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손재익,박영옥,임정환,서정민,김상도,박석주,최호경,박현설 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.4
소결금속섬유필터에 대한 압력손실, 먼지통과율, 부분집진효율 등의 기초 여과성능특성을 수행하였다. 두 종류의 필터가 적용되었고, 두 필터의 공극률 및 두께는 동일하고, 통기도와 여과정밀도는 다른 물리적 특성을 가지고 있다. 기초성능특성은 300×300 ㎜크기의 필터를 실험할 수 있는 필터성능실험장치를 가지고 조사하였다. 시험용 먼지로는 AC fine dust가 사용되었다. 압력손실은 여과속도와 먼지부하가 증가함에 따라 증가하였다. 먼지층 형성 초기 단계에는 여과포의 공극내에서 단일섬유 주위에 먼지입자가 응집되어 수지상 형태로 부착형성되었고, 먼지부하가 증가하여 가교형성에 의해 먼지층 형성이 진행된다. 균일먼지층 형성단계는 먼지부하가 계속 증가하여 먼지층 형성에 의해 여과포의 공극이 완전히 채워지고, 여과포 전체표면에 먼지층이 일정하게 포집되는 단계로 진행되었다. 먼지통과율은 먼지부하 초기단계에는 여과속도 증가에 따라 급격하게 증가하였고, 먼지부하가 증가함에 따라 급격하게 감소하였다. 압력손실 및 먼지통과율은 먼지부하 및 여과속도와 같은 운전변수로 상관관계식을 도출하였다. 상관관계식으로부터 계산된 압력손실 및 먼지통과율은 실험치와 잘 일치함을 알 수 있었다. 부분집진효율은 먼지부하에 따라 증가하였다. Basic filtration characteristics including pressure drop, penetration and fractional collection efficiency were investigated for sintered metal fiber filters. Two filters were applied. It was found that the porosity, weight and thickness were same, the air permeability and filtering accuracy were different. The performance test of fabric filter was investigated using a flat sheet filter testing unit, which can be applied to the filter of 300×300 ㎜ size. The test dust was AC Fine Dust. The pressure drop increased with filtration velocity and dust loading. The initial stage of dust cake formation was a growing process of particle dendrites on a single filament in the pore and the second stage was a bridge formation process with increasing dust loading. The final stage was a process of constant deposition of dust on a fabric surface under heavy dust loading conditions. The penetration sharply increased with filtration velocity in the intial stage of dust loading. It sharply decreased with dust loading, but the rate of decrease gradually diminished under heavy dust loading conditions. The pressure drop and penetration have been correlated in terms of operating variables such as dust loading and filtration velocity. The pressure drop and penetration calculated from the correlation equation have been compared with the experimental data and the agreement between the two data was fairly good. The fractional collection efficiency increased with dust loading.
손재익,김영성,박영옥,정태수 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.4
산업체 석탄연소 보일러 배가스의 분진처리를 위하여 고온용 유리섬유 여과포의 석탄회 포집특성을 조사하였다. 미국 Burlington사의 수입 여과포와 국내 강남산업에서 최근 개발한 국산 여과포를 대상으로 bench scale 시험 장치에서 여과속도와 분진부하 등에 따른 분진층의 형성과정을 관찰하고 압력손실을 측정하였다. 수입여과포에 비하여 국산여과포의 공극형태가 다소 불완전하고 따라서 압력손실도 낮았으나 두 여과포의 상대적 차이는 분진부하가 증가할수록 감소하였다. Collections of coal fly ash by high-temperature glassfiber fabrics were tested aiming at control of particulates from industrial coal-fired boilers. Growth of dust deposition and pressure drop were investigated by varying filtration velocity and dust loading at a bench-scale test unit. Characteristics of fabrics recently developed by Kangnam Ind. Co. (KN-448) were compared by those of imported fabrics manufactured by Burlington Glass Fabrics Co. (BT-448). Pores of KN-448 were not so complete and uniform as those of BT-448 and pressure drop across KN-448 was lower than that across BT-448. However relative difference of pressure drops between the two fabrics was reduced with increasing dust loading.
이영우,손재익,박영옥 忠南大學校 産業技術硏究所 1997 산업기술연구논문집 Vol.12 No.1
A neutralized fabric filter was characterized in terms of pressure drop, penetration and figure of merit in a pilot scale test unit for two kinds of ash dust generated from coke manufacturing process of steel industries (coke ash) and clinker calcination process of cement industries (clinker ash). Effects of filtration velocity, cleaning method, pulse jet cleaning pressure, and bag cage type on the characterizing items were investigated. In order to perform an effective cleaning operation and continuous dust collection for both of dust filtrations, the filtration velocity and poulse jet cleaning pressure should be kept above 1.0m/min and 4.0kg/㎠ respectively. The suitable cleaning interval and dust loading for the coke dust filtration were 4 minutes and 120-200g/㎡, and under these conditions the pressure drop and dust penetration could be maintained below 30mmH₂O and 0.5%, respectively. Also, the suitable cleaning interval for the clinker dust filtration was 1 hour, and under this condition the pressure drop and dust penetration could be maintained below 90mmH₂O and 0.5%, respectively. A visual analysis for dust penetration phenomena suggested that a reinforcement be needed for the bag filter in the region of 70cm below the top of the bag cage, especially below the venturi.