KR20020026988A - Modified inlet part for the wet scrubber - Google Patents

Modified inlet part for the wet scrubber Download PDF

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Publication number
KR20020026988A
KR20020026988A KR1020000058108A KR20000058108A KR20020026988A KR 20020026988 A KR20020026988 A KR 20020026988A KR 1020000058108 A KR1020000058108 A KR 1020000058108A KR 20000058108 A KR20000058108 A KR 20000058108A KR 20020026988 A KR20020026988 A KR 20020026988A
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South Korea
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gas
absorption tower
spray tower
liquid
tower body
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KR1020000058108A
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Korean (ko)
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KR100542953B1 (en
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민병수
이성영
남기일
백재진
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김형벽ㅂ
현대중공업 주식회사
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Priority to KR1020000058108A priority Critical patent/KR100542953B1/en
Priority to CN01135348A priority patent/CN1346691A/en
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    • 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
    • B01D47/12—Washers with plural different washing sections
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • 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
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (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)
  • Gas Separation By Absorption (AREA)

Abstract

PURPOSE: A modified inlet part for wet scrubber is provided to uniform velocity distribution of pollutant laden gas introduced to wet scrubber for the removal of SOx, NOx, and particulate pollutants. CONSTITUTION: Pollutant laden gas enters a spray tower(10) through a gas inlet pipe(12) and is directed upwards through the spray tower to contact with slurry droplets sprayed from a fluid sprayer(14) in a counter current mode, resulting in the absorption of gaseous pollutants. Fine droplets entrained in gas is eliminated in a mist separator(20) and sequently discharged toward a gas outlet(22). Fluid sprayed from the fluid sprayer fall to a reactor(16) and is recycled to the fluid sprayer by a pump(18). Gas cleaning efficiency greatly depends on velocity of gas in the bottom of spray tower and its distribution, that is, the more velocity distribution of gas is uniform in radial direction within spray tower, the higher desulfurization/dedusting efficiencies is obtained. In the present invention, for improving gas cleaning efficiency, the gas inlet pipe is slant toward the spray tower at degrees of 35°-55°.

Description

배가스 유입구 부분을 개선한 기-액 흡수탑{Modified inlet part for the wet scrubber}Modified inlet part for the wet scrubber

본 발명은 배가스내의 특정 성분을 제거하기 위하여 사용되는 기-액 흡수탑에 관한 것으로서, 더욱 상세하게는 흡수탑의 가스 유입관을 흡수탑과 경사지게 형성함으로써 흡수탑으로 유입되는 배가스가 흡수탑 반경방향으로 균일하게 유지될 수 있도록 한 배가스 유입구에 관한 것이다.The present invention relates to a gas-liquid absorption tower used to remove specific components in the exhaust gas, and more particularly, by forming the gas inlet pipe of the absorption tower inclined with the absorption tower, the exhaust gas flowing into the absorption tower is radially absorbed. It relates to an exhaust gas inlet so that it can be kept uniform.

일반적으로, 산업용 및 발전용 보일러, 화학공정, 폐기물 소각로 등에서 발생되는 배가스 중에는 황산화물, 질소산화물, 비산회 등이 다량 함유되어 있는데 환경오염물질의 배출억제 또는 회수 등을 목적으로 이들 물질을 배가스 내에서 분리하는 기술이 사용되고 있다. 이러한 기술로서 슬러리 액적을 흡수탑내에서 배가스와 접촉시켜 가스상의 환경오염물질을 흡수할 수 있는 세정탑이 대표적인 경우이다. 현재까지 알려진 기술로는 탑내의 빈공간에 노즐을 통하여 액상의 물질을 분사시키는 분사탑, 분사탑 중간에 트래이를 설치하여 배가스와 흡수액을 재접촉시키는 공정 등이 있다.In general, the flue gas generated from industrial and power boilers, chemical processes, waste incinerators, etc. contains a large amount of sulfur oxides, nitrogen oxides, fly ash, etc., and these substances are contained in the flue gas for the purpose of suppressing or recovering environmental pollutants. Separation techniques are used. As such technology, a cleaning tower capable of absorbing gaseous environmental pollutants by bringing slurry droplets into contact with exhaust gas in an absorption tower is a typical case. Techniques known to date include an injection tower for injecting a liquid substance through a nozzle into an empty space in the tower, and a process of installing a tray in the middle of the injection tower to contact the exhaust gas and the absorbing liquid again.

그러나, 종래에는 도 1 에서와 같이 흡수탑 본체(100) 일측에 가스 유입관(120)을 흡수탑 본체(100)와 직각되게 형성하고 흡수탑 본체(100) 내부에 각각 수분 분리기(200)와 반응조(160)를 형성하며 흡수탑 본체(100) 상단에 가스 출구관(220)을 형성하고 본체(100) 내부 중앙에 액상 분사노즐(140)을 설치한 상태에서 액상 분사노즐(140)을 배관(240,240')으로 액상 순환펌프(180)와 연결 설치한다.However, in the related art, as shown in FIG. 1, the gas inlet pipe 120 is formed at one side of the absorption tower main body 100 at a right angle with the absorption tower main body 100, and the water separator 200 and the inside of the absorption tower main body 100 respectively. Piping the liquid injection nozzle 140 in a state in which the reaction vessel 160 is formed and the gas outlet pipe 220 is formed on the upper end of the absorption tower body 100 and the liquid injection nozzle 140 is installed in the center of the body 100. It is connected to the liquid circulation pump 180 to (240,240 ').

상기, 가스가 유입된 관(120)에서 흡수탑(100) 내로 배가스 흐름의 확장과 배가스가 유입관(120) 반대편 흡수탑(100) 벽에 부딪혀 흡수탑내 배가스 흐름이 균일하지 못하고 한 곳으로 치우치기 때문에 전체적인 흡수 효율이 저하되는 문제점이 있어 흡수탑내에서 슬러리 액적과 배가스가 영역을 증가시키기 위하여 흡수탑을 더 크게 설계하거나 배가스의 흐름을 균일하게 하기 위한 별도의 설비를 갖추게 된다.The exhaust gas flows from the pipe 120 into the absorption tower 100 and the exhaust gas collides with the wall of the absorption tower 100 opposite the inflow pipe 120 so that the exhaust gas flow in the absorption tower is uneven and shifted to one place. As a result, the overall absorption efficiency is deteriorated, so that the slurry droplets and the flue-gases are designed to have a larger absorption tower in order to increase the area of the slurry or to provide a separate facility for uniform flue gas flow.

또한, 흡수탑 상부에서 분무 낙하되는 슬러리 액적이 배가스 유입관으로 유입되는 것을 방지하기 위한 부가설비가 필요한 문제점이 있었다.In addition, there is a problem that an additional facility for preventing the slurry droplets sprayed from the upper portion of the absorption tower to be introduced into the exhaust gas inlet pipe.

본 발명은 상기한 문제점을 해결하기 위하여 안출한 것으로서, 그 목적은 흡수탑의 배가스 유입구 부분을 흡수탑에 비스듬히 설치하여 흡수탑내로 유입되는 배가스가 흡수탱크 상부에서 흡수액과 충돌하여 배가스가 흡수액 상부에서 균일하게 퍼져 흡수탑 반경방향으로 균일한 흐름이 형성될 수 있게 한다.The present invention has been made to solve the above problems, the object is to install the exhaust gas inlet portion of the absorption tower obliquely in the absorption tower so that the exhaust gas flowing into the absorption tower collides with the absorption liquid in the absorption tank upper portion of the absorption liquid from the upper side of the absorption liquid. Spread evenly to allow uniform flow to be formed in the absorption tower radial direction.

또한, 배가스가 흡수탑내로 유입될 때 가스의 흐름 방향을 하향으로 하여 상부에서 낙하되는 액적이 가스관 내로 유입되는 것을 방지할 수 있는 흡수탑 유입구 구조를 제공하는 것이다.In addition, it is to provide an absorption tower inlet structure that can prevent the liquid droplets falling from the upper side to flow into the gas pipe when the exhaust gas flows into the absorption tower downwards.

도 1 은 종래의 흡수탑을 나타낸 단면예시도1 is a cross-sectional view showing a conventional absorption tower

도 2 는 본 발명의 흡수탑을 나타낸 단면예시도Figure 2 is a cross-sectional view showing an absorption tower of the present invention

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(10) : 흡수탑 본체(10): absorption tower body

(12) : 가스 유입관12: gas inlet pipe

(14) : 액상 분사노즐(14): liquid jet nozzle

(16) : 반응조(16): reactor

(18) : 액상 순환펌프(18): liquid circulation pump

(20) : 수분 분리기20: moisture separator

(22) : 가스 출구관22: gas outlet pipe

(24,24') : 배관(24,24 '): Piping

이하, 첨부된 도면을 참조하여 본 발명의 구성 및 작용을 설명하면 다음과 같다.Hereinafter, the configuration and operation of the present invention with reference to the accompanying drawings.

도 2 는 본 발명의 흡수탑을 나타낸 단면예시도를 도시한 것으로서, 흡수탑 본체(10) 일측에 흡수탑 본체(10)와 35°∼ 55°기울어지게 가스 유입관(12)을 형성하고 흡수탑 본체(10) 내부 하단에 반응조(16)를 형성하며 흡수탑 본체(10) 내부 상단에 수분 분리기(20)를 고정 설치한다.2 is a cross-sectional view illustrating the absorption tower of the present invention, in which the gas inlet tube 12 is formed to be absorbed by the absorption tower body 10 and 35 ° to 55 ° on one side of the absorption tower body 10. The reactor 16 is formed at the lower end of the tower main body 10, and the water separator 20 is fixed to the upper end of the absorption tower main body 10.

상기, 흡수탑 본체(10) 상단에 가스 출구관(22)을 형성하고 흡수탑 본체(10) 내부 중앙에 다수개의 액상 분사노즐(14)을 설치하되 이 액상 분사노즐(14)은 배관(24)을 따라 액상 순환펌프(18)와 연결되며 액상 순환펌프(18)는 반응조(16)에 배관(24')으로 연결된 구성으로 되어진 것이다.The gas outlet pipe 22 is formed at the upper end of the absorption tower main body 10, and a plurality of liquid injection nozzles 14 are installed in the center of the absorption tower main body 10. It is connected to the liquid circulation pump 18 along the liquid circulating pump 18 is configured to be connected to the reaction tank 16 by the pipe 24 '.

상기와 같은 구성을 참조하여 본 발명의 작용을 설명하겠다.The operation of the present invention will be described with reference to the above configuration.

처리될 가스는 가스 유입관(12)을 통하여 흡수탑(10) 내부로 유입된다. 유입된 가스는 흡수탑(10) 상부로 상승하게 되며 이때 상부에서 분무되는 슬러리 액적과 접촉하여 기상 내에 존재하는 물질을 액적이 흡수하고 가스와 함께 비말동반되어 나가는 미세액적은 수분 분리기(20)에서 제거된 후 처리된 가스 출구(22)쪽으로 배출된다.The gas to be treated is introduced into the absorption tower 10 through the gas inlet pipe 12. The introduced gas rises to the upper part of the absorption tower 10, and the micro droplets which are in contact with the slurry droplets sprayed from the upper side absorb the droplets present in the gas phase and are entrained with the gas in the water separator 20. It is removed and then discharged towards the treated gas outlet 22.

한편, 분사된 액적은 반응조(16)로 낙하된 후 액상 순환펌프(18)에 의하여 다시 액상 분사노즐(14)로 순환된다. 이러한 일련의 과정이 흡수탑(10)에서 진행되는데 가스의 제거효율은 흡수탑(10) 하부에서 가스의 유속분포에 따라 크게 달라질수 있다. 즉 탑내에서의 반경방향으로 유속분포가 균일할수록 동일한 운전 조건에서 탈황/탈진 효율이 높게 되는 것이다.On the other hand, the injected droplet is dropped into the reaction tank 16 and then circulated back to the liquid injection nozzle 14 by the liquid circulation pump 18. This series of processes is carried out in the absorption tower 10, the removal efficiency of the gas may vary greatly depending on the flow rate distribution of the gas in the lower portion of the absorption tower (10). That is, the more uniform the flow rate distribution in the radial direction in the tower, the higher the desulfurization / dedusting efficiency under the same operating conditions.

또한, 흡수탑(10)에 유입구(12)를 35°∼ 55°기울어지게 설치하여 유입되는 배가스가 슬러리 액적과 직접적인 접촉에 의한 배가스의 운동 모멘텀의 손실량을 최소화하여 배가스가 슬러리 탱크 상부에서 흡수액과 운동 모멘텀을 교환하면서 흡수탑 반경 방향으로 유속이 균일화되고 일부 배가스는 흡수액 탱크와 액적분무영역 사이에 기울어진 흡수탑의 모서리 영역을 이용하여서도 유동균일화된다. 이때, 흡수액 탱크에 전달된 배가스의 모멘텀은 흡수액 탱크내 흡수액의 교반에 이용된다. 기울어진 가스 유입관(12)은 배가스가 흡수탑에 하향 유입되는 유동분포를 가지기 때문에 흡수탑 운전중 슬러리 액적이 배가스 유입구 부분으로 입사되어 발생하는 문제점을 근본적으로 해결할 수 있다. 또한, 기울어진 가스 유입관(12)은 슬러리 탱크와 슬러리 액적이 분무되는 영역사이에 존재하는 재순환 영역을 최소화한다.In addition, the inlet 12 is installed in the absorption tower 10 in an angle of 35 ° to 55 ° to minimize the amount of kinetic momentum of the exhaust gas caused by the direct contact of the inlet gas with the slurry droplets. The flow velocity is uniform in the radial direction of the absorber tower while exerting kinetic momentum, and some flue-gases are also flow homogenized using the corner region of the absorber tower inclined between the absorbent tank and the droplet spray zone. At this time, the momentum of the exhaust gas delivered to the absorbent liquid tank is used for stirring the absorbent liquid in the absorbent liquid tank. Since the inclined gas inlet pipe 12 has a flow distribution in which the exhaust gas flows downward into the absorption tower, it is possible to fundamentally solve the problem caused by the slurry droplets entering the exhaust gas inlet portion during the operation of the absorption tower. The inclined gas inlet 12 also minimizes the recirculation area present between the slurry tank and the area where the slurry droplets are sprayed.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

본 발명은 흡수탑 입구에서 가스의 유속을 균일하게 유지함으로써 가스중의 특정 성분에 대한 제거효율을 높일 수 있기 때문에 제거효율이 일정한 상태에서 흡수탑의 높이를 줄일 수 있고 분출가스에 의한 반응조 표면 부위에서의 기-액 접촉 효과 상승 뿐 아니라 배가스 유입구로 액적 유입을 방지하기 위한 별도의 설비가 필요하지 않기 때문에 흡수탑의 제작 비용을 절감할 수 있으며 또한, 흡수탑의 높이가 낮아짐에 따라 흡수액 순환에 필요한 압력이 감소하여 동력비를 절감할 수 있도록 한 매우 유용한 발명인 것이다.The present invention can increase the removal efficiency of a particular component in the gas by maintaining a uniform flow rate of the gas at the inlet of the absorption tower can reduce the height of the absorption tower in a constant removal efficiency and the surface portion of the reaction tank by the blowing gas In addition to increasing the gas-liquid contact effect, the cost of fabricating the absorber can be reduced by eliminating the need for additional equipment to prevent droplets from entering the flue-gas inlet. It is a very useful invention that can reduce the required pressure by reducing the required pressure.

Claims (1)

흡수탑 본체(10) 일측에 흡수탑 본체(10)와 35°∼ 55°기울어지게 가스 유입관(12)을 형성하여 흡수탑 본체(10) 내부 하단에 흡수탑 본체(10) 단면적보다 확장된 반응조(16)와 연결부위에 결합되어 형성되며 흡수탑 본체(10) 내부 상단에 수분 분리기(20)를 고정 설치하고 상기, 흡수탑 본체(10) 상단에 가스 출구관(22)을 형성하며 흡수탑 본체(10) 내부 중앙에 다수개의 액상 분사노즐(14)을 설치하되 이 액상 분사노즐(14)은 배관(24)을 따라 액상 순환펌프(18)와 연결되고 액상 순환펌프(18)는 반응조(16)에 배관(24')으로 연결된 것을 특징으로 하는 배가스 유입구 부분을 개선한 기-액 흡수탑.The gas inlet pipe 12 is formed to be inclined to the absorption tower body 10 and 35 ° to 55 ° on one side of the absorption tower body 10 to extend the cross-sectional area of the absorption tower body 10 at the lower end of the absorption tower body 10. It is formed by being coupled to the reaction vessel 16 and the connection portion, the water separator 20 is fixedly installed on the upper end of the absorption tower body 10, and the gas outlet pipe 22 is formed on the absorption tower body 10 and absorbed. A plurality of liquid injection nozzles 14 are installed in the center of the tower body 10, and the liquid injection nozzles 14 are connected to the liquid circulation pump 18 along the pipe 24, and the liquid circulation pump 18 is a reaction tank. A gas-liquid absorption tower with an improved exhaust gas inlet portion, which is connected to a pipe (16 ') at (16).
KR1020000058108A 2000-10-04 2000-10-04 Modified inlet part for the wet scrubber KR100542953B1 (en)

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CN01135348A CN1346691A (en) 2000-10-04 2001-09-30 Absorption tower with improved gas inlet duct

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Cited By (2)

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KR102382563B1 (en) 2022-01-03 2022-04-01 주식회사 금용 Automobile front-sprinkler saltwater snow plowlt with calcium chloride spray
CN115646167A (en) * 2022-09-07 2023-01-31 中国科学院过程工程研究所 Blast furnace gas wet oxidation desulfurization device and method

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JPH07102300A (en) * 1993-10-07 1995-04-18 Lion Corp Tabletted detergent composition
JPH0857249A (en) * 1994-08-25 1996-03-05 Ishikawajima Harima Heavy Ind Co Ltd Absorbing column
KR100251067B1 (en) * 1998-04-21 2000-04-15 이종훈 Spray-type absorption tower for polluted gas
JP2003338209A (en) * 2002-05-20 2003-11-28 Koito Mfg Co Ltd Headlamp for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102382563B1 (en) 2022-01-03 2022-04-01 주식회사 금용 Automobile front-sprinkler saltwater snow plowlt with calcium chloride spray
CN115646167A (en) * 2022-09-07 2023-01-31 中国科学院过程工程研究所 Blast furnace gas wet oxidation desulfurization device and method

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