Patent ID: 6824596
Filing Date: 2004-11-30
Classification: B01D

Abstract:
A multi-operation mode gas scrubbing device for removing odorous gases released during the regular operation of an odorant delivery system as well as during the maintenance, re-fill and failure of the system, the device comprises a tank housing a filtration medium for absorbing odorous gases, normally-open main inlet and main outlet adapted to be connected in fluid flow communication with the odorant delivery system for removing odorous gases from a gas stream during normal operation conditions, a normally-closed maintenance/emergency inlet openable under maintenance and emergency conditions for allowing odorous gas released from the odorant delivery system into the surrounding environment to be drawn through the filtration medium, and an air mover connected to a normally-closed maintenance/emergency outlet of the tank for drawing, through said filtration medium via said normally-closed maintenance/emergency inlet, the odorous gases released from the system, thereby preventing release of odors into environment during maintenance and failure of the system.