Application of corona discharge and ultrasonic aerosolation to plasmochemical reactions for air depollution

The small scale equipment (15 Nm3/hour) on by-pass of exhaust pipes from various static exhaust sources was tested. The tested equipment consists of two corona discharge blocks (each contains 12 coaxial corona discharge tubes) with geometry which enables the gas flow rate about 2-5 m/s. The gas flow is directed first downwards and then upwards (in U shape). The ultrasonic aerosolator was used for spray of add water or water solution for neutralisation on the inlet of discharge system. The size of sprayed droplets was 0.5-10 μm and applied total amount of liquid between 0,5-2 l/hour. The advanced method of HV electrode cleaning electrode from solid products originated during discharge action was developed and tested. Since following compounds have been investigated up to now (gas oxides such as NOx, CO, CO2, SO2, poly-aromatic hydrocarbons, volatile organic compounds, SiF4, NH3, heavy metal oxides (Pb, As), soot, smoke, particles). (authors)