The air contaminated with chlorine (raw gas) is transported by the suction ventilator in the neutralisation tower, from where it flows upwards in the direction of the spray nozzles. In the area of the packing material, there is intensive contact between the raw gas flowing upwards and the neutralisation agent. The chemical neutralisation reaction is:
2 NaOH + Cl2 = NaOCl + NaCl + H2 0
Caustic soda + Chlorine = Sodium hypochlorite + Sodium chloride + Water Before leaving the chlorine scrubber, the cleaned air (pure gas) passes through a demister in which the droplets of fluid are removed.