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Southern Manufacturing

Farnborough, Hants(GU14 6TQ)

20/04/2021 - 22/04/2021

Southern Manufacturing and Electronics is the most comprehensive annual industrial exhibition in the (more)

PPMA Show 2021

NEC, Birmingham(B40 1NT)

28/09/2021 - 30/09/2021

PPMA Show 2021 will be the UK’s largest ever event dedicated to state-of-the-art processing and (more)

Advanced Engineering 2021

NEC Birmingham(B40 1NT)

03/11/2021 - 04/11/2021

Join us in our 12th and most important edition to date, as we invite engineers and management from all (more)

Gear motors keep water treatment systems running through flood conditions

Gear motors keep water treatment systems running through flood conditions

Since long before the industrial revolution, manufacturers have extracted water from local rivers and streams. The process is still widely used today, in applications from energy generation to paper making. Unlike their forebears, however, modern systems inevitably include various treatment processes to ensure the extracted water meets appropriate quality, safety and process control standards.

nrw Anlagentechnik specialises in the production of stainless steel products for water and wastewater treatment in a wide variety of municipal and industrial applications. The company has developed a range of vertical screens that are used to address one of the key challenges inherent in river water extraction: solids.

Natural river water carries a wide range of materials, from algae and plant debris to aquatic fauna. All this material can be removed by filtration, but doing that puts additional load on treatment equipment, consumes energy and creates a waste stream that must then be handled by the operator. Far better to ensure that such material is prevented from entering the treatment system in the first place.

nrw Anlagentechnik vertical screens achieve that objective using perforated stainless steel elements immersed in the water at the extraction point to prevent solids above a certain size from entering the water supply. Depending on the application, the screens use perforations of between 1 mm and 20 mm diameter. To ensure the screens do not become blocked over time, a system of rotating polypropylene brushes keeps the outer surface of the screens clear, returning debris safely and continually back into the water flow.

For many years, nrw Anlagentechnik, has specified Bauer gear motors to operate its vertical brush systems. The Bauer gear motors provide compact, robust, and reliable operation, delivering the required low rotation speed – typically less than 2 revolutions per minute – without the need for secondary powertrain components.

In river water extraction applications, the ability of the motor system to cope with demanding environmental conditions is of paramount importance. Not only are the gear motors mounted in a position exposed to the elements and just a small distance above the water surface, but in some installations seasonal fluctuations in the water level can mean the entire installation is periodically submerged, usually during seasonal floods.

For these applications, Bauer, part of the Altra Industrial Motion Corporation, supplies special IP68-rated versions of its motors, which are fully submersible and impervious to water and dust ingress. In an installation in South Germany, for example, the customer specified Bauer Gear Motors, with a power rating of 0.12kW. The motors were supplied in the IP68 configuration, with a special paint finish, fully compliant with national Water Industry Mechanical and Electrical Specifications.

 

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