• Journal of Energy Engineering
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• 제15권3호
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• pp.146-153
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• 2006

A performance test of the stainless steel based sintered metal filter was conducted on the low and intermediate level radioactive waste (LILW) vitrification process. The applicability of the metal filter was based on the test results as well. The baseline pressure drop of the metal filter was evaluated similar to the ceramic filter. During the test, when the flow rate of off-gas was $110Nm^{3}/h$, the total baseline pressure drop was shown as $92mmH_{2}O$. The total pressure drop was attributed to the filter media and the residual dust layer and the value of each was $25mmH_{2}O\;and\;67mmH_{2}O$ respectively. The SEM-EDS spectrum and micrograph of the metal filter specimen showed, no corrosion and no physical damage both at the skin membrane and at the support layer. And most of the baseline pressure drop was caused by the deposition of dust on the surface of the membrane. In conclusion, even though the filter exposure time was short at the test, the performance of the stainless steel based metal filter was acceptable for the treatment of LILW vitrification process.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 한국방사성폐기물학회 2004년도 학술논문집
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• pp.334-335
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• 2004

It is important that the contaminated air is not revealed to the outside of the facility. The inside of the facility should be classified into several zones according to the radioactivity and each zone should maintain tile differential negative pressure between the zones also. It is not easy to equilibrate the pressure during the operation. On the normal operation, the clogging of the HEPA filter and the opening of the doors/shutters influence very much. We could maintain the differential negative pressure between the zones by the constant watching and periodical replacement of the filters.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 추계학술대회 논문집
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• pp.246-249
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• 2008

IGCC (석탄가스화 복합발전) 시스템 공정 중 가스화기에서 발생되는 합성가스 내에는 높은 농도의 분진들이 함유되어 있기 때문에 하부 공정들을 보호하기 위해서는 가스화기 후단에 집진장치가 필히 설치되어야 한다. 집진장치의 설계 제작 운전에 있어서 점착성 분진층 부착,분진 브리징, 필터 파손 현상 등과 같은 다양한 문제점들로 인하여 고온의 합성가스를 처리하는 데는 아직 기술적 한계들이 산재해 있는 상황이다. 이와 같은 문제점들은 필터에 부착된 분진층의 탈진성능을 향상시키거나, 필터의 열피로를 줄일 수 있도록 필터 재생을 위한 탈진의 횟수를 줄이는 방법을 통하여 해결될 수 있다. 본 연구에서는 파일롯 규모의 IGCC용 세라믹캔들필터 집진장치에서의 가스 유입 및 탈진 조건에 따른 집진장치의 차압 특성 변화를 수치해석과 실험을 통하여 분석함으로써 탈진성능을 향상시킬 수 있는 조건과 탈진 횟수를 최소화시킬 수 있는 방안을 도출하고자 하였다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 한국대기환경학회 1999년도 추계학술대회 논문집
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• pp.244-245
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• 1999

고온 집진을 위한 세라믹 필터의 개발은 1980년대 이후 유럽을 중심으로 활발한 연구가 수행되고 있으며 기존 대기오염 방지 시설로는 처리가 불가능한 고온 공정에 상용화 되어 있고 국내에도 비철금속, 탄화공정, 유리 용해로 등의 공정에 세라믹 필터을 이용한 고온 집진 공정이 설치되어있다. 본 연구에서는 국내에서 개발한 저밀도 세라믹 필터를 이용해 300~$600^{\circ}C$의 고온에서 장시간 실험을 수행 하였으며 장기 집진시 차압과 효율 그리고 세라믹 필터의 특성 변화를 관찰하였다.(중략)

• Journal of the Korean Institute of Gas
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• 제2권1호
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• pp.47-52
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• 1998

To eliminate foreign substance like metal rust and sand in natural gas pipeline, 250um strainer filter is used present in Korea Gas Corporation. But particles smaller than 250um passing the filter have bad effects to the valves and the measuring equipments. In order to eliminate small paticle in the pipeline, it is necessary to cut down the pore size of filter When we cut down the pore size of filter, the pressure difference between the front of filter and that of the rear part is increasing and disturb normal condition of gas supply. So it is very important to control the condition between the pore size of filter and the pressure difference. In this study, using head loss coefficient K, the estimation method of efficiency of gas filter according to the pore size and the pressure difference is presented.

• Proceedings of the Korean Fiber Society Conference
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• 한국섬유공학회 2007년도 학술발표회 논문집
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• pp.439-440
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• 2007

See Full Text

• Proceedings of the Korean Radioactive Waste Society Conference
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• 한국방사성폐기물학회 2006년도 학술논문요약집
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• pp.105-106
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• 2006

• Proceedings of the Korea Air Pollution Research Association Conference
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• 한국대기환경학회 2003년도 추계학술대회 논문집
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• pp.531-532
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• 2003

공작기계 가동시 윤활과 냉각 등의 목적으로 다양한 종류의 금속가공유 (MWFs : 절삭유, 윤활유, 방청유 둥)를 사용하고 있다. MWFs에는 포름알데히드, 니트로스아민, 염화파라핀 등의 발암물질이 포함되어 있는 것으로 알려져 있어 작업자 건강보호를 위해 효율적인 환기가 요구되고 있다. 현장에서 가장 많이 사용하고 있는 포켓 필터형 오일미스트 콜렉터는 제진 장치가 없기 때문에 필터 표면에 한번 부착된 오일 미스트와 먼지가 떨어지지 않기 때문에 일정시간 후 필터 표면에 막힘 현상이 발생한다. 필터 표면이 막히면 차압 증가와 함께 송풍량이 감소하기 때문에 미스트 제거 효율이 크게 저하되고, 결과적으로 오일미스트의 환기 효율이 크게 감소된다.(중략)

• Applied Chemistry for Engineering
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• 제19권1호
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• pp.80-85
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• 2008

Catalytic filter is capable of performing shallow bed dust filtration plus a catalytic reaction, promoted by a catalyst deposited in its inner structure. Such a feature may allow potential cost and space reduction in several environmental applications. Dust filtration and halogenated volatile organic compound (1,2-dichlorobenzene) destruction were carried out in a lab-scale reactor. $WO_3-V_2O_5/TiO_2$ supplied by MaGreen, which showed high catalytic acitivity at low temperature, was used as a catalyst. P-84 that can be operated under $250^{\circ}C$ was used as a felt. The catalytic activity and filtration efficiency of catalytic filters were investigated under the operating conditions, including temperature, face velocity, and dust concentration. The catalytic activity of catalytic filter increased with increasing temperature and the amount of catalyst loaded. The test results showed that the filtration efficiency was primarily affected by the face velocity. Pressure drop variations as a function of time were investigated for a variety of conditions. In case of virgin filter, a dramatic decrease in the pulse interval and a slightly increase in the base line pressure drop were observed. A relatively slow pressure drop build-up was recorded for the catalytic filter due to smooth and slippery surface characteristics of nanofiber. The catalytic filter indicated that high filtration efficiency over 99.98% and high catalytic activity over 90% at 1 m/min and $210^{\circ}C$.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• 제2권3호
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• pp.201-209
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• 2004

Important operation parameters and performance of a high temperature ceramic candle filter system were evaluated through a series of demonstration tests at a pilot-scale vitrification plant. At the initial period of each test, due to the growth of dust cake on the surface of ceramic candles, the pressure drop across the filter media increased sharply. After that it became stable to a certain range and varied continuously proportion to the face velocity of off-gas. On the contrary, at the initial period of each test, the permeability of filter element decreased rapidly and then it became stable. Back flushing of the filter system was effective under the back flushing air pressure range of 3∼5 bar. Based on the dust concentrations measured by iso-kinetic dust sampling at the inlet and outlet point of HTF, the dust collection efficiency of HTF evaluated. The result met the designed performance value of 99.9%. During the demonstration tests including a hundred hour long test, no specific failure or problem affecting the performance of HTF system were observed.