| 主权项 |
1. A method for blowing off a gaseous contaminant from crude water in the production of drinking water, said method comprising the step of
introducing the water containing the gaseous contaminant into the top of a shielded aerator, said aerator comprising means for forming drops at the initiation of the treatment process, and means for causing division of said drops by contact therewith, said latter means being arranged below the means for forming drops, wherein the means for causing division of the drops comprise a plurality of tubular elements in the form of pipes having reticulate pipe walls, said tubular elements being placed in horizontal layers of several parallel tubular elements stacked in such a way that the longitudinal axes of the tubular elements in one layer are angularly displaced in relation to the longitudinal axes of the tubular elements in the one or more adjacent layers; and letting the water pass through said aerator to the bottom thereof by the force of gravity, wherein air is introduced to the bottom of the aerator and is drawn to its top and discharged together with blown-off contaminant by the aid of a pump at the top of the aerator, and wherein bubble formation and horizontal redistribution of the water is brought about as it during its passage through the aerator passes through one or more perforated sheets, which are intercalated between a number of said horizontal layers of tubular elements. |
