KR102183466B1 - Apparatus of injecting heated water for reducing ice resistance in arctic vessel - Google Patents

Abstract

The present invention, a seawater suction unit formed below the waterline of the polar ship to suck seawater; A heating unit for heating a pipe through which seawater introduced by the seawater suction unit flows; A storage tank for storing hot water passing through the heating unit; And a nozzle unit that melts and crushes ice by receiving hot water from the storage tank and spraying hot water to the stern hull or the rear of the stern; including, by high-pressure spraying of hot water, ice attached to the hull surface or approaching the hull Disclosed is a hot water spraying device for reducing ice resistance of polar-operated ships, which can be removed so that ice can be crushed with less propulsion, thereby improving operational efficiency.

Description

Hot water spraying device for reducing ice resistance in polar ships {APPARATUS OF INJECTING HEATED WATER FOR REDUCING ICE RESISTANCE IN ARCTIC VESSEL}

The present invention relates to a technology related to ice-breaking of a polar ship, and more particularly, by high-pressure spraying of hot water, the ice adhering to the hull surface or approaching the hull is removed so that ice can be crushed with less propulsive force. The present invention relates to a hot water spraying device for reducing ice resistance of polar ships, which can improve operational efficiency.

Polar operating ships, such as large cargo ships operating through the poles, or ice breakers serving polar exploration purposes or towing ships in distress at the poles, operate in front and rear or left and right in various ice conditions in harsh polar environments ( Operation) must be possible to operate. If the hull cannot overcome ice resistance in thick ice conditions, a serious situation may occur because it is trapped in an ice plate and cannot be operated.

On the other hand, minimization of ice resistance of polar ships is a top priority consideration in the pre-development stage, and ice must be crushed with as little propulsive force as possible, and crushed ice fragments must be attached to the hull so that they are not fixed. Minimizing the contact angle of the ship makes it difficult to arrange various equipment essential for ship operation, and increases the hull tonnage due to the increase in the amount of casing and affects the increase in manufacturing cost.

In this regard, as a prior art for reducing ice resistance, Korean Laid-Open Patent Publication No. 2018-0076941 (a steam injection and icebreaking apparatus and method of an icebreaking LNG ship) is disclosed. , As shown in FIG. 1, the boil-off gas generated from the LNG fuel tank or LNG cargo hold inside the ship is used as a heat source, and fresh water is supplied and heated to generate steam, and a steam boiler installed on the bow of the ship ( 10), the main steam pipe 20 connected to the steam discharge port of the steam boiler 10, a plurality of auxiliary steam pipes 30 branching from the main steam pipe 20, and the auxiliary steam pipes 30, respectively The steam spray nozzle 40 is provided at the end of the head and is arranged in a plurality of rows and columns on the outer surface of the bow part, and is disposed between the auxiliary steam pipe 30 and the steam spray nozzle 40, and the steam spray nozzle 40 It consists of a variable unit 50 to change the injection angle of.

However, since the steam spray nozzle is disposed above the water line, there is still a problem that ice fragments attached below the ship's water line cannot be removed, and there is a need for technology improvement that can receive a heat source for steam generation from a simpler structure without additional equipment. do.

Korean Patent Application Publication No. 2018-0076941 (Steam injection and icebreaking apparatus and method for icebreaking LNG ships, 2018.07.06) Korean Patent Publication No. 1824164 (Anti-icing louver system using steam, 2018.02.01) Korean Patent Laid-Open Publication No. 2015-0063215 (An icebreaking assistance device for ships operating in an ice sea area, 2015.06.09) Korean Patent Publication No. 1369480 (Marine work vessel for polar regions, 2014.03.03) Korean Patent Publication No. 1818525 (Ship's exhaust gas recovery system and method, 2018.01.15)

The technical problem to be achieved by the idea of the present invention is to remove ice adhering to the hull surface or approaching the hull by high-pressure spraying of hot water under the water line, so that ice can be crushed with less propulsive force, thereby improving operational efficiency. It is to provide a hot water spraying device for reducing ice resistance of ships operating in polar regions, which can be improved.

In order to achieve the above object, the present invention is formed under the water line of the polar ship, seawater suction unit for inhaling seawater; A heating unit for heating a pipe through which seawater introduced by the seawater suction unit flows; A storage tank for storing hot water passing through the heating unit; And a nozzle unit that melts and crushes ice by receiving hot water from the storage tank and spraying hot water to the stern hull or the rear of the stern. It provides a hot water spraying device for reducing ice resistance of a polar ship.

Here, the nozzle unit is arranged to be rotatable under the waterline, the nozzle unit rotates in a direction perpendicular to the stern hull and sprays hot water to remove ice adhering to the stern hull surface, and the stern It may be configured to drive in a rotation mode in which the nozzle unit rotates in a rear direction of the hull and hot water is injected to remove ice approaching the stern hull.

In addition, the nozzle unit, a nozzle for spraying hot water at high pressure; A rotation drive module for rotating the nozzle according to the hull mode or rotation mode; A flexible connection pipe connecting the nozzle and the pipe; A first temperature sensor sensing the temperature of the nozzle and the flexible connection pipe; An observation camera photographing an area adjacent to the stern hull; A heating coil surrounding the nozzle and the flexible connector; It may include; a control module for preventing freezing by heating the heating coil according to the temperature measured by the first temperature sensor or the observation camera or the stern hull condition.

In addition, the nozzle part may be formed below the water line.

In addition, the pipe is configured to pass through an exhaust gas pipe discharged from the main engine or a cooling water pipe through which cooling water returns, and the heating unit heats the pipe to a predetermined temperature with waste heat recovered from the exhaust gas pipe or the cooling water pipe. can do.

In addition, the pipe is configured to surround the exhaust gas pipe discharged from the main engine or the cooling water pipe to which the cooling water is returned in a solenoid shape, and the heating unit is configured to set the pipe with waste heat recovered from the exhaust gas pipe or the cooling water pipe. Can be heated to temperature.

In addition, the storage tank, a water level sensor that measures the level of hot water flowing in from the pipe, a valve that regulates hot water flowing from the pipe according to the water level measured by the water level sensor, and senses the temperature of the hot water And a heating module that heats the storage tank according to the temperature measured by the second temperature sensor.

According to the present invention, by high-pressure injection of hot water, ice adhering to the hull surface below the waterline or approaching the hull is removed, so that ice can be crushed with less propulsion, thereby improving operational efficiency. .

In addition, it is possible to improve the ice resistance of the ship by crushing ice without further deformation of the ship, thereby reducing design time and production cost.

Furthermore, there is an effect of improving energy efficiency according to hot water generation by heating seawater by recovering waste heat from an existing main engine or waste heat recovery device without additional equipment.

1 shows a steam injection and icebreaking apparatus for an icebreaking LNG ship according to the prior art.
2 is a schematic diagram illustrating a configuration of a hot water spraying device for reducing ice resistance of a polar ship according to an embodiment of the present invention.
FIG. 3 is an illustration of a polar sailing ship to which a hot water spray device for reducing ice resistance of the polar sailing ship of FIG. 2 is applied.
FIG. 4 is a diagram illustrating a spray mode of a nozzle part of a hot water spray device for reducing ice resistance of the polar ship of FIG. 3.
5 is a diagram illustrating a piping configuration of a hot water spray device for reducing ice resistance of the polar ship of FIG. 3.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms, and is not limited to the embodiments described herein.

FIG. 2 is a schematic diagram illustrating a configuration diagram of a hot water spraying device for reducing ice resistance of a polar sailing ship according to an embodiment of the present invention, and FIG. 3 is a hot water spraying device for reducing ice resistance of the polar sailing ship of FIG. Figure 4 illustrates the spraying modes of the nozzle unit of the hot water spraying device for reducing the ice resistance of the polar operating ship of Figure 3, and Figure 5 is an illustration of the polar operating ship of Figure 3 Each of the piping configurations of the hot water injection device for reducing resistance is illustrated.

2 to 5, a hot water spraying device for reducing ice resistance of a polar ship according to an embodiment of the present invention includes, as a whole, a seawater suction unit 110 for inhaling seawater, and a heating unit for heating seawater. It is composed of 120, a storage tank 130 for storing hot water, and a nozzle unit 140 for spraying hot water, and is attached to the stern hull below the water line by spraying hot water at high pressure by the nozzle unit 140 or The aim is to reduce the ice resistance of polar ships by removing ice approaching the rear.

First, the sea chest 110 is formed under the draft line D of the polar vessel to filter and suck the sea water.

Next, the heating unit 120 heats the pipe 121 through which the seawater introduced by the seawater suction unit 110 flows to a predetermined temperature.

For example, as shown in Figure 5 (a), the pipe 121 is the exhaust gas pipe 122 discharged from the main engine 11 or the cooling water passing through the main engine 11 is returned. It is configured to pass through a cooling water pipe (not shown), and heats the seawater flowing through the pipe 121 to a predetermined temperature by heat exchange in the exhaust gas pipe 122 or the cooling water pipe.

Alternatively, as shown in (b) of Figure 5, in addition, the pipe 121 is configured to surround the exhaust gas pipe 122 discharged from the main engine 11 or the cooling water pipe to which the cooling water returns in a solenoid shape. , Seawater flowing through the pipe 121 is heated to a predetermined temperature by heat exchange outside the exhaust gas pipe 122 or the cooling water pipe.

That is, the heating unit 120 heats the pipe 121 with the waste heat recovered from the exhaust gas pipe 122 or the cooling water pipe to a predetermined temperature and supplies it to the storage tank 130 at the rear stage.

On the other hand, the heating unit 120, in addition to the main engine 11, may be configured as a waste heat recovery system (WHRS: Waste Heat Recovery System) 12.

Next, the storage tank 130 stores hot water that has passed through the heating unit 120.

For example, the storage tank 130, as shown in Figure 2, a water level sensor 131 that measures the level of hot water flowing from the pipe 121, and a pipe according to the water level measured by the water level sensor 131 A valve 132 that regulates hot water flowing from 121, a second temperature sensor 133 that detects the temperature of the hot water, and a storage tank 130 according to the temperature measured by the second temperature sensor 133 It may be composed of a heating module 134 for heating.

That is, by the configuration of the storage tank 130, the nozzle unit 140 always maintains a constant amount for high-pressure spraying of hot water, and the state of the hot water is always maintained at a high temperature capable of melting ice. can do.

Next, the nozzle unit 140 receives hot water from the storage tank 130 and sprays hot water into the stern hull or the rear of the stern in the form of high-pressure steam, so that the ice attached to the stern hull or approaching the stern side is removed by hot hot water. While melting, the ice is crushed into small pieces and pushed out of the stern hull.

For example, the nozzle unit 140, as shown in Figs. 3 (a) and 4 (a), is disposed to be rotatable under the water line (D), and the nozzle unit in a direction approximately perpendicular to the stern hull The hull mode for removing ice adhering to the stern hull surface by rotating 140 and spraying hot water, and a nozzle in the rear direction of the stern hull as shown in Figs. 3 (b) and 4 (b) It may be configured to rotate the unit 140 and drive in a rotation mode to remove ice approaching the stern hull by spraying hot water.

On the other hand, the nozzle unit 140, as shown in Figure 2, a nozzle 141 for high-pressure spraying of hot water, a rotation driving module 142 for rotating the nozzle 141 according to the hull mode and the rotation mode, A flexible connection pipe 143 interconnecting the nozzle 141 and the pipe 121, a first temperature sensor 144 sensing the temperature of the nozzle 141 and the flexible connection pipe 143, and a region adjacent to the stern hull The temperature or stern measured by the observation camera 145, the nozzle 141 and the heating coil 146 surrounding the flexible connector 143, and the first temperature sensor 144 or the observation camera 145 It may be composed of a control module 147 that prevents freezing by heating the heating coil 146 according to the hull condition.

Here, as shown in Figures 3 and 4, the rotation drive module 142 is a nozzle carrier (141a) in which the nozzle 141 is fixedly formed, and the hull mode and rotation by an electric motor and a reduction module or a hydraulic cylinder or a pneumatic cylinder. It can be rotated depending on the mode.

By the configuration of the nozzle unit 140, when freezing of the nozzle 141 or the flexible connector 143 according to a sudden drop in temperature in the polar environment, the first temperature sensor 144 or the observation camera 145 The freezing state may be recognized and, depending on the situation, freezing of the nozzle 141 or the flexible connector 143 may be prevented by the heating coil 146.

That is, in the hull mode, hot water is sprayed with high pressure through the nozzle 141 to remove ice attached to the hull, and in the rotation mode, the nozzle 141 is rotated from the hull by the rotation driving module 142 at a certain angle. Ice breaking is removed before being exposed and approaching the hull by high-pressure spray of hot water.

Therefore, by the configuration of the hot water spraying device for reducing ice resistance of polar ships as described above, by high-pressure spraying of hot water, the ice adhering to the hull surface below the water line or approaching the hull is removed, thereby reducing the propulsion force. Ice can be crushed by ice, and without additional deformation of the hull, ice can be crushed to improve the ice resistance of the ship, and without additional equipment, the seawater is heated by recovering waste heat from the existing main engine or waste heat recovery device. It is also possible to improve energy efficiency according to generation.

The embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations.

110: seawater suction unit 120: heating unit
121: pipe 122: exhaust gas pipe
130: storage tank 131: water level sensor
132: valve 133: second temperature sensor
134: heating module 140: nozzle part
141: nozzle 141a: nozzle carrier
142: rotation drive module 143: flexible connector
144: first temperature sensor 145: observation camera
146: heating coil 11: main engine
12: waste heat recovery device D: water line

Claims (7)

A seawater suction unit formed below the waterline of the polar ship to suck in seawater;
A heating unit for heating a pipe through which seawater introduced by the seawater suction unit flows;
A storage tank for storing hot water passing through the heating unit; And
Includes; a nozzle unit for melting and crushing ice by receiving hot water from the storage tank and spraying hot water to the rear of the stern hull or the stern,
The nozzle portion is fixed to the nozzle carrier and is disposed to be rotatable under the water line,
A hull mode in which the nozzle unit is rotated in a direction perpendicular to the stern hull and hot water is sprayed to remove ice adhering to the stern hull surface, and the stern is rotated in the rear direction of the stern hull and hot water is sprayed to the stern It is configured to drive in a rotating mode that removes ice approaching the hull,
In the hull mode, the nozzle portion is not exposed from the stern hull, and in the rotation mode, the nozzle portion is exposed at a predetermined angle from the hull. Hot water spraying device for reducing ice resistance of a polar ship. delete The method of claim 1,
The nozzle part,
A nozzle for high-pressure spraying of hot water;
A rotation drive module for rotating the nozzle according to the hull mode or rotation mode;
A flexible connection pipe connecting the nozzle and the pipe;
A first temperature sensor sensing the temperature of the nozzle and the flexible connection pipe;
An observation camera photographing an area adjacent to the stern hull;
A heating coil surrounding the nozzle and the flexible connector;
A control module for preventing freezing by heating the heating coil according to the temperature measured by the first temperature sensor or the observation camera or the stern hull condition; characterized in that it comprises, reducing the ice resistance of the polar ship. Hot water spraying device for The method of claim 1,
The hot water spraying device for reducing ice resistance of polar ships, characterized in that the nozzle part is formed below the water line. The method of claim 1,
The pipe is configured to pass through an exhaust gas pipe discharged from the main engine or a cooling water pipe through which cooling water returns,
The heating unit, characterized in that for heating the pipe to a predetermined temperature with waste heat recovered from the exhaust gas pipe or the cooling water pipe, the hot water spraying device for reducing ice resistance of polar ships. The method of claim 1,
The pipe is configured to surround the exhaust gas pipe discharged from the main engine or the cooling water pipe through which the cooling water returns, in a solenoid shape,
The heating unit, characterized in that for heating the pipe to a predetermined temperature with waste heat recovered from the exhaust gas pipe or the cooling water pipe, the hot water spraying device for reducing ice resistance of polar ships. The method of claim 1,
The storage tank includes a water level sensor that measures a level of hot water flowing in from the pipe, a valve that regulates hot water flowing from the pipe according to the water level measured by the water level sensor, and a device that detects the temperature of the hot water. A hot water spraying device for reducing ice resistance of polar ships, characterized in that consisting of two temperature sensors and a heating module that heats the storage tank according to the temperature measured by the second temperature sensor.

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