Patents

The device relates to an odor gas exhaust device for operation in tannery. Hood covers two disjoint ends leaving a gap in between the end of the neck providing a circular aperture, Vent and ducting system along with suction is required for removal of odorous gases in tannery. The device consists of a smooth-surfaced fiber reinforced plastic-coated hood, designed to collect evolved gases from tanning drum/ pits, is fixedly connected and communicated with ventilating duct; one end of a negative pressure suction blower is connected with the ventilating duct; the other end is to be connected with a gas conveying exhaust for functioning. The device has a (i) hood (ii) rounded neck (iii) exhaust fan and (iv) a flange at the exit. The surface is designed maintaining a slowly diverging inclination from right angle to retain shape of a hemisphere. Hemispherical smooth surface of hood makes the gases to pass easily through negative suction pressure. The surface of hood converges to a rounded neck that ends to a flange. The flange can be tightened to hold the hood in fixed position. The present device seems to ensure less friction of the gas emitted and energy saving. The novelty in the design of hemispherical surface to provide reduced friction is exploited for removal of gases from tanning drums.