Furnace effluent filter for a carbon baking furnace

Abstract

A carbon baking furnace is provided with a furnace effluent filter using as the filter medium a carbonaceous material of the type employed in making green carbon bodies to be baked in the furnace, and the used filter material is recovered in a form suitable for making such bodies. The filter unit includes a filter medium supply tube extending vertically downwardly into an enclosed funnel-shaped housing. An effluent inlet tube is coaxially arrayed within the filter medium supply tube. Fresh filter material is added to renew a bed thereof in the funnel-shaped housing, through the filter medium supply tube, and used filter material is withdrawn therefrom via a valve located at the base of the housing. Effluent from the furnace enters the filter via the effluent inlet tube, rises upwardly through the bed of filter material, disposed generally in the region where the filter material leaves the filter medium supply tube, and exits via an outlet tube located atop the funnel-shaped housing. Subsequent to performing its filtering function, the used filter material is recovered for use, preferably for products of the type processed in the furnace, or recycled through the filter and reused therein.

Dependencies are inferred from the claim text.