• 제목/요약/키워드: Air-purification

검색결과 232건 처리시간 0.022초

접착제 취급 작업장 내 공기정화 설비를 이용한 휘발성 유기화합물 저감 평가 (Assessment of Volatile Organic Compound Reduction Using an Air Purification Facility in an Adhesive Handling Process)

  • 우재민;김동준;신지훈;민기홍;이채관;양원호
    • 한국환경보건학회지
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    • 제49권2호
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    • pp.78-88
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    • 2023
  • Background: Exposure to volatile organic compounds (VOCs) can have acute and chronic health effects on human beings in general and in working environments. In particular, VOCs are often emitted in large quantities in industrial settings. In such circumstances, there is a need to improve the indoor air quality at workplaces. Objectives: The purposes of this study were to verify the effectiveness of air cleaning devices in workplaces and provide alternative solutions for improving working environments. Methods: Personal exposure and area level of VOCs for workers were evaluated in a car-part adhesive process before and after installing an air cleaning device with a TiO2-coated filter. Passive samplers and direct reading instruments were used to collect and analyze the VOCs, and the removal efficiency and improvement of air quality were evaluated. We also calculated the exposure index (EI) to assess the risk level in the workplace. Results: The removal efficiency for VOCs through the installation of the air cleaning device was approximately 26.9~69.0% as determined by the concentration levels before and after installation. The measured substances did not exceed the exposure limits for the work environment and the EI was less than 1. However, carcinogenic substances such as benzene, formaldehyde, carbon tetrachloride, and trichloroethylene were detected. Conclusions: The application of an air cleaning device can be a solution for controlling the indoor air quality in a workplace, particularly in cases where ventilation systems cannot be installed due to process limitations.

선 대 평판형 플라즈마 반응기 제작을 위한 전위 및 전계 해석 (Simulation of Electric Potential and Electric Field for Wire-Plate Type Plasma Reactor Manufacture)

  • 이동훈
    • 전기학회논문지P
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    • 제52권4호
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    • pp.167-171
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    • 2003
  • Due to advancement of industrialization, the flue gas from the combustion of industrial factories and various means of transportation have polluted air. Therefore, it is necessary to develop new techniques of air purification. In order to produce a more effective reactor, simulation were conducted using the Flux-II D program. The condition of the simulation were as follows: The height of the plate electrode was 0 mm or 2 mm higher than that of the wire electrode. The distance between the electrodes was 12 mm, and the diameter of the wire electrode was 0.5 mm or 1.0 mm. The results of the electric potential and electric field simulations show that pollutants will be more effectively removed due to the dielectric strength between wire electrode and plate electrode which was strong, and wire electrodes which were concentrated in a high electric field.

아두이노를 이용한 공기청정 기능을 탑재한 로봇청소기 (Robot Vacuum Cleaner with Air Purification based on Arduino)

  • 박명철;임혜진;심인보
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2019년도 제59차 동계학술대회논문집 27권1호
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    • pp.233-234
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    • 2019
  • 전 세계적으로 미세먼지는 심각한 사회문제이다. 우리나라 또한 중국의 미세먼지와 디젤 자동차 급증 등에 의한 오염으로 인하여 호흡 시 들이마시는 공기의 질이 많이 나빠지고 있는 추세이다. 이로 인해 집 안의 환기를 위해 창문을 열거나 외출 후 귀가했을 때 옷에 붙은 미세먼지들에 의하여 집 안에 미세먼지가 쌓이게 됨으로써 건강을 위협할 수 있는 요소가 된다. 이러한 문제점들을 해결하고자 청소뿐만 아니라 공기청정 기능도 수행하게 되는 효율적인 측면을 가진 공기청정 기능을 탑재한 로봇청소기를 개발하였다. 따라서 본 논문에서는 로봇청소기의 초음파 센서와 미세먼지를 사용하여 자동으로 로봇청소기와 공기청정 기능을 탑재한 로봇청소기에 대한 연구 결과에 관해 기술하였다.

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HFCLM Purification of SO2 from Flue Gas

  • Cha, Jun-Seok;K.K.Sirkar
    • 한국대기환경학회:학술대회논문집
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    • 한국대기환경학회 1997년도 한국대기보전학회 춘계학술대회 요지집
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    • pp.135-137
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    • 1997
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중공사 정밀여과막을 이용한 상수처리용 일체형 시스템 개발 (Submerged Type Water Purification System using Hollow Fiber Microfiltration Membrane)

  • 정규영;김형수;임종성
    • 한국수자원학회논문집
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    • 제32권3호
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    • pp.311-319
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    • 1999
  • 기존의 정수처리 공정인 응집 ·침전·모래여과를 단일 공정인 막분리 공정으로 대체하기 위한 중공사 정밀여과막의 적용 가능성을 검토하였다. 실험은 우선 실험실 규모의 실험에서 여러 가지 운전인자에 대한 수질의 안정성 및 장기 운전 가능성을 검토하였고, 여기에서 최적 운전인자로 얻어진 투과플럭스 0.03m/h, 10분 여과, 2분 정지 (30초간 air scrubbing 세정 포함)의 조건으로 20m3/일 규모의 Pilot Plant를 1년 이상 운전하여 안정성을 검증하는 방법으로 수행되었다. 탁도, SS등 막 투과수 수질은 전 실험 기간 동안 탁월한 제거효율을 나타내었다. 따라서 정수처리 공정에의 중공사 정밀여과막을 이용한 막분리 공정은 적용 가능하다고 판단된다.

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재생골재를 사용한 포러스 콘크리트의 수질정화 특성에 관한 실험적 연구 (An Experimental Study on Water-Purification Properties of Porous Concrete Utilizing Recycled Aggregate)

  • 김정환;조광연;조청휘;이봉춘;박승범
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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    • pp.925-928
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    • 2001
  • Recently great efforts and investment have been made in order to achieve economical production by applying new methods like minimization of man-Power into construction field. This paper describe the performance of water purification, to which living organisms can adapt, and the physical properties of porous concrete with continuous voids. Although conventional concrete has been regarded as a destroyer of nature, water and air can pass freely through concrete when it is made porous by forming continuous voids. this not only enables plants to vegetables, but also makes it possible for microscopic animals and plants, including bacteria, to attach to and inhabit uneven surface as well as internal voids when the concrete is provided in a natural water area or waterside area. As a result, Porous concrete using recycled aggregate improved the performance of water purification.

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오존 정화시스템을 이용한 축사내 공기정화 효과 (Germicidal Effect of Ozone Cleaning System for Pigpens Air)

  • 원승호;김영권
    • 한국태양에너지학회 논문집
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    • 제30권1호
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    • pp.13-18
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    • 2010
  • This research investigated the exhaust gas purification system of gaseous ozone for pigpens. This system is applied to exhaust the gas outside after purification with ozone. This is very effective for purification and simple. And because this is not set in the pigpens, this system is not influence of pollution gas. This is effected to extend the life time of this system and this system is applied for non-window pigpens which does not need the ventilation.

천연가스 자동차의 Emission 배출특성 및 저감법 (Emission characteristics of Natural Gas Fueled Vehicl and its Purification Technologies)

  • 최병철;이지연;손건석;이귀영
    • 한국자동차공학회논문집
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    • 제5권2호
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    • pp.127-135
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    • 1997
  • Experiments have been conducted to investigate emission characteristics of compressed natural gas fueled vehicle(CNGV) by the FTP 75 mode test. Its purification technologies were also investigated. It was found that CNGV was operated on the rich A/F condition by comparison with gasoline vehicle. The Pd catalyst was higher in methane purification performance than Pt and Pd/Pt/Rh catalysts. Up to 60% portion of the accumulative HC emissions(that contains above 80% methane) form CNGV occurs during the first phase of the FTP 75 mode. CO that is exhausted at rich conditions of the air-fuel ratio more than lean conditions should be used for the catalytic reduction of NOX, because the methane is not the effective reduction for NOX in the CNGV with 3-way catalyst system.

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굵은골재 최대치수 40 mm 투수 콘크리트의 물리적 특성과 질소산화물 제거에 관한 연구 (An Experimental Study on NOx Degradation Efficiency and Physical Characteristics of Maximum Size 40 mm Porous Concrete)

  • 홍종현;김문훈;류성필;정광옥
    • 한국환경과학회지
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    • 제15권5호
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    • pp.431-438
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    • 2006
  • The strength, water permeability, and photo-degradation efficiency of NOx of porous concrete with a new concept were studied in this paper. The porous concrete was comprised of coarse aggregate of maximum size 40 mm, cement, silica fume, water and air-entraining(AE) water reducing agent. The strength of porous concrete was strongly related to its matrix proportion and compaction energy. An experimental test was carried out to study the parameters of cement proportions and silica fume content for pavement applications of porous concrete which were paving a footpath, a bikeway, a parking lot, and a driveway. The regressed equations of relation-ships between compressive strength and flexural strength, and coefficient permeability and void ratios were indicated as y=7.69x+71.74 and $y=0.42e^{0.28x}$. A method of making an air purification-functioning road, which was spraying a mixture of a photocatalyst, cement, and water onto the surface of the road, was suggested.

이산화티타늄을 이용한 대기정화 블록의 질소산화물 제거 성능 평가 (Performance Evaluation of Nitrogen Oxide Removal by Air Purification Blocks with Titanium Dioxide)

  • 오리온;김황희;박성기;차상선;박찬기
    • 한국농공학회논문집
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    • 제62권5호
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    • pp.39-46
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    • 2020
  • This study evaluated the nitrogen oxide (NOx) removal efficiency by air purification concrete blocks with titanium dioxide (TiO2). The concrete in the mixtures had a 30% water:cement ratio, to which TiO2 was added at 0%, 5%, and 10% of cement weight. The compressive strength reduction rate and removal efficiency of NOx were investigated. The result of the compressive strength test in the study indicated that addition rate of TiO2 did not lead to signifcant effect. In terms of the average removal efficiency of NOx, mix No. 1 using a TiO2 mixing ratio of 0% had a removal efficiency of 0.57% on average; thus, the removal effect w as not significant. For the other samples prepared by mixing, the average removal efficiencies for mix No. 2 (5% TiO2) were 58.86% and 62.05% for normal and washing surface treatments, respectively, and those of sample No. 3 (10% TiO2) were 59.94% and 67.61%. mixs No. 4 (5%) and No. 5 (10%), in which TiO2 diluted with distilled water was sprayed onto the block surface, had an average NOx removal efficiency of 61.72% and 68.48%, respectively. In terms of NOx removal efficiency, Mixs No. 3 and No. 5 with 10% TiO2 were better than Mixs No. 2 and No. 4 with 5% TiO2. In addition, analyzing the NOx removal efficiency results from the fixing method, it was capable to apply mixing (washing) and the diluted spray methods. Therefore, it was found that the diluted spray method applied in this study can be employed in any manufacture of air purification concrete blocks.