KR20120000961A - Apparatus for removing nitrogen oxide of flue gas - Google Patents

Apparatus for removing nitrogen oxide of flue gas Download PDF

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Publication number
KR20120000961A
KR20120000961A KR1020100061517A KR20100061517A KR20120000961A KR 20120000961 A KR20120000961 A KR 20120000961A KR 1020100061517 A KR1020100061517 A KR 1020100061517A KR 20100061517 A KR20100061517 A KR 20100061517A KR 20120000961 A KR20120000961 A KR 20120000961A
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pipe
supply pipe
exhaust gas
stack
nitrogen oxide
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KR1020100061517A
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Korean (ko)
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KR101193782B1 (en
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송창병
김상빈
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현대제철 주식회사
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    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • 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
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

PURPOSE: An apparatus for eliminating the nitrogen oxide of flue gas is provided to accelerate an eliminating reaction and effectively eliminate nitrogen dioxide by preventing the temperature reduction of the flue gas. CONSTITUTION: An apparatus for eliminating the nitrogen oxide of flue gas includes a spraying pipe(20), a plurality of spraying nozzle(30), and a supplying pipe(10). The spraying pipe is installed at the inner circumference of a stack(1) which discharges the flue gas. The spraying nozzles are installed at the spraying pipe. The supplying pipe connects the spraying pipe and a water tank(40). The supplying pipe is installed at the outer circumference of the stack. A branched pipe(70) is in connection with the supplying pipe and is in connection with a steaming pipe(60). A path converting valve(80) is installed at the connecting part of the supplying pipe and the branched pipe.

Description

배가스의 질소산화물 제거장치{apparatus for removing Nitrogen Oxide of flue gas}Apparatus for removing Nitrogen Oxide of flue gas

본 발명은 배가스의 질소산화물 제거장치에 관한 것으로, 특히 스카핑 공정에서 발생한 이산화질소를 효과적으로 제거할 수 있도록 된 배가스의 질소산화물 제거장치에 관한 것이다.The present invention relates to an apparatus for removing nitrogen oxides from exhaust gas, and more particularly, to an apparatus for removing nitrogen oxides from exhaust gas, which is capable of effectively removing nitrogen dioxide generated in a scarfing process.

연속주조공정을 통해 생산된 슬라브(slab)는 압연 제품의 품질 향상을 위해 미리 스카핑(scarfing ; 고압의 산소와 질소를 사용하여 슬라브 표면을 용융시키고 불어내어 제거하는 공정)을 실시하여 표면 결함을 제거하고 있다.The slab produced through the continuous casting process is pre-scarfed to melt, blow and remove the slab surface using high pressure oxygen and nitrogen to improve the quality of the rolled product. It is being removed.

상기 스카핑 공정에서는 다량의 먼지와 고온에 의한 질소산화물이 형성되는데, 상기 먼지는 습식 전기집진기를 이용하여 제거하지만, 질소산화물은 제거되지 않고 있다.In the scarfing process, a large amount of dust and nitrogen oxides are formed by high temperature. The dust is removed using a wet electrostatic precipitator, but the nitrogen oxides are not removed.

본 발명은 제철공장 배가스의 질소산화물 특히, 이산화질소를 효과적으로 제거할 수 있도록 된 배가스의 질소산화물 제거장치를 제공함에 그 목적이 있다.It is an object of the present invention to provide an apparatus for removing nitrogen oxides of exhaust gases, which enables to effectively remove nitrogen oxides, particularly nitrogen dioxide, from the exhaust gas of a steel mill.

상기와 같은 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

배가스가 배출되는 스택의 내주면에 설치된 스프레이관과,A spray tube installed on the inner circumferential surface of the stack through which exhaust gas is discharged;

상기 스프레이관에 설치된 다수의 분사노즐과,A plurality of injection nozzles installed in the spray pipe,

상기 스프레이관과 물탱크를 연결하는 공급파이프를 포함한다.It includes a supply pipe connecting the spray tube and the water tank.

또한, 상기 공급파이프는 상기 스택의 외측면에 설치된 것을 특징으로 한다.In addition, the supply pipe is characterized in that installed on the outer surface of the stack.

또한, 상기 공급파이프에 분지관이 연결되고, 상기 분지관은 스팀배관에 연결되며, 상기 공급파이프와 상기 분지관의 연결부분에 경로전환밸브가 설치된 것을 특징으로 한다.In addition, a branch pipe is connected to the supply pipe, the branch pipe is connected to the steam pipe, characterized in that the path switching valve is installed in the connection portion of the supply pipe and the branch pipe.

또한, 상기 공급파이프의 물탱크 인접 위치에 펌프가 설치된 것을 특징으로 한다.In addition, the pump is installed in a position adjacent to the water tank of the supply pipe.

또한, 상기 분사노즐이 하방으로 경사지게 설치된 것을 한다.In addition, the injection nozzle is installed to be inclined downward.

또한, 상기 스프레이관에는 상기 공급파이프 연결위치의 반대쪽 위치에 상기 공급파이프로부터 분지된 보조공급파이프가 연결된 것을 특징으로 한다.The spray pipe may be connected to an auxiliary supply pipe branched from the supply pipe at a position opposite to the supply pipe connection position.

또한, 상기 물탱크에 황산 또는 과산화수소 중 어느 하나가 첨가된 것을 특징으로 한다.In addition, any one of sulfuric acid or hydrogen peroxide is added to the water tank.

이상 설명한 바와 같은 본 발명에 따르면,According to the present invention as described above,

배가스 배출 경로 상에 별도의 설비를 추가할 필요 없이 스택 내부에서 물을 분사해줌으로써 배가스에 포함된 질소산화물 특히 이산화질소를 효과적으로 제거할 수 있게 된다.It is possible to effectively remove nitrogen oxides, especially nitrogen dioxide, contained in the flue gas by spraying water inside the stack without the need for additional equipment on the flue gas discharge path.

또한, 스택의 내부에 물 대신 스팀을 분사할 수 있게 됨으로써 배가스의 온도 감소를 방지하여 제거반응이 보다 활발히 이루어지도록 할 수 있다.In addition, by allowing steam to be injected into the stack instead of water, it is possible to prevent the reduction of the temperature of the exhaust gas so that the removal reaction is more actively performed.

또한, 물 또는 스팀이 스택 내부 단면적에 빈틈없이 분사되고, 하방으로 분사됨으로써 스택을 따라 상향 이동하는 모든 배가스와 전체적으로 균일하게 제거반응이 이루어지게 되어 질소산화물 제거 효과가 향상된다.In addition, the water or steam is injected into the stack cross-sectional area, and is injected downward to uniformly remove all the exhaust gas moving along the stack as a whole to improve the nitrogen oxide removal effect.

또한, 보조공급파이프가 설치되어 스프레이관내에 분사압의 차가 발생하지 않게 됨으로써 스택 내부에 전체적으로 고르게 물(스팀)을 분사할 수 있게 된다.In addition, the auxiliary supply pipe is installed so that the difference in the injection pressure does not occur in the spray tube, it is possible to spray the water (steam) evenly throughout the stack.

또한, 물에 황산 또는 과산화수소를 첨가하여 분사함으로써 질소산화물 제거 성능이 향상되는 효과가 있다.In addition, by adding sulfuric acid or hydrogen peroxide to the water and sprayed there is an effect that the nitrogen oxide removal performance is improved.

도 1은 본 발명에 따른 배가스의 질소산화물 제거장치의 설치 상태도,
도 2는 본 발명의 주요 구성인 스프레이관의 저면도 및 종단면도,
도 3은 상기 스프레이관의 변형 실시예이다.1 is an installation state of the nitrogen oxide removal device of the exhaust gas according to the present invention,
2 is a bottom view and a longitudinal sectional view of a spray tube, which is a main configuration of the present invention;
3 is a modified embodiment of the spray tube.

이하, 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

이산화질소(NO2)는 스카핑 공정에서 질소(N2)와 산소(O2)가 고온 반응하여 생성되거나, 스카핑시 발생한 산화질소(NO)가 전기집진기의 오존(O3)과 반응하여 생성된다.Nitrogen dioxide (NO 2 ) is produced by the high temperature reaction of nitrogen (N 2 ) and oxygen (O 2 ) in the scarfing process, or by nitrogen oxide (NO) generated during the scarfing reaction with ozone (O 3 ) of the electrostatic precipitator. do.

상기 이산화질소는 고로 및 소결로에서 발생한 배가스와 더불어 배가스관(2)을 거쳐 스택(1)으로 배출된다.(도 1 참조)The nitrogen dioxide is discharged to the stack 1 via the exhaust gas pipe 2 together with the exhaust gas generated in the blast furnace and the sintering furnace (see FIG. 1).

본 발명은 도 1에 도시된 바와 같이, 물을 공급하는 공급파이프(10)와, 상기 공급파이프(10)에 연결되고 스택(1)의 내주면에 설치된 스프레이관(20)과, 상기 스프레이관(20)에 설치된 다수의 분사노즐(30)을 포함한다.As shown in FIG. 1, the present invention provides a supply pipe 10 for supplying water, a spray pipe 20 connected to the supply pipe 10 and installed on an inner circumferential surface of the stack 1, and the spray pipe ( And a plurality of injection nozzles 30 installed at 20).

상기 공급파이프(10)는 스택(1)의 외측면에 고정 설치되고, 스택(1)의 하부로부터 상기 스프레이관(20)이 설치된 높이까지 연장된다. 이와 같이 공급파이프(10)가 스택(1)의 외측면에 설치됨으로써 유지 및 보수가 편리하다.The supply pipe 10 is fixedly installed on the outer surface of the stack 1, and extends from the bottom of the stack 1 to a height at which the spray pipe 20 is installed. In this way, the supply pipe 10 is installed on the outer surface of the stack 1, which is convenient for maintenance and repair.

상기 공급파이프(10)는 상단부가 스택(1)을 관통하여 그 내부에 설치된 상기 스프레이관(20)에 연결된다.The supply pipe 10 is connected to the spray pipe 20 having an upper end penetrating through the stack 1 and installed therein.

또한, 상기 공급파이프(10)의 타단(하단)은 스프레이관(20)으로 공급할 물이 저장된 물탱크(40)에 연결된다.In addition, the other end (lower end) of the supply pipe 10 is connected to a water tank 40 in which water to be supplied to the spray pipe 20 is stored.

상기 물탱크(40)에는 황산(H2SO4) 또는 과산화수소(H2O2)가 첨가(용해)될 수 있다.Sulfuric acid (H 2 SO 4 ) or hydrogen peroxide (H 2 O 2 ) may be added (dissolved) to the water tank 40.

또한, 상기 공급파이프(10)에는 상기 물탱크(40)의 물을 상기 스프레이관(20)까지 원활하게 공급할 수 있도록 펌프(50)가 설치된다.In addition, the supply pipe 10 is provided with a pump 50 to smoothly supply the water in the water tank 40 to the spray pipe (20).

상기 펌프(50)는 설치 및 유지 보수가 용이하도록 상기 물탱크(40)가 설치된 지상쪽에 설치되는 것이 바람직하다.The pump 50 is preferably installed on the ground side where the water tank 40 is installed to facilitate installation and maintenance.

한편, 상기 스프레이관(20)은 링 형상으로 형성되고, 상기 스택(1)의 내주면에 밀착되며, 수평 상태로 설치된다.On the other hand, the spray tube 20 is formed in a ring shape, in close contact with the inner peripheral surface of the stack (1), is installed in a horizontal state.

상기 스프레이관(20)은 U볼트, 브라켓 등을 매개로 상기 스택(1)의 내주면에 고정된다.The spray tube 20 is fixed to the inner circumferential surface of the stack 1 via a U bolt, a bracket or the like.

상기 분사노즐(30)은 도 2에 도시된 바와 같이, 상기 스프레이관(20)의 내측 원주면에 설치된다.The injection nozzle 30 is installed on the inner circumferential surface of the spray tube 20, as shown in FIG.

상기 분사노즐(30)의 개수 및 설치 간격에 특별한 제한은 없으나 분사공(31)으로부터 분사되는 물 분사범위가 이웃한 분사노즐의 물 분사범위와 상호 겹치도록 설치되어, 스택(1)의 배가스 통과 단면적에 있어서 물이 분사되지 않는 부분을 최소화하는 것이 바람직하다.There is no particular limitation on the number and installation intervals of the injection nozzles 30, but the water injection range sprayed from the injection hole 31 is installed so as to overlap with the water injection range of the neighboring injection nozzles, so that the exhaust gas passes through the stack 1 It is desirable to minimize the portion of the cross section where no water is sprayed.

실제로는 분사압이 충분하여 분사된 물 입자는 반대쪽 위치의 스택 벽까지 도달할 수 있고, 사방에서 분사된 물이 서로 충돌하면서 섞이게 되어 스택(1) 단면적 전체로 퍼지므로 스택을 통과하는 배가스는 모두 물과 접촉하게 된다.In practice, the injection pressure is sufficient so that the sprayed water particles can reach the stack wall in the opposite position, and the sprayed water from all directions collide with each other and spread throughout the stack (1) cross-sectional area. It comes in contact with water.

또한, 상기 분사노즐(30)은 상기 스프레이관(20)에 대하여 하방으로 경사진(경사각 θ) 상태로 설치된다.In addition, the injection nozzle 30 is installed in a state inclined downward (inclined angle θ) with respect to the spray pipe (20).

따라서, 스택(1)을 따라 상방으로 올라오는 배가스를 향해 물을 분사할 수 있도록 되어 있다.Therefore, water can be injected toward the exhaust gas which rises upward along the stack 1.

한편, 상기 공급파이프(10)의 하부(상기 펌프(50) 설치 위치의 앞쪽)에 분지관(70)이 연결되고, 상기 분지관(70)은 제철공장에 기 설치되어 있는 스팀배관(60)에 연결된다.Meanwhile, a branch pipe 70 is connected to a lower portion of the supply pipe 10 (the front of the pump 50 installation position), and the branch pipe 70 is a steam pipe 60 that is previously installed in a steel mill. Is connected to.

그리고, 상기 공급파이프(10)와 분지관(70)의 연결부위에는 경로전환밸브(80)가 설치된다.In addition, a path switching valve 80 is installed at a connection portion between the supply pipe 10 and the branch pipe 70.

상기 경로전환밸브(80)는 개방경로를 상기 물탱크(40)쪽 또는 상기 스팀배관(60)쪽으로 전환하는 역할을 수행한다.The path switching valve 80 serves to switch the open path toward the water tank 40 or the steam pipe 60.

또한, 상기 스프레이관(20)은 도 3에 도시된 바와 같이, 상기 공급파이프(10)가 연결된 위치의 반대쪽 위치에 보조공급파이프(15)가 연결될 수 있다.In addition, as shown in FIG. 3, the spray pipe 20 may be connected to the auxiliary supply pipe 15 at a position opposite to the position where the supply pipe 10 is connected.

상기 보조공급파이프(15)는 도시하지 않았으나 상기 공급파이프(10)로부터 분지되어 스택(1)의 외주면을 따라 반대쪽으로 연장된 후, 상기 스프레이관(20)에 연결되는 것이다.Although not shown, the auxiliary supply pipe 15 is branched from the supply pipe 10 and extended to the opposite side along the outer circumferential surface of the stack 1, and then connected to the spray pipe 20.

이제, 본 발명의 작용 및 효과를 설명한다.Now, the operation and effect of the present invention will be described.

스카핑 공정에서 발생한 이산화질소는 제철공장내 다른 장소에서 발생한 배가스와 함께 배가스관(2)으로 배풍되고, 이어 배가스관(2)의 말단에 연결된 스택(1)을 따라 상승하여 대기중으로 배출된다.Nitrogen dioxide generated in the scarfing process is blown to the exhaust gas pipe 2 together with the exhaust gas generated at another place in the steelmaking plant, and then rises along the stack 1 connected to the end of the exhaust gas pipe 2 and is discharged to the atmosphere.

이때 상기 펌프(50)가 작동되면 물탱크(40)에 저장된 물이 상기 공급파이프(10)를 통해 스프레이관(20)으로 유입되고, 상기 펌프(50)에 의해 형성된 수압에 의해 상기 분사노즐(30)의 분사공(31)을 통해 스택(1) 내부 공간으로 분사된다.At this time, when the pump 50 is operated, water stored in the water tank 40 is introduced into the spray pipe 20 through the supply pipe 10, and the injection nozzles are formed by the water pressure generated by the pump 50. Through the injection hole 31 of 30 is injected into the stack 1 internal space.

따라서, 스택(1)을 통과하는 배가스내 이산화질소(NO2)는 분사된 물(H2O) 및 배가스에 포함된 산소(O2)와 반응하여 질산(HNO3)을 생성한다.Therefore, nitrogen dioxide (NO 2 ) in the exhaust gas passing through the stack 1 reacts with the injected water (H 2 O) and oxygen (O 2 ) included in the exhaust gas to generate nitric acid (HNO 3 ).

즉, 배가스내 이산화질소는 4NO2 + 2H2O + O2 → 4HNO3 의 방식으로 반응하여 제거된다.In other words, nitrogen dioxide in the flue-gas is reacted and removed in the manner of 4NO 2 + 2H 2 O + O 2 → 4HNO 3 .

한편, 상기 물탱크(40)의 물에 황산(H2SO4)이 첨가된 경우에는,On the other hand, when sulfuric acid (H 2 SO 4 ) is added to the water of the water tank 40,

(NO + NO2 ) + 2H2SO4 → 2NOHSO4 + H2O(NO + NO 2 ) + 2H 2 SO 4 → 2NOHSO 4 + H 2 O

NO + H2SO4 → H2SO4NONO + H 2 SO 4 → H 2 SO 4 NO

와 같이 반응하여 제거된다. 즉, 황산이 첨가된 경우 이산화질소 뿐만 아니라 일산화질소의 제거도 가능하다.It is reacted and removed as That is, when sulfuric acid is added, not only nitrogen dioxide but also nitrogen monoxide can be removed.

또한, 상기 물탱크(40)에 과산화수소(H2O2)가 첨가된 경우에는,In addition, when hydrogen peroxide (H 2 O 2 ) is added to the water tank 40,

2NO2 + H2O2 → 2HNO3 2NO 2 + H 2 O 2 → 2HNO 3

와 같이 반응하여 이산화질소가 제거된다.React to remove nitrogen dioxide.

한편, 상기 경로전환밸브(80)의 개방 방향을 조절하여 스팀을 공급할 수 있는데, 스팀의 경우에도 동일한 방식(4NO2 + 2H2O + O2 → 4HNO3 )으로 이산화질소가 제거되며, 이 경우 분사에 의해 배가스의 온도가 급감되지 않으므로 제거반응이 보다 활발하게 이루어지는 장점이 있다.On the other hand, it is possible to supply steam by adjusting the opening direction of the path switching valve 80, even in the case of steam nitrogen dioxide is removed in the same manner (4NO 2 + 2H 2 O + O 2 → 4HNO 3 ), in this case injection Since the temperature of the exhaust gas is not drastically reduced, there is an advantage that the removal reaction is more active.

한편, 상기 분사노즐(30)은 전술한 바와 같이 분사되는 물 또는 스팀의 분사범위가 상호 겹쳐지도록 설치되어 스택 내 배가스 통과 단면적 전체를 커버하므로 배가스와 물(또는 스팀)의 반응량이 증가하여 이산화질소 제거량이 증가하게 된다. 즉, 배가스가 물과 반응하지 않고 배출되는 것이 방지된다.On the other hand, the injection nozzle 30 is installed so that the injection range of the water or steam to be sprayed overlap as described above to cover the entire cross-sectional area of the exhaust gas passing through the stack, so the reaction amount of the exhaust gas and water (or steam) is increased to remove nitrogen dioxide Will increase. That is, the exhaust gas is prevented from reacting with the water without being discharged.

또한, 상기 분사노즐(30)이 하방으로 경사지게 설치되어 있으므로 분사된 물이 상승하는 배가스와 충돌함으로써 제거반응이 보다 활발히 이루어지도록 되어 있다.In addition, since the injection nozzle 30 is inclined downward, the sprayed water collides with the rising exhaust gas so that the removal reaction is more actively performed.

한편, 상기 스프레이관(20)에 보조공급파이프(15)가 구비된 경우에는 물(또는 스팀)이 스프레이관(20)의 양쪽 측부로부터 동시 공급되므로 스프레이관(20)의 내부에 전체적으로 고르게 압력이 형성됨으로써 모든 분사노즐(30)에서 균일하게 물(또는 스팀)이 배출된다.(한쪽에만 공급파이프가 있는 경우 공급파이프가 연결된 지점의 반대쪽 부분에는 충분한 분사압력이 형성되지 않을 수 있다.)On the other hand, when the auxiliary supply pipe 15 is provided in the spray pipe 20, water (or steam) is supplied from both sides of the spray pipe 20 at the same time so that the pressure evenly throughout the spray pipe 20 As a result, water (or steam) is uniformly discharged from all the injection nozzles 30 (when there is a supply pipe on only one side, sufficient injection pressure may not be formed on the opposite side of the point where the supply pipe is connected).

이는 스택 단면적 전체에 걸쳐 균일한 밀도의 분사층을 형성함으로써 스택 단면적 상의 위치에 따라 질소산화물 제거 정도에 차이가 발생하지 않도록 해 준다. 즉, 스택 단면적 전체에 걸쳐 균일한 제거 반응이 이루어지게 되어 제거되지 않고 배출되는 질소산화물(이산화질소 포함)의 양이 최소화된다.This makes it possible to form a spray layer of uniform density throughout the stack cross-sectional area so that there is no difference in the degree of nitrogen oxide removal depending on the position on the stack cross-sectional area. That is, the uniform removal reaction is made over the entire stack cross-sectional area to minimize the amount of nitrogen oxides (including nitrogen dioxide) discharged without being removed.

1 : 스택 2 : 배가스관
10 : 공급파이프 15 : 보조공급파이프
20 : 스프레이관 30 : 분사노즐
31 : 분사공 40 : 물탱크
50 : 펌프 60 : 스팀배관
70 : 분지관 80 : 경로전환밸브1: stack 2: exhaust pipe
10: supply pipe 15: auxiliary supply pipe
20: spray tube 30: injection nozzle
31: injection hole 40: water tank
50: pump 60: steam piping
70: branch pipe 80: path switching valve

Claims (7)

배가스가 배출되는 스택의 내주면에 설치된 스프레이관과,
상기 스프레이관에 설치된 다수의 분사노즐과,
상기 스프레이관과 물탱크를 연결하는 공급파이프
를 포함하는 배가스의 질소산화물 제거장치.A spray tube installed on the inner circumferential surface of the stack through which exhaust gas is discharged;
A plurality of injection nozzles installed in the spray pipe,
Supply pipe connecting the spray tube and the water tank
Nitrogen oxide removal device of the exhaust gas comprising a. 청구항 1에 있어서,
상기 공급파이프는 상기 스택의 외측면에 설치된 것을 특징으로 하는 배가스의 질소산화물 제거장치.The method according to claim 1,
The supply pipe is nitrogen oxide removal apparatus of the exhaust gas, characterized in that installed on the outer surface of the stack. 청구항 1에 있어서,
상기 공급파이프에 분지관이 연결되고, 상기 분지관은 스팀배관에 연결되며, 상기 공급파이프와 상기 분지관의 연결부분에 경로전환밸브가 설치된 것을 특징으로 하는 배가스의 질소산화물 제거장치.The method according to claim 1,
A branch pipe is connected to the supply pipe, and the branch pipe is connected to the steam pipe, the nitrogen oxide removal device of the exhaust gas, characterized in that the path switching valve is installed in the connection portion of the supply pipe and the branch pipe. 청구항 1에 있어서,
상기 공급파이프의 물탱크 인접 위치에 펌프가 설치된 것을 특징으로 하는 배가스의 질소산화물 제거장치.The method according to claim 1,
The apparatus for removing nitrogen oxides of exhaust gas, characterized in that a pump is installed in a position adjacent to the water tank of the supply pipe. 청구항 1에 있어서,
상기 분사노즐이 하방으로 경사지게 설치된 것을 특징으로 하는 배가스의 질소산화물 제거장치.The method according to claim 1,
The nitrogen oxide removal apparatus of the exhaust gas, characterized in that the injection nozzle is installed to be inclined downward. 청구항 1에 있어서,
상기 스프레이관에는 상기 공급파이프 연결위치의 반대쪽 위치에 상기 공급파이프로부터 분지된 보조공급파이프가 연결된 것을 특징으로 하는 배가스의 질소산화물 제거장치.The method according to claim 1,
And an auxiliary supply pipe branched from the supply pipe is connected to the spray pipe at a position opposite to the supply pipe connection position. 청구항 1에 있어서,
상기 물탱크에 황산 또는 과산화수소 중 어느 하나가 첨가된 것을 특징으로 하는 배가스의 질소산화물 제거장치.
The method according to claim 1,
Nitrogen oxide removal apparatus of the exhaust gas, characterized in that any one of sulfuric acid or hydrogen peroxide is added to the water tank.
KR1020100061517A 2010-06-28 2010-06-28 apparatus for removing Nitrogen Oxide of flue gas KR101193782B1 (en)

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CN110043348A (en) * 2019-05-27 2019-07-23 厦门大学嘉庚学院 A kind of exhaust gas purification system and its working method of anti-vehicle exhaust diffusion
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