HCL Scrubber

Explanation

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.

Advantages

  • No wet sludge is produced.
  • Relatively small space requirements.
  • Can collect acid gases at high efficiencies.
  • Can handle high-temperature gas streams.
  • Dry exhaust allows addition of fabric filter to control particulate.

Mechanism

Drizgas’s hydrochloric acid scrubber is a custom engineered, low pressure packed bed absorber that provides removal efficiencies up to 99.9%.

Drizgas’s 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.

Drizgas uses a proprietary quencher design that can be constructed with AL6XN for temperatures below 1,000oF, or Hastelloy C276 for higher temperatures.

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.

Drizgas’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.

Applications

  • Steel and Mining industry,
  • Electric power plants,
  • Oil and gas extraction operations,
  • Oil refineries,
  • Pulp and paper mills,
  • Sewage treatment plants,
  • Large poultry farms ,
  • Portland cement kilns,
  • Municipal waste landfills,
  • Coke ovens,
  • Sulfur products and hydrogen sulfide production,
  • Asphalt production and storage etc.