KR101757984B1 - Apparatus for purifying exhaust gas of vessel - Google Patents

Apparatus for purifying exhaust gas of vessel Download PDF

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KR101757984B1
KR101757984B1 KR1020150139286A KR20150139286A KR101757984B1 KR 101757984 B1 KR101757984 B1 KR 101757984B1 KR 1020150139286 A KR1020150139286 A KR 1020150139286A KR 20150139286 A KR20150139286 A KR 20150139286A KR 101757984 B1 KR101757984 B1 KR 101757984B1
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South Korea
Prior art keywords
separation tank
washing water
water
exhaust gas
separation
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KR1020150139286A
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Korean (ko)
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KR20170039998A (en
Inventor
박성진
윤승제
김인동
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주식회사 엔케이
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D50/008—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/185—Dust collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/037—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of inertial or centrifugal separators, e.g. of cyclone type, optionally combined or associated with agglomerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • Y02T10/20—

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention relates to an exhaust gas purifying apparatus for marine engines. The exhaust gas purification apparatus for a ship for purifying harmful substances of exhaust gas discharged from an engine of a ship according to an embodiment of the present invention includes a scrubber for injecting washing water into the exhaust gas to collect the harmful substances in the washing water, At least one cyclone separator for removing the sludge of harmful substances collected in the washing water by using the centrifugal force of the washing water discharged from the scrubber, At least one or more first pipes through which the washing water discharged from the separation tank flows, and at least one second pipe through which the washing water flows, A neutralizing agent is injected into the washing water to neutralize the washing water And second pipelines for delivering a portion of the neutralized wash water to the scrubber for recycling a portion of the neutralized wash water discharged from the at least one or more first pipelines.

Figure R1020150139286

Description

Technical Field [0001] The present invention relates to an apparatus for purifying exhaust gas of a ship,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas purifier, and more particularly, to a marine exhaust purifier.

Recently, the environmental regulations for the pollutants contained in the engine exhaust gas of ships have been strengthened, and researches on various post-treatment technologies and apparatuses for exhaust gas of engines have been actively conducted. For example, a device using a selective catalytic reduction (SCR) or a selective catalytic reactor (hereinafter referred to as an SCR device) as a post-treatment device for reducing nitrogen oxide (NO x ), which is a typical pollutant, ). The SCR apparatus is a device for reducing nitrogen oxides to N 2 by using a reducing agent such as NH 3 , CO, or hydrocarbons together with a catalyst, and urea water or ammonia water may be used as a solvent.

The solvent is stored in a predetermined storage tank and loaded on the vessel, and the solvent is sprayed in an appropriate amount to the exhaust gas supplied to the SCR apparatus, whereby nitrogen oxides contained in the exhaust gas are supplied to the inside of the SCR apparatus It can be decomposed by reacting with a catalyst and a reducing agent.

The solvent is required to have a large volume in order to meet a proper emission regulation. To this end, the storage tank of the solvent must have a large capacity, which not only lowers the space utilization of the hull, but also increases the weight and installation cost of the hull have.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a marine exhaust gas purifying apparatus capable of improving the space efficiency of the hull and reducing the weight of the hull to improve the fuel efficiency. Further, it is possible to provide an exhaust gas purifying apparatus for marine vessels having a high cost efficiency by reducing the installation cost of the SCR device. In addition, it is possible to provide a marine exhaust gas purifying apparatus for efficiently purifying exhaust gas as compared with the existing post-treatment apparatus.

According to an aspect of the present invention, there is provided an apparatus for purifying exhaust gas for a ship, the apparatus for purifying harmful substances of exhaust gas discharged from an engine of a ship. Wherein the exhaust gas purifying apparatus for a ship includes a scrubber for spraying clean water to the exhaust gas to collect the harmful substances in the cleansing water and a scrubber for removing harmful substances collected in the cleansing water by centrifugal force At least one cyclone separator for removing sludge, a separation device for separating the harmful substances collected in the washing water discharged from the cyclone separator into an oily substance and a particulate matter, removing the oily substance, At least one first pipe through which the washing water discharged from the separation tank flows, a neutralizer injecting device for neutralizing the washing water by injecting a neutralizing agent into the washing water flowing through the at least one first pipes, The neutralized < RTI ID = 0.0 > The may include a second pipe for passing a portion of the neutralized washing water to recycle a portion of the integer in the scrubber.

In one embodiment, the separation tank may include an oil separation filter for separating the harmful substances collected in the cleansing water into the oily material and the particulate matter. In one embodiment, the separation tank may include a first separation tank and a second separation tank installed at a rear end of the first separation tank. At least one of the first separation tank and the second separation tank may include an oil separation filter for separating the harmful substances collected in the washing water into the oily substance and the particulate matter. In one embodiment, the separation tank includes at least two separation membranes, the activated carbons are filled between the separation membranes, and the activated carbons can decompose the particulate matter of the harmful substance collected in the cleansing water. In one embodiment, the activated carbons may be partially replaced. In one embodiment, the at least two or more separation membranes may each include openings through which at least one of the wash water passes. Further, the openings may have different sizes.

In one embodiment, the openings of one of the at least two or more separating membranes and the openings of the other separating membrane may be aligned in one direction. In one embodiment, the size of the activated carbons may gradually decrease from the inlet of the separation tank to the outlet of the separation tank. In addition, the washing water can be introduced from the washing water mixed with the fresh water or seawater flowing in the water tank and the washing liquid injected from the washing liquid storage tank.

In one embodiment, it may further comprise an ozone injection device for injecting ozone into the washing water. The ozone injection device may be installed at a front end of the scrubber or at a rear end of the first pipes. In addition, the at least one cyclone separator may be installed in a series or parallel structure. In one embodiment, the sediment formed as the particulate material decomposes may remain on the bottom surface of the separation tank. In one embodiment, the remainder of the neutralized wash water that has not been transferred to the second tubing may be discharged to the exterior of the vessel, or may be delivered to other tubing.

According to the embodiment of the present invention, harmful substances such as sulfur oxides (SO x ), nitric oxides (NO x ) or particulate matter (PM) contained in the exhaust gas are continuously separated by the exhaust gas purifying apparatus for marine, . ≪ / RTI > Therefore, it can increase the space utilization of the hull as well as reduce the weight of the hull and minimize the loss of pressure compared with existing post-treatment equipment. In addition, it is possible to provide a marine exhaust gas purifying apparatus with a high economic efficiency by reducing the installation cost required for the existing post-treatment apparatus by the marine exhaust gas purifying apparatus.

Further, the oily material can be separately separated by the separation tank of the marine exhaust gas purification apparatus. In addition, the activated carbon can be selectively replaced by the separation membranes in the separation tank of the marine exhaust gas purification apparatus, so that the service life of the activated carbon can be extended as compared with the conventional tank in which the activated carbon is replaced all at once.

Also, the flow path of the washing water passing from the separation tank is made longer by the separation membrane including at least one opening having different sizes in the separation tank of the ship exhaust gas purification apparatus, so that the purification efficiency of the separation tank can be increased. Further, the washing water used in the marine exhaust gas purifying apparatus can be recycled through the second pipe, so that the purification cost can be reduced.

FIG. 1A is a flowchart of a marine exhaust gas purifying apparatus according to an embodiment of the present invention; FIG.
1B is a cross-sectional view of a first separation tank of a marine exhaust gas purifying apparatus according to an embodiment of the present invention;
1C is a cross-sectional view of a second separation tank of a marine exhaust gas purifying apparatus according to an embodiment of the present invention;
FIG. 1D is a sectional view of a second separation tank of a marine exhaust gas purifying apparatus according to another embodiment of the present invention; FIG.
FIG. 2A is a flowchart of a marine exhaust gas purifying apparatus according to another embodiment of the present invention; FIG. And
FIG. 2B is a cross-sectional view of a third separation tank of a marine exhaust gas purifying apparatus according to another embodiment of the present invention. FIG.

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following drawings, thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of any of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

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

FIG. 1A is a flowchart of a marine exhaust gas purification apparatus 1000 according to an embodiment of the present invention. Referring to FIG. 1A, a marine exhaust gas purification apparatus 1000 can purify harmful substances of exhaust gas S discharged from an engine of a ship. In one embodiment, the harmful substance of the exhaust gas (S) discharged from the engine of the ship is contacted with clean water mixed with clean water or seawater introduced from the water tank 10 and a cleaning liquid injected from the cleaning liquid storage tank 20 The exhaust gas S discharged from the selective catalytic reduction device 30 flows into the scrubber 100 and the harmful substances of the exhaust gas S can be collected in the washing water. The harmful substances of the exhaust gas (S) collected in the washing water can be separated or discharged by the ship exhaust gas purifying apparatus (1000). For example, harmful substances such as sulfuric acid (SO x ) and nitric oxide (NO x ) of exhaust gas (S), solid matters, sludge and oily substances can be collected in the washing water.

In one embodiment, before the exhaust gas S is introduced into the scrubber 100, the exhaust gas S may be introduced into a selective catalytic reduction device 30 comprising a catalyst layer for decomposing nitrogen oxides . The selective catalytic reduction unit 30 may be a selective catalytic reduction unit (SCR) or a selective catalytic reduction unit (SCR) including a catalyst layer for decomposing nitrogen oxides of the exhaust gas have. The selective catalytic reduction device 30 is a device for reducing nitrogen oxides to N 2 by using a reducing agent such as NH 3 , CO, or hydrocarbons together with a catalyst, and urea water or ammonia water may be used as a solvent. For example, the ammonia water or the urea water is stored in a predetermined storage tank provided in the vessel, and the ammonia water or the urea water is supplied to the selective catalytic reduction apparatus 30, The nitrogen oxide of the harmful substances contained in the exhaust gas (S) can be decomposed and reacted with the catalyst and the reducing agent provided in the selective catalytic reduction device (30). FIG. 1A illustrates a selective catalytic reduction device 30 disposed at the front end of the scrubber 100. FIG. It is to be understood that the present invention is not limited thereto.

According to the embodiment of the present invention, the marine exhaust gas purifying apparatus 1000 includes ozone (O 3 ) in cleansing water mixed with fresh water or seawater introduced from a water tank 10 and a cleaning liquid injected from a cleaning liquid storage tank 20, A scrubber 100 for collecting the harmful substances of the exhaust gas S into the washing water by injecting washing water into the exhaust gas S discharged from the selective catalytic reduction device 30; , At least one cyclone separator (200) for removing washing water discharged from the scrubber (100), which is the heaviest among the harmful substances collected in the washing water, A separating tank 300 for separating the pollutants collected in the tank 2 from the oily substance OL and the particulate matter PM and removing the oily substance OL to decompose the particulate matter PM, (Not shown) A neutralizer injection device 400 for injecting a neutralizer into the rinse water flowing through the at least one first pipes 500 to neutralize the rinse water, at least one or more first pipes 500 through which the rinse water flows, And a second pipe 600 for transferring a portion of the neutralized rinsing water to the scrubber 200 to recycle a portion of the neutralized rinsing water discharged from the first pipes 500.

The ozone injector 50 may be connected to the pipe of the washing water before it is supplied to the scrubber 100, which will be described later. The ozone injector 50 separates the washing water from the pipe through which the washing water flows, and then ozone (O 3 ) is injected into the washing water bypassed, and the washing water injected with ozone is mixed again with the pipe through which the washing water flows It can be operated in a side stream manner. In addition, the ozone injector 50 may be directly connected to the pipe through which the washing water flows, so that the ozone injector 50 can be directly operated. In another embodiment, the ozone injection device 50 for injecting ozone gas into the washing water may be provided at the rear end of the separation tank 300.

The scrubber 100 can introduce the ozone-infused cleansing water and spray the cleansing water. The sprayed cleansing water can be contacted with the exhaust gas (S) introduced into the scrubber (100). The harmful substances of the exhaust gas (S) brought into contact with the washing water can be collected in the washing water. In one embodiment, the higher the area of contact between the exhaust gas S and the washing water, the greater the amount of harmful substances in the exhaust gas S collected in the washing water, thereby improving the efficiency of the scrubber 100 . In one embodiment, the scrubbing water can be introduced at the top of the scrubber 100 so that the scrubbing water is sprayed from the top of the scrubber 100 to the bottom.

A spray plate 110 made of a porous plate is disposed on the upper part of the scrubber 100. The washing water is sprayed through openings formed in the spray plate 110 so that the washing water is discharged in the form of droplets or mist, Can be contacted. In one embodiment, the apertures of the spray plate 110 can be formed in various sizes or in various shapes. 1A illustrates a cross-section of openings having a circular shape of the spray plate 110. FIG. It is to be understood that the present invention is not limited thereto. In addition, the scrubber 100 may have a truncated cone shape having a narrow horizontal cross section. A buffer tank 120 may be installed below the spray plate 110. The freely falling cleansing water passes through the buffer tank 120 and the pressure of the cleansing water moving from the scrubber 100 to the cyclone separator 200 by the buffer tank 120 can be kept constant.

The cyclone separator 200 can primarily separate the harmful substances contained in the washing water discharged from the scrubber 100 by centrifugal force. The cyclone separator 200 can separate the sludge SG or the solid matter, which is relatively heavy by centrifugal force. In one embodiment, the sludge (SG) or the solids is separated into the lower part of the cyclone separator (200), which can be discharged and removed separately. FIG. 1A illustrates a ship exhaust gas purification apparatus 1000 having a cyclone separator 200 installed therein. It is to be understood that the present invention is not limited thereto. In one embodiment, at least two or more cyclone separators 200 may be installed in the ship exhaust gas purifying apparatus 1000 in a series or parallel structure to further increase the separation efficiency.

For example, when at least two or more cyclone separators 200 are connected in series, the cleansing water treated in the cyclone separator 200 at the front end is continuously connected, and then the cyclone separator 200 processes the exhaust gas S It is possible to maximize the separation efficiency of the sludge SG from the washing water in which harmful substances are collected. Further, when at least two or more cyclone separators 200 are connected in parallel, the speed at which the sludge SG separated from the washing water at the same time by the plurality of cyclone separators 200 is processed can be improved.

The washing water discharged from the cyclone separator 200 may be introduced into the separation tank 300. The separation tank 300 may include a first separation tank 300a and a second separation tank 300b-1 installed at a rear end of the first separation tank 300a. In one embodiment, the first separation tank 300a can separate the harmful substances collected in the cleansing water discharged from the cyclone separator 200 into particulate matter (PM) and oily substance (OL). The first separation tank 300a will be described later in detail with reference to FIG. 1B. In one embodiment, the second separation tank 300b-1 may have activated carbon disposed between at least two or more separation membranes and the at least two or more separation membranes. The harmful substances collected by the washing water from the activated carbon can be filtered. The second separation tank 300b-1 will be described later in detail with reference to FIG. 1C. In FIG. 1A, a first separation tank 300a and a second separation tank 300b-1 installed at the rear end of the first separation tank 300a are illustrated. It is to be understood that the present invention is not limited thereto.

In one embodiment, the cleansing water discharged from the separation tank 300 may contain nitrate (NO x ) trapped in the cleansing water in the form of ions substituted with nitrogen and oxygen. In addition, the washing water discharged from the separation tank 300 may be present in ionic form by replacing the sulfur oxides (SO x ) collected in the washing water with sulfuric acid and water. The cleansing water discharged from the separation tank 300 dissociates the hydrogen ions to lower the pH value and become acidic. Therefore, the washing water can be neutralized by the neutralizing agent injection device 400 to adjust the pH of the washing water. The washing water discharged from the separation tank 300 can flow through the first pipe 500 and the second pipe 600 separated from the first pipe 500.

In one embodiment, at least one pH measurement sensor may be installed in the two pipes branched from the first pipe 500 to measure the pH of the cleansing water discharged from the separation tank 300. 1A, a sensor 520 for measuring the pH of the washing water passing through one of the two pipes branched from the first pipe 500 through which a part of the washing water is discharged is connected to the front end of the neutralizing agent injecting apparatus 400, And is provided at the rear end. It is also illustrated that a sensor 540 for measuring the pH of the washing water passing through the second pipe 600 through which part of the washing water is recycled is provided at the front end and the rear end of the neutralizer injection device 440. Accordingly, the amount of the neutralizing agent to be injected into the washing water from the neutralizing agent injecting apparatus 400 can be calculated according to the pH of the washing water measured by the at least one sensor 520 or 540.

In one embodiment, a neutralizing agent may be injected into the cleansing water by an amount calculated in the neutralizing agent injecting apparatus 400 before discharging a part of the cleansing water to maintain the pH of the cleansing water at 6.5 or higher. The neutralizing agent may be a solvent having an alkaline (or basic) component which neutralizes a generally acidic solution. For example, sodium hydroxide (NaOH) may be used as the neutralizing agent.

The pH-adjusted cleansing water is moved from the first pipe 500 to the two branched pipes to discharge a portion of the pH-adjusted cleansing water, and a part of the pH-adjusted cleansing water is discharged through the second pipe 600 Can be recirculated. In one embodiment, a portion of the pH-controlled rinse water may be transferred to the scrubber 110 through the second line 600. The washing water moved through the second pipe 600 can be recycled to the ship exhaust gas purifying apparatus 1000. This can continuously purify the harmful substances contained in the exhaust gas (S), thereby further improving the efficiency of the exhaust gas purifying apparatus. In one embodiment, the remainder of the neutralized wash water that has not been transferred to the second pipe 600 may be discharged to the exterior of the vessel or may be delivered to other pipelines.

1B is a cross-sectional view of a first separation tank 300a of an exhaust gas purification apparatus 1000 for a ship according to an embodiment of the present invention. Referring to FIGS. 1A and 1B, cleansing water collected from the cyclone separator 200 of the ship exhaust gas purification apparatus 1000 may be introduced into the first separation tank 300a. In order to separate the harmful substances collected in the washing water discharged from the cyclone separator 200 into the particulate matter PM and the oily substance OL and to separate the sludge SG remaining in the washing water, The water separation filter 310 may be disposed inside the first separation tank 300a. The oil water separating filter 310 separates the washing water into particulate matter (PM) and oily substance (OL), and multiple filters for separately filtering the sludge (SG) remaining in the washing water are connected to the first separation tank 300a As shown in FIG. The oily substance OL is floated in the first separation tank 300a by the oil separation filter 310 and can be discharged separately. The sludge SG may be aggregated in the lower part of the first separation tank 300a and discharged separately.

1C is a sectional view of a second separation tank 300b-1 of an exhaust gas purification apparatus 1000 for a ship according to an embodiment of the present invention. The washing water containing the particulate matter PM discharged from the first separating tank 300a of the marine exhaust gas purifying apparatus 1000 is discharged to the second separating tank 300b- Lt; / RTI > The second separation tank 300b-1 may be installed at the rear end of the first separation tank 300a and may have a cylindrical shape extending in one direction. In one embodiment, at least two or more separation membranes 320 may be aligned in one direction inside the second separation tank 300b-1. The membranes 320 may be a permeable membrane having at least one or more openings TH through which the wash water is passed. In one embodiment, the size of the opening TH of the separation membranes 320 may be smaller than the size of the activated carbons AC so that the activated carbons AC to be described later can not pass through the separation membranes 320. The opening TH of the separation membrane 320 may be formed in various shapes. Fig. 1C illustrates openings TH in a circular shape. It is to be understood that the present invention is not limited thereto.

In one embodiment, activated carbons (AC) can be charged between the separation membranes 320 of the second separation tank 300b-1. Activated carbon (AC) in FIG. 1C is separated from activated carbon (AC1), activated carbon (AC2), and activated carbon (AC3), which are filled in the area separated by the separation membrane 320 from the lower end to the upper end of the second separation tank 300b- . Activated carbon (AC1, AC2, AC3) can filter the particulate matter (PM) of the collected harmful substances in the washing water. Also, the activated carbon (AC1, AC2, AC3) may be separated by the separator 320, respectively. In one embodiment, the size of the activated carbon may be the largest in size of the activated carbon AC1 adjacent to the lower end of the second separation tank 300b-1. In addition, the size of the activated carbon AC1 and the adjacent activated carbon AC2 may be smaller than the size of the activated carbon AC1. In addition, the size of the activated carbon AC3 adjacent to the upper end of the second separation tank 300b-1 may be the smallest. That is, the size of the activated carbon may gradually decrease from the inlet of the second separation tank 300b-1 to the outlet of the second separation tank 300b-1. For example, in the case of arranging activated carbons whose size gradually decreases toward the outlet of the separation tank, the activated carbons are arranged densely and densely so that the efficiency of filtering the washing water flowing from the bottom can be improved. Therefore, the largest size of activated carbon among the activated carbons is disposed adjacent to the inlet, and the smallest size of activated carbon among the activated carbons is disposed adjacent to the outlet, thereby further improving the cleaning efficiency of the washing water.

In one embodiment, the activated carbons AC1, AC2, and AC3, respectively, separated by the separators 320 may be partially replaced with unused fresh activated carbon. Therefore, the activated carbon can be selectively replaced by the second separation tank 300b-1 of the present invention, so that the service life of the activated carbon can be prolonged as compared with the conventional tank in which the activated carbon which is not separated is replaced at once . In one embodiment, at least one or more nozzles NZ disposed adjacent to the separation membranes 320 may be installed in the second separation tank 300b-1. At least one or more of the nozzles NZ may purge air from a lower portion of the second separation tank 300b-1 to an upper portion of the second separation tank 300b-1 by spraying air having a pressure of 2 bar to 5 bar The washing water can be discharged from the activated carbon (AC). For example, 2.5 bar of air from at least one or more nozzles NZ may be injected into the interior of the second separation tank 300b-1 about every 3 minutes.

In another embodiment, the washing water discharged from the first separation tank 300a flows into the second separation tank 300b-1 through the inlet provided at the upper portion of the second separation tank 300b-1, Can be discharged. At least one or more nozzles NZ disposed adjacent to the at least two separation membranes 320 are arranged at the upper portion of the second separation tank 300b-1 to the lower portion of the second separation tank 300b-1 at 2 to 5 bar may be injected at predetermined time intervals to discharge the purified washing water from the activated carbon (AC). For example, 2.5 bar of air from at least one or more nozzles NZ may be injected into the interior of the second separation tank 300b-1 about every 3 minutes. The washing water flowing in from the inlet provided on the upper portion of the second separation tank 300b-1 is accelerated by the gravity to the outlet provided in the lower portion of the second separation tank 300b-1, Can be discharged more quickly than the second separation tank 300b-1 having the second separation tank 300b-1. In one embodiment, the precipitate PP formed as the particulate matter PM remaining in the cleansing water is decomposed may remain on the bottom surface of the second separation tank 300b-1.

FIG. 1D is a sectional view of a second separation tank 300b-2 of an exhaust gas purifying apparatus 1000 for a ship according to another embodiment of the present invention. 1D is the same as the marine exhaust gas purification apparatus 1000 shown in FIG. 1A, except for the second separation tank 200b2, and thus a detailed description thereof will be omitted. Referring to FIGS. 1A and 1D, the washing water discharged from the first separation tank 300a of the ship exhaust gas purification apparatus 1000 may be introduced into the second separation tank 300b-2. The second separation tank 300b-2 may be installed at the rear end of the first separation tank 300a and may have a cylindrical shape extending in one direction. In one embodiment, at least two or more separation membranes 320 may be aligned in one direction inside the second separation tank 300b-2. The separator 320 may be a transmissive film including at least one or more first openings TH1 and at least one second opening TH2 having a different shape or different size from the first openings TH1. The size of the first openings TH1 and the second openings TH2 of the separation membranes 320 may be set to be less than the size of the activated carbons AC ). ≪ / RTI > In one embodiment, the first openings TH1 and the second openings TH2 of the separation membrane 320 may be formed in various shapes. FIG. 1D illustrates the first openings TH1 and the second openings TH2 in a circular shape. It is to be understood that the present invention is not limited thereto.

The first openings TH1 and the second openings TH2 of FIG. 1D are provided in multiple, the first openings of the separator 320 of the separators 230 TH1) and the second openings (TH2) of the separator (320) disposed immediately above can be aligned in one direction. For example, the first openings TH1 of one separator 320 filled with the activated carbon AC1 among the at least two separators 320 to be described later in FIG. 1D and the second openings TH1 of the other separator 320 (TH2) can be aligned in one direction. This is because the length of the flow path of the washing water passing through the activated carbon (AC) disposed between the separating membranes 320 is longer than that of the conventional tank having the separating membranes including the openings having a certain size, . According to the present invention, since the activated carbon (AC) can be selectively replaced by the second separation tank 300b-2, compared to the case where the activated carbon of the normal tank in which the charged activated carbon region is not separated is replaced at once, The service life can be prolonged.

In one embodiment, activated carbons (AC) can be charged between the separation membranes 320 of the second separation tank 300b-2. The activated carbons AC of FIG. 1D are separated from the bottom of the second separation tank 300b-2 by the separation membranes 320 from the bottom of the second separation tank 300b-2 to the activated carbon AC1 ), Activated carbon (AC2) and activated carbon (AC3). The activated carbon (AC1, AC2, AC3) can filter the collected harmful substances in the washing water and can decompose the particulate matter (PM). In addition, the activated carbons AC1, AC2, and AC3 may be separated by the separators 320, respectively.

In one embodiment, the size of the activated carbon may be the largest of the activated carbon AC1 adjacent to the lower end of the second separation tank 300b-2. In addition, the size of the activated carbon AC1 and the adjacent activated carbon AC2 may be smaller than the size of the activated carbon AC1. In addition, the size of the activated carbon AC3 adjacent to the upper end of the second separation tank 300b-2 may be the smallest. That is, the size of the activated carbon may gradually decrease from the inlet of the second separation tank 300b-2 to the outlet of the second separation tank 300b-2. For example, in the case of arranging activated carbons whose size gradually decreases toward the outlet of the separation tank, the activated carbons are arranged densely and densely so that the efficiency of filtering the washing water flowing from the bottom can be improved. Therefore, the largest size of activated carbon among the activated carbons is disposed adjacent to the inlet, and the smallest size of activated carbon among the activated carbons is disposed adjacent to the outlet, thereby further improving the cleaning efficiency of the washing water.

In one embodiment, each separated activated carbon (AC) can be partially replaced with unused fresh activated carbon. Therefore, the activated carbon can be selectively replaced by the second separation tank 300b-2 of the present invention, so that the useful life of the activated carbon can be prolonged as compared with the conventional tank in which the activated carbon is completely replaced with the activated carbon which has not been separated . In one embodiment, the second separation tank 300b-2 may be provided with at least one or more nozzles NZ disposed adjacent to the separation membrane 320. [ At least one or more of the nozzles NZ may purge the air having a pressure of 2 bar to 5 bar at a predetermined time from the lower part of the second separation tank 300b-2 to the upper part of the second separation tank 300b-2 The washing water can be discharged from the activated carbon (AC). For example, 2.5 bar of air from at least one or more nozzles NZ may be injected into the interior of the second separation tank 300b-2 about every 3 minutes.

In another embodiment, the cleansing water introduced from the first separation tank 300a is moved from the inlet provided at the upper portion of the second separation tank 300b-2 to the outlet provided at the lower portion of the second separation tank 300b-2 . The at least one or more nozzles NZ disposed adjacent to the separation membrane 320 may apply a pressure of 2 bar to 5 bar to the lower portion of the second separation tank 300b-2 from the upper portion of the second separation tank 300b- The cleaned water can be discharged from the activated carbon (AC) by spraying the air having a predetermined amount of time. For example, 2.5 bar of air from at least one or more nozzles NZ may be injected into the interior of the second separation tank 300b-2 about every 3 minutes. The cleansing water introduced from the inlet provided at the upper portion of the second separation tank 300b-2 is accelerated by the gravity to the outlet provided at the lower portion of the second separation tank 300b-2, Can be discharged more quickly than the second separation tank 300b-2 having the second separation tank 300b-2. In one embodiment, the precipitate PP formed by decomposing the particulate matter PM remaining in the cleansing water in the form of particles may remain on the bottom surface of the second separation tank 300b-2.

According to the embodiment of the present invention, harmful substances such as sulfur oxides (SO x ), nitric oxides (NO x ) or particulate matter (PM) contained in the exhaust gas are continuously separated by the exhaust gas purifying apparatus for marine, . ≪ / RTI > Therefore, it can increase the space utilization of the hull as well as reduce the weight of the hull and minimize the loss of pressure compared with existing post-treatment equipment. In addition, it is possible to provide a marine exhaust gas purifying apparatus with a high economic efficiency by reducing the installation cost required for the existing post-treatment apparatus by the marine exhaust gas purifying apparatus. Further, the oily material can be separately separated by the separation tank of the marine exhaust gas purification apparatus. In addition, the activated carbon can be selectively replaced by the separation membranes in the separation tank of the marine exhaust gas purification apparatus, so that the service life of the activated carbon can be extended as compared with the conventional tank in which the activated carbon is replaced all at once. Also, the flow path of the washing water passing from the separation tank is made longer by the separation membrane including at least one opening having different sizes in the separation tank of the ship exhaust gas purification apparatus, so that the purification efficiency of the separation tank can be increased. Further, the washing water used in the marine exhaust gas purifying apparatus can be recycled through the second pipe, so that the purification cost can be reduced.

2A is a flowchart of a marine exhaust gas purification apparatus 2000 according to another embodiment of the present invention. 2B is a sectional view of the third separation tank 300c of the exhaust gas purification apparatus 2000 for a ship according to another embodiment of the present invention. 2A and 2B are substantially the same as those of the ship exhaust gas purifying apparatus 1000 shown in Figs. 1A and 1B, except for the separating tank 300, and a detailed description thereof will be omitted.

Referring to FIG. 2A, the ship exhaust gas purifying apparatus 2000 includes ozone (O 3 ) gas to clean water mixed with fresh water or seawater introduced from a water tank 10 and a cleaning liquid injected from a cleaning liquid storage tank 20 A scrubber 100 for injecting ozone into the exhaust gas S discharged from the selective catalytic reduction device 30; a scrubber 100 for removing harmful substances from the scrubber 100; A separating tank 300 for separating the cleansing water separated by the cyclone separator 200 from the separation tank 300 for neutralizing the cleansing water discharged from the separating tank 300, A neutralizing agent injection device 400 for injecting a neutralizing agent and a second pipe 600 for recycling a part of the washing water discharged from the separation tank 300.

In one embodiment, the cleansing water separated by the cyclone separator 200 may be introduced into the separation tank 300. The separation tank 300 is composed of a third separation tank 300c. The third separation tank 300c is capable of separating the remaining particulate matter PM of the incoming washing water from the oily substance OL and is filled with activated carbon AC, The harmful substances may be filtered. The third separation tank 300c will be described later in detail with reference to FIG. 2B.

In one embodiment, the cleansing water discharged from the separation tank 300 may be present in an ionic form by replacing the nitrogen oxides (NO x ) captured in the cleansing water with nitrogen and oxygen. In addition, the washing water discharged from the separation tank 300 may be present in an ionic form by replacing the sulfur oxide (SO x ) collected in the washing water with sulfuric acid and water. The cleansing water discharged from the separation tank 300 dissociates hydrogen ions and becomes acidic. Therefore, the pH of the washing water is lowered, and the washing water can be neutralized by the neutralizing agent injecting apparatus 400 to adjust the pH. The washing water discharged from the separation tank 300 can be divided into two pipes.

In one embodiment, at least one pH measurement sensor may be installed in the two pipes branched from the first pipe 500 to measure the pH of the cleansing water discharged from the separation tank 300. 2A illustrates that a sensor 520 for measuring the pH of washing water passing through a pipe through which part of washing water is discharged is provided at the front end and the rear end of the neutralizer injection device 400. [ In addition, it is exemplified that a sensor 540 for measuring the pH of the washing water passing through a pipe through which part of the washing water is recirculated is provided at the front end and the rear end of the neutralizer injection device 400. Accordingly, the amount of the neutralizing agent to be injected from the neutralizing agent injecting apparatus 400 can be calculated according to the pH of the washing water measured by the at least one sensor 520, 540. The pH of the washing water can be maintained at 6.5 or more by injecting the neutralizing agent in an amount calculated by the neutralizing agent injecting apparatus 400 before discharging a part of the washing water. The neutralizing agent may be a solvent having an alkaline (or basic) component which neutralizes a generally acidic solution. For example, sodium hydroxide (NaOH) may be used as the neutralizing agent.

The pH-adjusted cleansing water is moved from the first pipe 500 to the two branched pipes to discharge a portion of the pH-adjusted cleansing water, and a part of the pH-adjusted cleansing water is discharged through the second pipe 600 Can be recirculated. In one embodiment, a portion of the pH-controlled rinse water may be transferred to the scrubber 110 through the second line 600. The washing water moved through the second pipe 600 can be recirculated to the ship exhaust gas purifying apparatus 2000. This can continuously purify the harmful substances contained in the exhaust gas (S), thereby further improving the efficiency of the exhaust gas purifying apparatus. In one embodiment, the remainder of the neutralized wash water that has not been transferred to the second pipe 600 may be discharged to the exterior of the vessel or may be delivered to other pipelines.

2B is a sectional view of the third separation tank 300c of the exhaust gas purifying apparatus 2000 for a ship according to the embodiment of the present invention. Referring to FIGS. 2A and 2B, the washing water separated by the cyclone separator 200 of the marine exhaust gas purifier 2000 may be introduced into the third separation tank 300c of the separation tank 300. Activated carbon (AC) charged between the water separation filter 310, the separation membrane 320 and the separation membrane 320 may be disposed in the third separation tank 300c. The oil water separating filter 310 can separate the particulate matter (PM) and the oily substance (OL) remaining in the washing water. The oil water separating filter 310 may be installed in one direction by providing multiple filters for separating the particulate matter (PM) and the oily substance (OL) of the incoming washing water. The oil water separating filter 310 may be installed in the lower part of the third separating tank 300c or the separating membrane 320 of the third separating tank 300c. For example, the third separation tank 300c may have a structure in which the water separation filter 310 and the separation membrane 320 are integrally formed. Therefore, the washing water can be filtered by the separation membrane while simultaneously separating the particulate matter and the oily material of the washing water by the oil separation filter.

In one embodiment, at least two or more separation membranes 320 may be aligned in one direction inside the third separation tank 300c. The separator 320 may be a transmissive film having at least one or more openings TH. The opening TH of the separation membrane 320 may be formed in various shapes. Figure 2B illustrates openings TH in a circular shape. It is to be understood that the present invention is not limited thereto. In one embodiment, activated carbons (AC) can be charged between the separation membranes 320 of the third separation tank 300c. Activated carbon (AC) in FIG. 2B illustrates activated carbon (AC1), activated carbon (AC2), and activated carbon (AC3) charged in a region separated by the separation membrane 320 from the lower end to the upper end of the third separation tank 300c do. Activated carbon (AC1, AC2, AC3) can filter the collected harmful substances in the washing water. Also, the activated carbon (AC1, AC2, AC3) may be separated by the separator 320, respectively. In one embodiment, the size of the activated carbon may be the largest size of the activated carbon AC1 adjacent to the lower end of the third separation tank 300c. In addition, the size of the activated carbon AC1 and the adjacent activated carbon AC2 may be smaller than the size of the activated carbon AC1. In addition, the size of the activated carbon AC3 adjacent to the upper end of the third separation tank 300c may be the smallest. For example, when a large size activated carbon is arranged from the bottom, the washing water flowing from the bottom can be filtered more densely by the activated carbons. In addition, the amount of the precipitate filtered by the activated carbon can be increased. Therefore, the arrangement of the activated carbons having different sizes can improve the cleaning efficiency of the washing water.

In one embodiment, each separated activated carbon (AC) can be partially replaced with unused fresh activated carbon. Therefore, the activated carbon can be selectively replaced by the third separation tank 300c of the present invention, so that the service life of the activated carbon can be prolonged as compared with a conventional tank in which charged activated carbon is replaced at a time. In one embodiment, at least one or more nozzles NZ disposed adjacent to the separation membrane 320 may be installed on the separation membrane 320 of the third separation tank 300c. The nozzle NZ injects the cleaned water from the lower part of the third separation tank 300c to the upper part of the third separation tank 300c at a pressure of 2 bar to 5 bar at a predetermined time interval, AC). For example, air having a pressure of 2.5 bar may be injected from the nozzle NZ every about three minutes.

In another embodiment, the cleansing water introduced from the third separation tank 300c can be moved from the inlet provided at the upper portion of the third separation tank 300c to the outlet provided at the lower portion of the third separation tank 300c. At least one or more nozzles NZ disposed adjacent to the separation membrane 320 are connected to the lower part of the third separation tank 300c at an upper portion of the third separation tank 300c and at a pressure of 2 to 5 bar It is possible to discharge purified water purified from the activated carbon (AC) by spraying at predetermined time intervals. For example, air having a pressure of 2.5 bar may be injected from the nozzle NZ every about three minutes. The washing water introduced from the inlet provided on the upper part of the third separation tank 300c can be discharged more quickly by the gravity to the outlet provided at the lower part of the third separation tank 300c. In one embodiment, the precipitate PP formed by decomposing the particulate matter PM remaining in the cleansing water in the form of particles may remain on the bottom surface of the third separation tank 300c.

According to the embodiment of the present invention, harmful substances such as sulfur oxides (SO x ), nitric oxides (NO x ) or particulate matter (PM) contained in the exhaust gas are continuously separated by the exhaust gas purifying apparatus for marine, . ≪ / RTI > Therefore, it can increase the space utilization of the hull as well as reduce the weight of the hull and minimize the loss of pressure compared with existing post-treatment equipment. In addition, it is possible to provide a marine exhaust gas purifying apparatus with a high economic efficiency by reducing the installation cost required for the existing post-treatment apparatus by the marine exhaust gas purifying apparatus. Further, the oily material can be separately separated by the separation tank of the marine exhaust gas purification apparatus. In addition, the activated carbon can be selectively replaced by the separation membranes in the separation tank of the marine exhaust gas purification apparatus, so that the service life of the activated carbon can be extended as compared with the conventional tank in which the activated carbon is replaced all at once. Also, the flow path of the washing water passing from the separation tank is made longer by the separation membrane including at least one opening having different sizes in the separation tank of the ship exhaust gas purification apparatus, so that the purification efficiency of the separation tank can be increased. Further, the washing water used in the marine exhaust gas purifying apparatus can be recycled through the second pipe, so that the purification cost can be reduced.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

1000, 2000, 3000; Exhaust gas purifier for ship
10; A water tank 20; Cleaning liquid storage tank
30; Selective catalytic reduction device 50; Ozone injector
100; Scrubber 200; Cyclone separator
300, 300a, 300b, 300c; Separation tank 400; Neutralizing agent injection device
500; First piping 520, 540; sensor
600; The second piping

Claims (16)

A ship exhaust gas purifying apparatus for purifying harmful substances of exhaust gas discharged from an engine of a ship,
A scrubber for spraying cleaning water into the exhaust gas to collect the harmful substances in the cleaning water;
At least one cyclone separator for removing the sludge of harmful substances collected in the washing water by centrifugal force from the washing water discharged from the scrubber;
A separation tank for separating the harmful substances collected in the washing water discharged from the cyclone separator into an oily substance and a particulate matter, removing the oily substance, and decomposing the particulate matter;
At least one first pipe through which the washing water discharged from the separation tank flows;
A neutralizing agent injection device for injecting a neutralizing agent into the washing water flowing through the at least one first pipes to neutralize the washing water; And
And second pipelines for delivering a portion of the neutralized wash water to the scrubber for recycling a portion of the neutralized wash water discharged from the at least one or more first pipelines,
Wherein the separation tank includes a first separation tank and a second separation tank installed at a rear end of the first separation tank,
Wherein the first separation tank comprises an oil separation filter for separating the harmful substances collected in the washing water into the oily substance and the particulate matter,
Wherein the second separation tank comprises at least two separation membranes, and the activated carbon is charged between the separation membranes, the activated carbon decomposes the particulate matter of the harmful substance collected in the cleansing water,
The size of the activated carbons gradually decreases from the inlet of the second separation tank to the outlet of the second separation tank,
And a plurality of nozzles disposed adjacent to the separation membrane, wherein the plurality of nozzles inject air having a predetermined pressure at a predetermined time in the second separation tank to discharge purified water from the activated carbon, Exhaust gas purifier. delete delete delete delete The method according to claim 1,
Wherein the activated carbon is partially replaceable. The method according to claim 1,
Wherein the at least two separation membranes each include openings through which at least one of the cleansing water passes. 8. The method of claim 7,
Wherein the openings have different sizes. 8. The method of claim 7,
Wherein the openings of one of the at least two separation membranes and the openings of the other separation membrane are aligned in one direction. delete The method according to claim 1,
Wherein the cleansing water is introduced from cleansing water mixed with clear water or seawater introduced from a water tank and a cleansing liquid injected from a cleansing liquid storage tank. The method according to claim 1,
Further comprising an ozone injection device for injecting ozone into the cleansing water. 13. The method of claim 12,
Wherein the ozone injection device is installed at a front end of the scrubber or at a rear end of the first pipes. The method according to claim 1,
Wherein the at least one cyclone separator is installed in a series or parallel structure. The method according to claim 1,
And the sediment formed by decomposition of the particulate matter remains on the bottom surface of the second separation tank. The method according to claim 1,
And the remainder of the neutralized washing water not transferred to the second pipe is discharged to the outside of the ship or is delivered to other pipelines.
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