Leistritz Debuts Three New Pumps
The offshore oil and gas industry uses Floating Production, Storage and Off-loading (FPSO) vessels to process and store gas or oil until it can be unloaded onto tankers or forwarded through a pipeline. Leistritz Screw Pumps are responsible for boosting the produced water into a hydro cyclone where the remaining oil and sand will be extracted.
Since 1924 Leistritz Pumpen GmbH has been manufacturing screw pumps for almost any application in the shipbuilding industry and has established itself as a leader worldwide. At this year’s SMM the company presented its latest pump developments for various tasks: unloading bitumen and asphalt tanks, compensating undesired heeling and emptying tanks in the event of an accident.
Universal Cargo Pump
“Great demands are postulated from cargo screw pumps, which have to properly unload the full range of high to low viscous products,“ said Heinz-Dieter Roß, Managing Director, Leistritz Pumpen GmbH. “With tank depths of more than seven or eight meters things become quite difficult.” The reasons for this are: Standard deck installations of pumps are subject to cavitation problems. Furthermore, proper stripping and draining of the tank is not provided. The Universal Cargo Pump is a pump system comprising pumps from the series L2 and L5 which are installed in a separate barrel, normally hanging from the deck in the aft cargo tank. The installation inside the barrel omits the need of an otherwise required pump room. The barrel works as a large suction chamber providing the pump with additional suction ability. The tank can almost be completely emptied of all product quantities (even high viscous fluids like bitumen or asphalt) which are handled by the pump. With at least two pumps installed in a barge, each pump can work with full unloading capacity.
Anti-Heeling Pump
Another issue Leistritz focused on is the further development of anti-heeling systems. Johannes Döring explains: “Such systems correct undesired tilts by pumping ballast water back and forth between the heeling tanks. Reversible propeller pumps are the most common pumps used on anti-heeling systems for ballast water flow rates of more than 300 cu. m./hr. Systems with flow rates less than 300 cu. m./hr. usually work with a non-reversible centrifugal pump which needs a complex four-valve system for the reverse mode.“ Leistritz does it differently: With the Leistritz Pump L2NG the company introduces a 2-spindle positive replacement pump granting a speed-controlled and reversible operation. It is suitable for pressures of up to 3 bar and flow rates of 10 to 400 cu. m./hr. “This is an important advantage which also facilitates the installation in smaller ships,” says Döring. Another benefit is the direct correlation of pump flow and pump speed as well as the rather low impact of varying operating pressures, allowing a very smooth and accurate flow control.
Oil Recovery Pump
“When an accident at sea happens, not only the ship’s cargo but also the ship’s fuel supply is at risk,“ said Heinz-Dieter Roß in describing the initial idea behind the third novelty introduced at the SMM: the Leistritz Oil Recovery Pump. It is a 3-spindle pump which is not only used in a Fast Oil Recovery System (FOR), which is a pre-installed, passive system on ships to empty leaking tanks in case of damage. It can also be used as an independent system. “The challenge in designing such a pump was the fact that it had to be small enough to fit into a pipe to be compatible with the FOR system,” said Roß. The previous oil recovery system involves injecting seawater into the tank using a pre-installed auxiliary pipe. The oil which is lighter and relatively insoluble in water is pushed upwards through a disposal pump. The oil is pumped out there and the contaminated water remains. But in a leaky tank this principle is useless.
(As published in the October 2014 edition of Maritime Reporter & Engineering News - http://magazines.marinelink.com/Magazines/MaritimeReporter)
Other stories from October 2014 issue
Content
- They Said It ... Paul N. Jaenichen, U.S. Maritime Administrator page: 11
- Cutter Suction Dredge CSD500 from Damen page: 18
- Quantitative Risk Analysis for LNG Terminals page: 20
- Offshore Supply Vessels: The U.S. Can Compete page: 22
- New Solutions for Electric Ship Propulsion page: 24
- Classic Design with Tomas Tillberg page: 28
- Innovative Enviroship Concept Wins Big page: 30
- Design (R)Evolutions page: 32
- Condition Based Monitoring & Saving Cash page: 38
- HVAC Systems: The Stealthy Drain on Energy Efficiency page: 50
- What’s New in Floating Production? page: 52
- SSI Releases ShipConstructor 2015 page: 54
- SENER Releases FORAN V70R3.0 page: 56
- MAN Diesel & Turbo Debuts New High-Speed Engine page: 58
- VULKAN Couplings Debuts New Products page: 59
- Cat Unveils MaK M 25 E Platform page: 60
- ZF Marine Debuts ZF W10000 Transmission page: 61
- Wärtsilä’s New CPP System page: 61
- Hatz Presents New Engine Concept Study page: 62
- Schottel Shifts Focus Offshore at SMM 2014 page: 62
- Wärtsilä’s LNGPac: AIP from DNV GL page: 63
- GreenSteam Optimizer on Display page: 63
- Leistritz Debuts Three New Pumps page: 64
- Van Heck Advances Dredging Innovation page: 65
- Georg Fischer Piping DWV Fittings page: 65
- Bestobell Extends Valve Range page: 65
- Teekay Couplings Plastlock Pipe Coupling page: 66
- W&O Actuated Valve Solution for Vigorous page: 66
- Alfa Laval Launches PureSOx 2.0 page: 67
- Meet the Transas T-Bridge page: 68
- New Waste Energy Converter from Calnetix page: 68
- GAC’s EnvironHull HullWiper on Display page: 68
- BMT Showcases Monitoring Portfolio page: 68
- GEA’s CatFineMaster Debuts at SMM page: 70
- Engine Supervision and Management Software page: 70
- GPS-controlled Food Waste Discharge page: 70
- New Raytheon Anschütz Navigation Radar page: 70
- Raytheon Anschütz ShipGuard page: 71
- GNS Launches First VMS page: 71
- Revamped XChange page: 71
- GEA Heat Exchangers page: 71
- WR On-stack Scrubber Emission Monitor page: 71
- Improved Controller for Rexroth AHC page: 71
- NavStation Launched at SMM page: 71
- Wild Well’s Subsea Capping Stack page: 71
- Kelvin Hughes Product Range Expands page: 71