摘要 |
In the filtering system for fluid soiled with particles, the sand of the filter bed which is loaded with the filtered particles is cleaned in a sec. circuit using a part of the dirty fluid which still has to be filtered. This is directed at the sand in a counter stream, so that clinging particles are detached from the sand and removed. Pref. the part of the untreated fluid, for use in the sec. circuit, is given a spiral flow pattern to act against the movement of the sand and particles through gravity. The vol. of untreated water used in the sec. circuit and/or the flow speed can be adjusted according to the fluid flow through the sand filter bed in the prim. circuit as the sec. circuit uses a diversion from the sand filter bed. ADVANTAGE - The operation reduces the amt. of clean water needed to clean the sand of the filter bed to a min., e.g. using 2-3% of the cleaned water.
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申请人 |
HOMPF, DIETER, 8500 NUERNBERG, DE;BINZER, ULRICH, 8565 KIRCHENSITTENBACH, DE |
发明人 |
HOMPF, DIETER, 8500 NUERNBERG, DE;BINZER, ULRICH, 8565 KIRCHENSITTENBACH, DE |