Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1974-09-19
1976-12-28
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 37R, 210 39, 210 80, 210 82, 210189, 210275, B01D 1502, B01D 1504, B01D 1506, B01D 3902
Patent
active
040000664
ABSTRACT:
There is provided a pulseback technique for cleaning and renewing a panel bed contactor suitable for chemical or physical treatment of liquid and granular material. Free surfaces for entry of liquid are supported cooperatively by louvers. A pulseback technique rids the liquid entry surfaces of granular material spent by the treatment, including accumulated fine dirt particles if the treatment includes filtration to remove the dirt. The pulseback consists of a reverse transient flow across the panel bed of a intensity moderated so that the reverse pressure differential exceeds a critical minimum difference for not more than about 2000 milliseconds and attains a top value within about 600 milliseconds after the pressure differential surpasses the critical minimum difference.
REFERENCES:
patent: 557177 (1896-03-01), Wilder
patent: 921115 (1909-05-01), Jewell
patent: 3296775 (1967-01-01), Squires
patent: 3368328 (1968-02-01), Reinauer
patent: 3410055 (1968-11-01), Zenz
patent: 3410056 (1968-11-01), Reinauer
patent: 3770388 (1973-11-01), Zenz
patent: 3854902 (1974-12-01), Kalen
Hart Charles N.
Spitzer Robert H.
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