KR940011827B1 - Waste water clarifier - Google Patents

Waste water clarifier

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Publication number
KR940011827B1
KR940011827B1 KR1019910024839A KR910024839A KR940011827B1 KR 940011827 B1 KR940011827 B1 KR 940011827B1 KR 1019910024839 A KR1019910024839 A KR 1019910024839A KR 910024839 A KR910024839 A KR 910024839A KR 940011827 B1 KR940011827 B1 KR 940011827B1
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KR
South Korea
Prior art keywords
gas
blowing
blast furnace
dust
water
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KR1019910024839A
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Korean (ko)
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KR930012601A (en
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권성만
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포항종합제철 주식회사
정명식
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Priority to KR1019910024839A priority Critical patent/KR940011827B1/en
Publication of KR930012601A publication Critical patent/KR930012601A/en
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Publication of KR940011827B1 publication Critical patent/KR940011827B1/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

(A) the scruber (1) and the degassing chamber (4) and the control valve of scruber level (12) and the collecting water tube (5) and the precipitation tank (6); (B) newly established air injection apparatus (20) that comprises the air inflow tube (21) for inflowing gas and the spray pipe (22) for transporting inflowed gas to bottom of the collecting water tube (5) and the blowing nozzle (23) formed on the spray pipe (22) for blowing air in drain water. The air injection apparatus is installed in collecting water tube (5) between first branch pipe (5a) and degassing tower (4).

Description

고로가스 청정 집진수 처리장치Blast Furnace Gas Clean Dust Collector

제 1 도 : 통상의 고로가스 청정 집진수처리장치의 개략도.1 is a schematic diagram of a conventional blast furnace gas clean dust treatment apparatus.

제 2 도 : 본 발명의 기체취입장치가 집수구에 설치되어 있는 상태를 나타내는 단면도.2 is a cross-sectional view showing a state in which the gas blowing device of the present invention is installed in a water collecting port.

제 3 도 : 제 2 도의 A-A선을 따르는 단면도.3: Sectional view along the A-A line of FIG.

제 4 도 : 제 2 도의 B-B선을 따르는 단면도.4: Sectional view along the B-B line | wire of FIG.

제 5 도 : 집수구에 기체취입장치가 설치된 본 발명의 고로가스 청정 집진수처리장치의 개략도.5 is a schematic diagram of the blast furnace gas clean dust collecting treatment apparatus of the present invention, the gas blowing device is installed in the catchment.

제 6 도 : 가스청정 집진수의 압축공기 폭기실험결과를 나타내는 그래프.6 is a graph showing the results of a test for compressed air aeration of a clean dust collecting gas.

제 7 도 : 본 발명에 따라 가스청정 집진수를 처리한 결과를 나타내는 그래프.7 is a graph showing the results of processing gas clean dust collecting according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 스크루버 4 : 탈가스조1: scrubber 4: degassing tank

5 : 집수구 20 : 기체취입장치5: water collecting port 20: gas blowing device

21 : 기체유입관 22 : 분사배관21 gas inlet pipe 22 injection pipe

23 : 취입노즐23: Blowing nozzle

본 발명은 고로가스 청정 집진수처리장치에 관한 것으로서, 보다 상세하게는, 고로가스 청정 집진수의 pH를 상승시키는 고온가스 청정 집진수처리장치에 관한 것이다.The present invention relates to a blast furnace gas clean dust collector, and more particularly, to a hot gas clean dust collector for raising the pH of the blast furnace gas clean dust collector.

고로가스 청정설비는 고로에서 발생하는 가스에 함유된 더스트(Dust)를 제거하고 고온의 가스를 냉각시켜 연료로써 재사용할 수 있도록 처리하는 설비이며 일반적으로 중력식 건식제진기에서 조립의 더스트를 제거하고 습식집진기로 미립의 더스트를 제거하면서 냉각처리하는 것이 일반적으로서 이를 제 1 도를 통해 구체적으로 설명하면 다음과 같다.Blast furnace gas purification equipment is a facility that removes dust contained in blast furnace gas and treats it to be reused as fuel by cooling high temperature gas. Generally, it removes dust of assembly from gravity dry dust collector and wet dust collector. Cooling while removing dust in the furnace is generally described in detail with reference to FIG. 1 as follows.

즉, 제 1 도에 나타난 바와같이, 스크루버(SCRUBBER)(1)의 내부를 고로가스(BFG)가 통과하면서 분사노즐(2)에서 분무하는 물방울과 접촉하여 더스트는 물방울에 포집되어 상부 배수조에 낙하되고 가스는 링슬립워셔(RING SLIP WASHER)(3)을 통과하면서 2차로 분무된 물방울과 접촉하여 제진되고 나서 상승하여 출구관으로 배기된다. 상부 배수조에 저수된 집진수는 스크루버 수위조절밸브(12), 탈가스조(4), 집수구(5)를 거쳐 침전저(6)에서 응집처리된다. 응집침전후 침전조(6)에서 넘친 청전수는 급수조(7)에 유도되어 세정수펌프(8), 수량조절밸브(9)를 거쳐 스크루버(1) 상부 및 하부에 다시 분무된다. 한편, 스크루버 하부 배수조에 집적된 집진수는 순환펌프(10), 순환수량 조절밸브(11)를 거쳐 스크루버(1)의 상부의 가스유입측에 재분무된다.That is, as shown in FIG. 1, as the blast furnace gas BFG passes through the inside of the scrubber 1, the dust comes into contact with the water droplets sprayed from the injection nozzle 2, and the dust is collected in the water droplets to the upper sump. After falling, the gas passes through a RING SLIP WASHER 3, contacts with secondary sprayed water droplets, is damped, then rises and is exhausted to the outlet pipe. The dust collected in the upper sump is agglomerated in the sedimentation basin 6 through the screw level control valve 12, the degassing tank 4, and the water collecting port 5. After the flocculation sedimentation, the fresh water overflowed from the settling tank 6 is guided to the water supply tank 7 and sprayed again to the upper and lower parts of the scrubber 1 through the washing water pump 8 and the water control valve 9. On the other hand, the dust collector integrated in the lower portion of the scrubber is re-sprayed on the gas inlet side of the upper portion of the screwer (1) through the circulation pump (10), the circulation water amount control valve (11).

그러나, 상기한 고로가스 청정 집진수처리장치를 사용하여 고로가스 집진 및 배수처리를 하는 경우에는 집진 및 배수 순환공정에서 pH전하에 따른 펌프, 급수배수관, 밸브등의 부식 문제때문에 설비고장, 가스청정도 유지가 문제로 되고 있다.However, when the blast furnace gas is collected and drained by using the blast furnace gas dust-collecting treatment device, equipment failure and gas cleanliness may occur due to corrosion problems such as pumps, water supply pipes, and valves due to pH charge in the dust collection and drainage circulation processes. Maintenance is a problem.

그리고, 집진순환수계의 pH 상승처리설비로서 가성소다 용해주입장치는 값비싼 알칼리 약제를 사용하며, 약제의 술입, 저장, 보온처리시 유독 물질을 취급하는 위험성과 상온에서 가성소다 희석액이 응결고착되는 장애가 있으며 장치의 운전, 배치가 복잡하면서 알칼리부식 장애로 설비고장이 빈번히 발생되는 문제점이 있다. 또한, 석회석 주입에 의한 pH 상승처리시는 다량의 분체를 수입, 저장, 용해, 주입처리하기 때문에 분진, 오염, 응집고착 장애가 있고 장치 운전, 배치가 복잡한 문제점이 있다.In addition, the caustic soda dissolution injection device uses an expensive alkali chemicals as a pH raising treatment facility of the dust collection circulating system, and the caustic soda diluent is solidified at room temperature due to the danger of handling toxic substances during the injection, storage, and thermal treatment of the chemicals. There are obstacles, and the operation and arrangement of the device is complicated, and there is a problem that frequent equipment failure occurs due to alkali corrosion failure. In addition, when the pH increase treatment by limestone injection, a large amount of powder is imported, stored, dissolved and injected, so that there is a problem of dust, contamination, agglomeration and fixation, and device operation and arrangement are complicated.

한편, 고로가스중에는 통상, 21-23%의 일산화탄소와 이산화탄소가 각각 함유되어 있으며 이 두종류의 가스 조성은 고로의 조업상태 즉, 압력, 연료비, 생산속도, 장비원, 연료의 종류, 통기성등에 따라 조성이 변화하며 이산화탄소가 많아지며 고로의 연료비가 저하하게 되며, 이산화탄소는 수용성 가스로써 증류수중에 1600㎎/l 정도 포화용해되며 이때의 pH는 4정도로 약산성 된다.On the other hand, blast furnace gas usually contains 21-23% of carbon monoxide and carbon dioxide, and these two types of gas composition depend on the operating conditions of the blast furnace, namely pressure, fuel cost, production speed, equipment source, fuel type, and breathability. The composition changes, the carbon dioxide increases, the fuel cost of the blast furnace decreases, and the carbon dioxide is a water-soluble gas, saturated and dissolved about 1600mg / l in distilled water, and the pH at this time is weakly acidic.

제 6 도는 가스청정 집진수의 압축공기 폭기시험 결과의 일례이며, 가설폭기조에 30분간 체류하는 동안 집진수와 압축공기의 비를 3배가 되게 압축공기로 폭기한 후 방류토록 하고 입구와 배출구의 pH와 이산화탄소 용해량 측정한 것이다. 이 결과는 고로가스의 배수중에는 40-120ppm 정도의 이산화탄소가 용해되어 있으며 공기 폭기로 50-5ppm까지 제거되면서 pH를 0.2-0.9정도 상승시키는 효과가 있음을 알 수 있다.6 is an example of the test results of the compressed air aeration test for the gas clean dust collection, while the ratio of the dust collection and the compressed air is tripled by the compressed air while staying in the temporary aeration tank for 30 minutes, and discharged. And the amount of carbon dioxide dissolved. This result shows that 40-120ppm of carbon dioxide is dissolved in the drainage of the blast furnace gas and the pH is increased to 0.2-0.9 by removing 50-5ppm by air aeration.

그러나 유입되는 집진수의 pH 변동에 대한 폭기효과는 일정하지 않고, 잔존 이산화탄소의 용해량에 대한 pH 경향도 상관성을 보이지 않고 있으며, 폭기조 설치처리시는 폭기조내의 침전 고형물 때문에 장기간 연속처리가 불가능하며 주기적인 폭기조의 배수 및 청소가 필요하여 투자비 과도 소요에도 불구하고 작업부하가 과중하게 되는 문제점이 있다.However, the aeration effect on the pH fluctuations of the collected dust is not constant, and there is no correlation between the pH trends on the dissolved carbon dioxide concentration, and during the aeration tank installation, continuous treatment cannot be performed for a long time due to precipitation solids in the aeration tank. There is a problem that the workload is heavy despite the excessive investment costs due to the drainage and cleaning of the aeration tank.

본 발명은 종래의 고로가스 청정 칩진수처리장치의 집수구에 분사배관 및 취입노즐을 설치하여 집수구내를 통과하는 배수중에 기체를 취입하므로서, 배수교란 및 기체부상에 의한 폭기효과로 용존기체를 증발시켜, pH 상승효과를 얻고, 작업부하가 없을 뿐만 아니라 별도의 설비투자없이 고로 가스 청정 집진수를 연속적으로 처리할 수 있는 고로가스 청정 집진수처리장치를 제공하고자 하는데, 그 목적이 있다.The present invention installs the injection pipe and the blowing nozzle in the water collecting port of the conventional blast furnace gas clean chip processing device, and blows gas into the water passing through the water collecting port, thereby evaporating the dissolved gas by the aeration effect due to the disturbance of the water and gas injury In addition, the present invention aims to provide a blast furnace gas clean-up dust collection apparatus capable of continuously processing the blast-furnace gas clean-up dust collection as well as gaining a pH increase effect and having no work load.

이하, 본 발명을 도면에 의해 상세히 설명한다.Hereinafter, the present invention will be described in detail by the drawings.

본 발명은, 제 1 도 및 제 2 도에 나타난 바와같이, 스크루버(1), 탈가스조(4), 스크루버 수위조절 밸브(12), 집수구(5) 및 침전조(6) 등을 포함하여 구성되는 고로가스 청정 칩진수처리장치에 있어서 집수구(5)를 개량한 것이다.The present invention, as shown in Figs. 1 and 2, includes a screwer 1, a degassing tank 4, a screwer level control valve 12, a catcher 5, a settling tank 6, and the like. The catchment port 5 is improved in the blast furnace gas clean chip quenching apparatus constructed in the above.

본 발명에 따른 집수구 개량은, 제2도-제4도에 나타난 바와같이, 상기 집수구(5)내에 기체취입장치(20)를 형성시키므로서 이루어지는데, 이 기체취입장치(20)는 기체를 유입하기 위한 기체유입관(21), 이 유입관(21)으로부터 유입된 기체를 상기 집수구(5)내의 저부로 수송하기 위한 분사배관(22), 및 이 분사배관(22)을 통해 수송된 기체를 분사시키는 다수의 취입노즐(23)을 구비하여 구성된다.The catchment improvement according to the present invention is achieved by forming a gas blowing device 20 in the catchment 5, as shown in FIGS. 2 to 4, wherein the gas blowing device 20 introduces gas. To the gas inlet pipe 21, the injection pipe 22 for transporting the gas introduced from the inlet pipe 21 to the bottom in the water collecting port 5, and the gas transported through the injection pipe 22 A plurality of blowing nozzles 23 for injection are provided.

상기 기체취입장치(20)는, 제 5 도에 나타난 바와같이, 제 1 침전조(6)로 갈라지게 되는 제 1 지관(5a)과 탈가스조(4) 사이의 집수구(5)에 설치되는 것이 바람직하다.As shown in FIG. 5, the gas blowing device 20 is provided in the water collecting port 5 between the first branch pipe 5a and the degassing tank 4, which are split into the first settling tank 6. desirable.

상기 기체유입관(21)은 기체공급원(도시되어 있지 않음)과 연결되어 있으며, 여기서 사용된 기체로는 압축공기, 질소 또는 아르곤 가스등을 사용할 수 있는데, 경제적인 관점을 고려하면, 압축공기 또는 질소를 취입기체로서 사용하는 것이 바람직하다.The gas inlet pipe 21 is connected to a gas supply source (not shown), and the gas used here may be compressed air, nitrogen, or argon gas, etc. In view of economics, compressed air or nitrogen Is preferably used as a blowing gas.

상기 분사배관(22)은 집수구(5)내를 통과하는 배수를 적절히 교란하고 기체부상에 의한 기폭효과로 용존기체를 적절히 증발시켜 pH 상승효과를 얻도록 구성된다.The injection pipe 22 is configured to properly disturb the drainage passing through the water collecting port 5 and to properly evaporate the dissolved gas by the detonation effect caused by gas injury to obtain a pH raising effect.

그리고, 상기 취입노즐(23)은 상기 분사배관(22)상에 형성되며, 그 수 및 크기는 배수의 교반 및 기폭효과를 고려하여 설정된다.Then, the blowing nozzle 23 is formed on the injection pipe 22, the number and size thereof are set in consideration of the agitation and detonation effect of the drainage.

이하, 실시예를 통하여 본 발명을 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

[실시예]EXAMPLE

본 발명의 기체취입장치(20)를 사용하여 수면 1/2깊이 및 1/3깊이에서 1.18m/s의 유속으로 집수구(5)를 통과하는 배수에 취입량을 제 7 도와 같이 변화해가면서 질소를 취입한 다음, 10분마다 배수의 pH를 측정하여 그 결과를 제 7 도에 나타내었다.By using the gas blowing device 20 of the present invention, the amount of blowing into the drainage passing through the catchment port 5 at a flow rate of 1.18 m / s at 1/2 depth and 1/3 depth of the water is changed as shown in the 7th degree. After blowing, the pH of the drainage was measured every 10 minutes and the results are shown in FIG.

제 7 도에 나타난 바와같이, 본 발명에 부합되는 기체 취입장치(20)를 사용하여 폭기용 기체(질소)를 취입하므로서, 배수의 pH가 상승됨을 알 수 있다.As shown in FIG. 7, it can be seen that the pH of the waste water is increased by blowing the gas (nitrogen) for aeration using the gas blowing device 20 according to the present invention.

그리고 pH 6에서는 취입질소를 단위 배수용적에 대하여 686 l/㎡ 이상 취입하는 것이 최적임을 알 수 있으며, 이산화탄소 용해도가 보다 높아지면 즉 pH가 저하하면 동일한 pH 유지를 위해서는 당연히 폭기용 질소 취입비도 증대되어야 함을 알 수 있다.In addition, at pH 6, it is known that blowing nitrogen is more than 686 l / m2 in terms of the unit drainage volume, and when the carbon dioxide solubility is higher, that is, the pH is lowered, the aeration nitrogen injection ratio must be increased to maintain the same pH. It can be seen.

상술한 바와같이, 본 발명은 기체를 취입하기 위한 기체유입관(21), 분사배관(22) 및 취입노즐(23)만의 구성으로 구조가 간단하면서도 밸브의 개폐에 의한 조작만으로 연속운전이 가능하고 압축공기 팬을 추가 설치하거나 이미 사용중인 공장내의 여분의 압축질소를 사용하므로서 설비고장이나 취급에 따른 위험성이 전혀 없는 고로가스 청정 집진수처리장치를 제공하는 효과가 있는 것이다.As described above, the present invention has a simple structure with only the gas inlet pipe 21, the injection pipe 22, and the blowing nozzle 23 for blowing gas, and can be operated continuously by only opening and closing the valve. By installing an additional compressed air fan or using extra compressed nitrogen in a factory that is already in use, there is an effect of providing a blast furnace gas clean-up treatment device with no risk of equipment failure or handling.

Claims (1)

스크루버(1), 탈가스조(4), 스크루버 수위조절밸브(12), 집수구(5), 및 침전조(6)를 포함하여 구성되는 고로가스 청정 집진수처리장치에 있어서, 상기 집수구(5)의 제 1 지관(5a)과 상기 탈가스탑(4) 사이의 집수구(5)내에 기체 취입장치(20)가 형성되어 있고 ; 상기 기체취입장치(20)는 기체를 유입하기 위한 기체 유입관(21), 이 유입관(21)으로부터 유입된 기체를 상기 집수구(5)의 저부로 수송하기 위한 분사배관(22), 및 이 분사배관(22)을 통해 수송된 기체를 상기 집수구(5)내를 통과하는 배수중에 취입시키는 다수의 취입노즐(23)을 구비하여 구성되는 것을 특징으로 하는 고로가스 청정 집진수처리장치.In the blast furnace gas clean-up dust-collecting apparatus comprised of the scrubber 1, the degassing tank 4, the scrubber level control valve 12, the sump 5, and the settling tank 6, the said sump 5 A gas blowing device 20 is formed in the water collecting port 5 between the first branch pipe 5a and the degassing column 4 of the c); The gas blowing device 20 is a gas inlet pipe 21 for introducing gas, the injection pipe 22 for transporting the gas introduced from the inlet pipe 21 to the bottom of the catch port 5, and this The blast furnace gas clean dust collecting apparatus, characterized in that it comprises a plurality of blowing nozzles (23) for blowing the gas transported through the injection pipe (22) in the drain passing through the water collecting port (5).
KR1019910024839A 1991-12-28 1991-12-28 Waste water clarifier KR940011827B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100931234B1 (en) * 2002-12-28 2009-12-10 주식회사 포스코 Blast Furnace Gas Cleaning Equipment Dust Collector
KR20190075743A (en) * 2017-12-21 2019-07-01 주식회사 포스코 System and method for removing adherent dust in dust duct

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100931234B1 (en) * 2002-12-28 2009-12-10 주식회사 포스코 Blast Furnace Gas Cleaning Equipment Dust Collector
KR20190075743A (en) * 2017-12-21 2019-07-01 주식회사 포스코 System and method for removing adherent dust in dust duct

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