| 摘要 |
<p>A vapor recovery apparatus (10) is provided with an automatic flow control system. The apparatus includes first and second reaction vessels (34, 42). Each reaction vessel holds a bed of adsorbent (36, 40) for adsorbing volatile liquid vapor and producing relatively volatile liquid vapor-free air. A vacuum pump (46) is provided for regenerating the beds of adsorbent. A cooler and/or absorber tower (60) is provided to recover volatile liquid vapor generated during bed regeneration. Conduits are provided for the passage of air-volatile liquid vapor mixture between the various components of the apparatus. A series of valves direct the flow of the air-volatile liquid vapor mixture through the conduits. The automatic flow control system includes a vacuum transmitter for monitoring air pressure within the apparatus at a selected point and a controller responsive to the sensed pressure for controlling the operation of the valves.</p> |
