Abstract
A novel electrostatic precipitator CAROLAreg is developed for collection of fine oil mists. It operates on the principle of unipolar particle charging in the corona discharge and particle precipitation under the field of space charge. The pilot precipitator was tested at different gas temperatures. It is shown that the increase of gas temperature changes the characteristics of the corona discharge and particle size distribution, especially for droplets sub-micron droplets. The CAROLAreg precipitator was used for collection of oil mist from pyrolysis gases at the HALOCLEANreg plant. The flow rate of biomass in the HALOCLEANreg plant was 15-30 kg/h. The particle mass concentration in the raw gas was over 100 g/Nm3. The operation voltage of the precipitator was 10-12 kV and corona current up to 0,1 mA. Single stage electrostatic precipitator ensured mass collection efficiency 97-99,5% for pyrolysis oil mist.
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