Hydrochloric Acid Scrubber Available Achieves High Removal Efficiency

Envitech's hydrochloric acid scrubber is a custom engineered, low pressure packed bed absorber that provides removal efficiencies up to 99.9%. The Envitech hydrochloric acid scrubber first cools a hot gas stream to saturation using either a horizontal or vertical quencher depending on the size of the inlet gas flow. Envitech uses a proprietary quencher design that can be constructed with AL6XN for temperatures below 1,000oF, or Hastelloy C276 for higher temperatures.

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The hydrochloric acid scrubber uses random dumped packing, a mist eliminator, and a liquid distribution system to remove HCl through absorption and neutralization. Gas flows up through the packed bed. Liquid flows countercurrent to the gas, absorbing the HCl. In the liquid, the HCl can be neutralized by a caustic reagent such as sodium hydroxide, producing benign sodium chloride. Packing media improves the efficiency of absorption by exposing more liquid to the gas in a given volume.

Envitech's packed bed scrubber is ideally suited for HCl produced by hot combustion exhaust streams including thermal oxidizers, roasters, kilns, industrial boilers, or incinerators.

The HCl scrubber can be supplied as a vertical tower, or as a rectangular, pre-assembled system.