| 摘要 |
Improved modular vent assemblies for filtering and venting gases from a sewage pumping substation. A basic non-filtering vent assembly comprises a concave plastic hood with an internal enclosure, and a stop-ring mounted in the internal enclosure. A rigid grate is secured atop the main conduit, the grate comprising a rigid circular plate with evenly-spaced apertures that forms a filter screen. A plurality of holes about the perimeter of the cap allow it to be secured to the grate by insertion of detent-pins. An enhanced filtering vent assembly comprises a stainless drum with a hinged stainless cover seated atop. The drum is equipped with a central conduit positioned coaxially with the drum by a plurality of louvers. The conduit extends downward past the louvers through a rigid grate (as above) which in this case supports a fill of activated carbon material within the drum. Powered variation of both of the foregoing embodiments are also disclosed in which a blower motor is connected to the modular vent assemblies for inducting sewer gas there through. All the foregoing embodiments provide easy maintenance and replacement of the filter cartridge, do not accumulate water vapor, are not susceptible to blockage or freezing, and may be easily retrofit to most any existing pump station exhaust vent.
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