KR101584051B1 - Apparatus and method for treating ballast water considering tubidity of ballast water - Google Patents

Abstract

The present invention relates to an apparatus and a method for treating ballast water, and more particularly to a sterilizing unit for ultraviolet sterilizing inflowed ballast water and a sterilizing unit for sterilizing the sterilizing unit And a retention time adjusting unit for maintaining the ultraviolet irradiation amount of the ballast water constant by adjusting the time of the ballast water staying in the sterilizing unit, so that the ultraviolet irradiation amount is always kept constant in the sterilizing unit, thereby improving the sterilizing effect of the ballast water The present invention relates to a ballast water treatment apparatus and method therefor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ballast water treatment apparatus and a ballast water treatment apparatus,

The present invention relates to an apparatus and a method for treating ballast water, and more particularly to a sterilizing unit for ultraviolet sterilizing inflowed ballast water and a sterilizing unit for sterilizing the sterilizing unit And a retention time adjusting unit for maintaining the ultraviolet irradiation amount of the ballast water constant by adjusting the time of the ballast water staying in the sterilizing unit, so that the ultraviolet irradiation amount is always kept constant in the sterilizing unit, thereby improving the sterilizing effect of the ballast water The present invention relates to a ballast water treatment apparatus and method therefor.

Ballast water means seawater filled in the ballast tanks in order to maintain the balance of the ship when the ship is operated without luggage. With the increase of international trade volume, the marine transportation ratio is increasing, and as the number of vessels increases and the size of vessels increases rapidly, the volume of ballast water used by vessels is greatly increasing. As the amount of ballast water used in vessels increases, the number of cases of harms caused by marine ecosystems due to foreign marine species is also increasing. In order to solve these international environmental problems, the International Maritime Organization (IMO) The International Convention on the Control and Management of Ballast Water and Sediments of Ships has been completed, and a new ballast water treatment system has been installed on ships newly constructed from 2009.

Conventionally, as a method for treating ballast water, there has been a method in which ballast water is exchanged at sea or treated on the land, but there is a disadvantage in that it has a disadvantage of inefficiency and a method of installing a treatment facility for treating ballast water in a ship is widely used, In particular, ultraviolet sterilization methods using ultraviolet lamps are widely used as processing methods used in ballast water treatment facilities.

Referring to the patent documents listed below, conventionally, the ballast water treatment facility using the ultraviolet sterilization method sterilizes the ballast water introduced into the ship using an ultraviolet lamp, and stores sterilized ballast water in the ballast tank.

(Patent Literature)

Registered Patent Publication No. 10-079186 (2008. 01. 16. Announcement) "Method and Apparatus for Cleaning Ballast Water Sterilization"

However, since the ballast water flowing into the ship has different tubidity depending on the area where the ship is operated, the conventional ballast water treatment facility has a constant ultraviolet intensity and sterilization time, . That is, when the ballast water having high turbidity is introduced, the ultraviolet ray transmittance is lowered, and the ultraviolet ray irradiation amount is decreased, and the sterilizing effect is decreased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

An object of the present invention is to provide a ballast water treatment apparatus and method capable of improving the sterilizing effect of ballast water by keeping the irradiation amount of ultraviolet ray constantly in the sterilizing unit.

It is another object of the present invention to provide a ballast water sterilization apparatus and method which can maintain the irradiation amount of ultraviolet rays of the ballast water constantly by adjusting the irradiation time of the ballast water in consideration of the turbidity of the ballast water flowing in.

In addition, the present invention controls the flow rate control valve installed at the rear end of the sterilizing unit to control the time during which the ballast water stays in the sterilizing unit, that is, the ultraviolet ray irradiation time, so that a separate device There is no need to provide a sterilization apparatus for a ballast water and a method for sterilizing the same.

In addition, the present invention estimates the ultraviolet transmittance of the ballast water in consideration of a change in the ultraviolet intensity caused only by a change in the turbidity of the ballast water, except for a change in ultraviolet intensity due to other factors, And to provide a ballast water sterilization apparatus and method which can effectively cope with a change in turbidity.

In order to achieve the above object, the present invention is implemented by the following embodiments.

According to an embodiment of the present invention, a ballast water treatment apparatus in consideration of turbidity of ballast water according to the present invention includes a sterilizing unit for ultraviolet sterilizing an inflowed ballast water; And a residence time adjusting unit for adjusting the time of the ballast water staying in the sterilizing unit according to the ultraviolet ray transmittance varying by the turbidity of the ballast water introduced into the sterilizing unit to maintain the ultraviolet irradiation dose on the ballast water at a constant level .

According to another embodiment of the present invention, there is provided a ballast water treatment apparatus in consideration of turbidity of ballast water according to the present invention, the sterilizing unit comprising: a chamber having an inlet portion and an outlet portion through which ballast water can flow in and out; An ultraviolet lamp disposed in the chamber and irradiating ultraviolet rays to the ballast water flowing in the chamber; And an ultraviolet sensor for measuring an ultraviolet ray intensity in the chamber, wherein the residence time controller is configured to analyze data on the ultraviolet intensity measured by the ultraviolet sensor to calculate a turbidity estimation value of the ultraviolet ray transmittance of the ballast water flowing into the chamber And a module.

According to another embodiment of the present invention, a ballast water treatment apparatus considering the turbidity of the ballast water according to the present invention may further include a discharge pipe connected to the discharge portion of the chamber for moving sterilized ballast water discharged from the sterilizing unit The discharge pipe is provided with a flow rate control valve for controlling the flow rate of the ballast water flowing through the discharge pipe under the control of the residence time control unit to control the residence time of the ballast water in the chamber.

According to another embodiment of the present invention, in the ballast water treatment apparatus considering the turbidity of the ballast water according to the present invention, the residence time controller may further include a turbidity comparator comparing the estimated ultraviolet transmittance calculated by the turbidity calculation module with a reference ultraviolet transmittance A module; Wherein the turbidity comparison module determines the calculated ultraviolet transmittance to be lower than the reference ultraviolet transmittance by adjusting the flow rate control valve to reduce the open range of the discharge tube to increase the residence time in the chamber of the ballast water according to the reduced ultraviolet transmittance And a control module.

According to another embodiment of the present invention, in the ballast water treatment apparatus in consideration of the turbidity of the ballast water according to the present invention, the turbidity estimation module may calculate the turbidity of the ballast water by the ultraviolet sensor, The ultraviolet transmittance of the ballast water is calculated in consideration of a change in the ultraviolet intensity measured by the ultraviolet sensor only by a change in turbidity of the ballast water.

According to another embodiment of the present invention, there is provided a ballast water treatment apparatus which takes into consideration the turbidity of ballast water according to the present invention includes a water intake pump for supplying ballast water to the chamber, And further comprising a ballast tank.

According to another embodiment of the present invention, there is provided a method of treating ballast water in consideration of turbidity of ballast water according to the present invention, the method comprising: an ultraviolet ray measuring step of measuring ultraviolet ray intensity in a chamber and outputting the ultraviolet ray intensity to a controller; A data receiving step of receiving data on ultraviolet intensity output from the ultraviolet ray measuring step and receiving and outputting the data; An ultraviolet transmittance calculating step of analyzing data output from the data receiving step and calculating an estimated ultraviolet transmittance by analyzing the turbidity calculation module; Comparing the measured ultraviolet transmittance of the turbidity comparison module with the predetermined reference ultraviolet transmittance calculated in the calculating of the ultraviolet transmittance; The flow rate control module controls the flow rate control valve to reduce the opening range of the discharge pipe to reduce the opening degree of the discharge gas in the chamber of the ballast water according to the reduced ultraviolet ray transmittance, And a residence time adjusting step of increasing the residence time and keeping the ultraviolet irradiation amount constant.

According to another embodiment of the present invention, in the ballast water treatment method considering the turbidity of ballast water according to the present invention, in the ultraviolet ray transmittance calculation step, The ultraviolet transmittance of the ballast water is calculated in consideration of a change in the ultraviolet intensity measured by the ultraviolet sensor only by a change in turbidity of the water.

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

The present invention has an effect that the sterilizing effect of the ballast water can be improved by keeping the irradiation amount of the ultraviolet ray constantly in the sterilizing unit.

In addition, the present invention has an effect that the irradiation time of the ballast water can be adjusted in consideration of the turbidity of the inflowing ballast water, and the ultraviolet ray irradiation amount of the ballast water can be kept constant.

In addition, the present invention controls the flow rate control valve installed at the rear end of the sterilizing unit to control the time during which the ballast water stays in the sterilizing unit, that is, the ultraviolet ray irradiation time, so that a separate device There is no need and economical efficiency can be achieved.

In addition, the present invention estimates the ultraviolet transmittance of the ballast water in consideration of a change in the ultraviolet intensity caused only by a change in the turbidity of the ballast water, except for a change in ultraviolet intensity due to other factors, It is possible to effectively cope with the change in turbidity.

1 is a configuration diagram of a ballast water treatment apparatus according to an embodiment of the present invention;
Figure 2 is a partially cut away perspective view of the sterilization unit of Figure 1;
3 is a schematic perspective view for explaining the sterilizing unit of Fig.
Figure 4 is a block diagram of the controller of Figure 1;
5 is a reference diagram for explaining a method for controlling the residence time of ballast water in a ballast water treatment apparatus according to an embodiment of the present invention.
6 is a flowchart showing a method of treating ballast water using a ballast water treatment apparatus according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a ballast water treatment apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the terms used herein, It follows the definition used in the specification. Further, the detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a partially cut-away perspective view of the sterilizing unit of FIG. 1, FIG. 3 is a schematic perspective view for explaining the sterilizing unit of FIG. 1, and FIG. FIG. 4 is a block diagram of the controller of FIG. 1, FIG. 5 is a reference view for explaining a method of controlling the residence time of the ballast water in the ballast water treatment apparatus according to the embodiment of the present invention, FIG. 2 is a flowchart showing a method for treating ballast water using a ballast water treatment apparatus according to an embodiment of the present invention.

1 to 5, a ballast water treatment apparatus according to an embodiment of the present invention, which considers the turbidity of ballast water, will be described. The ballast water treatment apparatus includes an inflow pipe 1 into which ballast water flows, (3) for moving the ballast water discharged from the sterilizing unit (2) to the ballast tank (4), and a discharge pipe (3) for discharging ballast water discharged from the sterilizing unit (2) A ballast tank 4 for storing the ballast water supplied through the ballast water treatment apparatus 1, and a controller 5 for controlling the operation of the ballast water treatment apparatus. The turbidity of the ballast water flowing into the sterilization unit 2 The sterilizing efficiency of the ballast water can be improved by adjusting the time of the ballast water staying in the sterilizing unit 2 according to the changed ultraviolet ray transmittance and keeping the ultraviolet irradiation dose on the ballast water constant .

The inflow pipe (1) is configured to supply the ballast water introduced into the ship to the sterilizing unit (2), and the inflow pipe (1) is provided with a water intake pump (11). The water intake pump (11) is installed on the tip side of the inflow pipe (1) and operates under the control of the controller (5) to transport the ballast water through the inflow pipe (1).

The sterilization unit 2 includes a chamber 21 having an inlet 211 and an outlet 212 through which ballast water can flow in and out, An ultraviolet lamp 22 for irradiating ultraviolet rays to the ballast water flowing in the chamber 21; a sleeve tube 23 surrounding the ultraviolet lamp 22; A cleaning unit 24 for removing foreign substances, an ultraviolet sensor 25 for measuring the intensity of ultraviolet rays emitted from the ultraviolet lamp 22, and the like.

The chamber 21 may be formed as a cylindrical body having a space inside the sterilization unit 2, and may have an inlet 211 through which the ballast water flows and an outlet through which sterilized ballast water flows The inflow portion 211 and the discharge portion 212 may be formed on the cylindrical side surface of the chamber 21 because the inflow portion 211 and the discharge portion 212 are formed on the side surface of the cylindrical portion 21, It is to increase sterilization efficiency of water. The inlet 211 is connected to the inlet pipe 1 and the outlet 212 is connected to a discharge pipe 3 to be described later.

The ultraviolet lamp 22 is located in the chamber 21 and emits ultraviolet rays to the ballast water flowing in the chamber 21 under the control of the controller 5, A plurality of radially outwardly arranged radial slots 22 are arranged at regular intervals along the cylindrical interior of the chamber 21 in parallel with the axial direction of the chamber 21 to form a ballast flowing through the inlet 211 and the outlet 212 The water can pass vertically through the ultraviolet lamps 22.

The sleeve tube 23 surrounds the ultraviolet lamp 22 to prevent damage to the ultraviolet lamp 22. For example, a quartz tube having an excellent ultraviolet ray transmission efficiency can be used. If the foreign matter adheres to the surface of the sleeve tube 23, the intensity of the ultraviolet rays emitted is lowered, so that the surface of the sleeve tube 23 is cleaned by the washing unit 24 described later.

The cleaning unit 24 removes foreign matter adhering to the surface of the sleeve tube 23 under the control of the controller 5 and includes a wiper 241 attached to the outer circumferential surface of the sleeve tube 23, A driving shaft 242 connecting the wiper 241 and a driving motor 243 connected to the driving shaft 242 to operate the driving shaft 242.

The wiper 241 may be formed in an annular shape that surrounds the entire outer circumferential surface of the sleeve tube 23 and may have heat resistance. A plurality of wipers 241 may be provided in the case where a plurality of the sleeve tubes 23 are provided. In this case, each of the wipers 241 is connected to the driving shaft 242 Can be connected.

The driving shaft 242 is connected to the wiper 241 to move the wiper 241 so that the wiper 241 can remove foreign matter adhered to the outer circumferential surface of the sleeve 23, May be arranged in the center of the interior of the chamber 21 in parallel with the axial direction of the chamber 21, and the outer peripheral surface of the chamber 21 may be formed in a thread shape. One end of the driving shaft 242 is connected to the driving motor 243.

The driving motor 243 may be a motor commonly used as a part connected to one end of the driving shaft 242 to provide power for operating the driving shaft 242 and the wiper 241.

The ultraviolet ray sensor 25 measures the intensity of the ultraviolet ray inside the chamber 21 and data on the ultraviolet ray intensity measured by the ultraviolet ray sensor 25 is transmitted to the controller 5. The ultraviolet ray sensor 25 may be installed on the outer circumferential surface of the chamber 21 to penetrate the chamber 21. When the ultraviolet ray transmittance of the ballast water changes due to a change in the turbidity of the ballast water flowing into the chamber 21 or when the foreign matter adheres to the sleeve tube 23 due to continuous use of the ballast water treatment apparatus, 25) will vary. For example, since the ship runs in various areas with different environments, seawater, nose and fresh water can be used as the ballast water. Due to the different turbidity of seawater, nose and fresh water, the ballast water has different ultraviolet transmittance, The intensity of ultraviolet light measured inside is changed. If the water used as the ballast water is turbid, that is, the turbidity is high and the ultraviolet transmittance is low, the ultraviolet intensity measured by the ultraviolet sensor 25 is low. If the ballast water treatment apparatus is continuously used, even if there is no change in the turbidity of the ballast water, the ultraviolet ray intensity measured by the ultraviolet ray sensor 25 is lowered because the foreign matter is caught in the sleeve tube 23, The cleaning section 24 cleans the sleeve tube 23 under the control of the controller 5. [ The residence time of the ballast water in the chamber 21 is adjusted according to the intensity of ultraviolet rays measured by the ultraviolet sensor 25 which varies depending on the turbidity of the ballast water flowing into the chamber 21, , Which will be described in detail below.

The discharge pipe 3 is a pipe for transferring sterilized ballast water discharged from the sterilizing unit 2 and the ballast water transferred through the discharge pipe 3 is supplied to the ballast tank 4. A flow rate control valve 31 is disposed in the discharge pipe 3.

The flow rate control valve 31 is installed in the discharge pipe 3 and operates under the control of the controller 5 to control the flow rate of the ballast water flowing in the discharge pipe 3 to control the sterilizing unit 2 of the ballast water, In the chamber (21). The ballast water is continuously supplied to the chamber 21 by the water intake pump 11 during the operation of the ballast water treatment apparatus so that the flow rate control valve 31 located in the discharge pipe 3 is adjusted, The residence time of the ballast water in the chamber 21 can be adjusted. 5 (b), when the flow rate regulating valve 31 is adjusted to reduce the opening range of the discharge pipe 3 as shown in FIG. 5 (a) The ballast water retention time in the chamber 21 is increased. The flow rate control valve 31 is controlled by the controller 5 according to a value measured by the ultraviolet ray sensor 25, which will be described in detail later.

The ballast tank 4 is connected to the end of the discharge pipe 3 and stores sterilized ballast water passing through the sterilizing unit 2. The ballast tank 4 may have various shapes such as a cylindrical shape or a rectangular shape, , SUS304 or SPV300. ≪ / RTI > When the cargo is shipped to the ship, a drain pump (not shown) operates to discharge the ballast water stored in the ballast tank 4 to the outside of the ship.

The controller 5 is configured to control the overall operation of the ballast water treatment apparatus and includes a transmission and reception unit 51, a sterilizing operation unit 52, a cleaning operation unit 53, a residence time adjustment unit 54, And the like.

The transceiver 51 receives data on the ultraviolet intensity from the ultraviolet sensor 25 and controls the ultrasound intensity of the ultrasound intensity of the ultrasound intensity of the ultrasound intensity of the ultrasound intensity And transmits the operation signal.

When the operation signal of the ballast water treatment device is input by the user, the sterilizing operation part 52 fully opens the flow rate control valve 31 and operates the water intake pump 11 to supply the ballast water into the chamber 21 The ultraviolet lamp 22 is operated.

When the intensity of the ultraviolet light measured by the ultraviolet sensor 25 falls below a predetermined range during the continuous sterilization of the ballast water by the sterilizing operation unit 52, the cleaning operation unit 53 operates the cleaning unit 24 The driving motor 243 is actuated by the control instruction of the cleaning operation unit 53 to move the wiper 241 along the driving shaft 242 so that the wiper 241 moves on the surface of the sleeve tube 23 Thereby removing the attached foreign matter.

The residence time adjusting unit 54 adjusts the time of the ballast water staying in the sterilizing unit 2 according to the ultraviolet transmittance varying depending on the turbidity of the ballast water flowing into the sterilizing unit 2, A turbidity comparison module 542, a flow rate control module 543, and the like, and the like. The ultraviolet ray irradiation amount is determined by the product of the ultraviolet ray intensity and the irradiation time. The ultraviolet ray transmittance, that is, the ultraviolet ray intensity measured by the ultraviolet ray sensor 25 is determined by the turbidity of the ballast water flowing into the chamber 21 of the sterilizing unit 2 The residence time adjusting unit 54 adjusts the irradiation time, that is, the residence time of the ballast water in the chamber 21, so that the ultraviolet irradiation amount is constant.

The turbidity estimation module 541 is configured to analyze the measured data from the ultraviolet sensor 25 and calculate the ultraviolet transmittance of the ballast water (hereinafter, referred to as 'estimated ultraviolet transmittance'). If the turbidity of the inflowing ballast water is high, the ultraviolet ray transmittance is lowered, and the ultraviolet ray intensity measured by the ultraviolet ray sensor 25 is lowered. The turbidity estimation module 541 may calculate the turbidity of the ballast water only by a change in the turbidity of the ballast water except for a change in ultraviolet intensity measured by the ultraviolet sensor 25 due to other factors (for example, The ultraviolet ray transmittance of the ballast water is calculated in consideration of a change in ultraviolet intensity measured by the ultraviolet sensor 25. For example, when the intensity of ultraviolet light measured by the ultraviolet sensor 25 is lowered after a predetermined time has elapsed using the ballast water treatment apparatus, the ultraviolet ray transmittance of the ballast water is not immediately calculated, The ultraviolet ray transmittance of the ballast water can be estimated by analyzing ultraviolet ray intensity measured by the ultraviolet ray sensor 25 after cleaning the sleeve tube 23 to remove other factors affecting the ultraviolet ray intensity.

The turbidity comparison module 542 compares the estimated ultraviolet transmittance calculated by the turbidity estimation module 541 with a predetermined ultraviolet transmittance (hereinafter referred to as a reference ultraviolet transmittance).

When the turbidity comparison module 542 determines that the calculated UV transmittance is lower than the reference UV transmittance, the flow rate control module 543 adjusts the flow rate control valve 31 to reduce the opening range of the discharge tube 3, Thereby increasing the residence time of the ballast water in the chamber 21 in accordance with ultraviolet transmittance. For example, the value of the ultraviolet ray intensity (reference ultraviolet ray transmittance) measured by the ultraviolet sensor 25 is 100, except for other factors affecting the ultraviolet intensity except the turbidity of the ballast water, and the ballast water is irradiated with ultraviolet rays for 5 minutes The turbidity comparison module 542 determines that the calculated ultraviolet ray transmittance is lower than the reference ultraviolet ray transmittance when the calculated ultraviolet ray transmittance calculated by the turbidity estimation module 541 is 50, And the flow rate control module 543 adjusts the flow rate control valve 31 to reduce the opening range of the discharge pipe 3 to reduce the residence time of the ballast water in the chamber 21 to 10 minutes . That is, the retention time of the ballast water is increased according to the reduction of the ultraviolet ray transmittance, and the ultraviolet ray irradiation amount is made constant.

The controller (55) controls the overall operation of the controller (5).

1 to 6, a ballast water treatment method considering the turbidity of the ballast water includes a ballast water inflow step (S1), a ballast water treatment step The ultraviolet ray measuring step S2, the data transmission / reception step S3, the ultraviolet ray transmittance calculating step S4, the ultraviolet ray transmittance comparing step S5, the residence time adjusting step S6, and the end signal confirming step S7 .

In the ballast water inflow step S1, when an operation signal of the ballast water treatment apparatus is outputted, the sterilizing operation unit 52 completely opens the flow rate control valve 31 and operates the water intake pump 11 to operate the ballast water treatment apparatus And supplying the ballast water and operating the ultraviolet lamp 22.

The ultraviolet ray measuring step S2 is a step in which the ultraviolet ray sensor 25 located in the chamber 21 after the inflow of the ballast water S1 measures the intensity of the ultraviolet ray and transmits the ultraviolet ray to the controller 5.

The data receiving step S3 is a step in which the transmitting / receiving unit 51 receives and outputs data on the ultraviolet intensity outputted in the ultraviolet ray measuring step S2.

The ultraviolet ray transmittance calculation step S4 is a step in which the turbidity calculation module 541 analyzes the data output from the data reception step S3 to calculate an estimated ultraviolet ray transmittance, The ultraviolet ray transmittance of the ballast water is calculated in consideration of the data output in the data receiving step S3 only by the change of the turbidity of the ballast water except the change of ultraviolet intensity measured by the ultraviolet sensor 25 .

The ultraviolet ray transmittance comparison step S5 is a step for the turbidity comparison module 542 to compare the calculated ultraviolet ray transmittance calculated in the ultraviolet ray transmittance calculation step S4 with a predetermined reference ultraviolet ray transmittance.

In the residence time control step S6, when it is determined in the ultraviolet ray transmittance comparison step S5 that the calculated ultraviolet ray transmittance is lower than the reference ultraviolet ray transmittance, the flow rate control module 543 adjusts the flow rate control valve 31, (3) is reduced and the residence time of the ballast water in the chamber (21) is increased in accordance with the reduced ultraviolet ray transmittance to keep the ultraviolet radiation dose constant.

The termination signal checking step S7 is a step of determining whether a termination signal of the ballast water treatment apparatus is outputted when it is determined that the calculated ultraviolet ray transmittance is equal to or higher than the reference ultraviolet ray transmittance in the ultraviolet ray transmittance comparison step S5, The operation of the ballast water treatment device is stopped.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as belonging to the scope.

1: inlet pipe 2: sterilizing unit 3: outlet pipe
4: ballast tank 5: controller 11: intake pump
21: chamber 22: ultraviolet lamp 23: sleeve tube
24: cleaning part 25: ultraviolet sensor 31: flow rate adjusting valve
51: transceiver unit 52: sterilizing operation unit 53: cleaning operation unit
54: residence time adjusting section 55: control section 211: inflow section
212: discharge portion 241: wiper 242: drive shaft
243: drive motor 541: turbidity estimation module 542: turbidity comparison module
543: Flow rate control module

Claims (8)

An ultraviolet lamp that emits ultraviolet rays to the ballast water flowing in the chamber, and a sleeve tube that surrounds the ultraviolet lamp to prevent breakage of the ultraviolet lamp. The ultraviolet ray intensity in the chamber is measured A sterilizing unit including an ultraviolet sensor for generating ultraviolet rays;
A discharge pipe provided with a flow rate control valve for controlling the flow rate of the ballast water and controlling the residence time of the ballast water in the chamber;
A cleaning unit for removing foreign matter adhered to the surface of the sleeve tube;
And a residence time adjusting unit for adjusting the time of the ballast water staying in the sterilizing unit according to the ultraviolet ray transmittance varying by the turbidity of the ballast water introduced into the sterilizing unit to maintain the ultraviolet irradiation dose on the ballast water at a constant level, And a controller for controlling overall operation of the water treatment apparatus,
The retention time controller may include a turbidity estimation module for analyzing data on the ultraviolet intensity measured by the ultraviolet sensor and calculating an estimated ultraviolet transmittance of the ballast water flowing into the chamber, a turbidity calculation module for calculating a calculated ultraviolet transmittance calculated by the turbidity estimation module, Wherein the turbidity comparison module determines that the ultraviolet transmittance of the ballast water is lower than the reference ultraviolet transmittance by controlling the flow rate control valve to reduce the open range of the discharge tube, And a flow rate control module for increasing the residence time,
The turbidity estimating module operates the cleaning unit when the intensity of ultraviolet light measured by the ultraviolet sensor is lowered to clean the sleeve tube to remove factors affecting the ultraviolet intensity, Wherein the ultraviolet transmittance of the ballast water is calculated in consideration of the change in ultraviolet intensity measured in the ballast water turbidity.
delete delete delete delete 2. The ballast water treatment system according to claim 1,
Further comprising a water intake pump for supplying ballast water to the chamber, and a ballast tank connected to the discharge pipe for storing sterilized ballast water.
An ultraviolet ray measuring step of measuring ultraviolet ray intensity within the chamber and outputting the measured ultraviolet ray intensity to the controller;
A data receiving step of receiving data on ultraviolet intensity output from the ultraviolet ray measuring step and receiving and outputting the data;
An ultraviolet ray transmittance calculating step of analyzing data output from the data receiving step and calculating an estimated ultraviolet ray transmittance;
Comparing ultraviolet ray transmittance calculated in the calculating ultraviolet ray transmittance with predetermined ultraviolet ray transmittance;
If it is determined that the ultraviolet ray transmittance is lower than the reference ultraviolet ray transmittance in the ultraviolet ray transmittance comparison step, the flow rate control valve is adjusted to reduce the opening range of the discharge tube to increase the residence time in the chamber of the ballast water according to the reduced ultraviolet ray transmittance, And a residence time adjusting step
In the ultraviolet ray transmittance calculating step
Wherein the cleaning unit is operated when the intensity of ultraviolet light measured by the ultraviolet sensor is lowered to wash the sleeve tube which surrounds the ultraviolet lamp to prevent breakage of the ultraviolet lamp to remove a factor affecting ultraviolet light intensity, Wherein the ultraviolet transmittance of the ballast water is calculated in consideration of a change in the ultraviolet intensity measured by the ultraviolet ray sensor. delete

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