Chlorine, HCI and HF Removal

Chlorine, HCl and HF Removal

ERG has considerable experience in scrubbing and recovering halogens and hydrogen halides from contaminated gas streams. In most cases, the discharge guarantee is 10 mg/m³ HCl or HF and 5 mg/m³ Cl₂, to comply with site emissions standards. Scrubbing is into water for HCl recovery, or into a suitable alkaline solution for Cl₂, HCl, or HF removal where a salt solution is the scrubber effluent.

Using packed towers or V-tex^® scrubbers, ERG has reference sites for applications as varied as:

Emergency chlorine scrubber in metal refining — bulk Cl₂ scrubbing of over 15,000 kg/hr Cl₂ mass flow using multi-stage V-tex® scrubbers, with a large sump tank acting as both a heat sink and caustic liquor reservoir, and a recirculation pump circuit to control Cl₂ release and manage temperature build-up in the scrubbing circuit.
Hydrochloric acid storage tank vent scrubbers — typically passive scrubbers (i.e., without a ventilation fan) to treat high-concentration HCl fumes from 36% w/w hydrochloric acid storage. These systems typically use packed towers with large sump tanks for reliable scrubbing and batch blowdown of the recovered acid.
Scrubbing of HCl and/or HF formed from the hydrolysis of silicon halides such as SiF₄, SiCl₄, H₂SiF₆, etc., used in industries including optical fibre, speciality gas, fertiliser, and healthcare product manufacturing. These systems are designed to meet the highest emissions standards and reliably handle the SiO₂ generated in the hydrolysis reaction.
General halogenated acid-gas scrubbing from LEV extraction and process reactors in the pharmaceutical, agrochemical, and fine chemicals industries — either packed towers or V-tex® scrubbers in ECTFE or Hastelloy, depending on temperature, often supplied as skid-mounted packages.
Thermal oxidiser flue gas treatment, where high-temperature quenching is followed by HCl and HF scrubbing in a packed tower.

Search our case studies or contact our sales team for further information or a quotation for your application.