JP6395046B2 - Ballast water treatment apparatus and filter cleaning method in ballast water treatment apparatus - Google Patents

Description

  The present invention relates to a ballast water treatment device that purifies ballast water stored in a ship and a filter cleaning method in the ballast water treatment device.

  In a ship such as a tanker, when navigating to the destination again after unloading the crude oil etc. of the cargo, water called ballast water is placed in the ballast tank provided in the ship in order to balance the navigating ship. Store. Ballast water is basically taken at the loading port and discharged at the loading port, so if they are located in different locations, plankton and bacterial microorganisms contained in the ballast water will move around the world. become. Therefore, if ballast water is discharged from a loading port in a sea area different from the cargo port, microorganisms in another sea area will be released to that port, which may destroy the ecosystem in that sea area.

For this reason, when the ballast water is stored in the ballast tank, it is required that the microorganisms in the ballast water be killed and detoxified.
Conventionally, as a ballast water treatment device that removes microorganisms from ballast water and renders it harmless, it is equipped with a filtration device with a filter in the casing and an ultraviolet irradiation device in the middle of the ballast water treatment line, and pumped up to the ballast water treatment line The water to be treated is filtered through a filtration device, and the treated water filtered by the filtration device is irradiated with ultraviolet rays by an ultraviolet irradiation device to kill microorganisms in the treated water and detoxify them, thereby detoxifying them. There is a ballast water treatment apparatus that supplies treated water to a ballast tank (for example, see Patent Document 1).

  In the ballast water treatment apparatus described in Patent Document 1, a filter of a very small opening mesh is used as the filter because the filter of the filtration apparatus is required to have a foreign substance removal performance. For this reason, it is important to clean the filter in order to prevent clogging and damage to peripheral equipment due to clogging.If the filter becomes clogged during water treatment operation, stop the water treatment operation immediately and remove the filter. The water treatment operation is restarted after washing to eliminate clogging.

JP2013-23187A

In the cleaning of the filter in the ballast water treatment apparatus described in Patent Document 1 above, the water treatment operation is stopped, and waiting for cooling after the ultraviolet lamp of the ultraviolet irradiation apparatus that has been at a high temperature is turned off. In the resumption of water treatment operation, after the filter is washed, the ultraviolet lamp is first turned on, and it is resumed after the ultraviolet lamp reaches a predetermined illuminance. Since the temperature at the time of lighting is high, it takes time to cool down after it is turned off, and it also takes time to start up the UV lamp after cleaning the filter. It takes a long time to clean up the water treatment operation.
As a result, there has been a problem that it takes time to store the ballast water in the ballast tank, and the cargo handling operation may be delayed.

  The object of the present invention is to stop the water treatment operation from the stop of the water treatment operation to the restart of the water treatment operation after washing the filter when the water treatment operation is urgently stopped due to clogging of the filter during the water treatment operation. An object of the present invention is to provide a ballast water treatment apparatus and a filter cleaning method in the ballast water treatment apparatus that can shorten the washing time.

  In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a filtration device provided with a filter in the casing and a washing mechanism for washing the filter in the middle of the ballast water treatment line, and the filtration An operation control means comprising an ultraviolet irradiation device on the downstream side of the apparatus, and further stopping the water treatment operation when the filter is clogged, washing the filter with the washing mechanism, and restarting the water treatment operation after washing. A ballast water treatment apparatus provided with a cooling water passage line for passing cooling water to the ultraviolet irradiation device, and the operation control means performs water treatment operation when the filter is clogged. Although it is stopped, the lighting state of the ultraviolet irradiation device is maintained, and cooling water is passed from the cooling water passage line to the ultraviolet irradiation device, so that the filtration device is washed. After as to resume the water treatment operation, it is characterized by having a control function to stop the water flow of cooling water to the UV irradiation device.

  According to the first aspect of the present invention, the ultraviolet irradiation device is provided with a cooling water passage line for passing cooling water, and the operation control means has a water treatment operation when the filter is clogged. The ultraviolet irradiation device is maintained in a lighting state, cooling water is passed from the cooling water passage line to the ultraviolet irradiation device, and the water treatment operation is resumed after the filtration device is washed. Since it has a control function to stop the flow of cooling water to the ultraviolet irradiation device, when the filter is clogged, after stopping the water treatment operation, the filter can be immediately cleaned by the cleaning mechanism, Since the water treatment operation can be resumed immediately after the filter is washed, the filter can be used from the stop of the water treatment operation when the water treatment operation is urgently stopped and the filter is washed. Shortening of the cleaning time to restart the water treatment operation after the washing can be reduced.

In the invention according to claim 2, a filter is provided in the casing in the middle of the ballast water treatment line and a cleaning mechanism for cleaning the filter is provided, and an ultraviolet irradiation device is provided on the downstream side of the filter. Provided with a cooling water flow line for passing cooling water to the ultraviolet irradiation device, and when the filter is clogged, the water treatment operation is stopped, the filter is washed by the washing mechanism, and water is washed after washing. a filter cleaning method in ballast water treatment system to resume the processing operation, when the clogging of the previous SL filter, with also stops the water treatment operation to maintain the lighting state of the ultraviolet irradiation apparatus, the cooling water passage water line The cooling water is allowed to flow through the ultraviolet irradiation device, and the water treatment operation is resumed after the filtration device is washed. The water flow of the water is characterized in that so as to stop.

According to the invention described in claim 2, when the clogging of the previous SL filter, with also stops the water treatment operation to maintain the lighting state of the ultraviolet irradiation apparatus, the ultraviolet irradiation device from the cooling water passage water line Since the cooling water is allowed to flow and the water treatment operation is restarted after washing the filtration device, and the cooling water flow to the ultraviolet irradiation device is stopped, the water treatment operation is performed when the filter is clogged. Water treatment operation when the filter is washed immediately by the washing mechanism, and the water treatment operation can be resumed immediately after washing the filter. It is possible to shorten the cleaning time from the stop of the cleaning to the resumption of the water treatment operation after the filter cleaning.

  According to the ballast water treatment device and the filter cleaning method in the ballast water treatment device according to the present invention, the water treatment operation in the case where the water treatment operation is stopped urgently and the filter is washed due to clogging of the filter during the water treatment operation. It is possible to reduce the cleaning time from the stop of the cleaning to the resumption of the water treatment operation after the filter cleaning, and the ballast water can be stored in the ballast tank in a short time.

It is a schematic sectional explanatory view showing an example of an embodiment of a ballast water treatment device concerning the present invention.

Hereinafter, an example of an embodiment of a ballast water treatment apparatus according to the present invention will be described in detail with reference to the drawings.
The ballast water treatment apparatus of this example irradiates ultraviolet rays onto the ballast water treatment line 1, pump 2 that pumps up the water to be treated, and pumps it, filtration apparatus 3, and treated water filtered by the filtration apparatus 3. An ultraviolet irradiation device 4 and a ballast tank 5 for storing treated water treated by irradiating ultraviolet rays are provided.

  In the ballast water treatment line 1, a treated water valve 6 is disposed between the pump 2 and the filtration device 3, and a treated water valve 7 is disposed between the filtration device 3 and the ultraviolet irradiation device 4. A water supply valve 8 is provided.

  In the filtering device 3, a filter 10 is provided in the casing 9 and a cleaning mechanism 11 for cleaning the filter 10 is provided. The cleaning mechanism 11 branches from a cleaning water injection nozzle 12 that injects cleaning water toward the outer peripheral surface of the filter 10 and a to-be-treated water pumping line 13 connected to the upstream side of the pump 2 to clean the to-be-treated water. The cleaning water supply line 14 supplies the cleaning water jet nozzle 12 as water, and the pump 15 is disposed in the cleaning water supply line 14 and pumps water to be treated as cleaning water to the cleaning water jet nozzle 12. An opening / closing valve 16 is provided in the cleaning water supply line 14.

In addition, the ultraviolet irradiation device 4 is provided with a cooling water passage line 17 through which the cooling water flows in the ultraviolet irradiation device 4.
In this example, the cooling water flow line 17 includes a cooling water feed line 17 a and a cooling water discharge line 17 b, and the cooling water feed line 17 a is a ballast water treatment between the treated water valve 7 and the ultraviolet irradiation device 4. The cooling water discharge line 17b is connected to the line 1a, and is connected to the ballast water treatment line 1b between the ultraviolet irradiation device 4 and the ballast water supply valve 8. The cooling water feed line 17a is provided with a pump 19 for feeding cooling water from the cooling water source 18 to the ultraviolet irradiation device 4, and an on-off valve 20 on the downstream side of the pump 19, and the cooling water discharge line 17b is opened and closed. A valve 21 is provided.

  Further, the filtration device 3 includes a differential pressure detection unit 22 that detects a differential pressure between the primary side and the secondary side of the filter 10, and the differential pressure detection unit 22 is provided on the primary side and the secondary side of the filter 10. Pressure sensors 23 and 24. The differential pressure between the primary side and the secondary side of the filter 10 can determine the degree of clogging of the filter 10, and when the differential pressure is large, it indicates that the filter 10 is clogged severely.

Furthermore, in this example, an operation control unit 25 that controls the water treatment operation operation based on the differential pressure between the primary side and the secondary side of the filter 10 detected by the differential pressure detection unit 22 is provided.
When the differential pressure detecting means 22 detects a preset differential pressure, the operation control means 25 stops the water treatment operation other than the ultraviolet irradiation device 4 and allows the ultraviolet irradiation device 4 to pass cooling water, 10 is cleaned by the cleaning mechanism 11, and after the cleaning, the cooling water flow to the ultraviolet irradiation device 4 is stopped and the control function of restarting the water treatment operation is provided.

  More specifically, when the differential pressure detection means 22 detects a preset differential pressure, the operation control means 25 stops the pump 2 that pumps up the water to be treated while the ultraviolet lamp of the ultraviolet irradiation device 4 is turned on. The treated water valve 6, the treated water valve 7, and the ballast water supply valve 8 are closed, and the on-off valves 20 and 21 provided in the cooling water feed line 17a and the cooling water discharge line 17b of the cooling water flow line 17 are opened. The pump 19 is driven, and the opening / closing valve 16 provided in the washing water supply line 13 is opened, and the function of driving the pump 15 and the opening / closing valve 16 provided in the washing water supply line 13 are closed after the filter 10 is washed, The pump 15 is stopped, the on-off valves 20 and 21 provided on the cooling water feed line 17a and the cooling water discharge line 17b of the cooling water flow line 17 are closed, and the pump 19 is stopped to be treated. To drive the pump 2 to pump comprises treated water valve 6, the processing water valve 7, the ability to open the ballast water supply valve 8.

According to the ballast water treatment apparatus configured as described above, when the differential pressure detecting means 22 detects a preset differential pressure, that is, when the filter 10 is clogged, the ultraviolet lamp of the ultraviolet irradiation device 4 is turned on. The pump 2 that pumps up the water to be treated is stopped while the light is turned on. However, since the cooling water sent from the cooling water passage line 17 flows into the ultraviolet irradiation device 4, the ultraviolet lamp is damaged due to high temperature, The peripheral device is prevented from being damaged by the heat emitted from the ultraviolet lamp.
And if a water treatment driving | operation is stopped, the filter 10 can be wash | cleaned immediately. During this time, the ultraviolet lamp of the ultraviolet irradiation device 4 is kept lit and maintains a predetermined illuminance, so that the water treatment operation can be resumed immediately after the filter 10 is washed.
As described above, at the time of cleaning the filter 10, it takes no time to cool the UV lamp of the UV irradiation device 4 when the operation is stopped, or to start up the UV lamp of the UV irradiation device 4 after cleaning the filter 10. The cleaning time from the stop of the water treatment operation to the resumption of the water treatment operation after washing the filter 10 can be greatly shortened.

  The filter cleaning method in the ballast water treatment apparatus according to the present invention is implemented by the above-described ballast water treatment apparatus. By performing the filter cleaning method in the ballast water treatment apparatus according to the present invention, the filter 10 is stopped from the stop of the water treatment operation. The cleaning time until the resumption of the water treatment operation after cleaning can be greatly reduced.

DESCRIPTION OF SYMBOLS 1 Ballast water treatment line 3 Filtration apparatus 4 Ultraviolet irradiation apparatus 5 Ballast tank 9 Casing 10 Filter 11 Cleaning mechanism 17 Cooling water flow line 22 Differential pressure detection means 25 Operation control means

Claims (2)

In the middle of the ballast water treatment line, a filter is provided in the casing, a filtration device provided with a cleaning mechanism for washing the filter, an ultraviolet irradiation device on the downstream side of the filtration device, and further, the filter is clogged. Sometimes, the ballast water treatment apparatus includes operation control means for stopping the water treatment operation, washing the filter by the washing mechanism, and restarting the water treatment operation after washing,
The ultraviolet irradiation device is provided with a cooling water passage line for passing cooling water, and the operation control means stops the water treatment operation when the filter is clogged, but the ultraviolet irradiation device is turned on. The cooling water flow through the cooling water flow line to the ultraviolet irradiation device, the water treatment operation is resumed after washing the filtration device, and the cooling water is passed through the ultraviolet irradiation device. A ballast water treatment apparatus comprising a control function for stopping. In the middle of the ballast water treatment line, a filter is provided in the casing, and a filtering device provided with a cleaning mechanism for cleaning the filter is provided, and an ultraviolet irradiation device is provided on the downstream side of the filtering device, and the ultraviolet irradiation device has cooling water. A ballast water treatment apparatus which has a cooling water passage line for passing water , stops water treatment operation when the filter is clogged, causes the filter to be washed by the washing mechanism, and resumes water treatment operation after washing. a filter cleaning method in,
When the clogging of the previous SL filter, with also stops the water treatment operation to maintain the lighting state of the ultraviolet irradiation apparatus, it is passed through the cooling water from the cooling water passage water line to the ultraviolet irradiation device, the filtration device A method for cleaning a filter in a ballast water treatment apparatus, wherein the water treatment operation is resumed after washing, and cooling water flow to the ultraviolet irradiation device is stopped.

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