KR20230099139A - Automatic operation method of ship-mounted seawater desalination device - Google Patents

Abstract

The present invention includes the steps of checking where the current location of a ship is located among a berth, a movement route, a sea area near a fresh water supply site, and a fresh water supply site, using the ship's location information and route information determined according to the ship's operation schedule; Checking the amount of fresh water stored in the produced water tank of the seawater desalination device mounted on the ship; And according to the confirmed position of the ship and the amount of fresh water stored in the product water tank, the seawater desalination device is operated in a first mode of normal operation, a second mode of high load operation, a third mode of a stopped state, and fresh water to the fresh water supply. It relates to an automatic operation method of a ship-mounted seawater desalination device, including the step of selectively operating in any one of the supplying fourth modes.

Description

Automatic operation method of ship-mounted seawater desalination device}

The present invention relates to an automatic operation method of a ship-mounted seawater desalination device for supplying fresh water to islands and coastal areas by producing fresh water while navigating the sea.

Recently, due to climate change, regional and seasonal water shortages have become serious. For example, when a drought occurs, a serious water shortage occurs in a specific area, and in particular, a bigger problem may occur in island and coastal areas where water supply is weak.

In addition, water supply may be interrupted due to natural disasters and disasters such as earthquakes and floods, and there is a risk of emergency situations in which water supply is restricted due to man-made disasters such as terrorism.

As awareness of water security increases and the construction cost of existing onshore desalination plants increases, there is a movement to build a seawater mobile desalination system equipped with a seawater desalination device mounted on a ship instead of building a seawater desalination plant on land.

In order to operate such a ship-mounted seawater desalination device, manpower required to operate or manage the seawater desalination device mounted on the ship is required. It is a situation that has to board with. As these driving and management personnel are boarded, separate maritime training is required, and as the number of operating seawater desalination ships increases, the number of management personnel aboard is also required correspondingly. There is a problem that reduces the operational efficiency of the seawater desalination device.

Publication No. 10-2006-0123444 (2006.12.01)

The present invention is to solve the above problems, and an automatic operation method of a ship-mounted seawater desalination device capable of unmanned operation of the seawater desalination device without boarding the seawater desalination ship with operating and management personnel. making it a technical challenge.

The technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

According to an embodiment of the present invention, using the ship's location information and the route information determined according to the ship's operation schedule, the current ship's location is located among the anchorage, movement route, fresh water supply area, and fresh water supply step. and; Checking the amount of fresh water stored in the produced water tank of the seawater desalination device mounted on the ship; And according to the confirmed position of the ship and the amount of fresh water stored in the product water tank, the seawater desalination device is operated in a first mode of normal operation, a second mode of high load operation, a third mode of a stopped state, and fresh water to the fresh water supply. An automatic driving method of a ship-mounted seawater desalination device including the step of selectively operating in any one of the supplying fourth modes is disclosed.

In addition, when the location of the ship is an anchorage or a movement route, and the sum of the amount of fresh water stored in the product water tank and the amount of fresh water that can be produced to the sea area near the fresh water supply point is greater than or equal to the required amount of fresh water supply to the fresh water supply point, operating in the first mode , When the location of the vessel is an anchorage or a movement route, and the sum of the amount of fresh water stored in the product water tank and the amount of fresh water that can be produced to the sea area near the fresh water supply point is smaller than the required amount of fresh water supply to the fresh water supply point, operating in the second mode; , When the location of the ship is in a sea area near a fresh water supply point or when the amount of fresh water stored in the product water tank reaches a preset value, the ship operates in the third mode, and when the location of the ship is at a fresh water supply point, it operates in the fourth mode. can

In addition, the first to third modes include a concentrated water storage mode for storing concentrated water in the concentrated water tank to limit discharge of the concentrated water, and concentrated water for discharging the concentrated water from the concentrated water tank to the outside of the ship. Each may include an ejection mode.

In addition, the concentrated water tank of the seawater desalination device includes first and second concentrated water tanks connected to each other, and when the concentrated water storage mode is executed, the concentrated water is stored in the first concentrated water tank, but the first concentrated water is stored. When the water level of the water tank reaches a predetermined level, the second concentrated water tank is set to store the concentrated water, and when the concentrated water discharge mode is executed, the concentrated water is stored in the first concentrated water tank, and the first concentrated water is stored. When the water level in the water tank reaches a predetermined level, it may be set to be discharged to the outside of the vessel.

In addition, when the water level of the product water tank reaches a preset value during operation in the first mode or the second mode, switching to the third mode may be additionally performed.

In addition, the seawater desalination device. A UF membrane module for filtering seawater to remove particulate matter, and a reverse osmosis membrane module for filtering the seawater passing through the UF membrane module through a reverse osmosis membrane and supplying product water to the product water tank, During operation, it may be set to stop after performing a general cleaning mode in which the UF membrane module and the reverse osmosis membrane module are washed with water.

In addition, the general cleaning mode for the UF membrane module includes a mode for performing flushing using concentrated water in the concentrated water tank for a certain period of time and a mode for performing backwashing using filtered water that has passed through the UF membrane module. can include

In addition, the general cleaning mode for the reverse osmosis membrane module is a mode of flushing with concentrated water for a certain period of time and then stopping, a mode of flushing with product water for a certain period of time and then stopping, and a cycle after flushing with product water for a certain period of time. It may include a mode to perform.

In addition, the step of checking the operating pressure of the UF membrane module and the reverse osmosis membrane module during the operation of the first mode or the second mode, and the UF membrane module or the Operating a fifth mode of performing chemical cleaning of the reverse osmosis membrane module; may be additionally performed.

In addition, operating a sixth mode of injecting a preservation solution after chemical cleaning of the UF membrane module and the reverse osmosis membrane module according to a user's input or a preset condition; may be additionally performed.

According to an embodiment of the present invention, the fresh water production operation of the seawater desalination device is automatically turned on/off using the location information of the ship and the water level information of the produced water and the concentrated water tank of the seawater desalination device, so that the seawater desalination device mounted on the ship There is an effect of enabling unmanned and automatic operation of the desalination device.

In addition, by automatically controlling the production of fresh water at the anchorage or on the moving path of the ship, and by automatically controlling the production of fresh water to stop in the sea area near the fresh water supply such as islands and coastal areas, it is possible to increase the lifespan of the membrane and improve the efficiency of fresh water production. There are advantages that can be

In addition, by checking the current position of the ship and selectively performing a high-load operation in consideration of the fresh water production time to the fresh water supply site, it is possible to prevent a shortage of supply to the fresh water supply site in advance.

In addition, it is possible to minimize the effect of the discharge of concentrated water on the quality of the sea by controlling the discharge of concentrated water from the fresh water supply or anchorage.

1 is a block diagram of a ship-mounted seawater desalination device according to an embodiment of the present invention.
2 is a diagram schematically illustrating the interior of a ship equipped with the seawater desalination device of FIG. 1;
3 is a diagram illustrating an example of a movement path of a ship equipped with a seawater desalination device related to the present invention.
4 to 7 are flowcharts sequentially illustrating an automatic operation method of a ship-mounted seawater desalination device according to an embodiment of the present invention.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, it should be understood that this is not intended to limit the present invention to specific embodiments, and includes all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

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

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Hereinafter, an embodiment of an automatic driving system and method for a ship-mounted seawater desalination device according to the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components are the same Reference numbers are given and overlapping descriptions thereof will be omitted.

1 is a block configuration diagram of a ship-mounted seawater desalination device according to an embodiment of the present invention, and FIG. 2 is a diagram schematically showing the inside of a ship in which the seawater desalination device of FIG. 1 is mounted.

The ship-mounted seawater desalination device according to the present embodiment is mounted on the ship 1, and may be installed, for example, in a lower deck space. The seawater desalination device includes a water intake unit (10), a pretreatment filtration unit (30), a reverse osmosis membrane module (40), a product water tank (41), a concentrated water tank (42), and a fresh water supply unit (70). .

The water intake unit 10 is for taking in seawater around the ship 1 and may include a water intake pump and a raw water tank 21 . Seawater introduced into the ship by the operation of the water intake pump is stored in the raw water tank 21 .

The pre-filtration unit 30 is for pre-filtering seawater, and may include a feed pump, a screen filter 31, and an ultra-filtration membrane module 32 sequentially connected to the raw water tank 21. there is. Raw water in the raw water tank 21 is supplied to the screen filter 31 by the operation of the supply pump, and the screen filter removes large foreign substances such as algae from the seawater in the raw water tank. The seawater that has passed through the screen filter 31 is introduced into the UF membrane module 32 to remove particulate matter and then stored in the pre-treated filtrate tank 33.

The reverse osmosis membrane module 40 is configured to filter the seawater that has passed through the pretreatment filtration unit 30 through the reverse osmosis membrane to remove dissolved substances, that is, salt. The reverse osmosis membrane module 40 may be connected to a drain line of the pre-treated filtrate tank 33, and a transfer pump 39 for transferring filtrate may be installed in the drain line. A high-pressure pump 35 for providing pressure to seawater may be installed at the front end of the reverse osmosis separation unit 40, and a safety filter 36 may be installed at the front end of the high-pressure pump 35. An energy recovery unit (37) for recovering energy by using the pressure of the concentrated water is installed in the concentrated water drainage line of the reverse osmosis membrane module 40 . A booster pump 38 may be installed between the energy recovery unit 37 and the raw water supply line of the reverse osmosis membrane module 40 .

The product water tank 41 is connected to the product water drainage line of the reverse osmosis membrane module 40 and stores the product water produced by the filtration of the reverse osmosis membrane module 40 . A fresh water supply line for supplying fresh water to the land is connected to the product water tank 41 . As shown in FIG. 2 , the product water tank 41 may include a first product water tank 41a and a second product water tank 41b disposed separately from each other. The first product water tank 41a and the second product water tank 41b may be disposed in the left space and the right space based on the center of the ship, and the flow path between them is opened and closed by the electric valve 41c. can

The concentrated water tank 42 is connected to the concentrated water drainage line of the reverse osmosis membrane module 40 and functions to store concentrated water, which is a by-product generated in the seawater desalination process. A concentrated water discharge line for discharging concentrated water to the outside of the ship 1 may be connected to the concentrated water tank 42 . The concentrated water tank 42 may also include a first concentrated water tank 42a and a second concentrated water tank 42b disposed in the left and right spaces of the ship 1, and the flow path between them is a motorized valve 42c can be opened and closed by

The fresh water supply unit 50 functions to supply produced water (ie, fresh water) stored in the produced water tank 41 to a storage tank installed on land, and may include a fresh water supply pump and a hose connected thereto. A chlorine disinfection unit for chlorine disinfection may be additionally installed in the drain line of the product water tank 41, and the chlorinated fresh water is finally supplied to the land.

Each component of the seawater desalination device, specifically, components controllable by electrical signals, for example, various pumps, valves, and various other sensors and actuators, are controlled by the control unit 50. In particular, in relation to the present invention, the control unit 50 automatically controls the operation of the seawater desalination device, for example, fresh water production operation, concentrated water discharge operation, fresh water supply operation, washing and cleaning operation, and unmanned operation of the seawater desalination device. make this possible

3 is a diagram illustrating an example of a movement path of a ship equipped with a seawater desalination device related to the present invention.

According to the present invention, the route (route) along which the ship equipped with the seawater desalination device is set in advance according to the operation schedule. The ship 1 may operate on a schedule starting from the anchorage 110, supplying fresh water to preset fresh water supply points 113 and 117, and then returning to the anchorage 110, and FIG. 3 shows the ship 1 A case in which fresh water is supplied from the anchorage 110 to two fresh water supply points, that is, fresh water supply point A 113 and fresh water supply point B 117 is exemplified.

According to the present invention, the area where the ship 1 is located is the anchorage 110, the movement routes 111, 115, and 119, the fresh water supply points 113 and 117, and the fresh water supply points 113 and 117, 114, 116, 118).

The anchorage 110 includes both a land anchorage such as a port and a marine anchorage in which a ship can anchor at sea without entering land, and can be set within a radius of a preset distance from the coordinates of the anchorage 110.

The movement routes 111, 115, and 119 refer to routes in which the ship 1 departs from the anchorage 110 and moves toward the fresh water supply points 113 and 117 such as islands and coastal areas, and the fresh water supply points 113 and 117 ) refers to islands and coastal areas that are subject to freshwater supply. Further, the sea areas 112 , 114 , 116 , and 118 adjacent to the fresh water supply points 113 and 117 refer to areas located within a predetermined distance from the fresh water supply points 113 and 117 .

As shown in FIG. 3, when the ship 1 departs from the anchorage 110, supplies fresh water to the two fresh water supply points 113 and 117, and then returns to the anchorage 110, when a sailing schedule is established, the ship 1 (110) - Movement route (111) - Sea area adjacent to fresh water supply point A (112) - Fresh water supply point A (113) - Sea area adjacent to fresh water supply point A (114) - Movement route (115), sea area adjacent to fresh water supply point B ( 116) - fresh water supply site B (117) - sea area adjacent to fresh water supply site B (118) - moving route 117 - anchorage 110, and the route of the ship 1 is determined according to the operation schedule can The route of the ship 1 is determined in advance based on the ship's operation schedule, marine map data, and geographical data of anchorage and fresh water supply points, which are stored in the information storage means provided in the ship. As will be described below, the control unit 50 automatically controls the seawater desalination device by utilizing vessel position and speed information, route information, and the like.

4 to 7 are flowcharts sequentially illustrating an automatic operation method of a ship-mounted seawater desalination device according to an embodiment of the present invention.

The operation mode of the ship-mounted seawater desalination device according to the present embodiment includes a plurality of unit operation modes, and the control unit 50 controls the operation position of the ship 1 on the route and the amount of fresh water stored in the product water tank 41. Accordingly, the seawater desalination device is controlled to operate in one mode among a plurality of unit operation modes.

The unit operation mode of the seawater desalination device may include a first mode to a sixth mode as shown in Table 1 below.

mode number unit operation mode Ship
movement screen filter UF Membrane Module reverse osmosis membrane
module Goat
Disinfection concentrated water tank One a normal operation stop ON ON ON ON concentrated water storage b normal operation movement ON ON ON ON concentrated water discharge 2 a high load operation stop ON ON ON ON concentrated water storage b high load operation movement ON ON ON ON concentrated water discharge 3 a standstill Go/Stop OFF common
sejung common
sejung OFF concentrated water storage b standstill movement OFF common
sejung common
sejung OFF concentrated water discharge 4 a water supply stop OFF OFF OFF OFF - b stop water supply movement OFF OFF OFF OFF - 5 a UF chemical cleaning stop OFF chemistry
sejung common
sejung OFF concentrated water storage b RO chemical cleaning stop OFF common
sejung chemistry
sejung OFF concentrated water storage 6 Long-term maintenance of vessels and desalination units Go/Stop OFF preservative injection preservative injection OFF concentrated water discharge

As shown in Table 1, the first mode is a normal operation mode, and each detailed component of the seawater desalination device, that is, the screen filter 31, the UF membrane module 32, the reverse osmosis membrane module 40, and the chlorine disinfection unit are all It works to produce fresh water.

The second mode is a mode in which the load is increased from the basic production load of the first mode, the normal operation mode, and the load is up to 1.5 times the basic production load to increase the freshwater production speed when the freshwater production time to the freshwater supply point is insufficient. works to increase

The third mode is a mode in which the operation of the seawater desalination device is stopped, and the operations of the screen filter 31, the UF membrane module 32, the reverse osmosis membrane module 40, and the chlorine disinfection unit are stopped. When operating in the third mode, it is also possible to perform a general cleaning mode in which the UF membrane module 32 and the reverse osmosis membrane module 40 are washed with water and then stopped.

The general cleaning mode of the UF membrane module 32 includes a mode in which flushing is performed using the concentrated water in the concentrated water tank 42 for a certain period of time and a mode in which backwashing is performed using the filtered water in the pretreatment filtrate tank 33. It can be included, and it can be set to selectively perform one of these two modes or to perform the two modes step by step.

The general cleaning mode of the reverse osmosis membrane module 40 is a mode in which flushing is performed with concentrated water in the concentrated water tank 42 for a certain period of time and then stopped, and a mode in which flushing is performed with the product water in the product water tank 41 for a certain period of time and then stopped and a mode of circulating water to the reverse osmosis membrane module 40 after flushing with the produced water of the produced water tank 41 for a certain period of time. These three modes can be selected and performed according to the degree of membrane contamination measured through a sensing means (eg, filtered water TDS, operating pressure, etc.), or can be set to perform two or more modes step by step.

The first mode, the second mode, and the third mode are concentrated water storage modes (1-a, 2-a, 3-a) for storing concentrated water in the concentrated water tank 42, respectively, and the concentrated water tank 42 Concentrated water discharge modes (1-b, 2-b, 3-b) for discharging concentrated water may be included.

During operation in the third mode, a certain amount of concentrated water to be used for general washing may be stored in the concentrated water tank 42 even in the concentrated water discharging mode of the first and second modes. To this end, in the concentrated water discharge modes 1-b and 2-b of the first and second modes, the concentrated water is stored in the first concentrated water tank 42a, but the water level in the first concentrated water tank 42a is When the set water level is reached, it is set to be discharged to the outside of the vessel (1).

Concentrated water storage modes 1-a and 1-b of the first and second modes operate in a stationary state of the ship 1, and the concentrated water is prevented from being discharged into the sea area of the anchorage 110 in the corresponding mode. In the concentrated water storage modes 1-a and 2-a of the first and second modes, the concentrated water is first stored in the first concentrated water tank 42a, but the water level in the first concentrated water tank 42a is preset. When the water level is reached, the concentrated water in the first concentrated water tank 42a is sent to the second concentrated water tank 42b to store the concentrated water.

When operating the general cleaning mode of the UF membrane module 32 and the reverse osmosis membrane module 40 during operation in the third mode, the concentrated water stored in the first concentrated water tank 42a is used to clean the UF membrane module 32 and the reverse osmosis membrane. The module 40 may be flushed, and concentrated water used for cleaning may be stored in the second concentrated water tank 42b.

The fourth mode is a mode for supplying fresh water when the ship arrives at the fresh water supply point 113 and stops moving, and may include a water supply mode (4-a) and a water supply stop mode (4-b). In the fourth mode, the operation of the seawater desalination device is stopped and the fresh water supply unit 50 is turned on/off to operate the water supply mode 4-a and the water supply stop mode 4-b.

The fifth mode is a mode for performing chemical cleaning of the UF membrane module 32 or the reverse osmosis membrane module 40, and is operated when the vessel 1 is stopped. The fifth mode may include a UF chemical cleaning mode 5-a for chemically cleaning the UF membrane module 32 and an RO chemical cleaning mode 5-b for chemically cleaning the reverse osmosis membrane module 40. In the UF chemical cleaning mode (5-a), chemical cleaning may be performed on the UF membrane module 32 and general cleaning may be performed on the reverse osmosis membrane module 40. In the RO chemical cleaning mode (5-b), general cleaning may be performed on the UF membrane module 32, and chemical cleaning may be performed on the reverse osmosis membrane module 40. When using the concentrated water in the concentrated water tank 42 during general cleaning After general cleaning of the concentrated water stored in the first concentrated water tank 42a as described above, the concentrated water used for cleaning is used in the second concentrated water tank ( 42b).

Chemical cleaning of the UF membrane module 32 or reverse osmosis membrane module 40 is performed by injecting chemicals into the cleaning liquid storage tank and then sending them to the UF membrane module 32 or reverse osmosis membrane module 40. The waste liquid used for chemical cleaning is It is stored back in the cleaning liquid storage tank. An alarm may be generated when the water level of the washing liquid storage tank exceeds a predetermined value during ship operation, and in this case, it may be set to automatically switch to the third mode. The waste liquid in the cleaning liquid storage tank may be treated after moving to the anchorage 110 .

The sixth mode is a long-term maintenance mode for the ship and the desalination device, which is executed when the ship or the desalination device is not operated for a predetermined period of time or more. In the sixth mode, the operation of the screen filter 31 and the chlorine disinfection unit is stopped, and a preservation solution is injected into the UF membrane module 32 and the reverse osmosis membrane module 40. Chemical cleaning may be performed on the UF membrane module 32 and the reverse osmosis membrane module 40 before injection of the preservation solution, and all concentrated water in the concentrated water tank 42 is discharged to make the concentrated water tank 42 empty. .

4 to 7 are flowcharts sequentially illustrating an automatic operation method of a ship-mounted seawater desalination device according to an embodiment of the present invention, and hereinafter, with reference to the automatic operation method of the ship-mounted seawater desalination device according to the present embodiment. explain in detail.

In this embodiment, as illustrated in FIG. 3, the case where the ship 1 departs from the anchorage 110, supplies fresh water to two fresh water supply points 113 and 117, and then follows a path returning to the anchorage 110 explain the basis. However, it will be obvious to those skilled in the art that the automatic operation method of the seawater desalination device can be modified and implemented correspondingly according to the operation schedule of the ship 1.

Referring to the automatic operation method of the ship-mounted seawater desalination device according to the present embodiment, the current location of the ship is determined by using the location information of the ship 1 and preset route information. 115 and 119), the sea area near the fresh water supply site (112, 114, 116, 118), and the fresh water supply site (113, 117) are checked (S10). The control unit 60 of the seawater desalination device may be connected to a control unit of the ship to receive GPS information, speed information, route information, etc. of the ship 1 in real time.

Before checking the position of the vessel, it is possible to check whether the seawater desalination device and the vessel are normally operated (S5). The sixth mode is operated. When the normal operation of the ship and the desalination device is confirmed, the location of the ship 1 is checked (S10).

Next, the amount of fresh water stored in the product tank 41 of the seawater desalination device is checked (S12), and the unit operation mode is selectively operated according to the confirmed location of the vessel 1 and the amount of stored fresh water in the product tank 41. let it

Specifically, the location of the ship 1 is the anchorage 110 or the movement route 111, 115, 119, the amount of fresh water stored in the product water tank 41 and the amount of fresh water that can be produced up to the sea area 112, 116 near the fresh water supply point When the sum is equal to or greater than the amount of fresh water supplied to the fresh water supply points 113 and 117, operation is performed in the first mode. In addition, the location of the ship 1 is the anchorage 110 or the moving route 111, 115, 119), the sum of the amount of fresh water stored in the product water tank 41 and the amount of fresh water that can be produced up to the sea area 112, 116 near the fresh water supply point When the amount of fresh water supplied to the fresh water supply points 113 and 117 is smaller than the second mode, the operation is performed. In addition, when the location of the ship 1 is in the sea area 112, 114, 116, 118 near the fresh water supply point or when the amount of fresh water stored in the product water tank 41 reaches a preset value, the ship 1 operates in the third mode. When the location is the fresh water supply points 113 and 117, it operates in the fourth mode.

In addition, the operation pressure of the UF membrane module 32 and the reverse osmosis membrane module 40 is checked during operation in the first mode or the second mode, and according to the result of the confirmation of the operation pressure, the chemical cleaning mode in the stationary state of the ship 1 Drive in the 5th mode. When the operating pressure of the UF membrane module 32 exceeds the threshold value, it operates in the 5-a mode, and when the operating pressure of the reverse osmosis membrane module 40 exceeds the operating pressure, it operates in the 5-b mode.

In addition, when the user's input or a preset condition, for example, the ship 1 or the seawater desalination device is not operated for a set period or longer, the sixth mode, which is a long-term maintenance mode, is operated.

As shown in FIG. 4, when it is confirmed that the location of the ship 1 is the anchorage 110 as a result of checking the location of the ship 1 (S11), the storage fresh water amount (water level) of the product water tank 41 is checked (S12), and production When the water level in the water tank 41 reaches a predetermined value (eg, full water level), the third mode is operated because fresh water production is not required. In this case, since the location of the vessel 1 is the anchorage 110, it operates in the 3-a mode to limit discharge of concentrated water (S17).

When the water level of the product water tank 41 is less than the preset value, the sum of the amount of fresh water stored in the product water tank 41 and the amount of fresh water that can be produced up to the sea area 112 adjacent to the fresh water supply point A supplies fresh water to the fresh water supply point A 113 It is checked whether it is more than the required amount (S13).

As a result of the check, if the sum of the amount of fresh water stored in the production water tank 41 and the amount of fresh water that can be produced to the nearby sea area 112 of the fresh water supply point A is greater than the required amount of fresh water supply to the fresh water supply point A 113, the first mode, which is a normal operation mode, is performed. It is operated (S15), otherwise, the second mode, which is a high load operation mode, is operated (S16). When the location of the vessel 1 is the anchorage 110, it operates in the 1-a mode and the 2-a mode to limit discharge of concentrated water (S15 and S16).

The ship 1 departs from the anchorage 110 and moves toward the fresh water supply point A 113, and at this time, the control unit 60 continuously or periodically checks whether the location of the ship corresponds to the movement route 111 ( S20).

When it is confirmed that the location of the ship 1 corresponds to the movement route 111 (S21), fresh water is supplied to the water level of the product water tank 41 and the nearby sea area 112 of the fresh water supply point A 113 as shown in FIG. Whether or not production of the required amount is sequentially checked (S22, S23).

When the water level of the product water tank 41 reaches a preset value (eg, full water level), the third mode is operated, and in this case, the discharge of concentrated water is restricted because the location of the vessel 1 is the movement path 111. It operates in the 3-b mode that does not operate (S24).

When the water level of the product water tank 41 is less than the preset value, the sum of the amount of fresh water stored in the product water tank 41 and the amount of fresh water that can be produced up to the sea area 112 adjacent to the fresh water supply point A supplies fresh water to the fresh water supply point A 113. If it is more than the required amount, the first mode, which is a normal operation mode, is operated (S25). When the sum of the amount of fresh water stored in the product water tank 41 and the amount of fresh water that can be produced up to the sea area 112 adjacent to the fresh water supply point A is smaller than the fresh water supply requirement for the fresh water supply point A 113, the second mode, which is a high load operation mode, is operated. (S26). In this case, since the location of the ship 1 is the movement path 111, the vessel 1 operates in the 1-b mode and the 2-b mode, respectively, in which discharge of concentrated water is not restricted (S25 and S26).

Next, as the vessel 1 continues to move along the moving path 111, it is checked whether the location of the vessel 1 is the sea area 112 adjacent to the fresh water supply point A (S27), and the vessel 1 continues to operate. When it is confirmed that the location of the vessel 1 is the sea area 112 adjacent to the fresh water supply point A, the next step is performed (S28).

As shown in FIG. 6, when it is confirmed that the location of the vessel 1 is the sea area 112 adjacent to the fresh water supply point A, the seawater desalination device is switched to the third mode, which is a stop mode (S29). The sea area 112 near the freshwater supply point is generally a land area, and the water quality is poor compared to the movement route 111. When seawater desalination is performed using seawater of poor water quality, the UF membrane module 32 or the reverse osmosis membrane Since the lifetime of the membrane of the module 40 may be shortened, the operation of the desalination device is stopped at the corresponding position. In addition, since the discharge of concentrated water may adversely affect the water quality of the corresponding sea area, the operation is performed in the 3-a mode to limit the discharge of concentrated water.

Next, as the vessel 1 continues to move in the sea area 112 adjacent to the fresh water supply area A, it is checked whether the location of the vessel 1 corresponds to the fresh water supply area A 113 (S30).

When it is confirmed that the location of the vessel 1 corresponds to the fresh water supply point A 113 (S31), the mode is switched to the 4-a mode, which is a water supply mode (S32), and when the fresh water supply is completed as much as the required amount of fresh water supply, water supply It switches to the 4-b mode, which is a stop mode (S33).

After the supply of fresh water is completed, as the ship 1 departs and moves toward the next destination, it is checked whether the location of the ship 1 is the sea area 114 adjacent to the fresh water supply point A (S35), and the location of the ship 1 When it is confirmed that the fresh water supply point A corresponds to the nearby sea area 114, the third mode is switched (S36). In this case, it operates in the 3-a mode that limits the discharge of concentrated water.

As the vessel 1 continues to move on the nearby sea area 114, it is checked whether the vessel has left the nearby sea area 116, that is, has entered the movement path 115 (S37).

If it is confirmed that the ship 1 is located on the movement path 115, the process shown in FIGS. 5 and 6 is performed again. That is, as the ship 1 sequentially moves through the movement path 116, the sea area 116 adjacent to the fresh water supply point B, the fresh water supply area B 117, and the sea area 118 adjacent to the fresh water supply point B, FIGS. 5 and 6 Automatic driving is performed according to the illustrated process.

In this embodiment, it is based on an operation schedule for supplying fresh water to two fresh water supply points, but when more fresh water supply points are added, the processes shown in FIGS. 5 and 6 are correspondingly added.

After the fresh water supply to the fresh water supply point B 117 is confirmed that the ship 1 is located on the movement route 19 outside the nearby sea area 118, the water level of the product water tank 41 is checked (S39 ), and as a result of the confirmation, if the water level of the product water tank 41 is higher than the preset value, the third mode is operated (S40), and if the water level of the product water tank 41 is less than the preset value, the first mode, which is normal operation, is operated (S40). S41). In this case, since the position of the vessel 1 corresponds to the movement path 119 and there is no need to limit the discharge of concentrated water, the ship operates in the 1-b mode or the 3-b mode.

As the ship 1 continues to run toward the anchorage 110 on the moving path 119, it is checked whether the location of the ship 1 corresponds to the anchorage 110, and according to the result, the The process after the anchorage location confirmation step (S11) is performed again. After the ship 1 arrives at the anchorage 110, when it is determined that the chemical cleaning of the UF membrane module 32 or the reverse osmosis membrane module 40 is necessary in the process of moving the ship, the fifth mode is additionally performed, and then the subsequent processes can be performed.

Although the above has been described with reference to specific embodiments of the present invention, those skilled in the art can make various modifications to the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. It will be understood that it can be modified and changed accordingly.

10: water intake unit 30: pretreatment filtration unit
31: screen filter 32: UF membrane module
40: reverse osmosis membrane module 41: product water tank
42: concentrated water tank 50: fresh water supply unit
60: control unit 1: vessel
110: anchorage 111, 115, 119: movement route
112, 114, 116, 118: sea area near fresh water supply
113: 117: fresh water supply

Claims (10)

Checking whether the current location of the ship is located among a berth, a movement route, a sea area near a fresh water supply site, and a fresh water supply site by using the ship's location information and route information determined according to the ship's operation schedule;
Checking the amount of fresh water stored in the produced water tank of the seawater desalination device mounted on the ship; and
According to the confirmed location of the ship and the amount of fresh water stored in the product water tank, the operating modes of the seawater desalination device are a first mode of normal operation, a second mode of high load operation, a third mode of stationary state, and a fresh water supply site. A method for automatically operating a ship-mounted seawater desalination device, comprising: selectively operating in one of the fourth modes for supplying fresh water.
According to claim 1,
When the location of the vessel is an anchorage or a movement route, and the sum of the amount of fresh water stored in the product water tank and the amount of fresh water that can be produced to the sea area near the fresh water supply point is greater than or equal to the required amount of fresh water supply to the fresh water supply point, operating in the first mode
When the location of the ship is an anchorage or a movement route, and the sum of the amount of fresh water stored in the product water tank and the amount of fresh water that can be produced to the sea area near the fresh water supply point is smaller than the required amount of fresh water supply to the fresh water supply point, operating in the second mode,
Operating in the third mode when the location of the ship is in a sea area near a fresh water supply or when the amount of fresh water stored in the produced water tank reaches a preset value,
An automatic driving method of a ship-mounted seawater desalination device, characterized in that operating in the fourth mode when the location of the ship is a fresh water supply.
According to claim 2,
The first to third modes include a concentrated water storage mode for storing the concentrated water in the concentrated water tank to limit discharge of the concentrated water, and a concentrated water discharge mode for discharging the concentrated water from the concentrated water tank to the outside of the ship. Characterized in that each comprising a, automatic operation method of the ship-mounted seawater desalination device.
According to claim 3,
The concentrated water tank of the seawater desalination device includes first and second concentrated water tanks connected to each other,
When the concentrated water storage mode is executed, the concentrated water is stored in the first concentrated water tank, and the concentrated water is stored in the second concentrated water tank when the water level in the first concentrated water tank reaches a predetermined level,
Characterized in that, when the concentrated water discharge mode is executed, the concentrated water is stored in the first concentrated water tank, and is set to be discharged to the outside of the ship when the water level in the first concentrated water tank reaches a predetermined water level. Automatic operation method of ship-mounted seawater desalination system.
According to claim 1,
Switching to the third mode when the water level of the product water tank reaches a preset value during operation in the first mode or the second mode; characterized in that it further comprises, automatic how to drive.
According to claim 1,
The seawater desalination device. A UF membrane module for filtering seawater to remove particulate matter, and a reverse osmosis membrane module for supplying product water to the product water tank by filtering the seawater that has passed through the UF membrane module through a reverse osmosis membrane,
When operating in the third mode, the automatic operation method of the ship-mounted seawater desalination device, characterized in that set to stop after performing a general cleaning mode of washing the UF membrane module and the reverse osmosis membrane module with water.
The method of claim 6, wherein the general cleaning mode for the UF membrane module,
Characterized in that it comprises a mode of performing flushing using the concentrated water of the concentrated water tank for a certain period of time and a mode of performing backwashing using the filtered water that has passed through the UF membrane module, a ship-mounted seawater desalination device automatic driving method.
The method of claim 6, wherein the general cleaning mode for the reverse osmosis membrane module,
A vessel characterized in that it includes a mode of flushing with concentrated water for a certain period of time and then stopping, a mode of flushing with product water for a certain period of time and then stopping, and a mode of performing circulation after flushing with product water for a certain period of time. Automatic operation method of onboard seawater desalination system.
According to claim 6,
Checking operating pressures of the UF membrane module and the reverse osmosis membrane module during operation in the first mode or the second mode; and
Operating a fifth mode of performing chemical cleaning of the UF membrane module or the reverse osmosis membrane module when the ship is stopped according to the confirmation result of the operating pressure; characterized in that it further comprises, ship-mounted seawater desalination How to automatically drive the device.
According to claim 6,
According to a user's input or a preset condition, operating a sixth mode of injecting a preservation solution after chemical cleaning of the UF membrane module and the reverse osmosis membrane module; Characterized in that it further comprises, a ship-mounted seawater desalination device automatic driving method.

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