KR101165275B1 - Ballast water circulation disposal method and system - Google Patents

Abstract

PURPOSE: A method for circulating ballast water and a system for the same are provided to miniaturize an apparatus for treating ballast water and preventing the influence of ballast water treatment to the navigation of a vessel. CONSTITUTION: A plurality of ballast water tanks is filled with ballast water(S1). An apparatus for treating the ballast water is in connection with the ballast tanks using circulating pipes. Ballast water from a first ballast tank is discharged and sterilized. The treated ballast water is supplied to the first ballast water tank. Ballast water from remaining ballast water tanks is successively treated and re-supplied to the ballast water tanks(S2).

Description

Ballast Water Circulation Treatment Method and Treatment System {BALLAST WATER CIRCULATION DISPOSAL METHOD AND SYSTEM}

The present invention is a technique related to the ballast water treatment to prevent environmental damage through the sterilization treatment for the ballast water stored in the ballast water tank when the ship is sailing.

As the trade between countries is active, numerous ships and planes travel around the world. Although cargo is also transported by plane, most cargo is transported by ship, such as large container ships.

In a large ship such as a container ship, a certain weight of seawater is stored in a ballast tank under the ship in order to maintain the balance of the ship when the ship is sailing.

As such, the seawater (or fresh water) stored in the ballast tank for maintaining the balance of the ship is called ballast water.

In general, an appropriate amount of ballast water is stored in a tank near the ship's port of departure, and then the ballast water stored in the tank is discharged from the port of destination.

However, since the ballast water stored in the ballast tanks near the port of departure contains various microorganisms or sludges that live near the port of departure, if discharged as it is, the polluted ecosystem will be disturbed by seriously polluting the destination. .

In other words, the introduction of new species and various pollutants can cause rapid changes in existing marine ecosystems.

In order to solve this problem, international treaties for the regulation and management of ship's ballast water and sediment were adopted to set the discharge standard of ballast water and to reject the discharge of ballast water.

There is a growing international interest in environmental pollution caused by ballast water, and the regulation of ballast water will become more severe. Therefore, there is an increasing need for technology capable of treating ballast water inside ships.

Representative prior art was Republic of Korea Patent No. 10-0743946 "ballast water purification device and the vessel equipped with the device" (hereinafter referred to as the prior art 1), the prior art 1 is stored in the ballast tank of the vessel The ballast water is filtered by a filtration device in a storage step and sterilized by a sterilizer in a discharge step.

In other words, the filtration apparatus filters the large particles of material, and the sterilization apparatus sterilizes various plankton, microorganisms, and the like by ultraviolet irradiation.

Another conventional technique is a "ballast water treatment system" (hereinafter referred to as the prior art 2) of the Republic of Korea Patent No. 10-0947558 No. 2, the prior art 2 comprises a centrifuge, an ultrasonic sterilizer and an ultraviolet sterilizer. .

On the other hand, there is another conventional technology is "Korean ballast water purification method and apparatus" (hereinafter, referred to as the prior art 3) of the Republic of Korea Patent No. 10-0797186, the prior art 3 is filtered the ballast water by centrifugal separator After the sterilization by ultraviolet light, but before the ultraviolet irradiation to dissolve the micro bubble in the ballast water so that the ultraviolet light can act on the ballast water more effectively.

In addition, a number of techniques related to ballast water treatment are known, but most of them are insufficient to meet ballast water emission standards because of their poor efficiency.

Commonly known ballast water treatment methods include ozone (O3), electrolysis, and UV.

The ozone method is a method of sterilizing ballast water using ozone gas, the electrolysis method is a ballast water sterilization method by electrolysis, and the UV method is a method of sterilizing ballast water using ultraviolet rays.

Table 1 is a schematic comparison table of the known water treatment method and the ballast water treatment apparatus applied in the present invention.

division Ozone (O3) Electrolysis UV Invention Initial investment Rather high Rather high Rather high Very low Necessity of Pretreatment Filtration Absolutely necessary Absolutely necessary Absolutely necessary Without need characteristic Sterilization with Ozone Gas Sterilization by Electrolysis UV sterilization O3 + Ultrasonic + Mini Century Cannon (Bubble) Ozone input at the same capacity 100% none none Less than 30% Electricity consumption Very high Highest Very high lowness Comparison of installation area 100% 140% 110% 40% Processing efficiency 85% 85% 80% 100% Noise classification U radish radish radish Maintenance The The The that Pretreatment filter specification 20μm precision filter 20μm precision filter 20μm precision filter BAG filter about 50㎛ Pretreatment Strainer Maintenance Frequent replacement of cartridges or filter media Frequent replacement of cartridges or filter media Frequent replacement of cartridges or filter media Semi-permanent use Microfiltration Requirements of Pretreatment Filters Precision Filtration Requirement Precision Filtration Requirement Precision Filtration Requirement Even fine filtration is low Effect on the main unit in case of poor pretreatment filtration Very high Efficiency falls considerably Highest Irrelevant

Known ozone method, electrolysis method, UV method each has a number of disadvantages, such as low processing efficiency, requires a precise pre-treatment filter, difficult to maintain.

On the other hand, known ballast water treatment methods or treatment devices are to perform the sterilization treatment for the ballast water at the time of storing or discharging the ballast water in the ballast tank.

Therefore, the related arts have a problem that full-scale ballast water is stored in the ballast tank or the ballast water is completely discharged before the operation of the ship is made in earnest.

In particular, when the processing capacity for the ballast water is low, it may cause enormous obstacles to the operation schedule of the ship, and eventually there was a problem that the ballast water is released without properly treating the ballast water to meet the operation schedule.

1. Republic of Korea Patent No. 10-0743946 2. Republic of Korea Patent No. 10-0947558 3. Republic of Korea Patent No. 10-0797186

Therefore, the present invention is to provide a ballast water circulating treatment method and processing system to be able to fill the ballast water once in a plurality of ballast tanks and then sequentially sterilize the ballast water stored in each ballast tank.

In addition, the present invention is to provide a ballast water circulating treatment method and treatment system using a combination of ozone, ultrasonic waves and micro-bubbles to more efficiently sterilize the ballast water to meet the ballast water emission standards.

Ballast water circulating treatment method of the present invention for achieving the problem as described, the ballast water storage step to fill a predetermined amount of ballast water in a plurality of divided ballast tanks; Using a ballast water treatment device connected to each ballast tank and circulation pipe, the ballast water stored in the first ballast tank is discharged and sterilized, and the ballast water treated with the first ballast tank is supplied, and the second ballast tank is supplied from the Nth. And a ballast water sequential treatment step of discharging and resupply the ballast water of each ballast tank sequentially up to the ballast tank.

In addition, the ballast water treatment system of the present invention, a plurality of ballast tanks divided; Circulation pipes connected to the respective ballast tanks; The ballast water is connected to each circulation pipe but comprises a microbubble generator, an ozone dissolved mixer, and an ultrasonic generator. Processing device; characterized in that it comprises a.

In addition, the ballast water treatment system of the present invention is characterized in that it comprises at least two main ballast water treatment device and at least one auxiliary ballast water treatment device provided in advance.

And the ballast water treatment apparatus of the present invention, the ballast water inlet pump; A fine bubble generator for supplying oxygen to the ballast water supplied by the ballast water inlet pump; An ozone dissolved mixer for generating and discharging the second-processed ballast water by uniformly mixing the first-treated ballast water and ozone into which fine bubbles are dissolved and allowing the ozone to be uniformly mixed with the first-treated ballast water; An ozone generator for generating ozone supplied to the ozone dissolved mixer; An ultrasonic generator connected to the discharge side of the ozone dissolved mixer and configured to transmit ultrasonic waves to the secondary treated ballast water; A control unit; Characterized in that it comprises a.

And in the present invention, the ozone dissolved mixer, the body having an inlet side through which the first treated ballast water is introduced and a discharge side through which the second treated ballast water is discharged; A motor coupled to the upper portion of the body; It is provided inside the body, and made of a hollow shaft connected to the motor and a disk coupled to the lower end of the hollow shaft, the outer peripheral surface of the disk is formed with a plurality of outlets in communication with the hollow portion of the hollow shaft is rotated Possible mixing rotors; And an ozone valve for providing ozone supplied from the ozone generator to the hollow portion of the hollow shaft.

And the ballast water circulating treatment system of the present invention, the first ozone dissolved mixer to which the first ballast water treated; A first ultrasonic generator for delivering ultrasonic waves to the second treated ballast water which has passed through the first ozone dissolved mixer; A second ozone dissolved mixer connected to the rear end of the first ultrasonic generator; And a second ultrasonic generator connected to the rear end of the second ozone dissolved mixer.

In addition, the ballast water suspending treatment system of the present invention is configured to pass through a Ph sensor, a temperature sensor, a salinity sensor, a flow sensor, a residual oxide measuring sensor before the treated ballast water enters the ballast tank, and is measured through a local panel indicator. It is characterized in that the various numerical values can be confirmed.

In addition, the ballast water suspend processing system of the present invention is characterized in that the central control room, the control unit and the local panel indicating unit can be connected to operate remotely, and to grasp the processing status of the ballast water.

In addition, the ballast water suspending treatment system of the present invention, so as to control the amount of ozone introduced into the ozone dissolved mixer in proportion to the flow rate of the ballast water based on the value measured through the residual oxide measuring sensor to reduce the residual oxide. PID proportional control controller is provided.

In addition, the ballast water circulating treatment system of the present invention is characterized in that the ballast water inlet pump, microbubble generator, ozone generator, ozone dissolved mixer, ultrasonic wave generator, and control unit are distributed in one or more division compartments of the vessel.

The ballast water circulating treatment method and processing system according to the present invention fills a plurality of ballast tanks in a plurality of ballast tanks so that the ballast water of each ballast tank may be sequentially processed at the time of sailing or berthing of the ship, and thus, due to the ballast water problem. It has no effect on the operation of the aircraft.

In addition, the present invention also has the effect of miniaturizing the ballast processing apparatus because the plurality of ballast tanks are processed sequentially.

In addition, the ballast water treatment apparatus used in the present invention has the effect of sterilizing the ballast water almost completely because the ballast water is sterilized step by step using a combination of fine bubbles, ozone and ultrasonic waves.

In addition, the present invention can be operated with a minimum amount of ozone, there is little noise, and because the filtration characteristics of the pretreatment filter without or without pretreatment filter need not be precise, compared with the existing ballast water treatment device, the quality and price competitiveness is excellent. have.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a process chart of a ballast water circulating treatment method according to the present invention.
2 is a schematic configuration diagram of a ballast water suspending treatment system according to a preferred embodiment of the present invention.
3 is a block diagram of a ballast water treatment apparatus.
4 is a block diagram of an ozone dissolved mixer.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, portions not related to the description are omitted, and like reference numerals are given to similar portions throughout the specification.

Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise.

The ballast water circulating treatment method and treatment system according to the present invention sterilizes various microorganisms contained in ship ballast water, and improves COD, BOD, TN (Total Nitrogen), TP (Total Phosphrous), turbidity, etc. of ballast water. It is a technology to prevent the environmental pollution by making.

In particular, the present invention sterilizes the ballast water stored in the ballast tank in a sequential manner, and uses a ballast water treatment apparatus that uses a combination of microbubbles, ozone and ultrasonic waves to increase the sterilization effect.

First, a ballast water circulating method according to a preferred embodiment of the present invention will be described.

Large vessels having a plurality of ballast tanks will be described as an example, and large vessels such as container ships have a plurality of ballast tanks in the port and starboard at the lower side of the hull.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a process chart of a ballast water circulating treatment method according to the present invention.

The ballast water circulating treatment method according to the present invention comprises a ballast water storing step (S1) and a ballast water sequential processing step (S2).

The ballast water storing step S1 is a step of filling a predetermined amount of ballast water into the plurality of divided ballast tanks T-1 to T-10, respectively. When filling ballast water in each ballast tank (T-1 to T-10), a ballast pump (not shown) may be used, and ballast water may be supplied to each ballast tank through a circulation pipe which will be described later, or through various other methods. Ballast water can be supplied to each ballast tank.

That is, in the ballast water storing step S1, a predetermined amount of ballast water may be filled in each ballast tank by any method and apparatus.

Preferably, when the ballast water is filled in the ballast tank, it is preferable to install a pretreatment filter in the ballast pump so as to filter large particulate matter.

And in the case of the ballast water storage step (S1) it is possible to quickly fill the ballast tank in the ballast tank because the ballast water is not specially treated.

When the ballast water is filled in each ballast tank, the ballast water sequential processing step S2 is performed.

One of the advantages of the present invention is that once the ballast water is filled in a plurality of ballast tanks, the ballast water sequential processing step (S2) is followed in the state in which the ship can be operated. It does not interfere with it.

That is, the present invention has the advantage that it is possible to completely sterilize the ballast water with sufficient time because the ballast tank is sterilized sequentially during the operation of the vessel in the state in which the ballast water is stored in the ballast tank.

Each ballast tank is connected to a predetermined ballast water treatment apparatus by a circulation pipe.

As shown in Figure 2, the port and starboard of the ship is provided with a plurality of ballast tanks, there is an N-th ballast tank from the first ballast tank.

Preferably, two ballast water treatment devices are used to simultaneously treat the ballast tanks of the port and starboard.

By using one or more ballast water treatment devices connected to each ballast tank through a circulation pipe, the ballast water stored in the first ballast tank is first discharged and sterilized, and then supplied to the first ballast tank.

After the ballast water stored in the first ballast tank is sterilized over a predetermined time, the second ballast tank is sterilized, and the Nth ballast tank is sequentially processed repeatedly.

According to the ballast water circulating treatment method of the present invention as described above, the ballast water stored in a plurality of ballast tanks can be sterilized sequentially with sufficient time, and in particular, if the sterilization treatment is performed while the ship is in operation, the power of the ship engine is increased. It can be used to operate the ballast water treatment system, thus preventing additional fuel waste.

Next, a description will be given of a ballast water document processing system according to another aspect of the present invention.

2 is a schematic diagram of a ballast water treatment system according to a preferred embodiment of the present invention, Figure 3 is a block diagram of the ballast water treatment apparatus, Figure 4 is a block diagram of an ozone dissolved mixer.

The ballast water suspending treatment system according to an embodiment of the present invention comprises a plurality of ballast tanks (T-1 to T-10), circulation pipe (A), ballast water treatment device (B).

A plurality of ballast tanks (T-1 ~ T-10) are each divided, are equally provided in the port and starboard of the vessel.

Each ballast tank (T-1 ~ T-10) is connected to the circulation pipe (A), each circulation pipe (A) is connected to the ballast water treatment device (B).

The ballast water treatment apparatus B functions to sterilize the ballast water of the ballast tanks sequentially among the plurality of ballast tanks T-1 to T-10. That is, contaminants including various plankton, microorganisms, and the like contained in the ballast water are treated.

The ballast water treatment apparatus B first sterilizes one of the ballast tanks of the plurality of ballast tanks T-1 to T-10, and then sends the ballast water to the corresponding ballast tanks, and sequentially the remaining ballasts. The tank is also sterilized.

On the other hand, the ballast water treatment device (B) comprises a fine bubble generator 200, ozone dissolved mixer 300, ultrasonic generator 500.

In the present embodiment, the ballast water treatment apparatus B includes a plurality of main ballast water treatment apparatuses B1 and an auxiliary ballast water treatment apparatus B2.

More specifically, two auxiliary ballast water treatment devices B1 are provided to preliminarily provide one auxiliary ballast water treatment device B2.

One of the two main ballast water treatment apparatus B1 is connected to the ballast tanks T-1 to T-10 on the port or starboard side and the circulation pipe A, and the other main ballast water treatment apparatus is It is connected to the other ballast tank and circulation pipe.

For convenience of description, the main ballast water treatment device connected to the port side ballast tanks T-1 to T-5 is called the first main ballast water treatment device B1-1, and the starboard side ballast tanks T-6 to T -10) is called the second main ballast water treatment apparatus B1-2.

On the other hand, the auxiliary ballast water treatment device (B2) is provided in case of any one of the main ballast water treatment device (B1) is broken or under repair, the auxiliary ballast water treatment device (B2) is each main ballast water treatment device It is to be connected to the circulation pipe connected to (B1).

The ballast water flow can be blocked in the circulation pipe A connected to each ballast water tank T-1 to T-10, and each main ballast water treatment device B1 and the auxiliary ballast water treatment device B2. Shut-off valve V is provided.

As shown, each cutoff valve (V) is provided separately from the first cutoff valve (V1) to the 26th cutoff valve (V26).

When the first main ballast water treatment device B1-1 and the second main ballast water treatment device B1-2 operate normally, the first main ballast water treatment device B1-1 is configured as a port side ballast tank T-. 1 to T-5), and the second main ballast water treatment apparatus B1-2 is responsible for the starboard side ballast tanks T-6 to T-10.

Preferably, the first main ballast water treatment apparatus B1-1 and the second main ballast water treatment apparatus B1-2 are operated at the same time to respectively operate the first ballast tank T-1 and the sixth ballast tank T-6. Will be sterilized.

At this time, the first shutoff valve (V1) and the second shutoff valve (V2) of the circulation pipe (A) connected to the first ballast tank (T-1) and the sixth ballast tank (T-6) of the circulation pipe connected to the The 11th shutoff valve V11 and the 12th shutoff valve V12 are opened, and the shutoff valve of the circulation pipe connected to the remaining ballast tank is closed.

Of course, the twenty-third blocking valve V23 connected to the first main ballast treatment apparatus B1-1 is opened and the twenty-fourth blocking valve V24 connected to the second main ballast water treatment apparatus B1-2 is opened.

Therefore, the first ballast tank T-1 and the sixth ballast tank T-6 are sterilized at a predetermined time, for example, about 1 hour. At the end of the prescribed treatment time, the second ballast tank (T-2) and the seventh ballast tank (T-7) are automatically sterilized. In this case, the first shutoff valve (V1) and the second shutoff valve ( V2) and 11th shutoff valve (V11) and 12th shutoff valve (V12) are closed, and 3rd shutoff valve (V3), 4th shutoff valve (V4), 13th shutoff valve (V13) and 14th shutoff valve (V14). ) Is opened.

On the other hand, when the first main ballast water treatment device (B1-1) is broken, the auxiliary ballast water treatment device (B2) is operated to perform sterilization treatment on the port side ballast tanks (T-1 to T-5). Make sure

If the first main ballast water treatment apparatus B1-1 is broken, the twenty-third shutoff valve V23 is closed and the twenty-fifth shutoff valve V25 and the twenty-first shutoff valve V21 are opened to open the port ballast tank. The ballast water of (T-1 to T-5) is directed to the auxiliary ballast water treatment device B2 without passing through the first main ballast water treatment device B1-1.

The configuration of the ballast water treatment apparatus B applied to the embodiment of the present invention is as follows.

The ballast water treatment apparatus B includes a ballast water inlet pump 100, a micro bubble generator 200, an ozone dissolved mixer 300, an ozone generator 400, an ultrasonic generator 500, and a controller 600. .

The ballast water inlet pump 100 is for sucking the ballast water from each ballast tanks T-1 to T-10.

A pretreatment filter 10 may be further provided in the ballast water treatment apparatus B used in the ballast water treatment system according to the embodiment of the present invention.

The pretreatment filter 10 is for filtering relatively large particulate matter contained in the ballast water, and may or may not use the pretreatment filter depending on the water quality of the ballast water stored in the ballast tank.

In the conventional ballast water treatment method using ozone, electrolysis, and ultraviolet rays, which have been proposed by a known technology, a pretreatment filter must be provided, and a precision filter of about 20 μm is used.

On the other hand, in the case of the present invention, the ballast water may be taken directly without passing through the pretreatment filter depending on the water quality, and a filter capable of filtering particulate matter of about 50 μm is sufficient.

When the pretreatment filter 10 is provided, the ballast water inlet pump 100 is provided after the pretreatment filter 10. The ballast water inlet pump 100 is a pump that sucks the ballast water stored in the ballast tank and supplies it to the main pipe.

The microbubble generator 200 for supplying oxygen to the ballast water supplied by the ballast water inlet pump 100 is provided, and the microbubble generator 200 is microbubbles in the ballast water in the form of nano bubbles using external air. To be dissolved.

When the microbubble is supplied to the ballast water flowing at a high flow rate, the dissolved amount of the microbubbles can be increased, and thus the state in which the microbubbles are dissolved in the ballast water is called a ballast water that has been treated first.

When a large amount of oxygen is dissolved in the ballast water, it becomes a state of primary purification by itself, and when the first treated ballast water flows rapidly, some micro-bubbles burst by the cavitation phenomenon to sterilize the microorganisms.

The ozone dissolved mixer 300 is provided next to the microbubble generator 200, and the ozone dissolved mixer 300 generates a first-treated ballast water and ozone to be uniformly mixed to generate a second-treated ballast water.

4 is a block diagram of the ozone dissolved mixer, and includes a body 310, a motor 320, a mixing rotor 330, and an ozone valve 340.

The body 310 has an inlet side 311 and a discharge side 312 and an empty space is formed therein. Firstly processed ballast water is introduced through the inlet side 311, and secondly processed ballast water is discharged through the discharge side 312.

The motor 320 is coupled to the upper portion of the body 310, and the mixing rotor 330 is disposed inside the body 310.

The mixing rotor 330 is connected to the motor 320 to be rotated. Preferably, the mixing rotor 330 is disposed vertically upward in the inner center of the body 310.

More specifically, the mixing rotor 330 is composed of a hollow shaft 331 connected to the motor 320 and a disc 332 coupled to a lower end of the hollow shaft 331, and a hollow shaft ( A plurality of outlets 333 are formed in communication with the hollow portion 331.

That is, the disc 332 has a predetermined thickness, and a cavity part connected to the hollow part of the hollow shaft 331 is formed therein, and has a diameter of about 0.1 to 0.2 mm along the outer peripheral surface of the disc 332. A plurality of outlets 333 are formed. Since each outlet 333 communicates with the cavity, ozone supplied to the hollow shaft 331 is discharged into the body 310 through the outlet 333 via the hollow part and the cavity.

The ozone generator 400 for generating ozone is provided in the treatment apparatus of the present invention, and the detailed description of the ozone generator itself is omitted.

An ozone valve 340 is provided to provide ozone supplied from the ozone generator 400 to the hollow portion of the hollow shaft 331. It is preferable to control the amount of ozone supplied by controlling the opening and closing degree of the ozone valve 340.

The first ballasted water is introduced through the inlet side 311 of the ozone dissolved mixer 300, and ozone is discharged through the outlet 333 of the mixing rotor 330. In particular, since the mixing rotor 330 rotates at a high speed while the first ballast water flows toward the discharge side 312, ozone is discharged from the discharge port 333, so that ozone is dissolved in the first ballast water more smoothly. Can be.

In addition, due to the cavitation phenomenon generated during this process, the ozone bubbles are more finely broken and thus more easily dissolved in the ballast water, so that microorganisms can be sterilized by ozone.

The ultrasonic generator 500 is connected to the discharge side 312 of the ozone dissolved mixer 300, and processes the ballast water introduced by the secondary treatment using the ultrasonic waves generated by the ultrasonic generator 500.

The ultrasonic generator 500 itself is a well-known technique, so a detailed description thereof will be omitted.

The ultrasonic waves generated by the ultrasonic generator 500 act in a direction perpendicular to the flow direction of the ballast water, and when the ultrasonic waves are delivered to the ballast water, a strong cavitation phenomenon is caused.

Although the cavitation phenomenon occurs in the microbubble generator 200 or the ozone dissolved mixer 300 mentioned above, the cavitation phenomenon occurring in the microbubble generator 200 or the ozone dissolved mixer 300 is not only weak in intensity but also limited in the generation area. to be.

On the other hand, when the ultrasonic waves are applied to the ballast water, a stronger cavitation phenomenon occurs, and oxygen and ozone dissolved in the ballast water are more finely broken to form a larger contact area with the ballast water.

That is, ozone and oxygen can be more uniformly and widely dissolved in the ballast water, and through this, the sterilization effect and the purification effect on the ballast water can be improved. In addition, the high temperature and high pressure generated locally during the strong cavitation phenomenon helps to kill various microorganisms more effectively.

The cavitation effect refers to a phenomenon in which a local pressure decreases in a liquid to form a cavity. When ultrasonic waves are applied across the ballast water, a cavity is formed, and a local high temperature and high pressure is formed when the cavity is formed.

The instantaneous cavities burst to break the ozone bubbles and increase the solubility of the ozone by increasing the contact surface area-to-volume ratio of the ozone bubbles, thereby enhancing the sterilizing effect of the microorganisms by ozone.

On the other hand, the oxygen and ozone dissolved in the ballast water is more smoothly burst by the cavitation phenomenon caused by the ultrasonic wave, thereby improving the sterilization efficiency for the ballast water.

The principle of the generation of cavitation by ultrasonic wave and its effect will be described briefly.

The powerful ultrasonic waves applied in the ballast water become small waves and form compressive force (static pressure) and expansion force (negative pressure) repeatedly. Bubbles occur in the ballast water during the negative pressure cycle, and these bubbles disappear in the next compression cycle.

Such bubbles are generated and disappeared tens of thousands of times a second, and the caliber is getting bigger and bigger, causing bubbles to contract and burst into a very large shock wave.

The shock wave generates a large pressure and instantaneous high heat, causing various physical and chemical reactions in the ballast water.

The physical action in the ballast water by ultrasonic waves is as follows.

The ballast water in which oxygen and ozone are dissolved is finely broken under the influence of ultrasonic waves, and the bubble number of oxygen and ozone is increased, thereby maximizing the contact surface area of the ballast water and oxygen and ozone, so that ozone and oxygen can be dissolved more smoothly in the ballast water. To help.

The ozone dissolved in the ballast water is subjected to ultrasonic waves, so that the ozone can be more uniformly dissolved in the ballast water, and thus it is not necessary to increase the amount of ozone unnecessarily increased. In other words, by adding an appropriate amount of ozone to maximize the dissolved rate of ozone can reduce the treatment burden for residual ozone.

The local high temperature and high pressure generated during the cavitation phenomenon leads to the destruction of protein molecules, aromatic hydrocarbons and thiol organic compounds of microorganisms, thereby contributing to the improvement of treatment efficiency for ballast water.

On the other hand, since the sterilization effect by ozone dissolved in the ballast water is well known, detailed description thereof will be omitted.

Ballast water treatment apparatus (B) according to an embodiment of the present invention is provided with a control unit 600, the control unit 600 is a ballast water inlet pump 100, microbubble generator 200, ozone dissolved mixer 300, It is electrically connected to the ultrasonic generator 500, various valves, etc. to enable automatic control of each element.

In constituting the ballast water treatment apparatus B according to the present invention, more preferably, the ozone dissolved mixer 300 and the ultrasonic wave generator 500 may be composed of two or more.

The ozone dissolved mixer 300 is composed of a first ozone dissolved mixer 300a and a second ozone dissolved mixer 300b, and the ultrasonic generator 500 includes a first ultrasonic generator 500a and a second ultrasonic generator 500b. To be done.

A first ozone dissolved mixer 300a is placed next to the microbubble generator 200, followed by a first ultrasonic generator 500a, followed by a second ozone dissolved mixer 300b, followed by a second ultrasonic generator. (500b).

The first processed ballast water flowing through the microbubble generator 200 enters the first ozone dissolved mixer 300a, and the second processed ballast water passes through the first ozone dissolved mixer 300a. Flows into 500a.

The ballast water that has passed through the first ultrasonic generator 500a enters the second ozone dissolved mixer 300b, and a predetermined amount of ozone is introduced again from the second ozone dissolved mixer 300b.

A second ultrasonic generator 500b is provided at the rear end of the second ozone dissolved mixer 300b, and the ballast water having passed through the second ozone dissolved mixer 300b is treated by ultrasonic waves in the second ultrasonic generator 500b again. .

As described above, the ozone dissolved mixer 300 and the ultrasonic generator 500 may be repeatedly provided to continuously treat the ballast water, thereby improving treatment efficiency and processing capacity of the ballast water.

The ballast water passing through the ultrasonic generator 500 is supplied to the ballast tanks T-1 to T-10 along the circulation pipe A.

The water quality of the ballast water treated by the ballast water treatment apparatus B according to the present invention is improved, and various microorganisms included in the ballast water are sterilized and killed.

Preferably, the treated ballast water can be used to check the degree of treatment of the ballast water using various sensors before entering the ballast tank.

To this end, a Ph sensor, a temperature sensor, a salinity sensor, a flow sensor, an oxide residue measuring sensor, a COD measuring sensor, a BOD measuring sensor, and a circulating pipe (A) connected to each ballast tank (T-1 to T-10) To provide a turbidity measurement sensor and the like, it is possible to check the various values measured by the various sensors (K) through the local panel indicator 700 connected to the control unit 600.

In addition, it is preferable that the ballast water treatment apparatus B of the present invention can be operated remotely from the central control room 800.

For this purpose, the control unit 600 and the local panel indicating unit 700 are connected to the central control room 800 so that the operation of the processing apparatus can be controlled remotely from the central control room 800, and the processing status of the ballast water is monitored. Do it.

In addition, the PID proportional control controller (C) for controlling the amount of ozone introduced to the ozone dissolved mixer 300 in proportion to the flow rate of the ballast water based on the residual oxide value measured through the residual oxide measuring sensor. Get ready.

PID control is an abbreviation of Proportional Integral Differential control, which means proportional integral derivative control, and feedback control is performed by combining these three properly.

The basic method of PID control is to (1) measure the output value of the control target, (2) compare the target value, (3) measure the error, and then (4) control it.

That is, the target value of the residual oxide is defined in an appropriate range, and the input amount of ozone is determined in consideration of the flow rate of the ballast water while comparing the target value with the value measured by the residual oxide measuring sensor.

PID proportional control prevents unnecessary oxides from increasing and prevents excessive use of ozone.

More preferably, in configuring the ballast water treatment apparatus B of the present invention, the ballast water inlet pump 100, the microbubble generator 200, the ozone generator 400, the ozone dissolved mixer 300, the ultrasonic generator 500 Each of the elements constituting the present processing apparatus, such as the control unit 600, is distributed in a plurality of division compartments provided in the vessel, and then connected to each other so as to be operated.

It is possible to provide one or more of the components constituting the processing apparatus in one division compartment in a plurality of division compartments.

In general, the larger the vessel, the greater the number of ballast tanks, so the capacity of the ballast water treatment system should be increased accordingly. However, it is not easy to install an enlarged ballast water treatment device in a compartment of a ship, and consolidation of the compartment may cause problems in the structural stability of the ship.

In this aspect, the present invention can provide a ballast water treatment device that is convenient for maintenance without damaging the basic structure of the ship by distributing the components constituting the treatment device in a plurality of division compartments of the ship and then connecting them. Make sure

As described above, the ballast water circulating treatment system according to the present invention can improve the sterilization efficiency for the ballast water through a ballast water treatment device different from the conventional one, and to sequentially process the ballast water stored in each ballast tank. As a result, the ballast water can be sterilized with sufficient time without disturbing the ship's sailing schedule.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be.

It is therefore to be understood that the embodiments described above are intended to be illustrative, but not limiting, in all respects. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

The present invention may be installed in a ship and used for sterilization of ballast water.

S1: Ballast water storage step
S2: Ballast Water Sequential Processing Step
T-1 ~ T-10: Ballast tank A: Circulation piping
B: Ballast Water Treatment B1: Main Ballast Water Treatment
B2: Auxiliary Ballast Water Treatment System
B1-1: first main ballast water treatment device B1-2: second main ballast water treatment device
V: Shut-off valve
100: ballast water pump 200: fine bubble generator
300: ozone dissolved mixer 300a: first ozone dissolved mixer
300b: the second ozone dissolved mixer 310: the body
311: inlet side 312: discharge side
320: motor 330: mixing rotor
331: hollow shaft 332: disc
333: outlet 340: ozone valve
400: ozone generator 500: ultrasonic generator
500a: first ultrasonic generator 500b: second ultrasonic generator
600: control unit 700: local panel indicating unit
800: central control room C: PID proportional controller
K: Various sensors
10: pretreatment filter

Claims (10)

In the ballast water treatment method,
A ballast water storage step of filling a plurality of divided ballast tanks with a predetermined amount of ballast water;
Using a ballast water treatment device connected to each ballast tank and circulation pipe, the ballast water stored in the first ballast tank is discharged and sterilized, and the ballast water treated with the first ballast tank is supplied, and the second ballast tank is supplied from the Nth. Ballast water sequential processing step of discharging the ballast water of each ballast tank sequentially to the ballast tank to sterilize and resupply the ballast water. In the ballast water treatment system,
A plurality of ballast tanks separated;
Circulation pipes connected to the respective ballast tanks;
The ballast water is connected to each circulation pipe but comprises a microbubble generator, an ozone dissolved mixer, and an ultrasonic generator. Ballast water document processing system comprising a; processing apparatus. The method of claim 2,
The ballast water document processing system,
A ballast water treatment processing system comprising at least two main ballast water treatment device that is operated at the same time and at least one auxiliary ballast water treatment device provided in advance. The method of claim 2,
The ballast water treatment device,
Ballast water inlet pump;
A fine bubble generator for supplying oxygen to the ballast water supplied by the ballast water inlet pump;
An ozone dissolved mixer for generating and discharging the second-processed ballast water by uniformly mixing the first-treated ballast water and ozone into which fine bubbles are dissolved and allowing the ozone to be uniformly mixed with the first-treated ballast water;
An ozone generator for generating ozone supplied to the ozone dissolved mixer;
An ultrasonic generator connected to the discharge side of the ozone dissolved mixer and configured to transmit ultrasonic waves to the secondary treated ballast water;
A control unit; Ballast water document processing system comprising a. The method of claim 4, wherein
The ozone dissolved mixer,
A body having an inlet side through which the first treated ballast water is introduced and a discharge side through which the second processed ballast water is discharged;
A motor coupled to the upper portion of the body;
It is provided inside the body, and made of a hollow shaft connected to the motor and a disk coupled to the lower end of the hollow shaft, the outer peripheral surface of the disk is formed with a plurality of outlets in communication with the hollow portion of the hollow shaft is rotated Possible mixing rotors;
And an ozone valve for providing ozone supplied from the ozone generator to the hollow portion of the hollow shaft. The method of claim 4, wherein
The ballast water document processing system,
A first ozone dissolved mixer in which first treated ballast water flows;
A first ultrasonic generator for delivering ultrasonic waves to the second treated ballast water which has passed through the first ozone dissolved mixer;
A second ozone dissolved mixer connected to the rear end of the first ultrasonic generator;
And a second ultrasonic generator connected to the rear end of the second ozone dissolved mixer. 2. The method according to any one of claims 4 to 6,
The ballast water document processing system,
The ballast, which is configured to go through Ph sensor, temperature sensor, salinity sensor, flow sensor and residual oxide measuring sensor before the ballast water enters the ballast tank, is characterized in that it is possible to check various values measured through the local panel indicator. Can circulating processing system. The method of claim 7, wherein
The ballast water document processing system,
A ballast water succulent processing system, characterized in that the central control room, the control unit and the local panel indicating unit is connected to enable remote operation and to grasp the processing status of the ballast water. The method of claim 7, wherein
The ballast water document processing system,
Ballast, characterized in that the PID proportional control controller is provided to control the amount of ozone introduced to the ozone dissolved mixer in proportion to the flow rate of the ballast water based on the value measured by the residual oxide measuring sensor to reduce the residual oxide Can circulating processing system. The method according to any one of claims 4 to 6,
The ballast water document processing system,
The ballast water inlet pump, microbubble generator, ozone generator, ozone dissolved mixer, ultrasonic generator, the control unit is distributed one or more ballast water suspension treatment system, characterized in that arranged in one or more compartments of the vessel.

Images