Venturi quench
Waste gases from incineration plants have to be quickly cooled, e.g. in order to suppress building of dioxin at incineration of special sewages. The new quench apparatus is able to reach this as it uses the Venturi principle proved at separation of dust. The hot gas is entering the tubular apparatus from top and is cooled by the injected water. In the Venturi throats following, built by crosswise installed cylinders and by the adjustable displacer cylinder, the liquid is dispersed into finest drops because of the high shear effect of the gas flow. The flow baffles take care for an intensive renewing of limit areas between gas and liquid and found compact design and favourable price. In addition of cooling the gas is thoroughly cleaned from dust – even at process conditions of fluctuations of gas throughput thanks to the adjustable displacer. The cooled and cleaned gas leaves the apparatus through the outlet.
The advantages for the Venturi quench are:
- safe and efficient cooling of gases with high part of dust
- quick cooling by the Venturi quench prevents the so-called De-Novo-Synthesis
- the cross section of the Venturi throats can be modified during operation
- the spray nozzles are lying outside of the gas flow, a jacket cooling and a wall rinsing guarantee a high operating safety
- using different corrosion resistant materials, as Hastelloy, stainless steel, etc. guarantee a high lifetime
- compact space-saving design
Venturi quench
Spray picture of external nozzles