KR20210079513A - Double Filter of Water Treatment for Ship - Google Patents

Abstract

Provided is a double filter of water treatment for a ship, which includes: an upper casing having an oil sensor, an oil drain valve, a bilge suction valve, and a pressure sensor; a primary filter support coupled between the upper casing and the lower casing to fix a primary filter; a lower casing having a filtered water discharge valve and a pressure sensor; and first and second filters, so as to lower the oil content to 5 ppm by adding a double filter for ship water treatment to a rear end of the existing system while minimizing additional devices and modifications to the system that lowers the oil content of the existing bilge water to 15 ppm. In addition, sludge or concentrated oil attached to the primary filter is removable through back flushing of the double filter for ship water treatment, to increase the service life of the filter, thereby reducing maintenance costs.

Description

Double Filter of Water Treatment for Ship

The present invention relates to a double filter for ship water treatment, and more particularly, to a double filter for ship water treatment that lowers a bilge index having an oil content of 15 ppm in water to 5 ppm through a primary filter and a secondary filter.

Bilge water is water that has accumulated at the bottom of a ship, technically, it is a mixture of various substances, not water, and it is mixed water caused by leakage from pipes/valves, various devices and equipment, and overflow from various tanks.

The international community is strengthening the structural and technical conditions and emission standards that ships must comply with in order to prevent indiscriminate leakage of oil and other pollutants into the sea that destroys the marine ecosystem and causes serious damage to the marine and fishery-related industries. In 1992, at the 33rd meeting of the International Maritime Organization (IMO) Marine Environment Protection Committee (MEPC), resolution MEPC.60 (33) was adopted, which includes guidelines and standards for anti-pollution equipment for bilges in machinery spaces of ships. and in 2003, recognizing the development of technology since 1992, the Committee adopted Resolution MEPC.107 (49) containing the guidelines and standards adopted in 1992.

In accordance with MEPC.107 (49), bilge separators are required to discharge oil content not exceeding 15 ppm, to record data, time, oil content and operating status, and to store information for 18 months.

Among the pollutants generated by ships, the representative bilge wastewater is formed by gathering all wastewater from the engine room and cargo hold bottom. Bilge Separators are installed in all ships to treat and discharge the bilge wastewater. Due to the insufficient operational capability of the crew, they are not properly treated and are discharged overboard.

The oil emulsion contained in bilge wastewater exists in a fairly stable state, and there are chemical emulsions formed by mixing with surfactants or emulsifiers and mechanical emulsions generated in various machinery. In the case of chemical emulsions, no special treatment is required. Otherwise, it will remain in a stable state for a very long time. Mechanical emulsions are also very stable, emulsions in the form of slightly larger particles than chemical emulsions. As the ship-based pollutant emission standards are tightened, additional facilities are needed in addition to the existing bilge separator for the treatment of the emulsion that is stabilizing in the bilge water generated in the ship. It is stabilized by adding a new technology to the existing 15ppm bilge separator technology. Efforts are being made to develop a 5ppm Bilge Separator product to process the emulsion and to prepare for the further strengthening of regulations.

Korean Patent Registration No. 10-1662039 discloses that the existing oil-water separator is piped so that the bilge water of Bilge Well/ Bilge Holding Tank/ Oily Bilge Tank can be purified and treated, but usually the bilge of the Bilge Holding Tank is purified and processed to outboard It had a system for evacuation.

However, the existing static type oil-water separator has a limitation in purifying and processing contaminated bilge water containing a large amount of oil and oil residues, so it was difficult to purify it to a level of less than 5 ppm, and oil and residues ( Because the contaminated bilge water containing a large amount of oil residues flows through the stationary oil-water separator and is separated by gravity and filtering, a large amount of oil and residues contaminate the inner wall and filter of the oil-water separator, requiring opening, cleaning, and filter replacement. There was trouble. For this reason, the conventional stationary oil-water separator had difficulty in removing the oil content of the purified water to 5 ppm or less, and to solve the above problem, a centrifugal separation system including a centrifuge was installed as a bilge water purification treatment system. Therefore, in order to provide a bilge water purification treatment method that prevents marine pollution by reliably purifying and treating bilge water contaminated with oil in a simple and inexpensive way, it relates to a bilge water purification treatment method using a centrifugal separation system. 10), the three-way valve 1 (20), the centrifuge 30, and the sludge tank 40 are sequentially connected to filter the bilge water introduced from the filter 10, and the filtered bilge water is separated by a centrifuge. After centrifugation by (30), clean bilge water is discharged to a stationary oil-water separator or clean bilge tank, refined oil is discharged to a fuel oil setting tank, and high specific gravity oil residues and sludge are discharged to a sludge tank. As a bilge water purification treatment system, the present invention additionally installs a centrifugal separation system including a centrifugal separator in a stationary oil-water separator system to reliably purify the bilge water contaminated with oil in a ship in a simple and inexpensive way. By doing so, it has a remarkable effect in preventing marine pollution.

However, the above method has disadvantages in that the system is complicated, the initial investment capital is large, and it is difficult to use the existing equipment provided in the existing ship, and it is difficult.

Republic of Korea Patent No. 10-1662039

In order to solve the above problems, it is intended to provide a double filter for ship water treatment that can minimize additional devices and modifications to the existing system that lowers the oil content of the bilge to 15 ppm.

By adding a double filter for marine water treatment to the rear end of the existing system, the oil content can be lowered to 5ppm, which is inexpensive, prevents environmental pollution, and at the same time minimizes changes to the existing system and can be easily installed. We want to provide a filter.

Equipped with an upper casing having an oil sensor, an oil drain valve, a bilge water intake valve and a pressure sensor, a primary filter support that is coupled between the upper casing and the lower casing to fix the primary filter, a filtered water discharge valve and a pressure sensor To provide a double filter for marine water treatment, characterized in that it includes a lower casing and a primary filter, a secondary filter.

Here, the bilge water suction valve may be formed to be spaced apart from the center to form a circular flow along the inner circumferential surface of the upper casing.

In addition, the upper casing may further include a guide plate that prevents the bilge water from directly contacting the primary filter.

In addition, the secondary filter may increase the filtration efficiency by flowing the bilge water only to the lower portion.

In addition, the lower casing may further include a flushing water suction valve for back flushing of the primary filter.

According to an embodiment of the present invention, it is possible to reduce the oil content to 5 ppm by adding a double filter for ship water treatment to the rear end of the existing system while minimizing additional devices and modifications to the system for lowering the oil content of the bilge water to 15 ppm. It is economical as changes to the existing system can be minimized.

In addition, regardless of the filtration method of the existing system, the oil-water separator method or filter, it is possible to filter up to 5ppm level by adding a double filter for ship water treatment at the end of the existing filtration system.

In addition, it is possible to remove the sludge or concentrated oil attached to the primary filter through back flushing of the double filter for ship water treatment, thereby increasing the service life of the filter and reducing maintenance costs.

1 is an exploded view of a double filter for ship water treatment according to a preferred embodiment of the present disclosure;
2 is a cross-sectional view of a double filter for ship water treatment according to a preferred embodiment of the present disclosure
3 is a side view of a double filter for ship water treatment according to a preferred embodiment of the present disclosure;
4a and 4b are photos for explaining the primary filter of the double filter for ship water treatment according to a preferred embodiment of the present disclosure;
5a, 5b and 5c are photographs for explaining the secondary filter of the double filter for water treatment of a ship according to a preferred embodiment of the present disclosure;
6 is a view showing the flow of bilge water through the upper surface of the secondary filter for explaining the double filter for ship water treatment according to a preferred embodiment of the present disclosure;
7 is a view showing the flow of bilge water through the lower surface of the secondary filter and provided with a primary filter guide plate for explaining a double filter for ship water treatment according to a preferred embodiment of the present disclosure;
8 is a view for explaining the oil draining and backflushing process of the double filter for ship water treatment according to a preferred embodiment of the present disclosure;

Prior to the detailed description of each construction step of the present invention, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventors should develop their own inventions in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of a term can be appropriately defined in order to explain it as Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

When a part "includes" a certain element throughout the specification, this means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software. .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements. In describing the present invention, detailed descriptions of related known functions or configurations are omitted so as not to obscure the gist of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

1 is an exploded view of a double filter for ship water treatment according to a preferred embodiment of the present disclosure, FIG. 2 is a cross-sectional view of a double filter for ship water treatment according to a preferred embodiment of the present disclosure, and FIG. 3 is a preferred embodiment of the present disclosure It is a side view of a double filter for ship water treatment according to the present disclosure, and FIGS. 4A and 4B are photographs for explaining the primary filter of the double filter for ship water treatment according to a preferred embodiment of the present disclosure, and FIGS. 5A, 5B and 5C are this view It is a photograph for explaining the secondary filter of the double filter for ship water treatment according to a preferred embodiment of the disclosure, and FIG. 6 is a bill through the upper surface of the second filter for explaining the double filter for ship water treatment according to a preferred embodiment of the present disclosure It is a view showing the water flow, and FIG. 7 is a view showing the flow of bilge water through the lower surface of the secondary filter and provided with the primary filter guide plate for explaining the double filter for ship water treatment according to a preferred embodiment of the present disclosure. , FIG. 8 is a view for explaining an oil drain and backflushing process of a double filter for ship water treatment according to a preferred embodiment of the present disclosure.

The purpose of the present invention is to prevent marine pollution by finally lowering the oil content to 5 ppm or less and discharging it by connecting a double filter for ship water treatment to the end of the existing system for lowering the oil content to 15 ppm or less.

1 to 3, the double filter for ship water treatment (1) has an upper case 110, a lower case 140, a primary filter 120, a primary filter support 130 and a secondary filter ( 150).

The filter case 100 of the double filter 1 for marine water treatment has an overall cylindrical shape and has a case support 200 at the lower part. In addition, the filter case 100 can be divided into an upper case 110 and a lower case 140, and the upper case 110 and the lower case 140 are coupled in a flange type, and the same flange surface between the flange coupling parts. The primary filter support 130 with the interposed between the bolting from the top and bottom.

The primary filter support 130 is positioned between the upper case 110 and the lower case 140 to distinguish the primary filter unit from the secondary filter unit and serves to support the primary filter 120 at the same time.

The upper case 110 is provided with an oil sensor 111 and an oil drain valve 112 at the upper end, and includes a pressure sensor 114 and a bilge water intake valve 113 on a cylindrical side surface.

The pipe to which the bilge water intake valve 113 and the upper case 110 are connected may be formed toward the center of the cylindrical shape of the upper case 110, but is not limited thereto. When the connecting pipe of the bilge water intake valve 113 is formed at the center of the cylindrical shape of the upper case 110, the incoming bilge number does not form a special flow, but when it is formed outside the cylindrical shape, the incoming bil number is cylindrical It is introduced while having a circular flow along the inner circumferential surface of the bed so that it can pass through the primary filter 120 evenly as a whole.

In addition to this, the upper case 110 may further include a guide plate 124 .

Referring to FIG. 7 , the guide plate 124 has a structure like a cylindrical pipe with an outer diameter smaller than that of the upper case 110 inside the upper case 110, and has a structure such as a cylindrical pipe with a primary filter 110 inside the cylinder. It is provided in a structure surrounding the.

Through this, the bilge water flowing in through the bilge water intake valve 113 is prevented from directly colliding with the primary filter 120 close to the inlet port, thereby protecting the primary filter 120 and the bilge water flowing through the primary filter 120. It is possible to increase the lifespan of the primary filter 120 by inducing it to pass evenly throughout.

The lower case 140 has a filtered water discharge valve 141 at the lower end and is connected to a pipe to which the discharge valve is connected, and the secondary filter coupling part 144 located at the bottom of the cylinder has a secondary filter 150 and A thread is formed for coupling. In addition, the lower case 140 includes a pressure sensor 143 and a flushing water suction valve 142 on the side of the cylindrical shape.

The lower pipe connected to the filtered water discharge valve 141 is connected to the secondary filter 150, so that the filtration process is completed and the bilge water having an oil content of 5 ppm or less is discharged to the outside.

The flushing water suction valve 142 is a valve that supplies water for back flushing the primary filter.

Referring to FIG. 8 , clean water is supplied through the flushing water suction valve 142 to flow water from the lower case 140 to the upper case 110 in the reverse direction, thereby removing foreign substances attached to the primary filter 120 . Thus, by making the primary filter 120 reusable, the service life of the primary filter is extended and maintenance costs are reduced.

In addition, by monitoring the pressure difference value between the upper and lower parts using the pressure sensor 114 provided in the upper case and the pressure sensor 143 provided in the lower case, when the pressure difference value exceeds 0.5 bar, the first Since a lot of oil residue is accumulated in the filter, it is desirable to perform a backflushing operation for cleaning the primary filter or to replace the primary filter.

As described above, by utilizing the pressure sensors 114 and 143 attached to the upper case 110 and the lower case 140, there is an advantage of predicting and managing the backflushing operation and replacement life of the primary filter.

The primary filter support 130 positioned between the upper case 110 and the lower case 140 has a flange connection part 132 corresponding to the flange shape of the coupling part of the upper case 110 and the lower case 140 . It has a circular plate shape, and the number of primary filter coupling holes 131 corresponding to the number of primary filters 120 capable of fixing the primary filter 120 is formed inside the circular plate.

The flange connection portion 132 of the primary filter support 130 is formed to correspond to the flange portions of the upper case 110 and the lower case 140, so that it is bolted together with the flange coupling portions of the upper case and the lower case and fixed by pressing. do.

The primary filter coupling hole 131 has a hollow body shape having a predetermined height, and a thread for coupling with the primary filter 120 is formed on the inner circumferential surface of the hollow body, and the primary filter coupling hole 131 and The circular plate connection portion of the primary filter support 130 also has a hole corresponding to the hollow.

Therefore, the primary filter support 130 divides the space between the upper case 110 and the lower case 140 and, at the same time, combines the primary filter capable of passing the fluid between the upper case 110 and the lower case 140 . By coupling and connecting the primary filter 120 to the sphere 131, the bilge water flowing into the upper case 110 passes through the primary filter and then flows into the lower case through the primary filter support.

4A and 4B , the primary filter 120 includes a primary filter membrane 121 , a filter support plate 122 , and a primary filter discharge pipe 123 .

The primary filter membrane 121 has a structure in which individual filters having a disk shape are stacked, that is, an individual filter having a hole inscribed with the outer peripheral surface of the primary filter discharge pipe 123 to be described later in the center of a circular filter is cylindrical. It has a structure that is stacked in the height direction, and by forming a structure in which the cylindrically stacked filter is compressed through the filter support plate 122 from the top and bottom, the pores of the existing filter are compressed to filter even finer particles. . At this time, it is possible to control the size and flow rate of the particles to be filtered by adjusting the compression pressure.

In the case of the primary filter 120, the primary filter 120 has a structure that filters oil over a certain size by adjusting the size of the pores formed therein.

The primary filter discharge pipe 123 is located at the center of the primary filter and has a hollow cylindrical shape. A plurality of holes are drilled in the cylindrical side part, and a thread corresponding to the coupling part of the primary filter support is formed at the lower end.

Therefore, the introduced bilge water is sucked through the side portion of the primary filter membrane 121, flows into the primary filter discharge pipe 123 contained in the primary filter membrane 121, and then flows to the lower case 140. do.

5a, 5b and 5c, the secondary filter 150 contains a plurality of adsorption cloths 152 and adsorption cloths, the first filtered bilge water is secondarily filtered, and the final 5ppm of the filtered water is discharged. and a difference filter case 151 .

Unlike the filter membrane 121 of the primary filter 120 that filters oil by the size of the pores, the adsorption cloth 152 of the secondary filter forms a plurality of adsorption cloths 152 having a predetermined size. Absorbs and removes oil contained in bilge water.

The adsorption cloth 152 has the effect of maximizing the contact area with the bilge water because it consists of a plurality of adsorption cloths having a certain size.

The secondary filter case 151 has a cylindrical shape, the side part is sealed, and a hole through which the primary filtered bilge water can pass is formed in the upper or lower part to form a passage through which oil can be adsorbed from the adsorption cloth. A thread corresponding to the thread of the secondary filter coupling hole 144 is formed in the lower part.

The secondary filter case 151 is described with reference to FIGS. 5A to 5C according to an embodiment of the present invention, but is not limited thereto. The secondary filter case 151 may contain an adsorption cloth inside, and the flow of bilge water is formed inside, It is self-evident that it can have various shapes as long as the structure can discharge the filtered water through the inner pipe after the bilge water and the adsorption cloth are brought into contact.

In addition, a secondary filter discharge pipe 153 is provided inside the secondary filter case 151 . The secondary filter outlet pipe 153 has a cylindrical structure similar to the primary filter outlet pipe 123, and has a plurality of holes formed on the side part, and the lower part is connected to the coupling port of the secondary filter case 151, through the hole in the side part. When the secondary filtered filtered water flows through the secondary filter 150, the adsorption cloth 152, it is discharged to the filtered water discharge valve 141 through the lower coupling port.

In addition, it is possible to increase the filtration efficiency by adjusting the position of the hole through which the primary filtered bilge water formed in the secondary filter case 151 passes.

Therefore, the secondary filter case 151 has a structure that can discharge the filtered bilge water through the secondary filter discharge pipe after filtration by fixing the adsorption cloth 152 on the inside and contacting the bilge water. It is clear that this is applicable.

6 to 7, a hole through which the primary filtered bilge water flows is placed on the upper portion of the secondary filter case 151 to suck the flow of the bilge water from above, or placed only at the bottom so that the bilge number is 2 By allowing the inflow through the lower part of the primary filter case 151, the flow of the bilge water may be discharged to the secondary filter discharge pipe through more adsorption cloths.

The operation process of the filter of the double filter for ship water treatment will be described with reference to FIGS. 6 to 8 .

After the bilge water containing 15 ppm or more oil is introduced into the upper case 110 through the bilge water intake valve 113, it passes through the primary filter 120 and the oil with large particles is filtered in the lower case 140. As the secondary filter 150 of the lower case 140 adsorbs residual oil, the filtered bilge water having 5 ppm is finally discharged.

Here, the bilge water flowing into the upper case 110 may contain light oil that floats on water, and the oil that floats on water cannot flow through the filter to the lower case and is inevitably accumulated on the top. Oil that is lighter than water accumulated on the upper part is sensed by the oil sensor 111 located at the upper end of the upper case 110, and the oil is drained and discharged.

In the oil drain method, the oil drain valve 112 provided at the upper end of the upper case 110 is opened while the bilge water intake valve 113 and the filtered water discharge valve 141 are closed, and the flushing provided in the lower case 140 is closed. By supplying fresh water through the water suction valve 142, the light oil accumulated on the top is discharged together with water.

In this case, fresh water supplied through the flushing water suction valve 142 is supplied from the lower case 140 through the primary filter 120 to the upper case 110 to form a flow opposite to the normal filter process. As a result, it may have a back-flushing effect to remove foreign substances or oil attached to the primary filter.

In the above, although embodiments of the present invention have been described, those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the spirit of the present invention described in the claims. The present invention may be variously modified and changed by, etc., and this will also be included within the scope of the present invention.

1 Double filter for ship water treatment
100 filter case 110 upper case
111 Oil sensor 112 Oil drain valve
113 Bil water intake valve 114 Pressure sensor
120 Primary filter 121 Filter membrane
122 Filter support plate 123 Primary filter outlet pipe
124 guide plate
130 Primary filter support 131 Primary filter connector
132 Flange connection
140 Lower case 141 Filtered water discharge valve
142 Flushing water suction valve 143 Pressure sensor
144 Secondary filter connector
150 secondary filter 151 secondary filter case
152 Adsorption cloth 153 Secondary filter discharge pipe
154 connector
200 filter case support

Claims (5)

an upper casing having an oil sensor, an oil drain valve, a bilge suction valve, and a pressure sensor;
a primary filter support for fixing the primary filter by coupling between the upper casing and the lower casing;
a lower casing having a filtered water discharge valve and a pressure sensor; and
Dual filter for water treatment of ships, characterized in that it includes a primary filter and a secondary filter
According to claim 1, wherein the bilge water intake valve,
Double filter for ship water treatment, characterized in that it is formed spaced apart from the center so as to form a circular flow along the inner circumferential surface of the upper casing
According to claim 2, wherein the upper casing,
Double filter for ship water treatment, characterized in that it further comprises a guide plate that prevents the bilge water from directly contacting the primary filter
According to claim 1, wherein the secondary filter,
Double filter for ship water treatment, characterized in that it increases the filtration efficiency by flowing the bilge water only to the lower part
According to claim 1, wherein the lower casing,
Double filter for ship water treatment, characterized in that it further comprises a flushing water suction valve for back flushing of the primary filter

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