KR20140014888A - Ship ballast water treatment device having metal ion generator - Google Patents

Abstract

Disclosed is a ship ballast water treatment device applied with a metal ion generator. According to a ship ballast water treatment device which treats seawater and stores as the ballast water, the ship ballast water treatment device comprises: an inflow pump for introducing a part of the seawater at the upstream part of a main pipe where the sea water is flowing; an electrolysis chamber which produces hypochlorous acid by electrolyzing the seawater flowing by the inflow pump and which discharges the firstly processed water containing the hypochlorous acid; a metal ion generator which is connected to the rear end of the electrolysis chamber for discharging, to the main pipe, the secondly processed water containing metal ions which are generated by the electrolysis; a rectification part for supplying electricity to the metal ion generator and electrolysis chamber; and a control unit for controlling the current being supplied to the electrolysis chamber and metal ion generator. [Reference numerals] (AA) Carp; (BB) Trout; (CC) Lichen(Oyster); (DD) Water flea; (EE) over 0.016ppm(16ppb); (FF) over 0.015ppm(15ppb); (GG,HH) over 0.010ppm(10ppb)

Description

Technical Field [0001] The present invention relates to a ship ballast water treatment device having a metal ion generator,

The present invention relates to a ship ballast water treatment apparatus to which a metal ion generating apparatus is applied.

For large vessels such as tankers, container ships or LNG carriers, ballast tanks are provided inside the vessel as a means of ensuring the stability and balance of the vessel. (Or ballast water), which is used to balance the balance of the ship, is called a ballast water (also referred to as ballast water) . In other words, in case the cargo is unloaded, the ballast water is allowed to flow into the ballast tank, and when the cargo is loaded, the ballast water stored in the ballast tank is discharged so that the balance of the ship can be balanced.

On the other hand, vessels storing ballast water may discharge seawater from a first country to the marine environment of a second country in another marine environment. Since ballast water is seawater in the inflow area, ballast water includes microorganisms such as plankton, bacteria and the like, which are contained in seawater. In the event that ballast water from a first country is discharged into the ocean of a second country in a completely different environment, various foreign substances or microbes and bacteria or other organic substances of the first country may cause a change in the marine ecosystem of the second country Danger may occur.

Accordingly, the International Maritime Organization (IMO) has established the Convention on the Management of Ballast Water in 2004 for the purpose of preventing the movement of harmful species between countries. In order to control the release of harmful species, The exchange standard (D-1) and the processing standard (D-2) were enacted and made mandatory. Among them, the exchange of ballast water should be done in the ocean, and it causes the safety problem of the ship. Therefore, it is becoming more and more necessary to sterilize the ballast water instead of exchanging the ballast water. The Convention is underway to develop ballast water treatment systems for shipbuilding in all countries, since it will take effect one year from the time when the ship is approved by more than 30 countries.

Conventional ballast water treatment apparatuses dealt with ballast water as disclosed in Korean Patent Laid-Open No. 10-2010-0017994 and dehalogenates the ballast water before discharge of the ballast water from the ship.

Among the existing disinfection systems, the electrolysis method, which is widely applied to the ballast water treatment system, utilizes the principle of generating hypochlorous acid which is a powerful oxidizer in the electrolysis tank to kill the organisms. This method is different from ultraviolet (UV) or ozone sterilization, because hypochlorous acid is persistent and can be continuously sterilized.

However, hypochlorous acid is volatile and is depleted within hours or days depending on the concentration of the hypochlorous acid. After hypochlorous acid is depleted, some microbes are regenerated, and when ballast water is discharged after long-term voyage, it may not meet the intended sterilization effect at the time of initial introduction.

Therefore, in order to extend the period of residual hypochlorous acid, hypochlorous acid is initially injected at a higher concentration. However, carcinogenic substances such as trihalomethane and haloacetic acid are also added in proportion to the concentration of hypochlorous acid generated in the electrolysis of seawater There is a limitation in increasing the concentration of hypochlorous acid indefinitely.

In addition, when the ballast water is discharged, electrolysis may be once again performed to re-inject hypochlorous acid. However, in this case, additional power for operating the electrolysis tank is consumed, and after the hypochlorous acid re- It is troublesome to inject an excessive amount of neutralizing agent such as sodium thiosulfate again for several seconds after the discharge.

As a result, hypochlorous acid has excellent sterilization performance but it has limit of persistence.

Korean Patent Laid-Open Publication No. 10-2010-0105646 discloses an apparatus and a method for treating ballast water through ultraviolet irradiation. However, since a separate ultraviolet irradiation apparatus needs to be installed, a separate installation space is required, There is also a troublesome problem.

Korean Patent Publication No. 10-2010-0017994 Korean Patent Publication No. 10-2010-0105646

(For example, copper and / or silver ions) are generated from raw water (seawater) in a ship ballast water treatment apparatus adopting a residual chlorine disinfection method through electrolysis or drug injection, and then injected into ship equilibrium water And to provide a ship ballast water treatment apparatus employing a metal ion generating apparatus that compensates for the maintenance of the sterilization state until immediately before discharge.

An object of the present invention is to provide a ship ballast water treatment apparatus using a metal ion generating apparatus which is advantageous in terms of installation and cost by sharing an existing electrolytic tank and auxiliary facilities as an auxiliary means of a sterilizing apparatus using hypochlorous acid.

Other objects of the present invention will become readily apparent from the following description.

According to an aspect of the present invention, there is provided a ship ballast water treatment apparatus for treating sea water introduced from the outside of a ship and storing the seawater into ballast tanks as ship ballast water, wherein a part of the seawater is introduced An inflow pump; An electrolysis tank for electrolyzing the seawater introduced by the inflow pump to generate hypochlorous acid and to discharge the primary treated water containing the hypochlorous acid; A metal ion generator connected to a downstream end of the electrolytic bath for discharging secondary treatment water containing metal ions generated by electrolyzing the primary treatment water to the main pipe; A rectifying unit for supplying a current to the electrolytic bath and the metal ion generating unit; And a control unit for controlling a current supplied from the rectifying unit to the electrolytic bath and the metal ion generating unit.

Further comprising a measurement unit installed in the main pipe for measuring at least one concentration of hypochlorous acid concentration and metal ion concentration of the ship equilibrium water, wherein the control unit calculates the hypochlorous acid concentration and the metal ion concentration It is possible to control the current value supplied to at least one of the electrolytic bath and the metal ion generating unit in the rectifying unit.

According to another aspect of the present invention, there is provided a ship ballast water treatment apparatus for treating seawater introduced from the outside of a ship and storing the seawater into equilibrium water in a ballast tank, wherein the medicament having a sterilizing effect is injected into the main plumbing A drug injection part; A metal ion implantation unit for introducing a part of the seawater at a point upstream of the main pipeline and re-injecting the generated metal ions into the main pipeline by electrolysis; And a control unit for controlling at least one of the amount of the chemical injected from the chemical injecting unit and the amount of metal ions generated in the metal ion injecting unit.

The medicament may include one or a combination of one or more of chlorine-based substances, Peraclean, vitamin K3 and ferrate ion.

The metal ion implantation unit may include an inflow pump for introducing a part of the seawater at a point upstream of the main pipeline; A metal ion generating unit for electrolyzing the seawater introduced by the inflow pump to generate metal ions and discharge the metal ions to the main pipe; And a rectifying unit for supplying a current to the metal ion generating unit, wherein the control unit can control a current supplied to the metal ion generating unit in the rectifying unit.

The metal ion generating part may include an electrode part made of at least one of copper and silver or an alloy containing copper and silver.

The metal ion generating part includes electrode parts divided into a plurality of layers, and the electrode parts of each layer may have a shape in which one or more metal plates are arranged in parallel with each other.

The metal ion generating part may be arranged in a zigzag manner in interlayer connection holes connected from the lower layer to the upper layer.

Further comprising a measurement unit installed in the main pipe for measuring a concentration of at least one of a chemical concentration and a metal ion concentration of the ballast water, wherein the control unit calculates the concentration of the chemical in the ballast water based on the chemical concentration and the metal ion concentration So that the current value supplied to the metal ion generating section in the rectifying section can be controlled.

And a gas-liquid separator connected to a rear end of the metal-ion generating unit and allowing only a liquid component, which is a by-product generated in the metal-ion generating unit, to be separated from the gas component, to be injected into the main pipe.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiment of the present invention, metal ions (for example, copper and / or silver ions) are generated from raw water (seawater) in a ship ballast water treatment apparatus adopting a residual chlorine sterilization method through electrolysis or drug injection, It is effective to compensate for the maintenance of the sterilization state just before discharge.

In addition, as an auxiliary means of the sterilization apparatus using hypochlorous acid, it is advantageous in terms of installation and economical efficiency by sharing the existing electrolytic tank and auxiliary facilities.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual view of a ship ballast water treatment apparatus to which a metal ion generating apparatus according to an embodiment of the present invention is applied;
Figure 2 is a table showing the concentration of copper ions affecting survival of species,
3 is a diagram illustrating a configuration of a metal ion generating unit according to an embodiment of the present invention.
4 is a view showing a concept of a ship ballast water treatment apparatus to which a metal ion generating apparatus according to another embodiment of the present invention is applied.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It is to be understood that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is a view showing a concept of a ship ballast water treatment apparatus to which a metal ion generating apparatus according to an embodiment of the present invention is applied, and FIG. 2 is a table showing the concentrations of copper ions affecting the survival of species.

1, a ship ballast water treatment apparatus 100 includes a main pipe 50, an inflow pump 110, an electrolytic bath 120, a metal ion generator 130, a rectifier 140, a controller 150 And a gas-liquid separator 160 are shown.

The ship water ballast water treatment apparatus 100 according to an embodiment of the present invention performs disinfection of ship ballast water by using residual chlorine generated by an electrolysis method with respect to the side stream to which a part of the flow is branched in the main stream, Ions can be additionally generated to reduce the load on the electrolytic bath while maintaining a high sterilizing power until discharge of the ballast water.

The apparatus for treating ballast water according to one embodiment of the present invention includes an inlet pump 110, an electrolytic bath 120, a metal ion generator 130, a rectifier 140, a controller 150, (160).

The ship ballast water treatment apparatus 100 is connected between a ballast tank and a sea chest, and has a main piping 50 as a main path through which seawater (raw water) outside the ship flows into a ballast tank inside the ship have.

Hereinafter, the flow of ship equilibrium water along the main pipe 50 is referred to as the main stream. In this specification, a description will be made assuming that the sea chest is upstream of the main stream and the ballast tank is downstream of the main stream.

The inflow pump 110 pumps seawater near the upstream point of the main line 50 and allows some of the main stream of seawater to flow into the electrolysis tank 120 as a sidestream through the inflow line.

An electrolytic bath 120 is disposed downstream of the inflow pump 110.

The electrolytic bath 120 electrolyzes the raw water, that is, the sidestream, drawn through the inlet pipe by the inflow pump 110 to generate hypochlorous acid (HClO) corresponding to the sterilizing material. Hypochlorous acid corresponds to residual chlorine, which kills sterilization target substances (e. G., Phytoplankton, bacteria, etc.) in ballast water.

In this process, the electrolytic bath 120 can change the concentration of the sterilizing liquid by changing the amount of hypochlorous acid produced according to the current value supplied from the rectifying unit 140.

The electrolytic bath 120 includes an electrode part made of, for example, a metal titanium electrode. Hypochlorous acid is produced in the anode through an electrolysis process using current supplied from the rectifying part 140, and in the anode, Hydrogen (H ₂ ) and chlorine gas (Cl ₂ ), which are irrelevant byproducts, are produced.

The concentration of hypochlorous acid has a predetermined correlation with a current value applied to the side stream in the electrolytic bath 120. The correlation between the current value and the concentration of hypochlorous acid produced may be, for example, in the form of a table or a functional formula (e.g., a linear function such as y = ax where y is the hypochlorous acid concentration, x is the current value, A proportional constant), and may be stored in the controller 150.

That is, the control unit 150 generates and outputs a control signal based on the correlation between the stored current value and the concentration of hypochlorous acid, thereby controlling the current value supplied from the rectifying unit 140 to the electrolytic bath 120 So that the amount of hypochlorous acid produced through electrolysis can be controlled.

The metal ion generating unit 130 is disposed at the rear end of the electrolytic bath 120.

After the hypochlorous acid is produced by the electrolysis in the electrolytic bath 120, the primary treated water containing hypochlorous acid (see 1 in Fig. 1) is transferred to the metal ion generating unit 130.

The metal ion generating unit 130 corresponds to an auxiliary processing unit in the present embodiment and may be smaller in size than, for example, the electrolytic bath 120 in the preceding stage.

The metal ion generating unit 130 generates metal ions in an electrolytic manner to be included in the primary treated water containing hypochlorous acid, so that the ballast water is continuously treated in the water without volatility during the period of storage in the ballast tank after the ballast water is water- So that the sterilizing effect can be maintained.

In other words, when the residual chlorine sterilization method is adopted by using the existing electrolysis method, the sterilizing material (hypochlorous acid) has partial residual, but does not guarantee the persistence enough to maintain the sterilization state until the discharge of the ballast water As a complementary method to the ship ballast water treatment system, a sterilization method using metal ions is additionally applied.

Sterilization by metal ions has been applied in an empirical manner, for example, to prevent contamination of water from ancient times, for example by using copper or silver in water to maintain water freshness.

When a metal is used as an electrode and a direct current is passed through it, metal ions are generated at the anode. The metal ion is positively charged, and is electrostatically adsorbed on the cell wall of the negatively charged microorganism (the microorganism to be sterilized in the present invention).

Adsorbed metal ions prevent microbial cells from taking organic matter or nutrients into the cell wall. For example, in the case of silver ions, it binds to DNA and RNA, cell proteins, respiratory enzymes, etc., and inhibits cell activity. As a result, cell proliferation is inhibited and cell itself can not survive.

The disinfection power of these metal ions is in the order of silver> mercury> copper> cadmium> chromium> nickel> lead> cobalt> zinc> iron> calcium, among which copper and silver are less toxic and excellent in sterilizing power.

Copper ions are particularly effective in maintaining the killing and sterilization of pathogens and viruses and affect the survival of each species at the concentrations shown in Fig.

Referring to Figure 2, the copper ion concentration that affects the survival of species is illustrated (Source: Environmental Engineering Glossary, Environmental Glossary).

In an environment with a copper ion concentration of more than 0.016ppm (16ppb) for carp, greater than 0.015ppm (15ppb) for acid fish, and greater than 0.010ppm (10ppb) for petrification and daphnia, .

That is, for living organisms having a large size, their survival is affected in an environment having a copper ion concentration of about 10 ppb or more. However, in the case of microorganisms such as bacteria and viruses, It is possible to maintain sterilization condition.

In addition, since the copper ion sterilization concentration is not much lower than the drinking water quality standard of 1.0 ppm (Seoul Institute of Health and Environment, EPA), it will not cause adverse effects on the environment.

In addition, in the case of silver, in addition to the above-mentioned sterilization effect, silver ions generated in the anode when electrolyzing are converted into active oxygen in the water and indirectly sterilizing ability to inactivate the microorganisms due to the active oxygen.

Accordingly, the metal ion generating part 130 may include an electrode part made of one or more metals of silver, mercury, copper, cadmium, chromium, nickel, lead, cobalt, zinc, iron, calcium and the like or an alloy thereof. Hereinafter, it will be assumed that an electrode including at least one of copper and silver or an alloy containing copper and silver, which is less toxic and has excellent sterilizing power, is used as an electrode portion, and detailed structure such as electrode arrangement of the metal ion generating portion 130 Will be described later with reference to the related drawings.

The metal ion generating part 130 includes an electrode part made of a metal electrode (a copper electrode, a silver electrode or a copper / silver alloy electrode), and the metal ion generated in the anode (Cu ^{2 +} , Cu ⁺ , Ag ^+, etc.) are included in the primary treatment water drawn from the electrolytic bath 120. In this process, hydrogen (H ₂ ), chlorine gas (Cl ₂ ), etc., which are byproducts independent of the ballast water treatment, are generated again as in the electrolytic bath 120.

The concentration of the metal ion has a predetermined correlation with a current value applied to the primary treatment water in the metal ion generating unit 130. The relationship between the current value and the concentration of the generated metal ion may be, for example, in the form of a table or a function (e.g., a linear function such as y = bx, where y is the metal ion concentration, x is the current value, A proportional constant), and may be stored in the controller 150.

That is, the control unit 150 generates and outputs a control signal based on the correlation between the stored current value and the concentration of the metal ions, thereby determining the current value supplied to the metal ion generating unit 130 in the rectifying unit 140 as So that the amount of metal ions produced by electrolysis can be controlled.

A gas-liquid separator 160 is disposed at a rear end of the metal ion generator 130 to remove hydrogen and chlorine, which are by-products not related to equilibrium water treatment among the substances generated in the electrolytic bath 120 and the metal ion generator 130, Remove the gas. That is, the sterilizing liquid containing the high concentration of hypochlorous acid and the predetermined concentration of the metal ion of the liquid component is passed through and only the hydrogen and chlorine gas of the gas component are separated and discharged to the outside of the apparatus to prevent the main stream from being injected.

1) of the liquid component in which the gas component has been separated in the gas-liquid separator 160 is supplied to the main pipe 50 (see FIG. 1), containing hypochlorous acid and metal ions (copper ion and / or silver ion) Injected at the flow point and mixed into the main stream.

In the main piping 50, seawater introduced through the seed chest is mixed with the sterilizing liquid generated through the electrolytic bath 120 and the metal ion generating unit 130.

The sterilizing liquid generated through the electrolytic bath 120 and the metal ion generating unit 130 contains hypochlorous acid and copper and / or silver ions at a predetermined concentration and merges at the middle stream point of the main stream, After the mixing process, the main stream has an appropriate concentration of hypochlorous acid and copper and / or silver ions, and the treated water, which has been sterilized smoothly for a large amount of seawater (main stream), becomes a ballast tank .

The control unit 150 controls the functions of the respective components included in the ship ballast water processing apparatus 100.

For example, the control unit 150 may control the pumping operation of the inflow pump 110 to adjust the amount of side stream introduced into the electrolytic bath 120.

The control unit 150 may control the amount of hypochlorous acid generated in the electrolytic bath 120, that is, the concentration of residual chlorine, by controlling the current value supplied to the electrolytic bath 120 from the rectification unit 140. The control unit 150 may control the amount of metal ions generated in the metal ion generating unit 130, that is, the concentration of metal ions, by controlling the current value supplied to the metal ion generating unit 130 in the rectifying unit 140 have.

The ship ballast water treatment apparatus 100 includes a measuring unit (not shown) for measuring a residual chlorine concentration and / or a metal ion concentration with respect to a main stream passing through a mid-downstream point of the main piping 50 located below the injection point of the sterilizing liquid Time).

The control unit 150 determines whether the concentration of the sterilizing liquid currently produced is appropriate based on the residual chlorine concentration and / or the metal ion concentration measured by the measuring unit. If the concentration does not reach an appropriate value, A control signal for increasing or decreasing the amount of hypochlorous acid generated in the electrolytic bath 120 or increasing or decreasing the amount of metal ions generated in the metal ion generating unit 130 is generated and output to the rectifying unit 140 can do.

That is, the control unit 150 determines whether the sterilizing liquid generated as a result of the electrolysis twice on the side stream is supplied to the rectifying unit 140 based on the residual chlorine concentration and / or the metal ion concentration of the main stream measured after the main stream is injected. A control signal for controlling a current value to be supplied to the electrolytic bath 120 and / or the metal ion generating unit 130 may be generated and output.

In the present embodiment, as described above, the metal ion generating unit 130 is applied as an auxiliary means of the sterilizing apparatus using hypochlorous acid, so that the initial amount of residual chlorine can be reduced. According to the existing electrolysis method, hypochlorous acid has to be injected in excess of the level at which the initial sterilization is possible in order to utilize the residual of hypochlorous acid to the maximum. However, according to this embodiment, the water ballast water, It is not necessary to generate and inject an excessive amount of hypochlorous acid because it is continuously present in water without volatility due to the presence of metal ions and exhibits its germicidal effect. Also, in the process of discharging the ballast water, a device for generating additional residual chlorine in order to kill the microorganisms regenerated in the ballast tank immediately before discharge becomes unnecessary.

Like the electrolytic bath 120, the metal ion generating unit 130 operates by supplying electrical energy to the electrodes. The metal ion generating unit 130 includes a rectifying unit 140, a gas-liquid separating unit 160, a sensor unit ) Can be shared with the electrolysis tank 120, so that there is no need for additional equipment, which is advantageous in terms of installation, and is also economical.

Hereinafter, the configuration of the metal ion generating unit 130 will be described in detail with reference to the drawings. 3 is an exemplary view showing a configuration of a metal ion generating unit according to an embodiment of the present invention.

Referring to FIG. 3, the metal ion generating part 130 includes electrode parts 131a, 131b, and 131c disposed in at least one layer.

The primary treatment water transferred from the electrolytic bath 120 flows through the lower part of the metal ion generating part 130 and proceeds from the lowest layer to the uppermost layer and then passes through the upper part of the metal ion generating part 130, The secondary process water is discharged and transferred to the gas-liquid separation unit 160 at the downstream (refer to arrows in Fig. 3). Electrolysis is performed while passing through the electrode portions 131a, 131b, and 131c disposed in each layer during the course of the primary process water proceeding from the lowest layer to the uppermost layer.

The electrode portions 131a, 131b and 131c of each layer have a shape in which, for example, one or more rectangular metal plates are arranged in parallel to one another as electrode plates. In the drawings, one or more metal plates are vertically erected and arranged in parallel in the lateral direction, but this is merely an example, and in some cases, one or more metal plates may be arranged laterally and arranged in parallel in the longitudinal direction will be. Further, although the shape of the metal plate is shown as being rectangular, this is merely an example, and it may have various shapes depending on the cross-sectional shape of the layer on which the metal plate is disposed.

The interlayer connection holes 134a and 134b connected to the upper layer to the upper layer are arranged in a zigzag manner to extend the path of the primary process water from the lowest layer to the uppermost layer in the S-shape to maximize the length of the electrode parts 131a and 131b And 131c, respectively.

For example, as illustrated in FIG. 3, the first interlayer connection hole 134a connecting the first layer L1 and the second layer L2 includes an inlet (not shown) formed on the left side of the first layer L1 And the second interlayer connection hole 134b connecting the second layer L2 and the third layer L3 is formed on the opposite side (left side) of the first interlayer connection hole 134a And the discharge port 133 of the third layer L3 may be formed on the opposite side (right side) of the second interlayer connection hole 134b.

The electrode portions 131a, 131b and 131c of the respective layers in the metal ion generating portion 130 may be configured as one, two or four or more layers in addition to the three-layer structure of copper-silver-copper as illustrated in FIG. And the number of the electrode plates included in each of the electrode units 131a, 131b, and 131c can be arbitrarily adjusted.

The electrode portions 131a, 131b, and 131c may include electrode plates of the same kind of metal, but may include electrode plates of different types according to the embodiment. For example, the electrode portions arranged in arbitrary layers may be composed of electrode plates arranged in parallel in the order of copper-silver-copper-silver, copper-copper-silver-silver,

In addition, when the silver electrode plate can not be installed due to economic problems, the structure of the metal ion generating unit 130 can be realized with only the copper electrode plate.

In this embodiment, it is assumed that the primary process water moves from the lower layer to the upper layer. However, if necessary, the metal ion generating unit 130 may be configured so that the primary process water moves from the upper layer to the lower layer.

4 is a view showing a concept of a ship ballast water treatment apparatus to which a metal ion generating apparatus according to another embodiment of the present invention is applied.

4, the apparatus for treating a ballast water according to the present invention includes a ship ballast water treatment apparatus 200, a main pipe 50, a metal ion injecting unit 205, an inflow pump 210, a metal ion generating unit 230, a rectifying unit 240, A control unit 250, a medicine injection unit 220, a medicine tank 222, and an injection pump 224 are shown in FIG.

The ship water ballast water treatment apparatus 200 according to another embodiment of the present invention is a chemical injection system for injecting a sterilizing agent into a main stream, And a sterilizing liquid containing metal ions is injected into the main stream to maintain high sterilizing power until discharging the ballast water.

The ballast water treatment apparatus 200 according to another embodiment of the present invention includes a metal ion implantation unit 205, a medicine injection unit 220, and a control unit 250.

The drug injection unit 220 includes a chemical tank 222 and an injection pump 224.

The chemical tank 222 is a space in which chemicals capable of sterilization treatment for seawater are stored in liquid form. Examples of the medicine stored in the chemical tank 222 include a chlorine-based substance having a sterilizing effect or a chemical substance such as Peraclean, Vitamin K3, ferrate ion, etc. Two or more combinations can be applied.

When the drug is in a solid form, it may be dissolved in water and transformed into a solution form. In this case, a separate stirrer (not shown) may be installed in the drug tank 222.

The liquid medicine stored in the chemical tank 222 can be injected into the main piping 50 of the target vessel through the injection tube by the pumping action of the injection pump 224. [

The metal ion injecting unit 205 includes an inlet pump 210, a metal ion generating unit 230, a rectifying unit 240, and a gas / liquid separating unit 260. In the ship ballast water treating apparatus 100 shown in FIG. 1, The electrolytic bath 120 is removed.

The inflow pump 210 pumps the seawater near the upstream point of the main piping 50 and allows some of the main stream of the seawater to flow into the raw water to the metal ion generating section 230 as a sidestream through the inflow pipe .

The metal ion generating unit 230 is disposed downstream of the inflow pump 210.

The metal ion generating unit 230 generates metal ions in an electrolytic manner and includes them in the raw water so that the ballast water is continuously treated in the water without being volatilized during the period of being stored in the ballast tank after being water- .

In other words, when the residual chlorine disinfection method is adopted by using the existing chemical injection method, the chemical balance (sterilizing agent) has a partial residual, but the vessel equilibrium which does not guarantee the persistence enough to maintain sterilization state A sterilization method using a metal ion is additionally applied as a complementary method to a water treatment apparatus.

The metal ion generating part 230 includes an electrode part made of a metal electrode (a copper electrode, a silver electrode or a copper / silver alloy electrode), and the metal ion generated in the anode (Cu ^{2 +} , Cu ⁺ , Ag ^+, etc.) are included in the raw water. Hydrogen (H ₂ ) and chlorine gas (Cl ₂ ), which are byproducts not related to ballast water treatment, are produced in this process.

The concentration of the metal ion has a predetermined correlation with the current value applied to the raw water in the metal ion generating unit 230. The relationship between the current value and the concentration of the generated metal ion may be, for example, in the form of a table or a function (e.g., a linear function such as y = bx, where y is the metal ion concentration, x is the current value, A proportional constant), and may be stored in the controller 250.

That is, the control unit 250 generates and outputs a control signal based on the correlation between the stored current value and the concentration of the metal ions, thereby calculating the current value supplied to the metal ion generating unit 230 in the rectifying unit 240 as So that the amount of metal ions produced by electrolysis can be controlled.

The metal ion generating portion 230 in this embodiment may have the same configuration as the metal ion generating portion 130 described with reference to FIG. However, the metal ion generating unit 230 in this embodiment has only a difference in that raw water (sea water) flows through the inlet.

A gas-liquid separator 260 is disposed downstream of the metal ion generating unit 230 to remove hydrogen and chlorine gas, which are by-products of the metal ion generating unit 230, irrespective of the equilibrium water treatment. That is, the sterilizing liquid containing the metal ions of the predetermined concentration of the liquid component is passed through, and only hydrogen and chlorine gas of the gas component are separated and discharged outside the apparatus to prevent the main stream from being injected.

The sterilizing liquid of the liquid component in which the gas component has been separated in the gas-liquid separator 260 is injected at the middle downstream point of the main pipe 50 containing the metal ions (copper ion and / or silver ion) and mixed into the main stream .

In the main piping 50, the seawater flowing through the seed chest, the medicine injected from the drug injecting unit 220, and the sterilizing liquid generated through the metal ion generating unit 230 are mixed.

The sterilizing liquid generated through the metal ion generating unit 230 contains a predetermined concentration of copper and / or silver ions and is merged at the middle stream downstream of the main stream. After the dilution and complete mixing process, Copper, and / or silver ions, and treats the large-capacity seawater (main stream) with sterilization treatment, thereby transferring the treated water to the ballast tank.

The control unit 250 controls the functions of the respective components included in the ship ballast water treatment apparatus 200. The control unit 250 may control the pumping operation of the injection pump 224 to adjust the amount of sterilization liquid stored in the chemical tank 222 into the main piping of the target vessel.

The control unit 250 may control the pumping operation of the inflow pump 210 to adjust the amount of the side stream introduced into the metal ion generating unit 230. The control unit 250 may control the amount of the side stream introduced into the metal ion generating unit 230 The amount of metal ions generated by the metal ion generating unit 230, that is, the concentration of the metal ions, may be controlled by controlling the supplied current value.

The ship ballast water treatment apparatus 200 includes a measurement unit for measuring a chemical concentration and / or a metal ion concentration with respect to a main stream passing through a midstream and a downstream point of a main pipeline 50 located below a chemical injection point and a sterilizing liquid injection point, (Not shown).

The control unit 250 determines the adequacy of the concentration of the sterilizing liquid currently generated on the basis of the measured drug concentration and / or the metal ion concentration in the measuring unit, and if the concentration does not reach an appropriate value, A control signal for increasing or decreasing the amount of the medicine injected from the drug injecting unit 220 and outputting the control signal to the chemical tank 222 or increasing or decreasing the amount of the metal ion generated by the metal ion generating unit 230 And outputs the generated signal to the rectifying unit 240.

According to the conventional chemical injection method, in order to maximize the residual property of the chemical, the chemical must be injected in excess of the level at which initial sterilization is possible. However, according to the present embodiment, the water treatment equilibrium water, that is, the treated water is stored in the ballast tank It is not necessary to inject an excessive amount of medicine since the germicidal effect is continuously present in water without volatility due to the presence of metal ions.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

100, 200: ship ballast water treatment apparatus 110, 210: inflow pump
120: Electrolysis tank 130, 230: Metal ion generator
140, 240: rectifying part 150, 250:
160, 260: gas / liquid separator 220:
222: chemical tank 224: injection pump
131a, 131b, 131c: electrode part 132:
133: Outlets 134a, 134b: Interlayer connection hole

Claims (10)

A ship ballast water treatment apparatus for treating sea water flowing from the outside of a ship and storing the ballast tank as ship ballast water,
An inflow pump for introducing a part of the seawater at a point upstream of the main pipeline where the seawater runs;
An electrolysis tank for electrolyzing the seawater introduced by the inflow pump to generate hypochlorous acid and to discharge the primary treated water containing the hypochlorous acid;
A metal ion generator connected to a downstream end of the electrolytic bath for discharging secondary treatment water containing metal ions generated by electrolyzing the primary treatment water to the main pipe;
A rectifying unit for supplying a current to the electrolytic bath and the metal ion generating unit; And
And a control unit for controlling a current supplied from the rectifying unit to the electrolysis tank and the metal ion generating unit. The method of claim 1,
Further comprising: a measurement unit installed in the main pipe for measuring a concentration of at least one of hypochlorous acid concentration and metal ion concentration of the ship equilibrium water,
Wherein the control unit controls the current value supplied to at least one of the electrolytic bath and the metal ion generating unit in the rectifying unit based on the hypochlorous acid concentration and the metal ion concentration measured by the measuring unit Device. A ship ballast water treatment apparatus for treating sea water flowing from the outside of a ship and storing the ballast tank as ship ballast water,
A chemical injector for injecting a drug having a sterilizing effect into the main pipeline where the seawater flows;
A metal ion implantation unit for introducing a part of the seawater at a point upstream of the main pipeline and re-injecting the generated metal ions into the main pipeline by electrolysis; And
And a control unit for controlling at least one of the amount of medicine injected from the medicine injection unit and the amount of metal ions generated from the metal ion injection unit. The method of claim 3,
Wherein the medicament comprises one or more of a chlorine-based material, Peraclean, vitamin K3 (Vitamin K3), ferrate ion (Ferrate ion) or a combination of two or more thereof. The method of claim 3,
The metal ion implantation unit may include:
An inflow pump for introducing a part of the seawater at a point upstream of the main pipe;
A metal ion generating unit for electrolyzing the seawater introduced by the inflow pump to generate metal ions and discharge the metal ions to the main pipe; And
It includes a rectifier for supplying a current to the metal ion generating unit,
The control unit is a ballast water treatment apparatus for controlling the current supplied to the metal ion generating unit in the rectifying unit. 6. The method according to claim 1 or 5,
Wherein the metal ion generating part includes an electrode part made of at least one of copper and silver or an alloy containing copper and silver. 6. The method according to claim 1 or 5,
Wherein the metal ion generating part includes an electrode part divided into a plurality of layers,
Wherein the electrode portions of each layer have a shape in which one or more metal plates are arranged parallel to each other. 8. The method of claim 7,
Wherein the metal ion generating unit is arranged in a zigzag manner in the interlayer connection holes connected from the lower layer to the upper layer. 6. The method of claim 5,
And a measuring unit installed in the main pipe for measuring at least one concentration of the chemical concentration and the metal ion concentration of the ship ballast water,
Wherein the control unit controls a current value supplied from the rectifying unit to the metal ion generating unit based on the chemical concentration and the metal ion concentration measured by the measuring unit. 6. The method according to claim 1 or 5,
Further comprising a gas-liquid separator connected to a rear end of the metal ion generating unit and adapted to inject only the liquid component separated from the gas component, which is a by-product generated in the metal ion generating unit, into the main pipe.

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