Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1978-01-18
1979-12-04
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 40, 252417, B01D 1506
Patent
active
041771397
ABSTRACT:
A process for regenerating an adsorbent made of active carbon or aluminum oxide is characterized by resizing an undersized fraction of adsorbent before a regeneration process to maintain a given nominal particle size of adsorbent in an adsorber. In the regeneration process, adsorbent discharged from the adsorber is drained of waste water by feeding the adsorbent onto a screen and obtaining therefrom a first adsorbent fraction consisting of particles with a given nominal particle size and an undersized second adsorbent fraction consisting of particles greater than 10% of the given nominal particle size. The first adsorbent fraction is fed into a fluidized-bed oven for regeneration. The undersized second adsorbent fraction is fed into a processing plant for processing to define the desired given nominal particle size. The processed adsorbent particles and the regenerated adsorbent particles are returned to the adsorber. A further embodiment of the invention provides that the regenerated and processed adsorbent particles are fed onto a pair of superimposed screens for separation so that only particles having a size greater than 50% of the given nominal particle size are returned to the adsorber while the remaining adsorbent particles are subdivided into parts consisting of particles having a size greater than 15%, but less than 50%, of the given nominal particle size which are fed directly to the processing plant and a second part consisting of dust-like particles, less than 15% of the given nominal particle size, admixed with the conveying water. The aqueous mixture of dust-like adsorbent particles is fed to a separator for removing water therefrom which is returned to the adsorber. The dust-like particles are fed to the processing plant for providing the desired particle size.
REFERENCES:
patent: 2254745 (1941-09-01), Jannek
patent: 2343165 (1944-02-01), Adler
patent: 3537657 (1970-11-01), Henne et al.
patent: 3843559 (1974-10-01), Repik et al.
patent: 3998731 (1976-12-01), Franzen et al.
Hahn Ulrich
Stumpe Klaus
C. Otto & Comp. G.m.b.H.
Cintins Ivars
Hart Charles N.
Murray Thomas H.
Poff Clifford A.
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