KR20210027739A - Water treatment apparatus using ozone bubble - Google Patents

Abstract

A water treatment apparatus using ozone bubbles according to an embodiment of the present invention comprises: a coagulation tank installed in a ship; a flotation tank provided at the rear end of the coagulation tank; a first supply line supplying ballast water from a ballast water tank of the ship to the flotation tank; a second supply line supplying waste washing water generated from a scrubber installed in the ship to the coagulation tank; and a bubble supplier for supplying bubbles to the flotation tank. Moreover, when the ballast water is supplied to the flotation tank, the bubble supplier can supply ozone bubbles.

Description

Water treatment device using ozone bubbles {WATER TREATMENT APPARATUS USING OZONE BUBBLE}

The present invention relates to a water treatment apparatus using ozone bubbles.

Ships are widely used as a means of transporting large quantities of goods at once or for military purposes.

If there are not many people, equipment, and objects (collectively referred to as cargo), the ship does not sink enough underwater, so it can easily shake even in small waves, and even propellers and rudders are not sufficiently submerged. It doesn't work efficiently.

Accordingly, the ship unloading cargo is operated in a state containing seawater, that is, ballast water (ballast water) in a ballast tank in order to maintain balance and increase stability. As a result, the ship's ballast water plays the role of a weight that adjusts the draft and trim of the ship.

Ballast water is filled into the ballast tanks formed on both sides of the bottom of the ship to maintain the balance of the ship. The ship is operated after loading the ballast tank in the ballast tank at the point of departure, and when it arrives at a port of another region or other country, the ship's ballast water is discharged to the sea at the destination to reduce the weight of the ship, and then the cargo is reloaded. .

In the ballast water of the ship, various organisms such as fresh water in the area filled with the ballast water or pathogens and plankton contained in the seawater are inhabited. Therefore, if the ballast water is discharged to the shore of another area without any treatment, serious marine pollution due to the ballast water and There is a high concern that it will cause the destruction of the ecosystem. There is a concern that organisms from different ecosystems are mixed, which not only disturbs the ecosystem, but also causes great damage to coastal industries or other commercial activities or resources.

Accordingly, the inventors of the present invention came to complete the present invention after a long study and trial and error for a water treatment apparatus using ozone bubbles.

An object of the present invention is to provide a water treatment apparatus using ozone bubbles capable of purifying waste water and ballast water in a dischargeable state.

Still other objects, not specified, of the present invention will be additionally considered within the range that can be easily deduced from the following detailed description and effects thereof.

According to an aspect of the present invention, a coagulation tank installed on a ship; A floating tank provided at the rear end of the coagulation tank; A first supply line for supplying ballast water from the ballast water tank of the ship to the floating tank; A second supply line for supplying waste water generated from the scrubber installed on the ship to the coagulation tank; And a bubble supplier for supplying bubbles to the floating tank, and when ballast water is supplied to the floating tank, the bubble supplier supplies ozone bubbles to a water treatment apparatus using ozone bubbles.

When ballast water is supplied to the floating tank, the second supply line is blocked, and when waste water is supplied to the coagulation tank, the first supply line may be blocked.

When waste water is supplied to the coagulation tank, the bubble supplier may supply air bubbles.

The bubble supplier includes a dissolution tank, and when ballast water flows into the floating tank, ozone is supplied to the dissolution tank, and when waste washing water flows into the coagulation tank, air may be supplied to the dissolution tank.

A sluice gate installed between the coagulation tank and the floating tank may be further included, and when waste water is introduced into the coagulation tank, the sluice gate is opened, and when ballast water flows into the floating tank, the sluice gate may be closed.

A filtration module installed in the floating tank may be further included, and ballast water or waste washing water accommodated in the floating tank may pass through the filtration module and be discharged to the outside.

The bubble supplier may supply bubbles to the filtration module side.

According to an embodiment of the present invention, it is possible to effectively sterilize waste water and ballast water.

On the other hand, even if it is an effect not explicitly mentioned herein, it is added that the effect described in the following specification and its provisional effect expected by the technical features of the present invention are treated as described in the specification of the present invention.

1 is a view showing a water treatment apparatus using ozone bubbles according to an embodiment of the present invention.
2 to 4 are views showing a water treatment apparatus using ozone bubbles according to another embodiment of the present invention.
5 and 6 are views showing a water treatment apparatus using ozone bubbles according to another embodiment of the present invention.
7 and 8 are views showing a water treatment apparatus using ozone bubbles according to another embodiment of the present invention.
9 to 11 are views showing various bubble feeders of the water treatment apparatus using ozone bubbles according to the present invention.
The accompanying drawings are exemplified by reference for an understanding of the technical idea of the present invention, and the scope of the present invention is not limited thereto.

In describing the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as matters obvious to those skilled in the art with respect to known functions related to the present invention, a detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Hereinafter, embodiments of a water treatment apparatus using ozone bubbles according to 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 numbers, and thus A redundant description of this will be omitted.

1 is a view showing a water treatment apparatus using ozone bubbles according to an embodiment of the present invention.

Referring to FIG. 1, a water treatment apparatus 1000 using ozone bubbles according to an embodiment of the present invention treats ballast water B.

That is, the water treatment apparatus 1000 is connected to the ballast water tank 4 to receive the ballast water B, and treats the ballast water B using ozone. Here, the ballast water (B) treatment may be aimed at removing microorganisms in the ballast water (B) by sterilizing the ballast water (B).

Ballast water (B) can be derived from sea water (SW). A seawater line SL is connected to the ballast water tank 4, and seawater SW is introduced into the ballast water tank 4 and stored through the seawater line SL. In addition, when the ballast water B is discharged from the ballast water tank 4, it moves through the supply line L1 and is supplied to the water treatment apparatus 1000. Here, a supply line for supplying the ballast water B from the ballast water tank 4 to the water treatment apparatus 1000 may be referred to as a “first supply line L1”.

On the other hand, the water treatment apparatus 1000 using ozone bubbles according to an embodiment of the present invention treats the waste water A discharged from the scrubber 3 installed on the ship 1. That is, the water treatment device 1000 may be connected to the scrubber 3.

The scrubber 3 is a device that treats the exhaust gas G1 discharged from the engine 2 of the ship 1 or the like. Here, the treatment of the exhaust gas G1 may be performed for the purpose of removing nitrogen oxides and sulfur oxides in the exhaust gas G1.

The scrubber 3 includes a chamber provided with a space therein. The chamber may have a truncated cone shape in which the horizontal cross section becomes narrower toward the bottom, but is not limited thereto. The exhaust gas G1 is accommodated in the inner space of the chamber. The exhaust gas is a gas containing pollutants (hazardous substances) such as nitrogen oxides (NOx) and sulfur oxides (SOx), and may be discharged from the engine 2 of the ship 1, a generator, a boiler, or the like. The exhaust gas G1 may be introduced into the scrubber 3 through the exhaust gas line GL.

The scrubber 3 is provided with an exhaust gas inlet and a gas outlet. The exhaust gas inlet is installed below the scrubber 3 chamber to provide a passage through which the exhaust gas G1 flows into the scrubber chamber. That is, the exhaust gas inlet is connected to the exhaust gas line GL. The gas outlet is installed at the top of the scrubber chamber to provide a passage through which the processed gas G2 is discharged. The exhaust gas (G1) introduced into the scrubber chamber washing water (A ₀₎ and is in contact, washing water (A ₀₎ the gas (G2) to remove the contaminants by as rise may be through a gas discharge port discharged to the outside have. Meanwhile, the exhaust gas inlet and the gas outlet may be implemented in the form of a pipe.

A filler is provided inside the scrubber 3, and exhaust gas may rise through the filler. The filler may increase the residence time of the exhaust gas G1 by filling at least a part of the interior of the scrubber 3 chamber. The filler may include a plurality of grains. The filler forms a layer of a predetermined thickness, and may be formed of a plurality of layers. The plurality of layers of fillers may be spaced apart from each other in the vertical direction.

A demister may be installed on the inside of the scrubber 3. The demister can remove moisture from the exhaust gas path G1. The demister is a form in which a plurality of meshes are stacked in multiple layers, and by removing moisture from the treated exhaust gas G1, corrosion of the scrubber can be minimized.

Washing water A ₀ is sprayed into the scrubber 3. Washing water (A ₀ ) may include sea water. Inside the scrubber 3, as the washing water A ₀ descends and the exhaust gas G1 rises, the washing water A ₀ and the exhaust gas G1 contact each other, so that some components of the exhaust gas G1 become the washing water A Soluble in _{0 ).} Washing water (A ₀ ) that has completed its function is collected under the scrubber, and the collected waste cleaning water (A) can be discharged to the outside through the waste cleaning water outlet.

The discharged waste cleaning water (A) needs to be treated, and the waste cleaning water (A) can be treated by the water treatment apparatus 1000 of the present invention. Here, the treatment of the waste water (A) may be aimed at removing pollutants containing nitrogen and sulfur components contained in the waste water (A), and adjusting pH, turbidity, and the like.

Waste water (A) is discharged through the waste water outlet and supplied to the water treatment apparatus 1000 of the present invention. A supply line for supplying waste water A from the scrubber 3 to the water treatment device 1000 may be referred to as a'second supply line L2'. On the other hand, a raw water tank in which waste water A is stored may be provided on the second supply line L2, but may be omitted depending on the design. In addition, the first supply line L1 and the second supply line L2 described above may be formed independently of each other. In this case, a point at which the first supply line L1 is coupled to the water treatment apparatus 1000 and a point at which the second supply line L2 is coupled to the water treatment apparatus 1000 may be different from each other.

The water treatment apparatus 1000 using ozone bubbles of the present invention can also treat waste water (A) discharged from the scrubber 3 and also treat ballast water (B). In particular, the water treatment device 1000 operates the scrubber 3 and treats the waste water (A) because the exhaust gas G1 is generated when the engine 2 is operated when the ship 1 is in operation. . In addition, ballast water B can be treated when the ship 1 is not in operation (at anchor). That is, the water treatment apparatus 1000 using ozone bubbles of the present invention can selectively treat waste water (A) and ballast water (B).

Meanwhile, the water treatment apparatus 1000 using ozone bubbles of the present invention uses ozone (O ₃ ) bubbles when treating ballast water (B), and ozone bubbles and air when treating waste water (A). Air bubbles can be used, or only air bubbles can be used. That is, the water treatment apparatus 1000 using ozone bubbles according to the present invention can selectively use the type of bubbles while selectively treating waste water (A) and ballast water (B).

The treated water TW purified by the water treatment device may _{be reused as the washing water A 0} flowing into the scrubber 3 described above, used for bubble supply, or discarded into the ocean. The treated water TW may be moved through the treated water line TL. A treatment tank may be provided on the treated water line TL, but the treatment tank may be omitted if necessary.

2 to 4 are views showing a water treatment apparatus using ozone bubbles according to another embodiment of the present invention.

Referring to FIG. 2, a water treatment apparatus using ozone bubbles according to another embodiment of the present invention includes a floating tank 300, a bubble supplier 500, and a first supply line L1, and a coagulation tank 200 And a second supply line L2. In addition, the water treatment apparatus using ozone bubbles may further include a blender 100.

The waste cleaning water A may be discharged from the scrubber and collected in the raw water tank 10 on the second supply line L2, but the raw water tank 10 may be omitted. A pump P1 is provided on the second supply line L2, and the waste water A collected in the raw water tank 10 may be moved to the blender 100 by the pump P1.

The blender 100 is a device that mixes waste water (A) and chemicals. The blender 100 may be installed on the second supply line L2 through which the waste cleaning water A moves. The blender 100 is a rapid blender and may be a linemixer. The drug may contain a coagulant such as PAC. The chemicals may be stored in the chemical tank TK and then introduced into the admixture 100 by the operation of the chemical pump P2.

Meanwhile, the blender 100 may be replaced with a blender. The mixing tank is a tank that mixes the supplied raw water and chemicals. Chemicals can be stored in the chemical tank (TK) and then introduced into the mixing tank by the operation of the chemical pump (P2).

A stirrer is installed in the mixing tank so that raw water and chemicals can be effectively mixed. The stirrer may include a paddle-type stirrer, a propeller-type stirrer, a turbine-type stirrer, and the like.

The coagulation tank 200 agglomerates the mixed water to be treated (referring to the waste washed water contained in the water treatment device for convenience of explanation, the same hereinafter), and flocks the contaminants in the water to be treated. ) Is a tank. Flocking aims to increase the size of contaminants so that they can collide with microbubbles. The size (diameter) of the floc may be 32 μm or more, but is not limited thereto.

The second supply line L2 described above may be connected to the coagulation tank 200. Specifically, the second supply line L2 may be connected to the agglomeration tank 200 via the blender 100.

The agitator 210 may be installed in the agglomeration tank 200, and the agitator 210 may include a paddle-type stirrer, a propeller-type stirrer, a turbine-type stirrer, and the like. The agitator 210 of the coagulation tank 200 may be formed of a different type from the stirrer of the mixing tank.

The coagulation tank 200 may be formed in plural. The floc of contaminants may gradually increase while passing through the plurality of coagulation tanks 200. The water to be treated passing through the coagulation tank 200 flows into the front end of the floating tank 300, and the water to be treated may particularly flow into the lower portion of the floating tank 300.

The flotation tank 300 is a tank installed at the rear end of the coagulation tank 200 to use the dissolved air flotation method, and receives micro-bubbles and floats the pollutant flock into micro-bubbles.

The first supply line L1 extending from the ballast water tank 4 may be directly coupled to the floating tank 300. The first supply line L1 is connected to the lower front end of the floating tank 300 (contact tank), so that the ballast water B may flow into the lower front end of the floating tank 300.

The microbubbles are composed of gases (ozone, air, oxygen, etc.) and a membrane surrounding them, and are micro-sized bubbles and may have a diameter of 100 um or less. In addition, the nano-sized bubbles may have a diameter of 900 nm or less.

The floating tank 300 may be divided into a contact tank and a separation tank, and a partition wall 310 may be formed between the contact tank and the separation tank. That is, the front end of the partition wall 310 may be a contact tank and the rear end of the partition wall 310 may be a separation tank. The partition wall may include an inclined surface, and may be formed to be inclined by 50 to 70° in the flow direction of the water to be treated, but is not limited thereto.

The contact tank is a space to receive microbubbles, and in the contact tank, the water to be treated meets the microbubbles, so that the flocs and microbubbles in the water to be treated may collide, and the microbubbles can bind to the collided floc to float the floc. The water to be treated and microbubbles can move upward along the partition wall.

In the separation tank, flocs (also referred to as floats) (F) floated by microbubbles may be separated from the water to be treated. That is, the float F is located on the upper layer, and the water to be treated is located on the lower layer. This float (F) may form a layer of a predetermined thickness.

The floc (float) F floating to the water surface may be removed by a skimmer 320. The skimmer 320 may be implemented in various forms such as a scraper type. The floc (sludge) removed by the skimmer 320 is collected in a sludge storage tank (SS). The pump P3 may be operated to collect the sludge into the sludge storage tank SS.

A filtration module 400 may be installed in the separation tank. The filtration module 400 may be installed in the separation tank to receive the water to be treated and finally filter the water to be treated. The water to be treated passes through the filtration module 400 and is discharged as final treated water TW.

The filtration module 400 may include a membrane structure 430 immersed in the water to be treated. The membrane structure 430 is a structure including a membrane for filtration, and may be an MBR. The membrane structure 430 may be implemented in the form of a hollow fiber. The hollow fiber can be formed of various materials such as PVDF and PTFE. As the water to be treated passes through the membrane of the membrane structure 430, contaminants contained in the treated water adhere to the membrane, and clean treated water (TW) from which the contaminants are removed can be discharged from the membrane structure 430. have. The membrane structure 430 may be implemented in a cylindrical shape, but is not limited thereto.

The treated water line TL may be connected to the membrane structure 430. In particular, a pump P6 is installed in the treated water line TL, and water to be treated can pass through the membrane structure 430 by the suction operation of the pump P6.

The bubble supplier 500 is a device that supplies bubbles to the floating tank 300. Here, the bubbles may include ozone bubbles, air bubbles, oxygen bubbles, and the like. The bubble supplier 500 may supply bubbles of different gases according to the type of water to be treated by the water treatment device. For example, when the treated water is waste clean water (A), the bubble supplier 500 supplies air bubbles (or air bubbles and ozone bubbles), and when the treated water is ballast water (B), the bubble supplier 500 can supply ozone bubbles.

The bubble supplier 500 may include a dissolution tank 510. The treated water TW may be accommodated in the dissolution tank 510, and the treated water TW may be introduced into the dissolution tank 510 by the operation of the pump P4. The pump P4 may be installed on a circulation line CL connecting the end of the water treatment device and the dissolution tank 510. Alternatively, seawater may be accommodated in the dissolution tank 510 by replacing the treated water TW, and seawater may be introduced into the dissolution tank 510 by the operation of the pump.

The bubble supplier 500 may include a gas providing unit 520. The gas providing unit 520 may supply air or ozone to the dissolution tank 510. The gas providing unit 520 may supply a high-pressure gas to the dissolution tank 510. The gas providing unit 520 may include a compressor (compressor) and/or a pressurizer.

The bubble supplier 500 may include a bubble line 530 and a nozzle. The bubble line 530 may extend from the melting tank 510 to move the treated water (TW) (or seawater) and the bubbles in the melting tank 510 to the floating tank 300. The nozzle is installed at the end of the bubble line 530, and sprays treated water (TW) (or sea water) containing bubbles from the front end of the floating tank 300, particularly the lower part of the contact tank. Here, the nozzle may be positioned above the first supply line L1.

The bubble line 530 may be divided into two sub-lines 531 and 532, and one divided sub-line 531 may be connected to a lower front end (contact tank) of the floating tank 300. The other sub-line 532 may be connected to the separation tank of the floating tank 300.

The nozzle coupled to the sub-line 532 connected to the separation tank may be installed under the filtration module 400 (membrane structure 430). Air bubbles discharged to the sub-line 532 may be sprayed toward the filtration module 400 (membrane structure 430). Meanwhile, the air bubbles discharged through the subline 532 may be used for backwashing of the filtration module 400 (membrane structure 430).

In FIG. 2, each of the sub-lines 531 and 532 is shown as one, but at least one of the sub-lines 531 and 532 is divided into a line for ozone bubbles and a line for air bubbles. May be.

3 and 4, the operation of the water treatment apparatus described above will be described.

Referring to FIG. 3, since the ship 1 is in operation, the exhaust gas G1 is generated in the ship 1, and the scrubber 3 for processing the exhaust gas G1 is operated. Accordingly, the waste water A discharged from the scrubber 3 may be supplied to the coagulation tank 200 via the blender 100 through the second supply line L2.

On the other hand, the ballast water B may be stored in the ballast water tank 4, or the ballast water tank 4 may be empty. In both cases, ballast water (B) treatment is unnecessary. Therefore, the ballast water (B) is not supplied to the floating tank (300).

That is, when the waste water (A) is supplied to the coagulation tank (200), the ballast water (B) is not supplied to the floating tank (300). To this end, the second supply line L2 for the movement of the waste cleaning water A is open, but the first supply line L1 for the movement of the ballast water B may be blocked. Specifically, the valve of the second supply line L2 is opened, and the valve of the first supply line L1 is closed.

Eventually, the water treatment device treats waste water (A), but does not treat ballast water (B).

The waste cleaning water (A) may be mixed with a chemical in the blender 100 and supplied to the agglomeration tank 200. The raw water tank 10 may be provided on the second supply line L2, but this may be omitted. When the raw water tank 10 is provided on the second supply line L2, a pump P1 for moving the waste cleaning water A from the raw water tank 10 may be provided and operated.

The waste water (A) supplied to the coagulation tank 200 may be purified through the flotation tank 300 or the like.

Air bubbles may be supplied to the floating tank 300. To this end, air may be supplied to the dissolution tank 510. In this case, ozone may not be supplied to the dissolution tank 510, but is not limited thereto, and air and ozone may be supplied together.

Accordingly, the air valve Va for supplying air to the dissolution tank 510 is opened. Further, if necessary, the ozone valve Vo for supplying ozone may be opened or closed.

The water to be treated collected in the separation tank of the floating tank 300 may be discharged as final treated water TW through the filtration module 400. The treated water TW may be collected in the treatment tank 20 or discharged to the sea. On the other hand, a part of the treated water TW may be circulated to the bubble feeder 500, particularly the dissolution tank 510. In this case, the treated water TW may be introduced into the dissolution tank 510 through the circulation line CL.

Referring to FIG. 4, since the ship 1 is at anchor, no flue gas G1 is generated in the ship 1, and the ballast water B is treated through a water treatment device before being discharged to the sea. That is, the ballast water B is supplied to the floating tank 300 through the first supply line L1. The important thing is that the ballast water (B) does not need to be mixed or agglomerated with the chemicals, so it does not pass through the blender 100 or the flocculation tank 200, and is supplied directly to the flotation tank 300.

On the other hand, there is no need to process the flue gas G1 in the vessel 1, and the scrubber 3 also does not operate. Therefore, there is no waste water (A) discharged from the scrubber (3). Alternatively, the scrubber 3 operates, but the cleaning amount is small, and the amount of waste cleaning water A is small, so there is no need to treat it. Therefore, the washed water (A) is not supplied to the coagulation tank (200).

That is, when the ballast water (B) is supplied to the floating tank (300), the waste cleaning water (A) is not supplied to the coagulation tank (200). To this end, the first supply line L1 for the movement of the ballast water B is open, but the second supply line L2 for the movement of the waste cleaning water A may be blocked. Specifically, the valve of the first supply line L1 is opened, and the valve of the second supply line L2 is closed. In addition, when the raw water tank 10 is provided, the operation of the pump P1 for flowing the waste water A from the raw water tank 10 is stopped.

Ballast water (B) is directly supplied to the floating tank (300). The ballast water B may be sterilized through the floating tank 300 or the like.

Ozone bubbles may be supplied to the floating tank 300. That is, ozone may be supplied to the dissolution tank 510. At this time, air may not be supplied to the dissolution tank 510.

Accordingly, the ozone valve Vo for supplying ozone to the dissolution tank 510 is opened. In addition, the air valve Va for supplying air may be closed.

The water to be treated collected in the separation tank of the floating tank 300 may be discharged as final treated water TW through the filtration module 400. The treated water TW may be collected in the treatment tank 20 or discharged to the sea. On the other hand, a part of the treated water TW may be circulated to the bubble feeder 500, particularly the dissolution tank 510. In this case, the treated water TW may be introduced into the dissolution tank 510 through the circulation line CL.

9 to 11 are views showing various bubble feeders 500 of a water treatment apparatus using ozone bubbles according to the present invention.

Referring to FIG. 9, the bubble supplier 500 includes a dissolution tank 510 and a gas supply unit 520, and the gas supply unit 520 includes a compressor 521a, an ozone pressurizer 521b, and an ozone generator 522. It may include.

Referring to FIG. 9A, the air valve Va is opened, and the compressor 521a is operated to provide compressed air to the dissolution tank 510. In this case, air bubbles may be generated and supplied to the floating tank 300. This can be used in the treatment of waste water (A). The ozone valve Vo is shown as closed, but can also be opened together. The opening of the ozone valve Vo may be described with reference to FIG. 9B.

Referring to FIG. 9B, the ozone valve Vo is opened, and ozone generated by the ozone generator 522 may be supplied to the dissolution tank 510 by the ozone pressurizer 521b. The ozone generator 522 may generate ozone from oxygen or air. Accordingly, ozone bubbles may be generated and supplied to the floating tank 300. This can be used in the treatment of ballast water (B). The air valve Va is closed so that air may not be provided to the dissolution tank 510.

Referring to FIG. 10, the compressor 521a and the ozone pressurizer 521b in FIG. 9 may be integrated. The integrated device will be referred to as a compressor 521c for convenience.

Referring to FIG. 10A, as the first valve V1 is opened and the second valve V2 is opened, the compressor 521c is operated and compressed air may be provided to the dissolution tank 510. Referring to FIG. 10(b), the first valve V1 and the second valve V2 are both open to provide ozone generated by the ozone generator 522 to the dissolution tank 510 by the compressor 521c. I can. If necessary, the first valve V1 may be omitted.

Referring to FIG. 11, the bubble supplier 500 may include a dissolution tank 510 and a microbubble pump.

Referring to FIG. 11, a microbubble pump 521d connected to the dissolution tank 510 is installed on the treated water circulation line CL, and receives both treated water TW and gas. The microbubble pump 521d may generate microbubbles by forming a vortex therein.

Referring to FIG. 11(a), ozone is not provided to the microbubble pump 521d, but air is provided. Accordingly, air bubbles may be formed. At this time, the air valve Va is open and the ozone valve Vo may be closed.

Referring to FIG. 11(b), air is not provided to the microbubble pump 521d, but ozone is provided. Accordingly, ozone bubbles may be formed. At this time, the ozone valve Vo may be opened and the air valve Va may be closed.

Referring to FIG. 11(c), the treated water TW _{flows in through the I A} inlet, the gas flows in through the I _B inlet, and micro-bubbles are generated in the micro-bubble pump 521d. Pressurized water including microbubbles can be discharged through the _{O C outlet.}

In addition, any method in which the bubble supplier can selectively provide air bubbles and ozone bubbles can be applied to the present invention.

5 and 6 are views showing a water treatment apparatus using ozone bubbles according to another embodiment of the present invention.

5 and 6, the water treatment apparatus using ozone bubbles may further include a sluice gate 600.

The sluice gate 600 may be installed between the flocculation tank 200 and the flotation tank 300. The sluice gate 600 is installed to move up and down, and the vertical movement of the sluice gate 600 may be performed by the driving unit 610.

When the sluice gate 600 is in a lowered state, the sluice gate 600 is closed, and the water passage between the coagulation tank 200 and the floating tank 300 is closed. When the sluice gate 600 rises, the sluice gate 600 is opened so that the water passage between the coagulation tank 200 and the floating tank 300 is opened. In this case, the water to be treated may move from the coagulation tank 200 to the floating tank 300.

Referring to Figure 5, the waste water (A) is introduced into the coagulation tank 200, there is purification through the floating tank 300, etc., the sluice gate 600 is opened. Accordingly, the waste cleaning water (A) can be moved to the flotation tank 300 after agglomeration in the flocculation tank 200. Here, air bubbles are used, and ozone bubbles may not be used. This is the same as described with reference to FIG. 3.

6, ballast water (B) is introduced into the floating tank 300, and sterilized through the floating tank 300, and the sluice gate 600 is closed. Therefore, the water to be treated in the flocculation tank 200 and the water to be treated in the flotation tank 300 are isolated from each other, and the ballast water B supplied to the flotation tank 300 does not flow back to the flocculation tank 200. I can't. Here, ozone bubbles are used, and air bubbles may not be used. This is the same as described with reference to FIG. 4.

Meanwhile, the above-described valves, pumps, sluice gates, etc. may be automatically operated through the control unit.

7 and 8 are views showing a water treatment apparatus using ozone bubbles according to another embodiment of the present invention.

In FIGS. 7 and 8, the membrane structure 430 may be backwashed. When backwashing of the membrane structure 430 is performed, the operation of the pump P6 is stopped, and therefore, water to be treated may not pass through the membrane structure 430.

Meanwhile, air bubbles or ozone bubbles AB of the bubble line 530 extending from the dissolution tank 510 may be moved to the sub-line 532 connected to the separation tank and discharged to the separation tank. Air bubbles or ozone bubbles AB may contact the membrane of the membrane structure 430. In this case, contaminants attached to the membrane may be separated from the membrane by the action of air bubbles or ozone bubbles (AB). That is, the membrane can be washed. To this end, the nozzle of the subline 532 may be located under the membrane structure 430.

Contaminants generated as a result of washing the membrane structure 430 may be removed by the skimmer 320. For this, air bubbles or ozone bubbles may also be discharged through the sub-line 531. However, the washing of the membrane structure 430 and the operation of the skimmer 320 may be performed simultaneously or sequentially, and there is no limitation thereto.

While the membrane structure 430 is being cleaned, the treatment of the waste cleaning water A and the ballast water B may be stopped. Referring to Figure 7, the second supply line (L2) is closed to stop the supply of waste water (A), the first supply line (L1) is also closed to stop the supply of ballast water (B). Can be.

It can be understood that FIG. 7 corresponds to FIGS. 2 to 4, and FIG. 8 corresponds to FIGS. 5 and 6.

That is, referring to FIG. 8, the sluice gate 600 may be closed while the membrane structure 430 is being washed. Even in this case, the membrane structure 430 may be cleaned in the same manner as in FIG. 7.

On the other hand, the membrane structure 430 may be cleaned by air bubbles or ozone bubbles, but the air bubbles and ozone bubbles need not be used together as shown in FIG. 7. For example, only air bubbles may be used as shown in FIG. 8.

When washing of the membrane structure 430 is completed, the first supply line L1 and the second supply line L2 are normally opened, so that the above-described water treatment process can be performed normally.

The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the scope of protection of the present invention may not be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.

1: ship
2: engine
3: scrubber
4: ballast water tank
L1: first supply line
L2: 2nd supply line
GL: flue gas line
SL: seawater line
TL: treated water line
10: original water tank
20: treatment tank
100: blender
200: flocculation tank
300: Injury Team
400: filtration module
500: bubble feeder
510: melting tank
520: gas supply unit
600: sluice gate

Claims (7)

A flocculation tank installed on the ship;
A floating tank provided at the rear end of the coagulation tank;
A first supply line for supplying ballast water from the ballast water tank of the ship to the floating tank;
A second supply line for supplying waste water generated from the scrubber installed on the ship to the coagulation tank; And
It includes a bubble supplier for supplying bubbles to the floating tank,
When ballast water is supplied to the floating tank, the bubble supplier supplies ozone bubbles,
Water treatment device using ozone bubbles. The method of claim 1,
When ballast water is supplied to the floating tank,
The second supply line is blocked,
When waste water is supplied to the coagulation tank,
The first supply line is blocked,
Water treatment device using ozone bubbles. The method of claim 2,
When waste water is supplied to the coagulation tank,
The bubble supplier supplies air bubbles,
Water treatment device using ozone bubbles. The method of claim 2,
The bubble supplier includes a dissolution tank,
When ballast water flows into the floating tank, ozone is supplied to the dissolution tank,
When waste water is introduced into the coagulation tank, air is supplied to the dissolution tank,
Water treatment device using ozone bubbles. The method of claim 2,
Further comprising a sluice gate installed between the coagulation tank and the floating tank,
When waste washing water flows into the coagulation tank, the sluice gate is opened,
When ballast water flows into the floating tank, the sluice gate is closed,
Water treatment device using ozone bubbles. The method of claim 1,
Further comprising a filtration module installed in the floating tank,
Ballast water or waste washing water accommodated in the floating tank is discharged to the outside through the filtration module,
Water treatment device using ozone bubbles. The method of claim 6,
The bubble feeder supplies bubbles to the filtration module side,
Water treatment device using ozone bubbles.

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