Abstract: A refinement of an evaporation vessel and electrode arrangement allows a large range of different apparatus types to be provided, of variable construction, using a small number of different components. For this purpose, an arrangement of a plurality of bushings (16.1, 16.2) is provided in the wall of the evaporation vessel (2, 6, 10), in which bushings (16.1, 16.2) electrodes (20) can be held by a plug-in part (18). The plug-in part (18) is provided with an automatic latching device (38, 40) which holds it firmly after simple insertion into one of the bushings (16.1, 16.2) and which can be released again by hand, if required, in order to remove the plug-in part. Electrodes can thus be installed at various positions and in different orientations in a simple manner, depending on the desired design of the electrode evaporator. It is furthermore proposed to include in the electrode arrangement a dummy electrode which is electrically not connected or is connected to a neutral conductor.

Abstract: A crossflow wall for a gas stream has baffle elements which form inlet ducts, which narrow in the inflow direction, and end in a steadying bead. Coaxially to the baffle elements, concave impingement surfaces are arranged which are staggered relative to the baffle elements and are curved at a distance around the steadying bead thereof, so that they deflect the gas stream to the rear of the baffle elements. The baffle elements and impingement surfaces are of at least approximately rotationally symmetrical shape and are arranged with pairs of them having parallel axes. Between the impingement surfaces, outlet ducts are left free, through which the gas stream leaves at least approximately parallel to the inflow direction. The heavy foreign matter particles accumulating in the vicinity of the impingement surface are collected in the peripheral edge of the impingement surface by a collecting channel, are passed into a collecting chamber and extracted.

Abstract: Located at the bottom edge of the outflow orifice (6) of a steam distributor is a nozzle (10) which extends in the manner of a slit over practically the entire length of the outflow orifice (6). The edges (14, 15) limiting the nozzle orifice (13) laterally are acute-angled and sharp; the inner walls (18, 19) adjoining these edges are designed so that water droplets which possibly form are conveyed away downwards.Because of the sharp edge design, water droplets cannot form in the outflow region (13) of the nozzle. The outflowing steam which subsequently mixes with an air stream (5) is therefore free of water drops. The formation of water droplets on the inner walls (18, 19) adjoining the said edges is harmless, since these droplets are conveyed away downwards as a result of the inclination of the said walls.