Process for conditioning waste gas

摘要

The process for conditioning waste gases comprises reacting SO3 with the waste gas and removing the particles in the waste gas in an electrostatic filter (3). The waste gas is fed through a gas discharge path (4) before it enters the filter (3). The gas discharge path has electrodes arranged across the waste gas stream, which are connected to a high voltage source (8). At least one of the electrodes, preferably high voltage electrodes (6), is provided with a dielectric (8), in which are produced OH radicals from the water vapour in the waste gas, which react with the SO2 in the waste gas to form SO3. The novelty is that the electrodes (5,6) are provided with a catalytic coating (9) on the surfaces facing the waste gas channel (2).