Challenge
Geiger® MultiDisc®
Barka, Oman
As the largest seawater desalination plant in the Sultanate of Oman, Barka Desalination Plant – Phase 4 (Barka IWP) has installed the Innovative Geiger® Cable-Operated Bar Screens and Geiger MultiDisc® Travelling Water Screens with a Spray Water System and the Geiger® Cathodic Protection System with Impressed Current.
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Supply of screens and associated cathodic protection system as part of the construction of the BARKA Independent Water Plant (IWP). The whole equipment had to meet the highest requirements for corrosion-resistant design and material quality.
Solution
For the first stage in the mechanical screening of seawater (coarse screening), the efficient and robust Geiger® Cable-Operated Bar Screen was implemented. For the second (fine screening/filtration) the innovative, compact and low-maintenance Geiger MultiDisc® in order to protect pumps and downstream processes has been installed.
All raw water cleaning machine parts in contact with the seawater were either made of DUPLEX stainless steel and resistant polyamide PA6 in order to achieve the highest possible corrosion resistance. Also screws, nuts and washers of the immersed parts were made of DUPLEX stainless steel. In addition, the whole equipment is protected by a Geiger® Cathodic Corrosion Protection System with impressed current.
The Geiger MultiDisc® Travelling Water Screens have also been redesigned at the plant among other things with panels made of glass fibre reinforced plastic. A significant advantage of the Geiger Multi Disc® compact solution has been the shortening of 3 intake channels (civil structure) by over 8 metres compared to a conventional band screening design.
Key Features
Geiger MultiDisc® Screens in compact design
- 8 m shorter intake channels with a straight through-flow design and no backwalls (civil structure and footprint savings)
- Fast and simple plug-in installation
- Low operating costs: Only one maintenance-free side bar chain
- Easy maintenance; mesh panels can be changed at floor level (no need for channel dewatering)
- Lower head loss: water only passes through the screen once
- Intensive and efficient cleaning of the mesh panels
- Zero carryover of debris to the clean water side
Geiger® Cable-Operated Bar Screens with automated cleaning
- Safe collection and removal of bulky flotsam
- High load capacity of the cleaner carriage
Geiger® Cathodic Protection System with Impressed Current
- Suppression of the electrochemical corrosion as a result of the in-feed of protective current
Technical Data
- 3 Geiger® Straight Bar Screens with rake cleaning device and Duplex screws
- 3 through-flow, zero carry-over Geiger® MultiDisc® 500 Travelling Water Screens with Duplex screws and a spray water system (tubes made of Super Duplex)
- Control cabinet for fully automatic operation and a Geiger® Impressed Current Cathodic Corrosion Protection System (ICCCP)
| Channel | |
| Number of channels | 3 |
| Channel width | 2.5 m |
| Channel depth | 12.59 m |
| Flow Rate per channel | 13,678 m³/h |
| Water Source | Sea Water |
