Venturi Scrubbers

Venturi wet scrubbers are a diverse group of separators used in widely varying sizes in many branches of industry. Since venturi scrubbers can handle larger air volumes up to 40,000 m³/h (23,500 cfm), they are used in many industrial applications, even in high-temperature applications, and manage high dust loads with fine particles like explosive dust, steel dust, aluminium, magnesium and titanium dust, sticky powder or greasy vapors.

Venturi scrubbers are the most widely used type of high-efficiency wet scrubber and are available in numerous different forms (e. g. cylindrical throat, ring-gap scrubber). The characteristic feature of this type of wet scrubber is the convergent-divergent cross-sectional profile of the “Venturi”. The highest gas velocity is reached in the narrowest cross-section, the throat. Scrubbing liquid is injected just before or in the throat to the gas stream – alternative liquid-to-gas routings are also possible – and is divided into droplets by the gas.

As a result of the extremely high relative velocity between the gas and the liquid in the throat, particle removal by impingement on the liquid droplets is extremely efficient. Venturi scrubbers, therefore, lend themselves especially well to the removal of extremely fine dust such as condensation and sublimation dust. The advantages are their simple and cost-effective design and minimum space requirements on the shop floor.