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A method and apparatus for abatement of gasoline vapor emissions from a vent pipe at a gasoline service station in which a vapor piping system interconnects the vent pipe with gasoline storage tanks and gasoline dispensing nozzles in the service station, the apparatus including a pilot burner with a

A method and apparatus for abatement of gasoline vapor emissions from a vent pipe at a gasoline service station in which a vapor piping system interconnects the vent pipe with gasoline storage tanks and gasoline dispensing nozzles in the service station, the apparatus including a pilot burner with a pilot ignitor, a main burner with a main burner ignitor, first and second vapor pressure switches in the vent pipe 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 located downstream from the first and second pressure switches for moving vapor in the vapor piping system; a sensor for the pressure of vapor downstream from said turbine for causing at a selected downstream pressure of vapor admission of vapor to the pilot burner, and a sensor for the pilot flame at the pilot burner for causing admission of vapor to the main burner for ignition by the pilot flame.

대표청구항 ▼

In an apparatus for abatement of gasoline vapor emissions from a vent pipe at a gasoline service station or the like in which a vapor piping system interconnects the vent pipe with gasoline storage tanks and gasoline dispensing nozzles in the service station, said apparatus including a pilot burner

In an apparatus for abatement of gasoline vapor emissions from a vent pipe at a gasoline service station or the like in which a vapor piping system interconnects the vent pipe with gasoline storage tanks and gasoline dispensing nozzles in the service station, said apparatus including a pilot burner with pilot ignition means therefore, a main burner with main burner ignition means therefore, at least first and second vapor pressure switches in said vent pipe for sensing and controlling vapor pressure in said vapor piping system; the combination of: turbine means located downstream from, and controllably activated by said first and second vapor pressure switches for moving vapor in the vapor piping system so as to maintain a partial vacuum in said vapor piping system; means for sensing the vapor pressure downstream from said turbine means; means responsive to said downstream vapor pressure sensing means for causing, at a selected vapor pressure downstream of said turbine means, admission of vapor to said pilot burner; means for igniting said vapor at said pilot burner to provide a pilot flame; means for sensing said pilot flame and upon sensing said pilot flame for causing admission of vapor to the main burner for ignition by said pilot flame.