The process of wet dust collection is based on the contact of a dusty gas stream with a liquid that captures suspended particles and removes them from the apparatus in the form of a slurry.

A number of scrubber designs (hollow, packed) are used not only for cleaning gases from dust, but also for absorbing gas impurities, and also for cooling (humidifying and drying) gases.

As a scrubbing liquid in scrubbers, water is most often used; in the joint solution of dust collection and chemical cleaning of gases, the choice of the irrigating liquid (absorbent) is determined by the chemical composition of the trapped impurities. To reduce the amount of waste liquid during the operation of wet devices, partial recirculation and sometimes a closed irrigation system are used.