JP5824653B2 - Ballast water treatment equipment - Google Patents

Description

  The present invention relates to a ballast water treatment apparatus.

  In order to carry out stable navigation of the ship, this ship is appropriately loaded and discharged with ballast water at its anchorage, but the anchorage where ballast water is taken in and the anchorage where it is discharged. Since it is often different from the ground, destruction of the ecosystem is a problem.

  In other words, if aquatic species such as aquatic organisms and bacteria that lived in a berth where the ballast water was taken in are discharged in a berth that differs from the environment, the ecosystem of the species in the basin is destroyed. There are things.

  Then, the ballast water treatment apparatus which tries to prevent destruction of the ecosystem mentioned above by processing ballast water is proposed (for example, refer to the following patent documents 1).

International Publication No. 2008/039146

  The ballast water treatment apparatus includes a ballast water treatment container having a ballast water inlet and a ballast water outlet, and an ultraviolet irradiation means provided detachably in the ballast water treatment container. Biological species such as organisms and bacteria are destroyed or sterilized by directly or indirectly irradiating ultraviolet rays.

  However, in this way, in the case of destroying and sterilizing biological species such as aquatic organisms and bacteria with ultraviolet rays, the inner surface coating of the pipe connected to the ballast water inlet or the ballast water outlet of the ballast water treatment container, etc. There is a risk of deterioration due to ultraviolet rays.

  That is, the inner surface of the pipe is provided with an inner surface film such as polyethylene resin for the purpose of preventing corrosion against seawater or the like, but if this inner surface film is deteriorated by ultraviolet rays, the pipe will be corroded. .

The present invention provides a ballast water treatment apparatus using ultraviolet light irradiation means, in which peripheral element adjacent to at least the ballast water inlet port, and to prevent the deterioration by ultraviolet rays.

The present invention to achieve this object, the ballast water treatment vessel having a ballast water outlet and contact ballast water inlet, an ultraviolet irradiation means disposed for free desorption in the ballast water treatment vessel and the photocatalyst The ballast water treatment vessel is formed so that a cross-sectional area in a direction perpendicular to the water flow is reduced toward the ballast water flow inlet side, and the ballast water flow inlet and a light shielding plate provided between the ultraviolet light irradiation means, the light shielding plate, which was arranged to form a space between the inner wall of the ballast water treatment vessel and its outer edge, the light shielding plate, A plurality of holes are provided, and a plurality of holes are provided at predetermined intervals. Of the plurality of light shielding plates, a hole provided in the light shielding plate near the ultraviolet irradiation means side is provided on the ultraviolet irradiation means side. It is obtained by less than the hole provided farther the light shielding plate. Peripheral elements thereby close to the ballast water inlet port, thereby preventing the deterioration by ultraviolet rays.

The present invention as described above, the ballast having a ballast water treatment vessel having a ballast water outlet and contact ballast water inlet, an ultraviolet radiation means and the photocatalyst provided freely desorption in the ballast water treatment vessel, the In the water treatment apparatus, the ballast water treatment container is formed so that a cross-sectional area in a direction perpendicular to the water flow is reduced toward the ballast water flow inlet side, and the ballast water flow inlet, the ultraviolet irradiation means, a light shielding plate provided between the light shielding plate, which was arranged to form a space between the inner wall of the ballast water treatment vessel and its outer edge, the light shielding plate is provided with a plurality of holes A plurality of light shielding plates are provided at a predetermined interval, and a hole provided in the light shielding plate near the ultraviolet irradiation means side among the plurality of light shielding plates is formed in the light shielding plate far from the ultraviolet irradiation means side. Setting Its dependent which was smaller than the hole, the ultraviolet rays toward the peripheral element adjacent to the ballast water inlet from said ultraviolet light irradiation means is shielded by the light shielding plate, as a result, is possible to prevent the deterioration of the peripheral element it can.

The perspective view of the ship carrying one embodiment of the present invention. Configuration diagram of the main part Configuration diagram of the main part Sectional view of the main part Perspective perspective view from below of the main part

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 of FIG. 1 shows the ship moored in the port 2, and the sea chest 4 is provided below the waterline 3 of this ship 1. FIG.

  FIG. 2 shows the ballast water intake and discharge path of the ship 1.

  That is, when ballast water is taken into the ship 1, the switching valve 5 in the ship 1 is first switched to the sea chest 4 side, the switching valve 7 is switched to the inlet 8 side, and then the pump 9 in the ship 1 is turned on. To drive.

  Then, for example, seawater flows from the sea chest 4 as ballast water, and is then taken into the ballast tank 10 via the pump 9 and the inlet 8.

  When discharging the ballast water in the ballast tank 10, the switching valve 5 is switched to the outlet 11 side, the switching valve 7 is switched to the side opposite to the inlet 8, and then the pump 9 is driven.

  Then, the ballast water in the ballast tank 10 is discharged out of the ship 1 from the outlet 11 through the switching valve 5, the pump 9, and the switching valve 7 through the sea chest 4.

  FIG. 3 shows a ballast water treatment device 12 interposed between the pump 9 and the switching valve 7 in FIG.

As shown in FIG. 4, the ballast water treatment apparatus 12 includes a cylindrical ballast water treatment container 15 having a ballast water inlet 13 and a ballast water outlet 14, and an example of ultraviolet irradiation means in the ballast water treatment container 15. Are provided, and a plurality of photocatalysts 17 disposed between the ultraviolet lamps 16 are provided.
The ultraviolet lamp 16 and the photocatalyst 17 are detachably provided in the ballast water treatment container 12.

  Further, a light shielding plate 18 is provided between the ballast water inlet 13 and the ultraviolet lamp 16 which is an ultraviolet irradiation means.

  Further, as shown in FIG. 3, dust existing in the ballast water taken from the sea chest 4 and large aquatic organisms having a size of 50 μm or more are removed upstream of the ballast water inlet 13 of the ballast water treatment vessel 15. A filter container 19 is connected.

  In the above configuration, when the ballast water is taken into the ship 1, first, the switching valve 5 in the ship 1 is switched to the sea chest side and the switching valve 7 is set to the inlet 8 side as described with reference to FIG. Next, the pump 9 in the ship 1 is driven.

  Then, for example, seawater flows from the sea chest 4 as ballast water, and then is taken into the ballast tank 10 via the pump 9 and the inlet 8.

  For this reason, the ballast water that has passed through the sea chest 4 and the pump 9 is first supplied into the filter container 19 where the dust present in the ballast water and large aquatic organisms having a size of 50 μm or more are removed. .

  In this state, the ballast water is then supplied from the ballast water inlet 13 into the ballast water treatment vessel 15.

  As described with reference to FIG. 4, a plurality of ultraviolet lamps 16 provided as an example of ultraviolet irradiation means and a plurality of photocatalysts 17 disposed between the ultraviolet lamps 16 are provided in the ballast water treatment container 15.

  For this reason, living organisms such as aquatic organisms and bacteria are generated by the ultraviolet rays from the ultraviolet lamp 16 provided in the ballast water treatment container 15 and the activated hydroxyl radicals generated by the photocatalyst 17 that has received the ultraviolet rays. The seed will be killed.

  Then, the ballast water in which species such as aquatic organisms and bacteria are killed in this way is then supplied to the ballast tank through the ballast water outlet 14, the switching valve 7, and the inlet 8 of the ballast water treatment container 15. 10 is taken in.

  In this way, in order to kill biological species such as aquatic organisms and bacteria, it is necessary to irradiate intense ultraviolet rays. Therefore, the ballast water treatment vessel 15 containing the ultraviolet lamp 16, the ballast water inflow port 13, the ballast water outflow port 14 and the pipes communicating with them are also exposed to this intensity of ultraviolet light.

  Here, in the ballast water treatment vessel 15, for example, when the photocatalyst 17 is formed on the surface thereof, hydroxyl radicals that are effectively activated by receiving ultraviolet rays are generated on the surface of the photocatalyst 17. At the same time, the ballast water treatment container 15 can be protected.

  However, the ballast water inlet 13, the ballast water outlet 14, and the pipes communicating with the ballast water inlet 13 are subjected to ultraviolet rays, so that the inner surface of polyethylene resin or the like formed on the surface can be prevented from being corroded by ballast water (for example, seawater). There is a risk of deterioration of the film.

  Therefore, in the present embodiment, a light shielding plate 18 is provided between the ballast water inlet 13 and the ultraviolet lamp 16 as shown in FIG.

  That is, by providing the light shielding plate 18, ultraviolet rays directed from the ultraviolet lamp 16 toward the ballast water inlet 13 are shielded, and thereby a polyethylene resin for preventing corrosion provided on the inner surface of the pipe connected to the ballast water inlet 13. This prevents the inner surface coating and the like from deteriorating.

  In addition, since ultraviolet rays are irradiated from the ultraviolet lamp 16 to the pipe side connected to the ballast water outlet 14, it is also considered to provide a light shielding plate 18 between the ballast water outlet 14 and the ultraviolet lamp 16. In this embodiment, as described above, the light shielding plate 18 is provided only between the ultraviolet lamp 16 and the ballast water inlet 13.

  This is because, as shown in FIG. 3, the pipe connected to the ballast water inlet 13 is provided below the floor of the ship 1, so it is difficult to replace when deteriorated, but it is connected to the ballast water outlet 14. This is because the pipe to be used is exposed on the floor surface and can be easily replaced periodically.

  Further, in this way, in the case where the light shielding plate 18 is provided only between the ballast water inlet 13 and the ultraviolet lamp 16, the ballast water treatment container is compared with the case where the light shielding plate 18 is also provided between the ballast water outlet 14 and the ultraviolet lamp 16. It is possible to prevent the pressure loss due to 15 from increasing.

  FIG. 5 is a perspective view from below of the light shielding plate 18 installed at the ballast water inlet 13.

  As shown in FIG. 5, the ballast water flowing into the ballast water treatment container 15 from the ballast water inlet 13 through the pipe is provided with a large number of holes in the light shielding plate 18, thereby providing the ballast water treatment container 15. Can diffuse inside.

  That is, the ballast water is diffused by the light shielding plate 18 in this way, and the ballast water treatment container 15 is caused to flow into the ballast water treatment container 15 from the ballast water inlet 13 at a uniform flow rate. Since aquatic species such as aquatic organisms and bacteria contained in the ballast water can be irradiated with ultraviolet rays in a homogeneous state and can be uniformly contacted with the photocatalyst 17, the aquatic organisms are more effectively used. And can kill biological species such as bacteria.

  Further, as shown in FIG. 5, a plurality of light shielding plates 18 and 18a are arranged at a predetermined interval between the ballast water inlet 13 and the ultraviolet lamp 16 or, although not shown, the ballast water outlet 14 and the ultraviolet lamp 16. Of the plurality of light shielding plates 18 and 18a, a hole provided in the light shielding plate 18 near the ultraviolet lamp (an example of the ultraviolet irradiation means) 16 is provided with an ultraviolet lamp (of the ultraviolet irradiation means). An example) It is good to make it smaller than the hole provided in the light shielding plate 18a far from 16.

  With such a configuration, the ballast water flowing from the ballast water inlet 13 can be gradually diffused in the ballast water treatment vessel 15 and guided to the ultraviolet lamp 16 and the photocatalyst 17 at a more uniform flow rate. I can do it.

  Further, by making the hole provided in the light shielding plate 18a near the ballast water inlet 13 (or the ballast water outlet 14) larger, the ballast water flow resistance (or the ballast water flow resistance 13) flowing into the ballast water treatment vessel 15 from the ballast water inlet 13 (or Ballast water flow resistance flowing out from the ballast water treatment vessel 15 to the ballast water outlet 14) can be reduced.

  At this time, the holes provided in the light shielding plates 18 and 18a can be more effectively diffused by forming the holes in different positions in the water flow direction.

  Moreover, when the ballast water inflow port 13 facing the light shielding plates 18 and 18a is a circular opening, the light shielding plates 18 and 18a are also preferably formed in a disk shape. That is, when the ballast water flows into the ballast water treatment container 15 from the ballast water inlet 13, the water flow is most concentrated near the center of the ballast water treatment container 15, so that the disk-shaped light shielding plate 18 is located near the center. , 18a can effectively diffuse the incoming ballast water.

  Furthermore, as shown in FIG. 5, the cross-sectional area in the direction perpendicular to the water flow of the ballast water treatment vessel 15 from the ultraviolet lamp 16 side toward the ballast water inlet 13 side becomes smaller. The area of the light shielding plate 18a far from the ultraviolet lamp 16 may be smaller than the area of the light shielding plate 18 close to the ultraviolet lamp 16. Accordingly, it is possible to effectively shield ultraviolet rays from the ultraviolet lamp 16 toward the pipe while minimizing the area of the light shielding plates 18 and 18a.

  At this time, it is desirable to arrange the light shielding plates 18 and 18 a so as to form a space between the outer edge portion and the inner wall of the ballast water treatment vessel 15. By providing this space, the ballast water diffused by the light shielding plates 18 and 18a can flow into the ballast water treatment vessel 15 without receiving an excessive resistance.

(Embodiment 2)
For the second embodiment, in order to avoid complication of the explanation, the same configuration as that of the first embodiment is simplified and the feature portions will be described in detail.

  This embodiment is characterized in that an ultraviolet absorber is provided on the surface of the light shielding plate 18 on the ultraviolet lamp (ultraviolet irradiation means) 16 side.

  Ultraviolet rays are reflected by the wall surface of the ballast water treatment vessel 15 and the light shielding plate 18, and are also present in the vicinity of the ballast water inlet 13. Therefore, by providing an ultraviolet absorber on the light shielding plate 18, not only the ultraviolet rays directed from the ultraviolet lamp 16 to the pipe are blocked, but also the ultraviolet rays are absorbed by the ultraviolet absorber provided on the light shielding plate 18 to prevent irregular reflection. The ultraviolet ray existing near the ballast water inlet 13 is weakened.

  Further, the inside of the ballast water treatment container 15 is heated by heat generated from the ultraviolet lamp 16. Components such as calcium contained in seawater are likely to be precipitated as calcium carbonate in a high temperature environment, and when they are deposited on the surface of the ultraviolet lamp 16, the irradiation intensity is significantly reduced by blocking the irradiation of ultraviolet rays.

  In this regard, in the present embodiment, the light shielding plates 18 and 18a are heated by absorbing the ultraviolet rays with the ultraviolet absorber, so that components such as calcium contained in the seawater are installed upstream of the ballast water treatment apparatus. It can be deposited when passing through the light-shielding plates 18 and 18a. Thereby, precipitation of calcium carbonate or the like on the surface of the ultraviolet lamp 16 on the downstream side of the ballast water treatment device can be suppressed. Furthermore, since the ultraviolet lamp 16 emits visible light having a strong intensity in addition to the ultraviolet light, the ultraviolet light absorber is made black, so that the visible light is absorbed and the temperature of the light shielding plates 18 and 18a is increased. This makes it easier not only to remove the calcium component, but also to confirm the effect of removing the calcium component by showing a high contrast color change that the surfaces of the black light shielding plates 18 and 18a are whitened. You can also.

  Further, when a component such as calcium is deposited on the light shielding plates 18 and 18a in this way, the light shielding plates 18 and 18a are also periodically provided together with the ultraviolet lamp 16 and the photocatalyst body 17 in the ballast water treatment vessel 15. It is desirable to replace it.

  In addition, a photocatalyst etc. are utilized as an ultraviolet absorber in this embodiment.

(Embodiment 3)
The present embodiment is characterized in that an ultraviolet reflecting plate as an ultraviolet shielding plate is provided between the ballast water inlet 13 and the ultraviolet lamp 16. As a result, the ultraviolet ray from the ultraviolet lamp 16 toward the pipe is reflected and shielded, and the ultraviolet ray in the ballast water treatment container 15 can be increased by returning the ultraviolet ray toward the ballast water treatment container 15.

  In addition, it is possible to use a metal with high ultraviolet reflectivity, such as aluminum, as the ultraviolet reflector in this embodiment.

  As described above, the present invention comprises a ballast water treatment container having a ballast water inlet and a ballast water outlet, and an ultraviolet irradiation means and a photocatalyst body that are detachably provided in the ballast water treatment container. Since a light-shielding plate is provided between the inlet and the ultraviolet irradiation means and at least one of the ballast water outlet and the ultraviolet irradiation means, the ballast water inlet or the ballast water flow is provided from the ultraviolet irradiation means. Ultraviolet rays directed to the peripheral elements close to the outlet are shielded by the light shielding plate, and as a result, deterioration of the peripheral elements can be prevented.

  Therefore, utilization as a ballast water treatment apparatus for ships is expected.

DESCRIPTION OF SYMBOLS 1 Ship 2 Port 3 Waterline 4 Sea chest 5 Switching valve 7 Switching valve 8 Inflow port 9 Pump 10 Ballast tank 11 Outlet 12 Ballast water treatment apparatus 13 Ballast water inflow port 14 Ballast water outflow port 15 Ballast water treatment container 16 Ultraviolet lamp 17 Photocatalyst 18, 18a Light shielding plate 19 Filter container

Claims (2)

Ballast water treatment vessel having a ballast water outlet and contact ballast water inlet, a ballast water treatment system comprising an ultraviolet irradiation means and photocatalyst provided freely desorption in the ballast water treatment vessel, the said ballast water treatment vessel, toward the ballast water inlet side, formed as the cross-sectional area in a direction perpendicular to the water flow is reduced, the light shielding plate provided between the ballast water inlet and said ultraviolet light irradiation means, The light shielding plate is arranged so as to form a space between an outer edge portion thereof and an inner wall of the ballast water treatment container. The light shielding plate is provided with a plurality of holes, and a plurality of holes are provided at predetermined intervals. Among the plurality of light shielding plates, a hole provided in the light shielding plate close to the ultraviolet irradiation means side is smaller than a hole provided in the light shielding plate far from the ultraviolet irradiation means side. Kushida ballast water treatment system. The ballast water treatment container has a ballast water inflow port for connecting a pipe provided under the floor and a ballast water outflow port connected to a pipe exposed on the floor surface, and the flow path is directed vertically from the floor surface side. The ballast water treatment apparatus according to claim 1, wherein a light shielding plate is disposed only between the ballast water inlet and the ultraviolet irradiation means.

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