KR20150068634A - Sea water treatment apparatus of marine structure and sea water treatment method using the saem - Google Patents

Abstract

The present invention relates to a sea water treatment apparatus of a marine structure and a sea water treatment method using the same, which can readjust the amount of ozone by treating sea water by mixing sea water which passes through a sea chest with ozone, and then receiving feedback on concentration of residual harmful organisms in the treated sea water. According to an embodiment of the present invention, provided is a sea water treatment apparatus of a marine structure, comprising: a main line for transporting sea water which passes through a sea chest of a marine structure to a ballast water tank; an ozone injection line for injecting ozone into the main line; a first measuring device installed in the main line for measuring concentration of harmful organisms contained in the sea water passing through the sea chest; and a control unit for determining the amount of ozone to be injected into the main line with respect to the concentration of harmful organisms received from the first measuring device.

Description

TECHNICAL FIELD [0001] The present invention relates to a seawater treatment apparatus for an offshore structure, and a seawater treatment method using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002]

More particularly, the present invention relates to an apparatus for treating seawater in an offshore structure, and more particularly, to a method for treating seawater in an offshore structure, The present invention relates to a seawater treatment apparatus for an offshore structure and a method for treating seawater using the same.

The cargo ship is operated with ballast water tank filled with seawater in order to improve the operation, balancing and stability of the propeller and rudder in water when there is not enough shipping cargo. In the ballast water tank, It is generally called ballast water.

The ballast water is the weight to be loaded to adjust the ship's draft and trim (forward and backward inclination of the ship) and it will function to improve balance and stability of the ship. If the ship is not loaded sufficiently, In order to effectively operate the system.

Ballast water has been in use since the late 1870s when ships began to be constructed of steel. In some cases, ballast is used as ore or sand as ballast without loading ballast water depending on the vessel, but today, using sea water or fresh water as ballast It is universal.

On the other hand, ballast water to be taken in seawater or fresh water from a port, a waterway or the ocean and loaded into the ballast water tank contains various harmful organisms normally contained in seawater or fresh water and they are taken together with the ballast water, Water tank. Water intake and discharge of ballast water may differ depending on the degree of industrial development and availability of resources etc. of the country to which the vessel is sailing. Due to the nature of the ship, there is a possibility that a large number of tankers or bulk carriers , There is a high possibility that raw material exporting countries such as oil producing countries or iron ore are exposed to risks of various pathogenic bacteria and foreign harmful species that are infested with ballast water as compared with importing countries. According to data from the International Maritime Organization (IMO), it is estimated that more than 10 billion tonnes of ballast water are transported globally every year.

The biggest problem with ballast water is basically that ballast water is used as a medium to propagate foreign harmful species such as organisms or pathogens in specific sea areas contained in ballast water, And it is transferred to the sea area, causing the side effect of disturbing the environment and the ecosystem of the sea area.

Problems caused by transboundary movements of these species in the ballast water not only lead to ecosystem disturbances but also to the coastal industry and other commercial activities or resources.

List the problems caused by ballast water to destroy or disturb existing native ecosystems, threaten fishery resources and human health by pathogens and toxic organisms, and eliminate enormous loss of biological species or other aquatic economies There is a problem that causes damage caused.

In order to solve the above-mentioned problem, the conventional seawater processing apparatus sterilized the seawater passing through the septic trough and supplied it to the ballast water tank.

However, in the conventional seawater treatment apparatus, only ozone is injected to sterilize the seaweed having passed through the septic stream, and it has not been possible to confirm whether or not the harmful organisms contained in the seawater have been completely removed or the remaining harmful organisms are present by the injected ozone amount.

Therefore, there is a need for an improved seawater treatment device capable of killing harmful organisms contained in seawater by regulating the ozone injection amount by feeding back the residual harmful biological concentration of the seawater after mixing the seaweed with the ozone, .

Korean Registered Patent No. 0812486 (Mar. 4, 2008) "Ozone Injection Method and System"

An object of the present invention is to provide an ozone depleting apparatus capable of killing harmful organisms contained in seawater by regulating the ozone amount by mixing seawater having passed through the septic stream with ozone and then treating the seawater with residual ozone concentration And a method for treating sea water using the same.

According to an aspect of the present invention, there is provided a ballast water treatment system comprising: a main line through which seawater having passed through a sea chest of an offshore structure is transferred to a ballast water tank; An ozone injection line for injecting ozone into the main line; A first measuring unit installed in the main line for measuring a concentration of noxious organisms contained in seawater having passed through the body test; And a control unit for determining an amount of ozone to be injected into the main line according to the concentration of the harmful bio-received from the first measuring device.

According to an embodiment of the present invention, the apparatus for treating seawater of an offshore structure further includes a detour line branched from the main line and connected to the main line after the ozone is injected through the ozone injection line.

According to an embodiment of the present invention, the apparatus for treating seawater in an offshore structure further includes a mixer installed in the bypass line for mixing ozone injected into the bypass line with seawater bypassed from the main line.

According to another embodiment of the present invention, there is provided a seawater treatment system for an offshore structure, comprising: a vessel for mixing a part of seawater in the main line with seawater mixed with ozone, 2 meter, and the control unit judges whether or not the remaining noxious biological concentration received from the second measuring instrument is out of a preset reference range, and when the ozone amount deviates from the reference range as a result of the judgment, More control is preferred.

According to an embodiment of the present invention, the apparatus for treating seawater of an offshore structure further includes an electrolyzer for electrolyzing seawater mixed with ozone by the mixer.

Preferably, the first measuring device is installed before a branching point branched from the main line to the detour line.

And the second measuring device is installed after a connecting point at which the main line and the bypass line are connected.

Preferably, the bypass line includes a venturi tube, and ozone injected through the ozone injection line is injected into the bypass line through the venturi tube.

Wherein the bypass line is provided with a flow control valve for interrupting the amount of seawater being diverted and bypassed from the main line, and wherein the control unit is operable to control the flow control valve when the concentration of the pesticide received from the first meter is within a predetermined reference range And controls the ozone valve installed in the flow control valve and the ozone injection line in accordance with the measured concentration of the harmful biological when the concentration of the harmful biological received from the first meter is out of a preset reference range .

According to another embodiment of the present invention, there is provided a marine structure including a main line through which sea water passing through a sea chest of an offshore structure is transferred to a ballast water tank, and a marine vessel including an ozone injection line for injecting ozone into the main line 1. A seawater treatment method using a seawater treatment device of a structure, the method comprising: a control unit receiving from a first measuring device a pesticidal concentration contained in seawater passing through the septic stream; And the control unit includes a step of determining an amount of ozone to be injected into the main line according to the concentration of the harmful bio-received.

Wherein the determining unit determines that the control unit determines that the remaining portion of the seawater of the main line and the ozone mixed with the ozone are remixed and the concentration of the remaining noxious organisms contained in the seawater supplied to the ballast water tank is measured, Receiving a pesticidal concentration; The control unit judges whether or not the remaining harmful biological concentration received from the second measuring device is out of a preset reference range; And adjusting the amount of ozone to be injected into the main line when the control unit is out of the reference range as a result of the determining step.

And the determining step adjusts the opening degree of the ozone valve installed in the ozone injection line so as to be injected into the main line by the determined ozone amount.

Wherein the determining step comprises the steps of: the control unit determining whether or not the concentration of the pesticide received from the first measuring device is out of a preset reference range; And the control unit controls the flow control valve to close the flow control valve that interrupts the seawater amount that is diverted and bypassed from the main line when the received pesticide concentration is within the reference range as a result of the determining step, And controlling the ozone valve installed in the flow control valve and the ozone injection line in accordance with the received harmful biological concentration when the biological concentration is out of the reference range.

According to the embodiment of the present invention, there is an effect that the harmful organisms contained in the seawater can be killed by mixing the seaweed having passed through the septic stream with ozone to treat the seawater, and then regulating the ozone amount by feeding back the residual toxic concentration of the seawater .

In addition, according to the embodiment of the present invention, since the first measuring device for measuring the concentration of harmful biological substances included in the seawater is provided before the branching point branched from the main line to the bypass line, the concentration of the harmful biological substances contained in the seawater passing through the body- Accordingly, the amount of ozone to be injected into the main line can be precisely determined.

According to the embodiment of the present invention, since the second measuring device is installed after the connection point where the main line and the bypass line are connected, the concentration of the harmful organisms remaining in the water treated by mixing with the ozone is measured and the ozone amount is readjusted, It is possible to control the amount of ozone.

Also, according to the embodiment of the present invention, electrolysis of seawater mixed with ozone can improve the treatment efficiency of harmful organisms contained in seawater.

Also, according to the embodiment of the present invention, since ozone injected through the ozone injection line is injected into the bypass line through the venturi pipe, the ozone can be easily injected into the bypass line.

According to the embodiment of the present invention, when the concentration of the harmful bio-received from the first measuring device is within a predetermined reference range, it is possible to supply seawater to the ballast water tank without water treatment through the main line as the flow control valve is closed .

1 is a view for explaining an apparatus for treating a marine structure according to an embodiment of the present invention,
2 is a view for explaining a marine structure seawater treatment apparatus according to another embodiment of the present invention,
3 is a view for explaining a marine structure seawater treatment apparatus according to another embodiment of the present invention, and FIG.
FIG. 4 is a flowchart illustrating a method for treating sea water using an apparatus for treating a marine structure according to another embodiment of the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining an apparatus for treating a marine structure according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus for treating seawater of an offshore structure according to an embodiment of the present invention includes a main line L1 through which sea water, that is, ballast water passing through a body stream 11 is transferred to a ballast water tank 15, And an ozone injection line L3 for injecting ozone into the line L1.

The seawater treatment system of the offshore structure further includes a detour line L2 branched from the main line L1 and connected to the main line L1 after the ozone is injected through the ozone injection line L3.

A seawater pump (P1) is installed to supply seawater having passed through the body stream (11). The seawater supplied through the seawater pump P1 is transferred to the main line L1 and the bypass line L2.

The first measuring instrument 12 is installed before the branch point branched from the main line L1 to the bypass line L2. The first measuring instrument 12 is a means for measuring the concentration of harmful biological matter contained in the seawater having passed through the body stest 11. The pest concentration measured through the first measuring instrument 12 is transmitted to the control unit 16.

The control unit 16 determines the amount of ozone injected into the main line L1 on the basis of the concentration of the harmful biological substance specified from the first measuring instrument 12. At this time, the amount of ozone can be predetermined by the concentration of harmful organisms.

The control unit 16 also provides a valve control signal indicating the valve opening degree to the valve controller 18 that controls the ozone valve B3 installed in the ozone injection line L3 so that the determined amount of ozone is injected into the main line L1 do.

On the other hand, the control unit 16 includes a valve controller 19 for controlling the first and second measuring devices 12 and 21, the ozone generator 16, the seawater valve B1, Is communicatively coupled to a valve controller (17) that controls a flow regulating valve (B2) that is interposed in the bypass line (L2) and interrupts the amount of seawater bypassed.

The ozone valve (B3) can control the amount of ozone injected from the ozone generator (13). The ozone valve B3 is installed in the ozone injection line L3 installed to be connected to the bypass line L2.

The bypass line (L2) is provided with a venturi pipe (20) near a point connected to the ozone injection line (L3) so as to suck ozone passing through the ozone valve (B3). In the venturi pipe 20, the flow rate of the fluid at the point at which the diameter of the pipe is reduced and the pressure is lowered as the diameter of the pipe is gradually reduced and then enlarged. Therefore, the ozone injection line L3, Can be injected into the bypass line (L2).

The flow control valve B2 is connected to the bypass line 12 branched from the main line L1 and located above the main line L1 and connected to the bypass line L2 and the ozone injection line L3 It is installed before the branch office.

The flow control valve B2 is opened and closed under the control of the control unit 16. [

The control unit 16 controls the flow control valve B2 to close when the concentration of the harmful biological matter of the seawater measured from the first meter 12 is within the predetermined reference range, So as to open the flow control valve B2 and the ozone valve B3. At this time, the opening degree of the flow control valve B2 and the opening degree information of the ozone valve B2 are determined for each noxious biological concentration.

The seawater in the bypass line L2 branched from the main line L1 and passing through the flow control valve B2 is mixed with the ozone passing through the ozone valve B3 and the mixer 14 installed in the bypass line L2 .

Sea water mixed with ozone by the mixer 14 can be electrolyzed via the electrolytic device 30 as shown in Fig. The electrolyzed seawater is electrolyzed by the electrolytic device 30 and is remixed with the seawater of the main line L1. By electrolyzing seawater mixed with ozone, the harmful organisms contained in the seawater can almost completely be killed and the degree of sterilization can be further doubled.

Here, the electrolytic apparatus 30 is a device for converting sodium chloride (NaCl) contained in seawater into sodium hypochlorite (NaOCl) to kill harmful organisms. As an example of the oxidizing agent, sodium hypochlorite (NaOCl) is exemplified, but an oxidizing agent obtained by using chloride ion generated in the electrolysis of seawater may be included.

3 is an example in which the position of the electrolytic device 30 is located at a position prior to the mixer 14, and electrolyzed sea water and ozone are electrolyzed through the electrolytic device 30. [ The electrolyzed seawater electrolyzed by the electrolyzer 30 is mixed with the mixer 14 and then mixed with the seawater of the main line L1.

The sea water mixed with the ozone by the mixer 14 is remixed with the seawater of the main line L1. The second measuring device 21 measures whether or not residual harmful organisms are present in the re-mixed seawater. The second measuring device 21 can be installed after the connection point where the main line L1 and the bypass line L2 are connected to measure the concentration of the remaining noxious organisms in the first-order water-treated seawater.

The residual pesticidal concentration measured through the second measuring device 21 is transmitted to the control unit 16. [ The control unit 16 receives feedback of the remaining harmful bio-concentration with respect to the primary water-treated seawater, and can regulate the amount of ozone to be injected into the main line L1.

More specifically, the control unit 16 determines whether or not the concentration of remaining harmful organisms received from the second measuring device 21 exceeds a preset reference range, and determines the degree of opening of the ozone valve B3 according to the deviation from the reference range .

Therefore, if there is residual harmful organisms in the first treated water, it is possible to re-adjust the amount of ozone in an optimal state.

The seawater stored in the ballast water tank 15 can be discharged through the seawater discharge pump P2 to the sea or overboard.

The thick lines in Figs. 1 to 3 denote the piping system diagrams, and the thin lines indicate the control system diagram transmitted to the control unit 16 or outputted from the control unit 16. Fig.

A method of treating seawater using the seawater treatment apparatus of an offshore structure having such a structure will now be described with reference to FIG.

FIG. 4 is a flowchart illustrating a method of treating seawater using an apparatus for treating a marine structure according to another embodiment of the present invention.

Referring to FIG. 4, the control unit 16 receives the pesticide concentration included in the measured seawater from the first measuring instrument 12 installed before the branching point branched from the main line L1 to the detour line (S11). The first measuring instrument 12 is a measuring means for measuring the concentration of harmful biological matter contained in the seawater having passed through the body stest 11, and the measured harmful biological concentration is transmitted to the control unit 16.

The control unit 16 determines the amount of ozone to be injected into the main line L1 based on the received harmful biological concentration (S13). Although it is described here that the amount of ozone is determined, the amount of seawater can be determined together. However, the control unit 16 controls to close the flow control valve B2 and the ozone valve B3 described above when the received pesticidal concentration is within the preset reference range.

The control unit 16 controls the degree of opening of the ozone valve B3 provided in the ozone injection line L3 so that the determined amount of ozone can pass through the ozone injection line L3 (S15). At this time, not only the ozone valve B3 but also the flow control valve B2 controls the opening degree. The seawater having passed through the flow control valve B2 passes through the ozone valve B3 installed in the ozone injection line L3 and is conveyed to the mixer 14 while meeting the ozone injected into the bypass line L2. In the mixer 14, harmful substances included in seawater can be primarily sterilized by mixing ozone and seawater.

Thereafter, the ozone-mixed seawater is remixed by the mixer 14 and the seawater transferred without being bypassed in the main line (L2). The re-mixed seawater is supplied to the ballast water tank (15).

The control unit 16 receives the remaining harmful biological concentration contained in the re-mixed seawater from the second measuring instrument 21 installed after the connection point where the main line L1 and the bypass line L2 are connected (S17).

The control unit 16 determines whether or not the received remaining harmful biological concentration is out of a preset reference range (S19).

If it is determined in step S19 that the received remaining noxious biological concentration does not exceed the preset reference range, the control unit 16 controls the ozone valve B3 to maintain the ozone amount determined in step S13.

As a result of the determination in step S19, when the received residual pesticidal concentration is out of a preset reference range, the control unit 16 controls the ozone valve B3 to readjust the ozone amount according to the residual pesticidal concentration (step S21) .

In this way, in order to remove harmful substances contained in the seawater passing through the coreschaft 11, when additional control is required based on the feedback result on the amount of ozone injected at the time of injecting ozone, .

The invention being thus described, it will be obvious that the same way may be varied in many ways. Such modifications are intended to be within the spirit and scope of the invention as defined by the appended claims.

11: Chastest 12: First measuring instrument
13: ozone generator 14: mixer
15: ballast water tank 16: control unit
17, 18, 19: valve controller 20: venturi tube
21: Second measuring instrument L1: Main line
L2: bypass line L3: ozone injection line

Claims (13)

The main line through which seawater passing through the sea chest of the offshore structure is transferred to the ballast tanks;
An ozone injection line for injecting ozone into the main line;
A first measuring unit installed in the main line for measuring a concentration of noxious organisms contained in seawater having passed through the body test; And
And a control unit for determining an amount of ozone to be injected into the main line according to a concentration of the harmful bio-received from the first measuring device. The method according to claim 1,
Further comprising a bypass line branched from the main line and connected to the main line after ozone is injected through the ozone injection line. The method of claim 2,
Further comprising a mixer installed in the bypass line for mixing ozone injected into the bypass line with seawater bypassed from the main line. The method of claim 3,
Further comprising a second measuring unit for measuring a concentration of residual harmful bio-generated water in the seawater supplied to the ballast water tank by re-mixing the seawater mixed with the ozone,
Wherein the control unit judges whether or not the remaining harmful biological concentration received from the second measuring device is out of a predetermined reference range and further adjusts the amount of ozone to be injected into the main line when the determination result is out of the reference range Seawater treatment equipment for offshore structures. The method of claim 3,
Further comprising an electrolytic device for electrolyzing seawater mixed with ozone by the mixer. The method according to claim 1,
Wherein the first measuring instrument is installed before a branch point branched from the main line to the detour line. The method according to claim 2 or 4,
Wherein the second measuring instrument is installed after a connection point where the main line and the bypass line are connected. The method of claim 2,
Wherein the bypass line includes a venturi tube,
And the ozone injected through the ozone injection line is injected into the bypass line through the venturi pipe. The method of claim 2,
Wherein the bypass line is provided with a flow control valve for interrupting the amount of seawater diverted from the main line and bypassed,
Wherein the control unit controls the flow control valve to close when the concentration of the harmful bio-received from the first meter is within a predetermined reference range, and when the concentration of the harmful bio-received from the first meter deviates from a predetermined reference range, And controls the ozone valve installed in the flow control valve and the ozone injection line in accordance with the concentration of the harmful biological matter. A seawater treatment method using a seawater treatment apparatus of an offshore structure including a main line through which seawater having passed through a sea chest of an offshore structure is transferred to a ballast water tank and an ozone injection line for injecting ozone into the main line As a result,
The control unit receiving the pest concentration contained in the seawater passing through the body test from the first measuring instrument; And
Wherein the control unit includes a step of determining an amount of ozone to be injected into the main line according to the concentration of the harmful bio-received. The method of claim 10,
The step of determining
The control unit receives the remaining harmful organism concentration from the second measuring unit that measures the concentration of the remaining harmful organisms contained in the seawater supplied to the ballast water tank by re-mixing part of the seawater of the main line and the ozone- ;
The control unit judges whether or not the remaining harmful biological concentration received from the second measuring device is out of a preset reference range; And
Further comprising the step of controlling the ozone amount to be injected into the main line when the control unit is out of the reference range as a result of the determining step. The method of claim 10,
The step of determining
Wherein the degree of opening of the ozone valve installed in the ozone injection line is adjusted to be injected into the main line by the determined ozone amount. The method of claim 10,
The step of determining
Wherein the control unit determines whether the concentration of the harmful organism received from the first measuring device is out of a preset reference range; And
The control unit controls the flow control valve to close the flow control valve that interrupts the seawater amount that is diverted and bypassed from the main line when the received pesticide concentration is within the reference range as a result of the determination, And controlling the ozone valve installed in the flow control valve and the ozone injection line in accordance with the concentration of the harmful bio-received when the concentration of the ozone is outside the reference range. Processing method.

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