A method and apparatus for the purpose of further distance-to-go of harmful substances from waste gases from combustion plants

摘要

For a more effective elimination of gaseous, aerosol-like and/or dusty contaminants and pollutants from the waste gases of refuse incinerators, a process is proposed in which the temperature of the water-containing residual scrubbing gas which, if appropriate, has already been treated according to the wet process, dry process or semi-dry process, is reduced to such an extent that at least the main part of the water vapour still contained in the gas condenses out in the heat exchanger (13), pollutant contents also being precipitated with the water vapour or themselves being caused to condense, to be absorbed, to be adsorbed or to be bound in another way. The precipitated condensate is aftertreated chemically-physically in a suitable manner. The process is also distinguished by a favourable energy balance, since less water evaporates and has to be discharged via the stacks. In addition, apparatus particularly suitable for carrying out the process is proposed (see Figures 2-4, 6 and 8). Figure 6 shows a design of the apparatus, by means of which the process can be monitored and controlled via pollutant concentration measurements. IMAGE