Process Exhaust Gas Cleaning
Jet scrubbing plants are perfectly suited to the cleaning of exhaust air from chemical reaction processes, production buildings, container de-aeration, and tank wagon emptying.
As with all wet scrubbing units, GEA’s jet scrubbing plant circulates the scrubbing liquid. However, because it operates according to the ejector principle, there is no pressure loss; rather, it generates a pressure gain in the gas flow so that the need to use a ventilator is often eliminated.
Additional packing or trays are installed into the scrubber’s separator as counter-flow columns for fine cleaning. Depending on the particular application, jet scrubbers can also be designed with several effects or combined with Venturi scrubbers or aerosol separators.
Pure water, diluted acids or caustic solutions are used as the scrubbing medium. This means that the scrubbers are very well suited to the absorption of halogens (F2, Cl2, Br2, I2), hydrogen halides (HF, HCl, HBr, HI), sulfur compounds (SO2, SO3, H2S), ammonia (NH3), and low molecular weight alcohols, carboxylic acids and amines.
If the exhaust gas contains a sufficient concentration of only one noxious substance, it may also be possible to generate products from exhaust gases, such as:
• Production of hydrochloric acid from gaseous HCl
• Production of ammonia solution from ammonia
• Production of sodium hydrogen sulfite from SO2/SO3
• Production of chlorine bleach from chlorine
Depending on the nature of the chemicals being cleaned, the plants can be constructed from metal-based materials (mild steel, stainless steel, alloys or non-ferrous metals), coated steel, thermoplastic or fiberglass-reinforced plastic.