KR101763351B1 - Apparatus for sterilization of ballast water - Google Patents

Apparatus for sterilization of ballast water Download PDF

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KR101763351B1
KR101763351B1 KR1020150147728A KR20150147728A KR101763351B1 KR 101763351 B1 KR101763351 B1 KR 101763351B1 KR 1020150147728 A KR1020150147728 A KR 1020150147728A KR 20150147728 A KR20150147728 A KR 20150147728A KR 101763351 B1 KR101763351 B1 KR 101763351B1
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South Korea
Prior art keywords
seawater
unit
water
inflow line
line
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KR1020150147728A
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Korean (ko)
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KR20170047516A (en
Inventor
공길영
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한국해양대학교 산학협력단
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Priority to KR1020150147728A priority Critical patent/KR101763351B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
    • B63J4/002—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating ballast water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring

Abstract

The present invention relates to a ship ballast water treatment apparatus, which can be driven with a small power and does not require a large installation space, so that it can be easily installed even in a small ship, It is possible to sterilize the ballast water with low cost and excellent efficiency.

Description

[0001] Apparatus for sterilization of ballast water [0002]

The present application relates to a ship ballast water treatment apparatus.

Ballast water means seawater stored in a ship in proportion to the cargo output to prevent the problem that the stability of the ship is lowered as the center of gravity of the ship becomes higher due to buoyancy when the cargo is taken out of the ship. Conversely, when cargo is loaded on a ship, ballast water is discharged. The amount of discharge is also proportional to the cargo load. In this way, as the international trade volume increases, the equilibrium of the ship, which is essential for the operation of the ship, has various kinds of marine microorganisms inhabited in the place where the ballast water was collected, Resulting in disruption of distribution of marine microorganisms. For example, marine microorganisms contained in ship equilibrium water are discharged along with marine equilibrium water in the sea of a third country, and show vigorous reproduction when they adapt to the environment of the discharge area. As a result, marine microorganisms introduced from other regions are naturally incarnated in the sea area and spread to neighboring sea areas, and the native marine living resources are greatly affected. It may be desirable if a situation occurs in which the balance between incoming alien species and indigenous species occurs, but the reality is not so that the damage of native species can cause a great change in the ecosystem food chain and the economic loss May occur. In other words, the introduction of foreign marine microorganisms leads to an undesirable change of the marine ecosystem, which in turn affects the human life of the sea. Therefore, there is an increasing demand for a technique for removing marine microorganisms by sterilization treatment before discharge of ship ballast water.

Conventional ballast water sterilization treatment techniques include a method using UV, filter or ozone.

However, the disinfection methods of ship equilibrium water using the above method have a disadvantage that a filter is clogged due to the formation of additional foreign matter, and a corrosion prevention method of equipment related to ship equilibrium water is required. Therefore, there is a problem. In addition, the method using ozone has an advantage that it can be used in all sea areas, but there is a problem that it is possible to install the ozone only on a large ship because the apparatus for generating ozone is large.

On the other hand, Patent Document 1 discloses a ship ballast water treatment method using an electrolysis method in order to solve the disadvantage of the ship ballast water treatment technique as described above. However, since a large amount of ship ballast water flowing from the outside is electrolyzed, There is a problem that the size of the disintegration device is large, which can be used only for a ship having a certain size or more, and there is a disadvantage that power consumption is large because a large amount of ballast water is electrolyzed.

1. Korea Patent No. 1468928

The present application is to provide a ship ballast water treatment apparatus including an electrolytic apparatus which is easy to install and requires a small space for installation.

Another technical problem to be solved by the present application is to provide a ship ballast water supply apparatus which is low in electric power consumption and capable of electrolysis even in a fresh water area.

The present invention provides a marine equip- ment water treatment apparatus comprising: a seawater inflow line for inflowing seawater from the outside; A ship ballast water storage unit for storing the seawater introduced from the seawater inflow line; An electrolysis unit for electrolyzing a part of seawater flowing into the inflow line to generate treated water; A process water storage unit for storing the process water electrolyzed from the electrolysis unit; A salinity measuring unit for measuring a saline value (psu) value of seawater flowing from the seawater inflow line; A control unit for generating a control signal for controlling an amount of treated water flowing out of the driving and treating water storage unit of the electrolysis unit according to the actual salt value (psu) measured by the salt measuring unit; And a dilution line for mixing the treated water with seawater flowing into the seawater inflow line.

Further, in the ship ballast water treatment apparatus of the present application, the concentration of sodium hypochlorite in the electrolyzed treated water is 30 ppm or more.

The ship ballast water treatment apparatus of the present application further comprises a brine storage section for storing brine to be supplied to the electrolytic apparatus.

The ship ballast water treatment apparatus of the present application further comprises a medicine storage unit for storing an oxidizing agent to be supplied to the seawater inflow line.

In addition, the present invention is characterized in that the control unit transmits a driving signal of the electrolytic decomposition unit to the electrolysis unit when the actual salinity (psu) value measured by the salinity measurement unit is 30 or more.

When the actual salinity (psu) value measured by the salinity measuring unit is in the range of less than 30 to over 10, the control unit controls the electrolysis unit to output the driving signal of the electrolysis unit and the process water storage unit And an outflow amount signal of the treated water is transmitted.

In addition, in the present invention, when the actual salinity (psu) value measured by the salinity measuring unit 40 is in the range of less than 30 to more than 10, the control unit supplies the brine in the saline storage unit to the electrolysis apparatus And transmits a signal.

In addition, the present invention is characterized in that when the actual salinity (psu) value measured by the salinity measuring unit is 10 or less, the control unit transfers the flow rate of the treated water to the treated water storage unit.

The ship ballast water treatment apparatus of the present application is characterized in that when the actual salinity (psu) value measured by the salinity measurement unit is 10 or less, the control unit transmits a signal to put the medicine of the medicine storage unit into the seawater inflow line do.

The vessel water treatment apparatus of the present application is characterized in that the oxidizing agent is one selected from the group consisting of sodium hypophosphite (NaDCC), sodium hypochlorite (NaOl) and calcium hypochlorite (Ca (OCl) 2 ) Or more.

The ship ballast water treatment apparatus of the present application further includes a discharge line for discharging the ballast water stored from the ship ballast water storage unit to the outside; And a neutralizing agent storage unit for storing the neutralizing agent to be supplied to the discharge line.

The ship ballast water treatment apparatus of the present application further comprises a TRO measuring unit for measuring a concentration of total residual oxidant (TRO) in the seawater inflow line and the discharge line.

The ship ballast water treatment apparatus of the present application can be easily driven even in a small ship because it can be driven with a small power and does not require a large installation space and can be electrolyzed even in a fresh water area, It is possible to sterilize the water.

1 is a process diagram of an exemplary marine ballast apparatus according to the present application.

The present application relates to a ship ballast water treatment apparatus. According to the ship ballast water treatment apparatus of the present application, it is possible to drive even a small amount of electric power, and a large installation space is not needed, so that it can be easily installed even in a small ship, It is possible to sterilize the ship equilibrium water.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present application, however, may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

1 is a process diagram of an exemplary marine ballast apparatus according to the present application.

As shown in FIG. 1, the apparatus for treating ballast water according to one embodiment of the present application includes a seawater inflow line L1 for inflowing seawater from the outside; A ship ballast water storage unit 10 for storing the seawater introduced from the seawater inflow line L1; An electrolysis unit (20) for electrolyzing a part of the seawater flowing into the inflow line to generate treated water; A process water storage section (30) for storing the electrolyzed process water from the electrolytic section (20); A salinity measuring unit 40 for measuring the actual saline (psu) value of seawater flowing from the seawater inflow line L1; A control unit for generating a control signal for controlling the flow rate of the process water flowing out of the drive and process water storage unit 30 of the electrolysis unit 20 according to the actual salt value psu measured by the salt measurement unit 40; (110); And a dilution line L2 for mixing the treated water with seawater flowing into the seawater inflow line L1.

The term " practical salt " in this application means the grams of total salinity contained in 1 Kg of seawater. In the present specification, the term " sea water " means water introduced from outside into a ship operating a sea or a river, and may be exemplified as seawater, river or the like. The seawater refers to water containing or not containing salinity. In the technical field, seawater is classified into sea water, nose water or fresh water according to practical salt value, but in the present specification, all of them are defined as seawater. It shall be classified according to the range of the salinity value.

In one example, although not shown, the seawater inflow line L1 may include a sea chest provided in the vessel, and the sea water inflow line L1 may include, for example, And seawater can be introduced from the outside through the inflow pipe.

The ballast water storage unit 10 stores seawater introduced from the seawater inflow line L1, thereby balancing the overall ship. For example, when a cargo is shipped to a ship, the seawater stored in the ship ballast water storage unit 10 is discharged. When the cargo is released, the seawater introduced from the seawater inflow line L1 is discharged to the ship ballast water storage unit 10, The center of gravity of the ship can be caught.

The electrolytic unit 20 is included in the processing apparatus of the present application in order to electrolyze a part of the seawater flowing into the seawater inflow line L1 to generate treated water. The electrolytic unit 20 can be driven with a smaller amount of electric power than conventional electrolytic apparatuses by using a part of the seawater introduced from the seawater inflow line L1 for electrolysis. In addition, the electrolytic unit 20 can use a small-sized electrolytic apparatus capable of electrolyzing a small amount of seawater. Accordingly, the electrolytic unit 20 can be installed in a narrow space and can be easily installed on a small-sized vessel.

In one example, the vessels of small size may be vessels weighing from 1,000 to 50,000 tons, for example from 5,000 to 30,000 tons or from 3,000 to 10,000 tons.

The capacity of the electrolytic apparatus may be 100 to 1000 m 3 / h, 100 to 500 m 3 / h or 100 to 300 m 3 / h or less. When the capacity of the electrolytic apparatus is more than 1000 m 3 / h, an electrolytic apparatus of a predetermined size or more is required, and accordingly, a wide installation space is required. Therefore, Can be difficult to install. When the capacity of the electrolytic apparatus is less than 100 m < 3 > / h, it is difficult to appropriately maintain the concentration of sodium hypochlorite in the treatment water to be described later, It may be difficult to effectively remove water or microorganisms.

In one example, the amount of power used in the electrolysis apparatus may be 1 to 50 kW or less, 1 to 25 kW or less, or 1 to 15 kW or less. The electrolytic apparatus using the electric power of the above-mentioned range has a scale capable of being installed in a narrow space, and thus can be easily installed in a vessel of small size desired in the present application.

In one example, the electric power used for the electrolytic apparatus of the capacity of 300 m 3 / h is 15 kW, the electric power used for the electrolytic apparatus of the capacity of 500 m 3 / h is electricity of 25 kW or 1000 m 3 / h The amount of power used in the dissolver may be 50 kW.

In one example, the present invention's marine ballast water treatment apparatus 1 may include a branch line L3 in which a part of the seawater introduced from the seawater inflow line L1 flows into the electrolysis unit 20 have. In one embodiment, the control valve 100 may be provided in the branch line L3, thereby allowing only a portion of the seawater to flow into the electrolysis section 20, so that even if a small- The seawater introduced from the branch line L3 can be electrolyzed to generate a high-concentration treated water. The term " treated water " in the present application means seawater electrolyzed in the electrolytic section 20, and means seawater containing sodium hypochlorite.

As the branch line L3, seawater can be introduced by using a conventional pump or the like. As the pump, for example, there can be mentioned a pump for taking in water for drinking water or sanitary liquid. In general, the pump can be driven with less power consumption than a pump used in an inlet chute and an inlet piping, and seawater can flow into the electrolysis section 20 even with a small amount of power.

The electrolysis unit 20 may electrolyze the seawater introduced from the branch line L3 to generate sodium hypochlorite (NaOCl).

In one example, in the electrolysis section 20, chlorine ion (Cl - ) of sea water is oxidized to generate chlorine gas (Cl 2 ) at the anode as shown in the following reaction formula 1, And hydrogen ions (H + ) are generated. At the same time, water is decomposed in the cathode, and hydrogen ions are generated and hydroxide ions (OH - ) are generated. The chlorine gas is dissolved in the solution, whereby sodium hypochlorite (NaOCl) can be produced.

[Reaction Scheme 1]

Anode reaction: 2Cl - → Cl 2 + 2e -

2H 2 O → 4H + + O 2 + 4e -

Cathode reaction: 2H 2 O + 2Na + + 2e - → 2NaOH + H 2

Overall reaction: Cl 2 + 2 NaOH → NaOCl + NaCl + H 2 O

In one example, the concentration of sodium hypochlorite in the treated water may be 500 to 2500 ppm, 500 to 2000 ppm, 500 to 1500 ppm, or 500 to 1000 ppm. By controlling the concentration of sodium hypochlorite within the above range, it is possible to effectively remove the released water or microorganisms of the stored seawater in the ballast water storage portion 10 with a small amount of seawater.

Further, although not shown in the drawing, the electrolysis unit 20 further includes a gas discharge unit capable of effectively discharging hydrogen gas generated in the cathode and a detection sensor capable of determining whether the hydrogen gas is leaked or not can do.

The electrolyzed process water is stored in the process water reservoir 30, and the stored process water may be introduced into the dilution line L2 through the control valve 100 if necessary. For example, when a ship enters a water body having a very low salinity value of sea water, for example, a nose or a fresh water area, since the size of the electrolytic apparatus is small, it is difficult to produce sufficient sodium hypochlorite, The concentration of the sodium hypochlorite in the dilution line L2 can be maintained at a constant level by introducing the treated water of high concentration previously stored in the treated water storage section 30 into the dilution line L2, It is possible to effectively remove the release of the stored seawater or the microorganism of the storage unit 10. [ The term "radionuclide zone" in the present application may mean an area having a practical salinity (psu) value of 8 to 20 psu, and a "freshwater zone" means an area having a practical salinity (psu) value of 0 to 4 psu.

The present invention may further include a brine storage unit 50 for storing brine to be supplied to the electrolytic unit 20.

In one example, the brine may have a utility salinity (psu) value of greater than 30 psu, greater than 35 psu, or greater than 40 psu. The upper limit of the salinity value of the brine is not particularly limited and may be, for example, 80 psu, 70 psu or 60 psu or lower. For example, when the ship is operating in a nautical zone or the like having a low practical salt value (psu), the controller 110 will recognize a problem requiring a high electric power to electrolyze the seawater flowing from the outside, Thus, by supplying the high-concentration brine stored in the brine storage section 50 to the electrolysis section 20, the treated water can be generated even at a low power amount.

The electrolytic unit 20 includes a salinity measuring unit 40 for measuring the actual salinity value and a salinity measuring unit 40 for measuring the actual salinity, And a control unit 110 for generating a control signal for controlling the flow rate of the process water flowing out of the drive and treatment water storage unit 30.

The salinity measuring unit 40 measures a practical salinity unit (psu) of the seawater introduced from the outside through the seawater inflow line L1 and outputs the actual salinity (psu) value of the measured seawater Are included in the processing apparatus of the present application. In one example, the salinity measuring part 40 may receive some of the seawater through the piping branching from the seawater inflow line L1, measure the actual salinity (psu) value of the received seawater, Total actual salinity (psu) value can be calculated. The actual salinity (psu) value of the seawater in the seawater inflow line L1 measured by the salinity measurement unit 40 is transmitted to the control unit 110, The control unit 110 generates a control signal for controlling the flow rate of the process water flowing out from the process unit 30. A specific driving mode of the control signal of the controller 110 will be described later.

In one example, the control unit 110 can operate the automatic unmanned operation by connecting a sensor, an automatic valve, a PLC or the like to a control panel, and further connect an alarm and a shutdown device to protect devices in the ballast water treatment apparatus have.

The ship ballast water treatment apparatus 1 of the present application includes a dilution line L2 for mixing the treated water with seawater flowing into the seawater inflow line L1. In one example, the treated water can be diluted by mixing seawater flowing into the seawater inflow line (L1) through the dilution line (L2) and treated water whose flow rate is controlled by the control unit (110) , So that the concentration of sodium hypochlorite in the seawater inflow line L1 can be appropriately maintained.

In one embodiment, the dilution line (L2) may further include a flow rate measurement unit (70) capable of measuring the flow rate of seawater flowing into the seawater inflow line (L1). The flow rate measuring unit 70 may transmit the measured flow rate value to the controller 110. Accordingly, the control unit 110 may generate a control signal for controlling the flow rate of the process water flowing out to the dilution line L2 through the flow rate measured by the flow rate measuring unit 70. In one example, the treated water flow rate can be controlled by the control valve 100.

In one example, the sodium hypochlorite concentration of the diluted process water may be 5 to 15 ppm, 5 to 13 ppm, 5 to 11 ppm, or 5 to 9 ppm. By controlling the sodium hypochlorite concentration in the above range, not only the sodium hypochlorite concentration of the treated water discharged from the ship ballast water storage section 10 to be described later can be prevented from exceeding the discharge standard, It is possible to quickly reach the discharge standard of the treated water.

Exemplary ship ballast water treatment apparatus of the present application may further include a medicine storage unit 60 for storing an oxidizing agent to be supplied to the seawater inflow line L1. For example, when the ship is operating in a fresh water area where the practical salinity (psu) is low, it may be difficult to produce sodium hypochlorite in the electrolysis section 20. Therefore, in the chemical storage section 60, To the seawater inflow line (L1), thereby sterilizing the foreign matter or microorganisms in the seawater inflow line (L1).

The oxidizing agent may be at least one selected from the group consisting of sodium diisocyanate (NaDCC), sodium hypochlorite (NaOCl), and calcium hypochlorite (Ca (OCl) 2 ).

In one example, when the oxidizing agent to be fed into the seawater inflow line L 1 in the medicine storage unit 60 is sodium isocyanurate sodium (NaDCC), the reaction occurs according to the following reaction formula 2.

[Reaction Scheme 2]

C 3 N 3 O 3 Cl 2 Na (NaDCC) + 2H 2 O → C 3 N 3 O 3 H 2 Na + 2HOCl

The sodium salt of sodium isocyanurate (NaDCC) used in Reaction Scheme 2 is preferably a solid in the form of powder, and microorganisms in the seawater are killed by dissolving sodium diacetate sodium (NaDCC) in water.

In another example, when the oxidizing agent introduced into the seawater inflow line L1 in the medicine storage unit 60 is sodium hypochlorite (NaOCl), the reaction occurs according to the following reaction formula (3).

[Reaction Scheme 3]

NaOCl + H 2 O → HOCl + Na + OH -

In Scheme 3, HOCl, which occurs when sodium hypochlorite (NaOCl) is dissolved in water, kills microorganisms in the seawater.

In another example, when the oxidizing agent to be fed into the seawater inflow line L 1 in the medicine storage unit 60 is calcium hypochlorite (Ca (OCl) 2 ), the reaction occurs according to the following reaction formula (4).

[Reaction Scheme 4]

Ca (OCl) 2 + 2H 2 O → 2HOCl + Ca +2 + 2OH -

In the above reaction formula 4, calcium hypochlorite (Ca (OCl) 2 ) is preferably a solid in powder form, and microorganisms in seawater by HOCl generated when calcium hypochlorite (Ca (OCl) 2 ) Is killed.

Hereinafter, the operation of the control unit 110 will be described in detail. The control unit 110 may operate as follows according to the actual saline (psu) value measured by the salinity measuring unit 40.

In one embodiment, when the actual salinity (psu) value measured by the salinity measuring unit 40 is 30 or more, the control unit 110 transmits a driving signal of the electrolysis unit 20 to the electrolysis unit 20 . For example, when the practical salinity value of the seawater is 30 psu or more, the treated water containing the above-described concentration of sodium hypochlorite can be generated only by the electrolytic apparatus requiring a small power, Transfers the driving signal to the electrolysis unit 20 so that the treated water containing sodium hypochlorite generated in the electrolysis unit 20 flows into the seawater inflow line through the dilution line L2 to be described later So that the concentration of sodium hypochlorite in the seawater inflow line L1 can be maintained at an appropriate level. In one example, the drive signal may include a signal that controls the drive strength of the electrolysis section 20 according to a utility salinity (psu) value. For example, when the actual salinity value is a relatively low value, the drive strength is controlled to be comparatively strong, and when the actual salinity value is at a relatively high level, the drive strength can be controlled relatively weakly. The electrolytic section 20 receives the signal for controlling the driving strength, so that the treated water containing sodium hypochlorite with the desired concentration in the present application can be generated.

In one embodiment, when the actual salinity (psu) value measured by the salinity measuring unit 40 is less than 30 to more than 10, the controller 110 controls the electrolysis unit 20 so that the electrolysis unit 20 The flow rate signal of the process water can be transmitted to the drive signal and process water storage unit 30. [ For example, it is difficult to effectively sterilize foreign matter or microorganisms in seawater stored in the ballast water storage unit 10 only by driving the electrolysis unit 20 within the practical salt (psu) range. Therefore, by using the treated water of high concentration stored in the treated water storage section 30, it is possible to effectively sterilize foreign matter or microorganisms of seawater stored in the ballast water as described above. In one example, if the actual salinity value is in a relatively low range, for example, in a range of more than 10 to 20, the control unit 110 transmits a signal for increasing the flow rate of treated water to the treated water storage unit 30 The control unit 110 may transmit a signal for reducing the amount of the treated water to the treated water storage unit 30 when the actual salinity value is relatively high, for example, 20 to less than 30. In one example, the flow rate of the treated water can be controlled through the control valve 100.

In one embodiment, when the actual salinity (psu) value measured by the salinity measuring unit 40 is less than 30 to more than 10, the controller 110 controls the saline solution of the saline solution storage unit 50 to be electrolyzed 20 to be transmitted. When the electrolysis unit 20 is driven only by seawater containing the actual salinity (psu) value within the above range, there is a problem that a high electric power is required to generate sodium hypochlorite at a desired concentration in the present invention . In order to solve the above problem, by supplying the electrolytic decomposition unit 20 with a high concentration of brine having a stored practical salinity (psu) value of 30 psu or more in the saline storage unit 50, It is possible to produce treated water containing sodium hypochlorite.

In another embodiment, when the actual salinity (psu) value measured by the salinity measuring unit 40 is 10 or less, the control unit 110 may transmit the process water flow rate signal to the process water storage unit 30 have. The flow rate signal of the treated water may include a control signal for controlling the flow rate of the treated water according to the flow rate value received from the flow rate measuring unit 70 described above. In one example, the flow rate of the treated water can be controlled by the control valve 100.

In another embodiment, when the actual saline (psu) value measured by the salinity measuring unit 40 is 10 or less, the controller 110 controls the oxidizing agent of the chemical storage unit 60 to enter the seawater inflow line L1 It is possible to further transmit the input signal. For example, when a ship navigates a seawater zone having a practical salinity (psu) value of 10 psu or less, the electrolysis unit has difficulty in producing a sufficient concentration of sodium hypochlorite from seawater having a practical salinity value within the range, The storage amount of the treated water stored in the treated water storage unit 30 is also limited. Therefore, it is possible to sterilize the seawater stored in the ballast water storage unit 10 by injecting the oxidizing agent into the seawater inflow line L1.

An exemplary ship ballast water treatment apparatus (1) of the present application includes a discharge line (L4) for discharging the ballast water stored from the ballast water storage unit (10) to the outside; And a neutralizer storage 90 for storing a neutralizer to be supplied to the discharge line L4.

In one example, the discharge line L4 may discharge the ballast water to the outside through the intake port if the stored total remaining-oxidation material in the ballast water satisfies a reference value. The total residual-oxidant reference value may be less than 0.2 ppm, less than 0.1 ppm, or less than 0.01 ppm.

The ship ballast water treatment apparatus 1 further includes a TRO measuring unit 80 for measuring the concentration of total residual oxidant (TRO) in the seawater inflow line L1 and the discharge line L4 As shown in FIG. The TRO measuring unit 80 may transmit the total residue-oxidizing substance measurement value to the control unit 110. [ For example, the controller 110 may transmit a control signal to the neutralizer storage 90 to control the flow rate of the neutralizer according to the total residue-oxidant measurement value.

In one example, when the total residue-oxidant measurement value deviates from the total residue-oxidant reference value, the total residue-oxidant reference value may be reached by using the neutralizer stored in the neutralizer reservoir 90 .

1: Ship ballast water treatment system
L1: Seawater inflow line
L2: Dilution line
L3: Branch line
L4: Discharge line
10: Ship Ballast Water Storage Unit
20:
30: Process water reservoir
40: Salinity measuring unit
50: brine storage part
60: medicine storage unit
70: Flow measuring unit
80: TRO measuring unit
90: Neutralizing agent storage unit
100: Control valve
110:

Claims (12)

A seawater inflow line for introducing seawater from the outside;
A ship ballast water storage unit for storing the seawater introduced from the seawater inflow line;
An electrolysis unit for electrolyzing a part of seawater flowing into the inflow line to generate treated water;
A process water storage unit for storing the process water electrolyzed from the electrolysis unit;
A salinity measuring unit for measuring a saline value (psu) value of seawater flowing from the seawater inflow line;
A salt water storage part for storing saline water to be supplied to the electrolysis part;
A chemical storage unit for storing an oxidizing agent to be supplied to the seawater inflow line;
A control unit for generating a control signal for controlling an amount of treated water flowing out of the driving and treating water storage unit of the electrolysis unit according to the actual salt value (psu) measured by the salt measuring unit; And
And a dilution line for mixing the treated water with seawater flowing into the seawater inflow line,
Wherein the control unit transmits a driving signal of the electrolytic decomposition unit to the electrolysis unit when the measured salinity (psu) value of the salt measurement unit is 30 or more,
Wherein the controller controls the electrolysis unit to send a flow rate signal of the treated water to the driving signal and the treated water storage unit of the electrolysis unit when the measured salinity (psu) A signal for inputting negative brine into the electrolytic apparatus is transmitted,
Wherein the control unit transmits a flow rate signal of the treated water to the treatment water storage unit when the salt value measured by the salinity measurement unit is 10 or less and transmits a signal for inputting the medicine in the medicine storage unit to the sea water inflow line, A ballast water treatment system.
The method according to claim 1,
Wherein the concentration of sodium hypochlorite in the electrolyzed treated water is 30 ppm or more.
The method according to claim 1,
And the capacity of the electrolysis unit is 100 to 1000 m 3 / h.
The method according to claim 1,
Wherein the electrolytic unit has a power amount of 1 to 50 kW.
The method according to claim 1,
Further comprising a branch line through which part of the seawater flowing from the seawater inflow line flows into the electrolysis section.
6. The method of claim 5,
And a control valve is provided in the branch line and the dilution line to control the flow rate of the treated water flowing out to the electrolysis unit and a part of the seawater flowing from the seawater inflow line.
The method according to claim 1,
Wherein the concentration of hypochlorous acid or thromium in the treated water mixed with the seawater flowing into the seawater inflow line is 5 to 15 ppm.
delete delete The method according to claim 1,
Wherein the oxidizing agent is at least one selected from the group consisting of sodium isocyanurate (NaDCC), sodium hypochlorite (NaOCl) and calcium hypochlorite (Ca (OCl) 2 ).
The method according to claim 1,
A discharge line for discharging the ballast water stored from the ballast water storage unit to the outside; And
Further comprising a neutralizer reservoir for storing a neutralizer to be introduced into the discharge line.
12. The method of claim 11,
Further comprising a TRO measuring unit for measuring the concentration of total residual oxidant (TRO) in the seawater inflow line and the discharge line.
KR1020150147728A 2015-10-23 2015-10-23 Apparatus for sterilization of ballast water KR101763351B1 (en)

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KR102082126B1 (en) * 2018-10-12 2020-05-25 (주)케이티마린 A side stream equilibrium water treatment apparatus that controls the sterilization process according to the salinity, enabling sterilization in fresh water, brackish water and sea water
KR102082127B1 (en) * 2018-10-19 2020-02-27 (주)케이티마린 A ballast water treatment system which can sterilize in fresh water, seawater and brackish water
CN110182911B (en) * 2019-06-18 2022-03-29 青岛双瑞海洋环境工程股份有限公司 Ship ballast water treatment control device and method and ship ballast water treatment system
WO2021230458A1 (en) * 2020-05-12 2021-11-18 (주)테크윈 Method for treating ballast water

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