Dredge Yard to build ECO200 Auger dredger

Dredge Yard recently signed a contract to design, manufacture and deliver an ECO200 Dredger with auger head. The auger dredger has a dredging depth of 6 m and comes with a 1500 m discharge pipeline. The ECO200 Auger will be delivered to a mining corporation in West-Africa. There the ECO200 Auger Dredger will be used for mining activities in a shallow river. The removed sand & gravel is then processed to capture gold and diamonds.

DredgeYard ECO200 Auger dredger with knives

DredgeYard ECO200 Auger dredger with knives

Special auger head

The economic auger head is designed to excavate with minimum spillage and provide the best suction performance. For this project, Dredge Yard is going to install small extended knifes on the auger. The objective of these knifes is to loosen the compacted river sands to be transported by the screw motion of the auger to the suction mouth. Sufficient pumping power is provided to transport the dredged material over a discharge length of more than 1500 m.

Shallow draft

The ECO200 Dredger will be built out of two main pontoons. This will provide sufficient floating capacity, but maintaining a shallow draft of around 0.8 m (2.65 ft). This allows the dredger to operate in shallow waters.

Customized dredging system for TSHD

Dredge Yard delivered a new customized dredging system for a trailing suction hopper dredger. The system consists of several components, such as dredge valves with inspection holes on both sides. The delivered dredge pumps are suitable for pumping and handling all slurry, mud, sand, gravel, rocks and debris. We also incorporated our turning glands with an adjustable turning range by using dismountable stoppers.

As you can see on our project page, we designed a new customized wear resistant steel loading box for the trailing suction hopper dredger. This way, the slurry can easily be pumped into the hopper for transport. Our hopper overflow drains the excess water, making it more efficient, because it leaves more room for the payload.

Of course this dredging system would not be complete without a drag head with jet water nozzles, suction arm and gantry. Dredge Yard also provided bow couplings, a sliding piece and bottom doors.

View the full project on our project page.

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Dredge Yard builds ECO200 dredger in stock

Dredge Yard built the ECO200 dredger in stock as part of a program for building several medium size and small dredgers in stock. We can equip the dredger with a cutter head, plain suction dredge or an auger head. These various options make the ECO200 a very versatile dredger. Using an underwater heavy-duty dredge pump can extend the dredging depth. A hydraulic drive controls and drives the heavy-duty dredge pump.

Easily transportable

The entire dredger fits inside standard containers for safe and cost-effective transport to any port in the world. Dredge Yard experts or the clients technical staff can assemble the dredge on site. The ECO200 is designed for one operation and can be easy controlled from the air-conditioned cabin. The underwater dredge pump provides a high ratio of mixture and increased slurry flow that optimizes the production output. The dredger is available for use in May 2017. Contact us for more information

Dimensions of the ECO200 dredger in stock

Length overall 16.2   m
Length of pontoon 11.5   m
Breadth overall 3.0    m
Depth of pontoon 1.2    m
Dredging depth 6.0    m
Design draught 0.8    m

New Website for Dredge Yard

Dredge Yard, dedicated to the market of dredging and mining components, equipment and technology, launched its new website last week. With the new website the focus products will be the ECO200 dredger, ECO350 dredger, cutter suction dredger 450 and cutter suction dredger 550. It gives the visitor the easiest experience to find more information about dredging & mining components.

New website design

The modern but simple web design, readable images and meaningful content made the website more user friendly and clear about the activities they do. Visitors have more overview on the various subjects which are described. Next to the dredger pages there is also information about different components which the company manufacture and supply.

In the near future Dredge Yard will focus on the two smaller dredgers and the cutter suction dredgers. The website will also expand with some great features.

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Dredge Yard took part in the 4th International Forum of Dredging Companies

Dredge Yard took part in the 4th International Forum of Dredging Companies. Media group PortNews organized the forum in association with FSUE Rosmorport and the International Association of Dredging Companies (IADC). They hosted the forum on the 15th of February 2017, in Moscow, in the Radisson Royal Hotel. The historical buildings along the Moskva river surrounded the hotel and therefore making it a very scenic location.

Global conversation at the International Forum of Dredging Companies

Authorities from around the world gathered at the International Forum of Dredging Companies to discuss subjects as for example the state of planning of dredging in the ports of the Russian Federation. The forum was furthermore about dredging fleet constructions and the implementation of state support measures in terms of construction. We also discussed the implementation of dredging in Russia for 2017 and the new technologies in global dredging.

Cooperation with Russia

Alexey Shifman, Basel Yousef and Judith de Rooij represented Dredge Yard. They gave a presentation about the company presenting our products, services and latest projects. Their presentation focused most of all on a possible cooperation with Russian companies.

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Dredge Yard sponsors IV International Forum of Dredging Companies

Dredge Yard sponsors the IV International Forum of Dredging Companies in Moscow, Russia. The Forum is held on the 15th of February 2017. Media group PortNews organized it in association with FSUE Rosmorport and the International Association of Dredging Companies (IADC).

Latest technologies

The Forum program is dedicated most of all to the latest technologies in dredging and marine engineering. The speakers and delegates will first of all discuss underwater operations. Other subjects are fleet and equipment involved. Especially relevant are their examples of real projects.

Dredge Yard’s representatives

Basel Yousef, Alexey Shifman and Judith de Rooij represent Dredge Yard at the Forum. There they will give a presentation about Dredge Yards new growth model. They developed this model especially for their clients based on their experience and knowledge. During the forum, Dredge Yard provides information about their products and the possibilities of working together. In conclusion: Dredge Yard looks to the future and develops a new way of cooperation.

 

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Euro Dredger 450 now available

The Euro Dredger 450, a Cutter Suction Dredger with a discharge pipe diameter of 450mm built in the Netherlands, has been successfully launched and is now available for delivery.

The Euro Dredger 450 is the first Cutter Suction Dredger resulting from the partnership between Dredge Yard and Neptune Shipyards in The Netherlands. Both companies joined forces to enable the building of this multi-purpose Cutter Suction Dredger that is suitable for dredging, soft and medium compacted sand and other sediments up to a dredging depth of 10 m on inland waters, rivers and lakes.

Specifications of the Euro Dredger 450

The Euro Dredger 450 has a total installed power of 866 kW. It consists of 3 dismountable pontoons fixed by a rigid coupling system inside the pontoon. It is designed to be disassembled easily and to be transportable by road.

The high performance dredge pump – entirely developed and manufactured by Dredge Yard – is mounted directly onto the gearbox to save space and reduce the weight, and it is driven directly by a 634 kW diesel engine. A hydraulic power pack of 232 kW is fitted on the main pontoon to supply hydraulic power to the cutter head, winches and spud hoist cylinders.

The hydraulically driven cutter head – developed by Dredge Yard – has exchangeable cutter teeth that come in three types: pick points, narrow and wide chisels. The blades of the cutter head are double curved to allow for a smooth mixture flow through the cutter and into the suction mouth.

The Euro Dredger 450 is the latest addition to Dredge Yards and Neptune Shipyards product range and the companies are already planning the development of their next multi-purpose Euro Dredger.

 

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Dredge Yard in Europort Exhibition 2015

Dredge Yard attended the Europort Exhibition 2015 in Rotterdam to present its range of dredging and mining equipment and components. Our team took part in discussions about developments of the dredge and mining products. We showcased scaled models of our cutter suction dredgers. Visitors of our exhibition booth could also look at product samples of our dredge cutter head and dredge ball joint.

Our showcase at the Europort Exhibition 2015

This year in Europort exhibition 2015, Dredge Yard introduced two new models of dredgers. The first one is the Sediment Dredger, also known as an Auger Dredger. Dredge Yard engineered and manufactured this dredger for a desalination plan from the Gulf region.

The second one is the CSD450, a versatile cutter dredger with a discharge pipe diameter of 450 mm. The CSD450 is very easy to maintain and on top of that it is affordable and reliable. Dredge Yard plans on building the CSD450 in stock in The Netherlands to reduce delivery times to a minimum.

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Dredge Yard delivers the Auger dredger

Dredge Yard has engineered and manufactured a compact and economic sediment dredger, also known as Auger Dredger, which will be used for a desalination plant in the Gulf region.

This piece of equipment can be used particularly in rivers, streams, harbors, ponds, bays or artificial lakes to remove the accumulated sediments in a highly efficient and environment-friendly manner.

The sediment dredger has been designed for 9m dredging depth, with high production underwater dredge pump, 2 floating pontoons stiffened from inside, a ladder made of thick pipe and also stiffened at both ends.

Replaceable components

All the components are driven by a single heavy duty hydraulic pack which is placed outside behind the cabin.

This dredger functions as a cutter suction dredger but the cutting tool is a rotating Archimedean screw set at right angles to the suction pipe.

Dredge Yard can also offer its support in replacing the whole auger head with a new one or to replace the auger head with a cutter head.

Compact design

With its compact design, the sediment dredger can be easily transported or mobilized in separate dismounted parts inside of a container or as a complete unit on the truck by road.

Auger dredger presented at Europort 2015

Dredge Yard will also exhibit at Europort 2015 in Rotterdam presenting its range of dredging and mining equipment and components, the ongoing developments of the products, updates about the projects that Dredge Yard is working at present.

The company will also showcase scaled models of the cutter suction dredgers and also offer the realistic experience for the visitors to close examine product samples of our dredge cutter head and dredge ball joint.

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Developing the largest size dredge pump in dredging industry

As the demand for larger dredgers rises, there is a growing need for developing largest size dredge pump that can reach up to 1,800 mm suction diameter.

The largest size dredge pump is one of the main components of the dredger, and it is critical to achieving production. Dredge pumps also have the biggest power consumer during operation so efforts to reduce the pump’s power needs through smarter design are critical.

Engineering challenges of dredge pumps

Dredge pumps involve more complex engineering challenge than water pumps. They must carry water filled with mixture of several types of soils like mud, fine sand, coarse sand, gravel, stones, and other debris. The mixture of those materials with pumped water doesn’t behave as homogenous fluid as the soil tends to settle down and slide on the pipe bed depending on the flow speed. Another challenge is that pump parts wear quickly. Clogged impellers and breaking vanes also pose risks to pump performance.

Dredge Yard’s largest size dredge pump design

In 2011, Dredge Yard began developing a new range of dredge pumps ranging from 200mm to 1,400mm – the largest size dredge pumps in the dredging industry. These pumps are designed to counter wear problems inherent in dredge pumps. Impellers are designed in multiple categories of 3, 4 and 5 vanes. To resist wear, the pump parts are made from high chromium iron having a hardness of 60HRC. Unfortunately these materials don’t have high elongation properties and are not impact resistant. For this reason, some dredge pumps are built with an outer casing.

The large pumps are connected in series, reaching a final pressure of 30 bar by the 3rd pump. The pumps often weight more than 100 tons for one complete assembly including wet parts, outer casing, plates, shaft, bearing assembly and pedestal.

Size, weight and component resistance, among other factors, create an imposing challenge for dredge pump designers. Demand has recently grown in the market for even bigger dredgers. Dredge pump size must increase from 1,400 mm to 1,600 mm – even 1,800 mm. Larger suction pipes and dredge pumps must be designed to fill the dredgers in less than 2 hours.

New design methods are needed to adapt to the market efficiently. Pumps must be tested and analyzed for their efficiency and performance. Foundries with casting capacity of 50 tons and heavy steel machinery 6 meters in diameter are required when casting and machining the pump case.

Performance analysis of the largest size dredge pump

The size of these dredger pumps makes building a test and analysis laboratory extremely difficult if not impossible. The manufacturer must design and manufacture the pump as a prototype and deliver the prototype to the dredger without testing and performance checks. All performance will be tested in the dredger when it starts working. The design has to be flawless, performance oriented and reliable before its production. Engineers at Dredge Yard test dredge pump performance with computational fluid dynamics (CFD) instead of physical testing. CFD software calculates and simulates the pump performance measurements like flow rate, aeration, cavitation, pumping head, efficiency, power required, and net positive suction head (NPSH).

CFD codes, can provide steady-state simulation, also known as multi-frame reference (MRF) simulation or “frozen blade” simulation, which put the impeller in a reference frame that rotates at the pump speed, while solving for the rest of the pump in the stationary lab frame.

3-D modeling

After achieving the hydraulic design, a basic 3-D pump model is made in several CAD programs. Once the basic design is completed Dredge Yard runs several trials on major FEA calculations on the model to ensure getting the right stiffness and strength of the pump. This model incorporates pressures output from the CFD analysis to determine the wall loadings.

The gap between the impeller and front plate must be tightly controlled in terms of geometric tolerance. If deformation widens the gap, efficiency will drop significantly. The 3-D modeling and FEA process is repeated as needed to ensure the highest safety margin and lowest weight. At 1,800 mm a dredge pump weights approximately 200 tons. Any weight savings from the FEA calculation could be significant.

Design work continues on the 1,800 mm dredge pump. Dredge Yard aims to finalize the development in 2016 and build the pumps for the dredging and mining market.

One of the examples of a geometric tolerance that needs to be tightly controlled is the gap between the impeller and the front plate. If there is a deformation in that area and the gap widens, the efficiency will drop significantly. Besides the impeller gap effect, the stiffening of the pump structure will assure a symmetrical tension on the pump case and plates. As the pump case is of a volute shape and pressure is not evenly spread, deformation could be asymmetric which is not desirable in pump structures.

The 3-D models takes into account such performance measurements as flow rate, head and cavitation for many of the pump’s components.