Sterilization filtration device equipped with a bubble generator and ship ballast water treatment system using the same

Abstract

The present invention provides a sterilization and filtration device for sterilizing and filtering seawater flowing in from the outside, which includes an air supply unit for supplying air, a bubble generator for injecting the air supplied from the air supply unit into the seawater to disperse the air in the seawater and at the same time generate a turbulent flow to generate fine bubbles in the seawater, and a filter device for filtering the seawater in which the fine bubbles are generated through a filtration hole and applying an impact to organisms in the seawater passing through the filtration hole with the fine bubbles to kill the organisms.

Description

Technical Field

[0001] The present invention relates to a sterilization filtration device provided with a bubble generator and a ship's ballast water treatment system using the same.

Background Art

[0002] Generally, ships are provided with ballast tanks that can store ballast water in order to adjust the balance and draft of the ship.

[0003] FIG. 1 shows a conventional ship.

[0004] Referring to FIG. 1, in a conventional ship 10 during a ballasting operation, a ballast pump 13 provided on a seawater line 12 is operated, and seawater is supplied from a sea chest 11 to a ballast tank 14 through the seawater line 12.

[0005] Also, during a deballasting operation, the front end of the seawater line 12 is blocked through valve control, the ballast pump 13 is operated, and the ballast water discharged from the ballast tank 14 through a ballast water line 15 is discharged outside the hull through the seawater line 12 and a discharge line 16.

[0006] In such a manner, a normal ship fills the ballast tank with seawater through a ballasting operation at a port as needed and then operates. When it arrives at the destination, the ballast water stored in the ballast tank is discharged to the outside through a deballasting operation.

[0007] At this time, in the case of a ship that has traveled to a distant area or overseas, if the ballast water is discharged as it is during the deballasting operation, the alien organisms contained in the ballast water may cause disturbances to the surrounding marine ecosystem and may act as a cause of environmental damage.

Summary of the Invention

Problems to be Solved by the Invention

[0008] In the present invention, a sterilization and filtration device equipped with a bubble generator and a ship's ballast water treatment system using the same are provided. Specifically, when filtering seawater, by using fine bubbles generated through a bubble generator to kill organisms in the seawater, a sterilization and filtration device equipped with a bubble generator capable of sterilizing and filtering seawater and a ship's ballast water treatment system using the same are to be provided.

[0009] The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those with ordinary knowledge in the technical field to which the present invention belongs from the following description.

Means for Solving the Problems

[0010] In order to solve the problems as described above, the present invention provides a sterilization and filtration device for sterilizing and filtering seawater flowing in from the outside, which includes an air supply unit for supplying air, a bubble generator for injecting the air supplied from the air supply unit into the seawater, dispersing the air in the seawater, generating turbulent flow at the same time, and generating fine bubbles in the seawater, and a filter device for filtering the seawater in which the fine bubbles are generated through a filtration hole, and impacting organisms in the seawater passing through the filtration hole with the fine bubbles to kill the organisms.

[0011] Further, a sterilization and filtration device is provided which further includes a steam supply unit for supplying steam with a bubble generator so as to promote the death of organisms.

[0012] In addition, the bubble generator includes a pipe member in which a flow path through which seawater passes is formed, and an air injection port for injecting air supplied from an air supply unit into the seawater is formed; a porous plate installed on the flow path and having a plurality of dispersion holes formed therein; a first turbulent flow generator installed behind the porous plate on the flow path and having a first turbulent flow generation hole formed therein; and a second turbulent flow generator installed behind the first turbulent flow generator on the flow path and having a second turbulent flow generation hole with a diameter larger than that of the first turbulent flow generation hole. When seawater flows into the flow path, air is injected into the seawater through the air injection port, the injected air in the seawater is dispersed through the plurality of dispersion holes, and turbulent flow is generated through the first turbulent flow generation hole and the second turbulent flow generation hole to generate fine bubbles in the seawater, thereby providing a sterilization and filtration device.

[0013] In addition, the porous plate, the first turbulent flow generator, and the second turbulent flow generator are each provided with a plurality of holes formed therein according to the size of the holes, and a sterilization and filtration device is provided which is alternately formed by the pipe member so as to generate fine bubbles having a size corresponding to the filtration holes.

[0014] In addition, the porous plate, the first turbulent flow generator, and the second turbulent flow generator each include a throttle, and a sterilization and filtration device is provided in which the sizes of the dispersion holes, the first turbulent flow generation holes, and the second turbulent flow generation holes are adjustable by the throttle so as to generate fine bubbles having a size corresponding to the filtration holes.

[0015] In addition, the pipe member is formed of a plurality of pipes connected by mutual flanges, protruding pieces corresponding to the flanges are formed on the porous plate, the first turbulent flow generator, and the second turbulent flow generator, fastening holes for bolt-fastening to the flanges are formed in the protruding pieces, and a sterilization and filtration device is provided in which the porous plate, the first turbulent flow generator, and the second turbulent flow generator are respectively fastened to the corresponding flanges between the plurality of pipes.

[0016] Further, the filtration holes are formed with a width of 30 to 50 μm, the dispersion holes are formed with a diameter of 15 to 20 mm, the first turbulent flow generation holes are formed by holes that shield 40 to 60% of the inner flow path of the pipe member, the second turbulent flow generation holes are formed by holes that shield 20 to 40% of the inner flow path of the pipe member, and a sterilization filtration device is provided that forms fine bubbles of a size corresponding to the filtration holes through the dispersion holes, the first turbulent flow generation holes, and the second turbulent flow generation holes.

[0017] Also, the bubble generator provides a sterilization filtration device that generates fine bubbles of 1 to 100 μm in a seawater line for transferring seawater, a ballast tank into which seawater flows, or a filter device, so as to kill organisms in the seawater by the impact or pressure caused by the rupture of the bubbles.

[0018] Also, the filter device provides a sterilization filtration device including a main body housing in which an inlet and an outlet are formed, a plurality of filtration holes for filtering seawater flowing in through the inlet, a filter member for killing the seawater passing through the filtration holes through fine bubbles in the seawater, and an air discharge valve for discharging the air accumulated in the main body housing to the outside by the inflow of the fine bubbles.

[0019] Also, the filter member provides a sterilization filtration device that includes a plurality of filter members according to the size of the filtration holes and is detachably formed on the main body housing.

[0020] Also, the filter member provides a sterilization filtration device in which when seawater passes through a plurality of filtration holes, an air layer is formed on the filter member by fine bubbles in the seawater, and foreign substances contained in the seawater are laminated on the air layer during the process of filtering the foreign substances, thereby alleviating the phenomenon that the foreign substances are caught in the filtration holes.

[0021] Also, a sterilization filtration device is provided that is provided inside the main body housing and further includes a backwashing unit for backwashing the filter member.

[0022] Also provided is a sterilization filtration device including a first flow rate sensor provided on a connection line between an air supply unit and a bubble generator for detecting the flow rate of air supplied from the air supply unit to the bubble generator, and a first control valve provided behind the first flow rate sensor on the connection line. By adjusting the opening and closing amount of the first control valve using the flow rate value detected by the first flow rate sensor, an air amount adjusted corresponding to the flow rate value is supplied to the bubble generator.

[0023] Also provided is a sterilization filtration device including a second flow rate sensor provided on a connection line between a steam supply unit and a bubble generator for detecting the flow rate of steam supplied from the steam supply unit to the bubble generator, and a second control valve provided behind the second flow rate sensor on the connection line. By adjusting the opening and closing amount of the second control valve using the flow rate value detected by the second flow rate sensor, a steam amount adjusted corresponding to the flow rate value is supplied to the bubble generator.

[0024] On the other hand, in another aspect of the present invention for solving the above-described problems, in a ship's ballast water treatment system that sterilizes and filters seawater flowing in from the outside through a seawater inflow section and supplies it to a ballast tank, a seawater line connected between the seawater inflow section and the ballast tank and provided with a ballast pump for seawater transfer, a bubble generator provided on the seawater line for generating fine bubbles in the seawater flowing in through the seawater line, an air supply unit for supplying air for generating fine bubbles to the bubble generator, a filter device provided on the seawater line for filtering the seawater that has passed through the bubble generator to kill organisms in the seawater through the fine bubbles and discharging it to the ballast tank, a balance water line with one side connected to the ballast tank and the other side connected to the front end of the seawater line, a discharge line connected to the rear end of the seawater line for discharging the balance water transferred from the ballast tank to the outside through the balance water line and the seawater line during deballasting operation, and a control unit for controlling the ballasting operation and the deballasting operation.

Effects of the Invention

[0025] The sterilization and filtration device according to an embodiment of the present invention can sterilize and filter seawater by flowing fine bubbles generated through a bubble generator into a filter device and killing organisms in the seawater using the fine bubbles during seawater filtration through the filter device.

[0026] In addition, by adjusting the sizes of the dispersion holes and the turbulent flow generation holes that generate fine bubbles in the bubble generator, fine bubbles of a size corresponding to the filtration holes of the filter member provided in the filter device can be generated. During seawater filtration through the filter member, organisms in the seawater can easily collide with the fine bubbles in the process of passing through the filtration holes of the filter member together with the fine bubbles, and through this, the organisms in the seawater can be easily killed.

[0027] In addition, in the process of sterilizing and filtering seawater through the filter device, an air layer is formed on the filter member by the fine bubbles, and foreign substances are laminated on the air layer, so that the phenomenon of the foreign substances being sandwiched by the filter member can be effectively alleviated. Thereby, when backwashing the filter member, the foreign substances laminated on the filter member can be easily removed, and the backwashing efficiency can be increased.

[0028] In addition, the ship's ballast water treatment system according to an embodiment of the present invention can supply seawater that has been sterilized and filtered using a bubble generator and a filter device to a ballast tank. Even during deballasting operation, by re-sterilizing and re-filtering the ballast water discharged from the ballast tank using a bubble generator and a filter device and then discharging it to the outside of the hull, it is possible to effectively prevent ecosystem disturbance and environmental damage caused by the inflow of exotic organisms inside and outside the sea area.

[0029] The effects obtained by the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those with ordinary knowledge in the technical field to which the present invention belongs from the following description.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0032] The detailed description disclosed below together with the accompanying drawings is intended to explain exemplary embodiments of the present invention and is not intended to show the only embodiments in which the present invention can be implemented.

[0033] In the drawings, in order to clearly explain the present invention, parts not related to the explanation can be omitted, and the same reference numerals can be used for the same or similar components throughout the specification.

[0034] In the embodiments of the present invention, expressions such as "or" and "at least one" can each indicate one of the words listed together or a combination of two or more.

[0035] FIG. 2 shows a sterilization filtration device 100 including a bubble generator 120 according to an embodiment of the present invention, and FIG. 3 shows a detailed configuration of the bubble generator 120 according to an embodiment of the present invention.

[0036] A sterilization filtration device 100 including a bubble generator 120 according to an embodiment of the present invention is provided on a seawater line 220 connected to an in-ship ballast tank, and as a device for sterilizing and filtering seawater (or fresh water) flowing through the seawater line 220, it can kill organisms contained in the seawater using fine bubbles generated through the bubble generator 120, can alleviate the phenomenon that foreign substances are trapped in the filter member 134 by the fine bubbles, and can increase the cleaning efficiency during backwashing of the filter member 134.

[0037] In particular, the bubble generator 120 can generate fine bubbles of a size corresponding to the filtration holes of the filter member 134, and during seawater filtration, organisms in the seawater can easily collide with the fine bubbles during the process of passing through the filtration holes of the filter member 134 together with the fine bubbles, and through this, the organisms in the seawater can be easily killed.

[0038] Referring to FIGS. 2 and 3, a sterilization filtration device 100 according to an embodiment of the present invention may include an air supply unit 110, a bubble generator 120, and a filter device 130. The air supply unit 110 is connected to the bubble generator 120 and can supply air to the bubble generator 120.

[0039] Also, a first flow rate sensor 111 is provided in the connection line between the air supply unit 110 and the bubble generator 120, and the flow rate of the air supplied to the bubble generator 120 can be detected via the first flow rate sensor 111.

[0040] Also, a first control valve 112 is provided behind the first flow sensor 111 on the connection line, and by controlling the opening / closing amount of the first control valve 112, the amount of air supplied from the air supply unit 110 to the bubble generator 120 can be adjusted.

[0041] At this time, by controlling the opening / closing amount of the first control valve 112 using the flow rate value detected by the first flow sensor 111, the amount of air adjusted corresponding to the flow rate value can be supplied to the bubble generator 120.

[0042] The bubble generator 120 can generate fine bubbles using the air supplied from the air supply unit 110.

[0043] Such a bubble generator 120 can be connected to the front end of the filter device 130 or connected to the filter device 130 via the seawater line 220 (see FIG. 8) to supply fine bubbles to the filter device 130.

[0044] Here, the bubble generator 120 can generate fine bubbles having a size corresponding to the size of the filtration holes of the filter device 130 to be described later. As an example, in the present embodiment, the bubble generator 120 can generate fine bubbles of 1 to 100 μm and include fine bubbles corresponding to the size of the filtration holes of 30 to 50 μm.

[0045] Specifically, the bubble generator 120 of the present embodiment may include a pipe member 121 in which a flow path is formed inside so that seawater can pass through, and an air injection port 122 for injecting air into the flow path is formed; a porous plate 123 installed on the flow path of the pipe member 121; a first turbulent flow generator 125 disposed behind the porous plate 123 on the flow path of the pipe member 121; and a second turbulent flow generator 127 disposed behind the first turbulent flow generator 125 on the flow path of the pipe member 121.

[0046] Here, the pipe member 121 is in the form of a pipe with open front and rear ends and is connected to a seawater line 220 (see FIG. 8) through which seawater flows, allowing the seawater flowing in through the seawater line 220 (see FIG. 8) to pass through the inner flow path.

[0047] At this time, an air inlet 122 connected to the air supply unit 110 is formed on the side surface of the front end side of the pipe member 121, allowing the air supplied from the air supply unit 110 to flow into the inner flow path through the air inlet 122.

[0048] Also, the perforated plate 123 may be formed of a plate body in which a plurality of dispersion holes 124 are formed, and is installed on the flow path of the pipe member 121 to disperse the air flowing in together with the seawater.

[0049] That is, the perforated plate 123 is installed in a form that blocks the flow path of the pipe member 121, so that the seawater flowing into the inner flow path through the front end of the pipe member 121 passes through the plurality of dispersion holes 124 formed in the perforated plate 123 together with the air injected into the air inlet 122. In this process, the plurality of dispersion holes 124 formed in the perforated plate 123 can disperse the air contained in the seawater in a bubble form.

[0050] Also, the first turbulent flow generator 125 may be formed of a plate body in which a first turbulent flow generation hole 126 is formed at the center, and the second turbulent flow generator 127 may be formed of a plate body in which a second turbulent flow generation hole 128 having a diameter larger than that of the first turbulent flow generation hole 126 is formed at the center.

[0051] At this time, the first turbulent flow generator 125 and the second turbulent flow generator 127 are also installed in a form that blocks the flow path of the pipe member 121. The first turbulent flow generator 125 is installed behind the perforated plate 123 on the flow path of the pipe member 121, and the second turbulent flow generator 127 may be installed behind the first turbulent flow generator 125 on the flow path of the pipe member 121.

[0052] As a result, the seawater flowing into the inner flow path through the front end of the pipe member 121 is passed through the porous plate 123 together with the air injected into the air injection port 122, and the air contained in the seawater is dispersed in a bubble shape. Subsequently, by passing through the first and second turbulent flow generation holes 126 and 128 that cause turbulent flow, fine bubbles in the seawater can be generated due to the generation of turbulent flow.

[0053] At this time, the fine bubbles generated by the bubble generator 120 can flow into the filter device 130 and be used to kill organisms contained in the seawater.

[0054] As an example, each dispersion hole 124 formed in the porous plate 123 may be formed to have a diameter of about 15 to 20 mm. The first turbulent flow generation hole 126 formed in the first turbulent flow generator 125 may be formed as a hole that shields 40 to 60% of the flow path in the pipe member 121. The second turbulent flow generation hole 128 formed in the second turbulent flow generator 127 may be formed as a hole that shields 20 to 40% of the flow path in the pipe member 121. Through such dispersion holes 124, first turbulent flow generation holes 126, and second turbulent flow generation holes 128, fine bubbles of 1 to 100 μm can be generated.

[0055] In this case, it can be generated including fine bubbles of a size corresponding to the 30 to 50 μm filtration holes of the filter device 130 described later.

[0056] Also, the porous plate 123, the first turbulent flow generator 125, and the second turbulent flow generator 127 may be detachably provided on the pipe member 121.

[0057] Thus, for example, a plurality of porous plates 123 with different diameters of the dispersion holes 124, a plurality of first turbulent flow generators 125 with different diameters of the first turbulent flow generation holes 126, and a plurality of second turbulent flow generators 127 with different diameters of the second turbulent flow generation holes 128 are provided. When the size of the filtration holes of the filter device 130 is changed, the porous plates 123, the first turbulent flow generators 125, and the second turbulent flow generators 127 can be selectively alternated so as to generate fine bubbles corresponding to the changed size of the filtration holes.

[0058] Also, as another example, the dispersion holes 124 of the porous plates 123, the first turbulent flow generation holes 126 of the first turbulent flow generators 125, and the second turbulent flow generation holes 128 of the second turbulent flow generators 127 may be formed to be size-adjustable by applying a throttle structure or the like. When the size of the filtration holes of the filter device 130 is changed, the sizes of the dispersion holes 124, the first turbulent flow generation holes 126, and the second turbulent flow generation holes 128 can be selectively adjusted so as to generate fine bubbles corresponding to the changed size of the filtration holes.

[0059] Also, referring to FIG. 3, when installing the porous plate 123, the first turbulent flow generator 125, and the second turbulent flow generator 127 on the pipe member 121, as an example, the pipe member 121 is formed by a first pipe 121a, a second pipe 121b, a third pipe 121c, and a fourth pipe 121d connected by mutual flanges. The porous plate 123 is disposed between the flanges of the first pipe 121a and the second pipe 121b, the first turbulent flow generator 125 is disposed between the flanges of the second pipe 121b and the third pipe 121c, and the second turbulent flow generator 127 is disposed between the flanges of the third pipe 121c and the fourth pipe 121d.

[0060] At this time, protruding pieces 123a, 125a, 127a are formed on the porous plate 123, the first turbulent flow generator 125, and the second turbulent flow generator 127 so as to be sandwiched corresponding to between the flanges of the pipes. Fastening holes 123b, 125b, 127b are formed in the protruding pieces 123a, 125a, 127a so that bolts for fastening between the flanges can penetrate therethrough, and the protruding pieces 123a, 125a, 127a may be fastened between the flanges of the pipes.

[0061] On the one hand, referring to FIG. 2, the filter device 130 can sterilize and filter the seawater flowing in through the bubble generator 120.

[0062] Specifically, the filter device 130 of the present embodiment may include a main body housing 131 in which an inlet 132 and an outlet 133 are formed, a filter member 134 that sterilizes and filters the seawater flowing in through the inlet 132, an air discharge valve 135 for discharging the air flowing into the main body housing 131, and a backwashing unit 136 for backwashing the filter member 134.

[0063] Here, the main body housing 131 may be formed in a cylindrical shape, with an inlet 132 through which the seawater passing through the bubble generator 120 flows in on one side, and an outlet 133 through which the seawater sterilized and filtered by the filter member 134 is discharged on the other side. As an example, the main body housing 131 of the present embodiment may have an inlet 132 formed at the front end and an outlet 133 formed at the lower part.

[0064] Also, the filter member 134 may be formed in a pipe shape with an open front end, and a plurality of filtration holes may be formed on the outer peripheral surface so that the seawater flowing into the inside through the open front end can be filtered and discharged.

[0065] As an example, the outer peripheral surface of the filter member 134 may be formed of a lattice-like net, filtration holes may be formed between the nets, and the filtration holes may be formed with a width of 30 to 50 μm so as to effectively filter various foreign substances in the seawater.

[0066] At this time, the filter member 134 can be alternately provided in the main body housing 131 and can be alternated with a filter member having filtration holes of a size different from the above-described filtration holes according to the type of foreign substances.

[0067] Such a filter member 134 is horizontally arranged along the center inside the main body housing 131, and the open front end may be connected to the inlet 132 of the main body housing 131. As a result, the seawater flowing into the inlet 132 can move inside the filter member 134.

[0068] At this time, the seawater flowing into the inside of the filter member 134 and passing through the filtration holes on the outer peripheral surface can flow along the edge inside the main body housing 131 and be discharged to the outlet 133 at the lower part of the main body housing 131.

[0069] In the process of sterilizing and filtering seawater through the filter member 134, seawater containing fine bubbles is introduced into the inside of the filter member 134 through the inlet 132 of the main body housing 131 by the bubble generator 120. As a result, the introduced seawater will pass through the filtration holes of the filter member 134. However, foreign matters in the seawater are filtered by the filtration holes, and organisms in the seawater can collide with the fine bubbles and die during the process of passing through the filtration holes together with the fine bubbles.

[0070] At this time, the fine bubbles generated by the bubble generator 120 are formed in a size corresponding to the filtration holes of the filter member 134. Therefore, when the fine bubbles pass through the filtration holes of the filter member 134, they can easily collide with the organisms flowing into the filtration holes, and the organisms can be killed by the impact of the fine bubbles.

[0071] That is, it is a method of destroying the surface cell wall of organisms by the impact of fine bubbles to kill the organisms.

[0072] In addition, organisms in the seawater can also be killed by the impact of the rupture of fine bubbles. As an example, the fine bubbles generated through the bubble generator 120 can rupture during the process of flowing through the seawater line 220 (see FIG. 8) and inside the filter device 130, or after flowing into the ballast tank. However, the organisms around can be killed by the impact of the rupture of the fine bubbles, and the specific explanation for this will be described in detail through FIG. 4 which will be described later.

[0073] Further, the air discharge valve 135 may be provided at the upper part of the main body housing 131.

[0074] That is, the fine bubbles that have passed through the filter member 134 are accumulated as air at the upper part of the main body housing 131 due to the specific gravity difference, and the accumulated air can be discharged to the outside by using the air discharge valve 135.

[0075] Further, the backwashing unit 136 may include a rotating pipe 137 installed along the inner center of the filter member 134, a plurality of suction members 138 provided along the longitudinal direction of the rotating pipe 137 for sucking foreign matters attached to the inner surface of the filter member 134 and flowing them into the rotating pipe 137, and a motor unit 139 for rotating the rotating pipe 137.

[0076] Here, a backwashing pump (not shown) for providing a suction force so that the suction member 138 can suck foreign matters may be connected to the rotating pipe 137.

[0077] When performing the backwashing of the filter member 134, such a backwashing unit 136 rotates the rotating pipe 137 via the motor unit 139, so that the plurality of suction members 138 provided on the rotating pipe 137 rotate around the rotating pipe 137 and suck the foreign matters attached to the inner surface of the filter member 134 as a whole and flow them into the inside of the rotating pipe 137 together with seawater. The foreign matters flowing into the rotating pipe 137 can be discharged via a discharge line 250 (see FIG. 8).

[0078] FIG. 4 shows the principle by which organisms are killed by the rupture of fine bubbles according to an embodiment of the present invention.

[0079] In this embodiment, fine bubbles having a size of 1 to 100 μm can be generated through the bubble generator 120. Among the generated fine bubbles, the fine bubbles having a size corresponding to the filtration holes (e.g., 30 to 50 μm) of the filter member 134 can collide with organisms in seawater while passing through the filtration holes of the filter member 134 to kill the organisms.

[0080] In addition, the fine bubbles generated through the bubble generator 120 can kill the surrounding organisms while flowing inside the seawater line 220 (see FIG. 8) and the filter device 130 or while bursting after flowing into the ballast tank.

[0081] Specifically, referring to FIG. 4, the fine bubbles generated through the bubble generator 120 will rise to the water surface due to buoyancy, and are formed in a hemispherical shape surrounded by the film 1 at the water surface. When the film 1 starts to rupture while thinning due to gravity and capillary force, a rim 2 may be formed.

[0082] In addition, while the rim 2 and the film 1 are sucked into the water surface by surface tension, water accumulates inside the rim 2 and the film 1 and the volume increases. While the rim 2 moves symmetrically, the moving rim 2 can meet at a point in the lower part of the cavity 3 and collide to generate a high pressure.

[0083] In addition, the high pressure generated in this way can push the surrounding fluid to generate a fluid jet 4 and a submerged jet 5.

[0084] In the above process, the surrounding organisms can be effectively killed by the collision or pressure generated by the kinetic energy of the rim 2. When the size of the fine bubbles is 100 μm or less, the killing effect on organisms can appear to be excellent.

[0085] FIG. 5 shows the form of the filter member 134 according to an embodiment of the present invention, and FIG. 6 shows a state in which an air layer a and foreign matter f are laminated on the filter member 134 according to an embodiment of the present invention.

[0086] Referring to FIGS. 5 and 6, the filter member 134 of the present embodiment may be formed of a net woven in a zigzag shape.

[0087] When seawater passes through the filtration hole h, such a filter member 134 can form an air layer a on the filter member 134 by fine bubbles contained in the seawater, and foreign matter contained in the seawater is laminated on the air layer a, so that the phenomenon that the foreign matter f is caught in the filtration hole h can be alleviated.

[0088] In addition, since the phenomenon of foreign matter being pinched is alleviated by the air layer a of the filter member 134, when the filter member 134 is backwashed, the foreign matter f laminated on the filter member 134 can be easily removed, and through this, the filter member 134 can be cleaned cleanly.

[0089] As described above, the sterilization filtration device 100 according to the present embodiment generates fine bubbles through the bubble generator 120 and allows them to flow into the filter device 130, so that when filtering seawater through the filter member 134 in the filter device 130, the fine bubbles can effectively kill organisms contained in the seawater, form an air layer a on the filter member 134 through the fine bubbles to alleviate the phenomenon of foreign matter f being pinched, and greatly increase the cleaning efficiency when the filter member 134 is backwashed.

[0090] On the other hand, the sterilization filtration device 100 according to the present embodiment may further include a steam supply unit 140.

[0091] FIG. 7 shows a sterilization filtration device 100 provided with a steam supply unit 140 according to an embodiment of the present invention.

[0092] Referring to FIG. 7, a steam inlet 129 through which high-temperature steam supplied from the steam supply unit 140 is injected may be additionally formed in the pipe member 121 of the bubble generator 120.

[0093] Further, a second flow rate sensor 141 may be provided in the connection line between the steam supply unit 140 and the bubble generator 120, and the flow rate of the steam supplied to the bubble generator 120 can be detected via the second flow rate sensor 141.

[0094] Also, a second control valve 142 is provided behind the second flow rate sensor 141 on the connection line, and by controlling the opening and closing amount of the second control valve 142, the amount of steam supplied from the steam supply unit 140 to the bubble generator 120 can be adjusted.

[0095] At this time, by controlling the opening and closing amount of the second control valve 142 using the flow rate value detected by the second flow rate sensor 141, the amount of steam adjusted corresponding to the flow rate value can be supplied to the bubble generator 120.

[0096] The high-temperature steam supplied from the steam supply unit 140 may be injected into the pipe member 121 of the bubble generator 120 and may flow into the filter device 130 together with the fine bubbles generated by the bubble generator 120. In the filter device 130, the high-temperature steam flows in simultaneously during the process of killing organisms in seawater through the fine bubbles, so that the killing of organisms can be promoted.

[0097] On the other hand, FIGS. 8 and 9 illustrate the configuration and operating state of the ship's balanced water treatment system 200 according to an embodiment of the present invention.

[0098] Referring to FIGS. 8 and 9, the ship's balanced water treatment system 200 according to an embodiment of the present invention may include a seawater inflow unit 210, a seawater line 220, a bubble generator 120, a filter device 130, a backwash water line 230, a balanced water line 240, a discharge line 250, and a control unit (not shown).

[0099] Here, the seawater inlet 210 may be formed in a sea chest where seawater enters and exits the hull. The seawater flowing in from the seawater inlet 210 can be transferred to the ballast tank T via the seawater line 220 through the bubble generator 120 and the filter device 130.

[0100] Also, a ballast pump 221 and a flow meter 222 may be provided in front of the bubble generator 120 on the seawater line 220.

[0101] An air supply unit 110 may be connected to the bubble generator 120, and a steam supply unit 140 may be selectively connected.

[0102] Also, a first flow sensor 111 and a first control valve 112 may be provided in the connection line connecting the bubble generator 120 and the air supply unit 110, and a second flow sensor 141 and a second control valve 142 may also be provided in the connection line connecting the bubble generator 120 and the steam supply unit 140.

[0103] In the filter device 130, a backwash water line 230 is connected to the portion where the washing water is discharged, and the backwash water line 230 may be connected to a discharge line 250 for seawater discharge in the hull. Here, a backwash pump 231 and a flow meter 232 may be provided on the backwash water line 230.

[0104] Also, a bypass line 260 that bypasses the filter device 130 is connected to the seawater line 220, and the seawater that has passed through the bubble generator 120 can be selectively transferred through the bypass line 260 to bypass the filter device 130.

[0105] An equilibrium water line 240 for discharging equilibrium water during the deballasting operation may be connected to the ballast tank T, and the equilibrium water line 240 may be connected to the front end of the seawater line 220.

[0106] In addition, a discharge line 250 is connected to the rear end of the seawater line 220. During the deballasting operation, the equilibrium water transferred from the ballast tank T through the equilibrium water line 240 and the seawater line 220 can be discharged to the outside of the hull through the discharge line 250.

[0107] A control unit (not shown) can control the ballasting operation and the deballasting operation.

[0108] Specifically, referring to FIG. 8, during the ballasting operation, the control unit (not shown) can operate the ballast pump to transfer seawater from the seawater inlet 210 to the bubble generator 120 through the seawater line 220.

[0109] At the same time, the air supply unit 110 can be operated to supply air for generating fine bubbles to the bubble generator 120. Optionally, the air supply unit 110 and the steam supply unit 140 can be operated simultaneously to supply air and steam to the bubble generator 120.

[0110] Subsequently, the seawater containing fine bubbles while passing through the bubble generator 120 is transferred to the filter device 130 through the seawater line 220. The filter device 130 can filter foreign substances contained in the seawater and, at the same time, kill organisms contained in the seawater through the fine bubbles.

[0111] At this time, when the air supply unit 110 and the steam supply unit 140 are operated simultaneously, the seawater containing fine bubbles and steam while passing through the bubble generator 120 is transferred to the filter device 130, so that the high-temperature steam can promote the death of organisms when the organisms are killed through the fine bubbles.

[0112] Next, the seawater sterilized and filtered by the filter device 130 can be supplied to the ballast tank T through the rear end of the seawater line 220.

[0113] In the process of sterilizing and filtering seawater by the filter device 130, backwashing inside the filter device 130 may be performed simultaneously to clean the inside of the filter device 130, and the discharged washing water can be discharged to the outside of the hull through the discharge line 250 via the backwash water line 230 by the backwash pump 231 as sterilized washing water.

[0114] In the process of the above-described ballasting operation, the control unit (not shown) can analyze and predict the degree of biological death by fine bubbles in the filter device 130 using the flow rate of the inflowing seawater detected via the flow meter 222 provided on the seawater line 220, the air injection amount detected via the first flow sensor 111 of the air supply unit 110, or the steam injection amount detected via the second flow sensor 141 of the steam supply unit 140, etc., and can accumulate and store the analyzed and predicted information in the internal database.

[0115] Thereby, based on the information accumulated in the database, the amount of air or steam supplied to the bubble generator 120 can be adjusted corresponding to the inflow amount of seawater.

[0116] Also, the control unit (not shown) can detect the flow rate of the washing water discharged from the filter device 130 via the flow meter 232 provided on the backwash water line 230, and can calculate in real time the flow rate of the seawater supplied from the filter device 130 to the ballast tank T via the seawater line 220.

[0117] Referring to FIG. 9, during the deballasting operation, the control unit (not shown) can block the front end inlet side of the seawater line 220 through valve control, and operate the ballast pump 221 to allow the balance water discharged from the ballast tank T to flow into the seawater line 220 via the balance water line 240.

[0118] In addition, the equilibrium water flowing into the seawater line 220 is transferred to the filter device 130 in a state containing fine bubbles or a state containing fine bubbles and steam while passing through the bubble generator 120. The filter device 130 re-sterilizes and re-filters the equilibrium water and discharges it. The discharged equilibrium water can be discharged to the outside of the hull through the discharge line 250.

[0119] At this time, the rear end of the seawater line 220 connected to the ballast tank T can be blocked through valve control, so that the equilibrium water transferred from the filter device 130 to the seawater line 220 can flow into the discharge line 250.

[0120] In this way, in this embodiment, during the ballasting operation, seawater can be sterilized and filtered using the bubble generator 120 and the filter device 130 and then supplied to the ballast tank T. Also during the de-ballasting operation, the equilibrium water discharged from the ballast tank T is re-sterilized and re-filtered using the bubble generator 120 and the filter device 130 and then discharged to the outside of the hull, thereby effectively preventing ecological disturbances and environmental damage caused by the inflow of alien organisms in the sea area.

[0121] On the other hand, in the above-described embodiment, during the de-ballasting operation, the equilibrium water discharged from the ballast tank T is re-sterilized and re-filtered using the bubble generator 120 and the filter device 130 and then discharged. However, if re-sterilization and re-filtration of the equilibrium water are not necessary, the equilibrium water discharged from the ballast tank T can also bypass the filter device 130 through the bypass line 260 and be discharged to the outside.

[0122] In addition, although the ship equilibrium water treatment system 200 of the above-described embodiment has been described by taking an example of killing organisms in seawater using fine bubbles or steam, it is obvious that it may further include a UV sterilizer, an electrolyzer for generating hypochlorous acid, a disinfectant injector, etc. as auxiliary means.

[0123] As described above, the sterilization and filtration device 100 according to the embodiment of the present invention can sterilize and filter seawater by flowing the fine bubbles generated through the bubble generator 120 into the filter device 130 and killing the organisms in the seawater using the fine bubbles during the seawater filtration through the filter device 130.

[0124] Further, by adjusting the sizes of the dispersion holes 124 and the turbulent flow generating holes 126 and 128 for generating fine bubbles in the bubble generator 120, fine bubbles of a size corresponding to the filtration holes h of the filter member 134 provided in the filter device 130 can be generated. During the seawater filtration through the filter member 134, organisms in the seawater can easily collide with the fine bubbles in the process of passing through the filtration holes h of the filter member 134 together with the fine bubbles, and the organisms in the seawater can be easily killed through this.

[0125] Also, during the sterilization and filtration process of seawater through the filter device 130, an air layer a is formed on the filter member 134 by the fine bubbles, and when foreign matter f is laminated on the air layer a, the phenomenon that the foreign matter f is sandwiched by the filter member 134 can be effectively alleviated. Thereby, when backwashing the filter member 134, the foreign matter laminated on the filter member 134 can be easily removed, and the backwashing efficiency can be increased.

[0126] In addition, the ship's ballast water treatment system 200 according to the embodiment of the present invention can supply the seawater sterilized and filtered using the bubble generator 120 and the filter device 130 to the ballast tank T. Even during the deballasting operation, by re-sterilizing and re-filtering the ballast water discharged from the ballast tank T using the bubble generator 120 and the filter device 130 and then discharging it to the outside of the hull, the ecological disturbance and environmental destruction caused by the inflow of alien organisms in the sea area can be effectively prevented.

[0127] The embodiments of the present invention disclosed in this specification and the drawings are merely specific examples presented for the purpose of easily explaining the technical content of the present invention and assisting in the understanding of the present invention, and are not intended to limit the scope of the present invention.

[0128] Therefore, the scope of the present invention should be construed to include all changes or modifications derived based on the technical idea of the present invention in addition to the embodiments disclosed herein.

Claims

1. In a sterilization and filtration device for sterilizing and filtering seawater flowing in from the outside, an air supply unit for supplying air; a bubble generator that injects the air supplied from the air supply unit into the seawater, disperses the air in the seawater, and at the same time generates a turbulent flow to generate fine bubbles in the seawater; a filter device that filters the seawater in which the fine bubbles are generated through a filtration hole, impacts the organisms in the seawater passing through the filtration hole with the fine bubbles, and kills the organisms, and includes: The bubble generator generates fine bubbles of a size corresponding to the filtration hole, and induces a collision between the fine bubbles passing through the filtration hole and the organisms in the seawater when the seawater is filtered by the filter device. A sterilization and filtration device.

2. The sterilization and filtration device according to claim 1, further including a steam supply unit that supplies steam with the bubble generator so as to promote the death of the organisms.

3. The bubble generator includes: a pipe member in which a flow path through which seawater passes is formed, and an air injection port for injecting the air supplied from the air supply unit into the seawater is formed; a porous plate installed on the flow path and having a plurality of dispersion holes formed therein; a first turbulent flow generator installed behind the porous plate on the flow path and having a first turbulent flow generation hole formed therein; a second turbulent flow generator installed behind the first turbulent flow generator on the flow path and having a second turbulent flow generation hole with a diameter larger than that of the first turbulent flow generation hole, and includes: When seawater flows into the flow path, air is injected into the seawater through the air injection port, the air injected into the seawater is dispersed through the plurality of dispersion holes, and a turbulent flow is generated through the first turbulent flow generation hole and the second turbulent flow generation hole to generate fine bubbles in the seawater. The sterilization and filtration device according to claim 1.

4. The porous plate, the first turbulent flow generator, and the second turbulent flow generator are provided in a plurality according to the size of the holes formed inside each of them, and are alternately formed in the pipe member so as to generate fine bubbles of a size corresponding to the filtration hole. The sterilization and filtration device according to claim 3.

5. The porous plate, the first turbulent flow generator, and the second turbulent flow generator The sterilization filtration device according to claim 3, each including a throttle valve, wherein the sizes of the dispersion hole, the first turbulent flow generation hole, and the second turbulent flow generation hole are formed to be adjustable by the throttle valve so as to generate fine bubbles having a size corresponding to the filtration hole.

6. The bubble generator is In a seawater line for transferring seawater, a ballast tank into which seawater flows, or the filter device, generating fine bubbles of 1 to 100 μm so as to kill organisms in the seawater by the impact or pressure caused by bubble rupture, the sterilization filtration device according to claim 1.

7. The filter device includes A main body housing formed with an inlet and an outlet, A plurality of filtration holes for filtering the seawater flowing in through the inlet are formed, and a filter member for killing the seawater passing through the filtration holes through fine bubbles in the seawater, An air discharge valve for discharging the air accumulated in the main body housing to the outside by the inflow of the fine bubbles, the sterilization filtration device according to claim 1.

8. The filter member Is provided with a plurality of pieces according to the size of the filtration holes, and is detachably formed on the main body housing, the sterilization filtration device according to claim 7.

9. The filter member When the seawater passes through the plurality of filtration holes, an air layer is formed on the filter member by the fine bubbles in the seawater, and the foreign matter in the seawater is laminated on the air layer during the process of filtering the foreign matter contained in the seawater, thereby alleviating the phenomenon that the foreign matter is pinched by the filtration holes, the sterilization filtration device according to claim 7.

10. A first flow rate sensor provided on the connection line between the air supply unit and the bubble generator for detecting the flow rate of the air supplied from the air supply unit to the bubble generator, A first control valve provided behind the first flow rate sensor on the connection line, By adjusting the opening and closing amount of the first control valve using the flow rate value detected by the first flow rate sensor, supplying the bubble generator with an air amount adjusted corresponding to the flow rate value, the sterilization filtration device according to claim 1.

11. A second flow rate sensor provided on the connection line between the steam supply unit and the bubble generator for detecting the flow rate of the steam supplied from the steam supply unit to the bubble generator, A second control valve provided behind the second flow rate sensor on the connection line, and The sterilization filtration device according to claim 2, wherein the amount of steam adjusted corresponding to the flow rate value is supplied to the bubble generator by adjusting the opening and closing amount of the second control valve using the flow rate value detected by the second flow rate sensor.

12. In a ship's ballast water treatment system that sterilizes and filters seawater flowing in from the outside through a seawater inflow section and supplies it to a ballast tank, A seawater line connected between the seawater inflow section and the ballast tank and provided with a ballast pump for seawater transfer, and A bubble generator provided on the seawater line for generating fine bubbles in the seawater flowing in through the seawater line, An air supply section for supplying air for generating fine bubbles by the bubble generator, A filter device provided on the seawater line, filtering the seawater that has passed through the bubble generator through a filtration hole, giving an impact to organisms in the seawater passing through the filtration hole with the fine bubbles to kill the organisms, and then discharging it to the ballast tank, and The bubble generator generates fine bubbles of a size corresponding to the filtration hole, and induces a collision between the fine bubbles passing through the filtration hole and organisms in the seawater when the seawater is filtered by the filter device. A ship's ballast water treatment system.

13. A flow meter provided on the seawater line for detecting the flow rate of seawater flowing in from the seawater inflow section, A first flow rate sensor for detecting the amount of air supplied from the air supply section to the bubble generator, The ship's ballast water treatment system according to claim 12, further comprising: a control unit that analyzes the degree of killing of organisms by fine bubbles in the filter device using the flow rate of seawater detected via the flow meter and the amount of air detected via the first flow rate sensor, accumulates and stores the analyzed data, and adjusts the amount of air corresponding to the flow rate of the inflowing seawater based on the accumulated data.

14. A steam supply section for supplying steam to the bubble generator, and A second flow rate sensor for detecting the amount of steam supplied from the steam supply section to the bubble generator, and The control unit is When operating the steam supply unit, the degree of death of organisms in the filter device is analyzed using the flow rate of seawater detected via the flow meter, the amount of air detected via the first flow rate sensor, and the amount of steam detected via the second flow rate sensor, and the analyzed data is accumulated and stored internally. Based on the accumulated data, the amount of air or steam is adjusted corresponding to the flow rate of the inflowing seawater. The ship's balanced water treatment system according to claim 13.

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