Method and apparatus for treating water by ion exchange

Details Method and apparatus for treating water by ion exchange Method and apparatus for treating water by ion exchange

1981-04-07

1982-09-14

Cintins, Ivars C.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210681, 210686, 210189, 210269, 210290, B01D 1504

Patent

active

043494420

ABSTRACT:
A receptacle has therein a lower bed of mixed anionic and cationic ion exchange resins and an upper bed of cationic ion exchange resins. The upper bed rests directly on the lower bed without any mechanical separation therebetween. Regeneration of the upper bed is achieved by removing the upper bed from the receptacle without removal of the lower bed. An output is located adjacent the boundary between the upper and lower beds. Pressure is exerted on the upper surface of the upper bed, and simultaneously a thin substantially horizontal spray of water is directed along a horizontal plane which is adjacent the boundary, thereby directing the water spray and the cationic resins of the upper bed through the outlet. The cationic resins are regenerated and returned to the receptacle to reform the upper bed. Prior to return of the regenerated cationic ions, the lower bed is dried by draining water therefrom to prevent the returning cationic resins from mixing with the resins from the lower bed.

REFERENCES:
patent: 3385787 (1968-05-01), Crits et al.
patent: 3394079 (1968-07-01), Miller et al.
patent: 3475330 (1969-10-01), Gilles
patent: 3575294 (1971-04-01), Hirowatari et al.
patent: 3719591 (1973-03-01), Crits

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