Apparatus and method for backwashing filter membrane modules
First Claim
1. An apparatus for backwashing filter membrane modules, the filter membrane modules being arranged in parallel and separated into a plurality of module rows within a module rack, each filter membrane being supplyable with raw water through a respective port at an end face thereof via respectively associated lines, and each filter membrane module including a drain port on a wall side for filtrate, to which a filtrate collection line is connected for draining the filtrate, wherein valve means are provided to control at least one filtration and backwashing mode,wherein, in the backwashing mode, a supply-side control valve of one module row connected to a first line of the lines carrying raw water is closed, but an associated drain-side control valve of the one module row connected to an other line of the lines serving to drain backwashing water is open, whereas supply-side control valves of other module rows of the plurality of module rows in the first line are open, to ensure backwashing of the one module row by the filtrate simultaneously produced by the other module rows by pressing the filtrate drained in a collected manner via respective drain ports of the other module rows and collected in the filtrate collection line backwards through the one module row.
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Accused Products
Abstract
An apparatus and a method for backwashing filter membrane modules arranged in parallel in the form of a plurality of module rows within a module rack and supplyable with raw water through supply/drain ports at each end face via respectively associated supply/drain lines, and each including a drain port on a wall side for the filtrate, to which a filtrate collection line is connected for draining the filtrate, wherein valve means are provided to control at least one filtration and backwashing mode, wherein, in the backwashing mode, a supply-side control valve of the first supply/drain lines carrying raw water of a module row is closed, but an associated drain-side control valve of the other supply/drain line of one module row serving to drain backwashing water is open, whereas the remaining supply-side control valves in the supply line carrying raw water of the remaining module rows are open, to ensure backwashing of the one module row of the module rack by the filtrate simultaneously produced by the other module rows.
15 Citations
8 Claims
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1. An apparatus for backwashing filter membrane modules, the filter membrane modules being arranged in parallel and separated into a plurality of module rows within a module rack, each filter membrane being supplyable with raw water through a respective port at an end face thereof via respectively associated lines, and each filter membrane module including a drain port on a wall side for filtrate, to which a filtrate collection line is connected for draining the filtrate, wherein valve means are provided to control at least one filtration and backwashing mode,
wherein, in the backwashing mode, a supply-side control valve of one module row connected to a first line of the lines carrying raw water is closed, but an associated drain-side control valve of the one module row connected to an other line of the lines serving to drain backwashing water is open, whereas supply-side control valves of other module rows of the plurality of module rows in the first line are open, to ensure backwashing of the one module row by the filtrate simultaneously produced by the other module rows by pressing the filtrate drained in a collected manner via respective drain ports of the other module rows and collected in the filtrate collection line backwards through the one module row.
Specification