JP6631850B2 - Ballast water filtration equipment - Google Patents

Description

The present invention relates to a filtration device for filtering ballast water of a ship, not only ballasting, but also in the case of deballasting in which the discharge of washing water is impossible and the filtration device cannot be used. The filtration device can be used, and the final filtration rate can be increased by re-filtration, and it is possible to prevent various foreign substances from flowing into the post-processing equipment and causing damage or failure. The present invention relates to a novel type of ballast water filtration apparatus which can be used in a small space.

Generally, ballast water is seawater filled inside a ship in order to maintain the balance of the ship, and is used at a scale of 5 to 10 billion tons annually worldwide.

There are various organisms in such ballast water, and most of these organisms are unable to adapt to the environment of their discharge sea area and die, but some resistant species survive and harbor the unique ecosystem of the port. There was a problem of disturbing.

For this reason, the International Maritime Organization (IMO) has developed a ballast water management system (BWMS), which is an international ship that must remove and kill organisms at the source and then discharge them. The Ballast Water Management Convention (IMOD2 regulation) was enacted. Based on such D2 regulations, the movement of marine organisms contained in ballast water between sea areas is not allowed, and upon discharge after movement, they must be killed, and the surviving marine organisms in the discharged water will be It is managed to satisfy the standard value or less.

Conventionally, various processing apparatuses are provided based on the D2 regulation of the IMO, and usually, as shown in FIGS. 1A and 1B, large marine organisms which are hardly killed by the post-processing equipment 7 are provided. Is filtered in advance by the filtration treatment device 1 so that the number of individuals flowing into the post-processing equipment 7 can be reduced, so that the energy used for killing can be reduced while satisfying the D2 regulation of the IMO. I have.

However, the conventional filtration apparatus 1 plays a role of filtering marine organisms and foreign matters larger than the pores of the filtration network used for the filtration processing apparatus. On the other hand, objects to be filtered are accumulated on the surface of the filtration network. This has the disadvantage that the processing flow rate is reduced due to the occurrence of clogging phenomenon, and periodic cleaning is performed to maintain such processing flow rate. In this connection, Korean Patent No. 10-156888, Korean Patent No. 10-2014-0088456, Korean Patent No. 10-2014-0071660, Korean Patent No. 10-1486501, Korean Patent No. No. 10-1486503, Korean Laid-Open Patent No. 10-2016-0064374, Korean Registered Patent No. 10-1406817, Korean Registered Patent No. 10-158249, and the like.

In particular, among the various types of ballast water filtration devices described above, the backwashing type filtration device detects clogging of the filtration network from a pressure difference between the front and rear of the filtration network, and detects the backwash water in a direction opposite to the filtration direction. And the microorganisms and foreign substances adhering to the surface of the filtration net are discharged together with the backwash water by removing the object to be filtered, thereby performing the cleaning by a method for eliminating the clogging phenomenon. .

However, considering that the backwash wastewater generated during such backwashing contains a lot of marine life, the ballasting (when ballast water flows into the ship) is the same sea area and will die. It can be discharged outboard without treatment, but during deballasting (when ballast water is discharged outboard), microorganisms adhering to the surface of the filtration network are microorganisms from other sea areas, and post-processing equipment (Electrolysis, ultraviolet rays, etc.) did not extinguish the waste according to the emission standards, so it was not possible to immediately discharge it outboard using the backwash method.

Thus, conventionally, as shown in FIG. 1a, the ballasting is performed in the order of the filtration treatment device 1 and the post-processing equipment 7, and in the case of deballasting in which backwashing cannot be performed, as shown in FIG. 1b. As described above, the filtration treatment apparatus 1 is skipped, and is processed only by the post-processing equipment 7 (for example, ultraviolet sterilization equipment) and is discharged outboard.

However, in the above-described general conventional treatment method, no filtration is performed at the time of ballasting, or foreign matter present in the ballast water storage tank 3 of the ship skips the filtration treatment device 1 at the time of deballasting, Since it immediately flows into the post-processing equipment 7, damage and failure of the post-processing equipment 7, such as damage to the ultraviolet lamp or the electrode, frequently occurred.

In particular, considering that a separate pipe 8 and valves 9a, 9b, and 9c for skipping the filtration treatment device 1 at the time of deballasting should be additionally provided, the application to the existing ship by this configuration is extremely large. It was difficult. In other words, when providing additional equipment for the treatment of ballast water to existing vessels that do not secure the installation space for ballast water treatment equipment at the time of construction, although space reduction is very important, The large space required by the additional provision of the piping 8 and the valves 9a, 9b, 9c described above made it practically difficult to apply the structure according to the prior art described above to existing ships.

Also, at the time of ballasting, marine organisms were large enough to pass through the filtration net, but if they grew so hard to be killed by the post-processing equipment 7 in the ballast water storage tank 3, no filtration treatment was performed. In addition, there is a problem that a large amount of energy is required in order to kill marine organisms so that only the post-processing facility 7 satisfies the emission standard.

Korean registered patent No. 10-156888 Korean Patent Publication No. 10-2014-0088456 Korean Registered Patent No. 10-2014-0071660 Korean Registered Patent No. 10-1486501 Korean Registered Patent No. 10-1486503 Korean Laid-Open Patent No. 10-2016-0064374 Korean Registered Patent No. 10-1406817 Korean Registered Patent No. 10-1587249

The present invention has been devised to solve the above-described various problems according to the related art, and its object is to eliminate the differential pressure even in the case of deballasting in which backwash water cannot be discharged. Backwashing is carried out, so that filtration can be performed in both ballasting and deballasting and the final filtration rate can be increased, and various foreign matter flows into the post-processing equipment during deballasting Another object of the present invention is to provide a new type ballast water filtration apparatus that can prevent damage or failure from being induced and can be installed in a smaller space.

In order to achieve the above object, a ballast water filtration treatment apparatus of the present invention comprises an untreated water inflow pipe connected to an inflow side pipe for guiding the flow of ballast water pumped by a ballast pump, and a post-treatment facility. A housing having a treated water outflow pipe connected to the inflow pipe, a plurality of filter elements for filtering foreign matter from ballast water flowing in from the untreated water inflow pipe and discharged through the treated water outflow pipe, A filter assembly having a washing water discharge pipe provided separately from an untreated water inflow pipe and a treated water outflow pipe; the backwash water discharged through the washing water discharge pipe of the filter assembly is unremoved from the filter assembly; A circulation flow path for guiding the re-inflow to the treated water inflow pipe; the circulation flow path being installed at a connection portion between the cleaning water discharge pipe and the circulation flow path and discharging the cleaning water. A washing water pump for pumping the backwash water discharged through the pump so that the backwash water is discharged outboard or forcedly circulated along the circulation flow path; and And a differential pressure elimination unit that is provided on the backwash water discharge side of the rinsing water pump and eliminates a differential pressure.

Here, the circulation channel, the washing water pump and the differential pressure eliminating unit are installed in the filter assembly so as to form a single module.

Further, the circulation flow path further includes an outboard discharge flow path for discharging backwash water outboard, and the circulation flow path and the outboard discharge flow path are provided for opening and closing a corresponding pipe. Are further provided, respectively.

Further, the side of the circulation flow path from which the backwash water is discharged is installed so as to penetrate around the untreated water inflow pipe and to be inserted into the untreated water inflow pipe, The end on the side where the backwash water is discharged is formed so as to be bent or round in the flow direction of the ballast water flowing along the untreated water inflow pipe, and the pipe end portion is gradually expanded. While the end is formed in a streamlined structure, a streamlined flow velocity accelerating blade is built in the inside of the end of the circulation flow path on the side where the backwash water is discharged, and the surface of the flow velocity acceleration blade is Is characterized by having a large number of contact fins protruding therefrom.

Further, the differential pressure eliminating portion becomes narrower toward the bottom, and a lower end is opened to discharge foreign matter, a plurality of auxiliary cyclones installed in the cyclone body, and each of the auxiliary cyclones. An inflow pipe for guiding backwash water to flow into each of the auxiliary cyclones through around the upper end of the cyclone, and an inflow pipe installed to penetrate around the upper part of the cyclone body and pass through each of the auxiliary cyclones An outflow pipe for guiding outflow of backwash water from which foreign matter has been separated, and a cap structure provided in a bottom side space in the cyclone body for preventing the foreign matter separated from each of the auxiliary cyclones from re-scattering. A scattering prevention plate and a plurality of guide vanes sequentially provided in the same manner, and a discharge valve provided below the cyclone body for selectively discharging foreign matter. Characterized in that it is composed of.

Further, the differential pressure eliminating unit is provided so as to communicate with an empty cylindrical body therein, a bottom surface of the body, and an inflow pipe connected to a ballast water inflow side of the circulation flow path; An outflow pipe connected to the ballast water outflow side of the circulation flow path, and an outflow pipe installed in the body so as to block the outflow pipe. A hole is drilled, and a rotary cylinder configured to rotate by driving a rotary motor, and is fixedly installed so as to block between the rotary cylinder and the outflow pipe, and a large number of through holes are formed on a peripheral surface. And a perforated pipe.

Further, the differential pressure eliminating unit is provided so as to communicate with an empty cylindrical body therein, a bottom surface of the body, and an inflow pipe connected to a ballast water inflow side of the circulation flow path; And an outlet pipe connected to the ballast water outflow side of the circulation flow path, and a space in the body in which the inflow pipe communicates and the outflow pipe communicate with each other. Along with being installed, a large number of through holes are drilled on the surface, and a partition plate formed so as to incline outwardly in the direction of ballast water flow, and a space side where the inflow pipe in the body communicates A rotating brush for crushing ballast water passing through the partition plate and flowing out through the outflow pipe while being rotated while being driven by a rotary motor.

The differential pressure canceling part is installed so as to communicate with an inner cylindrical body and one side of a peripheral surface of the body, and is connected to a ballast water inflow side of the circulation flow path. And an outflow pipe installed to communicate with the other side of the peripheral surface of the body and connected to a ballast water outflow side of the circulation flow path, and a side to which an inflow pipe communicates and an outflow pipe in the body. A porous crushing blade that is installed so as to block the communicating side and crushes ballast water that flows in from the inflow pipe and flows out through the outflow pipe while rotating by driving a rotary motor; It is characterized by comprising a semi-cylindrical punching and crushing plate which is positioned so as to block between the blade and the crusher, and further crushes microorganisms and foreign matter.

The washing water discharge pipe of the filter assembly may include a pipe through which the backwash water that has washed the plurality of filter elements is discharged.

In the housing, a partition plate having a plurality of passage holes communicating with the inside of the filter element while partitioning the upper and lower spaces is provided, and at the end of the washing water discharge pipe, each of the passage holes is provided. An airtight member that blocks a gap between them when they coincide with each other is further provided, wherein the airtight member is formed in a streamlined shape having a size capable of simultaneously closing two or more passage holes. The apparatus is characterized in that untreated water is prevented from being discharged through the washing water discharge pipe until before it coincides with one of the passage holes.

The housing is formed of a cylindrical body having an open upper surface and an internal space. The open upper surface is provided with a cover, and the cover is fixed to a cover lift. After being supported by the lift shaft, the lift shaft is coupled to and fixed to a vertically movable shaft. After being separated from the upper surface of the housing by the upward movement of the vertically movable shaft, the upper surface of the housing is completely opened by rotating the corresponding vertical shaft. The lifting and lowering of the lifting shaft is performed by operating a hydraulic jack.

As described above, the ballast water filtration treatment device of the present invention can be easily applied to not only a new ballast water treatment system but also a conventional ballast water treatment system by being provided in a single independent module. This has the effect.

In particular, since only the modularized ballast water filtration apparatus can be separated from the ballast water treatment system, the filter assembly can be easily maintained.

In addition, the ballast water filtration treatment device of the present invention is configured to pass through the filtration treatment device at the time of de-ballasting as well as at the time of ballasting, so that a separate pipe for skipping the filtration treatment device is provided. Since there is no need for a configuration, it is possible to reduce the size, and it is possible to install even if the installation space is not sufficiently secured in advance as in an existing ship.

At the same time, the ballast water filtration device of the present invention not only performs ballasting for storing ballast water in a ballast water storage tank from outside a ship but also transmits ballast water stored in the ballast water storage tank to a ship outside the ballast water. In the case of de-ballasting, the cleaning operation for each filter element can be performed while satisfying the IMOD D2 discharge regulations, so that the generation of differential pressure due to clogging of the surface of each filter element is prevented, and the post-processing equipment located at the subsequent stage This has the effect that breakage or failure of the device is not induced.

In particular, at the time of the ballasting, even though the microorganisms were large enough to pass through the filtration net, but survived and grew so hard to be killed by the post-treatment equipment in the ballast water storage tank, the microorganisms were not deballasted. In the post-treatment facility, the amount of energy used for dying to meet the emission standards of the IMOD2 can be reduced, and at the same time the same energy is used. There is an effect that even if a severe discharge standard is applied, it can be satisfied.

Further, the ballast water filtration device of the present invention reduces the back pressure in the backwash water recirculation pipe during backwash due to clogging during deballasting, thereby reducing the flow of backwash water recirculation. The effect of the backwash can be increased by smoothing.

Further, the ballast water filtration treatment device of the present invention has a streamlined structure of an airtight member serving as a discharge guide portion, and the cleaning water discharge pipe is moved from one of the passage holes to coincide with another passage hole. This has the effect of preventing unintentional discharge of non-cleaning water into the cleaning water discharge pipe.

At the same time, the ballast water filtration treatment device of the present invention has an effect that the recirculation flow rate of the backwash water can be increased by the structure of the circulation flow path on the discharge side and the structure of the pipe end portion.

It is a block diagram shown for explaining the flow of seawater and backwashing water at the time of ballasting of the conventional ballast water treatment system. It is a block diagram shown for explaining the flow of seawater at the time of deballasting of the conventional ballast water treatment system. It is a block diagram shown for explaining the ballast water treatment system to which the ballast water filtration treatment device concerning the embodiment of the present invention was applied. It is a block diagram shown for explaining the ballast water filtration processing device concerning the embodiment of the present invention. FIG. 4 is a state diagram illustrating a detailed structure of a filter assembly of the ballast water filtration apparatus according to the embodiment of the present invention. FIG. 4 is a state diagram illustrating a structure and a process for opening a cover in a filter assembly of the ballast water filtration apparatus according to the embodiment of the present invention. FIG. 4 is a state diagram illustrating a structure and a process for opening a cover in a filter assembly of the ballast water filtration apparatus according to the embodiment of the present invention. FIG. 4 is a state diagram illustrating a structure and a process for opening a cover in a filter assembly of the ballast water filtration apparatus according to the embodiment of the present invention. FIG. 3 is a state diagram illustrating a structure for opening a cover in a filter assembly of a conventional general ballast water filtration apparatus. It is a top view shown for explaining an airtight member of a discharge guide part in a filter assembly of a ballast water filtration treatment device concerning an embodiment of the present invention, and its operation. It is a top view shown for explaining an airtight member of a discharge guide part in a filter assembly of a ballast water filtration treatment device concerning an embodiment of the present invention, and its operation. It is a top view shown for explaining an airtight member of a discharge guide part in a filter assembly of a ballast water filtration treatment device concerning an embodiment of the present invention, and its operation. It is a principal part state diagram shown in order to explain the airtight member of the discharge guide part in the filter assembly of the ballast water filtration treatment device concerning the embodiment of the present invention, and its operation. It is a principal part state diagram shown in order to explain the airtight member of the discharge guide part in the filter assembly of the ballast water filtration treatment device concerning the embodiment of the present invention, and its operation. FIG. 5 is an enlarged view of a part “A” in FIG. 4. It is a state diagram shown in order to explain an example to a differential pressure eliminating part of a ballast water filtration treatment device concerning an embodiment of the present invention. It is a block diagram shown in order to explain the flow of seawater at the time of ballasting of the ballast water treatment system to which the ballast water filtration treatment device concerning the embodiment of the present invention was applied. It is a state figure shown in order to explain the state at the time of the filtration work during ballasting and deballasting of the ballast water filtration treatment device concerning the embodiment of the present invention. It is a block diagram shown for explaining the flow of the seawater at the time of filtration during ballasting and backwashing work of the ballast water filtration treatment equipment concerning an embodiment of the present invention. It is a state diagram shown in order to explain the state at the time of the filtration and back washing work in the middle of ballasting of the ballast water filtration treatment device concerning the embodiment of the present invention. It is a block diagram shown for explaining the flow of seawater at the time of filtration and backwashing work during deballasting of the ballast water filtration treatment device concerning an embodiment of the present invention. It is a state figure shown in order to explain the state at the time of filtration and back washing work during deballasting of the ballast water filtration treatment equipment concerning an embodiment of the present invention. It is a state diagram shown for explaining another example with respect to the differential pressure eliminating part of the ballast water filtration treatment device concerning the embodiment of the present invention. It is a state diagram shown for explaining another example with respect to the differential pressure eliminating part of the ballast water filtration treatment device concerning the embodiment of the present invention. It is a state diagram shown for explaining another example with respect to the differential pressure eliminating part of the ballast water filtration treatment device concerning the embodiment of the present invention. It is a state diagram shown for explaining another example with respect to the differential pressure eliminating part of the ballast water filtration treatment device concerning the embodiment of the present invention. It is a state diagram shown for explaining another example with respect to the differential pressure eliminating part of the ballast water filtration treatment device concerning the embodiment of the present invention.

Hereinafter, a preferred embodiment of the ballast water filtration apparatus of the present invention will be described with reference to FIGS.

FIG. 2 is a block diagram for explaining a ballast water treatment system to which the ballast water filtration treatment device according to the embodiment of the present invention is applied.

According to FIG. 2, the ballast water treatment system is a system including a filtration device for ballast water, and is configured to flow seawater to the ballast water filtration device 1 via a sea chest 9. An inflow-side pipe 2 for guiding, an outflow-side pipe 4 for guiding to be stored in a ballast water storage tank (hereinafter, referred to as a “storage tank”) 3 through the ballast water filtration device 1, and the inflow side Ballast water pump 5 for pumping the ballast water to flow through the pipe 2 and the outlet pipe 4, and guide the ballast water from the storage tank 3 to the tip of the ballast water pump 5 of the inlet pipe 2. And a post-processing facility (for example, an infrared sterilization facility) 7 installed in the outflow-side pipe 4. At this time, the outflow-side pipe 4 is provided with ballast water outboard. Exhaust The outboard discharge flow path 4a and the storage tank injection flow path 4b for storing ballast water in the storage tank 3 are further connected, and when the ballast water is discharged outboard, the ballast water that has passed through the post-processing facility 7 is discharged. It is configured to be discharged outboard via the outboard discharge passage 4a.

At the same time, the ballast water filtration apparatus 1 according to the embodiment of the present invention is provided on the inflow-side pipeline 2 and configured to filter foreign substances in seawater passing through the inflow-side pipeline 2. In addition, the apparatus is configured to eliminate differential pressure using back washing.

3 and 4 are state diagrams illustrating a detailed structure of a filter assembly of a ballast water filtration apparatus according to an embodiment of the present invention.

As shown, the ballast water filtration apparatus 1 according to the embodiment of the present invention largely includes a filter assembly 100, a circulation flow path 200, a washing water pump 300, and a differential pressure eliminating unit 400. 100, the circulation flow path 200, the washing water pump 300, and the differential pressure eliminating unit 400 are characterized by being unified with each other and configured as a module independent of other components of the ballast water treatment system.

That is, by providing the ballast water filtration treatment device 1 as an independent module that can be selectively applied to the ballast water treatment system, maintenance is easy, but not only a new ballast water treatment system, The filter can be easily applied to existing ships to which the conventional ballast water treatment system has been applied.Also, it is possible to perform filtration even during deballasting, which discharges ballast water outboard. The backwashing of the assembly 100 is also possible.

Next, this will be described in further detail.

First, the filter assembly 100 is a part that filters foreign matter in seawater flowing through the inflow-side pipeline 2.

The filter assembly 100 includes a housing 110, an untreated water inflow pipe 120, a treated water outflow pipe 130, a plurality of filter elements 140, and a washing water outflow pipe 150.

Here, the housing 110 is a part that forms the external appearance of the ballast water filtration treatment device 1, and is formed of a cylindrical body having an open upper surface and an internal space, and a partition plate 111 that partitions an upper and lower space inside. In this case, a plurality of passage holes 112 are formed in the partition plate 111 along the circumferential direction.

At the same time, as shown in FIGS. 5 to 7, a cover 113 is installed on the open upper surface of the housing 110 so that the filter element 140 can be replaced.

In particular, the cover 113 is fixed to a cover lift 118 for easy and convenient opening, and the cover lift 118 is coupled to an elevating shaft 114 which is supported by an elevating shaft guide 117 so as to be able to move up and down and rotate. After being fixed and separated from the upper surface of the housing 110 by the upward movement of the elevating shaft 114, the upper surface of the housing 110 can be completely opened by rotating the corresponding elevating shaft 114. At this time, the up and down movement of the up and down shaft 114 is configured to be performed by operating a hydraulic jack 115, which is as shown in FIGS.

That is, as shown in FIG. 8, considering that the conventional ballast water filtration apparatus generally has a structure in which the cover 113 is completely lifted and opened by the crane 10, the cover 113 is opened inside the ship. And a sufficient space for opening and taking out the cover 113 must be provided, so that the cover 113 can be opened and closed by the opening and closing structure shown in FIGS. The ballast water filtration apparatus according to the embodiment of the present invention has an advantage that the installation space thereof can be minimized, so that it can be installed on an existing ship.

In addition, as shown in FIGS. 2 to 4, the untreated water inflow pipe 120 is a pipe connected to the inflow side pipe line 2 that guides the flow of ballast water pumped by the ballast pump 5, It is provided on the peripheral surface on the bottom side of the housing 110.

Further, the treated water outflow pipe 130 is a pipe connected to the ballast water storage tank 3 or the outflow pipe 4 for guiding the water to be discharged outboard, and is a peripheral surface on the upper side of the housing 110. Be prepared for.

In addition, the filter element 140 is a filter that filters foreign matter from ballast water that flows in from the untreated water inflow pipe 120 and is discharged through the treated water outflow pipe 130. A plurality of such filter elements 140 are provided, the peripheral surface is formed in a structure in which a net or a yarn for filtration is wound up, and the bottom surface has an open cylindrical shape. The partition plate 111 is installed on the upper surface of the partition plate 111 in the housing 110 so as to communicate with the respective through holes 112 of the partition plate 111.

The washing water outflow pipe 150 is a pipe provided separately from the untreated water inflow pipe 120 and the treated water outflow pipe 130, and is provided on a peripheral surface on the bottom side of the housing 110. In particular, in the embodiment of the present invention, the washing water outflow pipe 150 flows from the upper space in the housing 110 through the filter elements 140 to the lower space in the housing 110 due to the back washing of the filter elements 140. This is characterized in that the pipe is a pipe for discharging cleaning water to the outside of the housing 110.

On the other hand, in the space on the bottom side of the housing 110 that forms the filter assembly 100, the washing water that has passed through the filter element 140 in the opposite direction is separated from the space on the bottom side of the housing 110 by the washing water. A discharge guide 160 for guiding the water to the water outlet pipe 150 is further provided.

The discharge guide 160 is a part configured to receive and discharge the cleaning water used for cleaning each of the filter elements 300. The discharge guide 160 is configured to detect the filtered water that has been confirmed by the pressure transmitters 116a and 116b. The cleaning water discharge pipe 161 is configured to operate when the pressure difference with the filtered water reaches a preset value, and the cleaning water discharge pipe 161 sequentially matches each of the passage holes 112 of the partition plate 111, and the cleaning water discharge pipe 161 passes therethrough. The cleaning water discharge pipe 161 includes a driving motor 163 for sequentially rotating and driving the cleaning water discharge pipe 161 when the holes 112 coincide with the holes 112.

In particular, in the case of the airtight member 162, as shown in FIGS. 9 to 11, the two or more passage holes 112 are formed in a streamlined size that can be closed at the same time, and as shown in FIG. While the washing water discharge pipe 161 is moving from one of the passage holes 112 to coincide with another passage hole 112, untreated water (non-wash water) is unintentionally introduced into the washing water discharge pipe 161. (See the state shown in FIG. 13), so that the backwashing efficiency can be maximized.

At this time, FIG. 9 shows a state in which the airtight member 162 and the passage hole 112 communicate with each other while the discharge guide 160 is rotating, and FIGS. 10 and 11 show a state in which the discharge guide 160 rotates and passes through the airtight member 162. It can be seen that this is the state when the communication with the hole 112 is not made, and the untreated water does not flow.

Next, as shown in FIG. 4, the circulation flow path 200 is filled with ballast water (hereinafter, referred to as “backwashing”) containing foreign matter discharged through the washing water outflow pipe 150. The flow path guides the untreated water inflow pipe 120 to flow again.

The circulation channel 200 has one end connected to the washing water outflow pipe 150 and the other end located inside the untreated water inflow pipe 120.

That is, the backwash water that has washed each filter element 140 of the filter assembly 100 through the structure of the circulation channel 200 described above can be treated again (foreign matter filtering) while passing through each filter element 140 in the filter assembly 100 again. I did it.

In the embodiment of the present invention, a part (hereinafter, referred to as a “flow path discharge side”) 201 of the circulation flow path 200 from which the backwash water is discharged is a part of the untreated water inflow pipe 120. It is installed so as to be inserted into the raw water inflow pipe 120 so as to penetrate therearound, and is bent or rounded in the flow direction of ballast water flowing along the raw water inflow pipe 120. In particular, as shown in FIG. 10, the pipe end portion 202 of the flow channel discharge side 201 is gradually expanded in the direction in which the ballast water is discharged, and the end is formed in a streamlined structure. As a result, the pressure loss is minimized, and the backwash water flowing along the circulation channel 200 into the untreated water inflow pipe 120 is discharged more smoothly by the eject principle. Door is preferable.

That is, the structure of the flow passage discharge side 201 of the circulation flow passage 200 as described above causes the discharge pressure in the circulation flow passage 200 by the flow pressure (negative pressure) of the ballast water flowing along the untreated water inflow pipe 120. The discharge flow rate of the backwash water discharged through the side can be further increased.

In particular, a streamlined velocity accelerating blade 203 is built in the end of the circulation channel 200 on the side where the backwash water is discharged, and a large number of contact fins 204 are provided on the surface of the velocity accelerating blade 203. Is protruded. Such a structure is applied to the contact fins 204 of the flow velocity accelerating blade 203 when microorganisms that have not been removed or crushed yet flow back into the housing 110 into the backwash water that has passed through the differential pressure eliminating unit. After receiving the primary impact, pressure fluctuations are induced by acceleration and deceleration of the flow velocity by the shape of the flow velocity accelerating blade 203 and the shape of the tube end portion 202, so that the microbial cell membrane can be broken by the impact. .

At the same time, the circulation channel 200 is further provided with an outboard discharge pipe 210 for discharging backwash water outboard, and the circulation channel 200 has a first opening / closing channel for opening / closing a corresponding channel. The opening / closing valve 220a is further provided, and the outboard discharge pipe 210 is further provided with a second opening / closing valve 220b for opening and closing the corresponding pipeline. That is, when the ballast water stored in the storage tank 3 and the ballast water flowing in from outside the ship are seawater in the same area, the backwash water does not circulate through the circulation flow path 200 and the ship does not circulate immediately. Considering that the water may be discharged to the outside, the backwash water discharged through the cleansing water outlet pipe 150 of the filter assembly 100 is again controlled by the operation control of the two on-off valves 220a and 220b. Instead of re-supplying the water inside, the water is immediately discharged out of the boat, so that the load on the ballast water pump 5 can be reduced by the filtering operation of the corresponding filter assembly 100.

Next, the washing water pump 300 is a pump that pumps the backwash water to be discharged through the washing water outflow pipe 150.

While the washing water pump 300 is installed at a connection portion between the washing water outflow pipe 150 and the circulation flow path 200, the backwash water discharged through the washing water outflow pipe 150 is discharged outboard. Or forcedly circulated along the circulation channel 200.

Next, the differential pressure eliminating unit 400 is a part provided to reduce a load applied to each filter element 140 of the filter assembly 100 by the backwash water. The washing water pump 300 is provided on the backwash water discharge side.

That is, the differential pressure eliminating unit 400 further receives various filter elements 140 and the ballast water pump 5 of the filter assembly 100 by filtering or pulverizing various foreign substances in the backwash water flowing along the circulation flow path 200. This is to reduce the load.

For reference, the differential pressure eliminating unit 400 is driven only during deballasting, and deballasting means discharging the ballast water in the ballast water storage tank 3 outboard. The ballast water in the ballast water storage tank is filtered and stored at the time of primary ballasting, so that it is clean ballast water. Therefore, the differential pressure eliminating unit 400 may collect or pulverize organisms additionally generated in the storage tank 3 or grown in the storage tank.

In the embodiment of the present invention, the differential pressure canceling unit 400 has a multi-cyclone dust collection type structure as an example. For this reason, the differential pressure canceling unit 400 according to the embodiment of the present invention is configured as shown in FIG. As shown in the figure, a cyclone body 451 which is narrower toward the bottom and has a lower end opened to discharge foreign matter, a plurality of auxiliary cyclones 457 installed in the cyclone body 451, and each of the auxiliary cyclones An inflow pipe 452 for guiding backwash water to flow into the inside of each of the auxiliary cyclones 457 around an upper end of the auxiliary cyclone 457, and an inflow pipe 452 penetrating around an upper portion of the cyclone body 451, and An outflow pipe 453 for guiding the backwash water from which the foreign matter has been separated through the cyclone 457 and a space provided on the bottom side in the cyclone body 451. And a scattering prevention plate 458 and a plurality of guide vanes 455 sequentially provided while forming a shade structure to prevent re-scattering of foreign matter separated from the auxiliary cyclones 457, and a plurality of guide blades 455 provided below the cyclone body 451. And a discharge valve 459 for selectively discharging foreign matter.

That is, the backwash water that has flowed in through the inflow pipe 452 passes through the plurality of auxiliary cyclones 457 provided in the cyclone body 451 so that foreign matter is separated, and then penetrates around the upper portion of the cyclone body 451. The foreign matter flowing out through the outflow pipe 453 configured as described above and separated from the backwash water by the auxiliary cyclones 457 falls into the bottom space in the cyclone body 451 and is stored.

At this time, the scattering prevention plate 458 and the guide blade 455 sequentially provided in the bottom space in the cyclone body 451 prevent the foreign matter separated from each of the auxiliary cyclones 457 from re-scattering, and the lower side of the cyclone body 451 can be prevented. Is provided with a discharge valve 459 for selectively discharging foreign matter stored in a foreign matter storage cylinder 454 which is a bottom space in the cyclone body 451.

Hereinafter, the operation of the above-described ballast water filtration apparatus according to the embodiment of the present invention will be described more specifically.

First, when a ballasting operation for filling the ballast water in the storage tank 3 of the ship is performed in the initial state as shown in FIG. 2, the ballast water pump 5 is driven and the operation control of various valves is performed. After pumping out the seawater outside of the ship and passing it sequentially through the ballast water filtration device 1 and the post-processing equipment 7, it is stored in the storage tank 3.

In this process, various foreign substances and microorganisms contained in the seawater are firstly filtered while passing through the ballast water filtration treatment device 1 and then sterilized while passing through the post-processing equipment 7 in the storage tank. Stored in 3 This is as shown in FIGS.

On the other hand, various foreign substances are accumulated on the surface of each filter element 140 of the filter assembly 100 constituting the ballast water filtration apparatus 1 during the course of performing the above-mentioned process, thereby preventing the flow of seawater passing through each filter element 140. As a result, a differential pressure is generated.

In this case, the pressure transmitters 116a and 116b installed above and below the housing 110 confirm the differential pressure. If the differential pressure thus determined does not reach the preset maximum differential pressure, the pressure If the differential pressure reaches a preset maximum differential pressure, the washing water pump 300 is additionally operated and the opening and closing control of the on-off valve 220b is performed. Backwashing is performed on each of the filter elements 140 until the differential pressure confirmed by the transmitters 116a and 116b becomes lower than a preset minimum differential pressure.

That is, due to the additional operation of the washing water pump 300, the filtered seawater existing in the upper space in the housing 110 forming the filter assembly 100 is filtered out of each filter element 140 so as to communicate with the discharge guide 160. While passing through the element 140 in the reverse direction, it passes through the discharge guide 160 and is discharged through the washing water outflow pipe 150. In this process, foreign substances accumulated on the surface of the corresponding filter element 140 are removed, so that the differential pressure is reduced. Is eliminated. This is as shown in FIGS.

In particular, the washing water discharge pipe 161 forming the discharge guide part 160 in the above-described process is rotated by the driving of the drive motor 163 to sequentially move from any one of the through holes 112 to another through hole 112 on its side. Meanwhile, all the filter elements 140 installed in the respective through holes 112 are backwashed. In this process, there is a possibility that the washing water discharge pipe 161 may be partially connected to the two through holes 112 at the same time. Some unintentional discharge of non-wash water may occur. However, since the airtight member 162 provided in the washing water discharge pipe 161 is formed in a streamlined shape having a size capable of closing two or more passage holes 112 at the same time, the washing water discharge pipe 161 does not pass through any of the passages. It is possible to prevent unintentional discharge of the non-cleaning water to the above-mentioned cleaning water discharge pipe 161 while moving to another passage hole 112 in a state where the cleaning water coincides with the hole 112. This is as shown in FIGS.

Further, at the time of deballasting, since the ballast water is stored in the storage tank 3 in another sea area, the backwash water discharged through the flush water outflow pipe 150 cannot be discharged outboard. The ballast water flows along the circulation channel 200 connected to the washing water outflow pipe 150, and during ballasting, the ballast water out of the boat is stored in the storage tank 3, and the washing water outflow pipe 150 is removed. The backwash water discharged through is discharged outboard via the outboard discharge pipe 210. Since the backwash water discharged in this manner is ballast water in the same sea area, it can satisfy the discharge standard of the IMOD2 regulation by outboard discharge.

When the differential pressure drops below a preset minimum differential pressure due to the sequential cleaning of each filter element 140 in the above-described process, the operation of the cleaning water pump 300 is interrupted and the ballast as shown in FIGS. Only the work of storing seawater outside the boat in the storage tank 3 by the operation of the water pump 5 is continuously performed.

On the other hand, when the voyage is completed after the ship moves to another sea area, a deballasting operation of discharging the ballast water stored in the storage tank 3 outboard is performed.

In such a deballasting operation, the ballast water in the storage tank 3 is seawater in a sea area different from the sea area outside the vessel, so that the ballast water is supplied through the guide pipe 6 to the inflow side pipe 2. The operation control of various valves and the ballast water pump 5 is performed so that the ballast water is sequentially discharged through the ballast water filtration processing device 1 and the post-treatment equipment 7 and then outboard through the outboard discharge passage 210. Done.

That is, at the time of deballasting (ballast water overboard discharge), the ballast water in the storage tank 3 is sterilized while passing through the post-processing facility 7, and can be discharged via the outboard discharge channel 4a. In addition, the ballast water is allowed to flow into the post-processing equipment 7 after passing through the ballast water filtration treatment apparatus 1, so that the performance degradation of the post-processing equipment 7 is caused by foreign matters remaining in the ballast water. Can be minimized. This is as shown in FIG.

In particular, when the differential pressure confirmed by the pressure transmitters 116a and 116b installed above and below the housing 110 during the above deballasting operation exceeds a preset maximum differential pressure, the washing water pump 300 Is additionally operated, and the back washing of each filter element 140 is performed until the differential pressure confirmed by the pressure transmitters 116a and 116b becomes lower than a preset minimum differential pressure while opening and closing control of the opening and closing valve 220a is performed. I do.

That is, due to the additional operation of the washing water pump 300, the filtered seawater existing in the upper space in the housing 110 forming the filter assembly 100 is discharged through the rotating washing water discharge pipe 161 of each filter element 140. After passing through the filter element 140 which is positioned to communicate with the guide part 160, the filter element 140 is discharged from the washing water outflow pipe 150 through the discharge guide part 160, and in this process, foreign matter accumulated on the surface of the filter element 140 is removed. This eliminates the differential pressure. This is as shown in FIG.

At the same time, the backwash water that has washed the corresponding filter element 140 during the cleaning operation of each filter element 140 of the ballast water filtration apparatus 1 has a multi-cyclone dust collecting structure along the circulation flow path 200. The foreign matter contained in the backwash water is first removed after passing through the pressure relief unit 400, and then flows back into the housing 110 through the untreated water inflow pipe 120. Accordingly, the generation of the differential pressure due to the foreign matter is prevented at the maximum, and the performance deterioration phenomenon of the post-processing equipment 7 due to the foreign matter is also prevented at the maximum.

In addition, the channel discharge side 201 of the circulation flow channel 200 through which the backwash water is discharged passes through the peripheral surface of the untreated water inflow pipe 120 and then flows into the untreated water inflow pipe 120. Is formed by being bent (or rounded) so as to face the same direction as the flow direction of the water, and the pipe end portion 202 of the circulation flow channel 200 is gradually expanded in the direction of discharging the backwash water. The ballast water flowing into the untreated water inflow pipe 120 induces the effect of drawing backwash water passing through the circulation flow path 200, so that the backwash water is discharged more smoothly. Since the discharge flow rate for the backwash water can be further increased, the improvement of the cleaning performance for each filter element 140 can be realized.

After all, the ballast water filtration apparatus 1 of the present invention as described above is provided as a single independent module, so that it can be easily applied not only to a new ballast water treatment system but also to a conventional ballast water treatment system. It is possible.

In particular, since only the modularized ballast water filtration treatment apparatus 1 can be separated from the ballast water treatment system, maintenance of the filter assembly 100 can be easily performed.

At the same time, the ballast water filtration apparatus 1 of the present invention can perform a cleaning operation on each filter element 140 even at the time of deballasting for discharging ballast water outboard, so that the surface clogging of each filter element 140 can be performed. And the damage to the post-processing equipment 7 due to the pressure difference.

On the other hand, the differential pressure eliminating unit 400 that constitutes the ballast water filtration device 1 of the present invention is not limited to being formed only by the cyclone dust collection type structure similar to the above-described embodiment.

For example, as shown in FIG. 22, the differential pressure eliminating unit 400 may be formed by a mixed structure of a cyclone dust collection system and a filtration system, and as shown in FIG. The pressure difference eliminating part 400 can be formed only by the structure, and as shown in FIGS. 24 to 26, a structure of a crushing method of crushing foreign matter is used instead of a method of separating and collecting foreign matter using a cyclone. The differential pressure eliminating section 400 can be formed.

Here, the differential pressure eliminating unit 400 shown in FIG. 22 is provided with a plurality of filtration nets 416, and the backwash water flowing through the inflow pipe 412 in the cyclone body 411 and flowing out through the outflow pipe 413 is provided. It is a structure configured to pass through each of the filtration networks 416. At this time, the cyclone body 411 is formed in a conical structure in which the cyclone body 411 gradually contracts toward the bottom, and a foreign matter storage cylinder 414 is provided at an end of the bottom of the cyclone body 411. A guide blade 415 having a zigzag structure is further formed on the inner peripheral surface of 414 so as to prevent foreign matters stored in the foreign matter storage cylinder 414 from being provided to the inside of the cyclone body 411 again. Be composed.

Further, the differential pressure eliminating part 400 shown in FIG. 23 is narrower toward the bottom and communicates with the cyclone body 411 whose lower end is opened so that foreign matter is discharged, and the peripheral surface of the cyclone body 411. And an inflow pipe 412 connected to the backwash inflow side of the circulation channel 200 and an inflow side of the backwash water of the circulation channel 200 installed in communication with an upper surface of the cyclone body 411. The cyclone body 411 is provided with a foreign substance storage cylinder 414 at the bottom end thereof, and a guide blade having a zigzag structure is provided on the inner peripheral surface of the foreign substance storage cylinder 414. The additional formation of 415 prevents foreign matter stored in foreign matter storage cylinder 414 from being provided to cyclone body 411 again. It is. At the same time, a filtering net 416 is further provided at the end of the outflow pipe 413 located in the cyclone body 411 so that foreign substances in the ballast water flowing out through the outflow pipe 413 can be filtered again. To

24 is provided so as to communicate with the empty cylindrical body 421 and the bottom surface of the body 421, and is provided on the ballast water inflow side of the circulation flow path 200. An outlet pipe 423 connected to a peripheral surface of the body 421 and connected to a ballast water outlet side of the circulation flow path 200; and an outlet pipe 423 in the body 421. A rotary cylinder 425, which is installed so as to block and has a large number of through holes formed in the peripheral surface and is configured to rotate by driving a rotary motor 424, the rotary cylinder 425 and the outflow pipe 423. And a perforated pipe 426 having a large number of through-holes formed in the peripheral surface thereof. Foreign matter is crushed and fine Than it was to be able to.

The differential pressure eliminating section 400 shown in FIG. 25 is installed so as to communicate with the hollow cylindrical body 431 inside and the bottom surface of the body 431, and is provided on the ballast water inflow side of the circulation flow path 200. An inflow pipe 432 connected to the peripheral surface of the body 431 is connected to an outflow pipe 433 connected to a ballast water outflow side of the circulation flow path 200, and an inflow pipe 432 is inserted into the body 431. A partition plate 435 having a large number of through-holes on its surface and a space connected to the inflow pipe 432 in the body 431 are located so as to block the space in which the communication and the outflow pipe 433 communicate with each other. And a rotary brush 436 for crushing ballast water flowing through the partition plate 435 and flowing out of the outflow pipe 433 while being rotated by the drive of the rotary motor 434. This structure is the foreign matter in backwash water passing through the differential pressure releasing section 400 is to be miniaturized is crushed.

At this time, the partition plate 435 may be formed as a flat plate, but is oriented in the flow direction of the backwash water to enlarge the water passage area and to uniformly flow the backwash water to all parts in the body 431. In this case, the outer surface is gradually inclined outward.

26 is provided so as to communicate with a cylindrical body 441 having an empty inside and one side of the peripheral surface of the body 441. An inflow pipe 442 connected to the ballast water inflow side, an outflow pipe 443 installed to communicate with the other side of the peripheral surface of the body 441, and connected to the ballast water outflow side of the circulation flow path 200; The body 441 is installed so as to block the side to which the inflow pipe 442 communicates and the side to which the outflow pipe 443 is connected. And a semicircle for additionally crushing microorganisms and foreign matter, which is positioned so as to block between the outflow pipe 443 and the crushing blade 445, and a porous crushing blade 445 for crushing ballast water flowing out of the crusher. Comprising Jo of the striking hole grinding plate 446. With this structure, while the backwash water passing through the corresponding pressure release unit 400 flows more smoothly, living organisms can be killed and crushed by the method of crushing foreign matter in the backwash water. The organisms pulverized as described above are further pulverized and discharged by collision in the process of passing through the perforated perforated pulverizing plate 446.

Thus, the ballast water filtration apparatus of the present invention is a useful invention that can be implemented in various ways.

DESCRIPTION OF SYMBOLS 1 Ballast water filtration apparatus 2 Inflow side line 3 Ballast water storage tank 4 Outflow side line 4a Outboard discharge passage 4b Storage tank injection passage 5 Ballast water pump 6 Guide line 7 Post-processing equipment 8 Pipe 9 Sea chest Reference Signs List 100 Filter assembly 110 Housing 111 Partition plate 112 Passage hole 113 Cover 114 Elevating shaft 115 Jack 116a, 116b Pressure transmitter 117 Elevating shaft guide 118 Cover lift 120 Untreated water inflow pipe 130 Treated water outflow pipe 140 Filter element 150 Wash water outflow pipe 160 Discharge guide part 161 Cleaning water discharge pipe 162 Airtight member 163 Drive motor 200 Circulation flow path 201 Flow path discharge side 202 Terminal part 203 Flow velocity accelerating blade 204 Contact fin 210 Outboard discharge flow path 220a, 220b Open / close valve 300 Washing Water purification pump 400 Differential pressure eliminating parts 411, 421, 431, 441, 451 Body 412, 422, 432, 442, 452 Inflow pipes 413, 423, 433, 443, 453 Outflow pipes 414, 454 Foreign matter storage cylinder 415 Guide vane 416 Filtration Nets 424, 434, 444 Rotary motor 425 Rotating cylinder 426 Perforated pipe 435 Partition plate 436 Rotating brush 445 Pulverizing blade 446 Punching hole pulverizing plate 455 Guide vane 457 Auxiliary cyclone 458 Shatter prevention plate 459 Discharge valve

Claims (7)

A ballast water filtration treatment device including a filter assembly, a circulation channel, a washing water pump, and a differential pressure eliminating unit,
The filter assembly includes a housing, an untreated water inflow pipe, a treated water outflow pipe, a plurality of filter elements, a wash water outflow pipe, and a discharge guide,
The housing is formed of a cylindrical body having an open upper surface and having an internal space, and a partition plate for partitioning an upper space and a lower space is provided inside, and the partition plate is provided with a plurality of passage holes. And
The untreated water inflow pipe is disposed on a bottom side of the housing, and is connected to an inflow side pipe that guides a flow of ballast water pumped by a ballast pump ,
The treated water outflow pipe is provided on an upper side of the housing, and is connected to an inflow pipe of a post-treatment facility that kills microorganisms contained in the ballast water filtered by the plurality of filter elements ,
The plurality of filter elements have a cylindrical shape in which an upper surface is closed and a bottom surface is opened, and are arranged on the upper surface of the partition plate so as to communicate with respective passage holes of the partition plate, respectively, and the untreated water is provided. Filter foreign matter from the ballast water flowing from the inflow pipe ,
The washing water outflow pipe is provided at a lower side of the housing, and when the plurality of filter elements are back-washed, the plurality of filter elements pass through the plurality of filter elements in a reverse direction from an upper space in the housing and are provided in the housing. Draining the backwash water flowing to the lower space outside the housing,
The discharge guide section is disposed below the partition plate in the lower space of the housing, and the wash water discharge pipe sequentially matches each passage hole of the partition plate, and the wash water discharge pipe matches the passage hole. An airtight member that shuts off the gap when the cleaning element is removed, and a drive motor for moving the cleaning water discharge pipe, and the backwash water that has passed in the reverse direction through the filter element passes through the cleaning drainpipe, and the housing Guided to flow to the washing water outflow pipe in a partitioned state with the lower space inside,
The airtight member is in close contact with the lower surface of the partition plate, is formed in a streamlined shape having a size capable of simultaneously closing two or more of the passage holes, and the cleaning water discharge pipe is connected to any one of the passage holes. Configured to prevent untreated ballast water from being drained through the wash water drain before the match.
The washing water discharge pipe comprises a pipe through which backwash water that has washed the plurality of filter elements is discharged,
The circulation flow path, the washing water outlet pipe and which is connected with the untreated water inlet in the pipe, the raw water backwash water discharged through the wash water discharge pipe of the filter assembly the filter assembly a guide for the pipe to re-flow into the inlet pipe, wherein the circulation flow path, said from the washing discharge pipe overboard by overboard discharge passage is a conduit for discharging is provided backwash water A first on-off valve for opening and closing a pipe line from the washing water outflow pipe to the untreated water inflow pipe, and a second on-off valve for opening and closing a pipe line from the washing water outflow pipe to the outside of the ship,
The washing water pump, wherein the washing water discharge pipe is provided at a connection portion between the circulation flow passage, and discharged by pumping the backwash water through the wash water discharge pipe,
The differential pressure eliminating section is provided in a pipe line from the washing water outflow pipe to the untreated water inflow pipe among the pipe lines of the circulation flow path, and a backwash flowing along the circulation flow path. Filter or crush foreign matter in the water,
Ballast water pumped by the ballast pump flows in from the untreated water inflow pipe, passes through the plurality of filter elements, foreign substances are filtered, and is discharged through the treated water outflow pipe,
When performing backwashing of the plurality of filter elements using ballast water passing through the untreated water inflow pipe, the washing water pump is operated to close the first opening / closing valve, and the second opening / closing valve is closed. When opened, the backwash water that has backwashed the plurality of filter elements is discharged out of the washwater outflow pipe through the outboard discharge flow path, and the first open / close operation is performed by operating the washwater pump. When the valve is opened and the second on-off valve is closed, the backwash water obtained by backwashing the plurality of filter elements is discharged from the washwater outflow pipe into the untreated water inflow pipe through the circulation flow path. A ballast water filtration treatment device characterized by the above-mentioned. The side where the backwash water of the circulation channel is discharged is installed so as to be inserted into the untreated water inflow pipe through the periphery of the untreated water inflow pipe,
The end of the circulation flow path on the side where the backwash water is discharged is formed so as to be bent or rounded in the flow direction of the ballast water flowing along the untreated water inflow pipe. The end is formed in a streamlined structure while being formed so as to be gradually expanded,
A streamlined flow velocity accelerating blade is built in the inside of the end of the circulation flow path where the backwash water is discharged, and a number of contact fins are protruded from the surface of the flow velocity accelerating blade. The ballast water filtration device according to claim 1, characterized in that: The differential pressure eliminating unit is
A cyclone body that becomes narrower as it goes to the bottom and is open at the lower end so that foreign matter is discharged,
A plurality of auxiliary cyclones installed in the cyclone body,
An inflow pipe for guiding backwash water to flow into the inside of each of the auxiliary cyclones through around the upper end of each of the auxiliary cyclones;
An outflow pipe installed to penetrate around the upper part of the cyclone body, and guiding outflow of backwash water in which foreign matters are separated through the auxiliary cyclones;
A scattering prevention plate and a plurality of guide vanes provided in a space on the bottom side in the cyclone body and sequentially provided in a shade structure to prevent re-scattering of foreign matter separated from each of the auxiliary cyclones,
2. The ballast water filtration device according to claim 1, further comprising a discharge valve provided below the cyclone body and configured to selectively discharge foreign substances. 3. The differential pressure eliminating unit is
An empty cylindrical body inside,
An inflow pipe installed to communicate with the bottom surface of the body and connected to a ballast water inflow side of the circulation flow path;
An outlet pipe that is installed to communicate with the peripheral surface of the body and that is connected to a ballast water outlet side of the circulation flow path;
A rotary cylinder, which is installed so as to block the outflow pipe in the body, is provided with a large number of through holes in the peripheral surface, and is configured to rotate by driving a rotary motor,
The perforated pipe, which is fixedly installed so as to block between the rotary cylinder and the outflow pipe, and includes a perforated pipe having a large number of through holes formed in a peripheral surface thereof. Ballast water filtration equipment. The differential pressure eliminating unit is
An empty cylindrical body inside,
An inflow pipe installed to communicate with the bottom surface of the body and connected to a ballast water inflow side of the circulation flow path;
An outlet pipe that is installed to communicate with the peripheral surface of the body and that is connected to a ballast water outlet side of the circulation flow path;
In the body, while being installed so as to block the space in which the inflow pipe communicates and the space in which the outflow pipe communicates, a large number of through-holes are formed in the surface, and the more outwardly the ballast water flows in the ballast water direction. A partition plate formed to tilt,
A rotating brush for crushing ballast water flowing through the partition plate and flowing out through the outflow pipe, while being rotated by a rotation motor while being positioned on the space side where the inflow pipe in the body communicates. The ballast water filtration device according to claim 1, wherein: The differential pressure eliminating unit is
An empty cylindrical body inside,
An inflow pipe installed to communicate with one side of the peripheral surface of the body and connected to a ballast water inflow side of the circulation flow path;
An outflow pipe installed to communicate with the other side of the peripheral surface of the body, and connected to a ballast water outflow side of the circulation flow path;
Ballast water that is installed in the body so as to block the side where the inflow pipe communicates and the side where the outflow pipe communicates, and rotates from being driven by the rotary motor while flowing in from the inflow pipe and flowing out through the outflow pipe. A porous grinding blade for grinding
The semi-cylindrical perforated crushing plate, which is positioned so as to block between the outflow pipe and the crushing blade and additionally crushes microorganisms and foreign matter, is characterized in that it comprises: Ballast water filtration equipment. The open upper surface of the housing is provided with a cover, and the cover is fixed to a cover lift, and the cover lift is supported by an elevating shaft guide and is coupled to an elevating shaft rotatably and rotatably installed. After being fixed and separated from the upper surface of the housing by the upward movement of the elevating shaft, the upper surface of the housing can be completely opened by rotating the corresponding elevating shaft, and the elevating movement of the elevating shaft is performed by a hydraulic jack. The ballast water filtration device according to claim 1, wherein the ballast water filtration device is performed by an operation.