Wastewater lifting station

US9873069B2 · kind B2 · utility

Assignee

• KSB Aktiengesellschaft · DE

Inventors

• Michael Becker · Knittlingen, DE
• Enrico Mueller · Frankenthal, DE

Key dates

• Filing date: Jul 8, 2014
• Grant date: Jan 23, 2018
• Expiry date: Jul 10, 2034

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E03F5/22
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A wastewater lifting station is provided, in which at least one solids collection tank contains at least one screen for guiding wastewater therethrough and retain solids. The screen divides the solids collection tank into a region containing solids and a region free of solids, and is connected in a pivotable manner by at least one hinge to a flange of the solids collection tank. The screen in an edge region away from the hinge has a rake of comb-type webs and holes that are open on one side in the screen plane. The wastewater containing solids flows through a feed into the collection tank, is filtered through the screen, and the wastewater that is free of solids is collected in a tank downstream. When the wastewater lifting station pumps, the wastewater that is free of solids is pumped by a pump in counterflow through the screen into a pressurized line while the feed is shut off by a check valve, and the screen pivots about the hinge and is back-flushed during the process. Reliable cleaning of the screen, even of fibers, is achieved during pumping owing the rake shape and the pivoting of the screen.