| US 7,575,673 B2 | ||
| Method of water treatment | ||
| Michael J. Unhoch, Wilmington, Del. (US) | ||
| Assigned to Arch Chemicals, Inc., Norwalk, Conn. (US) | ||
| Filed on Jun. 02, 2006, as Appl. No. 11/445,513. | ||
| Application 11/445513 is a division of application No. 10/691479, filed on Oct. 22, 2003, granted, now 7,094,353, filed on Aug. 22, 2006. | ||
| Claims priority of provisional application 60/423790, filed on Nov. 04, 2002. | ||
| Prior Publication US 2006/0283811 A1, Dec. 21, 2006 | ||
| Int. Cl. C02F 1/50 (2006.01); C02F 1/76 (2006.01) | ||
| U.S. Cl. 210—143 [210/167.12; 210/198.1] | 12 Claims |
| 1. A system for treating a volume of water to maintain a predetermined amount of a water treatment chemical in the volume
of water over a time period comprising,
a pump having a pump tube displacement cooperatively connected to a computer for control of the pump,
a source of chemical for supply to the pump for delivery by the pump to a volume of water, causing the pump to operate for
a time sufficient to supply an amount of water treatment chemical to the volume of water sufficient to maintain about the
predetermined amount of water treatment chemical in the volume of water over the time period, wherein the pump is caused to
operate by a computer programmed according to Eqn. 2:
RT=((K)(MD)/(PRPM×PTD)) (Eqn. 2)
where:
RT=Run time of pump (sec)
PRPM=Pump speed (RPM)
PTD=Pump tube displacement (ml)/pump revolution
K=1776 ((sec-ml)/(min-oz)), and
MD=(PV)(DC) (Eqn. 1)
where
MD=Maintenance dose of water treatment chemical (oz.);
PV=Volume of water to be treated (gallons); and
DC=Consumption amount of water treatment chemical over the time period (oz. per 1000 gallons)
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