Deep well water regeneration - has pulsed flow of medium through the filter w.r.t. pH values and filter resistance with independent action on separate sections

摘要

For the combined mechanical/chemical regeneration of a deep well, an acid or an acid mixt. with a given pH value is pumped to the working zone (13) in a sufficient vol. to give a mixt. with the well water of a required pH value. The working zone (13) is subjected to air or cleaning water pressure at a level w.r.t. the filter resistance and/or the constantly measured pH or electrical or chemical values at the suction stage (15), the regenerating medium is compressed into the gravel layers. The feed and dosage of the regenerating medium is controlled w.r.t. the constantly measured values and the filter resistance, and interrupted w.r.t. the nominal values. During feed interruption, the suction pump maintains its action until the constantly measured values register the min. requirements for the well water quality. ADVANTAGE - The separate working sections of the filter stretch can be operated individually within the deep well to be cleaned with good sealing of the working section. The regenerating medium has an in-depth effect through the pulsation compression/suction through the filter gravel and neighbouring layers. The filter resistance is measured objectively, and the operating periods are reduced by monitoring important pH and other process parameters. The chemical consumption is reduced to a min.