JP2021146334A - Liquid processor and dirt detecting method of ultraviolet reactor - Google Patents

Abstract

To provide a liquid processor capable of detecting dirt on a protective pipe of an ultraviolet lamp and dirt on a sensor window.SOLUTION: There is provided a liquid processor 10 for processing liquid by ultraviolet. The liquid processor 10 comprises: an ultraviolet reactor 12; an ultraviolet sensor 13; measurement water introducing means 14; and control means 15. The ultraviolet reactor 12 comprises: an ultraviolet lamp 21; and a processing tank 20 in which the ultraviolet lamp 21 is arranged. The ultraviolet sensor 13 measures illuminance of ultraviolet emitted from the ultraviolet lamp 21, the measurement water introducing means 14 is configured to introduce measurement water for illuminance measurement to the processing tank 20, and the control means 15 turns on the ultraviolet lamp 21 in a state of distributing the measurement water to the processing tank 20, so that illuminance is measured by the ultraviolet sensor 13 through the measurement water.SELECTED DRAWING: Figure 1

Description

The present invention relates to a liquid processing apparatus including an ultraviolet reactor.

When a ship such as a tanker unloads the cargo of crude oil and then sails toward the destination again, water called ballast water is usually stored in a ballast tank in order to balance the ship while sailing. Such vessels are provided with a ballast water treatment device (liquid treatment device) that purifies and treats the ballast water in order to prevent the destruction of the ecosystem due to the injection and drainage of ballast water.

For example, the ballast water treatment apparatus described in Patent Document 1 includes an ultraviolet reactor that irradiates ballast water with ultraviolet rays to kill microorganisms (sterilization treatment).

Japanese Unexamined Patent Publication No. 2006-248510

By the way, in such an ultraviolet reactor, if dirt adheres to the protective tube or the like of the ultraviolet lamp with use, the irradiation amount of ultraviolet rays may decrease and a desired killing effect may not be obtained. In this respect, it is possible to measure the irradiation amount of ultraviolet rays through the ballast water that circulates by the ultraviolet sensor installed in the ultraviolet reactor. However, since the quality of the ballast water that circulates during the purification process is unknown, it is difficult to determine whether the ballast water permeability is reduced or whether the protective tube or sensor window is dirty only by measuring with an ultraviolet sensor. be.

It should be noted that such a problem arises not only in the ballast water treatment device for treating seawater but also in the whole liquid treatment device for treating liquids such as rivers, lakes, ponds, and industrial water.

The present invention has been made in view of such circumstances, and provides a liquid processing apparatus capable of detecting dirt on a protective tube of an ultraviolet lamp or a sensor window.

According to the present invention, it is a liquid processing apparatus that treats a liquid with ultraviolet rays, and includes an ultraviolet reactor, an ultraviolet sensor, a water introduction means for measurement, and a control means. The ultraviolet reactor includes an ultraviolet lamp and the ultraviolet rays. A treatment tank in which a lamp is arranged is provided, the ultraviolet sensor measures the illuminance of ultraviolet rays emitted by the ultraviolet lamp, and the measurement water introduction means introduces measurement water for illuminance measurement into the treatment tank. The control means is provided by a liquid processing apparatus that lights the ultraviolet lamp in a state where the measuring water is circulated in the processing tank and measures the illuminance through the measuring water by the ultraviolet sensor. Will be done.

According to the present invention, since the ultraviolet lamp is turned on in a state where the treatment water for illuminance measurement is circulated and the illuminance is measured through the measurement water by the ultraviolet sensor, the influence of the permeability of the liquid to be purified. It is possible to detect dirt on the protective tube and sensor window without receiving UV rays.

Hereinafter, various embodiments of the present invention will be illustrated. The embodiments shown below can be combined with each other.

Preferably, the measuring water introduction means includes a measuring water storage tank and a measuring water introduction line, and the measuring water introduction line is connected to an upstream side line on the upstream side of the lines connected to the treatment tank. The measuring water introduction means is configured to introduce the measuring water stored in the measuring water storage tank into the treatment tank via the upstream line.

Preferably, it is provided with a circulation path for circulating the liquid flowing through the ultraviolet reactor to the outside.

Preferably, the control means includes a cooling step of turning off the ultraviolet lamp and allowing the processed liquid to flow through the circulation path, and a measuring step of turning on the ultraviolet lamp and allowing the measurement water to flow through the circulation path. Control to do.

Preferably, the measurement water is fresh water.

Preferably, the liquid processing apparatus includes the protection tube of the ultraviolet lamp and has at least one of the following configurations (1) to (3).
(1) A wiper for cleaning the protective tube is provided, and when the measured illuminance is equal to or less than a predetermined value, the control means controls the protective tube to be cleaned by the wiper, assuming that dirt is detected.
(2) A chemical introduction means for introducing a chemical into the ultraviolet reactor is provided, and when the measured illuminance is equal to or less than a predetermined value, the control means detects stains in the ultraviolet reactor by the chemical introduction means. A chemical is introduced into the protective tube, and the protective tube is controlled to be cleaned by the chemical.
(3) A wiper for cleaning the protective tube and a chemical introduction means for introducing chemicals into the ultraviolet reactor are provided, and the control means detects dirt when the measured illuminance is equal to or less than a predetermined value. First, the chemical introduction means controls to introduce the chemical into the ultraviolet reactor and cleans the protective tube with the chemical, and then the wiper controls to clean the protective tube.

Further, according to the present invention, an ultraviolet reactor in which measurement water for measuring illuminance is circulated in a treatment tank in which an ultraviolet lamp is arranged, the ultraviolet lamp is turned on, and the illuminance is measured through the measuring water by an ultraviolet sensor. Stain detection method is provided.

It is a conceptual diagram which shows the ballast water treatment apparatus 10 which concerns on 1st Embodiment of this invention, and the appearance which this was introduced into the ballast apparatus 1 of a ship. FIG. 2A is a side view schematically showing the ultraviolet reactor 12 of the ballast water treatment apparatus 10, and FIG. 2B is a front view schematically showing the ultraviolet reactor 12. It is a flowchart which shows the operation process of the ballast water treatment apparatus 10. It is a figure which shows the flow path at the time of the ballast operation of the ballast apparatus 1 of FIG. It is a figure which shows the flow path at the time of the deballast operation of the ballast apparatus 1 of FIG. It is a figure which shows the state which the ballast water is circulated in the ultraviolet reactor 12. It is a flowchart which shows the flow of the measurement process S3 of FIG. It is a figure which shows the state of flowing the measurement water through the ultraviolet reactor 12 of the ballast water treatment apparatus 10 of FIG. It is a flowchart which shows the operation process of the ballast water treatment apparatus 10 which concerns on 2nd Embodiment of this invention. It is a conceptual diagram which shows the ballast water treatment apparatus 10 which concerns on 3rd Embodiment and 4th Embodiment of this invention, and the appearance which this is introduced into the ballast apparatus 1 of a ship. It is a conceptual diagram which shows the ballast water treatment apparatus 10 which concerns on modification 1 of the 3rd Embodiment of this invention, and the state which introduced this into the ballast apparatus 1 of a ship. It is a conceptual diagram which shows the ballast water treatment apparatus 10 which concerns on modification 2 of the 3rd Embodiment of this invention, and the state which introduced this into the ballast apparatus 1 of a ship. It is a flowchart which shows the flow of the protection tube cleaning step S4 of the ballast water treatment apparatus 10 which concerns on 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described. The various features shown in the embodiments shown below can be combined with each other. In addition, the invention is independently established for each feature.

1 First Embodiment 1.1 Configuration of Ballast Device 1 FIG. 1 is an outline showing how the ballast water treatment device 10 as the liquid treatment device according to the first embodiment of the present invention is introduced into the ballast device 1 of a ship. It is a figure. The ballast device 1 of the present application includes a ballast tank 2 and a ballast pump 3, and the ballast pump 3 injects and drains ballast water into and out of the ballast tank 2. The operation of taking in outboard water such as seawater from the sea chest SC1 into the ship and injecting water into a plurality of ballast tanks 2 is a ballast operation, and the ballast water stored in the ballast tank 2 is drained from the outboard discharge port SC2. The operation is called deballast operation. Further, regarding the "ballast water" in the present specification, all the water taken into the ship is "ballast water" regardless of whether it is introduced (inflowed) into the ballast tank 2 or discharged (outflowed) from the ballast tank 2. It is expressed as. In addition, the ballast water taken into the ship shall include seawater, freshwater, brackish water, and the like.

As shown in FIG. 1, the ballast device 1 includes lines La to line Le for connecting each component to circulate ballast water, and on-off valves Va to on-off valves Vf provided on these lines. Here, the "line" is a general term for a line capable of flowing a fluid such as a flow path, a path, or a pipeline.

Specifically explaining the connection relationship of each line, the line La is a line connecting the sea chest SC1 and the ballast pump 3, and has an on-off valve Va. The line Lb and the line Lc are lines connecting the ballast pump 3 and the ballast tank 2. Since the ballast water treatment device 10 is arranged between the ballast pump 3 and the ballast tank 2, the line Lb is on the upstream side of the ballast water treatment device 10 and the line Lc is on the downstream side of the ballast water treatment device 10. The line Lb has an on-off valve Vb, and the line Lc has an on-off valve Vc and an on-off valve Vd. The line La to line Lc are collectively referred to as a ballast line.

One end of the line Ld is connected to the line La at a position between the on-off valve Va and the ballast pump 3, and the other end is connected to the line Lc on the ballast tank 2 side of the on-off valve Vc. An on-off valve Ve is installed on the line Ld. The line Ld is a line used during the debalast operation described later, and is also referred to as a debalast line. One end of the line Le is connected to the line Lc at a position between the ballast water treatment device 10 and the on-off valve Vc, and the other end is connected to the outboard discharge port SC2. An on-off valve Vf is installed on the line Le.

The configuration of the ballast device 1 described above is merely an example of a ballast device to which the ballast water treatment device 10 according to the present invention is introduced, and the ballast water treatment device 10 described below is an arbitrary ballast water treatment device 10. It can be applied to the ballast device of the configuration.

1.2 Configuration of Ballast Water Treatment Device 10 Next, the configuration of the ballast water treatment device 10 will be described. The ballast water treatment device 10 is introduced to treat the ballast water taken into the ship and the ballast water discharged from the ship to reduce the content of microorganisms and foreign substances contained in the ballast water. As shown in FIG. 1, the ballast water treatment device 10 of the present embodiment is provided between the ballast pump 3 and the ballast tank 2 (or the outboard discharge port SC2). Here, regarding the flow path of the ballast water treatment device 10, the connection portion on the ballast pump 3 side connected to the line Lb is connected to the upstream connection portion P1, and the connection portion on the ballast tank 2 side connected to the line Lc is connected to the downstream side. Let's call it part P2.

As shown in FIG. 2, the ballast water treatment device 10 of the present embodiment includes a filtration device 11 for filtering ballast water with a filter and an ultraviolet reactor for sterilizing microorganisms by irradiating the ballast water with ultraviolet rays as purification means. 12 and. Further, the ballast water treatment apparatus 10 includes an ultraviolet sensor 13 for measuring the illuminance of ultraviolet rays through the ballast water, a measuring water introducing means 14 for introducing the measuring water for measuring the illuminance, and the distribution of the ballast water circulating in the apparatus. A control means 15 for controlling the above is provided. Any known configuration can be applied to the filtration device 11, and the filtration device 11 can be omitted.

In addition, the ballast water treatment device 10 includes a first line L1 to a fifth line L5 for connecting each component and circulating ballast water, and an on-off valve V1 to V4 and an opening degree adjusting valve FCV installed in the first line L1 to the fifth line L5. To be equipped.

The first line L1 is a line (bypass line) that bypasses the purification means (filtration device 11 and the ultraviolet reactor 12) and connects the upstream side connecting portion P1 and the downstream side connecting portion P2, and has an on-off valve V1. The second line L2 is a line connecting the first line L1 and the filtration device 11, and has an on-off valve V2. The third line L3 is a line connecting the filtration device 11 and the ultraviolet reactor 12, and has an on-off valve V3. Further, one end of the fourth line L4 is connected to a position downstream of the connection position of the first line L1 with the second line L2 and is connected to a position upstream of the on-off valve V1, and the other end is the third line L4. It is connected to a position on the downstream side of the on-off valve V3 of the line L3. The fourth line L4 has an on-off valve V4. One end of the fifth line L5 is connected to the ultraviolet reactor 12, and the other end is connected to a position downstream of the on-off valve V1 of the first line L1. The fifth line L5 is provided with an opening degree adjusting valve FCV capable of adjusting the opening degree. A flow meter (not shown) is installed on the fifth line L5. The flow rate of the ballast water flowing through the ballast water treatment device 10 can be adjusted by the opening degree adjusting valve FCV and the flow meter. The third line L3 is an upstream line of the two lines (third line L3 and fifth line L5) connected to the treatment tank 20 (described later) of the ultraviolet reactor 12, and is also referred to as an upstream line. ..

As shown in FIGS. 2A and 2B, the ultraviolet reactor 12 includes a cylindrical processing tank 20 and a plurality of ultraviolet lamps 21 arranged in the processing tank 20. As shown in FIG. 2A, the ultraviolet lamp 21 is covered with a transparent quartz protective tube 22 as a protective tube. The ultraviolet reactor 12 sterilizes the microorganisms by irradiating the ballast water circulating in the treatment tank 20 with ultraviolet rays by the ultraviolet lamp 21. Further, the ultraviolet reactor 12 of the present embodiment includes a wiper 24. As shown in FIGS. 2A and 2B, the wiper 24 has a disk shape in which a through hole through which the ultraviolet lamp 21 (quartz protective tube 22) is passed is formed, and the scraper 24a is formed at a position along the quartz protective tube 22. Has been done. As shown in FIG. 2B, the wiper 24 is configured to clean the quartz protective tube 22 by moving along a slide shaft 24b arranged parallel to the ultraviolet lamp 21. In addition to the wiper 24 for cleaning the quartz protective tube 22, it is also preferable to provide a wiper (not shown) for cleaning the sensor window of the ultraviolet sensor 13.

The ultraviolet sensor 13 is installed in the ultraviolet reactor 12 and measures the illuminance of ultraviolet rays from the ultraviolet lamp 21 via ballast water. If the ultraviolet reactor 12 itself has an ultraviolet sensor, the sensor may be used.

As shown in FIG. 1, the measuring water introducing means 14 is connected to the third line L3 at a position downstream of the connection position with the fourth line L4. The measuring water introduction means 14 includes a measuring water storage tank 40, a measuring water introduction line 41, and an on-off valve 42. In the present embodiment, fresh water is stored in the measurement water storage tank 40, and the measurement water introduction means 14 can introduce the fresh water into the third line L3 as the measurement water by opening the on-off valve 42. ing. As the water storage tank 40 for measurement, a tank installed on a ship for use as domestic water or drinking water may be used. It is also preferable that the measuring water introducing means 14 includes a pump (not shown) for pumping the measuring water.

As shown in FIG. 1, the control means 15 controls the opening and closing of the on-off valves Va to Vf, the on-off valves V1 to V4, and the opening degree adjusting valve FCV described above, thereby circulating the ballast water in the ballast water treatment device 10. Control the distribution of. Further, the control means 15 controls the lighting and extinguishing of the ultraviolet lamp 21 of the ultraviolet reactor 12 and the cleaning of the quartz protective tube 22 by the wiper 24. Further, the control means 15 of the present embodiment also controls the introduction of fresh water into the third line L3 by controlling the opening and closing of the on-off valve 42 of the measuring water introducing means 14.

1.3 Operation of the ballast water treatment device 10 Next, the operation of the ballast water treatment device 10 will be described. Specifically, the operation steps shown in FIG. 3, that is, the purification step S1 during the ballast operation and the deballast operation of the ballast device 1, the cooling step S2 after the completion of the purification step, and the measurement step S3 performed thereafter will be described in order. do. The operation of the ballast water treatment device 10 shown below is controlled by the control means 15. However, it is also possible for the seafarers to manually perform some or all of the operations.

<Purification process S1>
FIG. 4 is a diagram showing a flow path of ballast water during ballast operation by the ballast device 1. Lines La to Lc indicated by thick lines are flow paths through which ballast water flows. During this operation, the on-off valves Va to Vd of the ballast device 1 are opened, and the other on-off valves Ve and Vf are closed. At this time, in the ballast water treatment device 10, the control means 15 controls to open the on-off valves V2 and V3 and the opening / closing valve FCV and close the on-off valves V1 and V4. As a result, the ballast water flows through a part of the first line L1, the second line L2, the third line L3, and the fifth line L5, and flows through the filtration device 11 and the ultraviolet reactor 12. At this time, the control means 15 also outputs a start command for the filtration device 11 and the ultraviolet reactor 12. As a result, the ballast water is purified by flowing through the filtration device 11 and the ultraviolet reactor 12, and is stored in the ballast tank 2.

On the other hand, FIG. 5 is a diagram showing a flow path during the deballast operation of the ballast device 1. A part of the line La, a part of the line Lb, a part of the line Lc, a line Ld, and a line Le shown by a thick line are flow paths through which ballast water flows during the deballast operation, and the on-off valves Vb, Vd to Vf are opened during this operation. Then, the other on-off valves Va and Vc are closed. At this time, in the ballast water treatment device 10, the control means 15 controls to open the on-off valve V4 and the opening-opening adjusting valve FCV and close the on-off valves V1 to V3. As a result, the ballast water circulates through a part of the first line L1, a part of the fourth line L4, a part of the third line L3, and the fifth line L5, bypasses the filtration device 11, and circulates only the ultraviolet reactor 12. The control means 15 also outputs a start command for the ultraviolet reactor 12. The ballast water stored in the ballast tank 2 circulates in the ultraviolet reactor 12, so that microorganisms and foreign substances propagated during the storage are purified. The ballast water discharged to the outside of the ship is not filtered by the filtration device 11 because the ballast water in the ballast tank 2 is once filtered during the ballast operation.

In the purification step S1 described above, the control means 15 receives the illuminance of the ultraviolet rays in the processing tank 20 measured by the ultraviolet sensor 13, and when the illuminance of the ultraviolet rays decreases, the wiper 24 is operated. The quartz protective tube 22 is designed to be cleaned.

<Cooling step S2>
After the completion of the purification step S1 during the ballast operation or the deballast operation, as shown in FIG. 6, the control means 15 opens the on-off valves Vb, Vc, Ve of the ballast device 1 and the on-off valve V4 of the ballast water treatment device 10. The degree adjustment valve FCV is opened and the other on-off valves Va, Vd, Vf and on-off valves V1 to V3 are closed. As a result, a circulation path 30 for circulating ballast water is formed so as to circulate through the ultraviolet reactor 12. Specifically, the circulation path 30 is a part of the line La of the ballast device 1, a part of the line Lb, a part of the line Lc, a line Ld, a part of the first line L1 of the ballast water treatment device 10, and a fourth line. It is a closed road connecting L4, a part of the third line L3, and the fifth line L5. At this time, the ballast pump 3 continues to operate, and the ballast water is circulated for a predetermined time with the ultraviolet reactor 12 energized. Here, the predetermined time is a time sufficient for the ultraviolet reactor 12 to irradiate the entire ballast water in the circulation path 30 with ultraviolet rays. Although the circulation path 30 of the present embodiment shares a part of the line of the ballast device 1 and is used, a line different from the line of the ballast device 1 may be introduced separately. However, in this case, it is preferable to separately provide a pump for circulating ballast water in the circulation path 30 on the circulation path.

After that, the control means 15 turns off the power to the ultraviolet reactor 12, and in a state where the power to the ultraviolet reactor 12 is turned off, further circulates the ballast water in the circulation path 30. As a result, the ultraviolet lamp 21 of the ultraviolet reactor 12 is cooled. By circulating the ballast water once the ultraviolet reactor 12 is energized, the ballast water that has been filtered and sterilized is used as the ballast water that is circulated for cooling the ultraviolet lamp 21.

<Measurement step S3>
Next, the measurement step S3 performed after the completion of the cooling step S2 will be described with reference to the flowchart of FIG. 7 and FIG. After the completion of the cooling step S2, the control means 15 of the ballast water treatment device 10 of the present embodiment first closes the on-off valve Vc and opens the on-off valve Vf to drain the circulated ballast water. After that, the control means 15 closes the on-off valve V4 and opens the on-off valve 42 of the measuring water introducing means 14. As a result, the fresh water (measurement water) stored in the measurement water storage tank 40 is introduced into the third line L3 via the measurement water introduction line 41 (step S31). The fresh water introduced into the third line L3 is introduced into the treatment tank 20. Then, the control means 15 circulates the fresh water in the treatment tank 20 by continuing the supply of the fresh water by the measurement water introduction means 14, replaces the ballast water remaining in the treatment tank 20 with the fresh water, and replaces the ballast water remaining in the treatment tank 20 with the fresh water. Fill the inside of 20 with fresh water (step S32). At this time, the opening degree adjusting valve FCV and the on-off valve Vf are opened, and the fresh water flowing through the treatment tank 20 is discharged from the outboard discharge port SC2 (see FIG. 8).

Next, with the fresh water circulating in the treatment tank 20, the control means 15 turns on the ultraviolet lamp 21 of the ultraviolet reactor 12 again (step S33). After that, the control means 15 measures the illuminance in the treatment tank 20 through the fresh water by the ultraviolet sensor 13. (Step S34) When the measured illuminance in the processing tank 20 is equal to or less than a predetermined value, the control means 15 has dirt on the quartz protective tube 22 of the ultraviolet reactor 12 or the sensor window of the ultraviolet sensor 13. As a warning (step S35). Here, the predetermined value is a value that is predetermined with reference to the illuminance measured through fresh water in the normal state (when the ballast water treatment device 10 is introduced, etc.). However, as a predetermined value, a value calculated from the illuminance measured in the previous measurement step S3 can also be used. In this case, when the difference from the previous measurement is large, the increase in dirt can be detected.

The reason why the measurement is performed in the state where the fresh water is circulated is to avoid the temperature rise of the fresh water due to the ultraviolet lamp 21. Further, when the ultraviolet reactor 12 can adjust the illuminance (electric energy), it is preferable to turn on the ultraviolet reactor 12 with the weakest illuminance in order to suppress the power consumption at the time of measurement. Further, while the fresh water is being circulated in the treatment tank 20, the opening degree of the opening degree adjusting valve FCV is preferably kept as small as possible so that the temperature rise of the fresh water by the ultraviolet lamp 21 is suppressed. This makes it possible to reduce the amount of fresh water used.

By the way, it seems that the dirt adhering to the quartz protective tube 22 and the sensor window of the ultraviolet sensor 13 can be detected by the decrease in the illuminance of the ultraviolet rays measured by the ultraviolet sensor 13 during the normal purification step S1. However, the quality of the ballast water flowing through the ultraviolet reactor 12 in the purification step S1 is not constant and unknown. Therefore, since it is difficult to determine whether the ballast water transmittance is reduced or the quartz protective tube 22 and the sensor window are dirty only by the measurement by the ultraviolet sensor 13, the measurement step S3 is introduced separately. be.

Then, by introducing the measurement step S3, by measuring the illuminance of ultraviolet rays through fresh water whose water quality (transmittance) is known, dirt can be detected without being affected by the water quality of ballast water. Is possible.

The measuring water introduction means 14 (measuring water introduction line 41) is connected to the third line L3 at a position downstream of the connection position with the fourth line L4, and this position is preferably the ultraviolet reactor 12 ( The position is preferably close to the treatment tank 20). This is because the amount of fresh water to be circulated can be reduced by locating the position close to the ultraviolet reactor 12 (treatment tank 20). However, the measuring water introducing means 14 can be installed at any position as long as it can supply fresh water to the ultraviolet reactor 12 (treatment tank 20).

1.4 Modifications The invention according to this embodiment can also be implemented in the following aspects.
-In the above-described embodiment, the measurement step S3 is performed after the cooling step S2, but the measurement step S3 can also be performed before the cooling step S2. Further, even when the ballast water treatment apparatus 10 does not perform the cooling step S2, it is possible to perform the measurement step S3.
-In the above-described embodiment, the fresh water introduced by the measurement water introduction means 14 in the measurement step S3 is configured to be discharged from the outboard discharge port SC2 after being circulated in the treatment tank 20 (see FIG. 8). However, also in the measurement step S3, the same circulation path 30 as in the cooling step S2 can be formed, and the fresh water introduced by the measurement water introduction means 14 can be circulated in the circulation path 30. By using the same circulation path 30 as the cooling step S2, the transition from the cooling step S2 to the measurement step S3 can be smoothly performed. Further, since it is not necessary to add a new configuration, it is possible to detect dirt adhering to the sensor window of the quartz protective tube 22 and the ultraviolet sensor 13 without complicating the device or incurring additional cost.
-In the above embodiment, the circulation device 30 is not included in the circulation path 30, but it is possible to configure the circulation path 30 to include the filtration device 11. In this case, in the case where the fresh water introduced by the measuring water introducing means 14 is circulated in the circulation path 30 in the measuring step S3, the measuring water introduction line 41 of the measuring water introducing means 14 is set in the filtration device 11. It is also possible to connect to the flow path of.
-In the above-described embodiment, fresh water is used as the measurement water, but a liquid whose permeability is obvious, a liquid whose water quality (permeability) is known, or a liquid whose water quality is constant may be used. It is possible.
-In the above embodiment, the measurement water introduction line 41 of the measurement water introduction means 14 is connected to the third line L3 at a position downstream of the connection position with the fourth line L4, but the measurement water introduction line 41 The position to be connected is not limited to this. It can be connected to any place as long as the fresh water can be introduced into the treatment tank 20 of the ultraviolet reactor 12.
-In the above embodiment, an example in which the ballast water treatment device 10 is applied to the ballast device 1 as a liquid treatment device is shown, but the liquid treatment device of the present invention is not only for treating ballast water, but also for rivers, lakes and marshes. It can be used as a liquid treatment device for treating various types of water such as ponds and industrial water.

2. Second Embodiment Next, the ballast water treatment apparatus 10 according to the second embodiment of the present invention will be described. The ballast water treatment device 10 of the present embodiment is similar to the ballast water treatment device 10 according to the first embodiment. Therefore, in the following, only the differences from the ballast water treatment apparatus 10 of the first embodiment will be described, and the description of the same contents will be omitted.

The ballast water treatment device 10 according to the present embodiment is different from the ballast water treatment device 10 according to the first embodiment in that the control means 15 performs the protective tube cleaning step S4 after the measurement step S3. Specifically, in the ballast water treatment device 10 according to the first embodiment, when the illuminance in the treatment tank 20 through the fresh water by the ultraviolet sensor 13 is equal to or less than a predetermined value, the control means 15 of the ultraviolet reactor 12 It was configured to issue a warning on the assumption that the quartz protective tube 22 was dirty (see steps S33 to S35 in FIG. 7). On the other hand, in the ballast water treatment device 10 according to the present embodiment, when the control means 15 detects dirt, the control means 15 executes a protective tube cleaning step S4 for cleaning the quartz protective tube 22 (see FIG. 9). Hereinafter, the protective tube cleaning step S4 executed following the measurement step S3 will be described.

<Protective tube cleaning step S4>
In the control means 15 of the present embodiment, as shown in FIG. 9, when the illuminance in the treatment tank 20 through the fresh water becomes equal to or less than a predetermined value by the ultraviolet sensor 13, dirt is detected in step S35 (step S34 in FIG. 7). And step S35), after turning off the ultraviolet lamp 21, the protective tube cleaning step S4 is executed.

In the protective tube cleaning step S4 of the present embodiment, as shown in FIGS. 2A and 2B, the wiper 24 is moved along the slide shaft 24b arranged in parallel with the ultraviolet lamp 21 to clean the quartz protective tube 22. .. Here, the operation of the wiper 24 in the protective tube cleaning step S4 is to close the on-off valve 42 and the opening degree adjusting valve FCV (see FIG. 1) of the measuring water introduction means 14, so that the inside of the processing tank 20 is used in the measuring step S3. It is preferable to carry out the process in a state of being filled with fresh water. After the cleaning operation of the quartz protective tube 22 by the wiper 24 is completed, the opening adjustment valve FCV and the on-off valve Vf (see FIG. 1) are opened. Then, the fresh water containing dirt adhering to the quartz protective tube 22 is discharged from the treatment tank 20, the protective tube cleaning step S4 is completed, and the operation step by the control means 15 is completed (see FIG. 9).

By such a protective tube cleaning step S4, the control means 15 can clean the quartz protective tube 22 and recover the ultraviolet irradiation amount when dirt is detected in the measuring step S3. The protective tube cleaning step S4 may be manually performed by a user such as a crew member.

On the other hand, as shown in FIG. 9, when dirt is not detected in step S35, the control means 15 ends the operation step without performing the protective tube cleaning step S4.

The control means 15 turns on the ultraviolet lamp 21 of the ultraviolet reactor 12 again after operating the wiper 24 in the protective tube cleaning step S4 and before discharging the fresh water from the treatment tank 20, and uses the ultraviolet sensor 13 to turn on the fresh water. It is also preferable to measure the illuminance in the processing tank 20 through the process. By comparing the illuminance in the treatment tank 20 after the completion of the protective tube cleaning step S4 with the illuminance in the treatment tank 20 in the measurement step S3, it is possible to confirm the degree of dirt removal.

3. 3. Third Embodiment Next, the ballast water treatment apparatus 10 according to the third embodiment of the present invention will be described. The ballast water treatment device 10 of the present embodiment is similar to the ballast water treatment device 10 according to the second embodiment. Therefore, in the following, only the differences from the ballast water treatment apparatus 10 of the second embodiment will be described, and the description of the same contents will be omitted.

The ballast water treatment apparatus 10 of the present embodiment is the same as the configuration of the second embodiment in that the protective tube cleaning step S4 is performed after the measurement step S3 (see FIG. 9), but the control means 15 is the protective tube cleaning step. The method of cleaning the quartz protective tube 22 is different in S4. Since the ballast water treatment device 10 of the present embodiment is used in the protective tube cleaning step S4, as shown in FIG. 10, the ballast water treatment device 10 is placed in the treatment tank 20 of the ultraviolet reactor 12 via the measurement water introduction line 41 of the measurement water introduction means 14. A chemical introduction means 16 for introducing a chemical is provided.

Specifically, the chemical introduction means 16 is connected to the measuring water introduction line 41 at a position downstream of the on-off valve 42. The chemical introduction means 16 includes a chemical storage tank 60 for storing a chemical solution as a chemical, a chemical introduction line 61, and a chemical introduction valve 62. The chemical introduction means 16 of the present embodiment opens the chemical introduction valve 62 under the control of the control means 15 to introduce the chemical liquid into the treatment tank 20 of the ultraviolet reactor 12 via the measurement water introduction line 41 and the third line L3. It is possible to do. The dirt adhering to the quartz protective tube 22 is, for example, a scale on which calcium or magnesium is deposited, and a chemical solution for removing such scale is used. Hereinafter, the protective tube cleaning step S4 executed following the measurement step S3 will be described.

<Protective tube cleaning step S4>
In the control means 15 of the present embodiment, as shown in FIG. 9, when the illuminance in the treatment tank 20 through the fresh water becomes equal to or less than a predetermined value by the ultraviolet sensor 13, dirt is detected in step S35 (step S34 in FIG. 7). And step S35), after turning off the ultraviolet lamp 21, the protective tube cleaning step S4 is executed.

In the protective tube cleaning step S4 of the present embodiment, by opening the chemical introduction valve 62 of the chemical introduction means 16 under the control of the control means 15, the treatment tank of the ultraviolet reactor 12 passes through the measurement water introduction line 41 and the third line L3. The chemical solution stored in the chemical storage tank 60 is introduced into the 20. The chemical solution introduced into the treatment tank 20 by the chemical introduction means 16 is diluted with the fresh water used in the measurement step S3. Then, in the treatment tank 20, the quartz protective tube 22 is washed with the diluted chemical solution. The introduction of the chemical solution by the chemical introduction means 16 in the protective tube cleaning step S4 involves closing the on-off valve 42 and the opening adjustment valve FCV (see FIG. 1) of the measuring water introducing means 14 to measure the inside of the processing tank 20. It is carried out in a state of being filled with the fresh water used in S3. After cleaning the quartz protective tube 22 with the chemical solution for a predetermined time, the opening adjustment valve FCV and the on-off valve Vf (see FIG. 1) are opened. Then, the diluted chemical solution containing dirt adhering to the quartz protective tube 22 is discharged from the treatment tank 20, the protective tube cleaning step S4 is completed, and the operation step by the control means 15 is completed (see FIG. 9). When, for example, an acidic solution is used as the chemical solution, it is preferable to introduce a neutralizing agent to neutralize the solution in which the chemical solution is mixed, and then discharge the solution.

The control means 15 turns on the ultraviolet lamp 21 of the ultraviolet reactor 12 again after introducing the chemical solution into the processing tank 20 by the chemical introducing means 16 in the protective tube cleaning step S4 and before discharging the fresh water from the processing tank 20. It is also preferable to measure the illuminance in the treatment tank 20 through the fresh water with the ultraviolet sensor 13. By comparing the illuminance in the treatment tank 20 after the completion of the protective tube cleaning step S4 with the illuminance in the treatment tank 20 in the measurement step S3, it is possible to confirm the degree of dirt removal. Alternatively, after the protective tube cleaning step S4 is completed, the fresh water is discharged from the treatment tank 20, the fresh water is introduced into the treatment tank 20 again by the measurement water introduction means 14, and the ultraviolet lamp 21 of the ultraviolet reactor 12 is turned on again. It is also preferable to measure the illuminance in the treatment tank 20 through the fresh water with the ultraviolet sensor 13. By comparing the illuminance in the processing tank 20 filled with fresh water after the completion of the protective tube cleaning step S4 with the illuminance in the processing tank 20 in the measuring step S3, the cleaning effect before and after the protective tube cleaning step S4 can be further improved. It is possible to confirm accurately.

The control means 15 of the present embodiment can clean the quartz protective tube 22 and recover the ultraviolet irradiation amount when dirt is detected in the measurement step S3 by such a protective tube cleaning step S4. .. Further, in the present embodiment, the fresh water used in the measurement step S3 can be reused as diluted water, and it is possible to save valuable fresh water in the ship.

On the other hand, as shown in FIG. 9, when dirt is not detected in step S35, the control means 15 ends the operation step without performing the protective tube cleaning step S4.

<Modification 1 of the third embodiment>
In the third embodiment, as shown in FIG. 10, the chemical introduction means 16 is connected to the measurement water introduction line 41 at a position downstream of the on-off valve 42. However, the position where the chemical introduction means 16 is connected is not limited to this. For example, as shown in FIG. 11, the chemical introduction means 16 can be directly connected to the ultraviolet reactor 12 (treatment tank 20) without passing through the measurement water introduction line 41. The chemical introduction means 16 can be arranged at any position as long as the chemical can be introduced into the processing tank 20.

Further, as shown in FIG. 11, it is also preferable that the ballast water treatment device 10 is provided with an air supply means 17 for supplying air to the treatment tank 20 of the ultraviolet reactor 12. In the protective tube cleaning step S4, the chemical solution is effectively mixed with fresh water by supplying air to the processing tank 20 by the air supply means 17 to perform aeration, and the processing tank 20 is cleaned with a uniform cleaning solution. Is possible.

In addition, in the case of this configuration, it is also preferable to add the on-off valve 18 at a position on the upstream side of the measurement water introduction line 41 of the third line L3. In this case, by closing the on-off valve 18 in the protective tube cleaning step S4, it is possible to reduce the amount of fresh water used to fill the treatment tank 20 of the ultraviolet reactor 12 and effectively perform aeration. Become.

<Modification 2 of the third embodiment>
In the third embodiment, in the protective tube cleaning step S4, the control means 15 introduces the chemical solution into the treatment tank 20 filled with fresh water by the chemical introduction means 16 connected to the measurement water introduction line 41, thereby quartz. The structure was such that the protective tube 22 was washed. However, as the protective tube cleaning step S4, it is also preferable to have a configuration in which the processing tank 20 of the ultraviolet reactor 12 is cleaned while circulating chemicals.

In this case, as shown in FIG. 12, the chemical introduction means 16 includes the chemical storage tank 60, the chemical introduction line 61, the chemical introduction valve 62, the circulation path 70, the circulation pump 71, and the return valve. 72 and an inlet valve 73 are preferably provided. One end side of the circulation path 70 is connected to the fifth line L5, and the other end side is connected to the measurement water introduction line 41 of the measurement water introduction means 14. The circulation pump 71 is arranged between the return port valve 72 and the inlet valve 73. For the circulation pump 71, for example, an air-driven pump is used. Further, a chemical introduction line 61 is connected to the circulation path 70 at a position between the return valve 72 and the circulation pump 71. In addition, in the case of this configuration, it is also preferable to add the on-off valve 18 at a position on the upstream side of the measurement water introduction line 41 of the third line L3 (see FIG. 12).

Then, when the protective tube cleaning step S4 is executed in such a configuration, the control means 15 fills the treatment tank 20 of the ultraviolet reactor 12 with fresh water by the measurement water introduction means 14, and then the return port valve 72 and the injection port valve. At the same time as opening 73, the on-off valve 18 and the opening-opening adjusting valve FCV are closed, and the on-off valve 42 of the measuring water introduction means 14 is also closed. Then, the chemical introduction valve 62 is opened, the chemical solution stored in the chemical storage tank 60 is introduced into the circulation path 70, and the introduced chemical solution is circulated with the treatment tank 20 of the ultraviolet reactor 12 by driving the circulation pump 71. It circulates with the road 70.

With such a configuration, the ballast water treatment device 10 according to the present modification can effectively mix the chemical solution with fresh water, and can wash the treatment tank 20 with a uniform washing solution.

In the case of this modification, the chemical storage tank 60, the chemical introduction line 61, the chemical introduction valve 62, the circulation path 70, the circulation pump 71, the return port valve 72, and the injection port valve 73 constituting the chemical introduction means 16 are unitized. It is also preferable that the cleaning unit is detachably attached to the ballast water treatment device 10. Further, in the above embodiment, a liquid chemical solution is used as the chemical introduced by the chemical introduction means 16. However, it is also possible to use a solid chemical and dissolve it in water for measurement to dilute it.

4. Fourth Embodiment Next, the ballast water treatment apparatus 10 according to the fourth embodiment of the present invention will be described. The ballast water treatment device 10 of the present embodiment is similar to the ballast water treatment device 10 according to the third embodiment. Therefore, in the following, only the differences from the ballast water treatment apparatus 10 of the third embodiment will be described, and the description of the same contents will be omitted.

The ballast water treatment apparatus 10 of the present embodiment is the same as the configuration of the second embodiment in that the protective tube cleaning step S4 is performed after the measurement step S3 (see FIG. 9), but the control means 15 is the protective tube cleaning step. The method of cleaning the quartz protective tube 22 is different in S4. Hereinafter, the protective tube cleaning step S4 executed following the measurement step S3 will be described.

<Protective tube cleaning step S4>
In the control means 15 of the present embodiment, as shown in FIG. 9, when the illuminance in the treatment tank 20 through the fresh water becomes equal to or less than a predetermined value by the ultraviolet sensor 13, and dirt is detected in step S35 (measurement step of FIG. 7). (See also S3), after turning off the ultraviolet lamp 21, the protective tube cleaning step S4 is executed.

In the protective tube cleaning step S4 of the present embodiment, as shown in FIG. 13, the control means 15 first cleans the quartz protective tube 22 with the wiper 24, and then cleans the quartz protective tube 22 with a chemical. .. Since the specific operations of cleaning with the wiper 24 and cleaning with chemicals have already been described in the second embodiment or the third embodiment, detailed description thereof will be omitted.

As described above, in the protective tube cleaning step S4 of the present embodiment, the control means 15 can further enhance the cleaning power of the quartz protective tube 22 by sequentially executing the cleaning with the wiper 24 and the cleaning with chemicals. .. Therefore, when dirt is detected in the measurement step S3, it is possible to recover the ultraviolet irradiation amount more effectively.

<Modified example of the fourth embodiment>
In the fourth embodiment described above, as the protective tube cleaning step S4 for cleaning the quartz protective tube 22, a mode (see FIG. 13) in which cleaning is performed by the wiper 24 and then cleaning is performed using chemicals by the chemical introduction means 16. bottom. However, the order of cleaning with the wiper 24 and cleaning with chemicals is not limited to this. That is, when dirt is detected in the measurement step S3, it is also possible to first perform cleaning with chemicals by the chemical introduction means 16 and then perform cleaning with the wiper 24.

Further, in the fourth embodiment described above, the control means 15 continuously executes cleaning with the wiper 24 (step S41) and cleaning with a chemical (step S42). However, the control means 15 may execute the measurement step S3 again after cleaning with the wiper 24, and when dirt is detected again, perform cleaning with a chemical. Alternatively, when dirt is detected in the measurement step S3, cleaning with a chemical may be performed first, and cleaning with the wiper 24 may be performed only when dirt is detected even if the measurement step S3 is executed again.

1: Ballast device 2: Ballast tank 3: Ballast pump 10: Ballast water treatment device (liquid treatment device)
11: Filtering device 12: Ultraviolet reactor 13: Ultraviolet sensor 14: Measuring water introduction means 15: Control means 16: Chemical introduction means 17: Air supply means 18: On-off valve 20: Treatment tank 21: Ultraviolet lamp 22: Quartz protective tube 24 : Wiper 24a: Scraper 24b: Slide shaft 30: Circulation path 40: Measurement water storage tank 41: Measurement water introduction line 42: On-off valve 60: Chemical storage tank 61: Chemical introduction line 62: Chemical introduction valve 70: Circulation path 71: Circulation pump 72: Return port valve 73: Inlet valve L1 to L5: Line La to Le: Line P1: Upstream side connection part P2: Downstream side connection part S1: Purification process S2: Cooling process S3: Measurement process SC1: Sea chest SC2: Outboard discharge port V1 to V4: On-off valve Va to Vf: On-off valve FCV: Opening adjustment valve

Claims (7)

A liquid processing device that processes liquids with ultraviolet rays.
It is equipped with an ultraviolet reactor, an ultraviolet sensor, a measuring water introduction means, and a control means.
The ultraviolet reactor includes an ultraviolet lamp and a treatment tank in which the ultraviolet lamp is arranged.
The ultraviolet sensor measures the illuminance of ultraviolet rays emitted by the ultraviolet lamp.
The measuring water introduction means is configured to introduce the measuring water for measuring the illuminance into the treatment tank.
The control means is a liquid treatment apparatus that lights the ultraviolet lamp in a state where the measurement water is circulated in the treatment tank, and measures the illuminance through the measurement water by the ultraviolet sensor. The liquid processing apparatus according to claim 1.
The measurement water introduction means includes a measurement water storage tank and a measurement water introduction line.
The water introduction line for measurement is connected to the upstream line on the upstream side of the lines connected to the treatment tank.
The measurement water introduction means is a liquid treatment apparatus configured to introduce the measurement water stored in the measurement water storage tank into the treatment tank via the upstream line. The liquid processing apparatus according to claim 1 or 2.
A liquid processing apparatus including a circulation path for circulating the liquid flowing through the ultraviolet reactor with the outside. The liquid processing apparatus according to claim 3.
The control means performs a cooling step of turning off the ultraviolet lamp and circulating the processed liquid through the circulation path, and a measuring step of turning on the ultraviolet lamp and circulating the measurement water through the circulation path. A liquid processing device to control. The liquid processing apparatus according to any one of claims 1 to 4.
A liquid treatment apparatus in which the measurement water is fresh water. The liquid processing apparatus according to any one of claims 1 to 5.
Equipped with a protective tube for the ultraviolet lamp
A liquid processing apparatus having at least one of the following configurations (1) to (3).
(1) A wiper for cleaning the protective tube is provided, and when the measured illuminance is equal to or less than a predetermined value, the control means controls the protective tube to be cleaned by the wiper, assuming that dirt is detected.
(2) A chemical introduction means for introducing a chemical into the ultraviolet reactor is provided, and when the measured illuminance is equal to or less than a predetermined value, the control means detects stains in the ultraviolet reactor by the chemical introduction means. A chemical is introduced into the protective tube, and the protective tube is controlled to be cleaned by the chemical.
(3) A wiper for cleaning the protective tube and a chemical introduction means for introducing chemicals into the ultraviolet reactor are provided, and the control means detects dirt when the measured illuminance is equal to or less than a predetermined value. First, the chemical introduction means controls to introduce the chemical into the ultraviolet reactor and cleans the protective tube with the chemical, and then the wiper controls to clean the protective tube. A method for detecting stains in an ultraviolet reactor, in which measurement water for measuring illuminance is circulated in a treatment tank in which an ultraviolet lamp is arranged, the ultraviolet lamp is turned on, and the illuminance is measured through the measuring water by an ultraviolet sensor.

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