KR102224810B1 - A Regasification System Of Gas and Vessel having same - Google Patents

Abstract

In the ship having a gas regasification system according to the present invention, in a ship having a gas regasification system including a regasification device for regasifying liquefied gas through seawater supplied by a seawater supply device, the seawater supply device A seawater supply line for supplying the seawater to the regasification device; A seawater discharge line for discharging the seawater from the regasification device; And a circulation connection line branching from the seawater discharge line to connect the seawater supply line, wherein the circulation connection line comprises, when the seawater is switched to flow from the seawater discharge line to the circulation connection line, the seawater supply line Alternatively, it is characterized in that receiving the seawater flowing onto the seawater discharge line.

Description

Vessels equipped with a gas regasification system {A Regasification System Of Gas and Vessel having same}

The present invention relates to a ship with a gas regasification system.

In general, it is known that LNG is a clean fuel and its reserves are also richer than petroleum, and its usage is rapidly increasing as mining and transportation technologies are developed. Such LNG is generally stored in a liquid state by lowering the temperature to -162°C or less under 1 atmosphere of methane, the main component, and the volume of liquefied methane is about 1/600 of the volume of gaseous methane, which is a standard state, and specific gravity Silver is 0.42, which is about one-half of the specific gravity of crude oil.

LNG is liquefied for ease of transport and is vaporized at the place of use after transport. However, due to the risk of natural disasters and terrorism, we are concerned about installing LNG vaporization facilities on land.

Therefore, instead of the conventional liquefied natural gas regasification system installed on land, a regasification device is installed on an LNG carrier that transports liquefied natural gas to supply natural gas that has been vaporized on land. Is in the limelight.

In the LNG regasification system, the LNG stored in the liquefied gas storage tank is pressurized by a boosting pump and sent to the LNG carburetor, and vaporized to NG in the LNG carburetor and sent to customers on land. Here, a lot of energy is required in the process of heat exchange to increase the temperature of LNG on the LNG vaporizer. Therefore, in order to solve the problem that energy used in this process is wasted due to inefficient exchange, various heat exchange techniques for efficient regasification are being studied.

The present invention was created to improve the conventional technology, and is to provide a ship having a gas regasification system capable of maximizing the regasification efficiency of liquefied gas.

In the ship having a gas regasification system according to the present invention, in a ship having a gas regasification system including a regasification device for regasifying liquefied gas through seawater supplied by a seawater supply device, the seawater supply device A seawater supply line for supplying the seawater to the regasification device; A seawater discharge line for discharging the seawater from the regasification device; And a circulation connection line branching from the seawater discharge line to connect the seawater supply line, wherein the circulation connection line comprises, when the seawater is switched to flow from the seawater discharge line to the circulation connection line, the seawater supply line Alternatively, it is characterized in that receiving the seawater flowing onto the seawater discharge line.

Specifically, a seawater pump provided on the seawater supply line positioned lower than the sea level to supply the seawater to the regasification device; A first opening/closing valve disposed closer to a point connected to the seawater supply line on the circulation connection line; And a second opening/closing valve disposed closer to a point branching from the seawater discharge line on the circulation connection line, wherein the second opening/closing valve includes at least a portion of the seawater discharged to the seawater discharge line. Can be supplied as a prize.

Specifically, a third opening/closing valve provided upstream of the seawater pump on the seawater supply line; A fourth opening/closing valve provided downstream of the branch point of the circulation connection line on the seawater discharge line; And a control unit configured to implement a non-stop when switching the seawater to flow from the seawater discharge line to the circulation connection line by adjusting the opening degrees of the first to fourth opening/closing valves.

Specifically, when the seawater is switched to flow from the seawater discharge line to the circulation connection line, the control unit opens the second opening/closing valve to transfer at least a portion of the seawater discharged to the seawater discharge line to the circulation connection line. Can be controlled to feed into.

Specifically, when the seawater is full on the circulation connection line, the control unit may control to close the third and fourth on-off valves and open the first on-off valve.

Specifically, a seawater pump provided on the seawater supply line positioned lower than the sea level to supply the seawater to the regasification device; And a first branch line branched upstream of the regasification device on the seawater supply line and connected to the circulation connection line, wherein the first branch line is seawater supplied to the regasification device on the seawater supply line. At least some of them may be supplied to the circulation connection line.

Specifically, a first opening/closing valve disposed closer to a point connected to the seawater supply line on the circulation connection line; A second opening/closing valve disposed closer to a point branching from the seawater discharge line on the circulation connection line; A third opening/closing valve provided upstream of the seawater pump on the seawater supply line; A fourth opening/closing valve provided downstream of the branch point of the circulation connection line on the seawater discharge line; A first branch valve provided on the first branch line; Further comprising a control unit configured to implement a non-stop when switching the seawater to flow from the seawater discharge line to the circulation connection line by adjusting the opening degrees of the first to fourth opening/closing valves and the first branch valve. can do.

Specifically, the control unit, when switching the seawater to flow from the seawater discharge line to the circulation connection line, open the first branch valve, at least a portion of the seawater supplied to the regasification device on the seawater supply line It can be controlled to supply to the circulation connection line.

Specifically, the control unit controls to close the third and fourth on/off valves and the first branch valves and to open the first and second on/off valves when the seawater is full on the circulation connection line. can do.

Specifically, a seawater pump provided on the seawater supply line positioned lower than the sea level to supply the seawater to the regasification device; And a second branch line branched from a downstream of the regasification device on the seawater supply line and connected to the circulation connection line, wherein the second branch line is seawater discharged from the regasification device on the seawater supply line. At least some of them may be supplied to the circulation connection line.

Specifically, a first opening/closing valve disposed closer to a point connected to the seawater supply line on the circulation connection line; A second opening/closing valve disposed closer to a point branching from the seawater discharge line on the circulation connection line; A third opening/closing valve provided upstream of the seawater pump on the seawater supply line; A fourth opening/closing valve provided downstream of the branch point of the circulation connection line on the seawater discharge line; A second branch valve provided on the second branch line; Further comprising a control unit configured to implement a non-stop when switching the seawater to flow from the seawater discharge line to the circulation connection line by adjusting the opening degrees of the first to fourth opening/closing valves and the second branch valves. can do.

Specifically, the control unit, when switching the seawater to flow from the seawater discharge line to the circulation connection line, open the second branch valve, at least a part of seawater discharged from the regasification device on the seawater discharge line It can be controlled to supply to the circulation connection line.

Specifically, the control unit controls to close the third and fourth on/off valves and the second branch valves and to open the first and second on/off valves when the seawater is full on the circulation connection line. can do.

Specifically, a pressure maintaining device provided on the circulation connection line and maintaining the pressure of seawater flowing through the circulation connection line may be further included.

Specifically, the pressure maintaining device may maintain the pressure of seawater using atmospheric pressure.

Specifically, the regasification device may include a vaporizer for directly vaporizing the liquefied gas into the seawater.

Specifically, the regasification device comprises: a vaporizer for vaporizing the liquefied gas into an intermediate heat medium; And a heat source heat exchanger for supplying the heat source of seawater to the intermediate heat medium.

Specifically, the first on-off valve is a non-stop switching valve, the second on-off valve is a circulation valve, the third on-off valve is a seawater supply valve, and the fourth on-off valve is a seawater discharge valve, The control unit may be a fourth control unit.

A ship having a gas regasification system according to the present invention has the effect of maximizing the regasification efficiency of liquefied gas.

1 is a conceptual diagram of a ship equipped with a gas regasification system according to an embodiment of the present invention.
2 is a conceptual diagram of a seawater supply apparatus according to a first embodiment of the present invention.
3 is a conceptual diagram of a seawater supply device according to a second embodiment of the present invention.
4 is a conceptual diagram of a seawater supply apparatus according to a third embodiment of the present invention.
5 is a conceptual diagram of a seawater supply device according to a fourth embodiment of the present invention.
6 is a conceptual diagram of a seawater supply device according to a fifth embodiment of the present invention.
7 is a conceptual diagram of a seawater supply apparatus according to a sixth embodiment of the present invention.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings. In adding reference numerals to elements of each drawing in the present specification, it should be noted that, even though they are indicated on different drawings, only the same elements are to have the same number as possible. In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, in the present specification, liquefied gas may be used in the sense of encompassing all gaseous fuels generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, etc., and liquefied gas is also for convenience when not in a liquid state by heating or pressurization. It can be expressed as This can be applied to boil-off gas as well. In addition, for convenience, LNG can be used to mean not only NG (Natural Gas) in a liquid state, but also NG in a supercritical state, and the evaporation gas is used to mean not only gaseous evaporation gas but also liquefied evaporation gas. I can.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of a ship equipped with a gas regasification system according to an embodiment of the present invention.

As shown in Figure 1, the gas regasification system 1 according to the embodiment of the present invention, a liquefied gas storage tank 10, a feeding pump 20, a buffer tank 30, a boosting pump 40, It includes a vaporizer 50, a customer 60, and a seawater supply device 100.

Here, the ship (symbol not shown) in which the gas regasification system 1 is installed has a hull H composed of a bow part (symbol not shown), a stern part (symbol not shown), and an upper deck (symbol not shown). The propeller shaft (S) transmits the power produced by the engine (E) in the engine room (not shown) disposed at the stern and operates by transmitting the power to the propeller (P).

In addition, the ship regasifies liquefied gas by installing a gas regasification system 1 on a liquefied gas carrier (not shown) in order to regasify the liquefied gas at sea and supply the liquefied gas to the onshore terminal. It may be a ship (LNG RV) or a floating liquefied gas storage and regasification facility (FSRU).

Hereinafter, a gas regasification system 1 according to an embodiment of the present invention will be described with reference to FIG. 1.

In the gas regasification system 1 according to the embodiment of the present invention, the liquefied gas in a liquid state is removed from the liquefied gas storage tank 10 through the feeding pump 20 and the boosting pump 40 is passed through the buffer tank 30. After being pressurized, the liquefied gas is heated by a heat source in the vaporizer 50 to regasify it and supply it to the customer 60. That is, in brief, the gas regasification system 1 of the present invention regasifies the liquefied gas using the vaporizer 50 and supplies it to the customer 60.

The vaporizer 50 can receive seawater directly from the seawater supply device 100 to regasify the liquefied gas (direct regasification method), and recover the liquefied gas by receiving seawater indirectly from the seawater supply device 100 (Indirect regasification method; a method in which glycol water, an intermediate fruit, is supplied with a heat source of seawater from the heat source heat exchanger 110, and the intermediate fruit supplies a heat source supplied from the seawater to the vaporizer 50)

In all the embodiments of the present invention, the description is made based on the indirect regasification method, and this is for convenience of explanation only, and it is to be noted that the reason is not particularly limited in the present invention. The regasification device is a direct regasification method. Referring only to (50), in the indirect regasification method, the vaporizer 50 and the heat source heat exchanger 110 may be collectively referred to, and for convenience, the heat source heat exchanger 110 may be referred to.

The gas regasification system 1 according to the embodiment of the present invention may further include a liquefied gas supply line RL, and valves (not shown) capable of adjusting the opening degree are installed on the liquefied gas supply line RL. The supply amount of the liquefied gas or the vaporized liquefied gas may be controlled according to the adjustment of the opening degree of each valve.

The liquefied gas supply line RL connects the liquefied gas storage tank 10 and the customer 60, and includes a feeding pump 20, a buffer tank 30, a boosting pump 40, and a vaporizer 50. , After regasifying the liquefied gas stored in the liquefied gas storage tank 10, it can be supplied to the customer 60.

Hereinafter, individual components implementing the gas regasification system 1 according to the embodiment of the present invention will be described in detail.

The liquefied gas storage tank 10 stores liquefied gas to be supplied to the customer 60. The liquefied gas storage tank 10 should store the liquefied gas in a liquid state. At this time, the liquefied gas storage tank 10 may have a form of a pressure tank.

Here, the liquefied gas storage tank 10 is disposed inside the hull H, and may be formed in four, for example, in front of the engine room. In addition, the type of the liquefied gas storage tank 10 is not particularly limited in various forms such as a membrane-type tank, but not limited thereto, and a stand-alone tank, for example.

The feeding pump 20 is provided on the liquefied gas supply line RL, and is installed inside or outside the liquefied gas storage tank 10 to transfer the liquefied gas stored in the liquefied gas storage tank 10 to the buffer tank 30 Can be supplied with.

Specifically, the feeding pump 20 is provided between the liquefied gas storage tank 10 and the buffer tank 30 on the liquefied gas supply line RL, and supplies the liquefied gas stored in the liquefied gas storage tank 10 first. It can be supplied to the buffer tank 30 by pressurization.

The feeding pump 20 may pressurize the liquefied gas stored in the liquefied gas storage tank 10 to 6 to 8 bar and supply it to the buffer tank 30. Here, the feeding pump 20 may pressurize the liquefied gas discharged from the liquefied gas storage tank 10 to slightly increase the pressure and temperature, and the pressurized liquefied gas may still be in a liquid state.

At this time, the feeding pump 20 may be a submerged pump when provided inside the liquefied gas storage tank 10, and stored in the liquefied gas storage tank 10 when installed outside the liquefied gas storage tank 10. It may be provided at a position inside the hull (H) lower than the level of the liquefied gas, and may be a centrifugal pump.

The buffer tank 30 may be provided on the liquefied gas supply line RL to receive the liquefied gas from the liquefied gas storage tank 10 and temporarily store the liquefied gas.

Specifically, the buffer tank 30 can receive the liquefied gas stored in the liquefied gas storage tank 10 from the feeding pump 20 through the liquefied gas supply line RL, and temporarily store the supplied liquefied gas. Liquefied gas may be separated into a liquid phase and a gas phase, and the separated liquid phase may be supplied to the boosting pump 40.

That is, the buffer tank 30 temporarily stores liquefied gas to separate the liquid phase from the gas phase, and then supplies the complete liquid phase to the boosting pump 40 so that the boosting pump 40 satisfies the effective suction head (NPSH). , This makes it possible to prevent cavitation in the boosting pump 40.

The boosting pump 40 may be provided between the buffer tank 30 and the vaporizer 50 on the liquefied gas supply line RL, and from the liquefied gas supplied from the feeding pump 20 or the buffer tank 30 The supplied liquefied gas may be pressurized to 50 to 120 bar and supplied to the vaporizer 50.

The boosting pump 40 may pressurize the liquefied gas according to the pressure required by the customer 60, and may be configured as a centrifugal pump.

The vaporizer 50 may be provided on the liquefied gas supply line RL to regasify the high-pressure liquefied gas discharged from the boosting pump 40.

Specifically, the vaporizer 50 is provided on the liquefied gas supply line RL between the customer 60 and the boosting pump 40, and vaporizes the high-pressure liquefied gas supplied from the boosting pump 40 to vaporize the customer 60 ) Can be supplied in the desired condition.

The carburetor 50 receives the intermediate heat medium through the heat source circulation line GWL, heat exchange with the liquefied gas to vaporize the liquefied gas, and circulate the intermediate heat exchanged with the liquefied gas again through the heat source circulation line GWL.

The vaporizer 50 may be provided with a heat source heat exchanger 110 on the heat source circulation line (GWL) to continuously supply a heat source to the first heat medium, and additionally equipped with a heat source pump (GWP) to provide the first heat source as a heat source. It can be circulated through the circulation line GWL.

At this time, the vaporizer 50 may use a non-explosive fruit such as glycol water, sea water, steam or engine exhaust gas as a first heat medium for vaporizing cryogenic liquefied gas, The high-pressure vaporized liquefied gas can be supplied to the consumer 60 without pressure fluctuation.

Here, the heat source supply device 110 receives a heat source through seawater and transfers the heat source to the vaporizer 50, and a device that transfers seawater to the heat source supply device 110 is referred to as a seawater supply device 100.

The seawater supply device 100 supplies seawater, which is a heat source for regasifying liquefied gas by a regasification device (heat source heat exchanger 110), to a regasification device, and an open loop operation type as a driving method. ) And Close loop operation type.

Here, the open loop operation type refers to a case in which seawater is supplied and discharged only in one direction from the seawater supply line (L1) to the seawater discharge line (L2), and the closed loop driving method (Close Loop operation tyoe) refers to a seawater supply line (L1), a seawater discharge line (L2), a circulation connection line (L3), and then to a seawater supply line (L1), a seawater discharge line (L2), and a circulation connection line (L3). It refers to the case where seawater is circulated.

In an embodiment of the present invention, the seawater supply device 100 can be switched in both directions from an open loop driving method to a closed loop driving method. The change in the driving method of the seawater supply device 100 is caused by a temperature change of seawater.

In summer, the temperature of seawater is high, so seawater can be used as a heat source for regasification of liquefied gas. However, in winter, the temperature of seawater was low, so seawater could not be used as a heat source for regasification of liquefied gas. Accordingly, seawater must be heated to be used as a heat source for regasification of liquefied gas.

Accordingly, in order to reduce the supply of the heating source and efficiently use energy, the seawater supply device 100 is driven in an open circuit, that is, an open loop driving method, in summer, and in winter, the seawater supply device 100 is driven in a closed circuit, that is, a closed loop. It was operated by switching to the method.

Conventional seawater supply device (not shown), when switching from the open-loop driving method to the closed-loop driving method, the internal packing fluid (air; air) on the circulation connection line (L3) that is not used in the open-loop driving method. Since it must be removed, there is a problem that the operation of the seawater supply device must be stopped for two to three days.

This is because if the inner packing fluid on the circulation connection line (L3) is not removed and used as it is, air is introduced into the seawater pump 140, causing cavitation to occur in the seawater pump 140, resulting in a risk of inoperability. There is a reason.

Accordingly, in the embodiment of the present invention, in order to solve the above problems, the seawater supply device 100 in the embodiment of the present invention can be implemented as a non-stop when switching in both directions from an open loop driving method to a closed loop driving method. I can.

Below. A detailed look at the seawater supply device (100a to f) with reference to FIGS. 2 to 7, reference numerals 120, 130, 140, L4, SW1, and SW2, which are not described in FIG. 1, respectively, have a heater 120, pressure maintenance. When describing the seawater supply device 100 in FIGS. 2 to 7 with the device 130, the seawater pump 140, the pressure maintaining device connection line L4, the seawater inlet SW1 and the seawater outlet SW2, Please describe in detail.

2 is a conceptual diagram of a seawater supply apparatus according to a first embodiment of the present invention.

As shown in Figure 2, the seawater supply device 100a includes a heat source heat exchanger 110, a heater 120, a pressure maintenance device 130, a seawater pump 140, an intermediate tank 150, and a first control unit ( 170).

Prior to describing the individual configurations of the seawater supply apparatus 100a according to the embodiment of the present invention, basic flow paths organically connecting the individual components will be described. Here, the flow path may be a line through which a fluid flows, and is not limited thereto, and any configuration in which a fluid flows is possible.

In an embodiment of the present invention, a seawater supply line (L1), a seawater discharge line (L2), a circulation connection line (L3), and a pressure maintenance device connection line (L4) may be further included. Valves (not shown) capable of adjusting the opening degree may be installed in each line, and the supply amount of seawater or fluid may be controlled according to the adjustment of the opening degree of each valve.

The seawater supply line L1 connects the seawater inlet SW1 and the heat source heat exchanger 110, and can supply seawater supplied from the seawater inlet SW1 to the heat source heat exchanger 110 through the seawater pump 140. have.

The seawater supply line L1 may include a seawater pump 140, a seawater inlet valve B1, and a heater 120, and may be disposed below at least some sea level. Here, the seawater inlet SW1 may be located about 5m below the sea level, and the seawater inlet valve B1 may be provided upstream of the seawater pump 140 on the seawater supply line L1.

The seawater discharge line L2 connects the heat source heat exchanger 110 and the seawater outlet SW2, and may discharge seawater discharged from the heat source heat exchanger 110 to the seawater outlet SW2.

The seawater discharge line L2 may include a seawater discharge valve B2, and may be disposed at least partially below the sea level. Here, the seawater outlet SW2 may be located about 1.6m below the sea level, and the seawater discharge valve B2 may be provided downstream from the branch point of the circulation connection line L3a on the seawater discharge line L2.

The circulation connection line (L3) is branched from the seawater discharge line (L2) to connect the seawater supply line (L1), and the seawater discharge line (L2) so that the seawater flows when the seawater supply device (100a) is driven in a closed loop driving method. ) By resupplying the seawater discharged to the seawater supply line, it is possible to circulate seawater.

Specifically, the circulation connection line (L3) is branched upstream of the seawater discharge valve (B2) on the seawater discharge line (L2), and is between the seawater supply valve (B1) and the seawater pump (140) on the seawater supply line (L1). It may be connected, and may be provided with a circulation valve (B3). Here, a point at which the circulation connection line L3 diverges from the upstream of the seawater discharge valve B2 on the seawater discharge line L2 may be located at a position approximately 20m higher from the sea level.

In the seawater supply apparatus 100a according to the present embodiment, the circulation connection line L3 may include a circulation connection line L3a and an intermediate tank bypass line L3b. Here, the circulation connection line (L3a) may include an intermediate tank 150, a circulation valve (B3), and an intermediate tank supply valve (B6), and the intermediate tank bypass line (L3b) is on the circulation connection line (L3a). It is configured to bypass the intermediate tank 150 and may include an intermediate tank bypass valve B5.

The circulation valve B3 may be provided closer to the branch point with the seawater discharge line L2 than the intermediate tank 150 on the circulation connection line L3a, and the intermediate tank supply valve B6 is a circulation connection line ( It may be provided closer to the intermediate tank 150 than the branch point with the seawater discharge line L2 on L3a).

The bypass line L3b may be performed so that seawater flowing on the circulation connection line L3a bypasses the intermediate tank 150 when the intermediate tank 150 is filled with seawater.

The pressure holding device connection line (L4) connects the pressure holding device 130 and the circulation connection line (L3a), and when the seawater supply device (100a) is driven by a closed loop driving method, the pressure is maintained by the circulation connection line (L3a). Seawater stored in the device 130 may be supplied. Here, the pressure maintaining device connection line L4 may include a pressure maintaining device supply valve B4.

Hereinafter, individual components that are organically formed by the above-described lines L1 to L4 to implement the seawater supply device 100a will be described.

The heat source heat exchanger 110 is connected to the seawater supply line L1 and the seawater discharge line L2, and may be disposed at a position higher than sea level and approximately 30m above sea level.

The heat source heat exchanger 110 may receive seawater through the seawater supply line L1 and transmit a heat source to the intermediate fruit, and discharge seawater that has heat-exchanged with the intermediate fruit through the seawater discharge line L2.

Here, the heat source heat exchanger 110 may be a shell & tube type or a printed circuit board type heat exchanger (PCHE).

The heater 120 is provided between the heat source heat exchanger 110 and the seawater pump 140 on the seawater supply line L1, and may be disposed at a position higher than the sea level and approximately 30m from the sea level.

The heater 120 receives seawater through the seawater supply line L1, heats it, and supplies it to the heat source heat exchanger 110, and may be operated when the seawater supply device 100a is driven by a closed loop driving method. That is, when the temperature of the seawater is too low and the heat source heat exchanger 110 cannot transfer a required amount of heat to the intermediate fruit, the temperature of the seawater may be heated.

In this case, the heater 120 may receive a heat source such as steam from a boiler (not shown) to heat seawater, but is not limited thereto and may be an electric heater.

The pressure maintaining device 130 is provided on the circulation connection line L3a and may maintain the pressure of seawater flowing in the circulation connection line L3a.

Specifically, the pressure maintenance device 130 may be connected through a pressure maintenance device connection line L4 between a point connected to the seawater supply line L1 in the circulation connection line L3a and the intermediate tank 150, When the seawater supply device 100a is driven by the closed loop driving method, the pressure of the seawater flowing on the circulation connection line L3a can be maintained with the fluid stored therein by opening the pressure maintaining device supply valve L4. .

At this time, the pressure maintaining device 130 is located approximately 35m higher from the sea level and is configured as a container open so that the upper side communicates with the atmosphere, and can maintain the pressure of the seawater using atmospheric pressure.

That is, in the embodiment of the present invention, the pressure maintaining device 130 located approximately 35m higher from the sea level is connected to the circulation connection line L3a located approximately 5m lower from the sea level, so that the pressure maintaining device 130 is (Approximately 40m; 4bar) can be used to compensate for the pressure of seawater flowing into the seawater pump 140, through which the circulation connection line (L3a), the seawater supply line (L1), and the seawater discharge line (L2) It can keep the pressure of circulating seawater constant.

The seawater pump 140 may be provided on the seawater supply line L1 to supply seawater to the regasification device, that is, the heat source heat exchanger 110.

Specifically, the seawater pump 140 is provided between the seawater supply valve B1 on the seawater supply line L1 and the heater 120, and pressurizes seawater supplied from the seawater inlet SW1 to pressurize the heater 120. Then, it can be supplied to the heat source heat exchanger 110.

The sea water pump 140 may be disposed at a position lower than the sea level inside the hull H, and the heat source heat exchanger 110 and the heater 120 may be disposed at a position higher than the sea level inside the hull H. For example, the sea water pump 140 may be disposed at a position about 5 m lower than the sea level inside the hull H, and the heat source heat exchanger 110 and the heater 120 are 30 m higher than the sea level inside the hull H Can be placed in position.

Therefore, in order to supply seawater from the seawater pump 140 to the heat source heat exchanger 110 and the heater 120, the seawater pump 140 pressurizes the seawater as much as it can overcome the water head (about 35m) of seawater. Can, for example, can be pressurized with a pressure of about 3.5 bar or more.

The intermediate tank 150 is provided on the circulation connection line L3a, so that seawater flows from the seawater discharge line L2 to the circulation connection line L3a. -Stop).

Specifically, the intermediate tank 150 is located on the circulation connection line (L3a) located higher than the sea level, and stores at least a portion of seawater inside in order to be implemented as a non-stop when driven by a closed loop driving method. You can keep one state.

That is, the intermediate tank 150 is provided on the circulation connection line L3a in a state higher than the sea level, so that even when the seawater supply device 100a is driven by the open loop driving method, the seawater is supplied to the inside by atmospheric pressure. Some can be stored and the circulation connection line (L3a) located below the intermediate tank 150 is all filled with seawater. At this time, a portion higher than sea level in the intermediate tank 150 is filled with air, and a portion higher than sea level on the circulation connection line L3a is also filled with air.

Therefore, the seawater supply device 100a in the present invention is in the circulation connection line L3a in the direction of the seawater pump 140 when the seawater supply device 100a is switched from the open loop driving method to the closed loop driving method. Since seawater is already full, it is possible to switch the seawater pump 140 without stopping.

The intermediate tank 150 may further include an intermediate tank discharge valve B7 for discharging the packing fluid remaining on the circulation connection line L3a.

The intermediate tank discharge valve (B7) is a packing fluid that is gradually concentrated by seawater that is pushed to the intermediate tank 150 by opening the opening when the seawater supply device 100a is switched from the open loop driving method to the closed loop driving method. Can be discharged to the outside.

The first control unit 170 adjusts the opening of the seawater supply valve (B1), the seawater discharge valve (B2), the circulation valve (B3), the intermediate tank bypass valve (B5), and the intermediate tank supply valve (B6), When the seawater is switched to flow from the seawater discharge line (L2) to the circulation connection line (L3a), that is, when the seawater supply device (100a) is switched from the open-loop driving method to the closed-loop driving method, it is implemented as a non-stop. Can be controlled.

Here, the first control unit 170 includes a seawater supply valve (B1), a seawater discharge valve (B2), a circulation valve (B3), an intermediate tank bypass valve (B5), and an intermediate tank supply valve (B6) and wired or wirelessly. It is connected so that the opening degree of each of the valves B1 to B6 can be adjusted.

When the seawater supply device 100a is switched from the open loop driving method to the closed loop driving method, the first control unit 170 includes a circulation valve B3 and an intermediate tank supply valve until the intermediate tank 150 is filled with seawater. (B6) can be opened.

Specifically, the first control unit 170, that is, when the seawater supply device 100a is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 are in an open state. And the intermediate tank bypass valve (B5) is controlled to maintain the closed state, and the circulation valve (B3) and the intermediate tank supply valve (B6) can be controlled to switch from the closed state to the open state. .

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1) and is discharged to the seawater discharge port (SW2) through the seawater discharge line (L2), and at the same time, at least a portion of the seawater passing through the seawater discharge line (L2). Is introduced into the circulation connection line L3a and fills the seawater with the intermediate tank 150.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100a can be continuously switched from an open loop driving method to a closed loop driving method.

The first control unit 170 maintains the circulation valve B3 and the intermediate tank supply valve B6 in an open state until the intermediate tank 150 is filled with seawater, and the intermediate tank 150 is filled with seawater. At the moment, the circulation valve (B3) is kept open, while the seawater supply valve (B1), the seawater discharge valve (B2), and the intermediate tank supply valve (B6) are closed, and the intermediate tank bypass valve (B5) is closed. Can be controlled to open.

At this time, seawater is supplied from the seawater pump 140, passes through the seawater supply line L1, flows into the circulation connection line L3a through the seawater discharge line L2, and the seawater flows into the circulation connection line L3a is intermediate. After passing through the tank bypass line L3b, it is again joined to the circulation connection line L3a, and is then supplied to the seawater supply line L1 to circulate the seawater in a closed loop. That is, seawater is continuously supplied to the seawater supply line (L1), seawater discharge line (L2), circulation connection line (L3a), intermediate tank bypass line (L3b), circulation connection line (L3a), and seawater supply line (L1). It becomes a cycle.

As described above, in the embodiment of the present invention, when the seawater supply device 100a is switched from the open loop driving method to the closed loop driving method, the packing fluid remaining in the circulation connection line L3a, that is, air can be stably removed. , There is an effect that the conversion of the driving method can be made non-stop, and thus the supply and demand of the regasified liquefied gas to the consumer 60 is smoothly performed.

3 is a conceptual diagram of a seawater supply device according to a second embodiment of the present invention.

As shown in FIG. 3, the seawater supply device 100b includes a heat source heat exchanger 110, a heater 120, a pressure maintenance device 130, a seawater pump 140, an orifice 160, and a second control unit 171. ) And non-stop switching valve (B3).

Here, the heat source heat exchanger 110, the heater 120, the pressure maintaining device 130, and the seawater pump 140 are the same as those described in the seawater supply device 100a according to the first embodiment of the present invention. do.

Before describing the individual configurations of the seawater supply apparatus 100b according to the embodiment of the present invention, basic flow paths organically connecting the individual components will be described. Here, the flow path may be a line through which a fluid flows, and is not limited thereto, and any configuration in which a fluid flows is possible.

In an embodiment of the present invention, a seawater supply line (L1), a seawater discharge line (L2), a circulation connection line (L3), and a pressure maintenance device connection line (L4) may be further included. Valves (not shown) capable of adjusting the opening degree may be installed in each line, and the supply amount of seawater or fluid may be controlled according to the adjustment of the opening degree of each valve. Here, the seawater supply line L1, the seawater discharge line L2, and the pressure maintaining device connection line L4 are the same as those described in the seawater supply apparatus 100a according to the first embodiment of the present invention, so they will be substituted.

The circulation connection line (L3) is branched from the seawater discharge line (L2) to connect the seawater supply line (L1), and the seawater discharge line (L2) so that the seawater flows when the seawater supply device (100b) is driven in a closed loop driving method. ) By resupplying the seawater discharged to the seawater supply line (L1), it is possible to circulate seawater.

Specifically, the circulation connection line (L3) is branched upstream of the seawater discharge valve (B2) on the seawater discharge line (L2), and is between the seawater supply valve (B1) and the seawater pump (140) on the seawater supply line (L1). It can be connected, and can be provided with a non-stop switching valve (B8). Here, a point where the circulation connection line L3 diverges from the upstream of the seawater discharge valve B2 on the seawater discharge line L2 may be located at a position approximately 5m lower from the sea level.

Hereinafter, individual components that are organically formed by the above-described lines L1 to L4 to implement the seawater supply device 100b will be described.

When the orifice 160 is switched so that seawater flows from the seawater discharge line (L2) to the circulation connection line (L3), that is, the seawater supply device (100b) is switched from an open loop driving method to a closed loop driving method or a closed loop driving method When driven by the method, the pressure of seawater supplied to the heat source heat exchanger 110 through the seawater supply line L1 is adjusted. That is, when the seawater supply device 100b is driven in a closed loop driving method, the orifice 160 may depressurize and supply seawater supplied to the heat source heat exchanger 110.

Here, the orifice 160 may have a shape in which the central portion is recessed as a pressure device, and any device capable of decompressing seawater is not limited to an orifice and may be replaced with a variety of devices.

In the embodiment of the present invention, the seawater pump 140 does not change the pressure of the seawater discharged even when the seawater supply device 100b switches from the open loop driving method to the closed loop driving method. Therefore, when the seawater flows through the closed loop space, the head of the seawater is removed, so that a lot of pressurization through the seawater pump 140 is not required.

That is, the seawater pump 140 may compensate for the pressure loss due to the internal resistance of devices that use seawater in the closed-loop driving method, for example, the heater 120 or the heat source heat exchanger 110, and the open-loop driving method Since the pressure at is used as it is, excessive pressure is introduced into the heater 120 or the heat exchanger 110 to generate vibration and noise.

In order to solve this problem, in the embodiment of the present invention, in addition to the orifice 160, an orifice bypass line (L8), a seawater shutoff valve 161 and a bypass valve 162 are further provided. 160) is not used, and the orifice 160 is driven when driven by a closed loop driving method, thereby solving the problem of vibration and noise.

Here, the orifice 160 may be provided on the orifice bypass line L8 to reduce the incoming seawater and supply seawater to the heat source heat exchanger 110.

The seawater shutoff valve 161 is provided between the heater 120 on the seawater supply line L1 and the heat source heat exchanger 110, and is opened when the seawater supply device 100b is driven by an open loop driving method, and is closed loop. It can be closed when driven by a drive method.

The bypass valve 162 is disposed upstream of the orifice 160 on the orifice bypass line L8, and is closed when the seawater supply device 100b is driven by an open loop driving method, and when driven by a closed loop driving method. It can be opened.

The orifice bypass line L8 is branched between the heater 120 and the seawater shutoff valve 161 on the seawater supply line L1, and again, the seawater shutoff valve 161 and the heat source heat exchanger on the seawater supply line L1. It is connected between 110, and when the seawater supply device 100b is driven by the open loop driving method, seawater does not flow in, and when the seawater supply device 100b is driven by the closed loop driving method, seawater is introduced and the seawater shut-off valve 161 is bypassed. Seawater may be supplied to the furnace heat source heat exchanger 110.

Through this, in the embodiment of the present invention, the seawater reduced by the heat source heat exchanger 110 is provided with an orifice 160, an orifice bypass line (L8), a seawater shutoff valve 161, and a bypass valve 162. By supplying, there is an effect of reducing vibration and noise.

The second control unit 171 adjusts the opening degree of the seawater supply valve B1, the seawater discharge valve B2, and the non-stop switching valve B8, so that the seawater is discharged from the seawater discharge line L2 to the circulation connection line L3. When switching to flow, that is, when the seawater supply device 100b is switched from an open loop driving method to a closed loop driving method, it can be controlled to be implemented as a non-stop.

Here, the second control unit 171 is connected to the seawater supply valve B1, the seawater discharge valve B2, and the non-stop switching valve B8 by wire or wirelessly to determine the opening degree of each of the valves B1, B2, and B8. Can be adjusted.

The second control unit 171, when switching the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100b) is switched from the open-loop driving method to the closed-loop driving method, By opening the opening of the non-stop switching valve (B8) and closing the opening of the seawater supply valve (B1) and the seawater discharge valve (B2), the seawater supply line (L1), the seawater discharge line (L2) and the circulation connection line (L3) can be controlled to cycle.

Specifically, the second control unit 171, when the seawater supply device 100b switches from the open-loop driving method to the closed-loop driving method, immediately opens the non-stop switching valve B8 and at the same time the seawater supply valve B1 ) And the opening of the seawater discharge valve (B2) can be controlled to close.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100b can be continuously switched from the open loop driving method to the closed loop driving method.

At this time, the seawater is supplied from the seawater pump 140, passes through the seawater supply line (L1), flows into the circulation connection line (L3) through the seawater discharge line (L2), and the seawater introduced into the circulation connection line (L3) is seawater. The seawater is supplied to the supply line L1 and circulates in a closed loop. That is, seawater is continuously circulated to the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

In addition, the second control unit 171, when switching the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3) by adjusting the opening degree of the seawater shut-off valve 161 and the bypass valve 162, That is, when the seawater supply device 100b is switched from an open loop driving method to a closed loop driving method or driven by a closed loop driving method, it is possible to control the inflow of seawater into the orifice 160 (decompression device).

Here, the second control unit 171 may be connected to the seawater shut-off valve 161 and the bypass valve 162 by wire or wirelessly to adjust the opening degree of each of the valves 161 and 162.

The second control unit 171, when switching the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3), closes the seawater shutoff valve 161 and opens the bypass valve 162 to open the orifice 160 ) By controlling the seawater to be supplied, the heat source heat exchanger 110 may receive the seawater decompressed by the orifice 160.

The non-stop switching valve (B8) is provided on the circulation connection line, and when the seawater is switched to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, the seawater supply device (100b) is in an open loop driving method. When switching to the closed loop driving method, it should be implemented as non-stop.

Specifically, the non-stop switching valve (B8) is provided on the circulation connection line (L3) located below the sea level, for example, may be provided on the circulation connection line (L3) located approximately 5m below the sea level. .

As a result, the non-stop switching valve (B8) is located approximately 5m below sea level, and at the same time, the point where the circulation connection line (L3) diverges from the upstream of the seawater discharge valve (B2) on the seawater discharge line (L2). By being located at a position lower than about 5m, seawater is filled on the circulation connection line L3, and there is no packing fluid remaining on the circulation connection line L3.

That is, the non-stop switching valve (B8), even when the seawater supply device (100b) is an open loop driving method, is completely filled with seawater without the packing fluid remaining in the circulation connection line (L3), so that the seawater supply device (100b) ), there is no residual packing fluid that prevents non-stop switching from the open-loop driving method to the closed-loop driving method, so that the conversion can be performed non-stop.

As described above, in the embodiment of the present invention, even in the open loop driving method, all of the packing fluid remaining in the circulation connection line (L3) is filled with seawater, so that the seawater supply device 100b is closed loop in the open loop driving method. The conversion to the driving method can be made non-stop, and thus, there is an effect that the supply and demand of the regasified liquefied gas to the consumer 60 is smoothly performed.

4 is a conceptual diagram of a seawater supply apparatus according to a third embodiment of the present invention.

As shown in Figure 4, the seawater supply device 100c includes a heat source heat exchanger 110, a heater 120, a pressure maintenance device 130, a seawater pump 140, a ballast pump 141, and a third control unit ( 172).

Here, the heat source heat exchanger 110, the heater 120, the pressure maintaining device 130 and the seawater pump 140 are as described in the seawater supply devices 100a and 100b according to the first and second embodiments of the present invention. It's the same, so let's replace it.

Prior to describing the individual configurations of the seawater supply apparatus 100c according to the embodiment of the present invention, basic flow paths organically connecting the individual components will be described. Here, the flow path may be a line through which a fluid flows, and is not limited thereto, and any configuration in which a fluid flows is possible.

In an embodiment of the present invention, a seawater supply line (L1), a seawater discharge line (L2), a circulation connection line (L3), a pressure maintaining device connection line (L4), and a fluid supply line (L5) may be further included. Valves (not shown) capable of adjusting the opening degree may be installed in each line, and the supply amount of seawater or fluid may be controlled according to the adjustment of the opening degree of each valve.

Here, the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the pressure maintenance device connection line (L4) are the seawater supply devices 100a and 100b according to the first and second embodiments of the present invention. It is the same as described in ), so it should be replaced.

The fluid supply line (L5) connects the upstream of the seawater inlet (SW1) and the non-stop switching valve (B8) on the circulation connection line (L3), and has a ballast pump 141 and a fluid supply valve (B9), and provides seawater. When the device 100b is driven in a closed loop drive method, ballast water supplied through the ballast pump 141 is supplied to the circulation connection line L3 so that seawater flows on the circulation connection line L3, The packing fluid remaining on the circulation connection line L3 can be removed.

Specifically, the fluid supply line (L5) is connected between the non-stop switching valve (B8) and the circulation valve (B3) on the seawater inlet (SW1) and the circulation connection line (L3), and seawater in the seawater discharge line (L2). When switching to flow through the circulation connection line L3, the fluid is supplied on the circulation connection line L3.

Here, a point at which the fluid supply line L5 is connected upstream of the non-stop switching valve B8 on the circulation connection line L3 may be located at a position approximately 5m lower from the sea level.

Hereinafter, individual components that are organically formed by the above-described lines L1 to L5 to implement the seawater supply device 100c will be described.

The ballast pump 141 is provided on the fluid supply line L5 and may supply fluid to the circulation connection line L3.

Specifically, the ballast pump 141 is provided between the seawater inlet SW1 on the fluid supply line L5 and the fluid supply valve B9, and controls the balance of the hull H (ballast water; Ballast When water is supplied to an arbitrary ballast reservoir (not shown) in the hull H and at the same time, seawater is switched to flow from the seawater discharge line L2 to the circulation connection line L3, that is, the seawater supply device 100c When) is driven in the closed loop driving mode, a fluid for removing packing fluid remaining on the circulation connection line L3 may be supplied to the circulation connection line L3.

Here, the ballast pump 141 may be of a centrifugal type.

The third control unit 172 adjusts the opening degree of the seawater supply valve B1, the seawater discharge valve B2, the circulation valve B3, the non-stop switching valve B8, and the fluid supply valve B9, and the ballast pump ( 141) operation is controlled so that seawater flows from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100c) is switched from the open-loop driving method to the closed-loop driving method. It can be controlled to be implemented as (Non-Stop).

Here, the third control unit 172 includes a seawater supply valve (B1), a seawater discharge valve (B2), a circulation valve (B3), a non-stop switching valve (B8), a fluid supply valve (B9), and a ballast pump 141. Alternatively, it can be connected wirelessly to adjust the opening degree of each of the valves B1 to B3, B8, and B9.

The third control unit 172, when switching the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100c) is switched from the open loop driving method to the closed loop driving method, The opening of the fluid supply valve B9 is opened and the ballast pump 141 is operated to control the supply of ballast water to the circulation connection line L3.

Specifically, the third control unit 172, when the seawater supply device 100c is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 remain open. The non-stop switching valve (B8) and circulation valve (B3) are controlled to maintain the closed state, the fluid supply valve (B9) is switched from the closed state to the open state, and the ballast pump 141 is operated. Can be controlled.

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1), and is discharged to the seawater outlet (SW2) through the seawater discharge line (L2), and at the same time, the ballast pump 141 to the fluid supply line (L5). Through the ballast water flows into the circulation connection line L3 and fills the inside of the circulation connection line L3. The packing fluid remaining therein may be pushed by the ballast water and removed through the air removal valve 151. The air removal valve 151 may be provided on the circulation connection line L3.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100c can be continuously switched from the open loop driving method to the closed loop driving method.

The third control unit 172 maintains the fluid supply valve B9 in an open state until the circulation connection line L3 is full of seawater, and at the moment when the circulation connection line L3 is full of seawater, the seawater supply The valve (B1), the seawater discharge valve (B2), and the fluid supply valve (B9) are closed, the ballast pump 141 is stopped, and the circulation valve (B3) and the non-stop switching valve (B8) are controlled to open. I can.

At this time, seawater is supplied from the seawater pump 140, passes through the seawater supply line L1, flows into the circulation connection line L3 through the seawater discharge line L2, and the seawater flows into the circulation connection line L3 again It is supplied to the seawater supply line (L1) to circulate seawater in a closed loop. That is, seawater is continuously circulated to the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

In addition, in the embodiment of the present invention, by supplying the fluid inside the pressure maintaining device 130 to the circulation connection line L3, the seawater supply device 100c is circulated when switching from the open loop driving method to the closed loop driving method. The packing fluid remaining in the line L3 can be removed.

Specifically, the third control unit 172 adjusts the opening degree of the seawater supply valve (B1), the seawater discharge valve (B2), the circulation valve (B3), the non-stop switching valve (B8), and the pressure maintaining device supply valve (B4). Thus, when the seawater is switched to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100c) is switched from the open-loop driving method to the closed-loop driving method, it is non-stop. It can be controlled to be implemented.

Here, the third control unit 172 is connected to the seawater supply valve (B1), the seawater discharge valve (B2), the circulation valve (B3), the non-stop switching valve (B8), and the pressure maintaining device supply valve (B4) by wire or wirelessly. As a result, the opening degree of each of the valves B1 to B4 and B8 can be adjusted.

The third control unit 172, when switching the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100c) is switched from the open loop driving method to the closed loop driving method, By opening the opening of the pressure maintaining device supply valve B4, it is possible to control the fluid stored in the pressure maintaining device 130 to be supplied to the circulation connection line L3.

Specifically, the third control unit 172, when the seawater supply device 100c is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 remain open. In addition, the non-stop switching valve B8 and the circulation valve B3 are controlled to maintain a closed state, and the pressure maintaining device supply valve B4 can be controlled to switch from a closed state to an open state.

At this time, seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1), and is discharged to the seawater outlet (SW2) through the seawater discharge line (L2), and at the same time, the pressure maintenance device through the pressure maintenance device connection line (L4). (130) The fluid stored therein is introduced into the circulation connection line L3 to fill the inside of the circulation connection line L3. The packing fluid remaining therein may be pushed by the fluid and removed through the air removal valve 151. The air removal valve 151 may be provided on the circulation connection line L3, where the fluid may be seawater.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100c can be continuously switched from the open loop driving method to the closed loop driving method.

The third control unit 172 maintains the pressure maintaining device supply valve B4 in an open state until the circulation connection line L3 is filled with seawater, and at the moment when the circulation connection line L3 is filled with seawater, The pressure seawater supply valve B1 and the seawater discharge valve B2 may be closed, and the circulation valve B3 and the non-stop switching valve B8 may be opened. The pressure maintaining device supply valve (B4) remains open even when the circulation connection line (L3) is filled with seawater, so that the seawater supply device (100c) flows on the circulation connection line (L3) even in the closed loop drive mode. You can make sure that the pressure of the seawater is maintained.

Here, the pressure maintaining device 130 may be connected to a fire extinguishing water storage tank (not shown) for storing fire extinguishing water to extinguish a fire, and the sea water supply device 100c is driven in a closed loop in an open loop driving method. Fire extinguishing water can be supplied from the fire extinguishing water storage tank for fire suppression during the conversion to the method.

At this time, seawater is supplied from the seawater pump 140, passes through the seawater supply line L1, flows into the circulation connection line L3 through the seawater discharge line L2, and the seawater flows into the circulation connection line L3 again It is supplied to the seawater supply line (L1) to circulate seawater in a closed loop. That is, seawater is continuously circulated to the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

As described above, in the embodiment of the present invention, when the seawater supply device 100c is switched from the open loop driving method to the closed loop driving method, the packing fluid remaining in the circulation connection line L3, that is, air can be stably removed. , There is an effect that the conversion of the driving method can be made non-stop, and thus the supply and demand of the regasified liquefied gas to the consumer 60 is smoothly performed.

5 is a conceptual diagram of a seawater supply device according to a fourth embodiment of the present invention.

As shown in Figure 5, the seawater supply device 100d includes a heat source heat exchanger 110, a heater 120, a pressure maintaining device 130a, 130b, 130c, a seawater pump 140, and a fourth control unit 173. Includes.

Here, the heat source heat exchanger 110, the heater 120, and the seawater pump 140 are the same as those described in the seawater supply devices 100a, 100b, and 100c according to the first to third embodiments of the present invention. do.

Prior to describing the individual configurations of the seawater supply apparatus 100d according to the embodiment of the present invention, basic flow paths organically connecting the individual components will be described. Here, the flow path may be a line through which a fluid flows, and is not limited thereto, and any configuration in which a fluid flows is possible.

In an embodiment of the present invention, a seawater supply line (L1), a seawater discharge line (L2), a circulation connection line (L3), a pressure holding device first connection line (L4a), a pressure holding device second connection line (L4b), The pressure maintaining device may further include a third connection line L4c, a first branch line L6, and a second branch line L7. Valves (not shown) capable of adjusting the opening degree may be installed in each line, and the supply amount of seawater or fluid may be controlled according to the adjustment of the opening degree of each valve.

Here, the seawater supply line (L1) and the seawater discharge line (L2) are the same as those described in the seawater supply devices (100a, 100b, 100c) according to the first to third embodiments of the present invention. The first connection line L4a is the same as the pressure maintenance device connection line L4 described in the seawater supply apparatuses 100a, 100b, and 100c according to the first to third embodiments of the present invention, so it will be replaced.

The pressure maintaining device second connection line (L4b) is connected between the pressure maintaining device (130b) and the heater 120 on the seawater supply line (L1) and the heat source heat exchanger (110), and the seawater supply device (100d) is closed. When driven by the loop driving method, seawater stored in the pressure maintaining device 130b may be supplied to the circulation connection line L3. Here, the pressure holding device second connection line (L4b) may be connected to the seawater supply line (L1) at a position above the sea level and approximately 30 m above the sea level, and a pressure maintaining device second supply valve (B4b) is provided. can do.

The pressure maintaining device third connection line (L4c) connects a line at a position higher than the sea level among the pressure maintaining device 130c and the non-stop switching valve (B8) and the circulation valve (B3) on the circulation connection line (L3), When the seawater supply device 100d is driven in a closed loop driving method, the seawater stored in the pressure maintaining device 130c may be supplied to the circulation connection line L3. Here, the pressure maintaining device third connection line (L4a) may be connected to the circulation connection line (L3) at a position above sea level and approximately 20 m above sea level, and a pressure maintaining device third supply valve (B4c) is provided. can do.

In the embodiment of the present invention, the circulation connection line (L3) is the same as described in the seawater supply apparatuses 100a, 100b, and 100c according to the first to third embodiments of the present invention. However, when the seawater is switched to flow from the seawater discharge line (L2) to the circulation connection line (L30), the circulation connection line (L3) is the seawater that flows on the seawater discharge line (L1) or the seawater discharge line (L2). There is a slight difference in that it is supplied and can remove the packing fluid remaining inside.

This will be described in detail in the first and second branch lines L6 and L7 and the fourth control unit 173 below.

The first branch line (L6) is branched between the heater 120 on the seawater supply line (L1) and the heat source heat exchanger (110) and connected to the circulation connection line (L3), so that the seawater supply device (100d) is open loop When switching from the driving method to the closed loop driving method, at least a portion of the seawater flowing on the seawater supply line L1 may be supplied to the circulation connection line L3. Here, the first branch line L6 may include a first branch valve B10 and may be connected to a circulation connection line L3 provided at a position higher than sea level.

The second branch line (L7) is branched between the heat source heat exchanger 110 on the seawater discharge line (L2) and the point where the circulation connection line (L3) is branched on the seawater discharge line (L2), and the circulation connection line (L3) When the seawater supply device 100d is switched from the open loop driving method to the closed loop driving method, at least a part of the seawater flowing on the seawater supply line L1 may be supplied to the circulation connection line L3. Here, the second branch line L7 may include a second branch valve B11 and may be connected to a circulation connection line L3 provided at a position higher than sea level.

Hereinafter, individual components that are organically formed by the above-described lines L1 to L4, L6, and L7 to implement the seawater supply device 100d will be described.

The pressure maintaining device 130a is provided in a line provided at a position lower than the sea level among the non-stop switching valve B8 on the circulation connection line L3 and the circulation valve B3 through the first connection line L4a of the pressure maintaining device. It can be connected, and when the seawater supply device 100d is driven by a closed loop driving method, the pressure holding device first supply valve B4a is opened to reduce the amount of seawater flowing on the circulation connection line L3 with the fluid stored therein. Can hold pressure.

At this time, the pressure maintaining device 130a is configured as a container positioned approximately 35m higher from the sea level and opened so that the upper side communicates with the atmosphere, and can maintain the pressure of the seawater using atmospheric pressure.

That is, in the embodiment of the present invention, the pressure maintaining device 130a located approximately 35m higher from the sea level is connected to the circulation connection line L3 located approximately 5m lower from the sea level, so that the pressure maintaining device 130a is (Approximately 40m; 4bar) can be used to compensate for the pressure of seawater flowing into the seawater pump 140, through which the circulation connection line (L3), the seawater supply line (L1), and the seawater discharge line (L2) It can keep the pressure of circulating seawater constant.

The pressure maintaining device 130b may be connected between the heater 120 on the seawater supply line L1 and the heat source heat exchanger 110 through a pressure maintaining device second connection line L4b, and the seawater supply device 100d When is driven by the closed loop driving method, the pressure of the seawater flowing on the seawater supply line L1 can be maintained with the fluid stored therein by opening the second supply valve B4b of the pressure maintaining device.

At this time, the pressure maintaining device 130b is configured as a container positioned approximately 35m higher from the sea level and opened so that the upper side communicates with the atmosphere, so that the pressure of the seawater can be maintained using atmospheric pressure, and the pressure maintaining device second connection line The seawater supply line L1 connected to the (L4b) may be located approximately 30m higher from the sea level.

That is, in the embodiment of the present invention, the pressure maintaining device 130b located approximately 35m higher from the sea level is connected to the seawater supply line L1 located approximately 30m higher from the sea level, so that the pressure maintaining device 130b is (Approximately 5m; 0.5bar) can be used to compensate for the pressure of seawater flowing into the heat source heat exchanger 110, through which the circulation connection line (L3), the seawater supply line (L1), and the seawater discharge line (L2) The pressure of seawater circulating in the bed can be kept constant.

Therefore, in this case, the length of the pressure holding device first connection line (L4a) is considerably reduced compared to the length of the first connection line (L4a) has the advantage of reducing the construction cost.

The pressure maintaining device 130c is provided at a position higher than the sea level among the heat source heat exchanger 110 on the seawater discharge line L2 and the non-stop switching valve B8 and the circulation valve B3 on the circulation connection line L3. It can be connected between the lines through the third connection line (L4c) of the pressure holding device, and when the seawater supply device (100d) is driven by a closed loop driving method, the third supply valve (B4c) of the pressure holding device is opened to The stored fluid can maintain the pressure of seawater flowing on the circulation connection line L3.

At this time, the pressure maintaining device (130c) is located approximately 35m higher from the sea level and is composed of an open container so that the upper side communicates with the atmosphere, so that the pressure of the seawater can be maintained using atmospheric pressure, and the pressure maintaining device third connection line The circulation connection line L3 connected to the (L4c) may be located approximately 20m higher from the sea level.

That is, in the embodiment of the present invention, the pressure maintaining device 130c located approximately 35m higher from the sea level is connected to the circulation connection line L3 located approximately 20m higher from the sea level, so that the pressure maintaining device 130c is (Approximately 15m; 1.5bar) can be used to compensate for the pressure of seawater flowing into the seawater pump 140, through which the circulation connection line (L3), the seawater supply line (L1), and the seawater discharge line (L2) The pressure of seawater circulating in the water can be kept constant.

Therefore, in this case, the length of the pressure holding device first connection line (L4a) is significantly reduced compared to the length of the first connection line (L4a), thereby reducing the construction cost.

The fourth control unit 173 includes a seawater supply valve (B1), a seawater discharge valve (B2), a circulation valve (B3), a non-stop switching valve (B8), a first branch valve (B10), and a second branch valve (B11). When the seawater is changed to flow from the seawater discharge line (L2) to the circulation connection line (L3) by adjusting the opening degree, that is, when the seawater supply device (100d) is switched from the open-loop driving method to the closed-loop driving method, Non-stop -Stop) can be controlled to be implemented.

Here, the fourth control unit 173 includes a seawater supply valve (B1), a seawater discharge valve (B2), a circulation valve (B3), a non-stop switching valve (B8), a first branch valve (B10), and a second branch valve (B11). ) Is connected to each other by wire or wireless, so that the opening degree of each of the valves B1 to B3, B8, B10, and B11 can be adjusted.

When the seawater supply device 100d is switched from the open-loop driving method to the closed-loop driving method, the fourth control unit 173 is provided with a seawater supply valve without control of the first branch valve B10 and the second branch valve B11. B1), seawater discharge valve (B2), circulation valve (B3), non-stop switching valve (B8) can be controlled.

That is, when the seawater supply device 100d switches from the open-loop driving method to the closed-loop driving method, the fourth control unit 173 opens the circulation valve B3 to at least one of the seawater discharged to the seawater discharge line L2. It can be controlled to supply a part to the circulation connection line (L3).

Specifically, the fourth control unit 173, that is, when the seawater supply device 100d is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 are in an open state. And the non-stop switching valve B8 is controlled to maintain the closed state, and the circulation valve B3 can be controlled to be switched from the closed state to the open state.

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1) and is discharged to the seawater discharge port (SW2) through the seawater discharge line (L2), and at the same time, at least part of the seawater passing through the seawater discharge line (L2). Is introduced into the circulation connection line L3 to fill the circulation connection line L3 with seawater, and the packing fluid remaining on the circulation connection line L3 may be removed through the air removal valve 151.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100d can be continuously switched from the open loop driving method to the closed loop driving method.

The fourth control unit 173 maintains the circulation valve B3 in an open state at the moment when seawater is filled in the circulation connection line L3, while the seawater supply valve B1 and the seawater discharge valve B2 are It can be controlled to close and open the non-stop switching valve (B8).

At this time, the seawater is supplied from the seawater pump 140, passes through the seawater supply line (L1), flows into the circulation connection line (L3) through the seawater discharge line (L2), and the seawater introduced into the circulation connection line (L3) is seawater. The seawater is supplied to the supply line L1 and circulates in a closed loop. That is, seawater is continuously circulated to the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

In addition, the fourth control unit 173, when the seawater supply device (100d) is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve (B1), the seawater discharge valve without control of the second branch valve (B11). Only (B2), the first branch valve (B10), and the non-stop switching valve (B8) can be controlled.

That is, the fourth control unit 173 opens the first branch valve B10 when the seawater supply device 100d switches from the open-loop driving method to the closed-loop driving method, so that the heat source heat exchanger in the seawater supply line L1. At least some of the seawater supplied to 110 may be controlled to be supplied to the circulation connection line L3.

Specifically, the fourth control unit 173, that is, when the seawater supply device 100d is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 are in an open state. And the circulation valve B3 and the non-stop switching valve B8 are controlled to maintain the closed state, and the first branch valve B10 may be controlled to be switched from the closed state to the open state.

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1) and is discharged to the seawater discharge port (SW2) through the seawater discharge line (L2), and at the same time, at least part of the seawater passing through the seawater supply line (L1). Is introduced into the circulation connection line L3 to fill the circulation connection line L3 with seawater, and the packing fluid remaining on the circulation connection line L3 may be removed through the air removal valve 151.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100d can be continuously switched from the open loop driving method to the closed loop driving method.

The fourth control unit 173 opens the circulation valve B3 and the non-stop switching valve B8 at the moment when seawater is filled in the circulation connection line L3, and the seawater supply valve B1 and the seawater discharge valve B2 Is closed, and the first branch valve B10 can be controlled to close.

At this time, the seawater is supplied from the seawater pump 140, passes through the seawater supply line (L1), flows into the circulation connection line (L3) through the seawater discharge line (L2), and the seawater introduced into the circulation connection line (L3) is seawater. It is supplied to the supply line L1 and the seawater circulates in a closed loop. That is, seawater is continuously circulated through the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

In addition, the fourth control unit 173, when the seawater supply device (100d) is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve (B1), the seawater discharge valve without control of the first branch valve (B10). Only (B2), the second branch valve (B11), and the non-stop switching valve (B8) can be controlled.

That is, the fourth control unit 173 is discharged to the seawater discharge line L2 by opening the second branch valve B11 when the seawater supply device 100d switches from the open loop driving method to the closed loop driving method. At least some of the seawater may be controlled to be supplied to the circulation connection line L3.

Specifically, the fourth control unit 173, that is, when the seawater supply device 100d is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 are in an open state. And the circulation valve B3 and the non-stop switching valve B8 are controlled to maintain the closed state, and the second branch valve B11 may be controlled to be switched from the closed state to the open state.

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1) and is discharged to the seawater discharge port (SW2) through the seawater discharge line (L2), and at the same time, at least a portion of the seawater passing through the seawater discharge line (L2). Is introduced into the circulation connection line L3 to fill the circulation connection line L3 with seawater, and the packing fluid remaining on the circulation connection line L3 may be removed through the air removal valve 151.

That is, without stopping the operation of the seawater pump 140, the seawater supply device 100d can be continuously switched from the open loop driving method to the closed loop driving method.

The fourth control unit 173 opens the circulation valve B3 and the non-stop switching valve B8 at the moment when seawater is filled in the circulation connection line L3, and the seawater supply valve B1 and the seawater discharge valve B2 Is closed, and the second branch valve B11 can be controlled to close.

At this time, the seawater is supplied from the seawater pump 140, passes through the seawater supply line (L1), flows into the circulation connection line (L3) through the seawater discharge line (L2), and the seawater introduced into the circulation connection line (L3) is seawater. It is supplied to the supply line L1 and the seawater circulates in a closed loop. That is, seawater is continuously circulated through the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

As described above, in the embodiment of the present invention, when the seawater supply device 100d is switched from an open loop driving method to a closed loop driving method, the packing fluid remaining in the circulation connection line L3, that is, air can be stably removed. , There is an effect that the conversion of the driving method can be made non-stop, and thus the supply and demand of the regasified liquefied gas to the consumer 60 is smoothly performed.

6 is a conceptual diagram of a seawater supply device according to a fifth embodiment of the present invention.

6, the seawater supply device 100e includes a heat source heat exchanger 110, a heater 120, a pressure maintenance device 130b, a seawater pump 140, a low pressure pump 142, and a fifth control unit ( 174).

Here, the heat source heat exchanger 110, the heater 120, the pressure maintaining device 130b, and the seawater pump 140 are seawater supply devices 100a, 100b, 100c, 100d according to the first to fourth embodiments of the present invention. It is the same as described in, so it will be replaced.

Before describing the individual configurations of the seawater supply apparatus 100e according to the embodiment of the present invention, basic flow paths organically connecting the individual components will be described. Here, the flow path may be a line through which a fluid flows, and is not limited thereto, and any configuration in which a fluid flows is possible.

In an embodiment of the present invention, a seawater supply line (L1), a seawater discharge line (L2), a circulation connection line (L3), and a pressure maintaining device second connection line (L4b) may be further included. Valves (not shown) capable of adjusting the opening degree may be installed in each line, and the supply amount of seawater or fluid may be controlled according to the adjustment of the opening degree of each valve.

Here, the seawater supply line (L1), the seawater discharge line (L2), and the second connection line (L4b) of the pressure maintaining device are seawater supply devices (100a, 100b, 100c, 100d) according to the first to fourth embodiments of the present invention. It is the same as described in, so it will be replaced.

In the embodiment of the present invention, the circulation connection line (L3) is the same as described in the seawater supply apparatuses 100a, 100b, and 100c according to the first to third embodiments of the present invention. However, there is a slight difference in that the portion of the circulation connection line L3 connected to the seawater supply line L1 is between the seawater pump 140 and the heater 120. This will be described in detail in the low pressure pump 142 and the fifth control unit 174 below.

Hereinafter, individual components that are organically formed by the above-described lines L1 to L4b to implement the seawater supply device 100e will be described.

The low pressure pump 142 is provided on the circulation connection line L3 to pressurize seawater with a pressurization capacity less than the pressurization capacity of the seawater pump 140, and a circulation connection line in the seawater discharge line L2 It is driven only when switching to flow to (L3), and can be supplied after pressing the seawater to a low pressure with the heat source heat exchanger 110.

Specifically, when the low pressure pump 142 is switched so that seawater flows from the seawater discharge line L2 to the circulation connection line L3, that is, the seawater supply device 100e is switched from an open loop driving method to a closed loop driving method, or When driven by the closed loop driving method, the seawater flowing into the circulation connection line L3 through the seawater discharge line L2 is pressurized to a low pressure to form the heat source heat exchanger 110.

That is, in the embodiment of the present invention, when the seawater supply device 100e is driven by an open loop driving method, seawater is pressurized through the seawater pump 140 and supplied to the heat source heat exchanger 110, and is driven by a closed loop driving method. When seawater is pressurized through the low pressure pump 142, it may be supplied to the heat source heat exchanger 110. Here, the low pressure pump 142 may be of a centrifugal type.

In the embodiment of the present invention, the seawater pump 140 does not change the pressure of the seawater discharged even when the seawater supply device 100e switches from the open loop driving method to the closed loop driving method. Therefore, when the seawater flows through the closed loop space, the head of the seawater is removed, so that a lot of pressurization through the seawater pump 140 is not required.

That is, the seawater pump 140 may compensate for the pressure loss due to the internal resistance of devices that use seawater in the closed-loop driving method, for example, the heater 120 or the heat source heat exchanger 110, and the open-loop driving method Since the pressure at is used as it is, excessive pressure is introduced into the heater 120 or the heat exchanger 110 to generate vibration and noise.

To solve this, in the embodiment of the present invention, a low pressure pump 142 is provided separately from the seawater pump 140 so that the seawater pump 140 is used in the open loop driving method, and the low pressure pump 142 in the closed loop driving method. ) To be driven, solving the problem of vibration and noise.

Through this, in the embodiment of the present invention, by providing a low pressure pump 142 driven separately from the seawater pump 140, and supplying seawater of an appropriate pressure to the heat source heat exchanger 110, there is an effect of reducing vibration and noise. .

The fifth control unit 174 controls the opening of the seawater supply valve B1, the seawater discharge valve B2, the circulation valve B3, and the switching valve B12, and the seawater pump 140 and the low pressure pump 142 Control the operation of the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100e) is switched from the open-loop driving method to the closed-loop driving method. -Stop) can be controlled to be implemented.

Here, the fifth control unit 174 includes a seawater supply valve (B1), a seawater discharge valve (B2), a circulation valve (B3), a switching valve (B12), a seawater pump 140, and a low pressure pump 142 and wired or wireless It is connected to each of the valves (B1 ~ B3, B12) to adjust the opening degree and it is possible to control the operation of the pumps (140, 142).

The fifth control unit 174, when switching the seawater to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100e) is switched from the open loop driving method to the closed loop driving method, By opening the opening of the circulation valve B3, it is possible to control to supply at least some of the seawater discharged to the seawater discharge line L2 to the circulation connection line L3.

Specifically, the fifth control unit 174, that is, when the seawater supply device 100e is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 are in an open state. The switching valve B12 is controlled to maintain the closed state, and the circulation valve B3 may be controlled to be switched from the closed state to the open state.

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1) and is discharged to the seawater discharge port (SW2) through the seawater discharge line (L2), and at the same time, at least a portion of the seawater passing through the seawater discharge line (L2). Is introduced into the circulation connection line L3 to fill the circulation connection line L3 with seawater, and the packing fluid remaining on the circulation connection line L3 may be removed through the air removal valve 151.

The fifth control unit 174 keeps the circulation valve B3 open at the moment when the circulation connection line L3 is filled with seawater, while closing the seawater supply valve B1 and the seawater discharge valve B2. And the switching valve (B12) is opened, the seawater pump 140 is stopped and the low pressure pump 142 can be controlled to operate.

At this time, the seawater passes through the seawater supply line (L1) and flows into the circulation connection line (L3) through the seawater discharge line (L2), and the seawater introduced into the circulation connection line (L3) is reduced to a low pressure through the low pressure pump (142). It is pressurized and supplied to the seawater supply line L1, and the seawater circulates in a closed loop. That is, seawater is continuously circulated to the seawater supply line (L1), the seawater discharge line (L2), the circulation connection line (L3), and the seawater supply line (L1).

Through this, in the embodiment of the present invention, by providing a low pressure pump 142 driven separately from the seawater pump 140, and supplying seawater of an appropriate pressure to the heat source heat exchanger 110, there is an effect of reducing vibration and noise. .

7 is a conceptual diagram of a seawater supply apparatus according to a sixth embodiment of the present invention.

As shown in FIG. 7, the seawater supply device 100f includes a heat source heat exchanger 110, a first heater 120a, a second heater 120b, a pressure maintaining device 130, a seawater pump 140, and a It includes 6 control unit 175.

Here, the heat source heat exchanger 110, the pressure maintaining device 130, and the seawater pump 140 are the same as those described in the seawater supply devices 100a to 100e according to the first to fifth embodiments of the present invention. do.

The first heater 120a is provided between the heat source heat exchanger 110 and the seawater pump 140 on the seawater supply line L1, and may be disposed at a position higher than the sea level and approximately 30m from the sea level.

The first heater 120a receives seawater through the seawater supply line L1, heats it, and supplies it to the heat source heat exchanger 110, and can be operated when the seawater supply device 100f is driven by a closed loop driving method. have. That is, when the temperature of the seawater is too low and the heat source heat exchanger 110 cannot transfer a required amount of heat to the intermediate fruit, the temperature of the seawater may be heated.

At this time, the first heater 120a is connected through a steam line STL from a boiler (not shown) to receive a heat source such as steam to heat seawater, but is not limited thereto. It can be a heater. Here, the first heater 120a is connected in series through the second heater 120b and the steam line STL, which will be described later, and may be driven by one heat source, that is, one steam heat source.

The second heater 120b is disposed on the circulation connection line L3 and may be disposed at a position higher than the sea level and approximately 20 m higher than the sea level, and may heat seawater flowing on the circulation connection line L3. I can.

The second heater 120b receives and heats seawater through the seawater discharge line L2 and supplies it to the heat source heat exchanger 110, and can be operated when the seawater supply device 100f is driven by a closed loop driving method. have. That is, when the temperature of the seawater is too low and the heat source heat exchanger 110 cannot transfer a required amount of heat to the intermediate fruit, the temperature of the seawater may be heated.

At this time, the second heater 120b may be connected in series with the first heater 120a through a steam line STL to receive a heat source such as steam to heat seawater, but is not limited thereto. It can be a heater.

That is, the second heater 120b may share a heat source with the first heater 120a, and the heat source of the remaining steam after heating seawater in the first heater 120a is finally extracted from the second heater 120b. As it can be used, it has the effect of maximizing energy efficiency.

The sixth control unit 175 adjusts the opening degree of the seawater supply valve B1, the seawater discharge valve B2, the circulation valve B3, and the non-stop switching valve B8, and controls the operation of the second heater 120b. Therefore, when the seawater is switched to flow from the seawater discharge line (L2) to the circulation connection line (L3), that is, when the seawater supply device (100f) is switched from the open-loop driving method to the closed-loop driving method, the energy can be optimized and used. Can be controlled.

Here, the sixth control unit 175 is connected to the seawater supply valve (B1), the seawater discharge valve (B2), the circulation valve (B3), the non-stop switching valve (B8), and the second heater 120b by wire or wirelessly, respectively. The opening degree of the valves B1 to B3 and B8 of may be adjusted and the operation of the second heater 120b may be controlled.

The sixth control unit 175 switches the seawater to flow from the seawater discharge line L2 to the circulation connection line L3, that is, when the seawater supply device 100f switches from an open loop driving method to a closed loop driving method, By opening the opening of the circulation valve B3, it is possible to control to supply at least some of the seawater discharged to the seawater discharge line L2 to the circulation connection line L3.

Specifically, the sixth control unit 175, that is, when the seawater supply device 100f is switched from the open-loop driving method to the closed-loop driving method, the seawater supply valve B1 and the seawater discharge valve B2 are in an open state. And the non-stop switching valve B8 is controlled to maintain the closed state, and the circulation valve B3 can be controlled to be switched from the closed state to the open state.

At this time, the seawater is supplied from the seawater inlet (SW1), passes through the seawater supply line (L1) and is discharged to the seawater discharge port (SW2) through the seawater discharge line (L2), and at the same time, at least a portion of the seawater passing through the seawater discharge line (L2). Is introduced into the circulation connection line L3 to fill the circulation connection line L3 with seawater, and the packing fluid remaining on the circulation connection line L3 may be removed through the air removal valve 151.

The sixth control unit 175 keeps the circulation valve B3 open at the moment when the circulation connection line L3 is filled with seawater, while closing the seawater supply valve B1 and the seawater discharge valve B2. And the non-stop switching valve (B8) is opened, the temperature of the seawater is measured with the seawater temperature measuring sensor 180, and when the temperature of the seawater is lower than a preset temperature, the second heater 120b may be controlled to be operated.

Here, the seawater temperature measurement sensor 180 may be provided on the circulation connection line L3, and may be connected to the sixth control unit 175 by wire or wirelessly to transmit seawater temperature information to the sixth control unit 175. .

At this time, the seawater passes through the seawater supply line (L1) and flows into the circulation connection line (L3) through the seawater discharge line (L2), and the seawater flowing into the circulation connection line (L3) is supplied back to the seawater supply line (L1). And seawater circulates in a closed loop. That is, seawater is continuously circulated through the seawater supply line (L1), seawater discharge line (L2), circulation connection line (L3), and seawater supply line (L1), and the appropriate temperature is continuously maintained by the heat source heat exchanger (110). Supply can be carried out.

Through this, in the embodiment of the present invention, it is possible to continuously supply a heat source to the heat source heat exchanger 110 regardless of a temperature change of seawater, and in addition to the first heater 120a, the second heater 120b is provided with the first heater 120a. Because seawater is heated while sharing a heat source of, energy can be consumed economically.

The consumer 60 may receive and consume the liquefied gas vaporized by the vaporizer 50. Here, the customer 60 may be supplied with gaseous liquefied gas by vaporizing the liquefied gas, and may be a land terminal installed on land or a marine terminal floating on the sea and installed.

As described above, the ship having the gas regasification system 1 according to the present invention has an effect of maximizing the regasification efficiency of liquefied gas.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, and the present invention is not limited thereto, and within the technical scope of the present invention, by those of ordinary skill in the art. It would be clear that the transformation or improvement is possible.

All simple modifications to changes of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1: ship with gas regasification system 10: liquefied gas storage tank
20: feeding pump 30: recondenser
40: boosting pump 50: carburetor
60: customer 100: seawater supply device
100a~f: seawater supply device 110: heat source heat exchanger
120: heater 120a: first heater
120b: second heater 130: pressure holding device
130a~c: pressure holding device 140: seawater pump
141: ballast pump 142: low pressure pump
151: air removal valve 160: orifice
161: seawater shut-off valve 162: bypass valve
170: first control unit 171: second control unit
172: third control unit 173: fourth control unit
174: fifth control unit 175: sixth control unit
L1: Seawater supply line L2: Seawater discharge line
L3: Circulation connection line L3a: Circulation connection line
L3b: Intermediate tank bypass line L4: Pressure holding device connection line
L4a: pressure holding device first connection line L4b: pressure holding device second connection line
L4c: pressure holding device 3rd connection line L5: fluid supply line
L6: first branch line L7: second branch line
L8: Orifice bypass line B1: Seawater inlet valve
B2: seawater outflow valve B3: circulation valve
B4: pressure holding device supply valve B4a: pressure holding device first supply valve
B4b: Pressure maintaining device 2nd supply valve B4c: Pressure maintaining device 3rd supply valve
B5: Intermediate tank bypass valve B6: Intermediate tank supply valve
B7: Intermediate tank discharge valve B8: Non-stop switching valve
B9: fluid supply valve B10: first branch valve
B11: second branch valve B12: selector valve
SW1: Seawater inlet SW2: Seawater outlet
GWL: Heat source circulation line GWP: Heat source pump
E: engine S: propeller shaft
P: propeller H: hull
RL: Liquefied gas supply line

Claims (18)

In a ship having a gas regasification system including a regasification device for regasifying liquefied gas through seawater supplied by a seawater supply device,
The seawater supply device,
A seawater supply line for supplying the seawater to the regasification device;
A seawater discharge line for discharging the seawater from the regasification device;
A circulation connection line branching from the seawater discharge line and connecting the seawater supply line;
A seawater pump provided on the seawater supply line positioned lower than the sea level to supply the seawater to the regasification device; And
And a first branch line branched upstream of the regasification device on the seawater supply line and connected to the circulation connection line,
The circulation connection line,
When the seawater is switched to flow from the seawater discharge line to the circulation connection line, the seawater flowing onto the seawater supply line or the seawater discharge line is supplied,
The first branch line,
A ship having a gas regasification system, characterized in that supplying at least a part of seawater supplied to the regasification device on the seawater supply line to the circulation connection line. The method of claim 1,
A seawater pump provided on the seawater supply line positioned lower than the sea level to supply the seawater to the regasification device;
A first opening/closing valve disposed closer to a point connected to the seawater supply line on the circulation connection line; And
And a second opening/closing valve disposed closer to a point branching from the seawater discharge line on the circulation connection line,
The second on-off valve,
A ship having a gas regasification system, characterized in that supplying at least a part of seawater discharged to the seawater discharge line onto the circulation connection line. The method of claim 2,
A third opening/closing valve provided upstream of the seawater pump on the seawater supply line;
A fourth opening/closing valve provided downstream of the branch point of the circulation connection line on the seawater discharge line; And
Gas, characterized in that it further comprises a control unit to implement a non-stop (Non-Stop) when switching the seawater to flow from the seawater discharge line to the circulation connection line by adjusting the opening degree of the first to fourth opening and closing valves. Ships with a regasification system. The method of claim 3, wherein the control unit,
When the seawater is switched to flow from the seawater discharge line to the circulation connection line, the second opening/closing valve is opened to control to supply at least part of the seawater discharged to the seawater discharge line to the circulation connection line. A ship having a gas regasification system. The method of claim 4, wherein the control unit,
When the seawater is filled on the circulation connection line, the third and fourth on-off valves are closed and the first on-off valve is controlled to open. delete The method of claim 1,
A first opening/closing valve disposed closer to a point connected to the seawater supply line on the circulation connection line;
A second opening/closing valve disposed closer to a point branching from the seawater discharge line on the circulation connection line;
A third opening/closing valve provided upstream of the seawater pump on the seawater supply line;
A fourth opening/closing valve provided downstream of the branch point of the circulation connection line on the seawater discharge line;
A first branch valve provided on the first branch line;
Further comprising a control unit configured to implement a non-stop when switching the seawater to flow from the seawater discharge line to the circulation connection line by adjusting the opening degrees of the first to fourth opening/closing valves and the first branch valve. A ship having a gas regasification system, characterized in that. The method of claim 7, wherein the control unit,
When the seawater is switched to flow from the seawater discharge line to the circulation connection line, the first branch valve is opened to supply at least some of the seawater supplied to the regasification device on the seawater supply line to the circulation connection line. A ship having a gas regasification system, characterized in that the control to be performed. The method of claim 8, wherein the control unit,
When the seawater is filled on the circulation connection line, the third and fourth opening and closing valves and the first branch valve are closed, and the first and second opening and closing valves are opened. Ships with fire systems. The method of claim 1,
A seawater pump provided on the seawater supply line positioned lower than the sea level to supply the seawater to the regasification device; And
Further comprising a second branch line branched from the downstream of the regasification device on the seawater supply line and connected to the circulation connection line,
The second branch line,
A ship with a gas regasification system, characterized in that supplying at least a part of seawater discharged from the regasification device on the seawater supply line to the circulation connection line. The method of claim 10,
A first opening/closing valve disposed closer to a point connected to the seawater supply line on the circulation connection line;
A second opening/closing valve disposed closer to a point branching from the seawater discharge line on the circulation connection line;
A third opening/closing valve provided upstream of the seawater pump on the seawater supply line;
A fourth opening/closing valve provided downstream of the branch point of the circulation connection line on the seawater discharge line;
A second branch valve provided on the second branch line;
Further comprising a control unit configured to implement a non-stop when switching the seawater to flow from the seawater discharge line to the circulation connection line by adjusting the opening degrees of the first to fourth opening/closing valves and the second branch valves. A ship having a gas regasification system, characterized in that. The method of claim 11, wherein the control unit,
When the seawater is switched to flow from the seawater discharge line to the circulation connection line, the second branch valve is opened to supply at least a portion of seawater discharged from the regasification device on the seawater discharge line to the circulation connection line. A ship having a gas regasification system, characterized in that the control to be performed. The method of claim 12, wherein the control unit,
When the seawater is filled on the circulation connection line, the third and fourth opening and closing valves and the second branch valve are closed, and the first and second opening and closing valves are opened. Ships with fire systems. The method of claim 1,
A vessel having a gas regasification system, further comprising a pressure maintaining device provided on the circulation connection line and maintaining a pressure of seawater flowing through the circulation connection line. The method of claim 14, wherein the pressure holding device,
A ship with a gas regasification system, characterized in that maintaining the pressure of seawater by using atmospheric pressure. The method of claim 1, wherein the regasification device,
Ship with a gas regasification system, characterized in that it comprises a vaporizer for vaporizing the liquefied gas directly into the seawater. The method of claim 1, wherein the regasification device,
A vaporizer for vaporizing the liquefied gas into an intermediate heat medium; And
Ship with a gas regasification system, characterized in that it comprises a heat source heat exchanger for supplying the heat source of the seawater to the intermediate heat medium. The method according to any one of claims 4 or 13,
The first on-off valve is a non-stop switching valve, the second on-off valve is a circulation valve, the third on-off valve is a seawater supply valve, the fourth on-off valve is a seawater discharge valve, and the control unit is Ship with a gas regasification system, characterized in that the fourth control unit.

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