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Removal of HCl gas from off gases using self-priming venturi scrubber

Bal, Manisha, Reddy, Thamatam Tejaswini, Meikap, B.C.
Journal of hazardous materials 2019 v.364 pp. 406-418
empirical models, gases, hydrochloric acid, liquids, sodium hydroxide, throat
Growing concern about the effect of hydrochloric acid gas (HCl) on environment and abatement of it is now a very serious issue. This present paper is focused on developing a realistic model in order to remove the HCl from the off gases using self-priming venturi scrubber. A detailed parametric study of throat gas velocity (36–72 m/s), liquid level in outer cylinder (0.40–0.77 m) and inlet concentration of HCl (100–500 ppm) on HCl removal efficiency have been done with normal water as a scrubbing liquid. Also the removal efficiency was enhanced by using NaOH solution as a scrubbing liquid in submerged and non-submerged conditions. Therefore, the maximum removal efficiency of HCl was obtained as 87.83% with normal water and 92.54% with 0.005N NaOH solution as the scrubbing liquid at inlet HCl concentration of 500 ppm, throat gas velocity of 60 m/s and liquid level of 0.77 m in submerged condition. Experimental results were validated with the developed empirical model and showed excellent agreement with less deviation.