Method of and apparatus for washing and cleaning membrane filtration units
AssigneeWafilin B.V.
InventorSije Boonstra
Life of this patent
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Abstract
Method of and apparatus for washing and cleaning membranes of a plurality of membrane filtration units aligned in series, each unit being part of a circuit provided with a recirculation pump, each circuit being provided with an inlet and an outlet. Washing liquid is supplied to the circuits in an amount exceeding the predetermined capacity of the recirculation pump.
Claims15
Method of washing and cleaning a plurality of membrane filtration units (1,2,3) aligned in series, each of said units (1,2,3) being part of a circuit (6,7,8) provided with a recirculation pump (12), said circuits being valvelessly directly interconnected (9,10,11) in seriation whereby the respective unit of each of the circuits can be fed with liquid to be purified and impure liquid be discharged, which either serves as supply for a consecutive circuit or which is discharged, and by subsequently passing a washing liquid, through membrane filtration units aligned in series, at low pressure wherein a quantity of washing liquid is fed to the circuit inlet (9,10,11) which quantity exceeds the predetermined pumping capacity of the recirculation pump (12).
Apparatus for washing and cleaning a plurality of membrane filtration units, aligned in series, each of said units being accommodated in a circuit (6,7,8) comprising a recirculation pump (12), each circuit (6,7,8) being provided with a circuit inlet (9,10,11) for feeding a liquid to be purified into the respective units and a circuit outlet (13,14,15) for the discharge of impure liquid from the circuit, which circuit outlet (13,14,15) is valvelessly directly connected with a consecutive circuit or with an apparatus outlet (19) and a washing liquid inlet (5) the apparatus comprising a washing liquid supply pump (24,32) wherein (the apparatus comprises a) said washing liquid inlet pump (24,32) having a pumping capacity exceeding that of the predetermined pumping capacity of the recirculation pump (12) of a circuit into which washing liquid is fed.
Dependencies are inferred from the claim text.