Project Overview
PROJECT OBJECTIVE & REQUIREMENTS
Viva’s scope was part of a larger flue gas desulphurization project for a coal boiler in Ngodwana
• To design a 500 m3 capacity silo to store lime with a bulk density of 1700 kg/m3
• To design the silo as a fully welded structure
• Geometry to suit constraints on site due to neighbouring existing structures
ENGINEERING
• Design of the silo considered permanent loads, roof loads, material loads, wind loads as well as loads due to both
asymmetric and symmetric flow of material.
• Since the silo was to be transported and erected as one element and due to its shear size, a comprehensive lift study had to be performed.
• Some of the engineering considerations included in the lift study were:
• Selecting the most appropriate lifting methodology (in this case, tandem lift with spreader beams)
• Sizing the lifting lugs, pins, shackles, etc
• Strengthening the silo at the lifting points
• Designing steel transport saddles