PureDry
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PureDry Waste fuel recovery Application Rising fuel oil costs and more stringent emissions controls are putting increasing pressures on owners and operators of dieselengine installations on land and at sea. To address these challenges and improve overall performance, owners and operators are undertaking measures, such as reduced engine speed and the introduction of emission control technologies, to improve fuel efficiency and reduce emissions. Waste fuel recovery is also gaining ground as an effective fuel and emissions reduction method, according to the International Maritime Organization MEPC.1/Circ. 642 guidelinesfor oily waste handling systems used in machineryspaces of diesel engine installations. PureDry from Alfa Laval Reliable and effective, the PureDry waste fuel recovery system is an automated modular system for the coninuous t recovery of fuel oil from waste fuel oil from machinery spaces of diesel engine installations onboard ships and in power plants. PureDry effectively separates waste oils into three phases: • Water containing less than 1,000 ppm oil • Oil containing less than 5% water • Super-dry solids to be landed ashore as dry waste The recovered fuel oil is returned to the fuel oil bunker tank for reuse. Easy to install and easy to use, the system is compact and modular, providing installation flexibility and convenience. Intelligent automation provides operational flexibility, enablingadaptation to varying feed conditions without requiring additional process water or generating additional waste. With the installation of a second system, PureDry also provideseffective pre-treatment of oily waste, such as waste lube oil and other oils, separating waste into super-dry solids, concentrated oil and water suitable for downstream processing systems, such as bilge water treatment systems. Compact and modular, the Alfa Laval PureDry waste fuel recovery system effectively removes water from waste oil and enables the reuse of heavy fuel oil (HFO) fraction as fuel, thereby minimizing the handling costs associated with oily waste and delivering up to 2% savings in fuel oil costs.

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Features and benefits Substantial fuel savings By recovering heavy fuel oil (HFO) from waste oil for reuse, PureDry helps cut fuel bills by up to 2% and generally pays for itself within 12 months of commissioning. Minimal solids handling and disposal costs PureDry removes the maximum amount of water from waste oil, reducing oily waste that requires costly onshore disposal by 99% while minimizing the amount of oily waste forwarded to downstream systems, such as bilge water treatment systems. Priming water Increased payload capacity PureDry significantly reduces waste oil and wastewater...

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For optimum separation efficiency, the heater raises the temperatureof the unprocessed liquid to the desired feed temperature of 95°C. PT The BX 50 high-speed centrifugal separator continuously processes waste oil, separating oil, water and solids. The separator bowl containing a disc stack rotates at high speed, and solids from the waste oil feed accumulate at the bowl periphery. From the periphery, solids are continuously discharged by a patented spiral-shaped device called the XCavator into a container under the separator. The amount of solids accumulated is continuously monitored by...

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Separator insert Separator rotor complete The Maintenance and Service by Exchange (MSE) Kit for the PureDry waste fuel recovery system. Solids production The typical amount of super-dry solids produced when processingfuel from a diesel engine running on HFO is approximately 25–50 g/MWh, which is roughly equivalentto the productionof 10–20 kgs of solids every 24 hours. Capacity and sizing The PureDry system operates at a throughput capacity of up to 500 litres per hour, depending on the amount of emulsionsand whether the chemical dosing unit is used. In most cases, a single PureDry...

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