MATERIAL HANDLING SYSTEMS

BELT CONVEYORS:

A belt conveyor was designed and manufactured by DMMAS to satisfy the requirements of SPDC; The Sokhna Port Development Company. There has been a need to transfer urea fertilizer along a 200-meter distance extending from an on-shore store to ships. Carried out as a turn-key project, design and manufacturing activities took place in 2001. The belt conveyor is now working around the clock at a transfer capacity of 500 tons per hour.

COMPONENTS & WORK MECHANISM:

The conveyor is provided with two seven-cubic-meter-capacity hoppers that can be moved on rails along the store. Each hopper is provided with a hand brake and two 60-cubic-meter-capacity self-cleaning bag filters. Compressed air is provided to hoppers through a 22-KW screw-type air compressor. Stored Urea is fed to hoppers, loaded to conveyor, transferred along the conveyor and then loaded aboard ships. A continuous weighing system with 0.25% accuracy measures loading rates, quantities loaded per shift and the total loaded quantity. Power is provided through a 1500-RPM 30-KW electric motor. Speed is reduced at a ratio of 19.6 through a gearbox with a hydraulic coupling. A one-meter-wide belt moves at a speed of 2.45 m/s. The conveyor is 202 meters long. Troughing angle is 30 degrees.

CONVEYOR SAFETY:

Safety is guaranteed through:

• belt-centering switches
• Line safety switches
• emergency push buttons
• a tail-drum under-speed rotation sensor
• a take-up belt-tensioning switch
• motor overheating PLC's
• hydraulic coupling overheating switch