To solve the problem, Tecnosida® proposes, measures, designs and manufactures a double-stage scrubber. In this case, it is a wet abatement system consisting of two vertical washing towers with a flow rate of 55,000 Nm3/h, complete with dosing technology and management of chemical reagents. This technology allows the air to undergo a double treatment because:
- in the first stage, a basic solution is used in order to neutralize the acidic substances present (in this case hydrogen sulphide and marcaptans);
- in the second stage an oxidizing solution allows to oxidize or eliminate biological molecules and to reduce their potentially pathogenic microbiological load.
The operating temperature downstream of the dryers, i.e. at the entrance to the scrubber treatment system, is over 60°C, which is why Tecnosida® manufactures stainless steel washing towers. In each column of the scrubber there is a double washing layer made up of static beds with filling rings, spray nozzles and high efficiency drop separator; solenoid valves and connection pipes then allow the automatic replenishment of the washing water and the purge of the existing one.