| abstract |
The present invention relates to a method for cleaning of combustion gas containing impurities in a reactor plant, wherein in the first phase of the cleaning process the combustion gas is wetted with a wetting agent in the wetting zone (1b) of the reactor vault (1) and in the second phase of the cleaning of combustion gas to the combustion gas wetted with a wetting agent is supplied at least one additive reacting with impurities, particularly sulphur compounds. In accordance with the invention, in the third phase of the invention, the speed of the upwards directed flow of the combustion gas that is treated with a wetting agent and additive is retarded in the retardation zone (1b) of the reactor vault (1) by enlarging the horizontal cross section area of the reactor vault in the flow direction of the combustion gas. Further, in the fourth phase of the cleaning process of the combustion gases, the medium flowing speed of the combustion gas is standardised to correspond to the end speed of the combustion gas flow in the third phase of the process by forming in the reactor vault (1), after the retardation zone (1b) as an extension to it, a retention zone (1c) having a substantially standardised horizontal cross section. Subsequent to the above-mentioned phases, the combustion gases, wherefrom wetting medium drops have left, are removed from the reactor vault (1) to after treatment, particularly dust removal. |