KR101480435B1 - Combined exhaust gas cleaning system for ship - Google Patents

Abstract

The present invention relates to a novel exhaust gas cleaning system for a ship. According to the present invention, an operation for inert gas generation and supply into a cargo tank of the ship and an operation for simple exhaust gas purification can be carried out selectively. The present invention includes an exhaust gas treatment unit that is provided with exhaust gas generated from a ship in response to operations in an inert gas generation mode and an exhaust gas purification mode, cools and purifies the exhaust gas by using the seawater flowing in from a seawater duct, and generates inert gas or discharges the inert gas through desulfurization; an exhaust gas supply duct that is selectively provided with the inert gas or exhaust gas discharged from the exhaust gas treatment unit and guide the flow for discharge to the cargo tank of the ship or the atmosphere; a water treatment unit that is provided with and purifies the contaminated water which is used in the exhaust gas treatment unit for exhaust gas purification; and a monitoring unit that monitors the various states of the inert gas and the exhaust gas or the seawater in response to the operations in the inert gas generation mode and the exhaust gas purification mode.

Description

TECHNICAL FIELD [0001] The present invention relates to a combined exhaust gas treating apparatus for a ship,

The present invention relates to an apparatus for treating an exhaust gas generated from a ship, and more particularly, to an operation for generating an inert gas and providing it to a cargo tank of a ship, and an operation for purifying a simple exhaust gas selectively The present invention relates to a marine exhaust gas treating apparatus according to a new form.

In general, natural gas is a gas generated naturally underground and is a combustible gas composed mainly of hydrocarbons. Such natural gas is stored in a transportation vessel and is transported to a remote consumer site, and is usually stored in a liquid state LNG (Liquefied Natural Gad) or LPG (Liquefied Pertroleum Gas) in a cargo tank of an LNG carrier.

Here, the cargo tank is a tank for storing the LNG or LPG. In addition, recently, an apparatus for generating an inert gas is separately provided in the ship to provide an inert gas generated from the apparatus in the cargo tank, thereby preventing an explosion caused by the active gas when the natural gas is injected This is the same as that disclosed in Korean Patent Laid-Open No. 10-2010-0037506.

Such prior art techniques include cooling the exhaust gas from a ship boiler or an exhaust gas generated by a self-combustion facility such as an inert gas generator (IGG) with seawater to obtain an oxygen concentration requirement (for example, an oxygen concentration of 8% Or the like) to the cargo tank. That is, by providing an inert gas into the cargo tank, the concentration of the inert gas in the cargo tank is reduced to prevent the explosion by the active gas.

However, the above-described conventional technique is merely provided as a technique for generating an inert gas by using an exhaust gas and then using the inert gas. However, in order to treat an environmental pollutant generated during the process of generating an inert gas from the exhaust gas Goryeo was not done. Of course, in Korean Patent Laid-Open Publication No. 10-2012-0007683, there is provided a system for purifying exhaust gas, and various devices related thereto are provided on a ship.

However, since the above-described system for purifying the exhaust gas is provided in a separate space in a structure completely different from the apparatus for generating the above-mentioned inert gas, a separate purifying system is added to the apparatus for generating the inert gas There is a problem in that the entire facility space is secured and the installation cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve various problems of the prior art described above, and it is an object of the present invention to provide an apparatus for processing an exhaust gas used for generating an inert gas and driving an engine, a generator, The present invention provides a new type of marine exhaust gas treatment apparatus and a control method thereof, which can reduce the overall installation space and reduce the installation cost while allowing the operation to be selectively performed.

According to an aspect of the present invention, there is provided an exhaust gas treating apparatus for a marine vessel, comprising: an exhaust gas purifier for generating exhaust gas from a ship according to operation of an inert gas generating mode and an exhaust gas purifying mode, And an exhaust gas treatment unit for purifying the exhaust gas to generate an inert gas or desulfurizing the exhaust gas; An exhaust gas supply pipe for selectively receiving an inert gas or an exhaust gas discharged from the exhaust gas treatment unit and guiding the flow to be discharged to a cargo tank or air of the ship; A water treatment unit for receiving and cleaning the polluted water used for purifying the exhaust gas in the exhaust gas treatment unit; The monitoring unit monitors various states of the inert gas, the exhaust gas, and the seawater.

According to an embodiment of the present invention, the exhaust gas processing unit is connected to a branch piping communicating with the respective spaces so as to selectively receive exhaust gas generated from an engine, a generator, and a boiler of a ship.

According to another embodiment, the bypass pipe for guiding the exhaust of the exhaust gas generated from the engine, the generator, and the boiler of the ship to a place other than the exhaust gas processing unit is further included in the branch pipe of the exhaust gas processing unit have.

According to another embodiment, the exhaust gas supply pipe may further include a deck water seal for preventing reverse flow of the inert gas flowing from the exhaust gas processing unit to the cargo tank.

According to another embodiment of the present invention, the exhaust gas supply pipe further includes a PV breaker for protecting the cargo tank from a sudden pressure change in the cargo tank.

According to an embodiment of the present invention, the sea water line for supplying seawater into the exhaust gas treatment unit further includes a first valve for controlling the supply amount of seawater according to the discharge concentration of the exhaust gas identified through the monitoring unit.

According to another embodiment of the present invention, a guide pipe for guiding the flow to a space other than the cargo tank is further connected to the exhaust gas supply pipe, when the oxygen concentration of the inert gas discharged from the exhaust gas treatment unit is equal to or higher than a required value, And the third valve is further provided in the exhaust gas supply line. When the oxygen concentration of the inert gas discharged from the exhaust gas treatment unit is equal to or higher than the required value, the supply to the cargo tank .

According to another embodiment of the present invention, the exhaust gas processing unit is connected to a discharge pipe for supplying the contaminated water used for treating the exhaust gas to the water treatment unit, And a fourth valve and a fifth valve for determining the selective discharge flow of the polluted water are provided in the discharge pipe and the bypass pipe, respectively.

According to another embodiment of the present invention, the water treatment unit is further provided with a sixth valve for controlling the neutralized water supply amount according to the pH concentration of the polluted water discharged through the discharge pipe and the pH concentration of the incoming seawater .

According to another embodiment of the present invention, the water treatment unit includes a deaeration tank for removing suspended matters by aerating the polluted water discharged from the exhaust gas treatment unit with steam and compressed air, and a deaeration tank for storing suspended matters discharged from the deaeration tank And a sludge tank for storing the contaminants discharged from the hydrocyclone. The sludge tank may include a float tank, a hydrocyclone for removing sediments and contaminants from the deionized water discharged from the deionization tank, and a sludge tank for storing contaminants discharged from the hydrocyclone.

The monitoring unit may be configured to selectively control the flow of the inert gas or the exhaust gas according to the operation of the inert gas generating mode and the exhaust gas purifying mode.

The monitoring unit may include a gas monitoring unit for analyzing a component of a gas flowing along the exhaust gas supply line, and a polluted water monitoring unit and a neutralized water monitoring unit for analyzing seawater or the pH of contaminated water. The monitoring unit may further include a pressure monitoring unit for measuring a pressure of the inert gas supplied from the exhaust gas supply pipe into the cargo tank.

The exhaust gas treatment unit may further include an inert gas generator (IGG) for generating an inert gas through combustion of the diesel oil.

The exhaust gas supply line may further include a cooler and a dryer for cooling and drying the inert gas flowing along the exhaust gas supply line.

The ship exhaust gas treatment system of the present invention as described above can selectively perform the operation in the inert gas generation mode and the operation mode in the exhaust gas purification mode and the apparatus is configured as a single apparatus, And the cost of installation can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram for explaining an exhaust gas treating apparatus for a ship according to a preferred embodiment of the present invention; FIG.
FIG. 2 is a schematic diagram for explaining a marine exhaust gas treatment apparatus according to another preferred embodiment of the present invention
3 is a schematic configuration diagram for explaining a marine exhaust gas treatment apparatus according to another preferred embodiment of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a marine exhaust gas treatment apparatus of the present invention will be described with reference to FIGS. 1 to 3 attached hereto. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

As shown in the figure, the ship exhaust gas treating apparatus according to an embodiment of the present invention includes an exhaust gas treating unit 100, an exhaust gas supplying duct 200, a water treating unit 300, and monitoring units 410, 420, 430 and 440 . This will be described in more detail below for each configuration.

The exhaust gas processing unit 100 receives the exhaust gas generated from the ship according to the operation of the inert gas generating mode and the exhaust gas purifying mode, and the exhaust gas is cooled and purified by the seawater introduced from the sea water pipe 110, Or a scrubber for desulfurizing and discharging the exhaust gas.

Here, the exhaust gas includes exhaust gas generated by driving the engine 10, the generator 20, the boiler 30, etc. of the ship, and the generation of the inert gas according to the embodiment of the present invention Only the exhaust gas generated by the driving of the boiler 30 is used.

The exhaust gas processing unit 100 is connected to a branch piping 120 communicating with the respective spaces so as to selectively receive the exhaust gas generated from the engine 10, the generator 20 and the boiler 30 of the ship And a bypass pipe (120) for guiding the discharge of the exhaust gas generated from the engine (10), the generator (20) and the boiler (30) of the ship to a place other than the exhaust gas processing unit (100) 130).

That is, the exhaust gas generated in the engine 10, the generator 20, and the boiler 30 of the ship under the control of the control device (not shown) flows through the branch piping 120 to the exhaust gas processing section 100 When the operation of the exhaust gas processing unit 100 can not be performed due to the progress of the operation of the exhaust gas processing unit 100 or due to other reasons, the exhaust gas processing unit 100 can be operated at a place other than the exhaust gas processing unit 100 (For example, atmospheric air, etc.).

The seawater channel 110 connected to the exhaust gas treatment unit 100 is a channel for supplying seawater into the exhaust gas treatment unit 100. The seawater channel 110 is provided with a gas monitoring unit 410 And a first valve 510 for controlling the supply amount of the seawater according to the discharge concentration of the exhaust gas.

The exhaust gas supply line 200 selectively receives an inert gas or exhaust gas discharged from the exhaust gas processing unit 100 and guides the flow of the inert gas or exhaust gas discharged to the cargo tank 40 or the atmosphere of the ship. One end is connected to the gas outlet side of the exhaust gas processing part 100 and the other end is connected to communicate with the inside of the cargo tank 40. [

When the oxygen concentration of the inert gas discharged from the exhaust gas processing unit 100 is equal to or higher than the required value, the guide pipe 210 for guiding the flow to the space other than the cargo tank 40 is further connected And a second valve 520 for opening and closing the pipe is further provided in the guide pipe 210. In addition, a portion of the exhaust gas supply pipe 200, which is connected to the guide pipe 210, And a third valve 530 for selectively opening and closing the piping of the portion.

A blower 220 for blowing exhaust gas (or an inert gas) is installed in a front portion of the exhaust gas supply line 200 connected to the guide pipe 210. The exhaust gas supply line 200 further includes a deck water seal 230 for preventing reverse flow of the inert gas flowing from the exhaust gas processing unit 100 to the cargo tank 400 And a pressure vacuum breaker 240 for protecting the cargo tank 40 from an abrupt pressure change in the cargo tank 40 at a gas inflow side of the cargo tank 40.

The gas backflow prevention part 230 may be any one of a dry type, a semi-dry type, a wet type, and a semi-wet type.

Next, the water treatment section 300 is a site for purifying and treating the polluted water (spent seawater) used for purifying the exhaust gas in the exhaust gas treatment section 100 in a state suitable for discharging it to sea. The water treatment unit 300 includes a deionization tank 310, a floating tank 320, a hydrocyclone 330, and a sludge tank 340.

Here, the deaeration tank 310 is a site for aerating the polluted water discharged from the exhaust gas treatment unit with compressed air and / or steam to remove floating matters, and the floating tank 320 is connected to the deaeration tank 310 The hydrocyclone 330 separates and removes sediments and contaminants of the polluted water discharged from the deionization tank 310 by centrifugal force. The sludge tank 310 is a region for storing suspended solids discharged from the sludge tank 310, 340 is a site for storing contaminants discharged from the hydrocyclone 330.

In particular, the deairing tank 310 is connected to the exhaust gas processing unit 100 through a discharge pipe 140. The drain pipe 140 is a conduit for supplying the contaminated water used for the exhaust gas treatment of the exhaust gas treatment unit 100 to the deaeration tank 310 of the water treatment unit 300.

In addition, a bypass line 150 for bypassing the contaminated water is connected to the discharge line 140 according to a user's selection. That is, depending on the situation, the contaminated water may be discharged to a place (for example, a marine vessel or a separate polluted water treatment plant) directly through the bypass pipeline 150 or may be discharged through the discharge pipe line 140 So that the contaminated water can be supplied to the deaeration tank 310 constituting the tank 300.

Further, a fourth valve (540) for determining the selective discharge flow of the polluted water through the channel is further provided on the polluted water inflow side of the discharge pipe passage (140). On the polluted water inflow side of the bypass pipe A fifth valve (550) is further provided to determine the selective discharge flow of the contaminated water through the channel. At this time, when either one of the fourth valve 540 and the fifth valve 550 is open, the other is closed.

The water treatment unit 300 further includes a sixth valve 560 for controlling the neutralized water supply amount according to the pH concentration of the wastewater discharged through the discharge pipe 140. At this time, although the sixth valve 560 is located on the same conduit (seawater conduit) as the first valve 510, each of the sixth valves 560 is controlled in accordance with different settings, so that the openings of the conduits are controlled to be equal to each other But the opening amount may be controlled to be controlled differently from each other.

Next, the monitoring unit selectively controls the flow of the inert gas or the exhaust gas according to the operation of the inert gas generating mode and the exhaust gas purifying mode, and monitors the various states of the inert gas, the exhaust gas, As shown in FIG.

In the embodiment of the present invention, it is suggested that the above-mentioned monitoring units are provided in plural that perform different roles. That is, the monitoring unit includes a gas monitoring unit 410 for controlling the operation of the first valve 510 by analyzing a component of the gas flowing along the exhaust gas supply line 200, And a neutralization water monitoring unit 430 for controlling the operation of the sixth valve 560 based on the analysis result.

The monitoring unit may further include a pressure monitoring unit 440 for controlling the operation of the third valve 530 by measuring the pressure of the inert gas supplied from the exhaust gas supply line 200 to the cargo tank 40 And the pressure monitoring unit 440 may be further included in the embodiment of the present invention.

As described above, the ship exhaust gas treatment apparatus according to the embodiment of the present invention includes an IGG system mainly used for petroleum products, chemical products, and LNG / LPG carriers, an IGS (Inert Gas System) system used for crude oil carriers, and a water treatment unit Exhaust Gas Cleaning System (EGCS) (EGCS) can be installed on a single ship at the same time, so that they can be linked with each other, so that redundant construction of devices performing the same function can be omitted, And reduce the equipment cost.

Hereinafter, the operation of the ship exhaust gas treating apparatus according to the embodiment of the present invention will be described in more detail.

First, before the cargo is stored in the cargo tank 40 in the state where the ship is at rest, an operation is performed in an inert gas generation mode in which an inert gas is generated and then the inert gas is supplied into the cargo tank 40.

In this case, when the operation is performed in the inert gas generating mode, the exhaust gas processing unit 100 generates the inert gas while being supplied with the supply gas generated in the boiler 30, and the blower 220 is driven, The inert gas generated in the exhaust gas processing unit 100 is controlled to be supplied into the cargo tank 40 through the exhaust gas supply line 200. [

At this time, the gas monitoring unit 410 analyzes the component of the gas flowing along the exhaust gas supply line 200, and in the course of this, the gas monitoring unit 410 monitors the first valve Thereby controlling the operation of the microprocessor 510. That is, when the discharge concentration of the gas exceeds the set value, the amount of seawater supplied to the exhaust gas treatment unit 100 is increased by increasing the opening amount of the first valve 510.

On the other hand, the oxygen concentration is an important factor for the inert gas. That is, in the case of the inert gas provided to the inside of the cargo tank 40, the oxygen concentration must be less than the required value so that the explosion inside the cargo tank 40 can be stably prevented.

Accordingly, when the operation to the inert gas generating mode is progressed, the oxygen concentration of the inert gas flowing along the exhaust gas supply line 200 is continuously confirmed by the gas monitoring unit 410, When the oxygen concentration of the gas is equal to or higher than the required value, the third valve 530 is shut off and the second valve is opened so that the inert gas is prevented from being supplied into the cargo tank 40. If the oxygen concentration of the inert gas is less than the required value, the third valve 530 is opened and the second valve 520 is shut off so that the inert gas can be supplied into the cargo tank 40.

Depending on the situation, the contaminated water may be directly discharged to the corresponding place through the bypass pipe 150, or may be discharged after the water treatment of the contaminated water through the water treatment unit 300 is selectively performed.

When the storage of the cargo is completed with the inert gas being supplied into the cargo tank 40 through the above-described series of processes, the operation to the inert gas generation mode is terminated and the operation of the third valve 530 is controlled The gas supply from the exhaust gas supply line 200 to the cargo tank 40 is interrupted.

When the operation of the ship is completed after the storage of the cargo is completed, driving of the engine 10, driving of the generator 20, driving of the boiler 30, and the like are selectively performed. At the same time, The operation of the generator 20 and the operation of the boiler 30 are carried out in the exhaust gas purifying mode for processing the exhaust gas.

When the operation in the exhaust gas purifying mode is performed, the third valve 530 is kept closed, and the operation of the second valve 520 is maintained to be kept open so that the purified exhaust gas The fourth valve 540 is opened while the fifth valve 550 is closed and the exhaust gas is exhausted from the exhaust gas processing unit 100 through the guide pipe 210 without being supplied into the cargo tank 40. In addition, The discharged polluted water can not be directly discharged to the sea through the bypass pipeline 150, is provided to the water treatment unit 300, and then discharged in a purified state in the water treatment unit 300.

The water treatment unit 300 receives the polluted water discharged from the exhaust gas treatment unit 100 through the discharge pipe 140 and removes suspended matters from the deaeration tank 310 by aeration of steam and compressed air. And then supplied to the hydrocyclone 330 to separate the contaminants from the hydrocyclone 330 and then discharged to the sea. At this time, suspended matters filtered from the contaminated water in the deionization tank 310 are stored in the suspended tank 320, and sediments and contaminants filtered from the contaminated water in the hydrocyclone 330 are stored in the sludge tank 340 .

During the above process, the exhaust gas flowing along the exhaust gas supply pipe 200 is analyzed by the gas monitoring unit 410, and during the process, the exhaust gas component exceeds the set reference value The adjustment of the amount of seawater supplied through adjustment of the opening amount of the first valve 510 is performed.

In addition, the polluted water treated through the water treatment unit 300 is analyzed by the polluted water monitoring unit 420 for the pH, PAHs, and turbidity of the polluted water, and the seawater flowing into the exhaust gas treating unit 100 is analyzed by the neutralized water After the pH concentration is measured by the monitoring unit 430, the opening amount of the sixth valve 560 is controlled based on the pH level, so that the supply of seawater to the neutralized water is further controlled.

As a result, the operation in the exhaust gas purifying mode is continuously performed through the above-described series of processes, and therefore the polluted water discharged to the sea and the exhaust gas discharged to the atmosphere have a pH concentration and a composition suitable for environmental regulation So that it can be discharged.

Meanwhile, FIG. 2 of the accompanying drawings shows a marine exhaust gas treating apparatus according to another embodiment of the present invention.

According to another embodiment of the present invention, an inert gas generator (IGG) 610 for generating an inert gas through combustion of the diesel oil itself is further included in the exhaust gas treatment unit.

That is, as in the above-described embodiment, the generation of the inert gas is not performed by receiving the supply gas generated in the boiler 30, but by adding a separate inert gas generator 610, So that the operation can be proceeded to the fully distinguished inert gas generation mode.

At this time, the inert gas generator is composed of a burner which is provided in the exhaust gas treatment unit and can burn fuel oil, that is, diesel oil.

Further, it is further provided that the embodiment of the present invention further comprises a cooler and a drier for cooling and drying the inert gas flowing along the exhaust gas supply line to the exhaust gas supply line as shown in FIG.

That is, the cooling and drying of the inert gas can be additionally performed so that the risk of explosion, which may be caused by feeding a humid and inert gas into the cargo tank, can be prevented in advance.

As described above, the ship exhaust gas treating apparatus according to the present invention can selectively perform the operation in the inert gas generating mode and the exhaust gas purifying mode, and the apparatus can be configured as a single apparatus, And the reduction of the installation cost and the installation cost can be achieved.

On the other hand, in the ship exhaust gas treating apparatus according to the present invention, the ship is not limited to a ship for transporting natural gas.

For example, the vessel may be a vessel for transporting petroleum crude oil or a vessel for transporting LPG.

10. Engine 20. Generator
30. Boiler 40. Cargo tank
100. Exhaust gas treatment section 110. Sea water pipeline
120. Branch piping 130. Bypass pipe
140. As discharge pipe 150. Bypass pipe
200. Exhaust gas supply pipe 210. Guide pipe
220. Blower 230. Gas backflow prevention part
240. PV breaker 300. Water processor
310. Deaeration tank 320. Floating tank
330. Hydrocyclone 340. Sludge tank
410. Gas monitoring section 420. Pollution water monitoring section
430. Neutralization water monitoring section 440. Pressure monitoring section
510,520,530,540,550,560. Valve 610. Inert gas generator
620. Cooler 630. Dryer

Claims (15)

The exhaust gas generated from the ship is supplied according to the operation of the inert gas generating mode and the exhaust gas purifying mode, and the exhaust gas is cooled and purified by the seawater introduced from the sea water pipe to generate an inert gas or desulfurize the exhaust gas An exhaust gas processing unit for exhausting the exhaust gas;
An exhaust gas supply pipe for selectively receiving an inert gas or exhaust gas discharged from the exhaust gas treatment unit and guiding the flow to be discharged to a cargo tank or air of the ship;
A water treatment unit for receiving and cleaning the polluted water used for purifying the exhaust gas in the exhaust gas treatment unit; And
And a monitoring unit for monitoring various states of the inert gas and exhaust gas or seawater;
The exhaust gas processing unit is connected to a branch piping communicating with each space to selectively receive exhaust gas generated from an engine, a generator, and a boiler of a ship;
And a bypass pipe for guiding the discharge of the exhaust gas generated from the engine, the generator, and the boiler of the ship to a place other than the exhaust gas processing unit is further included in the branch pipe of the exhaust gas processing unit. Gas processing device.
delete delete The method according to claim 1,
Wherein the exhaust gas supply pipe further comprises a deck water seal for preventing reverse flow of an inert gas flowing from the exhaust gas processing unit to the cargo tank.
The method according to claim 1 or 4,
Wherein the exhaust gas supply line further comprises a PV breaker for protecting the cargo tank from an abrupt pressure change in the cargo tank.
The method according to claim 1,
Wherein the seawater pipe for supplying seawater into the exhaust gas treatment unit further comprises a first valve for controlling the supply amount of seawater according to the discharge concentration of the exhaust gas identified through the monitoring unit.
The method according to claim 1,
Wherein the exhaust gas supply pipe is further connected to a guide pipe for guiding the flow to a space other than the cargo tank when the oxygen concentration of the inert gas discharged from the exhaust gas treatment unit is equal to or higher than a required value;
Wherein the guide pipe further includes a second valve and a third valve is further provided in the exhaust gas supply pipe so that when the oxygen concentration of the inert gas discharged from the exhaust gas treatment unit is equal to or higher than a required value, So that the exhaust gas can be exhausted.
The method according to claim 1,
The exhaust gas processing unit is connected to a discharge pipe for supplying the polluted water used for treating the exhaust gas to the water treatment unit and a bypass pipe for selectively bypassing and discharging the polluted water is connected to the discharge pipe;
Wherein the exhaust pipe and the bypass pipe are respectively provided with a fourth valve and a fifth valve for determining a selective discharge flow of polluted water.
9. The method of claim 8,
Wherein the water treatment unit further comprises a sixth valve for controlling the neutralized water supply amount according to the pH concentration of the polluted water discharged through the discharge pipe and the pH concentration of the incoming seawater.
10. The method of claim 1 or 9,
The water-
A deaeration tank for removing suspended solids by aerating the polluted water discharged from the exhaust gas treatment unit with steam and compressed air,
A floating tank for storing suspended matters discharged from the deaeration tank,
A hydrocyclone for removing sediments and contaminants of the polluted water discharged from the deionization tank, and
And a sludge tank for storing contaminants discharged from the hydrocyclone.
The method according to claim 1,
Wherein the monitoring unit is configured to selectively control the flow of the inert gas or the exhaust gas according to the operation of the inert gas generating mode and the exhaust gas purifying mode.
The method according to claim 1 or 11,
The monitoring unit,
A gas monitoring unit for analyzing a component of the gas flowing along the exhaust gas supply line, and
And a neutralized water monitoring unit for monitoring the pH of the seawater or the contaminated water.
13. The method of claim 12,
Wherein the monitoring unit further comprises a pressure monitoring unit for measuring a pressure of an inert gas supplied from the exhaust gas supply pipe to the cargo tank. The method according to claim 1,
Wherein the exhaust gas treatment unit further comprises an inert gas generator (IGG) for generating an inert gas through combustion of the diesel oil. 15. The method of claim 14,
Wherein the exhaust gas supply line further comprises a cooler and a dryer for cooling and drying the inert gas flowing along the exhaust gas supply line.

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