Product Details

30/32 " 750mm diameter suction large hydraulic cutter suction dredger coastal dredging

Cutter Suction Dredger(CSD) is the most widely used engineering ship in dredging works and sand production. The rotary cutter head at the inlet of the suction pipe cuts and loosens the sand/mud layer to form sand-water mixture of a certain consistency. The pump uses its centrifugal force to suck the mixture and then transport it to the depository through the discharge pipe. The digging and transporting are progressing at the same time. CSD is of ideal dredging depth, long discharge distance, high efficiency and low cost.

The suction tube has at its end a hydraulically operated cutting wheel that cuts the hard sea bed into small chunks of rock and spoil. The size of the associated cutters depends on the hardness factor of the sea bed. The cutter units have a high pressure nozzle at their centre and this is used to agitate the cut spoil. The spoil is then normally lifted using an ejector system from the main pump through the suction pipe, so the hard spoil does not go through the moving parts of the pumps.

Detailed characteristic for the 30 inch cutter suction dredger

Item				Specification			Notes
Total Length				70 m			230 feet
Hull Length				48 m			157 feet
Hull Width				12			39 feet
Hull Depth				3.3 m			11 feet
Mean Draft				1.6 m			5.2 feet
Dredging Depth				12 m			39 feet
Discharge Distance				3000 m			9842 feet
Inboard Dredging Pump	Model			------
	Water Flow			8500m3/h
	Inner diameter of Suction			800 mm / 32 inch			31 inch
	Inner diameter of Discharge			750 mm / 30 inch			30 inch
	Lift head			75 m			246 feet
Main Engine			Brand	Niigata Engine			Produce (year):2000
			Model	8MG28HX			Power Pump
			Power	2427 750RPM
			Amount	1 unit
Auxiliary Engines for hydraulic system and generators			Brand	Caterpillar	Cummins	Shanghai			--------
			Model	C18 Acert	NTA855	6135D			12V280ZC/D
			Power	600 PS	250 PS	300 PS			500kw/1000rpm
			Amount	1 unit	1	1			1 unit
Harbor Engine Generator Set			Brand	Shanghai			When Parked For the whole dredger Power source
			Model	6135
			Power	75KW
			Amount	1
Cutter Head		Cutter Diameter		2560mm (8.4 feet)			High manganese steel material
		Input/Output Cutter Power		1050kw/840kw
		Cutter blade		5 Pieces			Cutter teeth replaced Easily
		Cutter Speed		0-36 RPM			International Standard
		Cutter Drivers		Hydraulic Motor
Bridge Hydraulic Winch		1 set		Rated pull force: 500KN, speed: 0~2- m/min., with 1 set full closed blocks				Electromotor Drivers
Crab Winch		2 sets		Rated pull force: 450KN, speed: 0~2- m/min., with 2 sets full closed cross blocks				Electromotor Drivers
Spud (2 sets)				Spud Diameter : 1200 mm
				Spud Length : 30m/set
Cantilever Crane				50 mt SWL: 80KNx8m Power:180kw
Operation System
Spray PaintingTechnology				3 Layer Spray Painting Prevent Corrosion
Fire Fighting Equipment				Fire extinguishers, fire hydrant
Life-saving equipment				Life jackets, life buoy, life raft
Communication Equipment				VHF, Walkie-talkie
Monitoring equipment				Remote Monitoring
Operation Room				PLC Console, Special Seat for driver and air conditioning Etc.
Other Configuration				beds for 16 seaman (Acoustic Treatment),Kitchen, Bathroom,etc.
Auxiliary equipment				Two general service pumps Two bilge pumps Fuel oil separator Two ballast pumps Three lubrication oil pumps Working air compressor Oily water separator (15 p.pm) Fire pumps Two fuel oil transfer pumps Two lubricating oil separators Two fans for engine room port side and starboard side Two daily drinking water high pressure pumps Three fresh water pumps for engine cooling Three Sea water pumps for engine cooling Two fans for pump room
Hydraulic Pump Station:				Alarm device for oil level and oil temperature in oil tank, and displayed in the controlling room; Oil drain hole and manhole in oil tank; Hydraulic pump is driven by diesel generator, while supporting pump by electricity; Control panel Swiches and movement display; Winch’s speed adjustment device System hydraulic display Hydraulic system alarm GPS navigation system VHF FM Marine Mobile Radio Navigation light equipment 220V 50HZ and 24V (double complete water tide 55c IP55)
Control Main Engines and Alarm Sysem:				- Control dredger (auto - manual) system - Steering gear control (auto - manual) system with emergency - Fire alarm system (auto -test manual)
Tanks:				a- Fuel oil tanks b- Fresh water tanks c-Lubrication oil tanks d- Ballast tanks e- Dirty oil tanks
Warranty:				12 Months from date of arrival in destination port Free spare parts listed below: Bring accessories
Shipment Time				4 months after receipt of down payment and payment guarantee.

Most CSDs are barges that are towed to the required areas and are anchored or spudded to the sea bed. Spuds are used, since the loads on the cutter at nozzle length are high and the spuds keep the vessel from moving whilst dredging. These spuds are heavy pike-like structures which can be dropped into the sea bed by the dredger.

Cutter suction dredgers are used to deepen harbour berths or channels and areas where the sea bed is harder than normal and where a suction dredger cannot lift the required spoil. The dredger literally cuts the hard materials and rock away from the sea bed and sucks it through the cutter suction pipe. This is then discharged ashore or to barges for spoil removal.

2 * 30 inch dredgers in stock now ( 2010 built ) , fast delivery , top quality .

CCS Class ( China Classification Society ) .