Process for treating volatile organic compounds or gases, especially in an air circulation duct

• Main Authors: BERTRAND, CYRILLE, CHEVRIER, JEAN-PAUL, PHILIBERT, EMMANUEL
• Format: Patent
• Language: English; Polish
• Published: 29.04.2011
• Subjects: BLASTING; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; HEATING; HUMAN NECESSITIES; HYGIENE; LIGHTING; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; OTHER DOMESTIC STOVES OR RANGES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; RANGES; SEPARATION; TRANSPORTING; VENTILATING; WEAPONS

Treating an air stream to remove volatile organic compounds (VOC) or gases comprises drawing the air stream through an active carbon filter at a first suction rate (R1) to trap the VOC or gases, desorbing the VOC or gases by heating the filter drawing air through the filter at a second suction rate (R2) less than R1, and destroying the VOC or gases in contact with a light-activated photocatalyst. Independent claims are also included for: (1) device for treating an air stream containing volatile organic compounds (VOC) or gases, comprising an at least two-speed extractor fan (23) and an active carbon filter (21) associated with a photocatalyst that can be activated with a light source (24); (2) air circulation conduit comprising a device as above in which the filter is located upstream of the photocatalyst; (3) extractor hood comprising means for carrying out the above treatment; (4) extractor hood comprising a device as above; (5) extractor hood comprising an air circulation conduit as above.