Method and apparatus for purifying water and for maintaining the

Details Method and apparatus for purifying water and for maintaining the Method and apparatus for purifying water and for maintaining the

1997-07-12

1998-11-10

McCarthy, Neil

Liquid purification or separation

Constituent mixture variation responsive

210169, 2101981, 210205, 210220, 210259, 210662, 210665, 210667, 210687, 210758, 210763, C02F 506, C02F 142

Patent

active

058338411

ABSTRACT:
The invention relates to a method and apparatus for purifying and maintaining the purity of water in a swimming pool by initially feeding into the pool water treated in an ion exchanger to render it acidic and hardness-free, lime water consisting of a clear and saturated aqueous solution of white lime or white lime hydrate being thereafter added to provide a lime-carbonic acid equilibrium, at least some of the acidic and hardness-free water being recirculated over a body of crushed limestone to establish a pH of not less than 7. Carbon dioxide and oxygen may also be added.

REFERENCES:
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patent: 5683953 (1997-11-01), Mills
Roempps Chemie-Lexikon; Franckh'sche Verlagshandlung, Stuttgart, p. 2417.
WABAG; Handbuch Wasser, 8. Auflage, Vulkan-Verlag, Essen, pp. 165-183.
Kittner et al.; Wasserversorgung, 4., durchgesehene Auflage, VEB Verlag fuer Bauwesen, Berlin.
Holluta; Die Chemie und chemische Technologie des Wassers; Ferdinand Enke Verlag, Stuttgart, 1937; pp. 48, 96-98, 108, 152.
Vom Wasser, Ein Jahrbuch fuer Wasserchemie und Wasserreinigungstechnik; XII. Band 1937; Verlag Chemie GmbH., Berlin, 1938, pp. 104-110.
Wasseraufbereitungsanlagen; Technisches Handbuch; VEB Verlag Technik, Berlin, pp. 76-77.

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