KR20090057771A - Ships ballast water treatment apparatus - Google Patents

Abstract

A ballast water treating apparatus is provided to offer high sterilization effect, minimize capacity of a contact tub, restrict scale generation of a sterilization unit, and to minimize the amount of power. A ballast water treating apparatus includes a microfilter(1), an electrolyzer(2), and a contact tub(3). The microfilter removes suspended solids contained in a part of ballast water. The electrolyzer generates hypochlorous acid and hydrogen peroxide by electrolyzing the filtered ballast water. The contact tub sterilizes microbe included in the ballast water not electrolyzed. The contact tub includes a first contact tub(31) and a second contact tub(32). The first contact tub includes a mixer(31a) and a sensor(31b). The second contact tub includes an ultra-violet ray lamp(32a).

Description

Ballast water treatment apparatus

The present invention relates to a device for treating ballast water discharged from a ballast tank of a ship. Specifically, by applying a combination of UV and electrolysis, a high sterilization effect can be obtained, and the capacity of a contact tank can be minimized. The present invention relates to a ballast water treatment apparatus capable of suppressing generation of scale and minimizing applied power.

Ships are frequently used as a means of transporting a large amount of goods.

Such vessels are not easily submerged in small waves because the vessels do not sink sufficiently in water, and the propellers and rudders are not sufficiently submerged so that they do not operate efficiently.

Accordingly, in the case of vessels, the vessels are operated with seawater contained in ballast tanks to maintain balance and increase stability after unloading the cargo. ) And the weight to adjust the trim.

The ballast water is unloaded as described above, and after filling the seawater in the ballast tank and arriving at the ports of other countries to load the cargo, the ballast water is discharged to the sea of the destination to reduce the weight of the vessel and then load the cargo. Doing.

The ballast water serves to mix the seawater of different seas as described above, and the ballast water is kept in a ballast tank for a long time, so that various germs grow or mixed with foreign marine species of different seas. To destroy the ecosystem.

In other words, organisms or pathogens in a specific area included in the ballast water are transferred to a completely different area by the vessel containing the ballast water, and sprinkled on the oceans of the region, whereby organisms of different ecosystems are mixed and the ecosystem is disturbed. In addition, there was a problem that caused great damage to the coastal industry and other commercial activities or resources.

In order to solve this problem, an apparatus or method for removing various harmful substances contained in ballast water has been developed and provided.

The ballast water treatment apparatus is a sterilization method using electrolysis or a sterilization device using ultraviolet rays.

However, in the case of the ballast water treatment device using electrolysis, the size of the device becomes too large, the number of insoluble electrodes, which is a key component, and the contact time are long, in order to electrolyze a large amount of ballast water in a short time. There is a disadvantage that cannot be maintained.

That is, by using expensive insoluble electrode, it is impossible to lengthen the contact time between the electrode and seawater, and high current is applied to obtain satisfactory sterilization effect.As a result, the lifetime of the electrode is shortened and it is immobilized by light metal such as calcium or magnesium. There was a burden of accelerating the Cathode Passivation and covering the high instantaneous power with the limited power of the vessel.

On the other hand, in the case of the device for sterilizing the ballast water using ultraviolet sterilization, there is a problem in that the cost of the installation and the maintenance are high as the scale of calcium and magnesium generated during the sterilization process must be removed.

The present invention has been developed to solve the problems of the prior art as described above, by applying a combination of UV and electrolysis can obtain a high sterilization effect, can minimize the capacity of the contact tank, the scale is generated in the sterilization unit It can be suppressed, and an object of the present invention is to provide a ballast water treatment apparatus that can minimize the applied power.

Ballast water treatment apparatus of the present invention for achieving the above object and a micro filter for removing the suspended solids contained in some ballast water of the ballast water; An electrolysis tank for electrolyzing ballast water from which foreign substances are filtered by the microfilter to generate hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ); The electrolysis hypochlorite to the ballast water ^- are characterized by configured including Contactor for sterilizing the microorganisms included in the ballast water to be decomposed and supplying electricity containing hydrogen peroxide _{(H 2 O 2) (OCl} ).

The present invention can obtain a high sterilization effect by combining a combination of ultraviolet and electrolysis in treating ballast water, can minimize the capacity of the contact tank, can suppress the generation of scale, can minimize the applied power It works.

In particular, a hypochlorite (OCl ^-) produced by electrolysis a portion of the ballast water to produce and thus hypochlorite (OCl ^-) a sterilization by supplying electricity can be decomposed in the ballast water, including after sterilization by again sterilized by ultraviolet Can increase the effect.

Hereinafter, with reference to the accompanying drawings for the ballast water treatment apparatus according to the present invention will be described in detail.

1 is a configuration diagram of an example of a ballast water treatment apparatus according to the present invention, Figure 2 is a configuration diagram of another example of a ballast water treatment apparatus according to the present invention, Figure 3 is a ballast water treatment apparatus according to the present invention Micrographs of ballast water treated and ballast water treated before.

As shown, the ballast water treatment apparatus according to the present invention includes a micro filter (1) for removing suspended solids contained in some ballast water of the ballast water; An electrolysis tank (2) for electrolyzing ballast water from which foreign matter is filtered by the microfilter (1) to generate hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ); The electrolysis hypochlorite to the ballast water ^- is configured to include the contacting of hydrogen peroxide and (3) to supply electricity can decompose containing (H ₂ O ₂₎ for sterilizing the microorganisms contained in ballast water (OCl).

The micro filter (1) is a kind of filter that is typically used to filter foreign matter in a water treatment facility, suspended solids that are substances that interfere with electrolysis in the process of electrolysis in a subsequent electrolysis tank (2), Filter out protozoa.

The ballast water from which the foreign matter is filtered by the microfilter 1 is electrolyzed in the electrolysis tank 2 to generate hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ).

The ballast water supplied to the electrolysis tank 2 through the microfilter 1 is a part of the total ballast water, which is hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) used to sterilize other ballast water. Serves as a raw material for producing

The electrolyzed water electrolyzed in the electrolysis tank 2 and containing hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) is supplied to the contact tank 3.

The electrode provided in the electrolysis tank 2 is an insoluble electrode, and the current supplied is supplied with a bipolar current.

The two electrodes constituting the electrolysis bath 2 is IrO ₂ / using an insoluble electrode of Ti, such as hypochlorite (OCl ^-) and hydrogen peroxide (H ₂ O _2), but to the occurrence of the maximum and calcium in the negative electrode (Ca) scale (scale) is formed hypochlorite (OCl ^-) and hydrogen peroxide (H ₂ O ₂₎ light metals of sea water by reverse fed every so to inhibit the generation predetermined time the current supplied to the electrode in the bipolar type ( Mg, Ca) was suppressed from passivation (Cathode passivation) to the electrode.

Of course, the electrolyzed water containing hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) is mixed with the non-electrolyzed ballast water supplied to the contact tank 3 and included in the non-electrolyzed ballast water. Sterilize the microorganisms.

The contact tank 3 constituting the ballast water treatment apparatus configured as described above may be configured by connecting the primary contact tank 31 and the secondary contact tank 32 in series, as shown in FIG.

That is, the contact tank 3 is composed of a primary contact tank 31 and the secondary contact tank 32, the primary contact tank 31 is electrolyzed water electrolyzed in the electrolysis tank 2 acid hypochlorite (OCl ^-) contained in this being achieved by the sterilization, and the sterilized second drive to supply a low external to the secondary contact Joe the ballast water disinfection primary.

As described above, the primary contacting tank 31 is a tank for disintegrating with hypochlorous acid, and includes electrolyzed water containing hydrochloric acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) and ballast water that is not electrolyzed. there is a stirrer (31a) is provided for mixing and agitating the ballast water that is not the number of incoming and electrolyzed electrolytic hypochlorite (OCl ^-) were able to increase the sterilizing effect by mixing to be uniform.

In addition, the primary contact tank 31 may be further provided with a sensor 31b for measuring the concentrations of hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) in the tank.

In this way, the sensor 31b is further installed to continuously measure the concentrations of hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) in the primary contact bath, and when the concentration is low, the electricity supplied from the electrolysis bath (2). The amount of decomposed water was increased to match the concentration.

In order to be able to easily adjust the amount of electrolysis shoe supplied to the primary contact tank 31, the amount of electrolyzed water electrolyzed in the electrolysis tank 2 should be sufficiently secured so that the electrolysis tank 2 The storage space for storing the electrolyzed water is required in this, for this purpose is to store the electrolyzed water electrolyzed in the electrolysis tank (2) between the electrolysis tank (2) and the contact tank (3) The reservoir 4 is further provided.

The reservoir 4 is a space in which the electrolyzed water regularly decomposed in the electrolysis tank 2 is stored. As shown in FIG. 2, the outlet pipe 4a and the electrolysis tank 2 of the storage tank 4 are stored. Between the intake pipe (2a) of the) is further provided with a circulation tube 24 for supplying the electrolysis water stored in the storage tank 4 back to the electrolysis tank 2 to be electrolyzed again, the circulation pipe At the end of 24, a circulation pump 42 for forcibly circulating electrolyzed water was further installed.

The reason why the circulation means is further provided is to maintain the concentration of hypochlorous acid (OCl ⁻ ) contained in the electrolyzed water stored in the storage tank 4.

Hypochlorite (OCl ^-) is chloride (Chloride (Cl ^-)) or the like, or sunlight or ultraviolet rays in the atmosphere because the deterioration of sodokryeok be generated when stored for an extended period of time in the storage tank (4) because of the nature that is converted to.

That is, the storage tank (4), hypochlorite (OCl ^-) can be of the electrolytic stored in hypochlorite (OCl ^-) continuously detect the concentration of the circulated to the lower ground again electrolyzer (2) the concentration of hypochlorite (OCl ^-The above circulation means are further configured to maintain the concentration of-).

In this way, the sensor 41 is further installed in the storage tank 4 as a means for continuously measuring the concentration of hypochlorous acid (OCl ⁻ ) stored in the storage tank 4.

As described above, the sensors 31b and 41 may use an ORP meter or a chlorine meter as a means for detecting the concentration of hypochlorous acid as described above.

The first sterilized ballast water in the primary contact tank 31 is supplied to the secondary contact tank 32.

The secondary contact tank 32 is provided with an ultraviolet lamp 32a for sterilizing by irradiating ultraviolet rays to the ballast water firstly sterilized by the primary contact tank 31.

Referring to the ballast water treatment process using the ballast water treatment apparatus according to the present invention configured as described above are as follows.

As described above, some of the ballast water stored in the ballast tank is electrolyzed to make electrolyzed water, and the electrolyzed water thus produced is mixed with the ballast water to be sterilized.

The amount of electrolyzed water, that is, the amount of ballast water supplied to the electrolysis tank, may vary depending on the water quality or the situation of the ballast water, and is not limited thereto. In order to remove foreign substances contained in the ballast water supplied through electrolysis bath. The micro filter is provided.

That is, the process of treating the ballast water using the apparatus of the present invention comprises a process of preparing the electrolyzed water and a process of mixing the electrolyzed water with the ballast water to sterilize, and these two processes may be performed at the same time.

First, the electrolytic process, sodium hypochlorite in underwater electrolysis after removing the foreign matter as a filter to boehmite ballast water supplying tank electrolyzed by the electrolysis as described above ^- the hydrogen peroxide _{(H 2 O 2) (OCl} ) To be created.

Electrolyzed water in which hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) are generated is stored in a storage tank and supplied to a primary contact tank of a contact tank.

Ballast water that is not electrolyzed is continuously supplied to the primary contact tank, and the electrolyzed water and the ballast water are evenly mixed by stirring with a stirrer while supplying the electrolyzed water thereto.

Hypochlorous acid (OCl ⁻ ) in the mixed electrolyzed water sterilizes the microorganisms contained in the ballast water.

So the primary sterilization is composed of the ballast water is supplied to the second contact twos, hypochlorite (OCl ^-) by the ultraviolet light emitted from the ultraviolet lamp configured to Article secondary contact is removed, the remaining microorganism is sterilized with.

In the above process, chemical reactions in which hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) are generated or chemical reactions in which hypochlorous acid (OCl ⁻ ) is removed are known, and a detailed description thereof will be omitted. As can be seen in the photograph shown in Figure 1 can be seen that the ballast water treated through the apparatus of the present invention is sufficiently sterilized.

1 is a configuration diagram of an example of a ballast water treatment apparatus according to the present invention,

2 is a configuration diagram of another example of the ballast water treatment apparatus according to the present invention,

Figure 3 is a micrograph of the ballast water treated before and the ballast water treated using the ballast water treatment apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: micro filter

2: electrolysis tank

  2a: inlet tube 24: circulation tube

3: contact tank

  31: Primary contact tank

    31a: Stirrer 31b: sensor

  32: secondary contact tank

    32a: UV lamp

4: storage tank

  4a: water outlet

  41 sensor 42 circulating pump

5: pump

Claims (6)

A micro filter (1) for removing suspended substances contained in some ballast water of the ballast water; An electrolysis tank (2) for electrolyzing ballast water from which foreign matter is filtered by the microfilter (1) to generate hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ); The electrolysis in the ballast water hypochlorite (OCl ^-) and hydrogen peroxide (H ₂ O ₂₎ is supplied as the number of unfulfilled the electrolysis can the electrolysis ballast water containing sterilizing the microorganisms contained in the non-electrolysis ballast Ballast water treatment apparatus characterized in that it comprises a contact tank (3). The method of claim 1, The contact tank 3 is composed of a primary contact tank 31 for primary sterilization, and a secondary contact tank 32 for sterilizing the first sterilized ballast water again. The primary contact tank 31 is an agitator 31a for electrolyzing ballast water to mix electrolyzed water including hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) and ballast water that is not electrolyzed. And a sensor 31b for measuring the concentrations of hypochlorous acid (OCl ⁻ ) and hydrogen peroxide (H ₂ O ₂ ) in the bath, The secondary contact tank (32) is ballast water treatment apparatus characterized in that it comprises an ultraviolet lamp (32a) for sterilizing by irradiating ultraviolet rays to the ballast water first sterilized in the primary contact tank (31). The method according to claim 1 or 2, Ballast water treatment apparatus further comprises a storage tank (4) for storing the electrolyzed water electrolyzed in the electrolysis tank (2) between the electrolysis tank (2) and the contact tank (3). The method of claim 3, wherein Between the outlet pipe 4a of the reservoir 4 and the inlet pipe 2a of the electrolysis tank 2, the electrolyzed water stored in the reservoir 4 is supplied to the electrolysis tank 2 to be electrolyzed again. A circulating pipe (24) is further provided to enable the ballast water treatment device, characterized in that the circulating pump (24) is further provided with a circulation pump (42) for forcibly circulating electrolysis water. The method of claim 4, wherein The reservoir (4) is ballast water treatment apparatus further comprises a sensor (41) for detecting the concentration of hypochlorous acid contained in the electrolyzed water stored in the reservoir (4). The method of claim 5, wherein The electrode provided in the electrolysis tank (2) is an insoluble electrode, ballast water treatment apparatus, characterized in that the current supplied is a bipolar current.

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