All are valued in the industry for their heavy-duty construction and high efficiency and can be found in operation all over the world. The six-model range extends up to the DOP 450L, which can move 4,000 cubic meters an hour via a 450mm pipe. The exchange between the heads can be done swiftly due to the practical identical mounting flange. The DOP150 was delivered with both a jet water-assisted sand production head to be used in free-flowing sand, and a cutter unit to be used in compacted sand. The DOP150 is the smallest in Damen’s range of submersible dredge pumps with an hourly capacity of 600 cubic meters of mixture. Due to begin operations in January 2020, it will be the largest gas-fired power plant in the region. A floating storage and regasification unit (FSRU) positioned 6.5 kilometers offshore will receive the LNG from tankers and supply gas to the plant via a submarine pipeline. The Porto de Sergipe I power plant is a 1,516 MW combined cycle, natural gas-fired design located in the state of Sergipe in the north-east of Brazil. An additional factor is its low assembly weight. This particular model of Damen submersible dredge pump was selected due both to its ability to run off the excavator’s hydraulic power plant and the ease and speed with which the sand mining head can be exchanged for the cutter unit when the density of the material requires it to be broken up. Concrete walls are being added to the access channel as the work proceeds to protect the piping. The dredge pump is mounted on the boom of a 30-metric-ton excavator, itself mounted on tracks running along a pier. Cables and other obstructions in the area also need to be worked around. Working in such a dynamic marine environment presents challenges when it comes to delivering the flat, even surface required for the pipeline. The Damen DOP150 is being used to extract sand in the surf zone, varying in density from loose to medium fine. Over the course of the project the DOP150 is expected to remove around 30,000 cubic meters of material. The Damen DOP150 dredge pump is now in operation, creating the access channel for a critical pipeline for the plant’s cooling system and when completed it will extend 600 meters out into the sea. Brazilian civil engineering contractor has taken delivery of a new submersible dredge pump for creating an access channel into the sea for a new power plant currently under construction.
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