Wet mechanical scrubbers

In wet mechanical scrubbers, particularly inertia is used in the separation process and, to a lesser extent diffusion processes and the condensation effect. The separating areas are formed by a water curtain, water drops, a liquid surface or the surface of bubbles. During the separation involving water drops, their mass and diameter has to be much larger than those of the particles to be separated. The efficiency of the separator is governed by relation between the velocity of the droplets of the washing medium and that of the particles in the gas to be purified, and the time of contact between the liquid and gaseous phases. 

In comparison with dry mechanical separators, the wet separators exhibit a higher separation efficiency. High values can also be achieved for fine dusts. The separation efficiency of wet separators depends on the wett- 

The wet mechanical scrubbers include simple shower, vortex, foam, inertial, stream and rotational separators. 

In spray chambers, the drops are injected into the gas stream at a high velocity. The gas streams through the equipment at a velocity up to 3 m s. The specific water consumption is lower than that in towers, ranging between 0.2 and 1 1 m.  

Wet spinner scrubbers. Wet spinner scrubbers operate on the basis of the same principle as dry vortex separators, however, they are equipped with jets to spray water. The jets form a continuous film of water on the walls of the cyclone, thus making possible a removal of captured solid particles to the outlet neck of the scrubber. The gas temperature must not exceed 150° C. Types with an tangential inlet of the gas as weU as those with an axial inlet (with the use of a spinner) are used. The specific water consumption is between 0.1 and 0.41 m, in the case of wet scrubber with the spinner, the separation limit is below 1.5 /xm. The maximal input dust 

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