Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1976-06-14
1977-08-09
Spear, Jr., Frank A.
Gas separation
Means within gas stream for conducting concentrate to collector
55158, B01D 5322
Patent
active
040408019
ABSTRACT:
This invention relates to an improved method and system for making relatively large and rapid adjustments in the process gas inventory of an electrically powered gaseous diffusion cascade in order to accommodate scheduled changes in the electrical power available for cascade operation. In the preferred form of the invention, the cascade is readied for a decrease in electrical input by simultaneously withdrawing substreams of the cascade B stream into respective process-gas-freezing and storage zones while decreasing the datum-pressure inputs to the positioning systems for the cascade control valves in proportion to the weight of process gas so removed. Consequently, the control valve positions are substantially unchanged by the reduction in invention, and there is minimal disturbance of the cascade isotopic gradient. The cascade is readied for restoration of the power cut by simultaneously evaporating the solids in the freezing zones to regenerate the process gas substreams and introducing them to the cascade A stream while increasing the aforementioned datum pressure inputs in proportion to the weight of process gas so returned. In the preferred form of the system for accomplishing these operations, heat exchangers are provided for freezing, storing, and evaporating the various substreams. Preferably, the heat exchangers are connected to use existing cascade auxilliary systems as a heat sink. A common control is employed to adjust and coordinate the necessary process gas transfers and datum pressure adjustments.
REFERENCES:
patent: 2085526 (1937-06-01), Diescher
patent: 3208197 (1965-09-01), Simon et al.
patent: 3435840 (1969-04-01), Clarke
patent: 3792570 (1974-02-01), Biondi et al.
patent: 3856486 (1974-12-01), Chang
patent: 3961917 (1976-06-01), Benedict et al.
Dyer Robert H.
Fowler Andrew H.
Vanstrum Paul R.
Carlson Dean E.
Hamel Stephen D.
Lewis Fred O.
Spear, Jr. Frank A.
Spitzer Robert H.
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