WO2019045187A1 - Ipa를 포함하는 공정 배기 스트림의 처리 시스템 - Google Patents
Ipa를 포함하는 공정 배기 스트림의 처리 시스템 Download PDFInfo
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- WO2019045187A1 WO2019045187A1 PCT/KR2017/014357 KR2017014357W WO2019045187A1 WO 2019045187 A1 WO2019045187 A1 WO 2019045187A1 KR 2017014357 W KR2017014357 W KR 2017014357W WO 2019045187 A1 WO2019045187 A1 WO 2019045187A1
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- water
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- exhaust stream
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- process exhaust
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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
- B01D53/75—Multi-step processes
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- 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
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- 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
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
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- 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
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0035—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by wetting, e.g. using surfaces covered with oil
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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
- B01D47/06—Spray cleaning
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0216—Other waste gases from CVD treatment or semi-conductor manufacturing
Definitions
- the present invention relates to the field of process exhaust stream treatment, and more particularly to a treatment system capable of drastically reducing the generation of wastewater in the treatment of a process exhaust stream comprising IPA.
- alcohol solvents such as IPA (isopropyl alcohol) are used as cleaning agents in various processes.
- IPA isopropyl alcohol
- IPA has characteristics that do not leave stains and is widely used for cleaning semiconductor wafers and the like.
- IPA is harmful to the human body as an alcohol organic solvent
- the process for this usually involves treating the IPA by contacting the process exhaust stream with water in a wet scrubber.
- Figure 1 is a schematic illustration of a conventional, conventional wet scrubber for the treatment of a process exhaust stream comprising IPA.
- the conventional wet scrubber introduces the process exhaust stream into the gas inlet 1, contacts the water in the water contact area 7 to treat IPA and other harmful substances, and then discharges the gas to the gas outlet 9 .
- the water in contact with the exhaust stream is circulated through the circulation unit 5 for use in the water contained in the water tank 3.
- the process exhaust stream contains a very high concentration of IPA.
- This high concentration of alcohol IPA is easily decomposed when it is circulated and injected. Therefore, it is necessary to supply a large amount of replenishing water to lower the IPA concentration in the water (circulating water) contained in the water tank 3, which inevitably causes a large amount of waste water to be generated.
- the present invention has been made in view of the above-mentioned conventional problems, and provides a treatment system capable of reducing waste water generation in the treatment of a process exhaust stream including IPA.
- the present invention provides a treatment system capable of drastically reducing the amount of water by performing multi-stage treatment, and again using water used for treatment of a low-concentration IPA-containing stream for treatment of a high-concentration IPA-containing stream.
- the present invention provides a processing system for a process exhaust stream comprising IPA comprising: an IPA concentration reducing process for reducing at least the IPA concentration in the process exhaust stream; And a wet scrubber for receiving and processing the process exhaust stream treated at the IPA concentration reduction stage.
- the IPA concentration reducing unit comprises: a spraying part for spraying water into the process exhaust stream as a mist; And an electric dust collection unit for collecting mist and mist-bonded components in the process exhaust stream transferred from the spray unit.
- the IPA concentration reducing unit may further include a wet filter unit for wet-filtering the process exhaust stream received from the electric dust collector.
- the IPA concentration reducing apparatus may further include a first water tank containing at least water used in the wet filter unit.
- the wet scrubber comprising: a second receiving unit; A water contact area disposed on the second water receiving part and in contact with the water of the process exhaust stream and the water of the second water receiving part; A second circulation section for circulating water in the second receiving section in contact with the process exhaust stream in the water contact area; And a gas outlet for discharging the treated process exhaust stream.
- the second water tub may be connected to the water replenishing line so that the water overflows when the water is held at a certain level or more.
- the first water trough receives water overflowing from the second water receiving portion, and the water in the first water receiving portion is circulated and injected in the wet filter portion.
- the water contained in the first receiving portion is maintained at a concentration lower than the first concentration value for IPA and the water contained in the second receiving portion is maintained at a second concentration lower than the first concentration value .
- the present invention provides a processing system for a process exhaust stream comprising IPA comprising: an IPA concentration reducing process for reducing at least the IPA concentration in the process exhaust stream; And a wet scrubber for receiving and processing the process exhaust stream treated at the IPA concentration reduction stage, wherein the IPA concentration reducer may be used by receiving the water used in the wet scrubber.
- the IPA concentration reducing unit may include a wet filter unit in which water in the first receiving unit and the first receiving unit are circulated and brought into contact with the process exhaust stream, and the wet scrubber is provided with a second water receiving unit, To contact the process exhaust stream.
- Water contained in the first receiving portion and the second receiving portion may be maintained at a predetermined IPA concentration and the second water receiving portion may be maintained at a lower IPA concentration than the first receiving portion.
- a water replenishing line may be connected to the second receiving portion and a water outlet may be formed in the first receiving portion in order to maintain a predetermined IPA concentration of the water accommodated in the first receiving portion and the second receiving portion, .
- the IPA concentration reducing apparatus may further include a spray unit for spraying water into the process exhaust stream as a mist and an electric dust collection unit for collecting mist and mist-bonded components in the process exhaust stream delivered from the spray unit.
- the present invention provides a treatment system capable of reducing the generation of wastewater in the treatment of a process exhaust stream comprising IPA.
- Water can be saved by reusing the water used in the treatment of the stream containing the low concentration IPA and the stream containing the high concentration IPA while treating the process exhaust stream containing IPA in a multistage process.
- the IPA concentration in the water used separately for each water tank can be managed individually, thereby performing the process continuously and stably.
- 1 is a schematic view of a conventional wet scrubber.
- FIGS. 2a and 2b are block diagrams schematically illustrating examples of processing of a processing system of a process exhaust stream comprising an IPA of the present invention.
- Figure 3 is a diagram illustrating a preferred embodiment of a process exhaust stream processing system comprising an IPA of the present invention.
- FIG. 4 is a diagram showing the test results of the processing system of the process exhaust stream including the process IPA of the present invention.
- FIGs 2a and 2b are block diagrams schematically illustrating examples of processing of a processing system of a process exhaust stream comprising an IPA of the present invention.
- Figure 3 is a schematic diagram of a processing system for a process exhaust stream comprising an IPA of the present invention.
- 2a shows an example of a system of the present invention
- FIG. 2B shows another example, wherein one example of FIG. 2A shows that before the process exhaust stream is treated in the wet scrubber 30, (10) is a basic example of performing pre-processing to lower the IPA concentration.
- FIG. 2B which is described below as a preferred embodiment, includes a configuration in which a water overflow is performed between the wet scrubber 30 and the IPA concentration reducer 10.
- the processing system of the process exhaust stream comprising the IPA of the present invention includes an IPA concentration reduction device 10 and a wet scrubber 30.
- the systems of the present invention shown in Figures 2a and 2b are applied to process a process exhaust stream, including IPA, like a semiconductor manufacturing process.
- the process exhaust stream is flowed into the IPA concentration reducer 10 and treated to sufficiently lower the concentration of IPA in the process exhaust stream and then transferred to the wet scrubber 30 where the concentration of IPA in the wet scrubber 30 reaches the process target value And then discharged into the atmosphere.
- the water used in the wet scrubber 30, which treats the process exhaust stream containing low concentration IPA the water used in the wet scrubber 30, which treats the process exhaust stream containing low concentration IPA
- the IPA concentration reducing device 10 that processes the process exhaust stream can be used again to remarkably save water.
- the IPA concentration reducing device 10 may include a spraying section 11, a dust collecting section 13, a wet filter section 15, and a first receiving section 17.
- a preferred example of the IPA concentration reducer 10 may be installed in a tower (vertical) arrangement of elements vertically, but a horizontally disposed horizontal or other arrangement may be applied Of course.
- the atomizing unit 11 and the electric dust collecting unit 12 primarily process IPA at a high concentration.
- a spraying unit 11 for spraying water into the process exhaust stream from the process apparatus as mist an electric dust collection unit 13 for collecting mist and mist-bonded components in the process exhaust stream delivered from the spraying unit 11, . ≪ / RTI >
- water is sprayed as mist into the process exhaust stream containing the high concentration IPA flowing into the gas inflow section 111 so that at least a part of the IPA is adsorbed on the mist.
- the water used in the spraying section 11 may be fresh water supplied from the outside, not the circulating water. And collects the IPA bound to the mist in the electric dust collector 13.
- the water used in the spraying section 11 and the electric dust collection section 13 may be fresh water supplied from the outside, but a substantially small amount is consumed because it is sprayed with mist.
- the wet filter unit 15 wet-processes the process exhaust stream that has passed through the electrostatic dust collecting unit 12, and preferably, the water contained in the first water receiving unit 17 is circulated and sprayed. Therefore, it is possible to further include the first circulation unit 19 for circulating the water of the first receiving unit 17 to make contact with the exhaust stream.
- the first receiving portion 17 receives and utilizes the water overflowed from the second receiving portion of the wet scrubber 30.
- the first hatching section 17 is managed to have a concentration of IPA of, for example, less than or equal to a first concentration value of about 4 ppm or less.
- the water is discharged to the water outlet 171 provided in the first receiving portion 17.
- the process exhaust stream treated in the IPA concentration reduction reactor 10 is transferred to the wet scrubber 30 to perform the tertiary treatment.
- the wet scrubber 30 may be a tower type device.
- the wet scrubber 30 is disposed on the second receiving portion 31 and the second receiving portion 31 from below and has a water contact region 33 where the process exhaust stream and the water of the second receiving portion 31 are in contact with each other, A second circulation portion 35 for circulating water in the second receiving portion 31 so as to contact the process exhaust stream in the water contact region 33 and a gas discharge portion 37 for discharging the processed process exhaust stream .
- the second water receiving portion 31 may be connected to the water replenishing line 40 and overflow to the first receiving portion 17 of the IPA concentration reducing drum 10 when the water is held at a certain level or more.
- a passageway 43 for delivering the process exhaust stream treated in the wet filter section 15 of the IPA concentration reduction device 10 to the wet scrubber 30 is disposed.
- the lower end of the wet scrubber 30 is connected, but the present invention is not limited thereto.
- the exhaust stream treated in the IPA concentration reducer 10 can be introduced over the upper end of the wet scrubber 30, in which case the gas exhaust can be disposed at the lower portion.
- a water replenishing line (40) is connected to the second water receiving portion (31) of the wet scrubber (30) to receive fresh water from the outside.
- the water contained in the second receiving portion 31 is maintained at a low IPA concentration (second concentration value) of, for example, 0.5 ppm or less. Therefore, when the IPA concentration of the second receiving section 31 is equal to or higher than the second concentration value, or when the IPA concentration value of the first receiving section 17 is equal to or higher than the first concentration value, the water is supplied from the water replenishment line 40 And adjusts the concentration of IPA in the second receiving portion 31 and the first receiving portion 17.
- the spraying section 11 injects water into the mist as to the process exhaust stream from the process apparatus that has flowed into the gas inlet 111 of the IPA concentration reducing device 10.
- the process exhaust stream passes through the electrostatic dust collecting unit 12, where the IPA particles combined with the mist and the double mist are collected by the electric dust collecting unit to perform the primary IPA abatement process for lowering the concentration of IPA in the process exhaust stream .
- the electrode of the electric dust collecting unit 12 can be cleaned by spraying the washing water periodically.
- the secondary IPA abatement process is performed.
- water is injected into and contacted with a filter passing through the process exhaust stream.
- the water circulated in the first water receiving unit 17 is circulated by the first circulation unit 19, .
- the concentration of IPA is maintained at a concentration of 4 ppm or less, which is the first concentration value, in the first receiving portion 17. If the IPA concentration of the water contained in the first receiving portion 17 exceeds the first concentration value, the water overflowing from the second receiving portion 31 is replenished while discharging the water through the water outlet 171 Receive.
- the second receiving portion 31 of the wet scrubber 30 is replenished with fresh water from the water replenishing line 40 to maintain a relatively low IPA concentration (for example, 0.5 ppm or less)
- the water overflows the partition wall between the second receiving unit 31 and the first receiving unit 17 and is transferred to the second receiving unit 31.
- the first water receiving portion 40 is connected to the first water receiving portion 31 through the water replenishing line 40, irrespective of the IPA concentration of the water contained in the second receiving portion 31.
- the process exhaust stream which has been treated in the IPA concentration reducer 10 and delivered to the wet scrubber 30 contains IPA at a low concentration and the packing is contacted with water while passing through the stacked water contact area 33, To treat the harmful substances contained in the stream in a tertiary manner.
- the water contained in the second water receiving part 31 is circulated and injected by the second circulation part 35.
- the process exhaust stream treated in the wet scrubber 30 is lowered to the target value by the toxic substances including the IPA, and is discharged to the outside through the gas discharge portion 37.
- the system of the present invention as described above can remarkably reduce the generation of wastewater by treating the IPA stream in a multistage and simultaneously using the water used for the treatment of the low concentration IPA stream in the treatment of the high concentration IPA stream.
- Figure 4 shows the results of testing the efficiency of the processing system of the process exhaust stream comprising the IPA of the present invention.
- the concentration of IPA is lowered in each mist spraying, electrostatic dust collecting, and wet scrubber treatment, and the IPA concentration finally decreases to the target value. Therefore, it can be seen that IPA treatment is possible efficiently while using a small amount of water.
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Abstract
Description
Claims (13)
- IPA를 포함하는 공정 배기 스트림의 처리 시스템으로서:공정 배기 스트림 중 적어도 IPA 농도를 저감시키는 IPA 농도 저감기; 및상기 IPA 농도 저감기에서 처리된 공정 배기 스트림을 전달받아 처리하는 습식 스크러버;를 포함하는, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 1에 있어서, 상기 IPA 농도 저감기는:공정 배기 스트림에 물을 미스트로 분사하는 분무부; 및상기 분무부로부터 전달되는 공정 배기 스트림 중 미스트 및 미스트 결합된 성분을 집진하는 전기 집진부;를 포함하는, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 2에 있어서,상기 IPA 농도 저감기는 상기 전기 집진부로부터 전달받은 공정 배기 스트림을 습식 필터 처리하는 습식 필터부를 더 포함하는, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 3에 있어서,상기 IPA 농도 저감기는 적어도 상기 습식 필터부에서 사용되는 물이 수용된 제1수조부를 더 포함하는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 4에 있어서, 상기 습식 스크러버는:제2수조부;상기 제2수조부 상에 배치되어 공정 배기 스트림과 상기 제2수조부의 물이 접촉하는 물 접촉 영역;상기 제2수조부 내의 물이 상기 물 접촉 영역에서 공정 배기 스트림과 접촉하도록 순환시키는 제2순환부; 및처리된 공정 배기 스트림을 배출하는 가스 배출부;를 포함하는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 4에 있어서,상기 제2수조부는 용수 보충라인이 연결되어, 수용된 물이 일정 수위 이상이 되면 오버플로우 되는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 6에 있어서,상기 제1수조부는 상기 제2수조부로부터 오버플로우 되는 물을 전달받고,상기 습식 필터부에서는 상기 제1수조부의 물이 순환되어 분사되는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 7에 있어서,상기 제1수조부에 수용된 물은 IPA에 대한 농도가 제1농도값 이하로 유지되고,상기 제2수조부에 수용된 물은 IPA에 대한 농도가 상기 제1농도값 보다 낮은 제2농도값으로 유지되는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- IPA를 포함하는 공정 배기 스트림의 처리 시스템으로서:공정 배기 스트림 중에서 적어도 IPA 농도를 저감시키는 IPA 농도 저감기; 및상기 IPA 농도 저감기에서 처리된 공정 배기 스트림을 전달받아 처리하는 습식 스크러버;를 포함하고,상기 IPA 농도 저감기는 상기 습식 스크러버에서 사용된 물을 전달받아 사용하는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 9에 있어서,상기 IPA 농도 저감기는 제1수조부와 상기 제1수조부의 물이 순환되어 공정 배기 스트림과 접촉되는 습식 필터부를 포함하고,상기 습식 스크러버는 제2수조부와 상기 제2수조부의 물을 순환되어 공정 배기 스트림과 접촉되는 물 접촉 영역을 포함하는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 10에 있어서,상기 제1수조부와 상기 제2수조부에 수용된 물은 각기 정해진 IPA 농도로 유지되고,상기 제2수조부는 상기 제1수조부 보다 IPA 농도가 낮게 유지되는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 10에 있어서,상기 제1수조부와 상기 제2수조부에 각각 수용된 물의 각각 정해진 IPA 농도로 유지하기 위해, 상기 제2수조부에는 용수 보충라인이 연결되고, 상기 제1수조부에는 용수 배출구가 형성된 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
- 청구항 9에 있어서,상기 IPA 농도 저감기는 공정 배기 스트림에 물을 미스트로 분사하는 분무부와, 상기 분무부로부터 전달되는 공정 배기 스트림 중 미스트 및 미스트 결합된 성분을 집진하는 전기 집진부를 더 포함하는 것인, IPA를 포함하는 공정 배기 스트림의 처리 시스템.
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CN201780094099.8A CN111093806A (zh) | 2017-08-31 | 2017-12-08 | 含ipa的工程排气流的处理系统 |
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KR1020170110784A KR101984814B1 (ko) | 2017-08-31 | 2017-08-31 | Ipa를 포함하는 공정 배기 스트림의 처리 시스템 |
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KR101984814B1 (ko) | 2019-05-31 |
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