KR102138963B1 - Gas treatment system and ship having the same - Google Patents

Abstract

The present invention relates to a gas treatment system and a ship, a heat exchanger for heating the liquefied gas of the liquefied gas storage tank using a fruit to supply it to the engine provided on the ship; A fruit supply unit having a fruit heater for heating the fruit using cooling water used in the engine, and supplying fruit to the heat exchanger; And a cooling water delivery unit delivering cooling water from the engine to the heating heater, wherein the cooling water transmission unit includes a heat boosting unit that heats cooling water delivered from the engine to the heating heater.

Description

Gas treatment system and ship having the same}

The present invention relates to a gas treatment system and a ship.

A ship is a transportation means for navigating the ocean with a large amount of minerals, crude oil, natural gas, or thousands of containers, and it is made of steel and floats on the water surface by buoyancy. Go through.

These ships generate thrust by driving an engine or a gas turbine, etc. At this time, the engine uses oil fuel such as gasoline or diesel to move the piston so that the crankshaft is rotated by the reciprocating motion of the piston, and a shaft connected to the crankshaft Is rotated so that the propeller is driven, while the gas turbine burns fuel with compressed air and generates power by rotating the turbine blades through the temperature/pressure of the combustion air to transmit power to the propeller.

However, in recent years, LNG carriers that use LNG as fuel in LNG carriers carrying Liquefied Natural Gas, which is a kind of liquefied gas, have been used, and LNG fuel supply methods have been used, and LNG is clean fuel. Since the reserves are also richer than petroleum, the method of using LNG as a fuel for demand is also applied to vessels other than LNG carriers.

However, as compared with the conventional case of using oil fuel such as diesel, there are many problems to be solved in the case of using LNG as a gas fuel, and the technology of supplying LNG to a customer in a ship using clean fuel LNG There is continuous research and development.

The present invention was created to solve the problems of the prior art as described above, and the object of the present invention is to heat a liquefied gas using engine cooling water, and to process gas to enable stable liquefied gas heating regardless of whether the engine is operating or not. It is intended to provide a system and a vessel.

A gas treatment system according to an aspect of the present invention includes a heat exchanger for heating liquefied gas from a liquefied gas storage tank using a fruit to supply it to an engine provided on a ship; A fruit supply unit having a fruit heater for heating the fruit using cooling water used in the engine, and supplying fruit to the heat exchanger; And a cooling water delivery unit delivering cooling water from the engine to the heating heater, wherein the cooling water transmission unit includes a heat boosting unit that heats cooling water delivered from the engine to the heating heater.

Specifically, the heat boosting unit may heat the cooling water when the operation of the engine is equal to or less than a predetermined load or when the operation is stopped.

Specifically, a cooling water circulation unit for cooling the cooling water discharged from the engine and returning it to the engine may be further included.

Specifically, the cooling water circulation unit, a cooling water circulation line for returning the cooling water discharged from the engine to the engine; A cooling water cooler provided on the cooling water circulation line to cool the cooling water; And it is provided in the cooling water circulation line may include a cooling water circulation pump for pumping the cooling water.

Specifically, the cooling water delivery unit, a cooling water delivery line branched from the cooling water circulation line and connected to the cooling water circulation line after passing through the heat medium heater; A coolant booster pump provided on the coolant delivery line to pump coolant; And a cooling water delivery valve provided on the cooling water circulation line or the cooling water delivery line to control the flow of the cooling water delivery line.

Specifically, the cooling water delivery unit, the heater bypass line is provided to cool water in the cooling water delivery line to bypass the heating heater; And it may further include a heater bypass valve for controlling the flow of the heater bypass line.

Specifically, the heat boosting unit may be provided upstream of the heat heater in the cooling water delivery line.

Specifically, during the standby of the engine, the cooling water delivery part adjusts the cooling water delivery valve and the heater bypass valve so that the cooling water of the cooling water circulation part passes through the heater boosting unit to bypass the fruit heater and then returns to the cooling water circulation part. Thus, the cooling water preheater may be omitted from the cooling water circulation unit by preheating the cooling water through the heater boosting unit.

Specifically, when the engine is operated with fuel other than liquefied gas, the cooling water delivery part controls the cooling water delivery valve and the heater bypass valve to bypass the heating medium through the heater boosting unit and coolant of the cooling water circulation part bypasses the fruit heater. It can be returned to the coolant circulation.

Specifically, when the engine is running with liquefied gas, the cooling water delivery unit controls the cooling water delivery valve and the heater bypass valve to cool the circulation portion of the cooling water circulating portion sequentially through the heater boosting unit and the fruit heater, and then to the cooling water circulation portion. Can be returned.

Specifically, the cooling water circulation unit, an auxiliary cooling water circulation line connected from the downstream of the confluence point of the cooling water transmission line to the upstream of the branch point of the cooling water transmission line in the cooling water circulation line; And it may further include an auxiliary cooling water circulation valve for controlling the flow of the auxiliary cooling water circulation line.

Specifically, when the engine is stopped, the cooling water delivery part, by adjusting the cooling water delivery valve and the heater bypass valve, so that the cooling water of the cooling water circulation part passes through the heater boosting unit and the fruit heater in turn and returns to the cooling water circulation part. The cooling water circulation unit may adjust the auxiliary cooling water circulation valve so that cooling water that has passed through the heat medium heater bypasses the engine and returns to the cooling water transmission unit.

Specifically, the cooling water circulation unit further includes a fresh water generator provided upstream of the cooling water cooler in the cooling water circulation line and generating fresh water from sea water using high-temperature cooling water discharged from the engine, when the engine is stopped The coolant circulation unit may adjust the auxiliary coolant circulation valve so that coolant that has passed through the heat boosting unit passes through the fresh water generator and bypasses the engine to be returned to the coolant delivery unit.

A ship according to one aspect of the present invention is characterized by having the gas treatment system.

The gas treatment system and the ship according to the present invention use the engine cooling water to heat the fruit of the liquefied gas, but solve the problem that the cooling water cannot be used to heat the fruit when the engine is not operated. Stability of liquefied gas supply can be ensured.

1 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.
2 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.
3 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.
4 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.
5 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments, which are associated with the accompanying drawings. In addition, it should be noted that, in addition to reference numerals to the components of each drawing in the present specification, the same components have the same numbers as possible, even if they are displayed on different drawings. In addition, in the description of the present invention, when it is determined that detailed descriptions of related known technologies may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the gas processing system of the present invention will be described, and the present invention includes a gas processing system and a ship having the same.

At this time, it is noted that the ship is a general merchant ship that does not restrict ship types such as container ships, in addition to a liquefied gas carrier that loads liquefied gas, or that it is used to cover all marine plants such as FSRU and FLNG.

In addition, the vessel may include bunkering vessels for supplying liquefied gas to other ships or land, etc. in addition to vessels supplied for loading liquefied gas or for use as fuel.

Hereinafter, in the present specification, liquefied gas may be used in a sense to encompass all gas fuels generally stored in a liquid state, such as LNG or LPG, ethylene, and ammonia.

1 to 5 are conceptual diagrams of a gas processing system according to an embodiment of the present invention.

1 is a conceptual diagram shown from a liquefied gas flow perspective, and FIGS. 2 to 5 are conceptual diagrams shown from a cooling water flow perspective.

Also, FIG. 2 shows a case where the engine 50 is operated with fuel (diesel, etc.) other than liquefied gas, FIG. 3 shows a case where the engine 50 is operated with liquefied gas, and FIG. 4 shows that the engine 50 is stopped It shows the case. 5 also shows cooling water preheating using a pre-boosting unit. For reference, FIGS. 2 and 3 may be in operation (at Normal Sea Going condition), and FIGS. 4 and 6 may be in port condition (at Port condition).

1 to 5, the gas treatment system 1 according to an embodiment of the present invention, a liquefied gas storage tank 10, a liquefied gas pump 20, a heat exchanger 30, a fruit supply 40 ), a cooling water circulation unit 60, and a cooling water transmission unit 70.

The liquefied gas storage tank 10 may liquefy gas having a boiling point lower than normal temperature and store it in a cryogenic state. The liquefied gas storage tank 10 may be of a membrane type, a standalone type, a pressure vessel type, etc., but is not particularly limited.

The liquefied gas storage tank 10 may be provided in plural on board the ship when the ship is a liquefied gas carrier, and when the ship is a general merchant ship other than a liquefied gas carrier such as a container ship, it is provided on the upper deck or inside the engine room, One or more may be disposed in various non-limiting locations such as the lower portion of the cabin.

The liquid liquefied gas stored in the liquefied gas storage tank 10 is used as fuel for the engine 50. The engine 50 is provided on the ship and may be a propulsion engine that propels the ship. However, if the ship is an electric propulsion method, the engine 50 may be a power generation engine, and the engine 50 may be a concept including a turbine and the like, not limited in terms.

That is, in the present specification, the engine 50 covers all engines that consume liquefied gas to generate energy such as power. However, in the present specification, the engine 50 may be limitedly interpreted as an engine requiring cooling water.

Of course, the liquefied gas stored in the liquefied gas storage tank 10 may be consumed in other demand sources, such as the gas boiler 51, the power generation engine 51 (when the engine 50 is the propulsion engine), in addition to the engine 50. .

A liquefied gas supply line 12 may be provided from the liquefied gas storage tank 10 to the engine 50, and a transfer pump 11 is provided at one end of the liquefied gas supply line 12. At this time, the transfer pump 11 may be a latent pump submerged inside the liquefied gas storage tank 10, but may be provided inside the liquefied gas storage tank 10.

The liquefied gas pump 20 is provided on the liquefied gas supply line 12 and pressurizes the liquefied gas according to the required pressure of the engine 50. However, when the pressure of the liquefied gas discharged to the liquefied gas supply line 12 by the transfer pump 11 corresponds to the required pressure of the engine 50, the liquefied gas pump 20 may be omitted.

Conversely, when the engine 50 is a high-pressure engine, the liquefied gas pump 20 may pressurize the liquefied gas secondarily by the transfer pump 11, and the liquefied gas pump 20 may use liquefied gas as an example, 200 bar. It may be a high pressure pump that is pressurized above.

The heat exchanger 30 is heated to supply the liquefied gas of the liquefied gas storage tank 10 to the engine 50 provided on the ship. The liquefied gas may be stored in the liquefied gas storage tank 10 in a cryogenic state to maintain a liquid phase, and the temperature of the liquefied gas required by the engine 50 is at least 0 degrees or more (eg, 20 to 40 degrees). Can.

Therefore, the heat exchanger 30 is provided downstream of the liquefied gas pump 20 in the liquefied gas supply line 12, and heats the liquefied gas pressurized to the required pressure of the engine 50 with heat, so that the required temperature of the engine 50 Can be set to

The fruit used by the heat exchanger 30 is not particularly limited, but for convenience, the fruit is described as being glycol water.

The heat exchanger 30 may be of a plate type forming a structure having at least two flow paths, one flow path parallel to the liquefied gas supply line 12 and the other flow path of the fruit supply line 41 of the fruit supply unit 40. ).

Of course, the type of the heat exchanger 30 is not limited to the above, and for example, the heat exchanger 30 may be a PCHE type or the like. That is, the heat exchanger 30 may be made of various structures capable of sufficiently heating the liquefied gas using glycol water.

The fruit supply unit 40 supplies fruit to the heat exchanger 30. The fruit supply unit 40 includes a fruit supply line 41 connected to a flow path of the heat exchanger 30, and a fruit heater 42, a fruit pump 43, and a fruit tank provided on the fruit supply line 41 (44).

The fruit heater 42 heats the fruit. The fruit is cooled while heat-exchanging with liquefied gas in the heat exchanger 30, and the fruit supply unit 40 may heat the cooled fruit and circulate it to the heat exchanger 30.

The heat source used by the fruit heater 42 to heat the fruit may be cooling water used in the engine 50, and the cooling water may be Jacket cooling water or the like. Cooling water may be discharged from the engine 50 in a high temperature state, wherein heat contained in the cooling water may be used for heating the fruit.

The fruit pump 43 conveys fruit. The fruit is discharged in a low temperature state from the heat exchanger 30 and may be transferred to the fruit heater 42 by the fruit pump 43. At this time, a plurality of heat pump 43 may be provided in parallel/serial for reasons such as load reduction and backup.

The fruit tank 44 temporarily stores fruit. The fruit discharged from the heat exchanger 30 may be temporarily stored in the fruit tank 44 and then introduced into the fruit heater 42 through the fruit pump 43. The fruit tank 44 is a fruit pump 43. It is possible to protect the fruit pump 43 by stably maintaining the flow rate of the fruit delivered to the fruit.

In addition, the fruit supply line 41 can be replenished from the outside through the fruit tank 44, and the fruit tank 44 can appropriately adjust the pressure of the fruit flowing along the fruit supply line 41.

The fruit supply unit 40 further includes an auxiliary fruit heater 421. The auxiliary fruit heater 421 may heat the fruit using steam or the like. In the conventional case, only a heater for heating the fruit using steam is provided. In the present embodiment, the fruit heater 42 for heating the fruit as the main using cooling water of the engine 50 is placed, and the fruit is heated with steam. The heater may be set as an auxiliary heat heater 421.

Of course, as described below, the present embodiment can stably heat the fruit using cooling water regardless of the operation of the engine 50, and thus the auxiliary fruit heater 421 may be omitted.

Therefore, this embodiment may be provided with an auxiliary boiler (Aux. Boiler) to use steam, or the installation or control of ancillary equipment such as a pump or fan for operating the auxiliary boiler may be omitted or minimized, and additional increase in power generation load Can be suppressed.

The fruit supply line 41 may be provided with a fruit bypass line 411 capable of bypassing the fruit heater 42 and/or the auxiliary fruit heater 421, and the fruit bypass line 411 may include a portion of fruit. By bypassing the heater 42 and the like, the fruit heater 42 is mixed with the fruit passed upstream of the heat exchanger 30, and thus can be used to control the temperature of the fruit flowing into the heat exchanger 30.

The cooling water circulation unit 60 cools the cooling water discharged from the engine 50 and returns it to the engine 50. The cooling water circulation unit 60 includes a cooling water circulation line 61, a cooling water cooler 62, a cooling water circulation pump 63, and a fresh water generator 64.

The cooling water circulation line 61 may be connected to an inlet end through which cooling water is introduced into the engine 50 from an outlet end from which the cooling water is discharged from the engine 50. That is, the coolant circulation line 61 may form a closed loop in which the coolant circulates with the engine 50 interposed therebetween, and return the coolant discharged from the engine 50 to the engine 50.

The coolant circulation line 61 may be branched/merged with a coolant delivery line 71 to be described later, and an auxiliary coolant circulation line 65 provided in parallel with a part of the coolant circulation line 61 may be provided. The flow of the auxiliary cooling water circulation line 65 is controlled by the auxiliary cooling water circulation valve 651, and the opening degree of the auxiliary cooling water circulation valve 651 may be adjusted for preheating of the cooling water using the heat boosting unit 73.

The cooling water cooler 62 is provided in the cooling water circulation line 61 to cool the cooling water. In this case, the coolant cooler 62 may indirectly cool the coolant through a method of transferring the coolant to the central FW cooler provided in the ship, and the coolant may be cooled by unrestricted refrigerant such as seawater. It can be cooled.

A cooler bypass valve 611 in the form of a three-way valve is provided upstream of the coolant cooler 62 in the coolant circulation line 61 so that at least a portion of the coolant bypasses the coolant cooler 62 to be recovered by the engine 50. Can.

The cooling water circulation pump 63 is provided in the cooling water circulation line 61 and pumps cooling water. A plurality of coolant circulation pumps 63 may be provided in series/parallel, similar to the heat pump 43. The coolant circulation pump 63 may be discharged from the engine 50 to return the coolant passed through the coolant cooler 62 or the like to the engine 50.

The fresh water generator 64 is provided upstream of the coolant cooler 62 in the coolant circulation line 61, and generates fresh water from sea water using high-temperature coolant discharged from the engine 50. The fresh water generator 64 may be separated by distilling the fresh water component by heating the sea water with high heat of the cooling water, leaving only impurities such as salt.

A coolant preheater 66 may be provided in the coolant circulation line 61. When the engine 50 is running, the coolant may be circulated with an appropriate temperature, but when the engine 50 is running, the temperature of the coolant may be lower than the temperature required by the engine 50.

Therefore, the cooling water preheater 66 provided in the cooling water circulation line 61 may heat the cooling water and inject it into the engine 50 before the engine 50 is operated, and the heat source is not particularly limited.

However, in the present embodiment, the cooling water preheater 66 is omitted because the heat boosting unit 73 is provided to heat the cooling water so as to have sufficient heat while heating the fruit for heating the liquefied gas using the cooling water. Can be. This will be described in detail below.

The cooling water delivery unit 70 delivers cooling water from the engine 50 to the heating heater 42. Cooling water is provided to circulate the engine 50, but contains high heat, so this embodiment can utilize heat contained in the cooling water to heat the liquefied gas.

The cooling water delivery unit 70 includes a cooling water delivery line 71, a cooling water booster pump 72, and a heat boosting unit 73.

The cooling water transfer line 71 is branched from the cooling water circulation line 61 and is connected to the cooling water circulation line 61 after passing through the heat medium heater 42. The coolant delivery line 71 may branch from the upstream of the fresh water generator 64 in the coolant circulation line 61, and may be joined to the coolant circulation line 61 again upstream of the fresh water generator 64.

At this time, a cooling water delivery valve 711 may be provided between the branching point and the confluence point of the cooling water delivery line 71 in the cooling water circulation line 61. Cooling water is transferred to the cooling water by the opening/closing control of the cooling water delivery valve 711. ) Can be controlled.

Of course, the cooling water delivery valve 711 may be provided in at least one of various locations such as the cooling water circulation line 61 and/or the cooling water delivery line 71 as a configuration for controlling the flow of the cooling water delivery line 71.

A cooling water boosting pump and a heating heater 42 may be provided in series on the cooling water circulation line 61, and a heat boosting unit 73 may be provided between the cooling water boosting pump and the heating heater 42.

In the cooling water circulation line 61, before and after the heat medium heater 42, a heater bypass line 712 for bypassing the heat medium heater 42 may be provided. The heater bypass line 712 does not require the consumption of the liquefied gas, so that the liquefied gas does not need to be heated in the heat exchanger 30, the cooling water is heated in the case where only the auxiliary heat heater 421 needs to be operated. ). In the heater bypass line 712, a heater bypass valve 713 may be provided to control the flow of cooling water bypassing the heating heater 42.

The cooling water booster pump 72 delivers the cooling water discharged from the engine 50 to the heat medium heater 42. A plurality of coolant booster pumps 72 may be provided in series/parallel, similarly or similarly to the coolant circulation pump 63 and the like.

The heat boosting unit 73 heats the cooling water delivered from the engine 50 to the heat heater 42. Cooling water may be sufficiently hot when discharged from the engine 50, but heating of the fruit using the cooling water may not be possible when the engine 50 is not operated.

That is, when the engine 50 through which the cooling water utilized for heating the heat circulates does not operate, since the cooling water does not have sufficient heat, the aforementioned auxiliary heating heater 421 is inevitably used, which in turn leads to sufficient cooling of the auxiliary boiler. This causes problems such as inconvenience of operating and increased costs.

Therefore, in the present embodiment, the heat boosting unit 73 is placed so that when the operation of the engine 50 is equal to or less than a predetermined load or when the operation is stopped, the cooling water is heated and transferred to the heat transfer heater 42 so that the heat is heated without problems. Can.

To this end, the heat boosting unit 73 is provided upstream of the heat medium heater 42 in the cooling water delivery line 71 and can heat the cooling water using steam. In this case, in the present embodiment, during normal operation of the engine 50, the fruit is heated using high-temperature cooling water so that the liquefied gas can reach the required temperature of the engine 50, but the engine 50 is operated By using the heat boosting unit 73 only when not, etc., it is possible to minimize the use of steam to heat the fruit.

In addition, by placing the heat boosting unit 73, regardless of the operating load of the engine 50, the coolant can be set to a predetermined temperature or more, and the fresh water generator 64 can always exhibit the maximum capacity. Therefore, this embodiment can alleviate the constraints on the capacity and operating conditions of the fresh water generator 64.

Hereinafter, with reference to FIGS. 2 to 5, the flow of the coolant in the present invention, which varies depending on the operating state of the engine 50, will be described in detail.

Referring first to FIG. 2, when the engine 50 is operated with fuel (diesel, etc.) other than liquefied gas, cooling water may be circulated by the cooling water circulation unit 60. In addition, since the capacity of the fresh water generator 64 fluctuates unnecessarily when the cooling water temperature changes as the operating load of the engine 50 changes, at least a part of the cooling water is transferred to the cooling water delivery unit 70 to solve this, and heat boosting is performed. After being heated by the unit 73 it can be introduced into the fresh water generator 64.

At this time, the cooling water delivery unit 70 controls the cooling water delivery valve 711 and the heater bypass valve 713, so that the cooling water of the cooling water circulation unit 60 bypasses the heat heater 42 through the heat boosting unit 73. After that, it may be returned to the coolant circulation unit 60.

On the other hand, referring to Figure 3, when the engine 50 is operating with liquefied gas, the cooling water is discharged from the engine 50 may be recovered to the engine 50 via the cooling water delivery unit 70.

At this time, the cooling water delivery unit 70, after adjusting the cooling water delivery valve 711 and the heater bypass valve 713, the cooling water of the cooling water circulation unit 60 passes through the heat boosting unit 73 and the heating heater 42 in turn. It is to be returned to the coolant circulation unit 60.

The heat boosting unit 73 may check the heating temperature of the cooling water. For example, the heat boosting unit 73 is provided on the flow of cooling water that is joined to the cooling water circulation line 61 through the cooling water delivery line 71. By receiving the temperature of the cooling water from the temperature sensor 714, the opening degree of the steam valve 731 for controlling the flow rate of the steam supplied to the heat boosting unit 73 can be adjusted.

Of course, the manner in which the heat boosting unit 73 properly controls the temperature of the cooling water is not limited to the above. However, in the present exemplary embodiment, the temperature of the cooling water delivered to the fruit heater 42 or the fresh water generator 64 may be kept constant regardless of the load of the engine 50 using the heat boosting unit 73.

Therefore, in the case where the engine 50 is operated with fuel other than liquefied gas or operated with liquefied gas, the present embodiment can maximize the capacity of fresh water generation or allow the fruit to be properly heated to the desired temperature in the fruit heater 42. .

Referring to FIG. 4, when the engine 50 is stopped, the coolant circulation unit 60 may not circulate the coolant to the engine 50. However, in addition to the engine 50, when other demand sources (eg, the power generation engine 51, the gas boiler 51, etc.) that consume the liquefied gas heated in the heat exchanger 30 are in operation, high temperature for heating the liquefied gas Need coolant.

Therefore, in this case, the cooling water delivery unit 70 controls the cooling water delivery valve 711 and the heater bypass valve 713 to sequentially cool the heat of the cooling water circulation unit 60 and the heat boosting unit 73 and the heating heater 42. After being rough, it is returned to the coolant circulation part 60. The operation of the coolant delivery unit 70 is the same/similar to that of FIG. 3 in which the engine 50 operates with liquefied gas.

However, unlike FIG. 3, the cooling water circulation unit 60 controls the auxiliary cooling water circulation valve 651 so that the cooling water that has passed through the heat medium heater 42 bypasses the engine 50 and returns to the cooling water transmission unit 70. The aforementioned auxiliary cooling water circulation line 65 is upstream of the branch point of the cooling water delivery line 71 from downstream of the confluence point of the cooling water delivery line 71 in the cooling water circulation line 61 (for example, downstream of the fresh water generator 64). When the auxiliary cooling water circulation valve 651 permits the flow of the auxiliary cooling water circulation line 65, the cooling water is heated in the heat boosting unit 73 and used to heat the fruit in the heat heater 42. Thereafter, even if it flows into the coolant circulation unit 60, it may not be introduced into the engine 50 but may be circulated back to the coolant transmission unit 70.

In this case, since the cooling water is heated by the heat boosting unit 73, the fruit can also be heated without a problem, so that even if the engine 50 is not operated, it is possible to ensure that there is no obstacle in the operation of the customer such as the gas boiler 51. .

Alternatively, in the present embodiment, when the engine 50 is stopped, the cooling water circulation unit 60 controls the auxiliary cooling water circulation valve 651 to cool the engine passing through the heat boosting unit 73 after passing through the fresh water generator 64, and then the engine 50 By bypassing) to be returned to the cooling water delivery unit 70, the operation of the fresh water generator 64 may be possible even if the engine 50 is not operated.

Referring to FIG. 5, when the engine 50 is in standby (when the engine 50 waits for operation), the coolant needs to be heated by the coolant preheater 66 and introduced into the engine 50. However, in the present embodiment, the cooling water delivery unit 70 controls the cooling water delivery valve 711 and the heater bypass valve 713, so that the cooling water of the cooling water circulation unit 60 passes through the heat boosting unit 73 to heat the fruit heater 42. After bypassing, it is returned to the cooling water circulation unit 60.

In this case, since the coolant is preheated through the heat boosting unit 73 and the coolant bypass valve 611 bypasses the coolant cooler 62 and flows into the engine 50, the coolant circulating unit 60 is free of coolant. The heater 66 can be omitted. Of course, it is also possible to guarantee the operation of the fresh water generator 64.

As described above, the present embodiment is provided with a heat boosting unit 73 capable of stably supplying heat to the heat exchanger 30 using cooling water used in the engine 50 regardless of the load of the engine 50. , It is possible to always operate the supply of liquefied gas regardless of the load fluctuation of the engine 50, it is possible to minimize the frequency of operation of the auxiliary boiler to generate steam and to minimize the increase factor of the power generation load. In addition, this embodiment can be expected to maximize the overall system efficiency by replacing the roles of existing equipment or assisting in the operation of other equipment.

In addition to the above-described embodiments, the present invention encompasses all of the embodiments that occur by a combination of the above embodiments and known techniques.

Although the present invention has been described in detail through specific examples, the present invention is specifically for describing the present invention, and the present invention is not limited to this, and by those skilled in the art within the technical spirit of the present invention. It will be apparent that the modification and improvement are possible.

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

1: Gas treatment system 10: Liquefied gas storage tank
11: Transfer pump 12: Liquefied gas supply line
20: liquefied gas pump 30: heat exchanger
40: fruit supply unit 41: fruit supply line
411: Fruit bypass line 42: Fruit heater
421: auxiliary heat heater 43: heat pump
44: fruit tank 50: engine
51: power generation engine, gas boiler 60: cooling water circulation
61: coolant circulation line 611: cooler bypass valve
62: coolant cooler 63: coolant circulation pump
64: fresh water generator 65: auxiliary cooling water circulation line
651: auxiliary coolant circulation valve 66: coolant preheater
70: cooling water transmission unit 71: cooling water delivery line
711: Cooling water transfer valve 712: heater bypass line
713: heater bypass valve 714: temperature sensor
72: coolant booster pump 73: heat boosting unit
731: steam valve

Claims (14)

A heat exchanger for heating liquefied gas from the liquefied gas storage tank using a fruit to supply it to an engine provided on a ship;
A fruit supply unit having a fruit heater for heating the fruit using cooling water used in the engine, and supplying fruit to the heat exchanger;
A cooling water circulation unit that cools the cooling water discharged from the engine and returns it to the engine; And
It includes a cooling water delivery unit for delivering cooling water from the engine to the heating medium heater,
The cooling water circulation unit,
A cooling water circulation line for returning the cooling water discharged from the engine to the engine,
The cooling water delivery unit,
A heat boosting unit that heats the cooling water delivered from the engine to the fruit heater;
A cooling water transfer line branched from the cooling water circulation line and connected to the cooling water circulation line after passing through the heat medium heater;
A heater bypass line in which cooling water is provided in the cooling water delivery line to bypass the heating heater; And
And a heater bypass valve for controlling the flow of the heater bypass line. According to claim 1, The heat boosting unit,
A gas processing system, characterized in that the cooling water is heated when the engine is operated below a predetermined load or when the engine is stopped. delete According to claim 1, wherein the cooling water circulation unit,
A cooling water cooler provided on the cooling water circulation line to cool the cooling water; And
A gas treatment system provided on the cooling water circulation line and comprising a cooling water circulation pump for pumping cooling water. According to claim 4, The cooling water delivery unit,
A coolant booster pump provided on the coolant delivery line to pump coolant; And
And a cooling water delivery valve provided on the cooling water circulation line or the cooling water delivery line to control the flow of the cooling water delivery line. delete The method of claim 5, wherein the heat boosting unit,
Gas treatment system characterized in that provided in the cooling water delivery line upstream of the heating medium. According to claim 5, In the standby of the engine, the cooling water transmission unit,
By adjusting the cooling water delivery valve and the heater bypass valve, the cooling water of the cooling water circulation unit bypasses the heat heater through the heat boosting unit and is returned to the cooling water circulation unit, thereby preheating the cooling water through the heat boosting unit. Gas treatment system characterized in that the cooling water preheater is omitted from the cooling water circulation section. According to claim 5, When the engine is running with fuel other than liquefied gas, the cooling water delivery unit,
And adjusting the cooling water transfer valve and the heater bypass valve so that the cooling water of the cooling water circulation unit passes through the heat boosting unit to bypass the heat heater and then returns to the cooling water circulation unit. According to claim 5, When the engine is running with liquefied gas, the cooling water delivery unit,
Gas control system, characterized in that by adjusting the cooling water delivery valve and the heater bypass valve, the cooling water of the cooling water circulation unit passes through the heat boosting unit and the heating heater in turn and then returns to the cooling water circulation unit. A heat exchanger for heating liquefied gas from the liquefied gas storage tank using a fruit to supply it to an engine provided on a ship;
A fruit supply unit having a fruit heater for heating the fruit using cooling water used in the engine, and supplying fruit to the heat exchanger;
A cooling water circulation unit that cools the cooling water discharged from the engine and returns it to the engine; And
It includes a cooling water delivery unit for delivering cooling water from the engine to the heating medium heater,
The cooling water circulation unit,
A cooling water circulation line for returning the cooling water discharged from the engine to the engine,
The cooling water delivery unit,
A heat boosting unit that heats the cooling water delivered from the engine to the fruit heater; And
And a cooling water transfer line branched from the cooling water circulation line and connected to the cooling water circulation line after passing through the heat medium heater,
The cooling water circulation unit,
An auxiliary cooling water circulation line connected from the downstream of the confluence point of the cooling water delivery line to the upstream of the branch point of the cooling water delivery line in the cooling water circulation line to allow cooling water to bypass the engine; And
And an auxiliary cooling water circulation valve for controlling the flow of the auxiliary cooling water circulation line. The method of claim 11, wherein the cooling water delivery unit,
A cooling water delivery valve provided on the cooling water circulation line or the cooling water delivery line to control the flow of the cooling water delivery line;
A heater bypass line in which cooling water is provided in the cooling water delivery line to bypass the heating heater; And
Further comprising a heater bypass valve for controlling the flow of the heater bypass line,
When the engine is stopped,
The cooling water delivery unit, by adjusting the cooling water delivery valve and the heater bypass valve, so that the cooling water of the cooling water circulation unit passes through the heat boosting unit and the fruit heater in turn and is returned to the cooling water circulation unit,
The cooling water circulation unit, the gas processing system, characterized in that by adjusting the auxiliary cooling water circulation valve so that the cooling water that has passed through the heating medium bypasses the engine and returns to the cooling water transmission unit. The method of claim 11, wherein the cooling water circulation unit,
A cooling water cooler provided on the cooling water circulation line to cool the cooling water; And
Further provided in the cooling water circulation line upstream of the cooling water cooler and further includes a fresh water generator for generating fresh water from sea water using the high-temperature cooling water discharged from the engine,
When the engine is stopped, the cooling water circulation unit controls the auxiliary cooling water circulation valve so that coolant that has passed through the heat boosting unit passes through the fresh water generator and bypasses the engine to be returned to the cooling water transmission unit. system. A ship characterized by having the gas treatment system according to any one of claims 1, 2, 4, 5, 7 to 13.

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