Return circuit for vapor recovery system

摘要

An absorber fluid return circuit is provided for a volatile liquid vapor recovery system. The vapor recovery system includes at least one adsorbent bed for capturing volatile liquid vapor, a vacuum pump for regenerating the adsorbent bed, an absorber tower for condensing volatile liquid vapor and an absorber fluid source. The absorber fluid return circuit includes an absorber fluid return pump having an inlet and outlet and a first conduit for directing absorber fluid from the absorber tower to the inlet of the return pump. A second conduit directs absorber fluid from the outlet of the return pump to the absorber fluid source. A variable speed motor drives the return pump. The variable speed motor is controlled by a controller operatively connected to a sensor for sensing the level of absorber fluid in the absorber tower, a variable speed AC drive for varying the speed of the drive motor.