In production plants in the chemical and pharmaceutical industry, exhaust gases have to be extracted from agitator tanks and other apparatuses in order to be scrubbed subsequently. Since the exhaust gases might contain different acid and alkaline vapours, such as halogen and ammonia compounds, solvents and amine, it also must be possible to operate the gas scrubber with different scrubbing fluids.
Several solvents, such as toluene, methylene chloride, benzene etc. and the presence of chlorine in the exhaust gas require a special material selection. Based on the standard compact gas scrubber series, GEA Jet Pumps designed a 2-stage gas scrubber made of stainless steel/ECTFE, steel/PTFE and titanium. These materials guarantee a max. resistance. Due to the different fluids and the high load fluctuations the scrubber is equipped with an expensive measuring and control system. On request, it also can be delivered as mobile unit.
The gas scrubber operates according to the injector principle, i.e. a suction nozzle sucks in the exhaust gas from the scrubbing fluid by the suction nozzle, thus, the exhaust gas is entrained. A mechanical fan is not required for the extraction and conveying of the gases. The gas is cleaned by means of a chemical reaction with the scrubbing fluid. In the 2nd scrubbing stage, the counter-flow column, a fine absorption is responsible that the limit values are not exceeded.