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Views: 3 Author: Site Editor Publish Time: 2021-02-26 Origin: Site
Dredging is an excavation activity in which materials are recovered from beneath the water's surface. The purpose of dredging is generally to gather bottom sediment and either dispose it at a different location or use these sediments in various products. For example, sand and gravel are used in concrete mixtures. There are many uses for dredges, all of which vary and require different types of dredging equipment. Below are some application example. Below are some application examples, with some suggestions for dredge selections.
Shandong Haijie Derdging Machinery Co.,Ltd, Specializes in hydraulic dredges. Essentially, a hydraulic dredge functions like a floating vacuum, excavating and pumping material through
a pipeline to a different location using a centrifugal pump. Hydraulic dredging is the cleanest, most precise and environmentally friendly method of dredging today.
Alternatively, mechanical dredges are used for removing debris or hardened material that is tightly compacted, using buckets to dig and transport material to different locations. Mechanical dredges do not typically retain fine materials as well as hydraulic dredges.
Cutter Suction Dredger is self-propelled or non self-propelled, portable cutter suction dredger. Hull can be dis-mantled and re-assemble easily with box structure . equipped with horizontal shifting devices, cutter ladder lifting devices, spud devices, deck crane and so on. Widely used in sand-excavating, river dredging, desilting. reclamation for channels and land, port construction,etc.
Except our standard cutter suction dredger, we also manufacture custom-made cutter suction dredger for our clients. The most remarkable characteristic with Dual-dredges pumps. Both of them are same model centrifugal pumps. The first pump is install on the cutter ladder, the second pump is install inside of the main pontoon. The sand mixture goes into the 1st pump from the suction pump, then pumped into this 2nd pump by the middle pipe, and finally discharged to floating pipeline by 2nd pump.
Advantage
dredging depth will be increased, and improve working capacity. Improve the working efficiency, enabling customers to benefit expanded.
Bucket chain dredger is non-self propelled. The pontoon adopts the assembled box structure, with excavation device, lifting device, large particle filter device, transmission device, transfer device, excavated sediment delivery to the sand transportation ship by the conveyor belt. The process including mining sand separation, stone broken, stone grading, sediment washing separation, heavy metal extraction, dehydration, transportation and so on.
Jet suction dredger through high pressure jet water column to disperse the ore body, marine engine controlled by the frequency converter drives suction pump to make a vacuum, the mixed medium is sucked into the pump then sent to the platform, fined (according to the required Dia.) into the distribution, through the distribution into the gold-election equipment. The selected concentrate is transported to the destination by transfer pump, and the waste flows through the chute to the side of the beneficiation platform. Operation room is equipped with A/C and monltor.
Wheel bucket dredger with full hydraulic control, dismantled and re-assemble easily, suitable for inland waterway dredging, ditches and reservoir dredging operation. Whole ship adopts hydraulic and centralized control system, consists of three pontoons, dismantled type cabin, equipped with anchor boom, trolley and other devices. Auto lubrication device for cutter ensure long life, independent positioning metal floating ring seal.
Vacuum Suction Dredger is used for digging out sand under water. Dredger’ s move is rely on the windlass. Middle anterior of the dredger is open base, where sand suction head extend into water. Main deck on bow was equipped with a set of lifting equipment to lift the sand suction head. Using windlass to lift or descent the sand suction head. The max. Dredging depth of this dredger is 25m. the dredger’ s structure is transverse framing and electrowelding steel structure.
Trailing suction hoper dredger is self propelled or non-self propelled. The dredging pump drives the front of screw rake head to churn, cut, and collect to the underwater suction position, and through the suction pipe to absorb the bottom silt, sand, and other loose material with water, and then through discharge pipe are driven by the dredging pump to discharge the slurry to the destination. During the dredger working process, in order to increase the mud suction effect, we add the jet in the front of suction pipe top to increase the mud concentration. This type of dredger is only suitable for underwater sandy and non-viscous soil, as well as soft and easily flowing mud.
