Dry gas scrubbing and filtration to eliminate gaseous (HCl, HF, SOx, dioxins and furans, etc.) and solid pollutants.
Certain applications of gas filtration, mostly related to thermal process systems (waste incineration, melting furnaces, etc.) contain also gaseous pollutants such as HCl, HF, SOx, dioxins, furans, etc.) which can be very dangerous for the environment.

These hazardous gaseous pollutants have to be eliminated, together with the dust particles.
To solve these problems, Ventilex uses a "Dry Gas Scrubbing and Filtration" process, based on the dry absorption of the gaseous components by a special selected absorbing agent (dry scrubbing product) which is injected in the gas stream in a special designed reactor, followed by a Jet-bag fabric filter.

Typical dry scrubbing absorbing products are: active coal, lime, sodium carbonate (Bicar), zeolithe or a combination of different of these products.

Hot gas cooling and filtration

When hot gas filtration is needed, the most economic and performing solution consists in first cooling down of the hot gas until a temperature which is compatible with standard filter fabrics and then filter the gas in a Jet-bag fabric filter. This method offers different advantages compared to straight "hot" gas filtration, such as: smaller air volume after cooling (smaller system), standard economic filter fabrics can be used, smaller energy consumption and eventual energy recovery on gas cooler.

The gas cooler has to be designed considering possible operating problems, such as dust settlement in the heat exchanger (automatic cleaning can be installed), abrasion by the dust, corrosion risk by condensation of acid gas components.

Hot process gas filtration (up to temperatures of 800°C)

For some industrial processes it is necessary to filtrate the hot process gas, without cooling, for example to allow recycling of the gas in the process or energy saving reasons.
For these special applications Ventilex uses a special Jet-bag filter design with heat resistant filter elements, made in stainless steel micro fibres (max. design temperature 800°C).