습식 회전형 다공성 디스크 시스템의 집진특성

Abstract

Abstract Emission regulations of air pollutants generated by industrial activity worldwide has been enhanced. Thus air pollution prevention facilities of high efficiency is becoming more important to industrial activities. Wet scrubber, one of the conventional air pollution prevention facility, has lots of advantages such as treatment of explosive gas, removal of both gases and particles, hot gas cooling effect. However, the wet scrubber has the matter such as liquid entrainment, nozzle fouling and high power cost because of lots of pressure drop. This problem such as liquid entrainment in the apparatus can be prevented by installing the demister in the conventional wet scrubber. But, it must be periodically replaced clogged by particle-phase pollutant. Therefor, it is necessary to develop the wet scrubber which have not required installation and replacement of the demister and spray nozzle. The wet-type rotating porous disk system is designed to make water film through the axial rotation of the disk without water spray nozzle. In addition, it is not necessary to install demister because liquid entrainment is minimized. The main object of this study is to investigate the collection characteristics of wet-type rotating porous disk system experimentally. The experiment is carried out to analyze the pressure drop and collection efficiency for the present system with the experimental parameters such as system inlet velocity, stage number, tube diameter, inlet concentration, etc. In results, for the present system, at 5 stage and =1.8 m/s, the pressure drop becomes significantly lower as 64 mmH2O in comparison with that of the conventional wet type scrubber(Venturi scrubber, over 250 mmH2O). The collection efficiencies increase with higher inlet velocity showing 92, 95.7, 98.4%, while SO2 removal efficiencies decrease with increment of inlet velocity as 80, 65, 50% at =1.08, 1.44, 1.8 m/s and tube diameter =10 mm, respectively.