KR20230072232A - System and method for keeping viscosity of fuel oil and lubricating oil of vessel and vessel including the same - Google Patents

Abstract

The present invention relates to a system and method for maintaining the viscosity of fuel oil and lubricating oil of a ship, and a ship including the system, which includes a water tank for storing water, an exhaust gas boiler connected to the water tank, an auxiliary boiler connected to the water tank, and a water tank. A water supply line connecting the tank, the exhaust gas boiler and the auxiliary boiler, a steam supply line supplying steam generated from at least one of the exhaust gas boiler and the auxiliary boiler to a place of use, and an integrated control unit controlling the steam supply of the steam supply line Including, by installing an additional electric heater in the existing auxiliary boiler, it is possible to circulate and supply fuel oil and lubricants at a minimum by supplying used electric power such as ship generators and land power without burning fuel oil when berthed. It provides the advantage of preventing air pollution caused by

Description

Ship's fuel oil and lubricating oil viscosity maintenance system and method, ship including the same system

The present invention relates to a system and method for maintaining the viscosity of fuel oil and lubricating oil of a ship, and to a ship including the system, and more particularly, to a ship including the system, and more particularly, by supplying electric power used such as a ship generator and land power without fuel oil burning at anchor to minimize fuel A system and method for maintaining the viscosity of fuel oil and lubricating oil of a ship, which enables circulating supply of oil and lubricating oil and prevents air pollution due to exhaust gas, and a ship including the system.

Conventional ships use a heating system using steam to maintain the viscosity of ship fuel oil and engine lubricating oil supplied to the engine. To this end, the boiler is operated to generate and circulate steam even while at anchor, and steam is generated by the economizer that uses waste heat using the exhaust gas temperature of the main engine during operation, and the steam is stored and circulated through the boiler. are doing

The use of boilers, which require the use of ship fuel oil during berth, has problems related to pollution in the port, and has many problems, such as waste of fuel and boiler maintenance costs due to the use of boilers during navigation.

From an environmental point of view, if a boiler is used during berth or low-speed operation near a port, fuel oil is used, which additionally causes environmental pollution due to exhaust gas from the ship, which can be solved only by using high-quality oil for generators and boilers, resulting in economic loss. Sensitivity is inevitable.

From an economic point of view, the inefficient consumption of ship fuel oil for boiler operation and the steam generation or circulation distribution method by the boiler consume excessively more basic operating heat and fuel oil than the minimum required amount of steam, so fuel oil Since maintenance factors such as sedimentation and sticking of fuel oil in the boiler due to non-ignition occur, there are problems requiring periodic maintenance and continuous maintenance costs.

Moreover, there is a risk of a back fire accident due to stuck fuel or oil vapor in the case of insufficient maintenance of the boiler.

As a technology related to this prior art, there is a fuel oil heating supply system for a small ship disclosed in Japanese Laid-open Patent Publication No. 2011-025878, but the conventional problems could not be overcome by using a heater.

In addition, Korean Patent Registration No. 10-0485253 discloses a fuel heating device for ships and Korean Patent Registration No. 10-0873092 discloses a fuel heating device for ships. couldn't

As a technology using steam, Korean Patent Publication No. 10-2015-0145445 discloses a ship fuel oil heating method and a ship fuel oil heating device that performs the same, but consumes fuel oil to compensate for the heating deficiency of the steam heater However, it was difficult to resolve steam circulation and overheating, which was dangerous.

As a technique for solving the above problems, Korean Patent Registration No. 10-2246459 discloses a steam generation and storage circulation system for ships.

In the steam generation and storage circulation system for ships, the steam generated in the steam generator using waste heat is introduced into the steam generation storage circulation system and stored, and the steam is supplied to the heater through the supply steam temperature and pressure control valve while maintaining a constant pressure and temperature. supply, and is configured to recover the heated steam to the steam generating storage circulation device without back flow through the steam recovery control valve.

Such a steam generation and storage circulation system for ships is configured to heat and recover steam from a steam generation storage circulation device in a heater installed in an engine, so that the actual thermal efficiency is not high, and heat loss is reduced in the steam pipe of the heater and the steam generation storage circulation device. It was very likely to happen.

Japanese Unexamined Patent Publication No. 2011-025878 (Fuel Oil Heating Supply System for Small Ships, 2011.02.10) Korean Patent Registration No. 10-0485253 (Fuel heating device for ships, 2005.04.28, notice) Korean Patent Registration No. 10-0873092 (Fuel heating device for ships, 2008.12.09, notice) Korean Patent Publication No. 10-2015-0145445 (Marine fuel oil heating method and vessel fuel oil heating device performing the same, 2015.12.30) Korean Patent Registration No. 10-2246459 (Steam generation and storage circulation system for ships, published on 2021.04.30)

The present invention, by additionally installing an electric heater in the existing auxiliary boiler, makes it possible to circulate and supply minimum fuel oil and lubricants by supplying electric power used such as ship generators and land power sources without burning fuel oil at anchoring, and exhaust gas To provide a system and method for maintaining the viscosity of fuel oil and lubricating oil of a ship that prevents air pollution due to, and a ship including the system.

A system for maintaining the viscosity of fuel oil and lubricating oil of a ship according to an embodiment of the present invention includes a water tank in which water is stored; an exhaust gas boiler connected to the water tank and generating steam by recovering waste heat from engine exhaust gas; an auxiliary boiler connected to the water tank and equipped with an electric heater; a water supply line connecting the water tank, the exhaust gas boiler and the auxiliary boiler, and supplying water from the water tank to the exhaust gas boiler and the auxiliary boiler; and a steam supply line that supplies steam generated from at least one of the exhaust gas boiler and the auxiliary boiler to a place of use, and selectively supplies the steam to at least one storage of fuel oil and lubricating oil of the ship.

In addition, it may further include an integrated control unit connected to the steam supply line and controlling steam supply to any one or more storages of fuel oil and lubricating oil of the ship from the steam supply line side.

In addition, steam may be supplied to the steam supply line by operating the electric heater while the ship is anchored.

In addition, the steam supply line may include a steam discharge line connected to the exhaust gas boiler and the auxiliary boiler; a steam service line connected to the steam discharge line and servicing steam; a steam consumption line connected to the steam discharge line and supplying steam to one or more storages of fuel oil and lubricating oil of the ship; and a consumption control valve installed in the steam consumption line to block and allow flow of the steam.

In addition, a power supply line of a generator and land power may be connected to the electric heater.

In addition, a power panel for controlling the supply of power may be further installed in the power supply line.

In addition, the water tank line, a plurality of water pumps; and a plurality of water supply opening/closing valves for regulating water supply to the exhaust gas boiler and the auxiliary boiler.

In addition, a steam recovery line connected to the steam service line to cool used steam and return it to the water tank may be further included.

In addition, a condenser for cooling the used steam may be provided in the steam recovery line.

In addition, a steam dumping line connected to the steam service line and dumping excess steam of the steam service line toward the condenser may be further included.

In addition, it is connected to receive exhaust gas discharged from the exhaust gas boiler and to receive water from the water supply line, and heat absorbed water from exhaust gas discharged from the exhaust gas boiler is supplied to any one of the exhaust gas boiler and the auxiliary boiler. It may further include a residual heat recovery line connected to the exhaust gas boiler and the auxiliary boiler to supply to one or more sides.

In addition, the residual heat recovery line may include a residual heat recovery heat exchange unit connected to the exhaust gas boiler to receive exhaust gas discharged from the exhaust gas boiler and connected to the water supply line to receive water; a first heating water supply line connecting the residual heat recovery heat exchanger and the exhaust gas boiler and receiving water heated by residual heat of the exhaust gas discharged from the exhaust gas boiler; and a second heating water supply line connecting the residual heat recovery heat exchanger and the auxiliary boiler and receiving water heated by residual heat of exhaust gas discharged from the exhaust gas boiler.

In addition, a first recovery opening/closing valve may be provided in the first heating water supply line, and a second recovery opening/closing valve may be provided in the second heating water supply line.

In addition, the integrated control unit checks the steam pressure in the operating state of the exhaust gas boiler, but when the steam pressure of the exhaust gas boiler reaches a predetermined pressure, the first heating water supply line is operated to supply the heated water to the It can be supplied to the exhaust gas boiler side.

In addition, the integrated control unit operates the electric heater of the auxiliary boiler to set the steam pressure of the steam supply line to a certain level when the steam pressure of the exhaust gas boiler does not reach a preset pressure after the operation of the first heating water supply line. pressure can be maintained.

On the other hand, a method for maintaining the viscosity of fuel oil and lubricating oil of a ship according to another embodiment of the present invention is a method of maintaining the viscosity of fuel oil and lubricating oil of a ship using the above-described system for maintaining the viscosity of fuel oil and lubricating oil of a ship, the exhaust gas boiler stopping the operation of; operating the water supply line to supply water to the auxiliary boiler, and generating steam by operating the electric heater of the auxiliary boiler; and supplying the steam generated in the auxiliary boiler to one or more storages of fuel oil and lubricating oil of the ship through the steam supply line.

In addition, a vessel according to another embodiment of the present invention includes the above-described vessel fuel oil and lubricating oil viscosity maintenance system.

In the present invention described above, by additionally installing an electric heater in the existing auxiliary boiler, it is possible to circulate and supply minimum fuel oil and lubricating oil by supplying used electric power such as a ship generator and land power without fuel oil burning at anchoring. It is possible to provide a system and method for maintaining the viscosity of fuel oil and lubricating oil of a ship, which prevents air pollution due to exhaust gas, and a ship including the system.

1 is a system diagram of a fuel oil and lubricating oil viscosity maintenance system for a ship according to an embodiment of the present invention.
2 is an operating state diagram of the steam consumption line of FIG. 1;
FIG. 3 is an operating state diagram of the residual heat recovery heat exchanger of FIG. 1 .

Hereinafter, various embodiments of the present invention will be described with reference to specific embodiments shown in the accompanying drawings.

1 is a system diagram of a system for maintaining the viscosity of fuel oil and lubricating oil of a ship according to an embodiment of the present invention, and FIG. 2 is an operating state diagram of the steam consumption line of FIG. 1 .

1 and 2, the system for maintaining the viscosity of fuel oil and lubricating oil of a ship according to an embodiment of the present invention includes a water tank 100 in which water is stored, and an exhaust gas boiler connected to the water tank 100 ( 110), auxiliary boiler 120 connected to water tank 100, water supply line 130 connecting water tank 100 and exhaust gas boiler 110 and auxiliary boiler 120, exhaust gas boiler 110 ) And a steam supply line 140 for supplying steam generated from any one or more of the auxiliary boiler 120 to a place of use, and an integrated control unit 150 for controlling the steam supply of the steam supply line 140.

The water tank 100 provides source water, which is raw water for making steam in the exhaust gas boiler 110 and the auxiliary boiler 120, and is configured such that used steam and surplus steam are recovered as condensed water.

A water supply line 130 and a steam recovery line 160 are connected to the water tank 100, and an external supply line supplying raw water from the outside may be connected.

The exhaust gas boiler 110 is provided with a heat exchange structure between exhaust gas and water to generate steam by recovering waste heat from engine exhaust gas, and the exhaust line 115 connecting the main engine 111 and the stack 112 ), is connected to supply steam generated in the steam supply line 140, and can be connected to a residual heat recovery line 170 to be described later to receive heating water recovered from residual heat.

The auxiliary boiler 120 is connected to the water tank 100 and has an internal boiler 121 and an electric heater 122 for making steam, and is connected to supply steam to the steam supply line 140 side, It may be connected to a residual heat recovery line 170 to be described later to receive heating water.

The water supply line 130 connects the water tank 100, the exhaust gas boiler 110, and the auxiliary boiler 120, and supplies water in the water tank 100 to the exhaust gas boiler 110 and the auxiliary boiler 120. As for supplying water, it may include a pair of water pumps 131 and a water supply opening/closing valve 132 for regulating water supply to the exhaust gas boiler 110 and the auxiliary boiler 120. The pair of water pumps 131 may be used for injection, preliminary use, or both depending on the degree of water supply for steam generation, and the water supply opening/closing valve 132 may be provided as an electronic valve.

The steam supply line 140 supplies steam generated from any one or more of the exhaust gas boiler 110 and the auxiliary boiler 120 to a place of use and a required part, and any one of the ship's fuel oil and lubricating oil is used to maintain the viscosity. It is arranged to selectively provide to one or more repositories.

The steam supply line 140 includes a steam discharge line 140a connected to the exhaust gas boiler 110 and the auxiliary boiler 120, a steam service line 141 connected to the steam discharge line 140a and servicing steam, A steam consumption line 142 connected to the steam discharge line 140a and supplying steam to one or more storages of fuel oil and lubricating oil of a ship, and consumption installed in the steam consumption line 142 to block and allow the flow of steam. A control valve 145 may be included.

The steam discharge line 140a is branched into a steam service line 141 and a steam consumption line 142, and after the steam service line 141 and the steam consumption line 142 diverge, a steam dumping line 162 to be described below can be connected

A consumption control valve 145 is located in the steam consumption line 142 to control the supply of steam to the ship's engine.

When the ship is anchored, steam is generated by the operation of the auxiliary boiler 120, and in this embodiment, steam is generated and supplied by the electric heater 122. When the auxiliary boiler 120 is operating, the consumption control valve 145 of the steam consumption line 142 may be opened and closed at any time so that steam is supplied to the engine side.

The integrated control unit 150 is connected to the steam supply line 140 to control the supply of steam to one or more reservoirs of fuel oil and lubricating oil of the ship at the side of the steam supply line 140, and the electric heater 122 ) to supply steam to the steam supply line 140.

On the other hand, the electric heater 122 is controlled by the integrated control unit 150, and the power supply line 151 of the generator and land power is connected, and the power supply line 151 has a power panel 152 that controls the supply of power. ) can be installed.

In addition, in this embodiment, the steam recovery line 160 connected to the steam service line 141, having a condenser 161 for cooling used steam, and connecting the condenser 161 to the water tank 100, and a steam dumping line 162 connected to the steam service line 141 and dumping excess steam of the steam service line 141 toward the condenser 161.

The steam recovery line 160 and the steam dumping line 162 are devices for collecting condensed water and cooling and condensing the remaining excess steam after steam is used in a steam consuming area in the ship.

FIG. 3 is an operating state diagram of the residual heat recovery heat exchange unit 171 of FIG. 1 .

1 and 3, in this embodiment, the exhaust gas is supplied from the exhaust gas boiler 110 and connected to receive water from the water supply line 130, from the exhaust gas of the exhaust gas boiler 110 A residual heat recovery line 170 connected to the exhaust gas boiler 110 and the auxiliary boiler 120 may be further included to supply the absorbed water to the exhaust gas boiler 110 and the auxiliary boiler 120.

When low-sulfur fuel is used, the residual heat recovery line 170 secondarily recovers the residual waste heat of the exhaust gas that has passed through the exhaust gas boiler 110 through heat exchange in the residual heat recovery heat exchanger 171 to recover the water tank. After heating the feed water supplied from (100), it is a feed water heating device for supplying the heated feed water to the auxiliary boiler 120 or the exhaust gas boiler 110.

The residual heat recovery line 170 includes a residual heat recovery heat exchange unit 171 connected to the exhaust gas boiler 110 to receive exhaust gas and connected to the water supply line 130 to receive water, and a residual heat recovery heat exchange unit 171 A first heating water supply line 172 connected to the exhaust gas boiler 110 and supplied with water heated by residual heat and having a first recovery opening/closing valve 174, and a residual heat recovery heat exchange unit 171 and an auxiliary boiler It may include a second heating water supply line 173 connected to 120 and supplied with water heated by residual heat and having a second recovery opening/closing valve 175.

The residual heat recovery line 170 is controlled by the integrated control unit 150, and the first recovery opening/closing valve 174 and the second recovery opening/closing valve are provided to supply heating water to the exhaust gas boiler 110 and the auxiliary boiler 120. (175) is controlled.

The integrated control unit 150 checks the steam pressure in the operating state of the exhaust gas boiler 110, but operates the first heating water supply line 172 when the steam pressure of the exhaust gas boiler 110 reaches a predetermined pressure. and supplies the heated water to the exhaust gas boiler 110, and when the steam pressure of the exhaust gas boiler 110 is less than the preset pressure after the operation of the first heating water supply line 172, the auxiliary boiler 120 Integrated control is performed to maintain the steam pressure of the steam supply line 140 above a certain pressure by operating the electric heater 122 .

On the other hand, referring to FIGS. 1 to 3, the method for maintaining the viscosity of ship fuel oil and lubricating oil according to an embodiment of the present invention utilizes the above-described system for maintaining the viscosity of fuel oil and lubricating oil for ships, and exhausts the ship at anchorage. The operation of the gas boiler 110 is stopped, the water supply line 130 is operated to supply water to the auxiliary boiler 120, the electric heater 122 of the auxiliary boiler 120 is operated to generate steam, and the auxiliary boiler Each step of supplying the steam generated in 120 to any one or more storages of fuel oil and lubricating oil of the ship through the steam supply line 140, recovering steam from the steam supply line 140 and storing it in a cold storage .

In the present embodiments described above, the electric heater 122 is additionally installed in the existing auxiliary boiler 120, and the electric power used such as the ship generator and land power is supplied without fuel oil combustion during anchoring to minimize fuel It enables circulation and supply of oil and lubricating oil, and provides the advantage of preventing air pollution caused by exhaust gas.

As described above, the embodiments of the present invention have been described, but based on this, those skilled in the art can add or change components within the scope that does not deviate from the essential technical idea of the present invention described in the claims. The present invention may be variously modified and changed by deletion, addition, or the like, which is also included within the scope of the present invention.

100: water tank 110: exhaust gas boiler
111: main engine 112: stack
115: exhaust line 120: auxiliary boiler
121: internal boiler 122: electric heater
130: water supply line 131: water pump
132: water supply opening and closing valve 140: steam supply line
141: steam service line 142: steam consumption line
145: consumption control valve 150: integrated control unit
151: power supply line 152: power panel
160: steam recovery line 161: condenser
162: steam dumping line 170: residual heat recovery line
171: residual heat recovery heat exchange unit 172: first heating water supply line
173: second heating water supply line

Claims (17)

a water tank in which water is stored;
an exhaust gas boiler connected to the water tank and generating steam by recovering waste heat from engine exhaust gas;
an auxiliary boiler connected to the water tank and equipped with an electric heater;
a water supply line connecting the water tank, the exhaust gas boiler and the auxiliary boiler, and supplying water from the water tank to the exhaust gas boiler and the auxiliary boiler; and
Including a steam supply line that supplies steam generated in at least one of the exhaust gas boiler and the auxiliary boiler to a place of use, and selectively provides it to one or more storages of fuel oil and lubricating oil of the ship,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 1,
Further comprising an integrated control unit connected to the steam supply line and controlling steam supply to one or more storages of fuel oil and lubricating oil of the ship on the steam supply line side,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 2,
Supplying steam to the steam supply line by operating the electric heater while the ship is anchored,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 3,
The steam supply line,
a steam discharge line connected to the exhaust gas boiler and the auxiliary boiler;
a steam service line connected to the steam discharge line and servicing steam;
a steam consumption line connected to the steam discharge line and supplying steam to one or more storages of fuel oil and lubricating oil of the ship; and
A consumption control valve installed in the steam consumption line to block and allow the flow of the steam,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 3,
To the electric heater, the power supply line of the generator and the land power is connected,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 5,
A power panel for controlling the supply of power is further installed in the power supply line,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 3,
The water tank line,
a plurality of water pumps; and
Including a plurality of water supply opening and closing valves for controlling the supply of water to the exhaust gas boiler and the auxiliary boiler,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 4,
Further comprising a steam recovery line connected to the steam service line to cool the used steam and return it to the water tank.
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 8,
In the steam recovery line, a condenser for cooling the used steam is provided.
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 9,
Further comprising a steam dumping line connected to the steam service line and dumping excess steam of the steam service line toward the condenser.
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 3,
It is connected to receive exhaust gas discharged from the exhaust gas boiler and to receive water from the water supply line, and heat absorbed water from exhaust gas discharged from the exhaust gas boiler is supplied to at least one of the exhaust gas boiler and the auxiliary boiler. Further comprising a residual heat recovery line connected to the exhaust gas boiler and the auxiliary boiler to supply to the side,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 11,
The residual heat recovery line,
a residual heat recovery heat exchanger connected to the exhaust gas boiler to receive exhaust gas discharged from the exhaust gas boiler and connected to the water supply line to receive water;
a first heating water supply line connecting the residual heat recovery heat exchanger and the exhaust gas boiler and receiving water heated by residual heat of the exhaust gas discharged from the exhaust gas boiler; and
A second heating water supply line connecting the residual heat recovery heat exchanger and the auxiliary boiler and receiving water heated by the residual heat of the exhaust gas discharged from the exhaust gas boiler,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 12,
A first recovery opening/closing valve is provided in the first heating water supply line,
The second heating water supply line is provided with a second recovery opening and closing valve,
Ship's fuel oil and lubricating oil viscosity maintenance system. According to claim 13,
The integrated control unit,
Checking the steam pressure in the operating state of the exhaust gas boiler, but when the steam pressure of the exhaust gas boiler reaches a predetermined pressure, supplying heated water to the exhaust gas boiler by operating the first heating water supply line ,
Ship's fuel oil and lubricating oil viscosity maintenance system. 15. The method of claim 14,
The integrated control unit,
When the steam pressure of the exhaust gas boiler is less than the preset pressure after the operation of the first heating water supply line, the electric heater of the auxiliary boiler is operated to maintain the steam pressure of the steam supply line at a predetermined pressure or higher.
Ship's fuel oil and lubricating oil viscosity maintenance system. A method for maintaining the viscosity of fuel oil and lubricating oil of a ship using the system for maintaining the viscosity of fuel oil and lubricating oil of a ship according to any one of claims 1 to 15,
stopping the operation of the exhaust gas boiler;
operating the water supply line to supply water to the auxiliary boiler, and generating steam by operating the electric heater of the auxiliary boiler; and
Including the step of supplying the steam generated in the auxiliary boiler to any one or more reservoirs of fuel oil and lubricating oil of the ship through the steam supply line,
How to maintain the viscosity of fuel oil and lubricating oil for ships. A ship comprising the fuel oil and lubricating oil viscosity maintenance system according to any one of claims 1 to 15.

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