Gas purification techniques

Condensation
The gas flow is cooled down with a cold medium (cold wall of a heat exchanger or fluid). Due to the reduction of the temperature the vapourpressure of the polluenten in the gas flow reduces. If the vapourpressure drop under the partial pressure of those polluent the substance will condense into a mist or droplets. This mist must be broken away from afterwards with a mist or demister. At condensing water water soluble the polluenten (acids, alcohols, ammonia) solve partially in the condensate. Because of this already strong fragrance reductions can be realized. At fragrance a condenser in most of the cases will be followed by another treatment technology. The condenser can be carried out as an direct or indirect condenser. The cooling water with which the gas flow are cooled down must be cooled down for its part to surroundings air. This can happen in open or closed cooling towers.
The advantage for the use of a condenser is: Well to separate large dirt freight The disadvantages for the use of a condenser are: Cooling water is necessary so that an air cooler or cooling tower must be placed Variable output at variable gas composition and fluid level Condensation is mainly applied at wet fragrance charged degassing or at very high solvent concentrations(> 50 g/Nm³). At solvents one will generally concern to cryocondensation. Applications are find in: Degassing in feeding sector Degassing of indirect installations: these degassing do not exist from with a small quality condensable gases so that large of acts the gas volume to treat Condensation as a preprocessing is also generally used to catch the largest part from the pollutants. Another technique becomes then come up in series to the standards or the fragrance embarrassment to raise. These in series technique are then less charged so that the costs are generally lower. Click here for overview over scrubber techniques For more books and reading information see our website: Air treatment books overview

Gas purification techniques

Condensation