| 摘要 |
The invention relates to a method for washing hollow-fibre membranes in a filtration equipment including at least three modules (M1, ..M5), each module including a plurality of hollow fibres (3) connected in parallel, one end of the fibres being closed during filtration, and the liquid to be processed being fed by an inlet duct on which the modules are connected in parallel, the processed liquid being collected by a manifold (6) including a production valve (7), the washing being carried out by scrubbing the fibre surface on the concentrate side while the processed liquid manifold is closed, the washing liquid being discharged by a waste manifold (4) connected in parallel to the module scrubbing outlets, an upstream valve (V1..V5) being provided between each module and the inlet duct while a downstream valve (R1..R5) is provided between each module or module group and the waste manifold. The scrubbing of a module (M2) is carried out by closing the downstream valves (R1, R3, R4, R5) of the plurality of other modules as well as the processed liquid production valve (7), and by keeping open the downstream valve (R2) and the upstream valve (V2) of the module to be scrubbed so that the entire flow crosses the scrubbed module at a flow speed that is a multiple of that existing during a normal filtration operation. |
