Method and apparatus for purifying water
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United States of America Patent
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Jun 14, 1994
Grant Date -
N/A
app pub date -
May 11, 1993
filing date -
May 13, 1992
priority date (Note) -
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Abstract
When applying a method and an arrangement for purifying water, an inflow of contaminated water is converted to a pressure elevated flow which is divided in a purifying unit into a purified outflow and a contaminated outflow, which in turn is divided into a return flow and a reject flow. With the intention of providing a large return flow under high pressure for the purpose of rinsing clean the filter unit during operation, the return flow includes a first return flow (return conduit 24) which is recycled to the pressure-elevated flow (pressure conduit 16) and which is larger than the inflow, and further includes a second return flow which is pressure-restricted with respect to the first return flow, and the second return flow is returned to the inflow.
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