Reusable disc filter with spacing bosses for high temperature ga

Details Reusable disc filter with spacing bosses for high temperature ga Reusable disc filter with spacing bosses for high temperature ga

1979-03-14

1981-06-30

Prunner, Kathleen J.

Gas separation

With nonliquid cleaning means for separating media

Solid agent cleaning member movingly contacts apparatus

55492, 55522, 89 1B, 102531, 102530, B01D 4640

Patent

active

042760658

ABSTRACT:
A reusable filter to remove contaminants from high temperature gases, in excess of 4500.degree. F., developed by burning propellants and used to do work such as actuation of pistonpowered devices in aircraft store ejector racks. Contaminants are removed to prevent fouling of the device being acted upon, to increase reliability and to decrease maintenance of the device. The filter has stacked metal discs spaced from one another to permit side entry of the gas between the disc edges, and the discs are made of molybdenum, columbium or tantalum. A plurality of studs pass through the discs to align and hold the filter together, with raised bosses at the stud holes in each disc establishing the filter gaps between the discs. Each disc has a plurality of flow openings communicating with the filter gaps and aligned with the openings of the other discs to allow axial gas flow along the filter for end exit. The discs are sufficient in size and number to provide adequate filtering capability and absorb heat to prevent melting, but are not so large as to remove excess heat from the gas upstream from where the gas does its work. Filtering gaps in an axial direction between adjacent discs may be of the order of a few microns to a few hundred microns.

REFERENCES:
patent: 1793583 (1931-02-01), Bowden
patent: 2330945 (1943-10-01), Becker
patent: 3382982 (1968-05-01), Stevens
Jones, J. I. Part 2--High Temperature Resistant Fibres from Organic, Polymeric Precursors, In Filtration & Separation, 7(3): p. 303, May/June 1970.

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