| 摘要 |
<p>The gas distributor serves for aerating water, in particular for supplying oxygen in biological waste-water (effluent) purification plants, but also for aerating inland waterways, the oxygen content of which has been decreased as a result of introduction of pollutants. The gas distributor includes a baseplate (2), over which is stretched a membrane (3) having fine orifices (16). Air, oxygen or other gases are pumped in between the baseplate (2) and the membrane (3) at a volume per unit time such that the membrane (3) slightly expands. Excessive expansion is prevented by a grating upper part, which extends over the entire membrane (3). The membrane (3) is connected to the baseplate (2) via an attachment device made of three shaped sections (6-8), which attachment device engages into an e.g. winding recess (11) having a dovetail-shaped cross-section. The membranes (3) are firmly clamped to the baseplate (2) by a quick-release fastening. The present design does not use any adhesive, which can damage the membrane (3). In addition, the completely fabricated gas distributor plates are supplied ready for service at the installation site, the mounting, exchange and maintenance being greatly simplified or accelerated in comparison to the previous designs. <IMAGE></p> |
