KR20140123664A - METHOD OF De-PM, De-SOx, De-NOx OF EXHAUST GAS EMITTED FROM SHIP - Google Patents

METHOD OF De-PM, De-SOx, De-NOx OF EXHAUST GAS EMITTED FROM SHIP Download PDF

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KR20140123664A
KR20140123664A KR1020130040725A KR20130040725A KR20140123664A KR 20140123664 A KR20140123664 A KR 20140123664A KR 1020130040725 A KR1020130040725 A KR 1020130040725A KR 20130040725 A KR20130040725 A KR 20130040725A KR 20140123664 A KR20140123664 A KR 20140123664A
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washing water
ozone
water
nox
exhaust gas
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KR1020130040725A
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Korean (ko)
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KR101498007B1 (en
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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
    • 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
    • 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
    • B01D47/06—Spray cleaning
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/38—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ozone (O3) generator, e.g. for adding ozone after generation of ozone from air
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/04—Sulfur or sulfur oxides
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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

Abstract

The present invention relates to a method for removing contaminants in exhaust gas, which comprises: a mixing step which sprays washing water to exhaust gas so that SO_x, NO_x, PM, and unburned oil, contained in the exhaust gas entering a scrubber, can be adsorbed to the washing water; a PM and unburned oil separating step which makes the washing water flow in a purifier and separates PM and unburned oil from the washing water in the purifier; a NO_x removing step which removes NO_x adsorbed to the washing water by injecting ozone into the washing water; and a PH neutralizing step which injects a neutralizing agent into the washing water in order to neutralize the washing water whose acidity increases by adsorbed SO_x. Therefore, the provided method for removing PM, SO_x, and NO_x in the exhaust gas from a ship can continuously remove PM, SO_x, and NO_x contained in the exhaust gas by being adsorbed in a washing agent.

Description

선박의 배기가스 내 PM, SOx, NOx 제거 방법{METHOD OF De-PM, De-SOx, De-NOx OF EXHAUST GAS EMITTED FROM SHIP}TECHNICAL FIELD [0001] The present invention relates to a method for removing PM, SOx, and NOx in exhaust gas of a ship,

본 발명은 배기가스에 함유된 유해물질을 제거 하는 방법에 관한 것으로, 더욱 상세하게는 선박에 구비된 기관(Engine)으로부터 배출되는 유해물질인 PM, SOx, NOx를 제거하는 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing harmful substances contained in exhaust gas, and more particularly, to a method for removing harmful substances contained in ship exhaust gas, which removes PM, SOx and NOx, PM, SOx, and NOx.

현대사회의 급속한 산업화로 말미암아 화석연료의 사용량이 증가하였고, 연소과정에서 발생되는 유해물질로 인한 대기오염이 심각하다. Due to the rapid industrialization of modern society, the use of fossil fuels has increased, and the air pollution caused by harmful substances in the combustion process is serious.

대기오염의 주요 원인인 유해물질은 질소산화물(NOx), 황산화물(SOx), 미세분진(PM)이다. The main hazardous substances of air pollution are nitrogen oxides (NOx), sulfur oxides (SOx) and fine dust (PM).

환경보존에 대한 인식이 높아짐에 따라 배기가스의 배출규제가 엄격히 시행되고 있다. 특히, 선박 분야에서는 UN의 산하기관인 국제해사기구(IMO: INTERNATIONAL MARITIME ORGANIZATION)에서 선박으로부터 배출되는 배기가스에 함유된 NOx, SOx의 배출규제를 시행하고 있다. As the awareness of environmental preservation increases, exhaust emission regulations are strictly enforced. In particular, in the ship sector, the International Maritime Organization (IMO), an affiliate of the United Nations, implements regulations on the emission of NOx and SOx contained in exhaust gas emitted from ships.

선박의 배기가스 중 NOx를 제거하기 위한 기술로, SCR(SELECTIVE CATALYTIC REDUCTION)이 대표적이다. SCR은 촉매에 암모니아 또는 요소를 주입하여 NOx를 질소와 물로 변환시키는 기술이다. SCR (Selective Catalytic Reduction) is a typical technique for removing NOx from the exhaust gas of a ship. SCR is a technology that converts NOx to nitrogen and water by injecting ammonia or urea into the catalyst.

선박에서 배출되는 SOx를 제거하기 위한 기술은 습식과 건식으로 나눠지는데, 습식은 바닷물이나 알칼리 용액으로 황산화물을 제거하는 것이고, 건식은 수산화칼슘 또는 나트륨 계열의 흡수제를 사용하여 황산화물을 제거하는 것이다.Techniques for removing SOx from ships are divided into wet and dry processes. The wet process removes sulfur oxides from seawater or alkaline solutions, and the dry process removes sulfur oxides by using calcium hydroxide or sodium-based sorbents.

이러한, NOx와 SOx의 제거기술은 각기 개별적인 것으로, 연속적으로 제거기술을 선박에 적용하기 어려웠다.These technologies for removing NOx and SOx are each individual, and it has been difficult to continuously apply the removal technology to ships.

대한민국 등록특허공보 제10-1201426호(2012.11.14.)Korean Registered Patent No. 10-1201426 (November 14, 2012)

이에 상기와 같은 점을 감안하여 발명된 본 발명의 목적은, 유해물질인 PM, NOx, SOx의 제거기술이 연속적으로 이루어져, 선박 배기가스 중의 유해물질 처리가 용이한 PM, SOx, NOx 를 연속적으로 제거하는 제거 방법을 제공하는 것이다.SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention, which has been made in view of the above, to continuously remove PM, NOx and SOx, which are harmful substances, continuously to remove PM, SOx and NOx, which are easy to treat harmful substances in ship exhaust gas And to provide an elimination method for elimination.

상기와 같은 목적을 달성하기 위한 본 발명의 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법에 따르면, 스크러버로 유입된 배기가스에 함유된 SOx, NOx, PM, 미연 Oil이 세정수에 흡착되도록 배기가스에 세정수가 분무되는 혼합 단계와, 세정수가 정화기로 유입되고, 정화기에서 세정수 내 PM과 미연 Oil을 분리시키는 PM과 미연 Oil 분리단계와, 세정수에 오존을 주입하여 세정수에 흡착된 NOx를 제거하는 NOx제거단계와, SOx가 흡착되어 산도가 높아진 세정수를 중화시키기 위해서 세정수에 중화제를 주입하는 PH중화단계를 포함하는 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법을 제공한다.In order to achieve the above object, according to the present invention, there is provided a method for removing PM, SOx and NOx contained in ship exhaust gas so that SOx, NOx, PM and unleaded oil contained in exhaust gas flowing into a scrubber are adsorbed in washing water A step of separating PM and unburnt oil in the washing water from the purifier and flowing ozone into the washing water to remove the PM and unburned oil from the washing water; A NOx removing step of removing NOx, and a PH neutralization step of injecting a neutralizing agent into the washing water to neutralize the washing water whose SOx has been increased by the adsorption of SOx, to provide PM, SOx, and NOx removing methods contained in the ship exhaust gas do.

혼합 단계에서 청수 또는 해수가 스크러버로 공급되어 세정수로 사용될 수 있다. Fresh water or seawater can be supplied to the scrubber in the mixing stage and used as wash water.

PM과 미연 Oil 분리단계에서 세정수와 분리된 PM과 미연 Oil이 정화기와 연결된 배출탱크에 저장될 수 있다. In the separation step of PM and unleaved oil, PM and unleaded oil separated from the washing water can be stored in the discharge tank connected to the purifier.

NOx제거단계에서 세정수에 주입되는 오존은 세정수를 외부로 배출하기 위한 관로에 구비된 오존 발생기에서 발생될 수 있다.The ozone injected into the washing water in the NOx removing step may be generated in the ozone generator provided in the pipe for discharging the washing water to the outside.

관로에는 센서가 구비되어, 오존 발생기로부터 오존이 세정수로 주입되기 전과 후의 압력과 용존 오존을 측정할 수 있다.A sensor is provided in the pipeline to measure the pressure and dissolved ozone before and after the ozone is injected into the washing water from the ozone generator.

오존 발생기에는 오존을 관로로 주입시키기 위해 이젝터가 구비될 수 있다.The ozone generator may be provided with an ejector for injecting ozone into the channel.

PH중화단계에서 세정수에 주입되는 중화제는 PH센서에서 측정된 세정수의 산도에 비례하여 주입량이 결정될 수 있다.The amount of the neutralizing agent injected into the washing water in the PH neutralization step can be determined in proportion to the acidity of the washing water measured by the PH sensor.

관로에는 중화제를 세정수로 주입하기 위한 PH 믹서가 구비될 수 있다.The channel may be provided with a PH mixer for injecting the neutralizing agent into the washing water.

NOx제거단계 이후, 세정수를 스크러버로 재순환시켜 재분무 되도록 하는 세정수재순환단계를 더 포함할 수 있다.After the NOx removal step, the washing water may be recirculated to the scrubber so as to be re-sprayed.

세정수재순환단계에서 스크러버로 재순환되는 세정수(재순환 세정수)는 재순환 관로에 구비된 쿨러에 의하여 냉각될 수 있으며, 재순환수가 스크러버로 유입될 때, 오존발생기에서 발생된 오존이 관체를 통해 주입될 수 있다.The washing water (recirculating washing water) recirculated to the scrubber in the washing water recycling step can be cooled by a cooler provided in the recycling duct, and when the recirculating water flows into the scrubber, the ozone generated in the ozonizer is injected through the tube .

이러한 본 발명에 따른 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법에 의하면, 배기가스에 함유된 PM, NOx, SOx가 세정제에 흡착되어 연속적으로 제거되는 효과가 있다.According to the method for removing PM, SOx and NOx contained in ship exhaust gas according to the present invention, PM, NOx and SOx contained in the exhaust gas are adsorbed by the cleaning agent and are continuously removed.

세정수로 청수 및 해수가 사용되므로, 해수에 의한 부식이 방지된다.Since clear water and seawater are used as washing water, corrosion by seawater is prevented.

해수가 사용되므로, SOx를 제거하기 위한 흡수제의 사용이 배제되므로, 고가의 흡수제를 구입하기 위한 비용이 제거된다.Since seawater is used, the use of an absorbent to remove SOx is eliminated, eliminating the cost of purchasing an expensive absorbent.

세정수로 오존이 첨가되었으므로, 기존 해수에 비해 SOx와 반응이 더욱 활성화 되어 SOx의 제거가 향상된다.Since ozone is added as cleansing water, the reaction with SOx is more activated than conventional seawater, and SOx removal is improved.

세정수에 의해 배기가스 온도가 낮아지면, 오존의 열분해가 감소하기때문에, 잔존 오존이 더 많은 NOx와 반응함으로서 NOx 제거율이 향상 된다. 스크러버 하단에 버퍼탱크가 구비되어 세정수의 안정적인 공급과 맥동을 방지하게 되며, 세정수로 오존이 첨가된 선박 밸러스트(ballast) 수를 이용할 수 있다.
When the exhaust gas temperature is lowered by the washing water, since the thermal decomposition of ozone is reduced, the residual ozone reacts with more NOx, thereby improving the NOx removal rate. A buffer tank is provided at the lower end of the scrubber to prevent stable supply and pulsation of the washing water, and a ballast water containing ozone as washing water can be used.

도 1은 본 발명의 일 실시예의 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법의 절차도,
도 2는 도 1의 절차도에 따른 PM, SOx, NOx가 제거되는 상태의 개요도이다.1 is a flow chart of a method for removing PM, SOx, and NOx contained in ship exhaust gas of an embodiment of the present invention,
2 is a schematic diagram of a state in which PM, SOx, and NOx are removed according to the flowchart of FIG.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명하며, 이러한 실시예는 일례로서 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 여러 가지 상이한 형태로 구현될 수 있으므로, 여기에서 설명하는 실시예에 한정되지 않는다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

도 1은 본 발명의 일 실시예의 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법의 절차도이고, 도 2는 도 1의 절차도에 따른 PM, SOx, NOx가 제거되는 상태의 개요도이다.FIG. 1 is a flow chart of a method for removing PM, SOx and NOx contained in exhaust gas of a ship according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a state in which PM, SOx and NOx are removed according to the flowchart of FIG.

도 1에 도시된 바와 같이, 본 발명의 선박 배기가스에 함유된 PM, SOx, NOx 제거 방법은 스크러버(100)로 유입된 배기가스(G)에 함유된 SOx, NOx, PM, 미연 Oil이 세정수(W)에 흡착되도록 배기가스(G)에 세정수(W)가 분무되는 혼합 단계(S1)와, 세정수(W)가 정화기(200)로 유입되고, 정화기(200)에서 세정수(W)로부터 PM과 미연 Oil을 분리시키는 PM과 미연 Oil 분리단계(S2)와, 세정수(W)에 오존을 주입하여 세정수(W)에 흡착된 NOx를 제거하는 NOx제거단계(S3)와, SOx가 흡착되어 산도가 높아진 세정수(W)를 중화시키기 위해서 세정수(W)에 중화제를 주입하는 PH중화단계(S4)를 포함한다.1, the method for removing PM, SOx and NOx contained in ship exhaust gas according to the present invention is characterized in that SOx, NOx, PM, and unleaded oil contained in the exhaust gas G flowing into the scrubber 100 are cleaned A mixing step S1 in which the washing water W is sprayed to the exhaust gas G so as to be adsorbed to the water W and the cleaning water W are introduced into the purifier 200 and the purifier 200 (NO) removing step (S2) for separating PM and unleaded oil from the PM and the unleaded oil from the clean water (W), a NOx removing step (S3) for removing NOx adsorbed to the washing water W by injecting ozone into the washing water And a pH neutralizing step S4 of injecting a neutralizing agent into the washing water W to neutralize the washing water W having a high acidity due to SOx adsorption.

세정수(W)는 스크러버(100), 정화기(200), 오존 발생기(300), PH믹서(400)를 연결하는 관로(500)를 통하여 외부로 배출된다. The cleansing water W is discharged to the outside through a channel 500 connecting the scrubber 100, the purifier 200, the ozone generator 300, and the PH mixer 400.

관로(500) 내부에 흐르는 세정수(W)의 흐름을 원활히 하기 위해서 펌프를 관로(500)에 다수개 장착하여 세정수(W)의 유동압을 증가 시켰다.In order to smooth the flow of the washing water W flowing in the pipe 500, a plurality of pumps are installed in the pipe 500 to increase the flow pressure of the washing water W.

또한, 다수개의 밸브를 관로(500)에 장착하여, 유지를 위한 보수 시 세정수(W)의 흐름이 차단되도록 하였다.In addition, a plurality of valves are mounted on the channel 500 to block the flow of the washing water W during maintenance for maintenance.

혼합 단계(S1)에서는 배기가스(G)가 스크러버(100)에 유입되어 배기가스(G)에 함유된 SOx, NOx, PM, 미연 Oil이 세정수(W)에 흡착된다. In the mixing step S1, the exhaust gas G flows into the scrubber 100, and the SOx, NOx, PM, and unleavened oil contained in the exhaust gas G are adsorbed to the washing water W.

스크러버(100)는 그 측면에 배기가스(G)가 유입되는 유입구가 형성되어 있고, 스크러버 유입구보다 상부에 세정수(W) 유입관을 통해 세정수가 스크러버(100) 내부에 분무되도록 스크러버(100) 내부 수평 단면을 따라 노즐이 구비된다. The scrubber 100 is provided with an inlet through which the exhaust gas G flows into the side of the scrubber 100. The scrubber 100 is disposed above the scrubber inlet for spraying the washing water into the scrubber 100 through the inlet pipe for the washing water W. [ A nozzle is provided along the inner horizontal section.

유입관을 통해 공급되는 세정수(W)로는 민물인 청수 또는 바닷물인 해수가 단일 또는 혼합되어 사용될 수 있다. Fresh water (fresh water) or sea water (seawater) may be used singly or in combination as the washing water (W) supplied through the inlet pipe.

세정수(W)는 선박의 해수상자(Seachest)로부터 공급되는 담수, 기수 또는 해수가 선택적으로 혼합 사용됨으로서, 해수에 의한 스크러버(100), 정화기(200), 관로(500)의 부식을 방지하는 효과가 있다. 담수, 기수 또는 해수는 염분농도에 따른 구분된다.The cleansing water W is used to selectively prevent the corrosion of the scrubber 100, the purifier 200, and the channel 500 by seawater, fresh water, or seawater supplied from a seawater of the ship. It is effective. Freshwater, brackish water or seawater are classified according to their salt concentration.

노즐로부터 세정수(W)가 스크러버(100)로 유입된 배기가스(G)를 향해 분무되어 배기가스(G)에 포함된 오염물질인 SOx, NOx, PM, 미연 Oil과 접촉하게 되며, 그로써 세정수(W)에 흡착되어 자유낙하 한다.The washing water W is sprayed toward the exhaust gas G flowing into the scrubber 100 from the nozzle and brought into contact with the contaminants SOx, NOx, PM and unburnt oil contained in the exhaust gas G, Adsorbed on the water W and falls freely.

PM과 미연 Oil 분리단계(S2)에서는 세정수(W)가 정화기(200)로 유입되어 PM과 미연 Oil이 세정수(W)와 분리되는 단계이다.In the PM and unleaved oil separation step S2, the washing water W flows into the purifier 200 to separate the PM and the unleaded oil from the washing water W.

스크러버(100)는 하부로 갈수록 수평단면이 좁아지는 원뿔대 형상이다. 그 아래에는 버퍼탱크(110)가 구비되고, 자유낙하 한 세정수(W)가 버퍼탱크(110)를 통과하는데, 버퍼탱크에 의해 스크러버(100)로부터 관로(500)를 통해 정화기(200)로 흐르는 세정수(W)의 압력이 일정하게 유지된다.The scrubber 100 has a truncated cone shape with a horizontal cross section becoming narrower toward the bottom. A buffer tank 110 is provided under the buffer tank 110. The cleansing water W that has fallen freely passes through the buffer tank 110 and is discharged from the scrubber 100 through the pipeline 500 to the purifier 200 The pressure of the flowing washing water W is kept constant.

정화기(200)에는 세정수(W)로부터 PM과 미연 Oil을 분리하기 위한 필터(210)가 구비된다.The purifier 200 is provided with a filter 210 for separating PM and unleaded oil from the washing water W.

필터(210)에 걸러진 PM과 미연 Oil은 정화기(200)와 관로(500)로 연결된 배출탱크(220)에 저장된다.The PM and unburned oil filtered by the filter 210 are stored in the discharge tank 220 connected to the purifier 200 and the pipeline 500.

배출탱크(220)에는 PM과 미연 Oil의 양을 측정할 수 있는 센서가 구비되며, 측정된 양이 일정치 이상일 경우, 배출탱크(220)로부터 PM과 미연 Oil을 회수하게 된다. The discharge tank 220 is provided with a sensor capable of measuring the amount of PM and unleaded oil. When the measured amount is equal to or greater than a predetermined value, PM and unleaded oil are recovered from the discharge tank 220.

NOx제거단계(S3)에서는 관로(500)를 통해 이동되는 PM과 미연 Oil이 제거된 세정수(W)에 오존을 주입하여 NOx를 제거시키는 단계이다.In the NOx removing step (S3), ozone is injected into the cleansing water (W) from which PM and unburnt oil are removed through the pipeline (500) to remove NOx.

PM과 미연 Oil이 제거된 세정수(W)의 일부는 바이패스되면서 오존 발생기(300)에서 생성된 오존이 이젝터를 통해 투입된다. 즉, 정화기 후단에서 세정수는 오존이 주입되는 오존분기관과 오존의 주입이 없는 오존미분기관으로 분기 된 후에 다시 합쳐지는 합지관이 있으며, 상기 오존 발생기 전후에 주입된 오존에 의한 압력증가를 측정하기 위한 압력센서가 구비된다.
Part of the cleansing water W from which PM and unleavened oil have been removed is bypassed and ozone generated in the ozone generator 300 is injected through the ejector. That is, at the downstream end of the purifier, the washing water has an ozone branch injected with ozone and a combined pipe which is rejoined after branched into an ozone differentiator without injection of ozone, and the pressure increase due to ozone injected before and after the ozone generator is measured A pressure sensor is provided.

오존 발생기(300)에 대한 구체적인 구성은 오폐수에 오존을 주입하여 정화하는 장치에 관한 기술인 대한민국 등록특허공보 제10-1138003호(2012.04.20.)에 개시되었으므로 설명을 생략한다. The specific configuration of the ozone generator 300 is disclosed in Korean Patent Registration No. 10-1138003 (Apr. 20, 2012), which is an art relating to an apparatus for purifying ozone by introducing ozone into the wastewater, so that its explanation is omitted.

세정수(W)에 함유된 NOx가 화학식 1과 같은 반응을 하여 NOx가 질소와 산소로 치환됨으로써 세정수에 함유된 NOx가 제거된다.NOx contained in the cleansing water W reacts as shown in the formula (1), and NOx is replaced with nitrogen and oxygen, thereby removing NOx contained in the cleansing water.

[화학식 1][Chemical Formula 1]

2NO+2O3 -> N2+4O2 2NO + 2O 3 -> N 2 + 4O 2

2NO2+2O3 -> N2+5O2 2NO 2 + 2O 3 -> N 2 + 5O 2

PH중화단계(S4)는 SOx가 흡착되어 산도가 높아진 세정수(W)를 중화시키기 위해서 세정수(W)에 중화제를 주입하는 단계이다.The pH neutralization step S4 is a step of injecting a neutralizing agent into the washing water W to neutralize the washing water W having a high acidity due to the adsorption of SOx.

세정수(W)에는 SOx가 화학식 2와 같은 반응을 통해 함유되어 있으므로, PH가 산성을 띄게 된다.Since SOx is contained in the cleansing water (W) through a reaction similar to the reaction in Chemical Formula (2), PH becomes acidic.

[화학식 2](2)

SO2+H20 -> H2SO3 SO 2 + H 2 O -> H 2 SO 3

2SO3+2H20 ->2H2S04 2SO 3 + 2H 2 0 -> 2H 2 S0 4

NOx가 제거된 세정수(W)의 PH를 측정하기 위한 센서가 관로(500)에 구비된다.A sensor for measuring the pH of the cleansing water W from which NOx has been removed is provided in the pipeline 500.

관로(500)에 구비된 PH센서(520)에서 측정한 세정수(W)의 산도에 따라, 세정수(W)를 중화시키기 위한 중화제의 주입량이 결정된다.The injection amount of the neutralizing agent for neutralizing the washing water W is determined according to the acidity of the washing water W measured by the PH sensor 520 provided in the channel 500.

또한, 중화제는 PH센서(520)의 일측에 구비된 PH믹서(400)를 통하여 관로(500)에 주입된다. The neutralizer is injected into the channel 500 through the PH mixer 400 provided at one side of the PH sensor 520.

측정된 세정수(W)의 PH에 따라 주입될 중화제의 양이 산출되며, 세정수(W)를 배출하기 전에 PH믹서(400)에서 중화제를 세정수(W)에 주입하여 세정수(W)의 PH를 6.5 이상으로 유지시킨다.The neutralizer is injected into the washing water W in the PH mixer 400 before the washing water W is discharged to calculate the amount of the washing water W, Of PH is maintained at 6.5 or more.

오존발생기(300)에서 발생된 오존을 세정수(W)에 투입하기 위한 오존투입관로(700)가 오존발생기(300)와 스크러버(100) 사이에 구비된다.An ozone introduction conduit 700 for introducing ozone generated in the ozone generator 300 into the washing water W is provided between the ozone generator 300 and the scrubber 100.

청수 또는 해수가 분무될 때 오존투입관로(700)를 통해 오존도 같이 투입함으로써, 스크러버(100)로 유입되는 배기가스(G)에 포함된 NOx 제거율을 높이기 위한 것이다.And to increase the NOx removal rate contained in the exhaust gas G flowing into the scrubber 100 by injecting ozone through the ozone introduction pipe 700 when clean water or seawater is sprayed.

본 발명의 일 실시예는 NOx 제거단계(S3) 이후, PH믹서(400)에서 세정수(W)로 중화제를 주입하기 전 단계에서, 세정수(W)를 스크러버(100)로 재순환시켜 재분무 되도록 하는 세정수재순환단계를 더 포함한다.In an embodiment of the present invention, after the NOx removing step (S3), the washing water (W) is recirculated to the scrubber (100) in the PH mixer (400) before the neutralizing agent is injected into the washing water And a washing water recirculation step of causing the washing water to recirculate.

세정수(W)를 재순환함으로써, 세정수(W)에 함유된 오존에 의하여 배기가스에 함유된 NOx의 제거 효율을 높일 수 있다. By recirculating the cleansing water W, the removal efficiency of NOx contained in the exhaust gas can be increased by the ozone contained in the cleansing water W.

재순환관로(600)에는 재순환되는 세정수(W)의 온도를 낮추는 쿨러(610)가 구비된다. 쿨러(610)는 온도차이로 인한 세정수(W)의 기화를 방지하여, 오존과 화학식 1에 따라 세정수(W)에 내 NOx의 제거효율을 높이기 위함이다. 이는 스크러버(100)로 유입된 200℃ 이상의 온도를 갖는 배기가스(G)는 쿨러로 냉각되고 재순환되는 세정수(W)에 의하여 50℃ 이하로 냉각되는데, 세정수(W)에 포함된 오존과 배기가스(G)가 접촉할 때, 오존의 열분해가 감소되어, 궁극적으로 오존에 의한 NOx 제거효율이 향상되기 때문이다.The recirculation duct 600 is provided with a cooler 610 for lowering the temperature of the recirculated washing water W. The cooler 610 prevents vaporization of the washing water W due to the temperature difference and increases the removal efficiency of NOx in the washing water W according to the ozone and the chemical formula 1. [ This is because the exhaust gas G having a temperature of 200 DEG C or more introduced into the scrubber 100 is cooled to 50 DEG C or lower by the cleansing water W cooled and recirculated by the cooler. The ozone contained in the cleansing water W When the exhaust gas (G) comes into contact, the thermal decomposition of ozone is reduced and ultimately the NOx removal efficiency by ozone is improved.

세정수에 주입되는 오존양은 재순환세정수의 양과 재순환세정수의 오존 함유량에 따라 조절될 수 있으므로, 세정수가 재순환 될 때에는 오존투입관로(700)을 통해 투입되는 오존량을 줄일 수 있는 장점도 있다.
Since the amount of ozone injected into the washing water can be adjusted according to the amount of the recirculating washing water and the ozone content of the recirculating washing water, the amount of ozone introduced through the ozone feeding pipe 700 can be reduced when the washing water is recirculated.

G: 배기가스 W: 세정수 100: 스크러버
110: 버퍼탱크 200: 정화기 210: 필터
220: 배출탱크 300: 오존 발생기 400: PH믹서
500: 관로 510: 압력센서 520: PH센서
600: 재순환관로 610: 쿨러 700:오존투입관로
S1: 혼합 단계 S2: PM과 미연 Oil 분리단계
S3: NOx제거단계 S4: PH중화단계
SC: 해수상자(Seachest)G: exhaust gas W: washing water 100: scrubber
110: buffer tank 200: purifier 210: filter
220: discharge tank 300: ozone generator 400: PH mixer
500: channel 510: pressure sensor 520: PH sensor
600: recirculation duct 610: cooler 700: ozone inlet pipe
S1: mixing step S2: separating PM and unburnt oil
S3: NOx removal step S4: PH neutralization step
SC: Seawest box

Claims (10)

스크러버로 유입된 배기가스에 함유된 SOx, NOx, PM, 미연 Oil이 세정수에 흡착되도록 상기 배기가스에 상기 세정수가 분무되는 혼합 단계;
상기 세정수가 정화기로 유입되고, 상기 정화기에서 상기 세정수로부터 상기 PM과 상기 미연 Oil을 분리시키는 PM과 미연 Oil 분리단계;
상기 세정수에 오존을 주입하여 상기 세정수에 흡착된 상기 NOx를 제거하는 NOx제거단계;
상기 SOx가 흡착되어 산도가 높아진 상기 세정수를 중화시키기 위해서 상기 세정수에 중화제를 주입하는 PH중화단계;를 포함하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.Mixing the washing water with the exhaust gas so that SOx, NOx, PM, and unleavened oil contained in the exhaust gas flowing into the scrubber are adsorbed on the washing water;
Separating the PM and the unburnt oil from the clean water to separate the PM and the unburnt oil from the clean water;
A NOx removing step of injecting ozone into the cleansing water to remove the NOx adsorbed in the cleansing water;
And a PH neutralizing step of injecting a neutralizing agent into the cleansing water to neutralize the cleansing water whose acidity has been increased by adsorbing the SOx. 제1항에 있어서,
상기 혼합 단계에서 청수 또는 해수가 상기 스크러버로 공급되어 상기 세정수로 사용되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법. The method according to claim 1,
Wherein fresh water or seawater is supplied to the scrubber and used as the washing water in the mixing step. 제1항에 있어서,
상기 PM과 미연 Oil 분리단계에서 상기 세정수와 분리된 상기 PM과 상기 미연 Oil이 상기 정화기와 연결된 배출탱크로 분리되어 저장되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법. The method according to claim 1,
Wherein the PM and the unleaved oil separated from the cleansing water are separately stored in a discharge tank connected to the purifier during the separation of the PM and the unleaded oil, and the PM, SOx, and NOx in the exhaust gas of the ship are removed. 제1항에 있어서,
상기 NOx제거단계는 상기 세정수는 상기 오존이 주입되는 오존분기관과 상기 오존 주입없는 오존미분기관으로 분기 된 후에 다시 합쳐지는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.The method according to claim 1,
Wherein the cleaning water is collected again after the cleansing water is branched into an ozone branch injected with the ozone and an ozone differentiator without the ozone injection. 제4항에 있어서,
상기 관로에는 센서가 구비되어, 상기 오존 발생기로부터 오존이 상기 세정수로 주입되기 전과 후의 압력을 측정하고, 오존분기관으로의 분기량과 오존생성량을 조절하는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.5. The method of claim 4,
Wherein the pipe is provided with a sensor for measuring the pressure before and after the ozone is injected into the cleansing water from the ozone generator and controlling the amount of ozone generated in the ozone branch pipe and the amount of generated ozone, , SOx, NOx removal method. 제1항에 있어서,
상기 PH중화단계는 PH센서에서 측정된 상기 세정수의 산도에 비례하여 상기 중화제 주입량이 결정되고, 주입 후에는 PH믹서를 통해 혼합되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.The method according to claim 1,
Wherein the neutralizing agent injecting amount is determined in proportion to the acidity of the washing water measured by the pH sensor, and the neutralizing agent is mixed through the PH mixer after the injection. . 제1항에 있어서,
상기 NOx제거단계와 상기 PH중화단계의 사이에는 상기 세정수 중 일부인 재순환세정수를 상기 스크러버로 재순환시키는 세정수재순환단계가 추가되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.The method according to claim 1,
And recycling the recirculating washing water, which is a part of the washing water, to the scrubber, is added between the NOx removing step and the PH neutralizing step. 제7항에 있어서,
상기 세정수재순환단계에서 상기 스크러버로 재순환되는 상기 재순환세정수는 재순환 관로에 구비된 쿨러에 의하여 냉각되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.8. The method of claim 7,
Wherein the recirculating washing water recirculated to the scrubber in the washing water recirculation step is cooled by a cooler provided in the recirculation duct. 제1항 내기 제8항 중 어느 한 항에 있어서,
상기 혼합 단계에서 상기 세정수가 상기 스크러버로 유입기 전에, 오존이 상기 세정수에도 미리 주입함으로서, 오존이 함유된 세정수가 분무되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.The method according to any one of claims 1 to 8,
Wherein the cleansing water containing ozone is sprayed by ozone being injected into the cleansing water before the cleansing water flows into the scrubber in the mixing step. 제9항에 있어서,
상기 혼합 단계에서 상기 세정수에 주입되는 오존양은 상기 재순환세정수의 양과 상기 재순환세정수의 오존 함유량에 따라 조절되는 것을 특징으로 하는 선박의 배기가스 내 PM, SOx, NOx 제거 방법.10. The method of claim 9,
Wherein the amount of ozone injected into the washing water in the mixing step is adjusted according to the amount of the recirculating washing water and the ozone content of the recirculating washing water.
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KR20170013129A (en) * 2015-07-27 2017-02-06 (주)제스엔지니어링 Complex removing system of contaminating materials in flue gas
KR20170117119A (en) * 2015-03-13 2017-10-20 미츠비시 쥬고교 가부시키가이샤 Scrubber, exhaust gas treatment device, and ship
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* Cited by examiner, † Cited by third party
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JP3976444B2 (en) * 1998-06-23 2007-09-19 株式会社タクマ Exhaust gas treatment method and treatment apparatus
KR100484563B1 (en) * 2003-04-11 2005-04-20 (주)우리텍 A scrubber apparatus for processing noxious gases and fine dusts simultaneously
KR100701239B1 (en) * 2006-05-25 2007-03-29 환경플라즈마(주) SOx removal method and apparatus in flue gas by solid alkaline earth metal oxide

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KR20170117119A (en) * 2015-03-13 2017-10-20 미츠비시 쥬고교 가부시키가이샤 Scrubber, exhaust gas treatment device, and ship
KR20170013129A (en) * 2015-07-27 2017-02-06 (주)제스엔지니어링 Complex removing system of contaminating materials in flue gas
KR20190067789A (en) * 2016-10-28 2019-06-17 야라 마린 테크놀로지스 에이에스 System and method for measuring flow rate of rinse solution at exhaust gas inlet of exhaust gas cleaning system of ship

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