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Englisch > Products > Special Components > Exhaust Air Cleaning

Exhaust Air Cleaning

Abluftreinigung

Exhaust Air Cleaning

Although we want to prevent this from becoming the standard, we have addressed this subject. Here to, everything starts with the planning. The exhaust cleaning must be optimally adapted to the ventilation
system. Pressure lass must be kept to a minimum. Energy consumption determines how economic the system is.

In this process, the exhaust air is passed through an area (see drawing), in which there is special packing made of plastic parts, over which the washing water is distributed evenly by a special circulation pump (low energy and a lot of water). Below the packing, the wash water is collected in a basin (concrete / stainless steel depending on the construction). Lost water is replaced automatically.

>> to large screen view (PDF)

>> to large screen view (PDF)

The ventilators are switched in groups, a prewash with fresh water is arranged behind each. Through constant circulation of the water, bacteria form in the wash water and on the packing, which is designed to greatly reduce odours.

Essential conditions for planning such a system are the corresponding cross sections in the exhaust duct area and the calculation of pressure drop in the packing. At regular intervals (depending on the amount of water - longer or shorter) part of the packing should be cleaned in order prevent an increase in pressure loss. The packing may not be completely cleaned, part of the bacteria strain must be retained.

Abluftreinigung This system adds some features to that of a bio-washer: - The base material exhibits good adhesion to microorganisms. - The trickle
density of the bulk material is less than 20m ³ / m², to prevent washing out of the microorganisms.

In individual cases, even a spray wash can be used. Then, with a smaller amount of water and packing, only the dust (and therefore significant amounts of bound odours) is washed out. It all depends on the requirements of the Building Authority. With a spray wash wind-dependent regulation of the system is feasible (e.g. switching when the wind direction is toward a housing area or undeveloped land).

To wash out a significant amount of ammonia, sulfuric acid must be used during the pre-wash. These steps should be avoided if possible because of the extra work and risk of much greater technical complexity.