전기 다층 다단 다공성 플레이트 시스템의 집진 특성에 관한 연구

Abstract

본 연구에서는 필터 의존도를 최소화 하면서 대유량을 고효율로 처리할 수 있는 다양한 형태의 집진 메커니즘(전기력, 관성력, 난류확산)을 한 시스템으로 단일화하여 결합한 전기 다층 다단 다공성 플레이트 집진 시스템의 특성 연구를 수행하였다. 실험은 유입유속, 인가전압, tube 내경 등에 따른 집진효율과 압력손실변화에 대한 해석에 대해서 수행하였다. 실험결과 tube 내경 12 mm에서 다층 다단 다공성 플레이트 5 stage를 설치하였을 때 인가전압 0 kV에서 집진효율이 92.73%였으나 인가전압 30 kV에서 집진효율은 99.39 %로 전기력의 부가에 따라 집진효율이 증가하였다. 본 시스템은 높은 처리유량에 의해 여과 집진장치 및 전기 집진장치에 비해 장치의 소형화가 가능하며 기존의 집진장치 보다 압력손실을 줄이면서 대용량으로 고효율을 유지할 수 있을거라 판단된다.

The Electrostatic precipitatior(ESP) and fabric bag filter which are effective to treat the particulate pollutants emitted in the process of combustion and incineration, have been used widely in and industry field due to their excellent collection performance. ESP has the merit to treat various flow rates without the significant pressure drop. In addition, the fabric bag filter has the high collection efficiency and wide application field, while, recently, the many researches to overcome the problems of low filtration velocity and maintenance of fabric filter have been carried out. among them, the electrostatic fabric bag filter and equipment of cyclone for pretreatment arestudied to recover the above problem of fabric bag filter. However, periodic replacement, maintenance and high maintenance ost still remaion an important problem. And it has low collection efficiency for belows 1㎛ diameter particle. efficiencies of ESP and fabric bag filter for submicron particle are 85 and 80%. Thus, the main purpose of this study is to investigate the collection characteristics of Electrostatic multi-layer multi-stage porous plate system with impaction effect, electric force, experimentally. The experiment is carried out to analyze the characteristics of pressure drop and collection efficiency for the present system with the experimental parameters such as inlet velocity, tube diameter, stage number, plate pitch and applied voltage, etc. In results, the collection efficiency becomes higher 95.25 to 99.39% with increment of stage number of Electrostatic multi-layer porous plate system (1 to 5 stages, applied voltage 30 kV), while the gradient of increment of collection efficiency is to be lower. Additionally, it is estimated that with increment of stage number(1 to 5 stage) at tube diameter 12 mm, inlet velocity = 3.11 m/s, the pressure drop becomes much higher as 19, 42, 70, 101 and 127 mmH2O, respectively.