Process of cleaning flue gases from heating plants, and a cleaning plant for carrying out the process

Abstract From the Canadian patent

A Process of Cleaning Flue Gases From Heating Plants and a Cleaning Plant for Carrying Out the Process. By a process of cleaning flue gases both solid parti-, cles and nitrogen oxides and sulphur dioxide are removed from the flue gas prior to the discharging into the atmospheric air. In order to ensure that almost all the content of sulphur dioxide and nitrogen oxides is removed from the flue gas, said flue gas is initially carried through a rain of aqueous liquid and subsequently through a heat exchanger, in which its temperature is lowered to about 20-30°C, and then through a film of alkaline liquid, and finally through a second rain of aqueous liquid to pass a sulphuric acid neutralizing …