Valveless passive gas vent for landfills

摘要

A passive valveless gas vent for a landfill includes a sub-surface gas collection manifold for collecting sub-surface gas from beneath a geomembrane. The collection manifold includes a plenum for receiving sub-surface gas, and the plenum defines an interior volume. A conduit is connected to and extends upwardly from the plenum, with the conduit communicating with the interior volume of the plenum and having an upper discharge end. The conduit is adapted and provided for extending through an aperture in the geomembrane for communicating sub-surface gas from within the interior volume of the plenum through the geomembrane. A hood is positioned adjacent an upper portion of the conduit and defines a discharge chamber therein into which gas from the discharge end of the conduit is discharged. The hood also has a discharge outlet for venting gas from within the discharge chamber to atmosphere.

主权项

1. A passive valveless gas vent for use at an aperture in a geomembrane that covers a landfill, the passive valveless gas vent comprising:
a valveless sub-surface gas collection manifold for collecting sub-surface gas from beneath the geomembrane, the collection manifold comprising a plenum for receiving the sub-surface gas, the plenum defining an interior volume; a valveless conduit connected to and extending upwardly from the plenum, the conduit communicating with the interior volume of the plenum and having an upper discharge end, the conduit being adapted and provided for extending through the aperture in the geomembrane for communicating the sub-surface gas from within the interior volume of the plenum through the geomembrane; and a valveless hood positioned concentrically about an upper portion of the conduit and defining an annular discharge chamber into which the sub-surface gas from the discharge end of the conduit is discharged, the hood also having a discharge outlet for venting the sub-surface gas from within the discharge chamber to atmosphere, and wherein the hood is rigidly affixed to the conduit.