraviolet ray treatment is performed by the ultraviolet ray treatment device 49, and then discharged into the public water area.

  In this Example 5, an oxidant such as sodium hypochlorite, ozone and hydrogen peroxide is mixed with sand filtered water that has very little suspended matter (SS) that interferes with ultraviolet irradiation, and ultraviolet irradiation is performed. Hydroxyl radicals with strong oxidizing power are generated, which decomposes the chromaticity components in the sand filtration water.

1 UV treatment equipment, 2 frames, 3 UV irradiation lamps, 4 protective tubes,
5 UV module, 6 switchboard, 7 controller, 8 ballast, 9 cleaning tool,
10 drive, 11 water level adjuster, 12 water level gauge, 13 module legs,
14 housing, 15 support frame, 16 light leakage prevention cover, 17 module communication board,
18 Power cable, 19 Lifting handle, 20 Adjustment collar,
21 UV module support rack, 22 support O-ring, 23 sleeve cap, 24 sleeve nut, 25 canister body, 26 cleaning seal assembly,
27 Chemical inlet, 28 Seal, 29 Spring, 30 Spacer,
31 inner washer, 32 outer washer, 33 snap ring, 34 chemical injection pipe, 35 connecting member, 36 gap, 37 hydraulic hose, 38 hydraulic manifold,
39 main weight arm, 40 main weight, 41 main rotation axis, 42 flaps, 43 struts,
44 Flap frame, P water channel, P1 water channel bottom, L1, L2 water level,
W Channel width, d Distance between UV irradiation lamps, 45 First sedimentation basin, 46 Reaction tank,
47 Final sedimentation tank, 48 Filtration tank, 49 UV treatment device, 50 Chlorine disinfection device,
51 screen, 52 flow control tank, 53 sedimentation tank, 54 nitrification tank, 55 denitrification tank,
56 membrane filtration tank, 57 sedimentation tank, 58 coagulation sedimentation tank, 59 sand filtration tank

Claims (3)

An ultraviolet irradiation lamp housed in a protective tube and a UV module having a frame for holding the ultraviolet irradiation lamp is disposed in the water channel;
In the ultraviolet treatment device that irradiates the incoming water with ultraviolet rays,
A switchboard for supplying electricity to the UV module;
A controller for controlling power transmission from the switchboard to the ultraviolet irradiation lamp;
Ballast to stabilize the current ,
A cleaning tool for cleaning the surface of the protective tube;
A drive for driving the cleaning tool;
And a water level adjuster for adjusting the water level in the water channel ,
The cleaning tool for adjacent UV modules is:
An ultraviolet treatment device that is driven in opposite directions . The ultraviolet processing apparatus according to claim 1, wherein the ballast is disposed in a UV module. The cleaning tool is:
The ultraviolet treatment apparatus according to claim 1, further comprising a chemical liquid injection port.

Images