• 제목/요약/키워드: Ceramic Candle Filter

검색결과 31건 처리시간 0.029초

세라믹캔들필터 집진 전후 Ash의 크기 및 분포에 관한 연구 (A study on Ash size and its distribution on cleaning of ceramic candle filter)

  • 정진도;이중범;김종영
    • 대한기계학회논문집B
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    • 제20권5호
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    • pp.1639-1648
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    • 1996
  • Protection of gas turbine blade from its erosion and abrasion at high temperature and pressure is the first goal to cleanup the hot gas upstream for IGCC and PFBC. Ceramic filters represent an attractive technology for particle removal at high temperature and high pressure condition. They have demonstrated being a good system for improvement of thermal efficiency and reduction of effluent pollutants in advanced coal-based power systems such as IGCC and PFBC. Ceramic filter elements currently being developed were evaluated in the previous paper. In this paper, we measured the ash size and distribution on cleaning of ceramic candle filter. The results are as follows : in this experimental range, ceramic candle filter was shown to be fully adequate for the removal process of dust under high temperature and pressure. Also filtration efficiency of ceramic candle filter was higher than 98% compared with the regulation limit of particle size in gas turbine inlet.

산화구리 촉매담지 세라믹 캔들필터를 이용한 NO 제거 (Removal of NO Using CuO/3Al2O3 · 2SiO2 Catalyst Impregnated Ceramic Candle Filters)

  • 홍민선;문수호;이재춘;이동섭
    • 한국대기환경학회지
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    • 제20권3호
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    • pp.291-302
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    • 2004
  • The CuO/$3AL_2O_3{\cdot}2SiO_2$ catalyst impregnated ceramic candle filters for nitrogen oxides removal were prepared by porous mullite($3AL_2O_3{\cdot}2SiO_2$) support and CuO catalyst deposited on this support to achieve uniformly dispersed CuO deposition, which are impregnated into the pores of available alumino-silicate ceramic candle filter. The CuO/3$AL_2O_3{\cdot}2SiO_2$ catalyst impregnated ceramic candle filters were characterized by XRD, BET, air permeability, pore size, SEM and catalytic tests in the reduction of NOx by NH$_3$. The observed effects of CuO/3$AL_2O_3{\cdot}2SiO_2$ impregnated ceramic candle filters in SCR reaction are as follows : (1) when the content of CuO catalyst increased further, activity of NO increased. (2) NO conversion at first increased with temperature and then decreased at high temperatures (above 40$0^{\circ}C$), possibly due to the occurrence of the ammonia oxidation reaction. (3) In pilot plant test for 3 months, NO conversion was greater than 90%.

바나디아 촉매담지 세라믹 캔들필터를 이용한 질소산화물 제거기술 (Removal Technology of NOx Using V2O5/TiO2 Catalyst Impregnated Ceramic Candle Filters)

  • 이동섭;박진식
    • 한국환경과학회지
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    • 제16권9호
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    • pp.1077-1083
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    • 2007
  • [ $V_2O_5/TiO_2$ ] catalyst impregnated ceramic candle filters are in principle, capable of performing shallow-bed dust filtration plus a catalytic reaction, promoted by a catalytic deposited in their inner structure. Pilot-scale $V_2O_5/TiO_2$ catalyst impregnated ceramic candle filters were prepared, characterized and tested for their activity towards the SCR reaction. The effect on NO conversion of operating temperature, gas hourly space velocity, amount of deposited catalyst, pressure drops and long-term experiment (life of catalytic filter) was determined. The following effects of $V_2O_5/TiO_2$ catalyst impregnated ceramic candle filters in SCR reaction are observed: (1) It increases the activity and widens the temperature window for SCR. (2) When the content of $V_2O_5$ catalyst increases further from 3 to 9wt.%, activity of NO increases. (3) NO conversion at first increases with temperature and then decreases at high temperatures (above $400^{\circ} over), possibly due to the occurrence of the ammonia oxidation reaction.

진공 압출성형 및 래밍성형 공정에 의한 탄화규소 캔들 필터 제조 및 특성 (Fabrication and Properties of the SiC Candle Filter by Vacuum Extrusion and Ramming Process)

  • 신명관;한인섭;서두원;김세영;우상국;이승원;김영욱
    • 한국세라믹학회지
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    • 제46권6호
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    • pp.662-667
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    • 2009
  • Porous SiC candle filter preforms were fabricated by extrusion and ramming process. To fabricate SiC candle filter preform, commercially available 85 ${\mu}m\;{\alpha}-$-SiC powder and 44 ${\mu}m$ mullite, CaC$O_3$ powder were used as the starting materials. The candle type preforms were fabricated by vacuum extrusion and ramming process, and sintered at $1400{^{\circ}C}$ 2 h in air atmosphere. The effect of forming method on porosity, density, strength (flexural and compressive strength) and microstructure was investigated. Also, corrosion test of the sintered candle filter specimens as forming method was performed at $600{^{\circ}C}$ in IGCC syngas atmosphere. The sintered SiC filter which was formed by ramming process has more higher density and exhibit higher strength than extruded filter. Its maximum density and 3-point bending strength were 2.00 g/$cm^3$ and 45 MPa, respectively.

진공 압출성형 및 래밍성형 공정에 의한 탄화규소 캔들 필터 제조 및 특성 (II) (Fabrication and Properties of SiC Candle Filter by Vacuum Extrusion and Ramming Process (II))

  • 한인섭;서두원;김세영;홍기석;우상국;김영욱
    • 한국세라믹학회지
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    • 제47권6호
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    • pp.515-523
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    • 2010
  • Porous SiC candle filter preforms were fabricated by extrusion and ramming process. To fabricate SiC candle filter preform, commercially available F180 mesh ($85\;{\mu}m$) $\alpha$-SiC powder and $44\;{\mu}m$ mullite, $CaCO_3$ powder were used as the starting materials. The candle type preforms were fabricated by vacuum extrusion and ramming process, and sintered at $1400^{\circ}C$ 2 h in air atmosphere. Corrosion test of the sintered candle filter specimens as forming method was performed at $600^{\circ}C$ for 2,400 h in simulated IGCC syngas atmosphere. The effect of forming method on mechanical properties, pore distribution, microstructure and crystalline phase was investigated.

세라믹 캔들 필터 주위의 분진 속도분포 측정 (Measurements of Dust Velocity Field around the Ceramic Candle Filter)

  • 고용서;정진도;김승태
    • 청정기술
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    • 제5권1호
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    • pp.30-41
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    • 1999
  • 본 연구는 독일 Schumacher사의 1m 크기의 세라믹 캔들 필터가 1개 설치된 실험장치를 구성하여 집진시 단일 필터 주위에서의 분진 속도분포를 PDPA를 이용하여 측정하고, 분진층의 유무와 분진 투입 위치에 따른 분진 속도분포의 변화를 관찰하였다. 측정 결과 집진이 계속되어 필터 표면에 분진층이 발달함에 따라 집진 속도가 감소됨을 알 수 있었다. 특히, 투입구가 위치하는 필터표면에서 집중적으로 분진층이 발달하여 이곳에서의 분진 속도 감소가 크게 나타났다. 그리고 필터 내부와 압력용기부사이의 압력 차에 의한 필터 표면에서의 분진 속도 평균값은 0.28m/sec 이었다. 또한 분진 투입을 압력용기부 하단에 위치한 투입구로 투입하였을 때 필터 주위의 분진의 고른 속도분포를 관찰할 수 있었다.

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분진 유입 방식에 따른 세라믹 캔들 필터 집진장치의 집진 및 탈진 특성 비교 연구 (Comparison Research of Filtration and Regeneration Characteristics of Ceramic Candle Filter System at Different Inflow Pattern of Dusty Gas)

  • 박석주;임경수;임정환
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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    • pp.341-344
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    • 2008
  • Computational studies have been performed to analyze the particle loadings onto the filters according to the different inflow pattern of dusty gas and the flow uniformities on the filter surface of back-blown gas at different permeability of porous media setup at the filter outlet. This is preliminary study to find how we can reduce the regeneration time and improve the regeneration efficiency of filters with dust layer.

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한국형 IGCC 대용량 집진시스템 개발 (Development of Filtration System for Korean Model IGCC Demonstation Plant)

  • 박석주;임경수;임정환
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2007년도 춘계학술대회
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    • pp.812-815
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    • 2007
  • Computational simulation has been performed to design the filtration system for Korea model IGCC demonstration plant. The filtration system for optimal design has four effective filters corresponding to the clusters composed of a group of ceramic candle filters. It was analyzed how the different entrance geometry influences the flow field and the particle behavior in the filtration system. The particle loading is minimum when the gas mixed with particles flows into the filter vessel with a shroud tube through a tangential inlet. However, the particle loading is maximum when the gas with particles enters the filter vessel through a normal inlet which a entrance tube extended from. By controling adequately both conditions of inflow, the filtration system can be operated optimally to prolong the filter life-time and to save the energy for cleaning filters.

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Performance of a Group Candle Filter in a Hot Bench Unit

  • Park, Joo-Hong;Park, Gyung-Won
    • 에너지공학
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    • 제8권1호
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    • pp.143-149
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    • 1999
  • The mounting technology of ceramic candle elements utilizing disk spring was tested in a hot bench unit. Seven SiC candle elements were fixed in three groups by 2, 2, and 3 elements per group. And its performance was investigated in a hot gas stream using oil burned-exhaust gas. The experimental results showed that this mounting method gave a good performance enough to be useful for the particulate removal in the integrated gasification combined cycle (IGCC). Some operational characteristics of the groupfilter were observed.

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IGCC용 세라믹캔들필터 집진장치에서의 가스 유입 및 탈진 조건에 따른 차압 특성 변화 (Difference of Pressure Drop through Ceramic Candle Filter System for IGCC according to Inflow and Regeneration Conditions)

  • 박석주;임경수;임정환
    • 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.

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