KR101435644B1 - Ship ballast water treatment device calculating flux from pump pressure - Google Patents

Abstract

A ship ballast water treatment apparatus for calculating a flow rate from a pressure of a pump is disclosed. The ballast water treatment apparatus includes a ballast water pump for advancing the ballast water along the main pipe; A pressure gauge for measuring the pressure of the ballast water pump; A ballast water treatment unit for sterilizing the ship ballast water traveling along the main pipe by performing a predetermined treatment; And a control unit for calculating a flow rate from the pressure measured by the pressure gauge using the pressure / flow rate correlation information of the ballast water pump and controlling the degree of processing in the ballast water processing unit based on the flow rate .

Description

Technical Field [0001] The present invention relates to a ship ballast water treatment device for calculating a flow rate from a pump pressure,

The present invention relates to a ship ballast water treatment apparatus for calculating a flow rate from a pump pressure.

For large vessels such as tankers, container ships or LNG carriers, ballast tanks are provided inside the vessel as a means of ensuring the stability and balance of the vessel. In order to balance the ship's balance, sea water (or fresh water) is circulated through a ballast water, a ballast water, Ballast water "). In other words, in case the cargo is unloaded, the ballast water is allowed to flow into the ballast tank, and when the cargo is loaded, the ballast water stored in the ballast tank is discharged so that the balance of the ship can be balanced.

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

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

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

In the case of ship ballast water treatment, the detection of the flow rate is an essential part of the ship ballast water treatment because the concentration of the sterilization liquid and the ultraviolet radiation dose are determined according to the sensed flow rate. Therefore, the ship ballast water treatment apparatus is provided with one or a plurality of flow meters.

Electro-magnetic flowmeters, which are highly accurate in detecting the flow rate of a flow meter, are mainly applied to ship ballast water treatment systems. However, in order to guarantee the accuracy of the flowmeter, there is a limitation in securing a certain section of the front and rear by a straight pipe based on the point where the flowmeter is installed.

1 is a view showing the requirements for securing an intro- duction before and after a flow meter in various cases.

In the case of a reducer pipe, it is not necessary to secure a straight pipe at the front end and the rear end. However, a gate valve fully open, an expander pipe, a Tee pipe, (90-degree bent pipe) and other various valves, it is necessary to acquire intuitively a section of at least 5 times the diameter at the front end and at least 2 times the diameter at the rear end.

Therefore, it is impossible to install such a flow meter in a system in which the arrangement of the piping is complicated or the intuition is not ensured, or the flow rate sensed even if installed is not accurate, so that the injection amount of the sterilizing liquid and the irradiation amount of ultraviolet rays are difficult to control, It may happen that the normal processing of the water is not performed.

Korean Patent Publication No. 10-2010-0017994

The present invention is to provide a ship ballast water treatment apparatus capable of controlling the concentration of a sterilizing liquid or the dose of ultraviolet rays in a ship ballast water treatment process without a flow meter by calculating a flow rate according to a pump pressure from a pressure / flow characteristic curve of the pump.

The present invention is capable of accurately calculating the flow rate even when a flow meter is not accurately installed because the arrangement of piping is complicated or the piping is not secured and the flow meter can not be installed, And to provide a ship ballast water treatment apparatus capable of normal treatment of ship ballast water.

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

According to an aspect of the present invention, there is provided an apparatus for treating ship ballast water, comprising: a ballast water pump for advancing ship ballast water along a main pipeline; A pressure gauge for measuring the pressure of the ballast water pump; A ballast water treatment unit for sterilizing the ship ballast water traveling along the main pipe by performing a predetermined treatment; And a control unit for calculating a flow rate from the pressure measured by the pressure gauge using the pressure / flow rate correlation information of the ballast water pump and controlling the degree of processing in the ballast water processing unit based on the flow rate, A water treatment apparatus is provided.

Wherein the ballast water processing unit includes a sterilizing liquid generating unit for introducing a part of the ballast water from the main pipeline to generate a sterilizing liquid containing residual chlorine in an electrolytic manner and injecting the sterilizing liquid into the main piping, An ultraviolet ray irradiating unit for irradiating the vessel with the ozone generated from the ozone generator, a mixer for mixing the ozone generated from the ozone generator and the injector injected into the main pipe, And an injector for injecting the medicine into the main piping from a storage tank storing a drug having a sterilizing function.

The control unit may control the flow rate of the sterilizing liquid based on the concentration of the sterilizing liquid generated by the sterilizing liquid producing unit, the ultraviolet ray irradiation amount irradiated from the ultraviolet ray irradiating unit, the ozone concentration generated in the ozone generator, You can control more than one.

The pressure gauge may be installed in the ballast pump itself or on the discharge side.

The pressure / flow rate correlation information of the ballast water pump may be a characteristic curve of the ballast water pump programmed and stored in advance.

The ballast water pump may introduce seawater outside the ship into the ballast tank or discharge the ballast water of the ballast tank to the outside of the ship.

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

According to the embodiment of the present invention, it is possible to control the concentration of the sterilizing liquid and the irradiation amount of the ultraviolet ray in the ballast water treatment process without the flow meter by calculating the flow rate according to the pump pressure from the pressure / flow characteristic curve of the pump.

It is possible to accurately calculate the flow rate even if the flow meter is not installed or the flow meter can not be installed even if the flow rate sensing is not accurate, so that the injection amount of the sterilizing liquid and the irradiation amount of ultraviolet rays can be easily controlled, The water can be treated normally.

FIG. 1 is a diagram showing requirements for securing an intro- duction before and after a flow meter in various cases,
FIG. 2 is a diagram showing the concept of a ship ballast water treatment apparatus according to an embodiment of the present invention,
3 is a graph showing the pressure / flow curve of the pump,
FIG. 4 is a flowchart of a method for treating a ship ballast water according to an embodiment of the present invention. FIG.

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

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

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

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

Also, the terms " part, "" module," and the like, which are described in the specification, mean a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

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

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

FIG. 2 is a block diagram showing the concept of a ship ballast water treatment apparatus according to an embodiment of the present invention, and FIG. 3 is a graph showing a pressure / flow curve of a pump.

2, the apparatus for treating a ship ballast water 100, the main pipe 10, the ballast water pump 110, the pressure gauge 120, the sterilizing liquid generator 130, the pretreatment filter 140, The electrolytic solution injector 138, the electrolytic solution injector 138, the electrolytic solution injector 138, the electrolytic solution injector 138, the electrolytic solution injector 138, the electrolytic solution injector 138, , And a control unit 139 are shown.

The ship water ballast water treatment apparatus 100 according to an embodiment of the present invention performs disinfection of ship ballast water using residual chlorine generated by an electrolysis method or disinfection of ship ballast water using an ultraviolet irradiation method The concentration of the sterilizing liquid (the amount of residual chlorine to be produced) or the amount of ultraviolet radiation can be controlled without measuring the flow rate by measuring the pressure of the ballast water pump for drawing ship ballast water into the ship and calculating the flow rate corresponding thereto.

The apparatus for treating ballast water according to one embodiment of the present invention includes a ballast water pump 110, a pressure gauge 120, a sterilizing liquid generator 130, and a controller 139.

The ship ballast water treatment apparatus 100 is connected between a sea chest of a ship and a ballast tank and has a main pipeline 10 as a main path for introducing seawater around the ship into a ballast tank. Further, there is also provided a side pipe 20 which is a secondary path for generating a sterilizing liquid of a predetermined concentration by performing electrolysis by branching a part of the seawater flowing into the ballast tank.

Hereinafter, the flow of ship equilibrium water along the main piping 10 is referred to as a main stream, and the flow of ship equilibrium water along the side piping 20 is referred to as a side stream. In this specification, a description will be made assuming that the sea chest is upstream of the main stream and the ballast tank is downstream of the main stream.

The pre-processing filter 140 filters marine microorganisms upstream of the main stream. While the function of a general filter is performed, marine microorganisms larger than a predetermined size are removed. With the automatic backwash function, it is possible to have a structure and capacity for continuous ship ballast water treatment.

The sterilizing liquid producing unit 130 generates hypochlorous acid by electrolyzing the side stream branched from the main stream and sterilizing the ship ballast water by injecting the hypochlorous acid into the main stream as a sterilizing liquid (electrolyte). That is, the sterilizing liquid generating unit 130 functions as a sterilizing unit.

The sterilizing liquid producing section 130 includes an inflow pump 132, an electrolysis module 134, a rectifying section 135, a gas-liquid separator 136, and an electrolyte injector 138. And may further include at least one of a salt meter 131, a flow control valve 133, and a blower 137 as needed.

The salinity meter 131 measures the salt concentration of the side stream branched from the main stream and transmits the measured sodium concentration to the control unit 139 to control the inflow pump 132 and the flow control valve 133 and the like. Since the amount of hypochlorous acid produced varies depending on the salinity concentration, it may be necessary to vary the flow rate of the side stream depending on the salt concentration for producing a predetermined amount of hypochlorous acid.

The inflow pump 132 provides some of the ballast water supplied from the pretreatment filter 140 to the electrolysis module 134. The inflow pump 132 is disposed in the side piping 20 branched from the upstream side of the main piping 10 and is capable of maintaining a constant pressure such that a stable side stream can be supplied to the electrolysis module 134, May be a booster pump. The flow rate provided by the inflow pump 132 may be adjusted under the control of the control unit 139. [

The flow control valve 133 regulates and supplies the flow rate of the side stream delivered from the inflow pump 132 under the control of the control unit 139. The flow rate control valve 133 may be composed of a plurality of constant flow rate valves for supplying a predetermined flow rate to the electrolysis module 134. The flow rate control valve 133 is controlled by a control unit 139, Some or all of the flow rate valves are selectively opened and closed so that a certain flow rate is supplied to the electrolysis module 134 according to the salt concentration.

The electrolysis module 134 electrolyzes the raw water introduced by the inflow pump 132, that is, the side stream, to generate hypochlorous acid (HClO) corresponding to the sterilizing material. Hypochlorous acid corresponds to the residual chlorine which kills the organisms to be sterilized in the ballast water.

In this process, the electrolysis module 134 can change the concentration of the sterilizing liquid by changing the amount of hypochlorous acid produced according to the current value supplied from the rectifying unit 135.

The electrolysis module 134 includes an anode portion and a cathode portion. Hypochlorous acid is generated in the cathode portion through the electrolysis process using the current supplied from the rectifying portion 135, and by- Hydrogen (H ₂ ), chlorine gas (Cl ₂ ), and the like are produced.

The concentration of hypochlorous acid has a predetermined correlation with the current value applied to the side stream in the electrolysis module 134. The correlation between the current value and the concentration of hypochlorous acid produced may be, for example, in the form of a table or a functional formula (e.g., a linear function such as y = ax where y is the hypochlorous acid concentration, x is the current value, A proportional constant), and may be stored in the control unit 139.

That is, the control unit 139 generates and outputs a control signal based on the correlation between the stored current value and the concentration of hypochlorous acid, thereby controlling the current value supplied from the electrolysis module 134 in the rectifying unit 135 So that the amount of hypochlorous acid produced through electrolysis can be controlled.

The gas-liquid separator 136 removes hydrogen and chlorine gas, which are by-products not related to the equilibrium water treatment, among the substances generated in the electrolysis module 134. That is, the sterilizing liquid containing the high concentration of hypochlorous acid of the liquid component is passed through, and only hydrogen and chlorine gas of the gas component are separated and prevented from being injected into the main stream. The blower 137 is configured to introduce external air to the gas-liquid separator 136 for removal of gas components.

The sterilizing liquid of the liquid component in which the gas component is separated in the gas-liquid separator 136 is injected through the electrolyte injector 138 at the downstream point of the main pipe 10 and mixed into the main stream.

In the main piping 10 located downstream of the main stream, the seawater flowing into the ballast tank is mixed with the sterilizing liquid generated by the sterilizing liquid generating unit 130. The sterilizing liquid generated by the sterilizing liquid producing unit 130 contains hypochlorous acid at a predetermined concentration and merges at a downstream point of the main stream to dilute and completely mix the main stream to have a proper concentration, So that the sterilization treatment for the seawater (main stream) becomes a smoothly performed treated water.

The control unit 139 controls the functions of the components included in the sterilizing liquid generator 130 and / or the ballast water treatment apparatus 100. For example, the control unit 139 may control the pumping operation of the inflow pump 132 and the valve operation of the flow control valve 133 to adjust the amount of sidestream flowing into the electrolysis module 134. The control unit 139 may control the amount of hypochlorous acid generated by the electrolysis module 134, that is, the concentration of the sterilizing liquid, by controlling the current value supplied from the rectifying unit 135 to the electrolysis module 134. The control unit 139 controls the blowing operation of the blower 137 to adjust the amount of outside air flowing into the gas-liquid separator 136. The control unit 139 controls the pre- The degree of filtering of the ballast water can also be adjusted.

In this embodiment, a pressure gauge 120 is installed at the ballast water pump 110 itself or at the rear end (discharge side) thereof, which is connected to the main piping 10 and through which the main stream of the ballast water is pumped by the pumping operation. The pressure gauge 120 measures the pressure of the ballast water pump 110 and transmits the measured value to the control unit 139.

The controller 139 is programmed and stored with a pump characteristic curve relating to a function indicating a correlation between the pump pressure (head H) and the flow rate Q according to the characteristics of the pump, Can be calculated.

As illustrated in FIG. 3, the pressure / flow curve of the pump can be drawn as a function curve, for example, if the pump pressure is 40 m, the flow rate is 70 m ³ / hr.

That is, it is possible to calculate the flow rate corresponding to each pressure from the pressure measured by the pressure gauge 120 installed in the ballast water pump 110 itself or the rear end thereof, so that the ballast water flowing into the ballast water pump 110 without the flow meter, In particular, the flow rate of the main stream can be known. Therefore, the controller 139 can control the sterilizing liquid concentration to be generated by the sterilizing liquid generator 130 without using a flow meter.

Since the pump manufacturer provides the pump characteristic curve for each pump through the pre-delivery test, the accuracy of the pump characteristic curve is high, so that the correlation between the pressure / flow rate of the pump can be controlled in the sterilizing liquid concentration control in the ship water equipments 100 Reliability can be ensured.

4 is a flowchart of a ship ballast water treatment method according to an embodiment of the present invention.

4, in step S210, pressure is measured by a pressure gauge 120 installed on the ballast water pump 110 itself or on the rear end (discharge side) thereof installed in the main pipe 10 for inflow of ballast water, ).

In step S220, the controller 139 preprograms and stores a characteristic curve for the correlation of the pressure / flow rate of the ballast water pump 110, and calculates a flow rate corresponding to the pressure measured by the pressure gauge 120.

In step S230, the control unit 139 determines the calculated flow rate as the flow rate of the main stream, and adjusts the concentration of the sterilizing liquid generated in the sterilizing liquid generating unit 130 so that the ship ballast water treatment can be smoothly performed. That is, the control unit 139 controls the current value of the rectifying unit 135 to adjust the amount of hypochlorous acid produced in the electrolysis module 134 to be the target sterilizing liquid concentration based on the calculated flow rate of the main stream do.

Although the present invention has been described with reference to the case where the ship ballast water treatment method is an electrolysis method, the scope of the present invention is not limited thereto. For example, according to the embodiment, ultraviolet ray irradiation method, ozone injection method, The present invention can be applied to any ship ballast water treatment apparatus that processes fluid such as an injection method.

In the case of the ultraviolet ray irradiation method, the ship ballast water treatment apparatus is a ballast water treatment unit for sterilizing the ship ballast water that proceeds along the main piping by performing a predetermined treatment, and irradiates the ballast water with ultraviolet rays instead of the above- An ultraviolet ray irradiating unit. In the case of the ozone injection system, the ship ballast water treatment apparatus is a ballast water treatment unit which, in place of the sterilization liquid generation unit described above, part of the ship equilibrium water is introduced into the main pipeline and mixed with ozone generated from the ozone generator, And may include an injector injected. In the case of the chemical infusion method, the ship ballast water treatment apparatus is a ballast water treatment unit which, instead of the above-mentioned sterilizing liquid producing unit, removes medicines from a storage tank for storing medicines having a sterilizing function, And injectors injected into the piping.

By calculating the flow rate of the ballast water from the pressure of the ballast water pump measured using a pressure gauge and determining the degree of treatment (ultraviolet radiation amount, ozone injection amount (concentration of ozone mixture solution), drug injection amount, etc.) based on the calculated flow rate, The ship ballast water treatment system will be able to control ultraviolet ray dose, ozone injection amount, drug injection amount, etc. for ballast water treatment without a flow meter.

In this specification, the description has been given mainly of the process in the course of the inflow of the ballast water, but the same technical idea can be applied to the process of discharging the ballast water stored in the ballast tank to the outside.

In measuring the flow rate of the main stream on the piping from the ballast tank to the outside, it is possible to measure the flow without measuring the flowmeter by measuring the pressure of the discharge pump located on the ballast tank side and calculating the flow rate corresponding to the pressure . In this case, the seed chest and ballast tanks shown in FIG. 2 will be changed in position, and the ballast water pump 110 will function as a discharge pump discharging the ballast water in the ballast tank.

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

100: ship ballast water treatment apparatus 110: ballast water pump
120: pressure gauge 130: sterilizing liquid producing part
140: Pretreatment filter 131: Salt meter
132: Inflow pump 133: Flow control valve
134: electrolysis module 135: rectification part
136: gas-liquid separator 137: blower
138: electrolyte injector 139: control unit
10: main piping 20: side piping

Claims (6)

An apparatus for treating ship ballast water,
A ballast pump for advancing the ballast water introduced from the seed chest to the ballast tank along the main pipe;
A pressure gauge for measuring the pressure of the ballast water pump;
A ballast water treatment unit for sterilizing the ship ballast water traveling along the main pipe by performing a predetermined treatment; And
And a control unit for calculating a flow rate from the pressure measured by the pressure gauge using the pressure / flow rate correlation information of the ballast water pump and controlling the degree of processing in the ballast water processing unit based on the flow rate,
A ballast water treatment system installed on a ship in which the flowmeter can not be installed due to the fact that the pipeline does not meet the requirement for straightness before and after the point of installation of the flowmeter. The method according to claim 1,
The ballast water treatment unit includes:
A sterilizing liquid producing unit for introducing a part of the ballast water from the main piping to generate a sterilizing liquid containing residual chlorine by an electrolysis method and injecting the sterilizing liquid into the main piping,
An ultraviolet ray irradiating unit for irradiating the ship ballast water with ultraviolet rays,
An injector for introducing a part of the equilibrium water into the main pipe and mixing the ozone generated from the ozone generator and the mixture liquid into the main pipe;
And an injector for injecting the medicine into the main pipe from a storage tank for storing a medicine having a sterilizing function previously shipped to the vessel for sterilizing the marine equilibrium water. 3. The method of claim 2,
Wherein the control unit, based on the flow rate,
A sterilizing liquid treatment unit for controlling at least one of a sterilization liquid concentration generated in the sterilizing liquid production unit, an ultraviolet ray irradiation amount irradiated from the ultraviolet ray irradiation unit, an ozone concentration generated in the ozone generator, and an amount of medicine injected from the storage tank Device. 4. The method according to any one of claims 1 to 3,
Wherein the pressure gauge is installed in the ballast pump itself or on the discharge side. 4. The method according to any one of claims 1 to 3,
Wherein the pressure / flow rate correlation information of the ballast water pump is a characteristic curve of the ballast water pump programmed and stored in advance. The method according to claim 1,
Wherein the straight pipe securing requirement is at least five times the pipe diameter of the pipe at the front end of the pipe installation expectation point, and at least two times the pipe diameter at the rear end.

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