KR101816807B1 - The apparatus of treating ballast water comprising the scale removing system - Google Patents

Abstract

The present invention relates to a sterilization treatment section for sterilizing ballast water of a ship, and a scale removal system for a ballast water treatment apparatus for supplying scale removal water to a sterilization treatment section so as to remove scale generated in the sterilization treatment section.
The ballast water treatment apparatus according to the present invention is equipped with a scale removal system to remove the scale in the electrolyzer. Particularly, when the electrolyzer is not operated, the scale can be removed, The electrolysis efficiency can be kept low even when operated for a long period of time.

Description

TECHNICAL FIELD [0001] The present invention relates to a ballast water treatment apparatus having a scale removal system,

The present invention relates to a ballast water treatment system, and more particularly, to a ballast water treatment system equipped with a system capable of removing scale generated in an electrolytic bath and a UV lamp.

In general, ships use ballast tanks for the stability and efficiency of propulsion when they are not loaded with cargo. In order to reduce the center of gravity of the ship due to loading and unloading of cargo, To control the flow of ballast water.

Recently, ballast water has been used as a medium for propagating organisms or pathogens in a specific sea area to other seas, and it has become necessary to sterilize ballast water.

Methods of cleaning and sterilizing ballast water have been developed in a variety of ways. Among these methods, sodium hypochlorite is produced by electrolysis of seawater, and a method of treating ballast water using the method and a method of sterilizing by using ultraviolet rays from UV lamp This is the main method.

However, when such an electrolysis method and a UV method are used, a scale is generated by a plurality of ions contained in seawater. Such scale generation reduces the electrolytic efficiency of the electrolytic cell and decreases the ultraviolet transmission efficiency of the UV lamp .

US Patent No. 7,244,348

The object of the present invention is to provide a ballast water treatment apparatus for solving the problem that scale is generated in the electrolytic bath electrode and the UV lamp as the use time increases in the conventional ballast water treatment system, and electrolysis efficiency and ultraviolet ray transmission efficiency are inferior have.

As a means for solving the above problems, there is provided a scale removal system for a ballast water treatment apparatus for supplying a scale removal water to a sterilizing treatment section so as to remove a scale generated in a sterilizing treatment section and a sterilization treatment section for sterilizing a ballast water of a ship.

At this time, the sterilizing unit may be configured to be sterilized by various methods such as electrolysis and UV, and may include one or more sterilization methods.

On the other hand, the sterilizing treatment unit may be configured to supply scale-removing water to the electrolytic cell to electrolyze the salt water to produce a sterilizing agent, and to remove scale, which is a by-product generated during electrolysis, in the electrolytic bath.

The electrolytic cell for electrolysis may be installed in the main piping to which the ballast water is conveyed or in the side stream piping branched from the main piping. At this time, the scale removal system may be provided on the circulation path including the electrolytic bath.

At this time, the descale system may be configured to introduce descale water to the electrolytic cell after the electrolysis termination.

Further, the descale system can be configured so that descale water circulates through the electrolyzer.

And, the scale removal system can fill the electrolytic cell with the scale removal water after the ballasting that the seawater is introduced into the ballast tank is finished.

On the other hand, the scale includes a magnesium compound and a calcium compound as electrolysis by-products of the brine, and the scale-removing water can be composed of an acidic substance so as to dissolve the magnesium compound and the calcium compound.

In addition, the descaler may comprise citric acid.

Separately, the scale removal system may further comprise a neutralizing agent supply unit configured to supply a neutralizing agent generated from the electrolytic cell and neutralizing the sterilizing agent remaining in the electrolytic bath.

Further, the scale removal system may include: a scale removal water tank in which the scale removal water is stored; And a connection pipe for connecting the front or rear end of the electrolytic cell and the descaling water tank.

At this time, the electrolytic cell is installed in the side stream piping branched from the main pipeline where the collected seawater moves to the ballast tank, and the connecting piping is connected to the front or rear point of the electrolytic cell on the side stream piping and the descaling water tank respectively .

Meanwhile, the ballast water treatment system may further include a fastening part provided on the connection pipe and configured so that the connection pipe can be detachably attached to the side stream pipe.

The descale system may further include a vent line 170 configured to discharge the gas inside the descale water tank to the outside.

The ballast water treatment apparatus according to the present invention is equipped with a scale removal system to remove the scale in the electrolyzer. Particularly, when the electrolyzer is not operated, the scale can be removed, The electrolysis efficiency can be kept low even when operated for a long period of time.

1 is a conceptual diagram of a ballast water treatment apparatus according to the present invention.
2 is a conceptual diagram of a first embodiment according to the present invention.
3 is a conceptual diagram of a second embodiment according to the present invention.
4 is a conceptual diagram of a third embodiment according to the present invention.
5 is a conceptual diagram of a fourth embodiment according to the present invention.
6 is a conceptual diagram of a direct electrolysis type embodiment.
Fig. 7 is a conceptual diagram of an embodiment in which the sterilization treatment section is constructed in the UV mode.

Hereinafter, a ballast water treatment apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the embodiments, the names of the respective components may be referred to as other names in the art. However, if there is a functional similarity and an equivalence thereof, the modified structure can be regarded as an equivalent structure. In addition, reference numerals added to respective components are described for convenience of explanation. However, the contents of the drawings in the drawings in which these symbols are described do not limit the respective components to the ranges within the drawings. Likewise, even if the embodiment in which the structure on the drawing is partially modified is employed, it can be regarded as an equivalent structure if there is functional similarity and uniformity. Further, in view of the level of ordinary skill in the art, if it is recognized as a component to be included, a description thereof will be omitted.

1 is a conceptual diagram of a ballast water treatment apparatus according to the present invention.

In this embodiment, the sterilizing treatment section is of the indirect electrolysis type, and the other types will be described later.

As shown in the figure, the ballast water treatment apparatus includes a ballast pump 10, a main piping 30, a side stream piping 31, an electrolytic bath 40, a ballast tank 50, a sensor 60, A neutralization system 70, and a descale system 100. [ The ballast water treatment apparatus is provided on the ship for physically or chemically treating the ballast water treatment apparatus accommodated in the ballast tank (50) of the ship.

The ballast pump 10 supplies water to be contained in the ballast tank 50 from the outside of the ship. At this time, the water flowing into the inside of the ship may be seawater when the ship is operated from the sea, or may be the nose when operating from the river.

The ballast tank 50 is a space for receiving the ballast water introduced into the ship, and may be provided in various numbers depending on the type of the ship, and may be provided at various positions.

The main piping 30 is a path for moving the ballast water introduced into the ship by the ballast pump 10 to the ballast tank 50. And the ballast water is moved to the plurality of ballast tanks 50 through the main pipe 30. Meanwhile, the main pipe 30 may be provided with a flow meter (not shown) for measuring the flow rate of the ballast water flowing in the pipe.

Meanwhile, since the ballast pump 10, the ballast tank 50, and the main pipe 30 described above are widely practiced in existing ships, the detailed description of the construction will be omitted.

The pretreatment unit 20 is configured to primarily purify the brine introduced into the ship. Filter, and can be configured to physically process it. At this time, the filter is configured to be backwashable and can be continuously operated.

The electrolytic bath 40 is supplied with electric power to electrolyze the brine, and various materials including sodium hypochlorite, which is a sterilizing agent, are generated from the brine. The electrolytic bath 40 may be composed of a plurality of electrolytic baths depending on the configuration of the system, and may be provided in the side stream piping 31 side in series or in parallel.

The sensor 60 is used to measure the concentration of sterilizing agent produced in the electrolytic cell 40 during ballasting and to adjust the concentration to a suitable concentration in the ballast tank 50 so that it can be sterilized. The concentration of the sterilizing agent may be measured in the side stream piping 31 after passing through the electrolytic bath 40 or the concentration of the sterilizing agent may be measured at a point after the side stream piping 31 and the main piping 30 are joined .

D-ballasting refers to the process of discharging the ballast water contained in the ballast tank 50 to the outside of the hull. In the de-ballasting, the ballast pump 10 used in ballasting is used, but the flow of the ballast water is changed and discharged to the outside of the hull. At this time, the flow path can be changed by controlling a plurality of valves or pumps.

On the other hand, DE-BALLASTING should discharge the TRO (Total Residual Oxidant) value below a certain level to the standard applied in the area where the ballast water is discharged.

Since the sodium hypochlorite is toxic as a disinfectant, the neutralization system 70 is configured to neutralize and discharge the sodium hypochlorite. The neutralization system 70 may comprise a neutralizer tank, a neutralizer feed pump, and a valve. The concentration of sodium hypochlorite is measured from the sensor 60 and the pump and the valve are controlled so as to be discharged to a predetermined concentration or lower in the ballast water so that the neutralizing agent is injected into the ballast water during the de-ballasting.

The sensor 60 described above can be configured to measure the concentration of the biocidal agent in the de-ballasting. The neutralization system 70 may be configured to control the amount of neutralizing agent input using the measured value from the sensor 60. Such a sensor 60 may be constructed in an electrically and chemically manner.

The descaling system 100 is configured to remove compounds that are generated as byproducts when electrolyzing the salt water in the electrolytic bath 40. The scale removal system 100 is configured to remove by-products, including scale, attached to the electrodes in the electrolytic bath 40 and attached to the electrodes. As a by-product of electrolysis, a scale including a magnesium compound and a calcium compound is generated in the cathode of the electrolytic bath 40. As the use time of the electrolytic cell increases, the amount of scale generated on the surface of the electrode increases and the contact area with the seawater gradually decreases. Therefore, in order to maintain the efficiency of the electrolytic bath 40, such a scale must be efficiently removed. Hereinafter, the scale removal system 100 will be described in detail with reference to FIGS. 2 to 5. FIG.

2 is a conceptual diagram of a first embodiment according to the present invention.

As shown, the scale removal system 100 may include a scale removal water tank 110, connection pipes 121 and 122, a neutralizer supply unit 150, and a control unit.

The scale removal water tank 110 is configured to store the scale removal number. The scale removal water tank 110 corresponds to a space in which the scale removal water is stored before being supplied into the electrolytic bath 40. The descale water tank 110 can store descale water dissolved in the liquid, and the scale descaling agent can be separately stored in the tank, and then dissolved in the tank to produce a liquid state. At this time, an acidic solution such as citric acid, hydrochloric acid, sulfuric acid and the like may be used as the scale remover.

Here, the scale-removing water may be an acidic substance so that it can be dissolved in a neutralization reaction with a magnesium compound and a calcium compound. At this time, the acidity of the scale-removed water may be variously adopted, but it may be configured to have a pH of 4 or less in consideration of a decrease in concentration due to seawater remaining in the electrolytic bath 40 or the like.

The connection lines 121 and 122 connect each other so that the descale water tank 110 and the electrolytic bath 40 can be in fluid communication. The connection pipes 121 and 122 are configured to connect the front end of the electrolytic bath 40 and the descaler water tank 110 of the side stream piping 31 or to connect the rear end of the electrolytic bath 40 and the descaling water tank 110 . In this case, when the scale removal number is circulated as described later, one of the connection pipes 121 and 122 is disposed in the descale tank (or the scale removal tank) so that the side stream pump 33 can be positioned on the circulation path 110) and the main piping and the site stream pump.

Meanwhile, the materials of the scale removal water tank 110 and the connection pipes 121 and 122 may be made of a corrosion-resistant material to prevent corrosion due to an acidic scale remover.

The neutralizing agent supplying unit 150 is configured to supply a neutralizing agent capable of neutralizing the sterilizing agent remaining in the electrolytic bath 40 or the piping after the electrolysis in the electrolytic bath 40 is completed. If the neutralizing agent is discharged to the outside through the same piping in the case of de-balusting after electrolysis, it is discharged together with the remaining disinfecting agent and there is a possibility of environmental pollution. Therefore, the neutralizing agent is neutralized and discharged when the dewatering is performed . At this time, the neutralizing agent supply unit 150 may be connected to the neutralization system 70 to receive the neutralizing agent. Meanwhile, although the neutralizing agent supplying unit 150 is separately provided, the neutralizing agent supplying unit 150 can be directly supplied to the scale removing water tank and can be supplied together with the scale removing agent during circulation.

The control unit may be configured to control the overall operation of the descaling system 100, such as the state of the descale number, the amount of de-scaling agent stored, the circulated flow rate of the de-scaled number, and the like.

The control unit can control to operate the descaling system 100 when the electrolytic bath 40 is not operated at the end of the ballasting. It is also possible to control the scale removal system 100 to fill the electrolytic bath 40 with scale-removed water after the ballasting of the seawater into the ballast tank is completed. Specifically, the valves provided in the inlet and outlet of the side stream piping 31 are shut off, and valves, pumps, and the like can be controlled so that the scale removal water can circulate through the scale removal water tank 110 and the electrolytic bath 40 have. At this time, the valves provided in the connection pipes 121 and 122 may be opened to circulate the scale removal water. At this time, the circulation direction can be reversely controlled in order to efficiently perform scale removal and peeling. In addition, the control unit can control the pump and the like so that the scale removal number can be filled in the electrolytic bath 40 without circulating.

The scale removal system may be configured to operate for a certain period of time after ballasting using a scale removal number of a predetermined concentration or more. At this time, the fluid containing the descaler may be acidic with a pH of 4 or less, but it may be selected considering the prevention of damage to the electrolytic apparatus and other equipment. When supplied with such an acidity, the scale of the electrolytic cell can be sufficiently removed when supplied to the electrolytic cell. The concentration of the scale-removing water can be selected to be a concentration that can satisfy the above-described acidity, and can be 2% or more when citric acid is used as a descaler.

The amount supplied to the electrolyzer side in the descaling system is selected in such an amount as to fill the electrolyzer. The sizes of the electrolytic baths provided to the vessel are different from each other, so that they can be determined based on the size of the electrolytic bath and the piping connected to the electrolytic bath without inputting them in a specific amount. At this time, as described above, the acidity of the scale-removing water is kept at pH 4 or less and filled in the electrolytic cell. On the other hand, since the remaining salt water is present in the electrolytic cell, the concentration of the scale remover is adjusted so that the pH of the salt is lowered to 4 or less even if the remaining scale of the salt and the scale removing agent are combined.

The descale system can be configured such that descale water enters the electrolyzer for a predetermined time after the end of the electrolysis. At this time, when the scale removal water is filled in the electrolytic tank, the circulation and the inflow of the scale removal water can be controlled to be stopped when the acidity of the scale removal water returning to the tank becomes less than pH 4.

3 is a conceptual diagram of a second embodiment according to the present invention.

The present embodiment may be configured to include the same constituent elements as those of the first embodiment described above, and the additional or omitted constituent elements will not be described in order to avoid redundant description.

As shown in the drawing, in this embodiment, a configuration in which the agitator 140 is included in the scale removal water tank 110 is shown. In this way, it is possible to produce a scale removal water or to mix well the substances stored at the time of storage.

4 is a conceptual diagram of a third embodiment according to the present invention.

In this embodiment, the components that differ from the second embodiment will be described. In this embodiment, the connection pipes 121 and 122 for introducing the descale water into the electrolytic bath 40 are connected between the side stream pump 33 and the electrolytic bath 40 in the side stream piping 31, A pump 130 is provided. In such a case, the scale removal water is supplied to the electrolytic bath 40 using a separate circulation pump 130 and operated independently, thereby enhancing the stability of the system.

5 is a conceptual diagram of a fourth embodiment according to the present invention.

As shown, the connection piping 121 and 122 are provided with fastening portions 160 and may be configured such that the descaling system 100 can be connected to the flow path on the side stream. This arrangement facilitates installation in an existing ballast water treatment system and facilitates maintenance of the scale removal system 100 because of easy separation.

A vent line 170 may also be provided to evacuate gases that may occur during scale removal, or gases that may be generated in the tank.

As described above, the ballast water treatment apparatus according to the present invention is configured to remove the scale in the electrolytic bath 40, and in particular, to remove the scale when the electrolytic bath 40 does not operate, The efficiency can be increased, and the electrolysis efficiency can be kept low even when operated for a long period of time.

6 is a conceptual diagram of a direct electrolysis type embodiment.

The present embodiment can also include the same constituent elements as those of the above-described embodiment, and a description thereof will be omitted in order to avoid redundant description.

Fig. 6 (a) is a conceptual diagram showing the valve control and the movement of salt water during ballasting. As shown in the figure, in the direct electrolysis type electrolytic bath, the electrolytic bath is provided in the main pipe unlike the first embodiment. In this case, since the separate side stream piping is not installed, the descaling system can be directly connected to the main piping. On the other hand, when balancing, the scale removal system can be set not to operate.

Fig. 6 (b) is a conceptual diagram of the case where the ballasting is stopped and the descaling system operates. Since the scale removal system is connected to the front end and the rear end of the electrolytic bath in the main piping, the scale removal water can be configured to circulate through the electrolytic bath. The scale removal number can be removed on the surface of the electrode by reacting with the scale attached to the electrode as described in the previous embodiment. On the other hand, a plurality of valves can be controlled so as to form a circulation line by controlling the valves of the main piping so that the descale can be circulated. However, such control of the valve is a widely used technique, so that detailed description will be omitted.

  Fig. 7 is a conceptual diagram of an embodiment in which the sterilization treatment section is constructed in the UV mode. The present embodiment can also include the same constituent elements as those of the above-described embodiment, and a description thereof will be omitted in order to avoid redundant description.

In this embodiment, a scale removal system applied to a sterilization treatment method using UV, which is not an electrolytic bath used in an electrolysis type, is shown. Scattering may occur on the surface of the lamp even when sterilized by irradiating UV to the main pipe. Particularly, in the case of UV, when the scale is fixed on the surface of the lamp, the route of irradiation of the ultraviolet rays to the salt water is blocked, so that the sterilization efficiency can be drastically reduced.

7 (a) and 7 (b), the scale removing system is connected to the front and rear ends of the UV irradiating unit 45 on the main pipe so that the scale can be removed, even when the UV irradiating unit 45 is provided, ) Can be formed. Unlike the previous embodiment, the scale removal system does not require a neutralizer, so it is not connected to the neutralization system, and a neutralizer supply unit may not be provided.

Meanwhile, although not shown, the sterilizing unit may be constructed so that an electrolytic method and a UV method can be used in combination. In such a case, the scale removing system may be connected to each element constituting the disinfection processing unit so that the scale can be removed. At this time, a plurality of valves can be controlled so as to form or shut off the circulation line as in the above-described embodiment.

10: Ballast pump
20:
30: Main piping
31: Side stream piping
32: Valve
33: Side stream pump
40: electrolytic cell
45: UV irradiation unit
50: Ballast tank
60: Sensor
70: Neutralizing system
100: Scale removal system
110: Scale removal water tank
121, 122: Connection piping
130: circulation pump
140: stirrer
150:
160:
170: vent line

Claims (14)

Scale water containing citric acid is supplied to the electrolytic bath so as to remove a scale generated in the electrode of the electrolytic bath installed in the side stream piping branched from the main piping where the taken sea water moves to the ballast tank,
A scale removal water tank in which the scale removal number is stored; And
And a connection pipe connecting the front end and the rear end of the electrolytic cell to the descaling water tank,
Wherein the scale removal water is filled in the electrolytic bath when the balusting for introducing seawater into the ballast tank is terminated or stopped and the scale removal water is circulated through the electrolytic bath,
Wherein the scale removal number includes a neutralizing agent so as to neutralize the germicide generated in the electrolytic bath at the time of scale removal. delete delete delete delete The method according to claim 1,
Wherein said scale comprises a magnesium compound and a calcium compound as electrolysis by-products of brine. delete The method according to claim 6,
The descaling system comprises:
Further comprising a neutralizing agent supply unit configured to supply the neutralizing agent. delete delete delete The method according to claim 1,
Further comprising a fastening portion provided on the connection pipe and configured to be detachably attachable to the side stream pipe of the connection pipe. 9. The method of claim 8,
The descaling system comprises:
And a vent line configured to discharge the gas inside the scale removal water tank to the outside. delete

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