KR102219135B1 - Volatile organic compounds treatment system and ship having the same - Google Patents

Abstract

The present invention relates to a VOC treatment system and a ship, wherein the VOC treatment system according to an aspect of the present invention comprises: a VOC treatment unit for supplying VOC generated from an oil storage tank provided on the ship to an engine mounted on the ship; A gas fuel processing unit for mixing gas fuel from a gas fuel storage tank provided in the ship with VOC supplied to the engine; A gas analyzer for measuring the methane number of VOC and gas fuel before mixing; And a control unit for respectively controlling flow rates of VOC and gas fuel delivered to a mixing point of VOC and gas fuel according to the measured value of the gas analyzer.

Description

Volatile organic compounds treatment system and ship having the same}

The present invention relates to a volatile organic compound treatment system (hereinafter referred to as a VOC treatment system) and a ship.

In general, a crude oil carrier is a ship that ships crude oil mined from a production site in a number of cargo tanks for storing crude oil and transports it to a consumer through sea, and is referred to as an oil tanker, oil carrier, oil tanker, etc., and a cargo that stores crude oil. Depending on the size of the tank, it is also called VLCC or ULCC.

Such a crude oil carrier sails with a sufficient amount of crude oil loaded in 3 to 5 cargo tanks arranged side by side in the front and rear direction of the hull.At this time, the crude oil stored in the cargo tank is a liquid hydrocarbon naturally produced underground. Or it is collectively referred to as purified.

However, such crude oil generates a large amount of volatile organic compounds (hereinafter, referred to as VOCs) in the process of being loaded onto a crude oil carrier and/or in a state of being loaded into a cargo tank of a crude oil carrier.

VOCs generated in this way are very harmful to the human body, and when discharged into the atmosphere, they cause air pollution and environmental pollution, as well as causing loss of crude oil transported by the amount of VOC generated. There is.

Therefore, recently, various researches and developments have been continuously conducted on a method for recycling VOCs generated in crude oil carriers into the atmosphere without releasing them into the atmosphere, but an effective method has not yet been derived.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to solve the environmental pollution problem and prevent the waste of crude oil by using VOC generated from crude oil for propulsion of the hull. It is to provide a treatment system and a ship.

In addition, an object of the present invention is to provide a VOC treatment system and a vessel capable of increasing treatment efficiency by controlling control according to the amount of VOC generated from crude oil.

In addition, an object of the present invention is to provide a VOC treatment system and a vessel capable of suppressing unnecessary energy consumption by reabsorbing VOCs generated in the process of loading crude oil into the tank.

A VOC treatment system according to an aspect of the present invention includes a VOC processing unit for supplying VOC generated from an oil storage tank provided on a ship to an engine mounted on the ship; A gas fuel processing unit that mixes the liquefied gas of the gas fuel storage tank provided in the ship with VOC supplied to the engine; A gas analyzer for measuring the methane number of VOC and liquefied gas before mixing; And a control unit for respectively controlling flow rates of VOC and liquefied gas delivered to a mixing point of VOC and liquefied gas according to the measured value of the gas analyzer.

Specifically, the control unit may respectively control the flow rates of the VOC and the liquefied gas so that the methane number of the mixture of VOC and liquefied gas meets the requirements of the engine.

Specifically, at least one of the VOC processing unit and the gas fuel processing unit may further include a delivery valve for adjusting the flow rate.

Specifically, the control unit may adjust the flow rate of the delivery valve.

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

The VOC treatment system and ship according to the present invention can effectively prevent environmental pollution by using VOC as fuel for the engine, suppressing the emission of VOC into the atmosphere.

In addition, the VOC treatment system and the vessel according to the present invention have an effect of maximizing VOC treatment efficiency and energy consumption efficiency by changing the treatment configuration according to the generation time of VOC.

In addition, the VOC treatment system and ship according to the present invention can reduce operating costs by recovering VOCs generated in the bunkering process to a tank so that when loading is completed, there is no need to process VOCs.

1 is a side view of a ship having a VOC treatment system according to the first to fourth embodiments of the present invention.
2 is a conceptual diagram of a VOC treatment system according to a first embodiment of the present invention.
3 is a conceptual diagram of a VOC treatment system according to a second embodiment of the present invention.
4 is a conceptual diagram of a VOC treatment system according to a third embodiment of the present invention.
5 is a conceptual diagram of a VOC treatment system according to a fourth embodiment of the present invention.
6 is a side view of a ship having a VOC treatment system according to the fifth and sixth embodiments of the present invention.
7 is a conceptual diagram of a VOC treatment system according to a fifth embodiment of the present invention.
8 is a conceptual diagram of a VOC treatment system according to a sixth embodiment of the present invention.
9 is a conceptual diagram of a ship including the VOC treatment system according to the seventh to eleventh embodiments of the present invention.
10 is a conceptual diagram of a VOC treatment system according to a seventh embodiment of the present invention.
11 is a conceptual diagram of a VOC treatment system according to an eighth embodiment of the present invention.
12 is a conceptual diagram of a VOC treatment system according to a ninth embodiment of the present invention.
13 is a conceptual diagram of a VOC processing system according to a tenth embodiment of the present invention.
14 is a conceptual diagram of a VOC processing system according to an eleventh embodiment of the present invention.
15 is a conceptual diagram of a VOC treatment system according to a twelfth embodiment of the present invention.
16 is a conceptual diagram of a VOC processing system according to a thirteenth embodiment of the present invention.
17 is a conceptual diagram of a VOC treatment system according to a fourteenth embodiment of the present invention.
18 is a conceptual diagram of a VOC processing system according to a fifteenth embodiment of the present invention.
19 is a conceptual diagram of a VOC processing system according to a sixteenth embodiment of the present invention.
20 is a conceptual diagram of a VOC treatment system according to a seventeenth embodiment of the present invention.
21 is a conceptual diagram of a ship including a VOC treatment system according to an 18th embodiment of the present invention.
22 is a conceptual diagram of a ship including a VOC treatment system according to a nineteenth embodiment of the present invention.
23 is a conceptual diagram of a ship including the VOC treatment system according to the 19th embodiment of the present invention.
24 is a conceptual diagram of a ship including a VOC treatment system according to a nineteenth embodiment of the present invention.
25 is a conceptual diagram of a VOC processing system according to a 19th embodiment of the present invention.
26 is a conceptual diagram of a VOC treatment system according to a twentieth embodiment of the present invention.
27 is a conceptual diagram of a VOC processing system according to the 21st and 22nd embodiments 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 related known technologies may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

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

At this time, it should be noted that ships are used to encompass all offshore plants such as FSRU and FPSO in addition to crude oil carriers that load crude oil that can generate VOCs. In addition, the ship may include a bunkering vessel for supplying crude oil to other ships or land, in addition to a ship supplied to load or consume crude oil.

Hereinafter, the liquefied gas is a substance whose boiling point is lower than room temperature and becomes gaseous at room temperature, and may be LPG, LNG, ethane, propane, butane, ethylene, ammonia, liquid nitrogen, etc., and may mean LNG as an example. In addition, in the following, oil or crude oil has a meaning of encompassing all substances (crude oil, kerosene, heavy oil, diesel, etc.) used as fuels, which become liquid at room temperature because the boiling point is higher than room temperature.

In addition, it should be noted that the liquefied gas or evaporative gas is not limited to a liquid or gaseous phase despite the expression, and VOC is also not limited to a liquid or gaseous phase.

1 is a side view of a ship having a VOC treatment system according to the present invention, and FIG. 2 is a conceptual diagram of a VOC treatment system according to a first embodiment of the present invention.

1 and 2, the VOC treatment system 1 according to the first embodiment of the present invention includes an oil storage tank OT, a gas fuel storage tank GT, and a VOC treatment unit 10, These configurations may be mounted on the ship (S).

The ship (S) on which the VOC treatment system (1) is mounted includes the hull, and the cabin or engine casing can be mounted on the stern side from the upper deck of the hull, and engines (ME, GE, DE) on the stern side from the inside of the hull Can be provided.

At this time, the oil storage tank OT may be a cargo tank mounted inside the ship S, and thus the ship S may be a crude oil carrier. On the other hand, the gas fuel storage tank GT may be a high-pressure storage container mounted on the upper deck of the ship S, and may be provided on the port side and the starboard side respectively.

In the present specification, the engine (ME, GE, DE) is an engine that consumes VOC, and is a ME-GI, ME-GIE, ME-LGI, XDF, etc. as a propulsion engine (ME) that propels the hull, and/or a ship ( S) It may be a power generation engine (GE) that supplies power to the inside. However, below, it is noted that the engine (ME, GE, DE) may be a concept encompassing all facilities (DE) that can consume VOC.

The oil storage tank OT loads oil such as crude oil. Five oil storage tanks OT may be arranged in series in a longitudinal direction inside the hull, and the storage capacity of each oil storage tank OT is not particularly limited.

VOCs generated from crude oil are present inside the oil storage tank OT, and the VOC may be a material including components such as propane and butane.

In the conventional case, such explosive and toxic VOCs were simply discharged to the atmosphere or re-liquefied and stored and then unloaded on land, but in this embodiment, in order to utilize the energy possessed by VOCs, an engine (ME, GE, DE) can be operated.

To this end, the VOC discharge line 13 can be connected from the oil storage tank OT to the engine (ME, GE, DE), and the inlet end of the VOC discharge line 13 is open to the upper inner side of the oil storage tank OT. Can be laid out

The gas fuel storage tank (GT) stores liquefied gas. As described above, when the vessel S of the present invention is a crude oil carrier having an oil storage tank OT as a cargo tank, the gas fuel storage tank GT may be mounted on the upper deck as a Type C type.

Liquefied gas stored in the gas fuel storage tank (GT) can be mixed with the VOC generated in the oil storage tank (OT) and supplied to the engine (ME, GE, DE), and for this purpose, the VOC from the gas fuel storage tank (GT) A gas fuel supply line 23 may be provided up to the discharge line 13, and a mixer 27 may be provided at a point where the gas fuel supply line 23 is connected to the VOC discharge line 13. For reference, components used to process gas fuel in the present specification may be collectively referred to as the gas fuel processing unit 20, and the gas fuel processing unit 20 and the VOC processing unit 10 hereinafter include fuel processing units 10 and 20. Note that it is covered by.

The gas fuel storage tank GT can store liquefied gas at high pressure, and the high pressure may mean the required pressure of the engine (ME, GE, DE). Therefore, the liquefied gas discharged from the gas fuel storage tank (GT) may be in a state with the required pressure of the engine (ME, GE, DE), so the VOC treatment unit 10 to be described later is discharged from the gas fuel storage tank (GT). Liquefied gas can be supplied to engines (ME, GE, DE) without separate compression (or through compression at a smaller ratio compared to VOC).

The VOC processing unit 10 supplies VOC generated from the oil storage tank OT as fuel of the engines ME, GE, and DE mounted on the ship S. To this end, the VOC processing unit 10 may include a VOC compressor 11 and a reformer 12.

The VOC compressor 11 compresses VOC. The VOC compressor 11 can compress VOC to the required pressure of the engine (ME, GE, DE), and the required pressure of the engine (ME, GE, DE) is according to the type of the engine (ME, GE, DE). It can be determined in various ways. As an example, the VOC compressor 11 may compress VOCs in and out of 10 to ME, GE, DE bar or 100 to ME, GE, DE0 bar, and the like.

The VOC compressor 11 may be provided in multiple stages, and an intermediate cooler (not shown) may be provided between the VOC compressors 11 provided in multiple stages. In addition, the VOC compressor 11 may be provided in parallel to enable backup to each other.

The reformer 12 modifies the compressed VOC and supplies it to the engines ME, GE, and DE. The reformer 12 may be methanized by chemically treating VOCs including propane and butane.

Since the chemical action by the reformer 12 is already widely known, a detailed description will be omitted. However, in this embodiment, the engine (ME, GE, DE) may be an engine that mainly consumes methane contained in LNG, and the reformer 12 uses various methods to convert VOC into fuel of the engine (ME, GE, DE). It can be transformed into a suitable state.

The VOC processing unit 10 mixes the VOC with liquefied gas and supplies it to the engines (ME, GE, DE), and in this case, the mixer 27 mentioned above may be used. The mixer 27 may be provided on the VOC discharge line 13 downstream of the reformer 12, and the VOC processing unit 10 consumes methane by mixing the VOC reformed by the reformer 12 with liquefied gas. Even if a mixture of liquefied gas and VOC is supplied to the engine, it is possible to ensure that there is no problem in operation.

The VOC compressor 11, the reformer 12, and the mixer 27 may be provided on the VOC discharge line 13, and the VOC discharge line 13 is from an oil storage tank OT to an engine (ME, GE). , DE) to deliver VOC. Of course, the VOC generated from the oil storage tank (OT) is reformed and supplied to the engines (ME, GE, DE), so the engines (ME, GE, DE) can operate stably.

A gas fuel supply line 23 that delivers liquefied gas from the gas fuel storage tank (GT) to the engines (ME, GE, DE) may be connected to the VOC discharge line 13, but the gas fuel supply line 23 A fuel vaporizer 22 may be provided.

The gas fuel vaporizer 22 may vaporize liquefied gas using various heat sources. Liquefied gas can be stored at high pressure in the gas fuel storage tank (GT) and maintain a liquid phase. The liquid high-pressure liquefied gas discharged from the gas fuel storage tank (GT) is vaporized in the gas fuel carburetor 22 and the engine ( ME, GE, DE) can be heated below the required temperature.

However, since the modified VOC discharged by the reformer 12 may have a temperature higher than the required temperature of the engine (ME, GE, DE) during the reforming process (for example, 300 degrees to 500 degrees), the gas fuel vaporizer 22 ) Can control the heating of the liquefied gas according to the temperature of the VOC discharged from the reformer 12.

At this time, the control of the gas fuel vaporizer 22, in addition to the temperature of the VOC discharged from the reformer 12, the flow rate of VOC delivered to the engines (ME, GE, DE), and the liquefied gas discharged from the gas fuel storage tank (GT). It can be considered together with the flow rate, and for this purpose, various sensors (not shown) may be provided in the VOC discharge line 13 and/or the gas fuel supply line 23.

The VOC compressor 11 compresses VOC to the required pressure of the engine (ME, GE, DE), and the gas fuel storage tank (GT) stores the liquefied gas at the required pressure of the engine (ME, GE, DE). The processing unit 10 mixes the liquefied gas discharged from the gas fuel storage tank GT with the VOC compressed by the VOC compressor 11 without separate compression (or through compression at a smaller ratio compared to the VOC compressor 11). It can be supplied to engines (ME, GE, DE).

As described above, this embodiment utilizes VOC generated in the oil storage tank OT as fuel for engines (ME, GE, DE) operated by liquefied gas, and efficiently consumes VOC to suppress environmental pollution, There is no need to prepare a facility for liquefying VOC, which can significantly reduce costs.

3 is a conceptual diagram of a VOC treatment system according to a second embodiment of the present invention.

Referring to FIG. 3, in the VOC treatment system 1 according to the second embodiment of the present invention, a heat exchanger 16 may be provided in place of the mixer 27 in contrast to the first embodiment.

Hereinafter, the description will be made mainly on points that the present embodiment is different from the previous embodiment, and portions omitted from the description will be replaced with the previous contents. Note that this is the same in other embodiments below.

The heat exchanger 16 may be provided in a two-stream structure having a flow path through which VOC flows and a flow path through which liquefied gas flows. At this time, the flow path through which the VOC flows may be parallel to the VOC discharge line 13, and the flow path through which the liquefied gas flows may be parallel to the gas fuel supply line 23.

Since the VOC discharged from the reformer 12 may be in a high temperature state, the present embodiment can reduce the temperature of the VOC to the required temperature of the engines (ME, GE, DE) by utilizing a relatively low temperature liquefied gas.

That is, the heat exchanger 16 cools the VOC while exchanging the VOC discharged from the reformer 12 with liquefied gas, so that the modified VOC can be in a state suitable for the required temperature of the engine (ME, GE, DE). .

However, on the contrary, since the temperature of the liquefied gas will rise due to heat exchange with VOC, taking this into account, the gas fuel carburetor 22 can heat the liquefied gas to a temperature lower than the required temperature of the engines (ME, GE, DE). Alternatively, the gas fuel vaporizer 22 itself may be omitted.

When the gas-fuel vaporizer 22 is omitted, the heat exchanger 16 has a space in which the liquefied gas is stored in a liquid state, and a high-temperature VOC flows inside the liquid liquefied gas to heat/vaporize the liquefied gas, and at the same time, the VOC is It may have a structure in the form of a storage tank to cool. Of course, the structure of the heat exchanger 16 is not particularly limited.

In this embodiment, the VOC discharge line 13 and the gas fuel supply line 23 may be provided in parallel and connected to the engines ME, GE, and DE, respectively. That is, the VOC is not mixed with the liquefied gas and is introduced into the engines (ME, GE, DE), and can be mixed and used inside the engines (ME, GE, DE).

Of course, unlike the drawings, this embodiment is combined with the first embodiment so that the gas fuel supply line 23 is connected to the VOC discharge line 13 downstream of the heat exchanger 16 and upstream of the engine (ME, GE, DE). It can also have a connected structure.

That is, in the present invention, the VOC having a higher temperature than the required temperature of the engine (ME, GE, DE) during the reforming process is suitable for the required temperature of the engine (ME, GE, DE) by using a relatively low temperature liquefied gas. Any variations that can be cooled may be included.

4 is a conceptual diagram of a VOC treatment system according to a third embodiment of the present invention.

4, the VOC treatment system 1 according to the third embodiment of the present invention further includes a VOC storage tank 15.

The VOC storage tank 15 may temporarily store at least some of the compressed VOCs. A VOC discharge line 13 is provided from the oil storage tank OT to the engine (ME, GE, DE), which is compressed by the VOC compressor 11 on the VOC discharge line 13 and then flows into the reformer 12. Some of the previous VOC may be delivered to the VOC storage tank 15 along the VOC storage line 151 and stored in the VOC storage tank 15.

At least some of the VOCs do not flow into the reformer 12 from the downstream of the VOC compressor 11 and flow into the VOC storage tank 15. The flow rate of the VOC generated in the oil storage tank OT is determined by the engine (ME, GE, This can be done if the amount that can be consumed in DE) is exceeded.

That is, depending on the load of the engine (ME, GE, DE), a certain amount of VOC is delivered to the VOC storage tank 15 through the VOC storage line 151 branching from the upstream of the reformer 12 in the VOC discharge line 13 Can be.

To this end, a flow meter 131 for measuring the flow rate of VOC may be provided in the VOC discharge line 13, and a valve (not shown) is provided in the VOC discharge line 13 and/or the VOC storage line 151. Provided, the opening degree of the valve can be adjusted according to the load of the flow meter 131 and the engine (ME, GE, DE).

In the VOC storage tank 15, boil-off gas generated from the gas fuel storage tank GT may be introduced. To this end, a boil-off gas supply line 26 may be connected from the gas fuel storage tank GT to the VOC storage tank 15.

The VOC storage tank (15) can store excess VOC that cannot be consumed by the engine (ME, GE, DE) and boil-off gas generated from the gas fuel storage tank (GT), and the VOC storage tank (15) VOCs can be stored at a higher pressure than the storage tank (OT). In particular, the internal pressure of the VOC storage tank 15 may be adjusted according to the delivery amount of the boil-off gas.

The mixture of VOC and boil-off gas stored in the VOC storage tank 15 is delivered to the reformer 12 to be supplied to the engines (ME, GE, DE) when necessary. A VOC supply line 152 may be provided from the VOC storage tank 15 to the reformer 12, and the mixture is stored in the VOC storage tank 15, and then the operating load of the engines (ME, GE, DE), oil According to conditions such as the flow rate of VOC discharged from the storage tank OT and the remaining amount of liquefied gas in the gas fuel storage tank GT, it may be delivered to the reformer 12.

As the reformer 12, the VOC discharge line 13 and the VOC supply line 152 may be individually connected, compared to the VOC delivered from the VOC discharge line 13 to the reformer 12, the reformer from the VOC supply line 152 The mixture delivered to (12) has a higher methane ratio. At this time, the reformer 12 may perform modification in consideration of the components of the VOC and the mixture, respectively, and detailed chemical action may use a known technique.

In addition, the pressure of the mixture may be higher than that of the VOC flowing into the reformer 12. In this embodiment, the pressure gauges 132 and 233 are respectively connected to the VOC discharge line 13 and the VOC supply line 152 connected to the reformer 12. ), it is possible to control the VOC compressor 11 and various valves (not shown) in consideration of the pressure difference.

As described above, in this embodiment, when excess VOC is generated, it is stored in the VOC storage tank 15 together with the evaporated gas, and then supplied to the engine (ME, GE, DE) and used, thereby improving system efficiency. have.

5 is a conceptual diagram of a VOC treatment system according to a fourth embodiment of the present invention.

5, the VOC treatment system 1 according to the fourth embodiment of the present invention includes a VOC storage tank 15 similar to the third embodiment, but unlike the previous embodiments, it stores gas fuel. May not contain a tank (GT).

That is, in this embodiment, the VOC generated in the oil storage tank OT is supplied to the engine (ME, GE, DE) through the VOC compressor 11 and the reformer 12, or at least some VOC is supplied to the VOC compressor ( After compressing with 11), it can be stored in the VOC storage tank 15. At this time, the VOC storage tank 15 may be a tank that stores VOCs made of propane and butane.

The VOC stored in the VOC storage tank 15 can be supplied to the engines (ME, GE, DE) through the reformer 12 if necessary. In this case, the VOC supply line 152 may be connected from the VOC storage tank 15 to the reformer 12 or the VOC discharge line 13.

As a modified example, a VOC storage tank 15 is provided on the VOC discharge line 13 so that the VOC storage tank 15 serves as a buffer tank between the oil storage tank OT and the reformer 12 , The VOC storage line 151 or the VOC supply line 152 may not be provided.

In addition, as a modified example, when the engine (ME, GE, DE) is an engine that consumes propane or butane rather than an engine that consumes methane, the reformer 12 may be omitted in this embodiment. However, in order to adjust the VOC to the required temperature of the engine (ME, GE, DE), a heater (not shown) that heats the VOC using an unrestricted fruit such as seawater may be provided by replacing the reformer 12. have.

As described above, in this embodiment, the VOC is removed from the oil storage tank OT and stored and used, so that stable operation is possible regardless of fluctuations in the amount of VOC emissions.

6 is a side view of a ship having a VOC treatment system according to the fifth and sixth embodiments of the present invention, and FIG. 7 is a conceptual diagram of a VOC treatment system according to the fifth embodiment of the present invention.

First, referring to Figure 6, the vessel (S) having a VOC treatment system (1) according to the present invention, an oil storage tank (OT), a VOC liquefier 14, a VOC storage tank 15, a gas fuel storage tank (GT).

The oil storage tank OT is provided in the ship in the ship S, and a plurality of oil storage tanks OT may be arranged in the longitudinal direction of the hull. Oil such as crude oil stored in the oil storage tank OT may be in a liquid state and may be stored at room temperature.

However, the crude oil stored in the oil storage tank OT contains VOCs (propane, butane, etc.) having a boiling point higher than room temperature, and these VOCs evaporate in the oil storage tank OT. At this time, the evaporated VOC may be processed by the VOC liquefier 14 and transferred to the VOC storage tank 15.

The VOC liquefier 14 liquefies VOC generated from the oil storage tank OT and delivers it to the VOC storage tank 15. When the VOC evaporates from the crude oil in the oil storage tank OT, the VOC may be a problem by raising the pressure in the oil storage tank OT, and thus may be discharged to the outside for durability of the oil storage tank OT.

To this end, a VOC discharge line 13 is provided in the oil storage tank OT, and the VOC discharge line 13 is connected to the VOC liquefier 14. The VOC liquefier 14 receives and cools the gaseous VOC, and the cooled VOC is liquefied, so that the volume can be significantly reduced.

In order to liquefy the VOC, various types of refrigerants that are not limited may be used. For example, the refrigerant may be nitrogen, liquefied gas, R134a, propane, or the like. The VOC liquefier 14 may be a kind of heat exchanger for exchanging such refrigerant with VOC in a gaseous state.

The VOC storage tank 15 stores VOC generated from the oil storage tank OT provided on the ship S. The VOC storage tank 15 can store VOC in a liquid state liquefied in the VOC liquefier 14 after being discharged in a gaseous form from the oil storage tank OT, and is insulated to suppress the re-evaporation of VOC. Or it may have the form of a high pressure vessel to increase the boiling point.

The VOC storage tank 15 may be provided outside the ship in the vessel S, and for example, may be provided above the upper deck. Alternatively, the VOC storage tank 15 may be provided in a ship space other than the place where the oil storage tank OT is disposed, and for example, may be provided inside the engine room or between the engine room and the ship side shell.

The VOC discharged from the oil storage tank OT and stored in the VOC storage tank 15 can be used as fuel for engines (ME, GE, DE) provided in the ship S. However, since VOC alone may have a low methane number and lower efficiency, the present invention guarantees the methane number to increase the operating efficiency of the engines (ME, GE, DE), by mixing liquefied gas with VOC to increase the engine (ME , GE, DE).

The gas fuel storage tank (GT) stores liquefied gas. When the vessel S is a crude oil carrier equipped with an oil storage tank OT as a cargo tank, the gas fuel storage tank GT may be mounted on the upper deck in a Type C type.

That is, the gas fuel storage tank GT may be a high-pressure storage container mounted on the upper deck, placed in front of the cabin on the upper deck, and may be provided on the port side and/or the starboard side.

Liquefied gas stored in the gas fuel storage tank (GT) can be mixed with VOC in the VOC storage tank (15) and supplied to the engine (ME, GE, DE), and for this purpose, the engine ( ME, GE, DE) is provided with an auxiliary tank 155, which will be described later, and a gas fuel supply line 23 may be provided between the gas fuel storage tank GT and the auxiliary tank 155, and gas fuel supply The line 23 is provided with a one-way valve (not shown) and a flow meter 231.

The gas fuel storage tank (GT) can store liquefied gas at high pressure. In this case, when the internal pressure of the gas fuel storage tank (GT) is higher than the required pressure of the engine (ME, GE, DE), the gas fuel pump (21) to be described later. Can be omitted.

Referring to Figure 7, the VOC treatment system 1 according to the fifth embodiment of the present invention, by mixing VOC and liquefied gas stored in the VOC storage tank 15 and the gas fuel storage tank (GT), respectively, the engine (ME , GE, DE) and a fuel processing unit (10, 20) supplying the fuel.

For reference, the fuel processing units 10 and 20 include a VOC processing unit 10 that includes components used to treat VOCs, and a gas fuel processing unit 20 that includes components used to process gas fuel. .

At this time, the engine (ME, GE, DE) may be a propulsion engine (ME) that is mounted on the ship (S) and propels the ship (S) or a power generation engine (GE, DE) that supplies power to the ship (S). For example, the propulsion engine (ME) is an X-DF engine with a required pressure of 10 to 50 bar (for example, 16 bar), and the power generation engine (GE, DE) is a required pressure of 1 to 10 bar (for example, about 6 bar). It may be a DFDE engine with

The fuel processing units 10 and 20 may control the flow rate of VOC and liquefied gas to control the methane number of fuel supplied to the engines ME, GE, and DE. When the propulsion engine (ME) is an X-DF engine (Otto cycle engine), since VOC has a low methane number, knocking may occur if only VOC is used as a single fuel.

Therefore, the fuel processing units 10 and 20 may satisfy the methane number required for each load in the engines (ME, GE, DE) by mixing liquefied gas with VOC at an appropriate ratio to prevent smooth combustion and knocking.

To this end, the fuel processing units 10 and 20 may include a gas analyzer 232, an auxiliary tank 155, and a control unit 30.

The gas analyzer 232 measures the methane number of fuel supplied from the auxiliary tank 155 to the engines (ME, GE, DE). However, in the present specification, it is noted that the methane number can be interpreted as encompassing all specifications of the fuel such as components of fuel or calories in addition to the Methane Number. That is, the gas analyzer 232 of the present invention can also be viewed as a calorie meter or a component meter.

The auxiliary tank 155 mixes VOC and liquefied gas upstream of the engines (ME, GE, DE). A material in which VOC and liquefied gas are mixed in the auxiliary tank 155 may be referred to as fuel in the present specification.

A gas fuel supply line 23 can be provided from the auxiliary tank 155 to the engine (ME, GE, DE), and the gas fuel supply line 23 requires fuel pressure from the engines (ME, GE, DE). A pressure gauge 233 may be provided to verify whether the pressure corresponds to that.

When the engine (ME, GE, DE) includes the X-DF propulsion engine (ME) and the DFDE power generation engine (GE, DE), the gas fuel supply line 23 is the propulsion engine (ME) and the power generation engine (GE, DE). DE) can be branched from the downstream of the auxiliary tank 155 to be connected. At this time, pressure regulating valves 234a and 234b may be provided in the upstream of the propulsion engine ME and upstream of the power generation engines GE and DE at the downstream of the branch point.

Since the fuel discharged from the auxiliary tank 155 can have a pressure tailored to the higher required pressure among the required pressure of the propulsion engine (ME) and the required pressure of the power generation engines (GE, DE), The pressure control valve 234b provided upstream may implement a reduced pressure.

The auxiliary tank 155 may generate liquid fuel by mixing liquid VOC delivered through the VOC pump 154 and liquid liquefied gas delivered through the gas fuel pump 21, and convert the fuel into a liquid engine. (ME, GE, DE) can be supplied. Alternatively, the auxiliary tank 155 may be provided with a heater (not shown) or the like for vaporizing fuel in order to supply fuel to the engines ME, GE, and DE in the gas phase.

The heater may be provided inside the auxiliary tank 155 or in a separate external line through which fuel circulates in the auxiliary tank 155, and various materials such as steam or glycol water may be used. The fuel vaporized by the heater may be supplied to and consumed by the engines ME, GE, DE through a pressure gauge 233, a gas analyzer 232, and pressure control valves 234a and 234b.

The controller 30 controls the flow rate of VOC and/or liquefied gas flowing into the auxiliary tank 155. Accordingly, the ratio of VOC and liquefied gas contained in the fuel generated in the auxiliary tank 155 may be adjusted by the controller 30.

The control unit 30 may control the flow rate of VOC and/or liquefied gas delivered to the auxiliary tank 155 in various ways. For example, a VOC pump 154 is provided inside and/or outside the VOC storage tank 15 to deliver VOC to the engine (ME, GE, DE), and inside and/or outside the gas fuel storage tank (GT). There may be provided a gas fuel pump 21 for delivering liquefied gas to the engines (ME, GE, DE), the controller 30 controls the VOC pump 154 and the gas fuel pump 21.

At this time, the control unit 30 controls the VOC pump 154 and the gas fuel pump 21 according to the measured values of the gas analyzer 232 to determine the methane number of the fuel generated in the auxiliary tank 155 by the engines (ME, GE, DE) can be tailored to the required level.

To this end, the VOC pump 154 and/or the gas fuel pump 21 may be provided to enable variable frequency control (VFD), but any one of the VOC pump 154 or the gas fuel pump 21 It goes without saying that one is a fixed capacity type and only the other may be provided as a variable capacity type. In this case, the controller 30 may control the variable displacement pump in consideration of the operation (On/Off) of the fixed displacement pump.

As described above, when the internal pressure of the gas fuel storage tank GT is greater than or equal to the required pressure of the engines ME, GE, DE, the gas fuel pump 21 may be omitted, so the controller 30 is the VOC pump 154. Methane number can be adjusted through operation control. Of course, since a valve (not shown) may be provided on the gas fuel supply line 23 when the gas fuel pump 21 is omitted, the control unit 30 includes the VOC pump 154 and the gas fuel supply line 23 Methane number can be controlled through the valve on the top.

From the VOC storage tank 15 to the auxiliary tank 155, a VOC supply line 152 including a one-way valve (not shown) or a flow meter 156 may be provided, and in the VOC supply line 152 Downstream of the VOC pump 154, a VOC return line 157 for returning at least some of the VOCs to the VOC storage tank 15 may be provided. At this time, a VOC return valve 1571 as a return valve may be provided on the VOC return line 157.

In the same/similar manner, a gas fuel return line 235 for returning at least some of the liquefied gas discharged from the gas fuel storage tank GT is provided in the gas fuel supply line 23 and on the gas fuel return line 235 A gas fuel return valve 236 as a return valve may be provided.

In this case, the control unit 30 controls the VOC return valve 1571 and/or the gas fuel return valve 236 according to the measured value of the gas analyzer 232, and controls the engine ME, by the VOC return valve 1571. The flow rate of VOC delivered to GE, DE and/or the flow rate of liquefied gas delivered to the engine (ME, GE, DE) by the gas fuel return valve 236 is controlled, so that the methane number of the fuel is adjusted to the engine (ME, DE). GE, DE).

When controlling the VOC pump 154 and the gas fuel pump 21 and/or the VOC return valve 1571 and the gas fuel return valve 236, the VOC and liquefaction flowing into the auxiliary tank 155 Flow meters 156 and 231 may be used to check whether the flow rate of gas is properly controlled, and flow meters 156 and 231 may be provided in the VOC supply line 152 and the gas fuel supply line 23, respectively. .

Therefore, the control unit 30 actively controls the flow rate of the VOC and liquefied gas flowing into the auxiliary tank 155 by measuring the methane number of the fuel downstream of the auxiliary tank 155, and verifying through the flow meters 156 and 231 It can guarantee an appropriate methane number.

As described above, in this embodiment, the VOC that has been thrown into the atmosphere is used as fuel for the engines (ME, GE, DE), but the specifications of the fuel required by the engines (ME, GE, DE) (methane number, calories, components, etc.) In order to satisfy, liquefied gas is mixed with VOC and supplied to engines (ME, GE, DE), so that VOC can be reused while ensuring engine operation efficiency (ME, GE, DE).

8 is a conceptual diagram of a VOC treatment system according to a sixth embodiment of the present invention.

Referring to Figure 8, the VOC treatment system 1 according to the sixth embodiment of the present invention, VOC is mixed with liquefied gas and supplied to the propulsion engine (ME), and only liquefied gas is supplied to the power generation engines (GE, DE). Can supply. Hereinafter, the description will be made mainly on points that the present embodiment is different from the previous embodiment, and portions omitted from the description will be replaced with the previous contents.

In this embodiment, the propulsion engine ME may be a ME-GI engine having a required pressure of 200 to 400 bar (for example, about 380 bar). However, in the case of ME-GI engines, if only VOC (the amount of heat generated per volume injected into the engines (ME, GE, DE) is higher than methane, which is the main component of liquefied gas), the energy density is too high. Can be guaranteed.

In order to meet the required pressure of the ME-GI engine, the VOC supply line 152 between the VOC storage tank 15 and the auxiliary tank 155 and the gas fuel between the gas fuel storage tank GT and the auxiliary tank 155 On the supply line 23, a VOC high pressure pump 158 and a gas fuel high pressure pump 24 may be provided, respectively, and a propulsion engine (ME) in a one-phase state without phase separation by mixing high-pressure VOC and high-pressure liquefied gas. To supply to, a mixer 27 may be provided in place of the auxiliary tank 155 of the previous embodiment.

However, when the VOC pump 154 and the gas fuel pump 21 pressurize VOC at high pressure according to the required pressure of the propulsion engine (ME), or when the auxiliary tank 155 is placed instead of the mixer 27, the auxiliary tank ( When only one high pressure pump (not shown) is placed downstream of 155, the VOC high pressure pump 158 and the gas fuel high pressure pump 24 may be omitted.

Between the VOC pump 154 and the mixer 27 and between the gas fuel pump 21 and the mixer 27, a VOC vaporizer 159 and a gas fuel vaporizer 22 may be provided, respectively. The VOC vaporizer 159 and the gas fuel vaporizer 22 may respectively heat VOC and liquefied gas in response to the required temperature of the propulsion engine (ME). Of course, instead of the VOC vaporizer 159 and the gas fuel vaporizer 22, it is also possible to place one heat exchanger (not shown) downstream of the mixer 27.

In this embodiment, a gas fuel branch line 25 may be provided from the gas fuel supply line 23 to the power generation engines (GE, DE), and the gas fuel branch line 25 is a gas fuel pump 21 and a gas fuel. It is branched from the gas fuel supply line 23 between the high pressure pumps 24 to deliver liquefied gas to the power generation engines GE and DE.

In the case of the previous embodiment, if the difference in the required pressure between the propulsion engine (ME) and the power generation engine (GE, DE) was at a level that could be covered by the pressure control valve 234b, in the case of this embodiment, the required pressure of the propulsion engine (ME) is 200bar Since the above high pressure is high, it may be difficult to resolve the difference in pressure required between the propulsion engine ME and the power generation engines GE and DE through the pressure control valve 234b.

Therefore, in this embodiment, the line is branched, and a gas fuel high pressure pump 24 is provided on the side of the propulsion engine ME to match the required pressure of the propulsion engine ME, and pressurized to high pressure by the gas fuel high pressure pump 24 The liquefied gas before it can be supplied to the power generation engines (GE, DE) to meet the required pressure of the power generation engines (GE, DE).

Even in this configuration, pressure control valves 234a and 234b may be provided respectively upstream of the propulsion engine (ME) and the power generation engines (GE, DE), as well as the pressure control valve 234b in the gas fuel branch line 25. ) In addition to the gas fuel heater 251 may be provided.

As described above, in this embodiment, when using a high-pressure propulsion engine (ME) of 200 bar or more, by mixing liquefied gas with VOC to adjust the energy density, it is possible to ensure the operating efficiency of the propulsion engine (ME) while utilizing the VOC without discarding. have.

9 is a conceptual diagram of a ship including the VOC treatment system according to the seventh to eleventh embodiments of the present invention, FIG. 10 is a conceptual diagram of the VOC treatment system according to the seventh embodiment of the present invention, and FIG. 11 is the present invention It is a conceptual diagram of the VOC treatment system according to the eighth embodiment.

12 is a conceptual diagram of a VOC processing system according to a ninth embodiment of the present invention, FIG. 13 is a conceptual diagram of a VOC processing system according to a tenth embodiment of the present invention, and FIG. It is a conceptual diagram of the VOC treatment system according to.

Before describing the VOC treatment system 1 according to the embodiment of the present invention in detail, first, referring to FIG. 9, the vessel S having the VOC treatment system 1 according to the embodiment of the present invention will be described. Do it.

Referring to Figure 9, the vessel (S) having a VOC treatment system (1) according to an embodiment of the present invention, an oil storage tank (OT), a VOC storage tank (15), a gas fuel storage tank (GT), VOC It includes a processing unit 10, a customer (ME, GE, DE) and a seawater pump 40.

The oil storage tank OT is provided in the ship in the ship S, and a plurality of oil storage tanks OT may be arranged in the longitudinal direction of the hull. Oil such as crude oil stored in the oil storage tank OT may be in a liquid state and may be stored at room temperature.

However, the crude oil stored in the oil storage tank OT contains VOCs (propane, butane) having a boiling point higher than room temperature, and these VOCs evaporate in the oil storage tank OT. At this time, the evaporated VOC may be processed by the VOC processing unit 10 and transferred to the VOC storage tank 15.

The VOC storage tank 15 stores VOC generated from the oil storage tank OT provided on the ship S. The VOC storage tank 15 can store VOC in a liquid state after being discharged from the oil storage tank OT in a gaseous state and then liquefied in the VOC processing unit 10, and is insulated to suppress the re-evaporation of VOCs. Alternatively, it may take the form of a high-pressure container to increase the boiling point.

The VOC storage tank 15 may be provided outside the ship in the ship S, and for example, may be provided above the upper deck. Alternatively, the VOC storage tank 15 may be provided in a ship space other than the place where the oil storage tank OT is disposed, and for example, may be provided inside the engine room or between the engine room and the ship's outer plate.

The VOC discharged from the oil storage tank OT and stored in the VOC storage tank 15 may be used as fuel for the main engine ME or the power generation engine GE provided in the ship S. However, since VOC alone may have a low methane number and low efficiency, the present invention guarantees the methane number to increase the operating efficiency of the main engine (ME) or the power generation engine (GE), a separate reformer (reformer 12 )) to match the methane value and supply it to the main engine (ME) or power generation engine (GE), or mix liquefied gas with VOC and supply it to the main engine (ME) or power generation engine (GE).

The gas fuel storage tank (GT) stores liquefied gas. When the vessel S is a crude oil carrier equipped with an oil storage tank OT as a cargo tank, the gas fuel storage tank GT may be mounted on the upper deck in a Type C type.

That is, the gas fuel storage tank GT may be a high-pressure storage container mounted on the upper deck, placed in front of the cabin from the upper deck, and may be provided on the port side and/or the starboard side.

The liquefied gas stored in the gas fuel storage tank (GT) is supplied to the VOC processing unit 10 and can be used to cool the VOC, and is also mixed with the VOC in the VOC storage tank 15 to be a main engine (ME) or a power generation engine. It can be supplied as (GE).

The VOC processing unit 10 liquefies the VOC generated from the oil storage tank OT and delivers it to the VOC storage tank 15 or to a customer (ME, GE, DE). When the VOC evaporates from the crude oil in the oil storage tank OT, the VOC may be a problem by raising the pressure in the oil storage tank OT, and thus may be discharged to the outside for durability of the oil storage tank OT.

To this end, a VOC discharge line 13 is provided in the oil storage tank OT, and the VOC discharge line 13 is connected to the VOC treatment unit 10. The VOC processing unit 10 may receive and cool the VOC in a gaseous state, and the cooled VOC may be liquefied and the volume may be significantly reduced.

For the VOC processing unit 10, the configuration of each embodiment will be described in detail later with reference to FIGS. 10 to 14.

Demands (ME, GE, DE) may consume liquefied gas, evaporative gas or VOC, and may include a main engine (ME), a power generation engine (GE), and other demanders (DE).

The main engine (ME) is a low-speed two-stroke low-pressure gas injection engine (X-DF) that generates the power required to propel the ship (S) and has a required pressure of 10 to 50 bar (for example, around 16 bar). have.

The power generation engine GE generates power required for the ship S, and may be, for example, a heterogeneous fuel engine (DFDE) engine having a required pressure of 1 to 10 bar (for example, within 6 bar).

Other demand (DE) consumes the gas component of VOC, for example, it may be a boiler (Boiler), a gas combustion unit (Gas Combustion Unit). At this time, the gas component of the VOC may be released to the atmosphere or may be stored in a compressed state in an arbitrary storage medium. However, in the following, other demands (DE) may be replaced with a main engine (ME) or a power generation engine (GE).

The seawater pump 40 may be disposed on a deck inside the stern of the ship S and connected through the VOC treatment unit 10 seawater supply line (not shown), and a sea chest through the seawater supply line Seawater can be pumped from and supplied to the VOC treatment unit 10.

The seawater pump 40 may supply seawater to the VOC treatment unit 10 so that seawater can be used to cool the VOC. As the VOC treatment unit 10 is disposed on the upper deck, the height difference with the seawater pump 40 A certain pressure can be applied to the seawater to compensate for the height head that may arise.

10 is a conceptual diagram of a VOC treatment system according to a seventh embodiment of the present invention.

Referring to FIG. 10, the VOC treatment system 1 according to the seventh embodiment of the present invention includes a first VOC compressor 11a, a second VOC compressor 11b, and a first heat exchanger corresponding to the VOC treatment unit 10. (16a), a second heat exchanger (16b), a gas-liquid separator 17, and the like, and further includes a gas fuel processing unit 20 and a control unit 30.

Before describing the individual configurations of the VOC treatment system 1 according to the seventh embodiment of the present invention, basic flow paths for 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.

The VOC treatment system 1 according to the seventh embodiment of the present invention may further include a first VOC discharge line 13a and a second VOC discharge line 13b.

Valves (not shown) capable of adjusting the opening degree may be installed in each line, and the supply amount of boil-off gas or liquefied gas may be controlled according to the adjustment of the opening degree of each valve.

The first VOC discharge line 13a is connected to the VOC discharge line 13 connected from the oil storage tank OT to connect the gas-liquid separator 17, and is formed in parallel with the second VOC discharge line 13b. In addition, a first VOC compressor 11a and a first heat exchanger 16a may be provided.

The second VOC discharge line 13b is connected to the VOC discharge line 13 connected from the oil storage tank OT to connect the gas-liquid separator 17, and is formed in parallel with the first VOC discharge line 13a. It may be provided with a second VOC compressor (11b) and a second heat exchanger (16b).

At this time, a three-way valve (not shown) may be disposed at a location where the first and second VOC discharge lines 13a and 13b diverge from the VOC discharge line 13, and the first VOC Whether or not VOC is supplied to the discharge line 13a or the second VOC discharge line 13b may be controlled.

Hereinafter, individual components that are organically formed by the above-described lines 13a and 13b to implement the VOC treatment system 1 will be described.

The first VOC compressor 11a compresses VOC generated from the oil storage tank OT provided in the ship S, and may be disposed in parallel with the second VOC compressor 11b. Here, the first VOC compressor 11a may have a larger processing capacity than the second VOC compressor 11b, and may be operated at a time when crude oil is shipped to the oil storage tank OT.

Specifically, the first VOC compressor (11a) is provided on the first VOC discharge line (13a) upstream of the first heat exchanger (16a), receives VOC generated from the oil storage tank (OT) and compresses it. It can be supplied to the first heat exchanger 16a.

The second VOC compressor 11b compresses VOC generated from the oil storage tank OT provided in the ship S, and may be disposed in parallel with the first VOC compressor 11a. Here, the second VOC compressor 11b may have a smaller processing capacity than the first VOC compressor 11a, and may be operated at a time when the crude oil is shipped to the oil storage tank OT and then transferred.

Specifically, the second VOC compressor (11b) is provided on the second VOC discharge line (13b) upstream of the second heat exchanger (16b), receives VOC generated from the oil storage tank (OT) and compresses it. It can be supplied to the second heat exchanger 16b.

The first heat exchanger 16a cools the VOC compressed by the first VOC compressor 11a through seawater supplied from the seawater pump 40. Here, the first heat exchanger 16a may supply more cold heat than the second heat exchanger 16b, and may be operated at a time when crude oil is shipped to the oil storage tank OT.

The first heat exchanger 16a heat-exchanges the compressed VOC and seawater from the first VOC compressor 11a, supplies the heat-exchanged VOC to the gas-liquid separator 17, and discharges the heat-exchanged seawater to the sea. have.

The second heat exchanger 16b cools the VOC compressed in the second VOC compressor 11b through liquefied gas or boil-off gas supplied from the gas fuel storage tank GT. Here, the second heat exchanger 16b may supply less cold heat than the first heat exchanger 16a, and may be operated at a time when the crude oil is shipped to the oil storage tank OT and then transferred.

The second heat exchanger (16b) heats the compressed VOC from the second VOC compressor (11b) with liquefied gas or evaporated gas, supplies the heat-exchanged VOC to the gas-liquid separator (17), and the heat exchanged liquefied gas or evaporated gas is It can be supplied to the gas fuel processing unit 20 to be used as fuel for the main engine (ME) or power generation engine (GE).

The gas-liquid separator 17 may be supplied with VOC cooled from the first and second heat exchangers 16a and 16b and re-liquefied at least to separate the gas and liquid phases.

The gas-liquid separator 17 may supply the separated gaseous VOC to other demanders (DE), and may supply the separated liquid VOC to the VOC storage tank 15.

The gas fuel processing unit 20 receives the VOC stored in the VOC storage tank 15 and the liquefied gas or evaporative gas heat-exchanged with the VOC from the second heat exchanger 16b, and receives the main engine (ME) or the power generation engine (GE). It can be treated with usable fuel.

To this end, the gas fuel processing unit 20 may include a gas fuel pump 21 and a gas fuel vaporizer 22 for processing liquefied gas or boil-off gas.

The gas fuel pump 21 may receive the heat-exchanged liquefied gas from the second heat exchanger 16b and pressurize it according to the pressure required by the main engine ME or the power generation engine GE. At this time, when the gas heat-exchanged from the second heat exchanger (16b) is an evaporative gas, it can be compressed according to the pressure required by the main engine (ME) or the power generation engine (GE) by a separately provided evaporative gas compressor (not shown). I can.

The gas fuel vaporizer 22 may vaporize the liquefied gas supplied from the gas fuel pump 21 and heat it to the temperature required by the main engine ME or the power generation engine GE.

The gas fuel processing unit 20 may further include a VOC compressor 11 and a reformer 12, which are part of the VOC processing unit 10.

The VOC compressor 11 may receive VOC from the VOC storage tank 15 and compress it at the required pressure of the main engine (ME) or the power generation engine (GE), and for example, it may compress within 10 to 50 bar.

The VOC compressor 11 may be provided in multiple stages, an intermediate cooler may be provided between the VOC compressors 11 provided in multiple stages, and may be configured in parallel to be designed to be able to back up each other.

The reformer 12 may modify the compressed VOC and supply it to a main engine (ME) or a power generation engine (GE). The reformer 12 may be methanized by chemically treating VOCs including propane and butane. Since the chemical action by the reformer 12 is already widely known, a detailed description will be omitted.

In addition, the gas fuel processing unit 20 may be additionally installed with a mixer 27. The mixer 27 is branched downstream of the reformer 12 and branched downstream of the vaporizer, and the VOC reformed by the reformer 12 is vaporized by the vaporizer or the vaporized gas compressed by the vaporization gas compressor. After mixing with, it can be supplied to the main engine (ME) or the power generation engine (GE).

The control unit 30 includes the first and second VOC compressors 11a and 11b and the first and second heat exchangers 16a depending on whether the crude oil is shipped to the oil storage tank OT or whether the crude oil is transported after shipment. , 16b) can be controlled to start or shut down.

At this time, the control unit 30 may be connected to the first and second VOC compressors 11a and 11b and the first and second heat exchangers 16a and 16b by wire or wirelessly to control, and the VOC discharge line 13 The first and second VOC discharge lines 13a and 13b may be connected to a three-way valve formed at a branch location and controlled by wired or wireless connection.

Specifically, when the crude oil is shipped to the oil storage tank (OT), the control unit 30 controls a three-way valve to transfer a large amount of VOC generated in the oil storage tank OT from the VOC discharge line 13 to the first VOC discharge line. After controlling to be supplied to (13a), after compressing a large amount of VOC through the first VOC compressor (11a), heat exchange with seawater through the first heat exchanger (16a) and cooling, it is possible to control to reliquefy at least a part. .

In addition, the control unit 30 controls a three-way valve to discharge the second VOC from the VOC discharge line 13 by controlling a three-way valve when transporting crude oil after loading it into the oil storage tank OT. After controlling to be supplied to the line 13b, after compressing a small amount of VOC through the second VOC compressor 11b, heat exchange with the liquefied gas or the evaporated gas through the second heat exchanger 16b to cool, so that at least part of it is reliquefied. Can be controlled. At least some of the re-liquefied VOC may be supplied to the gas-liquid separator 17.

The driving according to the organic combination of each component of the VOC treatment system 1 according to the seventh embodiment of the present invention will be described below with reference to FIGS. 10A and 10B.

Figure 10 (a) is a flow chart of the VOC in the VOC treatment system according to the seventh embodiment of the present invention when the crude oil is shipped to the crude oil storage tank, and Figure 10 (b) is transported after loading the crude oil to the crude oil storage tank Si is a flow chart of VOC in the VOC treatment system according to the seventh embodiment of the present invention.

When the crude oil is shipped to the oil storage tank (OT), a larger amount of VOC is generated than the VOC generated in the process of transporting after completing the shipment of the crude oil to the oil storage tank (OT). A compressor and a heat exchanger (cooling device) capable of processing are required.

In addition, on the contrary, at the time of transporting the crude oil after the shipment of crude oil to the oil storage tank (OT) is completed, a very small amount of VOC is generated than that generated in the process of shipping crude oil to the oil storage tank (OT). A compressor and heat exchanger (cooling device) capable of processing VOC of

However, it occurs at the time of shipment of crude oil to the oil storage tank (OT) because the delivery time after completion of the shipment of crude oil to the oil storage tank (OT) is maintained longer than the time of shipment of crude oil to the oil storage tank (OT). When only a compressor and a heat exchanger capable of processing VOCs are provided, energy is very wasteful, the compressor is driven inefficiently, and there is a concern that energy for driving the heat exchanger is wasted.

Accordingly, in the present invention, the VOC compressor 11 for compressing VOC and the heat exchanger for cooling VOC are divided by processing capacity, and the types of compressors and heat exchangers that are driven according to the amount of VOC generated are different, thereby preventing the loss of consumed power. There is an effect that can consume optimized energy.

That is, in the embodiment of the present invention, the first VOC compressor 11a and the first heat exchanger 16a using seawater having a large amount of cold heat are driven at the time of shipping crude oil to the oil storage tank OT, Consumed by driving the second VOC compressor (11b) and the second heat exchanger (16b) using liquefied gas or evaporative gas having a small amount of cold heat at the time of transport after the shipment of crude oil to the oil storage tank (OT) is completed. There is an effect of preventing power loss and consuming optimized energy.

Specifically, looking at the flow of the solid line in (a) of FIG. 10, when the crude oil is shipped to the oil storage tank OT, a large amount of VOC is generated in the oil storage tank OT. At this time, the oil storage tank OT supplies VOC to the first VOC discharge line 13a through the VOC discharge line 13.

The VOC supplied to the first VOC discharge line 13a is supplied to the first VOC compressor 11a and compressed, and then supplied to the first heat exchanger 16a to receive cold heat from seawater and at least partially reliquefied.

At least some of the reliquefied VOCs are supplied to the gas-liquid separator 17 and separated into gaseous and liquid phases, and the gaseous VOCs are supplied to and consumed by other demanders (DE), and the liquid VOCs are supplied to and stored in the VOC storage tank 15. .

Here, seawater heat-exchanged with VOC can be discharged back to the sea.

In this way, a large amount of VOC generated when the crude oil is shipped to the oil storage tank (OT) can be mass-treated through the first VOC compressor (11a) and the first heat exchanger (16a), thereby improving the stability of the system. There is.

Looking at the flow of the solid line in (b) of FIG. 10, a small amount of VOC is generated in the oil storage tank OT when the crude oil is transported after loading it into the oil storage tank OT. At this time, the oil storage tank OT supplies VOC to the second VOC discharge line 13b through the VOC discharge line 13.

The VOC supplied to the second VOC discharge line 13b is supplied to the second VOC compressor 11b and compressed, and then supplied to the second heat exchanger 16b to receive cold heat from seawater and at least partially reliquefied.

At least some of the reliquefied VOCs are supplied to the gas-liquid separator 17 and separated into gaseous and liquid phases, and the gaseous VOCs are supplied to and consumed by other demanders (DE), and the liquid VOCs are supplied to and stored in the VOC storage tank 15. .

In this way, a small amount of VOC generated when transporting crude oil after loading it into the oil storage tank (OT) is less than the first VOC compressor 11a and the first heat exchanger 16a having a large amount of processing capacity. Since the branches can be processed through the second VOC compressor 11b and the second heat exchanger 16b, the power consumption of the system can be optimized and energy waste can be reduced.

Here, the liquefied gas or boil-off gas exchanged with the VOC is supplied to the gas fuel processing unit 20 and processed, and then used as fuel for the main engine (ME) or power generation engine (GE), or supplied from the VOC storage tank 15. It can be mixed and used as fuel for the main engine (ME) or power generation engine (GE).

11 is a conceptual diagram of a VOC treatment system according to an eighth embodiment of the present invention.

Referring to FIG. 11, the VOC treatment system 1 according to the eighth embodiment of the present invention is provided with a gas fuel liquefier 28 in place of the gas fuel treatment unit 20 when compared with the seventh embodiment. I can.

Hereinafter, the present embodiment will be mainly described in terms of differences compared to the previous embodiment, and portions omitted from the description will be replaced with the previous content. Note that this is the same in other embodiments below.

The gas fuel liquefier 28 may re-liquefy liquefied gas or boil-off gas through a refrigerant such as nitrogen, liquefied gas, R134a, or propane. Here, the liquefied gas refers to the heated and vaporized liquefied gas.

The gas fuel liquefier 28 receives heated boil-off gas or vaporized liquefied gas by exchanging heat with the compressed VOC through the second heat exchanger 16b, and through a refrigerant such as nitrogen, liquefied gas, R134a, propane, etc. Can be reliquefied.

The configuration and operation of the gas fuel liquefier 28 for re-liquefaction are already well known, so a detailed description thereof will be omitted.

Through the gas fuel liquefier 28 described above, the driving according to the organic combination of the respective components of the VOC treatment system 1 according to the eighth embodiment of the present invention is shown in FIGS. 11A and 11B. It will be described below.

Figure 11 (a) is a flow chart of the VOC in the VOC treatment system according to the eighth embodiment of the present invention when the crude oil is shipped to the crude oil storage tank, and Figure 11 (b) is transported after loading the crude oil to the crude oil storage tank Si is a flowchart of VOC in the VOC treatment system according to the eighth embodiment of the present invention.

In the eighth embodiment of the present invention, each of the VOC flows in Fig. 11 (a) and (b), that is, when the crude oil is shipped to the oil storage tank (OT) or the crude oil is transferred to the oil storage tank (OT) after completion of shipment. Since all the flows of VOCs in the city are the same as in the previous seventh embodiment, this will be replaced.

However, there is a difference in that the flow of the vaporized gas or the vaporized liquefied gas heated by heat exchange with the VOC compressed through the second heat exchanger 16b is supplied to the gas fuel liquefier 28 and consumed.

Due to this difference, in the embodiment of the present invention, the liquefied gas or boil-off gas heat-exchanged through the second heat exchanger 16b can be re-liquefied through the gas fuel liquefier 28, thereby reducing waste of boil-off gas or liquefied gas. This has the effect of optimizing the efficiency of using the system by preventing it.

12 is a conceptual diagram of a VOC treatment system according to a ninth embodiment of the present invention.

Referring to FIG. 12, in the VOC treatment system 1 according to the ninth embodiment of the present invention, the arrangement of the first and second VOC discharge lines 13a and 13b is different and the second 2 As the driving timing of the heat exchanger 16b is different, the flow of VOC changes differently, so this will be described mainly.

The third VOC discharge line 13c newly named here is a line that was included in the first and second VOC discharge lines 13a and 13b in the previous embodiment, but the first and second VOC discharge lines as in the previous embodiment. Please note that it is only newly named to easily explain the difference between (13a, 13b).

The first VOC discharge line 13a includes a first VOC compressor 11a and a first heat exchanger 16a, and may be connected to the second heat exchanger 16b.

The first VOC discharge line 13a may be connected to the VOC discharge line 13 connected from the oil storage tank OT, and when the crude oil is shipped to the oil storage tank OT, the VOC discharge line 13 A large amount of VOC can flow through the supply.

The second VOC discharge line 13b includes a second VOC compressor 11b and is connected to the second heat exchanger 16b.

The second VOC discharge line 13b may be connected to the VOC discharge line 13 connected from the oil storage tank OT, and the VOC discharge line 13 when transporting crude oil to the oil storage tank OT after completion of shipment. A small amount of VOC can flow through the supply of VOC.

The third VOC discharge line 13c connects the second heat exchanger 16b and the gas-liquid separator 17, and supplies at least partially reliquefied VOC to the gas-liquid separator 17 by heat exchange in the second heat exchanger 16b. I can.

In addition, in the embodiment of the present invention, the second heat exchanger 16b may be both operated when the crude oil is shipped to the oil storage tank OT or when the crude oil is shipped to the oil storage tank OT and then transferred.

As described above, in the ninth embodiment of the present invention, when the crude oil is shipped to the oil storage tank (OT), the second heat exchanger (16b) can additionally be used to cool a large amount of VOC, so that sufficient supply of the cooling medium is possible. There is an advantage in that the reliability of liquefaction is improved and the first heat exchanger 16a can be backed up.

Of course, it is difficult to completely back up the first heat exchanger 16a due to the limitation of the processing capacity, but backup is sufficiently possible during the maintenance or repair period of the first heat exchanger 16a.

For driving according to the organic combination of each component of the VOC treatment system 1 according to the ninth embodiment of the present invention through the first to third VOC discharge lines 13a, 13b, 13c described above, ( It will be described below through a) and (b).

Figure 12 (a) is a flow chart of the VOC in the VOC treatment system according to the ninth embodiment of the present invention when the crude oil is shipped to the crude oil storage tank, and Figure 12 (b) is transported after loading the crude oil to the crude oil storage tank Si is a flow chart of VOC in the VOC treatment system according to the ninth embodiment of the present invention.

Looking at the flow of the solid line in (a) of FIG. 12, when the crude oil is shipped to the oil storage tank OT, a large amount of VOC is generated in the oil storage tank OT. At this time, the oil storage tank OT supplies VOC to the first VOC discharge line 13a through the VOC discharge line 13.

The VOC supplied to the first VOC discharge line 13a is supplied to the first VOC compressor 11a and compressed, and then supplied to the first heat exchanger 16a to receive cold heat from seawater and at least partially reliquefied.

At least some of the reliquefied VOC may be additionally supplied to the second heat exchanger 16b to be further cooled, and thereby complete reliquefaction may be achieved.

The VOC reliquefied in the second heat exchanger (16b) is supplied to the gas-liquid separator (17) through the third VOC discharge line (13c) and separated into gaseous and liquid phases, and the gaseous VOC is supplied to and consumed by other consumers (DE). The liquid VOC is supplied to and stored in the VOC storage tank 15.

Here, seawater heat-exchanged with VOC can be discharged back to the sea.

In this way, a large amount of VOC generated when the crude oil is shipped to the oil storage tank (OT) can be mass-treated through the first VOC compressor (11a) and the first heat exchanger (16a), thereby improving the stability of the system. In addition, since it can be cooled through the second heat exchanger 16b, there is an effect of maximizing the reliquefaction performance of VOC and an effect of improving the reliquefaction reliability.

Looking at the flow of the solid line in (b) of FIG. 12, a small amount of VOC is generated in the oil storage tank OT when the crude oil is transported after loading it into the oil storage tank OT. At this time, the oil storage tank OT supplies VOC to the second VOC discharge line 13b through the VOC discharge line 13.

The VOC supplied to the second VOC discharge line 13b is supplied to the second VOC compressor 11b and compressed, and then supplied to the second heat exchanger 16b to receive cold heat from seawater and at least partially reliquefied.

At least partially reliquefied VOCs are supplied to the gas-liquid separator 17 through the third VOC discharge line 13c and separated into gaseous and liquid phases, and VOCs in the gaseous phase are supplied to and consumed by other demanders (DE), and the liquid VOCs are VOCs. It is supplied to and stored in the storage tank 15.

In this way, a small amount of VOC generated when transporting crude oil after shipping to the oil storage tank (OT) can be processed through the second VOC compressor 11b and the second heat exchanger 16b having a small amount of processing capacity, There is an effect of optimizing the power consumption of the system and reducing energy waste.

Here, the liquefied gas or boil-off gas exchanged with the VOC is supplied to the gas fuel processing unit 20 and processed, and then used as fuel for the main engine (ME) or power generation engine (GE), or supplied from the VOC storage tank 15. It can be mixed and used as fuel for the main engine (ME) or power generation engine (GE).

13 is a conceptual diagram of a VOC processing system according to a tenth embodiment of the present invention.

Referring to FIG. 13, the VOC treatment system 1 according to the tenth embodiment of the present invention is provided with a gas fuel liquefier 28 in place of the gas fuel treatment unit 20 when compared with the ninth embodiment. I can.

However, since this difference is the same as the difference from the previous eighth embodiment to the seventh embodiment, the configuration of the present embodiment and effects thereof can be sufficiently understood through the eighth embodiment, so the description of this embodiment will be omitted. .

14 is a conceptual diagram of a VOC processing system according to an eleventh embodiment of the present invention.

Referring to FIG. 14, in the VOC treatment system 1 according to the eleventh embodiment of the present invention, a gas-liquid separator (first gas-liquid separator 17a) is additionally constructed in contrast with the ninth and tenth embodiments. It is different, so let's focus on this.

The first VOC discharge line 13a includes a first VOC compressor 11a, a first heat exchanger 16a, and a first gas-liquid separator 17a, and may be connected to the second heat exchanger 16b.

The first VOC discharge line 13a may be connected to the VOC discharge line 13 connected from the oil storage tank OT, and when the crude oil is shipped to the oil storage tank OT, the VOC discharge line 13 A large amount of VOC can flow through the supply.

The first gas-liquid separator 17a is built on the first VOC discharge line 13a to temporarily store at least some reliquefied VOCs, and also separates at least partially reliquefied VOCs into gaseous and liquid phases, The gaseous VOC may be supplied to the second heat exchanger 16b again, and the liquid VOC may be supplied to the VOC storage tank 15.

The first gas-liquid separator 17a is used when crude oil is shipped to the oil storage tank OT, and can temporarily store a large amount of VOC as described above, and thus can serve as a flow buffer.

Since the second gas-liquid separator 17b is the same as the gas-liquid separator 17 described in the previous embodiment, a detailed description will be omitted.

As described above, in the eleventh embodiment of the present invention, by constructing the first gas-liquid separator 17a in addition to re-liquefying a large amount of VOC when shipping crude oil to the oil storage tank (OT), the flow rate required for processing a large amount of VOC Since it can act as a buffer, there is an advantage in that the reliability of processing VOC is improved.

Through the above-described configuration, the driving according to the organic combination of each of the components of the VOC treatment system 1 according to the eleventh embodiment of the present invention will be described below with reference to FIGS. 6A and 6B.

14 (a) is a flow chart of VOC in the VOC treatment system according to the eleventh embodiment of the present invention when the crude oil is shipped to the crude oil storage tank, and FIG. 14 (b) is the transport of crude oil after loading the crude oil storage tank Si is a flowchart of VOC in the VOC treatment system according to the eleventh embodiment of the present invention.

Looking at the flow of the solid line in (a) of FIG. 14, when crude oil is shipped to the oil storage tank OT, a large amount of VOC is generated in the oil storage tank OT. At this time, the oil storage tank OT supplies VOC to the first VOC discharge line 13a through the VOC discharge line 13.

The VOC supplied to the first VOC discharge line 13a is supplied to the first VOC compressor 11a and compressed, and then supplied to the first heat exchanger 16a to receive cold heat from seawater and at least partially reliquefied.

At least some of the re-liquefied VOC may be supplied to the first gas-liquid separator 17a to be temporarily stored, and at this time, it may be separated into a gas phase and a liquid phase.

The liquid phase separated in the first gas-liquid separator 17a is supplied to the VOC storage tank 15, and the separated gas phase is supplied to the second heat exchanger 16b for further cooling to be reliquefied.

The VOC reliquefied in the second heat exchanger (16b) is supplied to the second gas-liquid separator (17b) through the third VOC discharge line (13c) and separated into gaseous and liquid phases, and the gaseous VOCs are transferred to other demands (DE). It is supplied and consumed and the liquid VOC is supplied to the VOC storage tank 15 and stored.

Here, seawater heat-exchanged with VOC can be discharged back to the sea, and liquefied gas or evaporative gas heat-exchanged with VOC is supplied to the gas fuel processing unit 20 to be used as fuel for the main engine (ME) or power generation engine (GE) Can be used as

In this way, a large amount of VOC generated when crude oil is shipped to the oil storage tank (OT) can be mass-treated through the first VOC compressor (11a) and the first heat exchanger (16a), and at the same time, the first gas-liquid separator ( By temporarily storing a constant flow rate through 17a), there is an effect of preventing overload of each driving device, and an effect of improving the stability of the system is also generated, and additionally, cooling through the second heat exchanger 16b There is an effect of maximizing the reliquefaction performance of VOC and the effect of improving the reliquefaction reliability.

Looking at the flow of the solid line in (b) of FIG. 14, a small amount of VOC is generated in the oil storage tank OT when transporting crude oil after loading it into the oil storage tank OT. At this time, the oil storage tank OT supplies VOC to the second VOC discharge line 13b through the VOC discharge line 13.

The VOC supplied to the second VOC discharge line 13b is supplied to the second VOC compressor 11b and compressed, and then supplied to the second heat exchanger 16b to receive cold heat from seawater and at least partially reliquefied.

At least partially reliquefied VOCs are supplied to the second gas-liquid separator 17b through the third VOC discharge line 13c and separated into gaseous and liquid phases, and the gaseous VOCs are supplied to other demanders (DE) for consumption and liquid VOCs. Is supplied to the VOC storage tank 15 and stored.

In this way, a small amount of VOC generated when transporting crude oil after shipping it to the oil storage tank (OT) can be processed only through the second VOC compressor 11b and the second heat exchanger 16b having a small amount of processing capacity, There is an effect of optimizing the power consumption of the system and reducing energy waste.

Here, the liquefied gas or boil-off gas exchanged with the VOC is supplied to the gas fuel processing unit 20 and processed, and then used as fuel for the main engine (ME) or power generation engine (GE), or supplied from the VOC storage tank 15. It can be mixed and used as fuel for the main engine (ME) or power generation engine (GE).

As described above, the VOC treatment system 1 and the ship S according to the present invention have the effect of maximizing the treatment efficiency and energy consumption efficiency of VOC by changing the treatment configuration according to the generation time of VOC. .

15 is a conceptual diagram of a VOC treatment system according to a twelfth embodiment of the present invention.

Referring to Figure 15, the VOC treatment system 1 according to the twelfth embodiment of the present invention, an oil storage tank (OT), a gas fuel storage tank (GT), a VOC treatment unit 10, a gas fuel treatment unit 20 Includes. Hereinafter, the present embodiment will be described focusing on differences compared to the previous content.

The VOC processing unit 10 processes VOC generated in an oil storage tank OT storing oil such as crude oil and supplies it to a main engine ME or a power generation engine GE. To this end, the VOC processing unit 10 includes a VOC compressor 11, a gas-liquid separator 17, and the like.

The VOC compressor 11 compresses VOC. The VOC compressor 11 can compress VOC appropriately to the pressure required by the engine (ME, GE, DE), and the VOC output from the VOC compressor 11 according to the type of the engine (ME, GE, DE). The pressure may be 10 bar to 600 bar or the like.

The VOC compressor 11 may be a variable compressor, and a compression ratio may be varied according to the load of the engines ME, GE, and DE. That is, since the load of the engines ME, GE, and DE may be determined differently according to the ship speed that the ship S must pay, the VOC compressor 11 may adjust the pressure of the VOC in consideration of the required ship speed.

Or, for example, when the main engine (ME) is XDF, the required pressure is around 18bar, the required pressure of the power generation engine (GE) may be 10bar, and the required pressure of the boiler that is other demand (DE) may be 8bar, etc., so the VOC compressor ( 11) can control the compression of VOC in response to the required pressure of the engine (ME, GE, DE).

Unlike the drawing, a mixer 27 is provided upstream of the main engine (ME) and upstream of the power generation engine (GE), so that the main engine (ME) and the power generation engine (GE) are basically operated with gas fuel, In the case of a system in which VOC mixing is turned on/off by each engine (ME, GE, DE), it is determined whether the engine (ME, GE, DE) to which the VOC is delivered is the main engine (ME) or the power generation engine (GE). Accordingly, the compression ratio of the VOC compressor 11 may vary.

Unlike the above, the VOC compressor 11 may be a fixed compressor, and the VOC compressor 11 can compress VOC at a pressure lower than the required pressure (for example, 18 bar) of the main engine (ME) (for example, 7 to 10 bar). have.

Referring to the actual operation case, since the main engine (ME) was not operated at the maximum load, the fuel was compressed and consumed at a pressure less than the maximum required pressure, and even so, there was no problem in satisfying the MCR (Maximum Continous Rating). .

Therefore, the present invention provides the VOC by compressing and supplying the VOC according to the required pressure of the power generation engine (GE), etc., which has a lower required pressure than the main engine (ME), based on the data of the actual operation case. While saving, it can be made not to interfere with operation.

The gas-liquid separator 17 gas-liquid separates VOCs. VOCs are generally volatilized in the oil storage tank OT and discharged in a gaseous state, but as they are compressed in the VOC compressor 11, a phase change occurs due to an increase in pressure, and a liquid state may be mixed. Therefore, the gas-liquid separator 17 filters out the liquid phase contained in the VOC and ensures that only the gas phase is supplied to the engines (ME, GE, DE), etc., thereby ensuring engine (ME, GE, DE) efficiency.

For reference, liquid may be mixed into the VOC upstream of the VOC compressor 11, but in this case, a knock-out drum is disposed at the front end of the VOC compressor to separate the liquid phase, thereby causing the vapor phase in the VOC compressor 11. Can only flow in.

However, when oil is loaded in the oil storage tank OT, the ship S does not propel, so there is no operation of the main engine ME for propulsion. Accordingly, the gaseous VOC separated by the gas-liquid separator 17 may be returned to the oil storage tank OT, similarly to the liquid VOC to be described later.

The VOC discharge line 13 is connected from the oil storage tank (OT) to the gas-liquid separator 17, and the VOC discharge line 13 allows and controls the flow of VOC based on the internal pressure of the oil storage tank (OT). I can.

A VOC recovery line 171 may be provided in the gas-liquid separator 17, and the VOC recovery line 171 may recover liquid VOC separated by the gas-liquid separator 17 to the oil storage tank OT. The VOC compressor 11 may compress VOCs at 10 bar, for example, and in this case, the liquid VOC (LVOC) may be generated by about 6% in the gas-liquid separator 17.

The VOC recovery line 171 can be injected into the upper and/or lower ends of the oil storage tank OT, and the VOC compressed by the VOC compressor 11 flows into the internal space of the oil storage tank OT. The pressure drops and can be cooled by the Joule-Thomson effect.

Therefore, due to the return of LVOC, it is possible to slightly lower the internal temperature of the oil storage tank (OT), thereby suppressing the generation of VOCs. However, it is necessary to prevent the viscosity of the oil storage tank (OT) from increasing.The temperature of the route of the vessel (S) that stores the oil (30 degrees or more in the case of the equatorial route) and the oil filled in the oil storage tank (OT) Considering the amount (up to 98%), etc., a separate heating is not required despite the return of LVOC.

A CO2 adsorber 133 may be provided upstream of the VOC compressor 11 in the VOC discharge line 13. The CO2 adsorber 133 removes CO2 from the VOC and transfers it to a mixer 27 to be described later. That is, the VOC compressor 11 may compress VOC from which CO2 has been removed by the CO2 adsorber 133.

VOC is a component volatilized from oils such as crude oil, and as described above, heavy carbons (heavy hydrocarbons) such as propane and butane are the main components. However, the present invention intends to supply VOC to the engines (ME, GE, DE) together with gas fuel such as LNG, but the efficiency of the engines (ME, GE, DE) driven by gas fuel is controlled by the methane number, so the methane number is If a large amount of low VOC is introduced, there is a concern that the operating efficiency of the engines (ME, GE, DE) will decrease.

In addition, VOC is heat-exchanged with gas fuel and/or mixed and supplied to engines (ME, GE, DE). In this case, low-temperature corrosion may occur due to CO2 contained in VOC.

Accordingly, the present invention can slightly increase the methane number of VOCs mixed in gaseous fuel by adsorbing and removing CO2 from VOCs before compression, and also can solve the problem of low temperature corrosion in the heat exchanger 16 or the mixer 27. have.

Since the CO2 adsorber 133 can remove CO2 from the VOC using various methods currently known, the specific configuration of the CO2 adsorber 133 is not particularly limited. In addition, it goes without saying that the CO2 adsorber 133 may be configured to remove CO2 by a method other than adsorption despite the expression of terms.

The gas fuel processing unit 20 supplies gas fuel such as LNG to the engines ME, GE, and DE. In the present invention, in addition to gas fuel, VOC may be mixed and supplied to the engines (ME, GE, DE), and for this purpose, the gas fuel processing unit 20 includes a mixer 27.

The mixer 27 may mix VOC with gas fuel and supply it to engines (ME, GE, DE) mounted on the ship S. At this time, the VOC delivered to the mixer 27 may be a vapor phase VOC (SVOC) separated by the gas-liquid separator 17 described above.

The gaseous VOC flowing into the mixer 27 is compressed by the VOC compressor 11 and then gas-liquid separated, and after being mixed with gas fuel, it is in a state to have a temperature and pressure suitable for the engine (ME, GE, DE) if necessary. Can be supplied to engines (ME, GE, DE) after being adjusted.

To this end, the gas fuel processing unit 20 may include a gas fuel pump 21 or a gas fuel vaporizer 22, and the above configurations may be appropriately disposed upstream and/or downstream of the mixer 27.

The gas fuel processing unit 20 may include a gas fuel supply line 23 connected from the gas fuel storage tank GT to the mixer 27, and in the present invention, the engines ME, GE, DE are basically gas Considering that it is a fuel-operated type, the line from the mixer 27 to the engines ME, GE, DE may be referred to as a gas fuel supply line 23.

The line connected from the gas fuel storage tank GT to the mixer 27 is a gas fuel in the gaseous phase together with the gas fuel supply line 23 through which the liquid gas fuel flows or in place of the gas fuel supply line 23. It may include a boil-off gas supply line 26 through which the boil-off gas flows.

In this case, in consideration of the difference in methane number between liquid gas fuel and gaseous gas fuel, the mixing ratio of liquid and gaseous gas among gaseous fuels in addition to the mixing ratio of VOC will also be adjusted depending on the load of the engine (ME, GE, DE). I can. Therefore, the methane number of fuel flowing into the engine (ME, GE, DE) can be properly maintained.

As described above, in this embodiment, after the VOC is compressed, the SVOC is mixed with gas fuel and supplied to the engine (ME, GE, DE), and the LVOC is returned to the oil storage tank (OT), thereby suppressing the emission of VOC to the atmosphere. And reduce the use of gas fuel.

16 is a conceptual diagram of a VOC processing system according to a thirteenth embodiment of the present invention.

Referring to FIG. 16, the VOC processing system 1 according to the thirteenth embodiment of the present invention may have a different configuration of the VOC processing unit 10 as compared to the twelfth embodiment.

In this embodiment, the VOC processing unit 10 further includes a heat exchanger 16 and a VOC storage tank 15. The heat exchanger 16 cools VOCs generated in the oil storage tank OT. At this time, the refrigerant used by the heat exchanger 16 to cool the VOC is gas fuel, heat medium (glycol water, sea water, fresh water, etc.) used for vaporization of gas fuel, and/or fresh water for cooling used in the ship (S). And the like, but is not particularly limited. However, in the present embodiment, for convenience, the heat exchanger 16 cooling the VOC with gas fuel will be described.

The heat exchanger 16 heats and cools the VOC generated in the oil storage tank OT with gas fuel. To this end, the gas fuel supply line 23 may be branched from the gas fuel storage tank GT and connected to the heat exchanger 16 and the mixer 27, respectively.

Alternatively, unlike the drawing, the liquid gas fuel discharged from the gas fuel storage tank (GT) is delivered to the mixer 27 through the gas fuel supply line 23, mixed with VOC, and supplied to the engine (ME, GE, DE). The gaseous gas fuel evaporated in the gas fuel storage tank GT is transferred to the heat exchanger 16 through the boil-off gas supply line 26, and after heat exchange with VOC, the gas combustion device (GCU, not shown), etc. Can be burned by

That is, the gas fuel supply line 23 may be connected from the gas fuel storage tank GT to the mixer 27, and the boil-off gas supply line 26 may be connected from the gas fuel storage tank GT to the heat exchanger 16. .

In this case, the heat exchanger 16 may be provided downstream of the VOC compressor 11 to cool the VOC compressed to about 10 bar with gas fuel, and the temperature of the cooled VOC may be about -20 degrees Celsius. Of course, the temperature and pressure values of the VOC are not limited to the above.

The gas-liquid separator 17 is provided downstream of the heat exchanger 16 and can gas-liquid separating the cooled VOC, and the VOC is cooled and transferred to the gas-liquid separator 17 after the boiling point rises by compression. The liquefaction rate of can be increased. At this time, the gas-liquid separator 17 may recover LVOC to the oil storage tank OT and/or transfer it to the VOC storage tank 15.

The VOC storage tank 15 stores LVOC, which is a liquid VOC separated by the gas-liquid separator 17 after being cooled in the heat exchanger 16. Of course, when oil is loaded, the VOC storage tank 15 can also store SVOC, which is gaseous VOC separated by the gas-liquid separator 17.

The oil storage tank (OT) can accommodate other crude oil components in addition to the VOC to be volatilized, but since the VOC storage tank (15) only stores the heavy hydrocarbon components volatilized from oil, the VOC storage tank (15) is used to store VOCs. When mixed with gaseous fuel, control of the supply to the engines (ME, GE, DE) can be made easier.

A VOC storage line 151 may be connected from the gas-liquid separator 17 to the VOC storage tank 15, and a VOC supply line 152 is connected from the VOC storage tank 15 to the mixer 27. The VOC storage tank 15 may store liquid VOC, and the liquid VOC may be naturally vaporized due to factors such as heat penetration from the outside.

In this case, VOC vaporized in the VOC storage tank 15 may flow through the VOC supply line 152, and the liquid VOC remains in the VOC storage tank 15 and is recovered to the oil storage tank (OT) if necessary. , It may be vaporized through a separate heating source and transmitted to the mixer 27.

The VOC storage tank 15 can receive the low-temperature liquid VOC separated by the gas-liquid separator 17 after being supercooled in the heat exchanger 16, and in this case, additional evaporation in the VOC storage tank 15 is suppressed. The increase in pressure inside the VOC storage tank 15 can be minimized.

In this embodiment, gas fuel is delivered to the mixer 27 or supplied to the heat exchanger 16, and when the amount of gas fuel supplied to the heat exchanger 16 decreases, the VOC is less cooled, so that the gas-liquid separator 17 B The SVOC supplied from the VOC storage tank 15 to the mixer 27 increases.

Conversely, if the amount of gas fuel supplied to the heat exchanger 16 is reduced, the VOC is sufficiently cooled, so that the amount of SVOC supplied to the mixer 27 may be reduced.

That is, in this embodiment, the amount of gaseous fuel supplied to the heat exchanger 16 can be used to determine the amount of VOC flowing into the mixer 27. The flow of gaseous fuel toward the heat exchanger 16 is oil It may be controlled according to the amount of VOC generated in the storage tank OT, the load of the VOC compressor 11, the level of the VOC storage tank 15, and the internal pressure.

17 is a conceptual diagram of a VOC treatment system according to a fourteenth embodiment of the present invention.

Referring to FIG. 17, in this embodiment, unlike the thirteenth embodiment, gas fuel heated by VOC in the heat exchanger 16 may be transferred to the mixer 27. To this end, the gas fuel supply line 23 is connected to the mixer 27 via a heat exchanger 16.

In this case, the heat exchanger 16 can cool the VOC using liquid gas fuel, and in particular, the heat exchanger 16 can supercool the VOC using gas fuel and deliver it to the VOC storage tank 15 to be described later. have. At this time, the heat exchanger 16 may supercool the VOC to around -40 degrees Celsius.

When the VOC is supercooled, there is a concern that hydrate may be generated due to CO2 contained in the VOC, but this can be solved as CO2 in the VOC is removed by the CO2 adsorber 133 described above.

In this embodiment, liquid gas fuel may be used for cooling (subcooling) of the heat exchanger 16, and gaseous gas fuel evaporated in the gas fuel storage tank GT is provided by the boil-off gas supply line 26. It can be supplied to other demanders (DEs) such as auxiliary boilers or IGGs.

That is, gaseous gas fuel having a temperature slightly higher than that of liquid gas fuel can be provided to be consumed without heat exchange with VOC, and VOC can be cooled only with liquid gas fuel.

As described above, in this embodiment, since the low-temperature gas fuel discharged from the gas fuel storage tank GT can be heated with VOC, energy used for vaporization of the gas fuel can be reduced.

In addition, in this embodiment, by simultaneously cooling (subcooling) VOCs and storing them as LVOCs, the mixing flow rate of VOCs can be effectively adjusted to match the methane number to ensure engine operating efficiency (ME, GE, DE).

18 is a conceptual diagram of a VOC processing system according to a fifteenth embodiment of the present invention.

Referring to FIG. 18, in the VOC treatment system 1 according to the fifteenth embodiment of the present invention, engines ME, GE, and DE to which VOCs are supplied may be limited. As shown in the drawing, engines (ME, GE, DE) that receive VOC and gas fuel from the mixer 27 may be a power generation engine (GE), and the main engine (ME) provided for propulsion of the ship (S) is VOC. Gas fuel can be supplied without mixing.

When the main engine (ME) is XDF, the required methane number of the main engine (ME) may be 60MN or more. However, since the methane number of VOC is around 20 MN, when VOC is mixed with gaseous fuel, the methane number of fuel flowing into the main engine (ME) is insufficient, which may cause a problem.

Of course, in the previous embodiment, the methane number can be adjusted through the CO2 adsorber 133 and the supply of evaporative gas, which is a gaseous gas fuel having a high methane number, but considering that the supply amount of VOC is not uniform, it is introduced into the main engine (ME). The methane number of fuels can fluctuate.

Therefore, in this embodiment, in order to prevent the output of the main engine (ME) from shaking due to changes in the amount of VOC mixed by variables such as the storage amount of oil stored in the oil storage tank (OT) and the route temperature, the main engine (ME) Allows gaseous fuel alone to operate without VOC mixing.

To this end, the gas fuel supply line 23 and/or the boil-off gas supply line 26 may be branched upstream of the mixer 27 and connected to the main engine ME and the power generation engine GE, respectively. That is, the main engine (ME) is not provided downstream of the mixer (27), the power generation engine (GE) and other demands (DE), etc. may be disposed.

As such, this embodiment prevents VOC from being mixed with the gas fuel delivered to the main engine (ME) and is supplied only to the power generation engine (GE) and/or other demanders (DE), so that the output of the main engine (ME) is shaken. It can be suppressed to ensure the nautical stability of the ship (S).

19 is a conceptual diagram of a VOC processing system according to a sixteenth embodiment of the present invention.

Referring to FIG. 19, in the VOC treatment system 1 according to the sixteenth embodiment of the present invention, a VOC compressor 11 is provided in multiple stages, and an intercooler 111 may be provided between the VOC compressors 11.

The VOC compressor 11 may be provided in plural to compress VOCs in multiple stages, and in this case, the pressure of the VOC introduced into the gas-liquid separator 17 may be higher than the pressure in the previous embodiment. Accordingly, this embodiment can produce more LVOCs by increasing the boiling point of VOCs through additional compression of VOCs.

The intercooler 111 is provided between a plurality of VOC compressors 11 to cool VOCs. At this time, the refrigerant used by the intercooler 111 to cool the VOC is not limited, and gaseous fuel may be used as a refrigerant in the intercooler 111 as described in the heat exchanger 16 of the previous embodiment.

In this case, the gas fuel supply line 23 and/or the boil-off gas supply line 26 may be provided to pass through the intercooler 111 in the gas fuel storage tank GT, and then may be connected to the mixer 27. .

The intercooler 111 cools the VOCs firstly compressed by the VOC compressor 11 with gas fuel or the like, and recovers at least some of the cooled VOCs to the VOC storage tank 15. At this time, the VOC recovered to the VOC storage tank 15 may be LVOC, and the intercooler 111 may have a structure capable of performing functions of cooling and gas-liquid separation.

The VOC storage line 151 may be connected from the intercooler 111 to the VOC storage tank 15, and the intercooler 111 cools the VOC by exchanging gaseous fuel with VOC, and converts the liquid VOC out of the cooled VOC to VOC. It can be recovered with the storage tank 15.

At this time, the intercooler 111 may suppress the generation of SVOC by subcooling VOCs through gaseous fuel and recovering the VOCs in the VOC storage tank 15 in a subcooled state, as described in the heat exchanger 16 above.

In addition, the intercooler 111 may recover LVOC, which is at least a part of the cooled VOC, to an oil storage tank OT in addition to the VOC storage tank 15, and for this purpose, from the intercooler 111 to the oil storage tank OT. The VOC recovery line 171 may be connected.

As described above, in this embodiment, by providing the VOC compressor 11 in multiple stages, the recovery rate of LVOC in the gas-liquid separator 17 can be further increased, and the LVOC can also be recovered in the intercooler 111 provided between the VOC compressors 11. Therefore, even if a configuration for liquefying VOCs is not separately provided, the recovery efficiency of VOCs can be sufficiently improved.

20 is a conceptual diagram of a VOC treatment system according to a seventeenth embodiment of the present invention.

Referring to FIG. 20, in the VOC treatment system 1 according to the seventeenth embodiment of the present invention, a gas fuel treatment unit 20 includes a gas fuel vaporizer 22, a heat exchanger 16 and a gas fuel vaporizer ( 22) can be indirectly connected.

The gas fuel vaporizer 22 is provided on a gas fuel supply line 23 connected from the gas fuel storage tank GT to the mixer 27, and heats the gas fuel with a heat medium. The gas fuel vaporizer 22 may heat liquid (or gaseous) gaseous fuel discharged from the gas fuel storage tank GT by using various types of unrestricted fruit. For example, the fruit is seawater, steam, It may be glycol water or the like.

To this end, the gas fuel vaporizer 22 may be provided with a fruit supply unit 221 for supplying fruit. The fruit supply unit 221 may include a line for circulating the fruit (not shown), a fruit pump (not shown) for pumping the fruit, and a heat medium heater (not shown).

The heat exchanger 16 for cooling the VOC compressed by the VOC compressor 11 may use the heat medium of the gas fuel vaporizer 22. That is, one side of the heat medium circulation line is connected to the gas fuel vaporizer 22 and the other side is connected to the heat exchanger 16.

At this time, the heat medium is cooled while heating the gas fuel in the gas fuel vaporizer 22 and then flows into the heat exchanger 16 to cool the VOC. Therefore, in this embodiment, since the heat medium cooled by the gas fuel can be heated by heat exchange with the VOC, the heat medium heater can be omitted or minimized.

Of course, the heat medium supply unit 221 may appropriately adjust the load of the heat medium heater and/or the flow rate that flows into or bypasses the heat medium heater in the heat medium circulation line according to the flow rate at which the heat medium is supplied to the heat exchanger 16.

As described above, in this embodiment, energy saving can be realized by utilizing the heat medium used for vaporization of gaseous fuel when cooling VOC.

21 is a conceptual diagram of a ship including a VOC treatment system according to an 18th embodiment of the present invention.

Referring to FIG. 21, in the VOC treatment system 1 according to the eighteenth embodiment of the present invention, the VOC treatment unit 10 includes a VOC pump 154 and a VOC injector 1572.

The VOC pump 154 pressurizes VOCs generated in the oil storage tank OT. The VOC discharge line 13 may be connected from the oil storage tank OT to the VOC pump 154, and the VOC pump 154 pressurizes the VOC discharged along the VOC discharge line 13 in a gaseous or liquid phase to an appropriate pressure. do.

Alternatively, in this embodiment, the VOC compressor 11 may be used in place of the VOC pump 154. That is, since VOC is volatilized in a gaseous state in the oil storage tank (OT) and can be discharged through the VOC discharge line 13, the VOC discharge line 13 has all configurations capable of boosting the VOC in consideration of the state of the VOC. It is possible.

That is, the VOC pump 154 and the VOC compressor 11 may be provided at the same time, for example, a gas-liquid separator 17 is disposed in the VOC discharge line 13, and a VOC pump 154 in the downstream of the gas-liquid separator 17 And VOC compressors 11 are provided in parallel, and LVOC separated by the gas-liquid separator 17 may be transferred to the VOC pump 154 and SVOC may be transferred to the VOC compressor 11. For reference, the VOC pump 154 described below may be replaced with a VOC compressor 11 or a set of a VOC pump 154 and a VOC compressor 11.

The VOC injector 1572 returns the pressurized/compressed VOC into the oil storage tank OT. The pressure of the pressurized VOC may be 2 to 10 bar (for example, about 3 bar), and the VOC injector 1572 may return the pressurized VOC into the oil storage tank OT to realize the decompression of the VOC.

In particular, the VOC injector 1572 may inject VOC in the form of a spray into the oil storage tank OT, so that the injected VOC is cooled by reduced pressure to lower the oil temperature in the oil storage tank OT.

That is, the VOC injector 1572 is a spray that sprays the VOC pressurized by the VOC pump 154 into the oil storage tank OT, and the VOC injected at this time is as the pressure converges to the internal pressure of the oil storage tank OT. It can be cooled by the Joule-Thomson effect while depressurized. Accordingly, the amount of VOC generated in the oil storage tank OT can be suppressed by the returned and cooled VOC.

A VOC return line 157 may be connected to the VOC injector 1572 from the VOC pump 154 and the like, and a VOC return valve 1571 may be provided on the VOC return line 157. The opening degree of the VOC return valve 1571 may be adjusted according to the temperature and/or pressure of the oil stored in the oil storage tank OT.

For example, if it is determined that it is necessary to suppress the amount of VOC generated in the oil storage tank OT, the VOC return valve 1571 is sufficiently opened to pressurize the VOC through the VOC pump 154 and then by the VOC injector 1572 It can be sprayed in the oil storage tank (OT).

The VOC discharge line 13 described above may be branched upstream of the VOC pump 154 to be connected to a demand destination mounted on the ship S. At this time, the consumer may be a boiler, IGG, etc., and the VOC discharge line 13 may deliver VOC generated in the oil storage tank OT to a boiler or the like without pressurization.

To this end, the oil storage tank OT can increase the internal pressure to the required pressure of the boiler by accumulating VOC generated inside. That is, the VOC return valve 1571 may maintain an unopened state until the pressure inside the oil storage tank OT reaches a required pressure such as a boiler.

The oil storage tank OT may increase the internal pressure to 2bar to 3bar or more by accumulating VOC generated inside, for example. Of course, the internal pressure accumulated by the oil storage tank OT may vary depending on the required pressure of the boiler.

As described above, in this embodiment, VOCs generated in the oil storage tank OT are pressurized and then sprayed into the oil storage tank OT, thereby suppressing the generation of VOCs in the oil storage tank OT.

And/or this embodiment, by increasing the pressure of the oil storage tank (OT) to about 3 bar, supplying and consuming VOC in a free flow without compression, such as a boiler, it is possible to simplify the configuration for processing VOC.

22 to 24 are conceptual diagrams of a ship including a VOC treatment system according to a 19th embodiment of the present invention, and FIG. 25 is a conceptual diagram of a VOC treatment system according to a 19th embodiment of the present invention.

In FIGS. 22 to 24, the dotted line represents the VOC discharge line 13, the solid line represents the VOC return line 157, the dashed-dotted line represents the bunkering line BL, and the part marked in bold represents the part where the flow rate exists. .

The VOC treatment system 1 according to the present embodiment can block VOC emission at the source by performing bunkering by a bunkering line BL and simultaneously recovering VOCs for a plurality of oil storage tanks OT, and also VOC removal. There is no need to prepare separate equipment for it. It will be described in detail below.

In this embodiment, the VOC compressor 11 (which can be replaced by the VOC pump 154, of course) pressurizes VOC generated when oil is loaded into the oil storage tank OT. In the previous embodiment, while the VOC compressor 11 compresses VOCs generated from the oil storage tank OT already loaded with oil, in this embodiment, VOC compression may be performed simultaneously with bunkering.

Specifically, the VOC compressor 11 compresses VOC generated in the first oil storage tank OT being loaded as shown in FIG. 22 and delivers it to the second oil storage tank OT before loading. Hereinafter, the first and second numbers are assigned according to the bunkering order, but are not limited thereto. In addition, the second oil storage tank OT may mean a third or more than the second.

In the conventional case, a large amount of VOCs generated during bunkering were burned out or consumed unnecessarily. In this embodiment, VOCs are recovered and combustion of VOCs is not required.

In this embodiment, the VOC generated in the oil storage tank OT being loaded is transferred to the empty oil storage tank OT before loading. At this time, as the VOC is compressed by the VOC compressor 11 and transferred to the empty oil storage tank OT, it is supplied at a pressure higher than the internal pressure of the oil storage tank OT, but the oil storage tank into which VOC flows ( OT) is empty, so even if a high pressure VOC is introduced, the VOC can be decompressed by volume expansion, so there is no problem.

As shown in FIG. 23, the VOC compressor 11 compresses the VOC generated in the second oil storage tank OT when the second oil storage tank OT into which VOC has already been introduced is loaded, and the first oil storage tank Recover with (OT).

That is, the VOC generated in the loaded oil storage tank (OT) is transferred to the empty oil storage tank (OT), and when loading is performed in the oil storage tank (OT) that received the VOC, the VOC generated during the loading process is loaded at a certain level. (50 to 80% of the VOC is sufficiently absorbed as it is recovered into the oil) It can be recovered to the oil storage tank (OT) and/or another empty oil storage tank (OT) that has been completed.

Unlike when the first oil storage tank OT is loaded, the second oil storage tank OT is already filled with VOC, and the VOC may be mixed into the oil as the oil is loaded. Accordingly, the amount of VOC generated when the second oil storage tank OT is loaded may be less than the amount generated when the first oil storage tank OT is loaded.

Therefore, when the VOC compressor 11 is loaded into the oil storage tank OT after the second time, the amount of VOC to be treated is different when the VOC compressor 11 is loaded into the oil storage tank OT for the first time. Can be reduced.

VOCs generated in the second oil storage tank (OT) are compressed by the VOC compressor (11) and cooled using an intercooler (111), a VOC liquefier (14), etc., as needed, and the first oil storage tank (OT) Oil is recovered from inside.

That is, the VOC return line 157 connected from the VOC compressor 11 to the inside of the oil storage tank OT extends to the lower side of the oil storage tank OT, so that the recovered VOC can flow into the oil. . Through this, after the VOC is recovered, no VOC emission occurs again.

However, in this embodiment, unlike the drawings, the VOC return line 157 extends only to the upper inner side of the oil storage tank OT, and extends to the inner lower side of the oil storage tank OT, as in the embodiment described with reference to FIG. In order to utilize the bunkering line BL, a VOC delivery line (not shown) may be provided from the VOC discharge line 13 to the bunkering line BL.

In this case, in order to efficiently control the pressure and flow rate in the VOC delivery line, the VOC discharge line 13, and the VOC return line 157, a VOC compressor 11 may also be provided in the VOC delivery line, but VOC emission Specifications may be different from those provided on the line 13.

Of course, unlike the above, the VOC delivery line is provided to be branched from the VOC return line 157 at the downstream of the VOC compressor 11 to which the VOC discharge line 13 is connected, but may share the VOC compressor 11, but is not limited thereto. .

However, in this case, since a part of the bunkering line BL is used for VOC recovery, the oil storage tank OT in which the VOC is recovered into the oil may be limited to the bunkering completed.

In this embodiment, the VOC generated in the last loaded oil storage tank OT may be recovered by dividing into at least some of the remaining oil storage tanks OT, as shown in FIG. 24.

The last oil storage tank OT is filled with VOCs, and is absorbed by the oil as the oil is loaded, and some VOCs are recovered/absorbed into the oil loaded in the other oil storage tank OT.

Of course, even if the last oil storage tank (OT) is not loaded, when loading occurs in the new oil storage tank (OT) when there are more than one oil storage tank (OT) filled with oil above a certain level (the third oil storage tank ( OT)), VOC can be distributed and recovered after compression/cooling.

As described above, in this embodiment, even if all oil storage tanks OT are loaded, there is no process of discharging VOCs to the outside, and oil and LVOCs mainly exist inside the oil storage tank OT.

As shown in FIG. 25, in the VOC discharge line 13 and the VOC return line 157 where the VOC compressor 11 is provided, a pressure gauge (not shown), a flow meter (not shown), A sensor such as a thermometer (not shown) may be provided, and various valves (not shown) for implementing the control of the VOC flow rate may be controlled by the sensor.

That is, in this embodiment, the VOC continuously generated during shipment is pressurized by the VOC pump 154 or the VOC compressor 11, cooled to an appropriate temperature, and then transferred to an empty oil storage tank (OT) that has not yet been loaded. Separated and transferred, the transferred VOC is injected into the lower part of the oil storage tank (OT) in which an appropriate amount is loaded, and the VOC is reabsorbed in the oil.

In this embodiment, by repeating this process, all VOCs generated between shipments can be absorbed into oil at the end of the shipment, and thus, it is possible to respond to environmental regulations and reduce OPEX by blocking the emission of VOCs. .

26 is a conceptual diagram of a ship including a VOC treatment system according to a twentieth embodiment of the present invention.

Referring to FIG. 26, in the VOC treatment system 1 according to the twentieth embodiment of the present invention, when supplying VOC to engines (ME, GE), the methane number of VOC is required by the engines (ME, GE). Exhausts from engines (ME, GE) can be used to be prepared in case the conditions are not met.

The turbocharger 50 is provided in the engines ME and GE of this embodiment. In the turbocharger 50, the compression unit 50a and the turbine unit 50b are connected by a common shaft, and when the turbine unit 50b rotates by exhaust, the compression unit 50a rotates and compresses the scavenging air. to be.

At this time, the scavenging supply line 51 is connected to the intake manifold of the engine (ME, GE) through the compression part 50a, and conversely, the exhaust manifold of the engine (ME, GE) passes through the turbine part 50b. An exhaust discharge line 52 may be provided.

For engines (ME, GE) in which the turbocharger 50 is provided as described above, in order to reduce the ratio of nitrogen oxides contained in exhaust due to recent environmental regulations, an exhaust gas recirculation system (EGR: exhaust) that recirculates the exhaust into the cylinder. gas recirculation) is being used.

Such an exhaust gas recirculation system is configured to supply exhaust including an inert gas (carbon dioxide) together with scavenging air into the cylinder, thereby lowering the combustion temperature in the cylinder to suppress the generation of nitrogen oxides.

Such an exhaust gas recirculation system can be applied to this embodiment as well, and the exhaust gas recirculation system in this embodiment may be referred to as an exhaust circulation unit 53.

The exhaust circulation unit 53 of the present embodiment may supply exhaust air before and after the turbine unit 50b to the front and rear sides of the compression unit 50a to be mixed in a scavenging air. For example, in the upstream of the turbine unit 50b High-pressure exhaust circulation (HP EGR) for supplying high-pressure exhaust to the upstream or downstream of the compression unit 50a, or low-pressure exhaust circulation (LP) for supplying low-pressure exhaust from the downstream of the turbine unit 50b to the upstream of the compression unit 50a. EGR), etc. are possible.

To this end, the low pressure exhaust circulation line 531 is connected from the downstream of the turbine unit 50b to the upstream or downstream of the compression unit 50a, whereas the upstream or downstream of the compression unit 50a from the upstream of the turbine unit 50b. High-pressure exhaust circulation lines 531 and 532 may be connected, and each exhaust circulation line 531 and 532 includes a cooler (not shown), a filter (not shown), an exhaust recirculation valve 54 (EGR valve), etc. It is prepared.

Some of the exhaust circulating through the exhaust circulation unit 53 may join the VOC through exhaust delivery lines 531a and 532a, which will be described later.

In this embodiment, a VOC discharge line 13 may be provided from the oil storage tank OT to the engines ME and GE in order to supply VOC generated in the oil storage tank OT to the engines ME and GE. In addition, the VOC discharge line 13 is provided with a VOC compressor 11 and a mixer 56.

VOCs generated from oil storage tanks (OT) have calorific value, so they can be used as fuel for engines (ME, GE), but the types of engines (ME, GE) (main engines (ME, GE), power generation engines (ME, GE)) GE), etc.) or the load of the engine (ME, GE), the operating conditions, etc., the condition of the fuel required by the engine (ME, GE) may vary.Especially, when the fuel is gas, the methane number runs the engine (ME, GE) Will have a great influence on

In order to maintain stable operation while operating the engines (ME, GE) in gas mode, the methane number must be secured above a certain level. If only VOC is supplied, the methane number cannot be adjusted, so in the previous embodiment, liquefied gas and the like were mixed.

However, in the case of this embodiment, instead of separately mixing the liquefied gas or in addition to mixing the liquefied gas, an inert gas (carbon dioxide) may be used to efficiently control the methane number, and in particular, considering that a large amount of carbon dioxide is included in the exhaust, The methane number of VOC supplied to engines (ME, GE) can be adjusted by mixing exhaust with VOC.

To this end, a mixer 56 is provided between the oil storage tank OT and the engines ME and GE (for example, between the VOC compressor 11 and the engines ME and GE), and exhaust circulation lines 531 and 532 From the exhaust delivery lines 531a and 532a are connected to the mixer 56, and the exhaust delivery valve 55 is provided in the exhaust delivery lines 531a and 532a, the mixer 56 is in the exhaust circulation part 53 At least part of the circulating exhaust can be mixed with VOCs to control the methane number of VOCs and supply them to engines (ME, GE).

Specifically, the exhaust delivery lines 531a and 532a are provided with a low pressure exhaust delivery line 531a branched from the low pressure exhaust circulation line 531 or a high pressure exhaust delivery line 532a branched from the high pressure exhaust circulation lines 531 and 532 The exhaust delivery valve 55 provided in the exhaust delivery lines 531a and 532a may adjust the mixed flow rate of the exhaust according to the state of the engines ME and GE and the methane number of VOC.

That is, the exhaust delivery valve 55 can adjust the delivery flow rate of the exhaust so that the methane number meets the requirements of the engines (ME, GE) as the exhaust including carbon dioxide is mixed with the VOC, and for this purpose, the temperature or flow rate of the exhaust can be adjusted. Sensors to detect, methane number of VOCs, engine (ME, GE) requirements information reception configuration, etc. can be added.

As described above, in this embodiment, when VOC is compressed and supplied to the engines (ME, GE), but a certain amount of methane number is required to operate the engines (ME, GE) in a gas mode, at least one of the exhaust (carbon dioxide) circulating in the scavenging By mixing a part with VOC to control the methane number, it is possible to control the methane number even if there is no liquefied gas mixture, so it is possible to build a simple and efficient system.

27 is a conceptual diagram of a ship including the VOC treatment system according to the 21st and 22nd embodiments of the present invention.

Referring to Figure 27, the VOC treatment system 1 according to the twenty-first embodiment of the present invention, by mixing VOC and liquefied gas stored in the VOC storage tank 15 and the gas fuel storage tank (GT), respectively, the engine (ME , GE, DE) and a fuel processing unit (10, 20), a gas analyzer 232 and a control unit 30 supplied as fuel. Hereinafter, the present embodiment will be described mainly in terms of differences compared to the previous embodiment 5, and portions omitted from the description will be replaced with the previous content.

The fuel processing units 10 and 20 may satisfy the methane number required for each load from the engines (ME, GE, DE) by mixing liquefied gas with VOC at an appropriate ratio to prevent smooth combustion and knocking.

To this end, the fuel processing units 10 and 20 may include a VOC processing unit 10 that includes components used to process VOCs, and a gas fuel processing unit 20 that includes components used to process gas fuel. have.

The VOC processing unit 10 supplies VOC generated from the oil storage tank OT as fuel of the engines ME, GE, and DE mounted on the ship S. To this end, the VOC processing unit 10 may include a VOC compressor 11, a third heat exchanger 16c, a gas-liquid separator 17, and the like.

The third heat exchanger 16c cools the VOC supplied through the VOC supply line 152 at the rear end of the VOC compressor 11 with seawater supplied through the seawater pump 40, and converts the heat-exchanged VOC into a gas-liquid separator 17. Can be supplied with The seawater may be supplied through a seawater supply line using the seawater pump 40, and may be discharged to seawater after use. A thermometer may be provided in the VOC supply line 152 at the rear end of the third heat exchanger 16c to verify whether the temperature of the heat-exchanged VOC corresponds to the temperature required by the engines ME, GE, and DE.

The gas-liquid separator 17 may supply some of the liquefied VOC through heat exchange in the third heat exchanger 16c to the oil storage tank OT through the VOC recovery line 171, and the remaining VOCs are supplied to the VOC supply line ( 152) can be supplied to engines (ME, GE, DE). At this time, at the rear end of the gas-liquid separator 17 connected to the engines (ME, GE, DE), a filter (not shown) is disposed upstream of the mixing point of VOC and liquefied gas to remove impurities contained in VOC. have. In this case, a part of the VOC from the upstream of the filter may be supplied to the oil storage tank OT through the VOC recovery line 171.

The gas fuel processing unit 20 may mix the liquefied gas of the gas fuel storage tank GT with the VOC supplied to the engines ME, GE, and DE through the VOC supply line 152. A material in which VOC and liquefied gas are mixed in the gas fuel processing unit 20 may be referred to as fuel in the present specification.

A gas fuel supply line 23 may be provided from the gas fuel processing unit 20 to the engine (ME, GE, DE), and the gas fuel supply line 23 has the pressure of the fuel in the engine (ME, GE, DE). A pressure gauge 233 may be provided to verify whether it corresponds to the required pressure.

The gas analyzer 232, VOC supplied to the engines (ME, GE, DE) through the VOC processing unit 10 and the methane number before the liquefied gas mixed with the VOC through the gas fuel processing unit 20 are mixed with each other, respectively. Measure. As described above, in the present specification, the methane number may be interpreted as encompassing all specifications of the fuel such as components of the fuel or calories in addition to the Methane Number.

The control unit 30 controls the flow rate of the VOC and/or liquefied gas delivered to the mixing point of the VOC and the liquefied gas in the gas fuel processing unit 20 according to the measured methane value of the gas analyzer 232. Accordingly, the ratio of VOC and liquefied gas contained in the fuel generated by the gas fuel processing unit 20 may be adjusted by the control unit 30.

The control unit 30 may control the flow rate of VOC and/or liquefied gas delivered to the gas fuel processing unit 20 by various methods using a pump or a valve. As an example, at least one of the VOC processing unit 10 and the gas fuel processing unit 20 may be provided with a delivery valve for adjusting the flow rates of the VOC and the liquefied gas, respectively, and the control unit 30 controls the flow rate of the delivery valve. Can be adjusted. Preferably, pressure control valves 234a may be provided on the VOC supply line 152 of the VOC processing unit 10 and/or the gas fuel supply line 23 of the gas fuel processing unit 20, respectively, 30) can adjust the pressure of the pressure control valve (234a).

At this time, the control unit 30 controls the delivery valve, preferably the pressure control valve 234a, according to the measured value of the gas analyzer 232, so that the methane number of the fuel generated by the gas fuel processing unit 20 is determined by the engine (ME, GE, DE) can be tailored to the required level.

Upstream of the mixing point of the VOC and the liquefied gas, a VOC return line (not shown) for returning at least part of the VOC to the VOC storage tank 15 may be provided. At this time, a VOC return valve (not shown) as a return valve may be provided on the VOC return line (not shown).

Similarly/similarly, the gas fuel supply line 23 also has a gas fuel return line (not shown) for returning at least some of the liquefied gas discharged from the gas fuel storage tank GT upstream of the mixing point of the VOC and the liquefied gas. A gas fuel return valve (not shown) as a return valve may be provided on the gas fuel return line (not shown).

In this case, the control unit 30 controls the VOC return valve (not shown) and/or the gas fuel return valve (not shown) according to the measured value of the gas analyzer 232, and the VOC return valve (not shown) The flow rate of the VOC delivered to the engine (ME, GE, DE) and/or the flow rate of the liquefied gas delivered to the engine (ME, GE, DE) by a gas fuel return valve (not shown) are controlled by, The methane number of the fuel can be matched to the engine (ME, GE, DE).

Therefore, the controller 30 can actively control the flow rate at which the VOC and the liquefied gas are mixed by measuring the methane number of the VOC and the liquefied gas, respectively, before the VOC and the liquefied gas are mixed.

As described above, in this embodiment, the VOC that has been thrown into the atmosphere is used as fuel for the engines (ME, GE, DE), but the specifications of the fuel required by the engines (ME, GE, DE) (methane number, calories, components, etc.) In order to satisfy, liquefied gas is mixed with VOC and supplied to engines (ME, GE, DE), so that VOC can be reused while ensuring engine operation efficiency (ME, GE, DE).

Referring to Figure 27, the VOC treatment system 1 according to the 22nd embodiment of the present invention and the VOC treatment method using the same, in the VOC treatment system 1 according to the previous embodiment 21, the methane number of VOC and liquefied gas It provides a concrete structure for measuring each and a control method of the control unit 30 using the same. Hereinafter, the present embodiment will be described mainly in terms of differences compared to the previous embodiment 21, and portions omitted from the description will be replaced with the previous content.

The control unit 30 controls the flow rate of the VOC and/or the liquefied gas delivered to the mixing point of the VOC and the liquefied gas according to the measured value of the methane number of the gas analyzer 232 in the gas fuel processing unit 20. That is, the controller 30 controls the mixing ratio of VOC and liquefied gas.

The gas analyzer 232 may measure the methane number of VOC and liquefied gas, respectively, using gas chromatography, but it takes a measurement time. Therefore, if the system environment changes, such as a sudden change in the load of the engine (ME, GE, DE), there may be a delay in the control of the VOC and liquefied gas mixture ratio through the methane number measurement, and measures to reduce or prevent this Is required.

In the present embodiment, by storing and utilizing each methane number as a reference value before mixing the VOC and the liquefied gas, it is possible to reduce or prevent a delay that may occur when controlling the mixing ratio of the VOC and the liquefied gas.

Before mixing VOC and liquefied gas, measure the methane number and set the reference value. In the case of measuring the methane number of VOC and liquefied gas, respectively, VOC is upstream of the mixing point of VOC and liquefied gas, and the methane number is measured at the downstream of the gas-liquid separator 17, and the liquefied gas is upstream of the mixing point of VOC and liquefied gas. Measure the methane number at

The methane number of each of the VOC and the liquefied gas is measured periodically, preferably at intervals of several minutes to several hours, and stored in the control unit 30 as reference values for each of the VOC and the liquefied gas.

Based on the stored reference value, the control unit 30 calculates the methane number change of each VOC and liquefied gas according to the system environment change, and calculates the VOC and VOC for satisfying the specifications of the fuel required by the engines (ME, GE, DE). Calculate the mixing ratio of liquefied gas. Through this, the control unit 30 controls the flow rate of the VOC and/or the liquefied gas delivered to the mixing point of the VOC and the liquefied gas.

As described above, in this embodiment, in order to reduce or prevent delays that may occur when controlling the mixing ratio of VOC and liquefied gas, VOC is upstream of the mixing point of VOC and liquefied gas, and the methane number is measured in the downstream of the gas-liquid separator 17. The liquefied gas is used to meet the fuel specifications required by the engines (ME, GE, DE) by measuring the methane number upstream of the mixing point of the VOC and the liquefied gas, storing a reference value, and comparing it with the methane number change. By calculating the mixing ratio of VOC and liquefied gas, the mixing ratio can be quickly controlled.

In addition to the above-described embodiments, the present invention encompasses all embodiments generated by a combination of at least one embodiment and a known technology or a combination of at least two or more embodiments.

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, 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.

S: Ship OT: Oil storage tank
GT: gas fuel storage tank ME: main engine
GE: power generation engine, auxiliary engine DE: other demand
1: VOC treatment system 10: VOC treatment unit
11: VOC compressor 11a: first VOC compressor
11b: second VOC compressor 111: intercooler
12: reformer 13: VOC discharge line
13a: first VOC discharge line 13b: second VOC discharge line
13c: third VOC discharge line 131: flow meter
132: pressure gauge 133: CO2 adsorber
14: VOC liquefier 15: VOC storage tank
151: VOC storage line 152: VOC supply line
153: pressure gauge 154: VOC pump
155: auxiliary tank 156: flow meter
157: VOC return line 1571: VOC return valve
1572: VOC injector 158: VOC high pressure pump
159: VOC vaporizer 16: heat exchanger
16a: first heat exchanger 16b: second heat exchanger
16c: third heat exchanger 17: gas-liquid separator
17a: first gas-liquid separator 17b: second gas-liquid separator
171: VOC recovery line 20: gas fuel processing unit
21: gas fuel pump 22: gas fuel vaporizer
221: fruit supply unit 23: gas fuel supply line
231: flow meter 232: gas analyzer
233: pressure gauge 234a, 234b: pressure control valve
235: gas fuel return line 236: gas fuel return valve
24: gas fuel high pressure pump 25: gas fuel branch line
251: gas fuel heater 252: pressure control valve
26: boil-off gas supply line 27: mixer
28: gas fuel liquefier 30: control unit
40: sea water pump 50: turbocharger
50a: compression unit 50b: turbine unit
51: scavenging supply line 52: exhaust discharge line
53: exhaust circulation unit 531: low pressure exhaust circulation line
531a: low pressure exhaust delivery line 532: high pressure exhaust circulation line
532a: high pressure exhaust delivery line 54: exhaust recirculation valve
55: exhaust delivery valve 56: mixer

Claims (5)

VOC processing unit for supplying VOC generated in the oil storage tank provided on the ship to the engine mounted on the ship;
A gas fuel processing unit that mixes the liquefied gas of the gas fuel storage tank provided in the ship with VOC supplied to the engine;
A gas analyzer for periodically measuring the methane number of VOC and liquefied gas before mixing; And
The measured value of the methane number of VOC and liquefied gas before mixing is stored as a reference value, and the mixing ratio of the VOC and liquefied gas is calculated when the measured value of each methane number changes compared to the reference value, and the mixing point of the VOC and liquefied gas VOC treatment system, characterized in that it comprises a control unit for respectively controlling the flow rate of the VOC and liquefied gas delivered to. The method of claim 1,
The control unit is a VOC treatment system, characterized in that respectively controlling the flow rate of the VOC and liquefied gas so that the methane number of the mixture of VOC and liquefied gas meets the requirements of the engine. The method of claim 1,
At least one of the VOC processing unit and the gas fuel processing unit further comprises a delivery valve for adjusting the flow rate. The method of claim 3,
The control unit VOC treatment system, characterized in that to adjust the flow rate of the delivery valve. A ship comprising the VOC treatment system according to any one of claims 1 to 4.

Images