Ballast Water Treatment Systems - RayClean
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Catalog excerpts

Ballast Water Treatment Systems - RayClean - 1

DESMI Ocean Guard RayClean Ballast Water Treatment System PROVEN TECHNOLOGY DESMI

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Ballast Water Treatment Systems - RayClean - 2

RayCleanTM IMO, DNV-GL, Lloyds Register & Class NK Type Approved USCG AMS Accepted RayCleanTM Ballast Water Treatment System is the leading system in the marine industry with unrivalled treatment performance and lowest energy consumption in class. RayCleanTM is IMO, DNV-GL, Lloyds Register and Class NK type approved and tested to meet the latest requirements and guidelines adopted by the International Maritime Organisation (IMO) and the US Coast Guard, from which the system has also earned the Alternate Management System (AMS) acceptance. RayCleanTM can be used in all water salinities and...

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Ballast Water Treatment Systems - RayClean - 3

The RayClean™ ballast water treatment system is type approved by IMO and DNV-GL and can treat ballast water at any flowrate from 30 - 3000 m3/h. The system is based purely on mechanical treatment and therefore it does not involve any use of chemicals or active substances. First treatment step is filtration, second step is UV treatment. RayClean™ has no salinity or temperature limitations and has been proven effective in water with UV-T (UV transmission) as low as 0.33, which sets the industry benchmark! Ballasting Operation Mechanical Filtration UV-C Radiation Ballast Water Tanks...

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Ballast Water Treatment Systems - RayClean - 4

missio What is UV Transmission? UV-T is a measure of the capability of UV light to penetrate water. When the UV-T is high, close to 100%, the water is very clear and the UV light can penetrate deep into the water. On the other hand, when the UV-T is low (below 50%), the water is very unclear and the UV light can only penetrate a limited distance into the water. In the figure above, two cases with different UV-T are illustrated; one case with a high UV-T of 90%, and another case with just 50% UV-T. Table 1 shows how rapidly the UV intensity decays away from the UV lamp. With a UV-T of 90%,...

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Ballast Water Treatment Systems - RayClean - 5

Limitations of Ballast Water Treatment Systems It should be acknowledged that ALL BWTS have limitations. Typically, chemical systems (e.g. electro-chlorination) have limitations related to the salinity of the water to be treated, its temperature or the amount of organic material contained in the water, whereas UV-based BWTS have limitations with regard to the UV transmission of the water to be treated. In other words, all BWTS have special circumstances under which they cannot be expected to treat the water according to the IMO discharge standard. The trick for the ship owner is to select a...

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Ballast Water Treatment Systems - RayClean - 6

Simple & Fully Automatic Operation UV Irradiation The UV treatment takes place in units with a flow capacity of 300 m3/h. Each UV unit is equipped with 60 highly efficient low-pressure UV lamps. These lamps are roughly twice as energy-efficient as the widely used medium pressure UV lamps, and as they work at much lower temperature they have superior lifetime and no issues with regard to fouling. Constant online monitoring of the UV intensity inside each unit is used to dim the UV lamps in very clear water (high UV transmission) in order to save energy and to reduce the flow through the unit...

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Ballast Water Treatment Systems - RayClean - 7

Filtration RayClean™ has a self-cleaning filter in order to remove the vast majority of organisms larger than 50 micron. During de-ballasting, the filter is used to ensure that organisms, which are small or soft enough to pass the filter on uptake, will be stopped by the filter mesh at discharge, treated and rendered inactive. Furthermore, use of the filter during de-ballasting protects the UV unit from any debris or dirt from the ballast tanks, such as rust flakes or pieces of ballast tank coating. The RayClean™ filter system has a unique and patent pending way of recirculating the filter...

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Ballast Water Treatment Systems - RayClean - 8

Our systems can be delivered as loose components, skid-mounted or containerized. Loose components means that the system will be assembled onboard the vessel, and this is often necessary for retrofit projects or installation of large systems. We often deliver skid-mounted systems as they are the optimum solution for newbuildings and small to medium size systems. Complete containerized systems are a third option, which is used for retrofit on container vessels or on the deck of tankers with no space available elsewhere. A fourth option is semi-skid mounted systems, which means that filter and...

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Ballast Water Treatment Systems - RayClean - 9

The System can be Delivered in a Special EX Version for Installation in Hazardous Areas The RayClean-EXTM ATEX certification enables the system to be installed directly in Zone 1 hazardous area, Ex II 2G EX pxb [ia/ib] IIC T4 Gb. Our ATEX certified version of RayClean™ enables installation in all typical hazardous areas found on board normal commercial tankers and gas carriers. The general protection principle used is purge and pressurization, which means that all potential ignition sources are covered by enclosures that are purged and pressurized with air in order to maintain an...

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Ballast Water Treatment Systems - RayClean - 10

Say “Yes” TM to RayClean because... All Water Salinities RayCleanTM is proven effective in all water salinities, including fresh water, muddy water & cold water. This gives your ship the flexibility of travelling around the world, making sure de-ballasting is allowed in every harbour. Low Energy Consumption With RayCleanTM you will have very low operating expenses. Due to the use of highly efficient lowpressure UV lamps, the energy consumption is the lowest in class and the lifetime of these lamps is a staggering 12,000 hours. Safety Safety is a top priority and many steps have been taken...

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Ballast Water Treatment Systems - RayClean - 11

The low power consumption is achieved by use of highly energy-efficient low-pressure UV lamps combined with lamp dimming in clear water (high UV-T) and flow reduction in very challenging and unclear water (low UV-T). By monitoring the UV intensity inside each unit the lamps can be dimmed when the intensity is higher than the critical level, and the flow can be reduced when the intensity is lower than the critical level. This results in a constantly applied UV dose independently of the UV-T of the water to be treated, and enables the RayClean™ system to treat water with UV-T anywhere from...

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