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AssigneeThe United States of America as represented by the United States Department of Energy
InventorsDavid F. Ciliberti, Thomas E. Lippert
Estimating the term…
A filtering unit for filtering particulates from high temperature gases uses a spiral ceramic spring to bias a ceramic, tubular filter element into sealing contact with a flange about an aperture of a metallic tube sheet. The ceramic spiral spring may contact the upper edge of the filter element and be restrained by a stop member spaced from one end of the tube sheet, or the spring may contact the bottom of the filter element and be restrained by a support member spaced from the opposite end of the tube sheet. The stop member and support member are adjustably secured to the tube sheet. A filtering system uses the ceramic spiral spring to bias a plurality of ceramic, tubular filter elements in a respective plurality of apertures in a tube sheet which divides a vessel into upper and lower enclosed sections.
A filtering unit for the filtering of particulates from a particulate-containing high temperature gas stream comprising a ceramic, tubular filter element, having a closed bottom and side walls and an open top at the upper region thereof, disposed in an aperture in a tube sheet, the walls of said tube sheet about the aperture having an inwardly extending flange thereon, with the open top of said ceramic, tubular filter element adjacent one surface of the tube sheet where filtered gases are discharged, and the closed bottom and side walls exposed to the area of the opposite surface of the tube sheet where a particulate-containing high temperature gas stream to be filtered is present, wherein a ceramic spiral spring is provided at an end of said ceramic, tubular filter element to bias the upper region of the ceramic, tubular filter element into contact with said flange so as to seal the ceramic, tubular filter element to said flange on said tube sheet.
In a filter system having a vessel with side walls, closed top and closed bottom walls wherein a tube sheet divides said vessel into upper end lower sections, the upper section facing one surface of the tube sheet where filtered gases are collected and a lower section where a particulate-containing high temperature gas stream to be filtered is present, and wherein a plurality of ceramic, tubular filter elements, having open tops at the upper regions thereof, extend vertically downwardly through apertures in the tube sheet with open tops thereof facing said upper section and the closed bottom and side walls thereof exposed in said lower section, having an inlet line for said gas stream to said lower section and an outlet line for filtered gas from said upper section, with a flange provided about said apertures is said tube sheet, the improvement wherein a ceramic spiral spring is provided at an end of at least one of said plurality of ceramic, tubular filter elements to bias the upper region of the ceramic, tubular filter element into contact with said flange so as to seal the ceramic, tubular filter element to said flange on said tube sheet.
Dependencies are inferred from the claim text.