Filtration

1. System
2. Treatment
3. Filtration
4. Installation

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   Download

   White Paper on Filtration Need

How it works

Watch the video to see how the filtration system works.

The 2004 IMO International Convention for the Control and Management of Ships’ Ballast Water and Sediments stipulates in Section B that all ships shall remove and dispose of sediments from spaces designated to carry ballast water in accordance with the ship’s Ballast Water Management plan.

Many organisms have evolved a capacity to endure stressful environments such as low dissolved oxygen concentration, desiccation, or toxins. Filtration eliminates these large, hearty organisms as well as sediment prior to the main disinfection treatment. In order to meet proposed US standards anticipated to be 100x more restrictive than IMO specifications, filtration is essential. For more on the critical necessity for all ballast water treatment technologies to filter out these organisms see our white paper –“To filter or not to filter”.

Ecochlor’s filtration of ballast water, specially designed to meet IMO D2 standards, is accomplished with unique 40 micron filtration technology that automatically cleans without interruption to ballasting operations. The filter element is fabricated from 904L stainless steel and the housings are specially coated for long term resistance to corrosion. Ecochlor’s space efficient filtration system can be installed in any convenient orientation either horizontally or vertically. For system specifications, see table below

A Scalable System

Ecochlor's systems have been successfully tested at many locations throughout the world, including the highly sedimented Yangtze river in China with no drop-off in performance.

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2. The system is scaled for different sized ships. Because of the unique design, larger systems are particularly cost competitive when compared to other technical approaches.

Filter sizes for every application

Flexible Modular Approach

The modular filtration system enables a vertical filter to operate in the exact same manner as a horizontally installed unit while significantly reducing its footprint where space is tight.

Two Stages for Comprehensive Filtration

The Ecochlor^® Filtration System has two stages, coarse filtration and fine filtration. To prevent large objects – such as fish and foreign materials – from entering the filter’s cleaning mechanism, coarse filtering is carried out in the inlet chamber. Once the raw water passes through the coarse screen it emerges through the fine screen and flows into the system. The filtering process creates a “cake” of sediment on the surface of the fine screen surface. The filtration process creates differential pressure across the screen that rises as the “cake” enlarges, until predetermined value is reached (normally 0.5 bar) to activate the flushing process.

1. Inlet
2. Primary Course Screen
3. Weaver-wire Screen
4. Suction Scanner
5. Proximity Nozzles^®
6. Air Release Valve
7. Outlet
8. Flash Water Discharge Outlet
9. Flush Valve
10. Suction Pump
11. Worm Gear and Motor

Automatic Self Cleaning

Once the differential pressure value is reached, a self-cleaning action starts automatically. This cleaning action involves suctioning dirt off the fine screen and flushing it out. Once a flushing command is given, the flushing valve opens to the atmosphere, causing a pressure drop in the flushing chamber that suctions dirt off the fine screen through the collector and flushing valve. Simultaneously, the worm-gear of the electric motor spins the collector in a helical motion. The suction nozzles move across the entire screen surface while cleaning the clogged screen. A programmable controller monitors the process and, when necessary, activates intensive flushing cycles to overcome heavy dirt loads.

Unique Filter Screen Structure

The unique screen technology enables it to have an unparalleled zooplankton removal rate. Made out of 4 layers of sintered stainless steel screens, it is a reinforced filtering element requiring absolutely no support.

Continuous Screen Cleaning

The unique suction nozzles allow 100% cleaning of the screen after each flush cycle ensuring continuous, uninterrupted filter operation without any risk of clogging.

Ecochlor^® System Specifications