KR20140071653A - A gravity ballasting system and a method of back-flushing a filter using the same - Google Patents

A gravity ballasting system and a method of back-flushing a filter using the same Download PDF

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Publication number
KR20140071653A
KR20140071653A KR1020120139474A KR20120139474A KR20140071653A KR 20140071653 A KR20140071653 A KR 20140071653A KR 1020120139474 A KR1020120139474 A KR 1020120139474A KR 20120139474 A KR20120139474 A KR 20120139474A KR 20140071653 A KR20140071653 A KR 20140071653A
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KR
South Korea
Prior art keywords
filter
backwash
ballasting
seawater
backwashing
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Application number
KR1020120139474A
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Korean (ko)
Inventor
공창훈
정길주
Original Assignee
현대중공업 주식회사
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Priority to KR1020120139474A priority Critical patent/KR20140071653A/en
Publication of KR20140071653A publication Critical patent/KR20140071653A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter

Abstract

The present invention relates to a gravitational ballasting apparatus and a filter backwashing method using the gravitational ballasting apparatus, wherein the gravitational ballasting apparatus comprises: a seawater inlet for sucking seawater; A filtering device for filtering foreign matter contained in seawater introduced from the seawater inlet into a filter; A sterilizing device for sterilizing microorganisms or organisms contained in the seawater introduced from the filtration device by an ultraviolet ray reactor; A ballast tank for storing seawater introduced from the sterilizing device; And a filter backwash system for backwashing seawater flowing through the inside of the filtration apparatus to clean the filter, wherein the filter backwashing system comprises: a filter backwash line extending from the sterilization apparatus to the outlet of the filter; And a backwash pump installed in the filter backwash line for forcibly returning the seawater toward the outlet of the filter during backwash operation.
The gravitational ballasting apparatus and the filter backwashing method according to the present invention are designed such that the filter backwashing system is operated when the filter seals the foreign substances contained in the seawater and the differential pressure at the inlet and outlet of the filter increases to a differential pressure that interferes with ballasting The filter can be effectively cleaned without fear of clogging of the filter due to insufficiency of filter back-tension, and when the backwashing operation is finished, the ballasting operation The driving efficiency can be improved.

Figure P1020120139474

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravity ballasting apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravitational ballasting apparatus and a filter backwashing method using the same.

Rig Rigging, or Drilling Semisubmergible Rig, is an offshore plant with equipment for drilling that typically involves placing a plurality of columns on a pair of pontoon and connecting the columns A drilling rig is installed on the upper deck.

Such a rigging line maintains the posture and draft by ballasting or de-ballasting an appropriate amount of seawater as ballast water in a plurality of ballast tanks located in columns and pontoons.

A ballast water treatment system (BWTS) for treating ballast water is applied to the league line.

A ballast water treatment device is a device for sterilizing microorganisms or organisms of seawater and filtering out foreign matter, and is composed of a filter and a UV reactor.

However, in a league line where a gravity filling system is applied in a ballasting manner, when a filter for removing foreign substances adhered to a filter of a ballast water treatment apparatus and aquatic organisms is reversed, The filter is not effectively cleaned, and in some cases, the filter may be clogged during operation to stop ballasting. In this case, the operator must perform the cleaning after separating the filter elements. Therefore, not only the operation time is required but also the inflow of the ballast water during the cleaning operation is all blocked, so that the driving time of the ballast water treatment device is long, There is a problem of deterioration.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide a water purifier for generating a differential pressure necessary to provide a driving force upon backwashing a filter during a ballasting operation, Stitching device and a method of backwashing the filter using the same.

The gravitational ballasting apparatus according to an embodiment of the present invention includes: a seawater inlet for sucking seawater; A filtering device for filtering foreign matter contained in seawater introduced from the seawater inlet into a filter; A sterilizing device for sterilizing microorganisms or organisms contained in the seawater introduced from the filtration device by an ultraviolet ray reactor; A ballast tank for storing seawater introduced from the sterilizing device; And a filter backwash system for backwashing seawater flowing through the inside of the filtration apparatus to clean the filter, wherein the filter backwashing system comprises: a filter backwash line extending from the sterilization apparatus to the outlet of the filter; And a backwash pump installed in the filter backwash line for forcibly returning the seawater toward the outlet of the filter during backwash operation.

The method for backwashing a filter using a gravity ballasting device according to an embodiment of the present invention includes a seawater inlet, a filtration device, a sterilization device, a ballast tank, and a filter backwash line extending from the sterilization device to an outlet of the filter of the filtration device And a filter backwashing system including a backwash pump, wherein the filter backwashing line is opened and the filter backwash line is shut off, step; A second step of confirming whether the differential pressure at the filter inlet / outlet is increased from the first differential pressure to a second differential pressure that interferes with ballasting; Closing the ballasting line and opening the filter back-washing line to prepare backwash operation; A fourth step of operating the backwash pump of the filter backwashing system and the circulation pump of the sterilization apparatus to perform filter backwashing; A fifth step of stopping the backwash pump to end the filter backwash operation; And a sixth step of interrupting the filter back line, opening the ballasting line, stopping the circulation pump, and restarting the ballasting operation by gravity.

The gravitational ballasting apparatus and the filter backwashing method according to the present invention are designed such that the filter backwashing system is operated when the filter seals the foreign substances contained in the seawater and the differential pressure at the inlet and outlet of the filter increases to a differential pressure that interferes with ballasting The filter can be effectively cleaned without fear of clogging of the filter due to insufficiency of filter back-tension, and when the backwashing operation is finished, the ballasting operation The driving efficiency can be improved.

1 is a schematic diagram of a gravitational ballasting apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a method of backwashing a filter using a gravitational ballasting apparatus according to an embodiment of the present invention. Referring to FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the solid line arrows shown in the figure indicate ballasted sea water flow, that is, the ballasting line, and the dotted arrows (---) indicate the flow of seawater during filter backwashing, that is, the filter backlash line.

FIG. 1 is a front view of a gravitational ballasting apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart illustrating a method of backwashing a filter using a gravitational ballasting apparatus according to an embodiment of the present invention.

1, a gravitational ballasting apparatus 1 according to an embodiment of the present invention includes a sea chest 10, a filtration apparatus 20, a sterilizing apparatus 30, a ballast tank (ballast tank) a tank 40, a filter back-flushing system 50, and an over board 60.

The gravity ballasting device 1 is a gravity filling system as a ballasting type and the ballast water treatment system BWTS is a filtration device 20 and a sterilizing device 30 , And a filter backwashing system 50.

The seawater intake port 10 sucks seawater by gravity and supplies sea water to the ballast tank 40 to be described later, that is, ballast.

The seawater sucked into the seawater inlet 10 can be largely supplied to the ballast tank 40 by two ballasting methods. The first ballasting method, which will be described below, A ballast water treatment apparatus is an operation option applied in an emergency situation and a second ballasting method is a normal operation option to which the embodiment of the present invention is applied.

The first ballasting system includes a transfer pipeline 11 extending from the seawater inlet 10, a ballast water treatment device bypass piping 41 branched from the transfer pipeline 11, a ballast water treatment device bypass The seawater can be supplied to the ballast tank 40 through the ballast piping 44 communicated with the pipe 41 and connected to the ballast tank 40.

At this time, the first valve (2a) provided in the ballast water treatment device bypass pipe (41) and the eighth valve (2h) provided in the ballast piping (44) are opened and all the remaining valves are shut off.

The second ballasting system includes a transfer pipeline 11 extending from the seawater inlet 10, a ballast water treatment device inlet pipe 42 branched from the transfer pipeline 11, a ballast water treatment device inlet pipe A sterilizing device 30 connected to the filtration device 20 and connected to the sterilizing device 30 and connected to the ballast tank 40 at the other end, The ballast tank 40 can be supplied with the seawater.

The 14-1 valve 2n-1 installed between the transfer pipeline 11 and the ballast water treatment device inflow pipe 42 is connected to the ballast water treatment device inflow pipe 42 and the filter 21 A third valve 2c provided between the filter inlet pipes 22, a fourth valve 2d provided in the filter outlet pipe 23 connected to the outlet of the filter 21, a filter outlet pipe 23 Fifth and sixth valves 2e and 2f provided in the inlet pipe 33 for the reactor to be connected and a seventh valve 2g provided in the outlet pipe 34 connected to the outlet of the ultraviolet reactor 31, The eighth valve 2h provided in the sting pipe 44 is opened, and all the remaining valves are shut off.

The seawater supplied in the second ballasting mode is sterilized by the filtration device 20 and the sterilizing device 30 to sterilize microorganisms or organisms contained in seawater and filter out foreign matter.

Since the ballasting operation mode of the second ballasting mode may include a ballasting operating mode of a commonly used gravity ballasting apparatus, a detailed description of the ballasting operating mode applied to the present invention Omit it.

On the other hand, the ballast water can also be ballasted through the filter bypass pipe 43 communicating with the ballast water treatment device inlet pipe 42 and provided with the second valve 2b, And the description thereof will be omitted in the embodiment of the present invention.

The filtration device 20 is a device for filtering out foreign substances contained in the seawater introduced from the seawater inlet 10 and includes a filter 21, a filter inlet pipe 22, a filter outlet pipe 23, A backwash discharge pipe 24, and a plurality of third and fourth valves 2c and 2d.

The filter 21 is connected to the ballast water treatment device inlet pipe 42 at one end and the filter inlet pipe 22 at the other end for connection to the inlet of the filter 20, In the ballasting operation mode, the filtered seawater is discharged through a filter outlet pipe (23) connected to the outlet of the filter (21) to a sterilization device (30) to be described later, During the filter back-flushing procedure, the backwash pump 51 of the filter backwashing system 50, which will be described later, is actuated to forcibly reverse the seawater. Therefore, foreign matter adhering to the filter 21 is discharged to the outside send. The filter backwashing procedure will be described in detail in the following description of the filter backwashing method.

The sterilizing device 30 is a device for sterilizing microorganisms or organisms contained in the seawater introduced from the seawater inlet 10 or the filtration device 20 and includes a UV reactor 31, a circulation pump 32 ), An inlet pipe 33 for a reactor, an outlet pipe 34 for a reactor, a first circulation pipe 35 for a reactor, a second circulation pipe 36 for a reactor, a plurality of fifth, sixth, seventh, 9, and a tenth valve 2e, 2f, 2g, 2i, 2j.

The ultraviolet ray reactor 31 is connected to the filter outlet pipe 23 and the other end is connected to the inlet of the ultraviolet ray reactor 31 through the inflow pipe 33 for the reactor, The microbes or organisms are sterilized. In the ballasting operation mode, the sterilized seawater is discharged to the ballast tank 40 through the outflow pipe 34 for the reactor and ballasted, and the filter back-flushing procedure The circulation pump 32 is operated to circulate the seawater in the sterilizing device 30 through the first and second circulation pipes 35 and 36 for the reactors connected to the inlet and the outlet of the circulation pump 32, The seawater is supplied back to the filter 21 by the driving force of the filter backwashing system 50 to be described later via the filter bypass piping 43 connected to the second circulation pipe 36 for the purpose of preventing foreign matters And the like. The filter backwashing procedure will be described in detail in the following description of the filter backwashing method.

A plurality of ballast tanks 40 may be installed on pillars and pontoons of the league line. Ballast tanks 40 may be provided with ballast water by means of the gravity filling system, using seawater introduced from the seawater inlet 10 or the sterilizing device 30, Or de-ballasting, the posture and draft of the league line can be maintained.

The filter back-flushing system 50 is a system for forcibly returning the ballasted seawater to remove foreign substances adhering to the filter 21 together with backwash water. The back-flushing pump 51 A reverse osmosis inflow pipe 52 having one end connected to each of the transfer pipeline 11 and the ballast water treatment device inflow pipe 42 and the other end connected to the backwash pump 51, 51, and the other end is connected to a filter outlet pipe 23 at the outlet of the filter 21, and a plurality of eleventh, twelfth, thirteenth, and fourteenth-two valves 2k , 2l, 2m, 2n-2). Here, the eleventh and fourteenth valves 2k and 2n-2 can be used for backwash line shutoff or opening, and the twelfth and thirteenth valves 2l and 2m can be used for backwash pump 51 have. The backwater inflow pipe 52 connected to one end of the backwash pump 51 which is a component of the filter backwashing system 50 and the backwash water pipe 53 connected to the other end of the backwash pump 51 are connected to each other at step S140 May be included in the filter backslash line in FIG.

The backwash pump 51 blocks the third and fourth valves 2c and 2d at the upstream and downstream ends of the filter back filter 21 and the seventh valve 2g at the downstream end of the ultraviolet reactor 31, The 14-1 valve 2n-2 provided in the inlet pipe 52 and the second valve 2b installed in the filter bypass pipe 43 are opened and pumped so that seawater flows through the outlet of the filter 21 Is supplied to the outlet of the filter (21) through the reverse water supply pipe (53) connected to the pipe (23).

The over board 60 is connected to a reverse discharge pipe 54 connected to the backwash discharge pipe 24 for the filter below the filter 21 so that the sea water is discharged to the outside .

A method of backwashing a filter using the gravitational ballasting apparatus 1 equipped with the filter backwashing system 50 having the above-described configuration will be described with reference to FIGS. 1 and 2. FIG. The filter backwashing method can be applied to the second ballasting method in which the sea water passes through the filtration device 20 among the two types of ballasting methods described above.

1 and 2, the filter backlash method using the gravitational ballasting apparatus 1 according to an embodiment of the present invention includes the steps of opening the ballasting line and shutting off the filter back line, (S120) of confirming whether the differential pressure at the inlet and outlet of the filter (21) of the filtration device (20) has increased from the first differential pressure to the second differential pressure that hinders ballasting, The backwash pump 51 of the filter backwashing system 50 and the circulation pump 32 of the sterilization apparatus 30 are actuated by opening the filter backwash line and preparing the backwash operation (S130) (Step S140), stopping the backwash pump 51 to terminate the filter backwash operation (step S150), shutting off the filter backwash line, opening the ballasting line, stopping the circulation pump 32 , And resuming the ballasting operation by gravity (S16 0).

In step S110, the ballasting operation is started by gravity, with the ballasting line opened and the filter back line disconnected.

The opening of the ballasting line means that the 14-1 valve (2n-1) connected to the ballast water treatment device inflow pipe (42) and connected to the seawater suction port (10) A third valve 2c provided in the filter inlet pipe 22 provided between the inlet of the device inlet pipe 42 and the filter 21 and a third valve 2c provided in the filter outlet pipe 23 provided at the outlet of the filter 21 Fifth and sixth valves 2e and 2f provided in a reactor inlet pipe 33 provided between the filter 4 and the filter outlet pipe 23 and the inlet of the ultraviolet reactor 31, A seventh valve 2g provided in the outflow pipe 34 for the reactor provided at the outlet of the ballast tank 31 and a seventh valve 2b provided in the ballasting pipe 44 provided between the outflow pipe 34 for the reactor and the ballast tank 40 8 valve (2h) is opened. Therefore, the seawater sucked through the seawater inlet 10 passes through the transfer pipeline 11, the ballast water treatment device inlet pipe 42, the filter 21, the filter outlet pipe 23, the reactor inlet pipe 33 ), The ultraviolet ray reactor 31, and the outflow pipe 34 for the reactor, to the ballast tank 40.

The blocking of the filter back-flushing line means that the 14-2 valve (not shown) provided in the back-flow inlet pipe 52 connected to each of the transfer pipe line 11 connected to the seawater inlet 10 and the ballast water treatment device inlet pipe 42, A second valve 2b provided in the filter bypass pipe 43, a backwash discharge pipe 24 connected to the lower portion of the filter 21, and a reverse discharge pipe connected to the overboard 60 54) of the first valve (2k).

In step S120, it is confirmed whether the differential pressure at the inlet and outlet of the filter 21 of the filtration device 20 has increased from the first differential pressure to the second differential pressure that hinders ballasting.

When the ballasting operation is started from the step S110, the seawater passing through the filter 21 is kept flowing in the forward direction by a differential pressure due to gravity. The seawater passes through the inside of the filter 21, and an internal flow pressure loss occurs, so that the inlet and outlet of the filter 21 are forced to generate differential pressure. While the ballasting operation is continued, the foreign matter contained in the seawater is filtered in the filter 21 and the flow of the seawater is interrupted, so that the pressure difference between the inlet and the outlet of the filter 21 gradually increases. As a result, do. The differential pressure at the inlet and outlet of the filter 21 when the filter 21 is clean is defined as the first differential pressure and the pressure difference between the inlet and outlet of the filter 21 when the filter 21 is adhered to the ballast It is defined as the second pressure.

The first pressure difference at the inlet and outlet of the filter 21 is maintained as a differential pressure when the filter 21 is in a clean state, for example, in the range of 0.1 to 0.2 bar, so that the ballasting is not impaired.

The second differential pressure at the inlet and outlet of the filter 21 is set to a differential pressure when the foreign substances contained in the seawater are adhered to the ballast, that is, a range larger than the value of the first differential pressure, for example, about 0.5 bar Can be managed.

The time when the second pressure difference set by the manager reaches the filter backwash operating condition is the time when the filter 21 needs to be cleaned and accordingly the second pressure difference needs to be checked. That is, the balustering operation is continued until the second differential pressure is reached, and when the second differential pressure is reached, the balustering operation is stopped to clean the filter 21 and the filter back-up line is opened to prepare the filter back- Because.

In step S130, the ballasting line is shut off, and the filter back-washing line is opened to prepare backwash operation.

When the filter backwash operation condition is reached from the above step S120, the balustering operation is stopped by interrupting the ballasting line in step S130, and the filter backwash line is opened to prepare the filter backwash operation. The blocking of the ballasting line is accomplished by shutting off the 14-1 valve, 3, 4 and 7 valves 2n-1, 2c, 2d and 2g. The opening of the filter back-flushing line is accomplished by opening valves 14-2, 2, 9, 10, 11, 12, 13 valves 2n-2, 2b, 2i, 2j, 2k, 2l, 2m.

In step S140, the backwash pump 51 of the filter backwashing system 50 and the circulation pump 32 of the sterilizer 30 are actuated to advance the filter backwash.

The backwash pump 51 of the filter backwashing system 50 is started to start backwash operation and the circulation pump 31 of the sterilizer 30 is operated to prevent overheat in the ultraviolet sterilizer 30, Circulates the seawater through the closed loop during the period. The foreign substances accumulated in the filter 21 by the backwash pump 51 can be discharged to the outlet of the filter 21 along the flow of backwash water.

With the pumping of the backwash pump 51, seawater staying in the pipes 33, 34, 35, 36 provided in the sterilizing device 30, as shown by dashed arrows (---) A filter bypass pipe 43 connected to the second circulation pipe 36 for use in the first circulation pipe 36, a ballast water treatment device inflow pipe 42, a reverse osmosis inflow pipe 52, a backwash pump 51, a reverse osmosis water pipe 53, The seawater is forcibly supplied to the filter 21 through the outflow pipe 23 and the seawater supplied to the filter 21 forcibly flows through the backwash discharge pipe 24 for the filter connected to the lower portion of the filter 21, And is discharged from the boat through the overboard 60 via the opening 54. The backwashing operation of the filter through the filter back-flushing line may proceed from several seconds to several tens of seconds.

In step S150, the backwash pump 51 is stopped to end the filter backwash operation.

If foreign substances adhered to the filter 21 are removed by the filter backwashing operation for several seconds to several tens of seconds in the step S140, the backwash pump 51 is stopped to end the filter backwash operation. As a result, the filter backwashing procedure is completed primarily.

In step S160, the filter backwash line is blocked, the ballasting line is opened, the circulation pump 32 is stopped, and the ballasting operation by gravity is resumed.

Although the filter backwashing procedure is completed in the above step S150, the ballasting operation in step S160 must be continuously performed because the ballasting of the league line must be maintained. That is, after the process from step S110 to step S160, the cycle of feedback from step S160 to step S120 can be continued.

Thus, the present embodiment allows the filter backwashing system 50 to operate, such that when the differential pressure at the inlet and outlet of the filter 21 increases to a second differential pressure (e. G., About 0.5 bar) And the cleaned filter 21 is ballasted at a first differential pressure (for example, 0.1 to 0.2 bar) which does not interfere with the ballasting, When the differential pressure at the inlet and outlet of the filter 21 increases to the second differential pressure, the filter backwashing system 50 is restarted again. The filter 21 can be automatically cleaned by the filter backwashing system 50 so that the differential pressure at the inlet and outlet of the filter 21 is maintained within a range between the first differential pressure value and the second differential pressure value, It can be managed in the range of 0.5 bar.

The present embodiment is characterized in that the ballasting apparatus 1 is provided with the filter backwashing system 50 so that the process proceeds from step S110 to step S160 and then from step S160 to step S120, The ballasting operation and the backwashing of the filter can be repeatedly performed while circulating S160.

On the other hand, the time point at which the filter backwash operation condition is reached is based on the second pressure difference, which is the pressure difference between the inlet and the outlet of the filter 21, which negatively affects the ballasting. In the embodiment of the present invention described above, , Which can be managed by changing the second differential pressure value, for example, to 0.4 bar or 0.6 bar in consideration of the surrounding dogs and the like.

As described above, in the present embodiment, when the filter 21 filters foreign substances contained in seawater and the differential pressure at the inlet and outlet of the filter 21 increases to a differential pressure that interferes with ballasting, the filter backwashing system 50 is operated The filter 21 can be effectively cleaned without fear of clogging due to insufficiency of backwash of the filter and the ballasting operation can be performed when the backwashing operation of the filter is completed, The driving efficiency can be improved.

Therefore, in this embodiment, the differential pressure required for providing the driving force for backwashing the filter can not be formed in the league line applying the gravity filling system by the ballasting method, and the operator performs cleaning after separating all of the ballast water treatment devices , A lot of working time is required, and the ballast water treatment device must be driven after the cleaning operation. However, the conventional problems that the driving time is long and the driving efficiency is lowered can be solved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: gravity ballasting devices 2a to 2m, 2n-1, 2n-2: valves
10: Seawater inlet 11: Transfer pipeline
20: Filtration device 21: Filter
22: filter inlet pipe 23: filter outlet pipe
24: backwash discharge pipe for filter 30: sterilizing device
31: ultraviolet reactor 32: circulation pump
33: inlet pipe for the reactor 34: outlet pipe for the reactor
35: first circulation tube for reactor 36: second circulation tube for reactor
40: ballast tank 41: ballast water treatment device bypass piping
42: Ballast water treatment device inlet pipe
43: filter bypass piping 44: ballasting piping
50: filter backwash system 51: backwash pump
52: Inlet pipe for reverse osmosis 53: Water supply pipe for reverse osmosis
54: stationary discharge pipe 60: overboard

Claims (7)

A seawater inlet for sucking seawater;
A filtering device for filtering foreign matter contained in seawater introduced from the seawater inlet into a filter;
A sterilizing device for sterilizing microorganisms or organisms contained in the seawater introduced from the filtration device by an ultraviolet ray reactor;
A ballast tank for storing seawater introduced from the sterilizing device; And
And a filter backwash system for backwashing seawater flowing through the inside of the filtration apparatus to clean the filter,
The filter backwash system comprises:
A filter backwash line extending from the sterilizing device to the outlet of the filter; And
And a backwash pump installed in the filter backwash line for forcibly returning the seawater toward the outlet of the filter during backwash operation. A filter having a filter backwashing system including a backwash pump provided in a filter backwash line extending from the sterilizing device to an outlet of a filter of the filtration device, In the backwashing method,
A first step of starting a ballasting operation by gravity in a state in which the ballasting line is opened and the filter back line is blocked;
A second step of confirming whether the differential pressure at the filter inlet / outlet is increased from the first differential pressure to a second differential pressure that interferes with ballasting;
Closing the ballasting line and opening the filter back-washing line to prepare backwash operation;
A fourth step of operating the backwash pump of the filter backwashing system and the circulation pump of the sterilization apparatus to perform filter backwashing;
A fifth step of stopping the backwash pump to end the filter backwash operation; And
And a sixth step of blocking the filter back-flushing line, opening the ballasting line, stopping the circulation pump, and restarting the ballasting operation by gravity. Way. 3. The apparatus of claim 2, wherein the means for blocking and opening the filter back-
A valve provided in a filter bypass pipe connected to the backwash pump, a valve installed in a filter bypass pipe, a backwash discharge pipe for a filter provided below the filter, and a valve installed between the backwash discharge pipe. Used filter backwashing method. 3. The fuel cell system according to claim 2,
Wherein the differential pressure is maintained in the range of 0.1 to 0.2 bar when the filter is in a clean state. 3. The method according to claim 2,
Wherein the pressure difference is set in a range of 0.4 to 0.6 bar when foreign matter is accumulated in the filter. 3. The method according to claim 2,
Wherein the balustering operation continues until the differential pressure of the filter inlet / outlet is increased from the first differential pressure to the second differential pressure, and proceeds to the third step when the differential pressure increases to the second differential pressure. Used filter backwashing method. 3. The method of claim 2,
The ballasting operation and the backwashing of the filter are repeated by repeating the sixth step from the first step to the sixth step and feeding back to the second step from the second step to the sixth step Gt; a < / RTI > gravitational ballasting apparatus further comprising:
KR1020120139474A 2012-12-04 2012-12-04 A gravity ballasting system and a method of back-flushing a filter using the same KR20140071653A (en)

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WO2018190576A3 (en) * 2017-04-12 2019-01-03 한라아이엠에스 주식회사 Ballast water treatment system, and filter structure for ballast water treatment system
CN111003873A (en) * 2020-01-19 2020-04-14 武义义蓝日用金属制品有限公司 Portable water treatment equipment
KR20200109176A (en) * 2019-03-12 2020-09-22 주식회사 하이로닉 Apparatus for filtering microplastics and filtering method using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018190576A3 (en) * 2017-04-12 2019-01-03 한라아이엠에스 주식회사 Ballast water treatment system, and filter structure for ballast water treatment system
KR20200109176A (en) * 2019-03-12 2020-09-22 주식회사 하이로닉 Apparatus for filtering microplastics and filtering method using the same
CN111003873A (en) * 2020-01-19 2020-04-14 武义义蓝日用金属制品有限公司 Portable water treatment equipment

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