Liquid purification or separation – Processes – Chemical treatment
Patent
1986-07-02
1987-06-16
Fisher, Richard V.
Liquid purification or separation
Processes
Chemical treatment
210765, 210739, 210169, C02F 176, E04H 320
Patent
active
046735135
ABSTRACT:
Adjustment of chlorine and pH levels in swimming pool water by, (a) treating the water with material selected from the group consisting of cyanuric acid, ammelide and their salts, (b) adding material adjusting the chlorine and acid levels of the water if it has a pH above about 7.5 and adding sodium hypochlorite if the water has a pH about 7.5 or lower, (c) a set number of days later, such as a week, with automatic equipment, without taking a reading of water conditions, adding sodium hypochlorite to the water in a predetermined amount, and (d) continuing the process indefinitely by alternating steps (b) and (c) at intervals of the set number of days. The automatic equipment including a vessel containing sodium hypochlorite solution, a pool water recirculation line including a recirculation pump, and a feeder line from the vessel to the recirculation line. A valve acting on the feeder line to control discharge from the vessel including a pair of valve discs, one stationary and the other rotated through gearing by a standard, commercially available battery powered clock motor. The valve discs having passageways and ports in abutting faces that only communicate to permit discharge through the feeder line in selected clocked positions of the rotating valve discs.
REFERENCES:
patent: 3123554 (1964-03-01), Murray
patent: 4115263 (1978-09-01), James
patent: 4363728 (1982-12-01), Guglielmi et al.
patent: 4389318 (1983-06-01), Wojtowicz
patent: 4614595 (1986-09-01), Azzarella et al.
Bowen Duane C.
Fisher Richard V.
Jordan Richard D.
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