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The plant produces dry HCl gas by the process of distillation of 30% hydrochloric acid solution as a continuous process. The feed 30% HCl acid is preheated by the outgoing hot bottom product in the heat exchanger and fed to the azeotropic distillation column by the pump in a controlled rate. The heat energy is supplied by steam to the thermosiphon reboiler at bottom of the column.
The bottom product from the plant is constant boiling approx 21% acid solution which is cooled by the cold 30% acid feed solution prior to discharge.
The top product HCl gas is dried in the Drying Unit using Sulfuric acid / suitable dehydrating agent. The product HCl gas is anhydrous.
All the wetted parts of the system are fabricated from corrosion resistant materials (Glass and Graphite).