| 摘要 |
<p>A method and apparatus for abatement of gasoline vapor emissions from a vent pipe (34) at a gasoline service station in which a vapor piping system interconnects the vent pipe (34) with gasoline storage tanks (20) and gasoline dispensing nozzles (14) in the service station, the apparatus including a pilot burner (62) with a pilot ignitor (78), a main burner (58), first and second vapor pressure switches (68, 70) in the vent pipe (38) for sensing and controlling pressure of vapor in the vapor piping system to maintain the pressure of vapor slightly below atmospheric pressure, a regenerative small turbine (54) located downstream from the first and second pressure switches for moving vapor in the vapor piping system; a sensor (72) for the pressure of vapor downstream from said turbine (54) for causing at a selected downstream pressure of vapor, admission of vapor to the pilot burner (62), and a sensor (78) for the pilot flame at the pilot burner (62) for causing admission of vapor to the main burner (58) for ignition by the pilot flame.</p> |
