Abstract: This invention relates to a spraying system for spraying a liquid, such as water, to be used in a plant for treating flue gases, provided with at least a liquid supply pipe, a spray body, and a spray head, which is characterised in that the spray body (5) and the supply pipe (4) are surrounded by a housing (1,2) thermally insulating the spray body (5) and the supply pipe (4) from the surroundings, the spray body (5) is fastened to the housing (1) of the supply pipe (4), which fastening is such that there is little heat transport from the spray body (5) to the housing (1), and the housing (2) is located near the spray body (5) at some distance therefrom.

Abstract: A process for conditioning a gas charged with solid particles and/or vapors, which comprises passing the gas stream through a conditioning tower, spray-injecting therein water into the gas to form fine droplets which are allowed to completely evaporate out of contact with the wall, and discharging the cooled and wetted gas from the conditioning tower. According to the invention, the water is sprayed with known per se nozzles which at a reduced water supply give a droplet size less than, or equal to, that at a larger water supply, and the supply of which is variable over a wide range, and the water supply is controlled so that, upon modification of the inlet temperature T.sub.1 and/or the amount of gas, on the one hand, the water supplied is completely evaporated within the conditioning tower and, on the other hand, the outlet temperature T.sub.2 of the gas always remains above the known dew point line of the gas.