Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1979-07-11
1984-01-31
Spitzer, Robert H.
Gas separation
Means within gas stream for conducting concentrate to collector
55 16, 55 66, 55484, B01D 5322, B01D 5302
Patent
active
044287569
ABSTRACT:
Tubular or rod shaped pieces of a filter material having a holding-back capability with respect to the contaminant are arranged in the interior of a containing cylinder through which the gas flows, so as to provide passages for gas flow along the surface of the filter material pieces, the latter being typically disposed with their long dimension parallel to the direction of gas flow. For a prescribed pressure loss through the filter, a maximum value should be obtained for a quantity that is equal to the filter length in the direction of gas flow times the second Stanton number divided by the hydraulic diameter, the latter term being equal to four times the volume of the space in the cylinder not occupied by the filter material divided by the surface of the filter material in contact with the gas. The second Stanton number is the quotient of the material transfer coefficient and the flow velocity of the gas. Favorable filter escape coefficients are made available with relatively low pressure drop, so that the filter can be interposed in the main cooling gas line of a nuclear reactor for removing contaminants as radioactive caesium.
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Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftun
Spitzer Robert H.
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