123 Category 3: Industrial Buildings and Plants 3 Contact Corentin Dehem Address Drève Richelle 161 1410 Waterloo, Belgium Website www.dsengineers.com/fr De Smet Engineers & Contractors (DSEC) has an established reputation as agro-industrial integrator, specialising in agro-industrial fields such as sugar, edible oil, biofuels and biochemicals. It is a world class provider of engineering, procurement and construction services under a single point responsibility. DSEC has a compelling business offering, built on many years of experience that combines excellence in execution, safety, cost containment and reliability with a particular focus on energy saving initiatives and sustainability. Owner Ethiopia Sugar Corporation Architect De Smet Engineers & Contractors General Contractor OIA (India) Engineering Office De Smet Engineers & Contractors Construction Period 01/2012 - 07/2014 De Smet Engineers & Contractors has recently supplied a 13,000 T per day cane diffuser to one of the largest Ethiopian sugar mills. The De Smet TN 115C type diffuser is composed of a long metallic conveyor made of 98 articulated frames moving inside the diffuser casing and returning underneath it. Each frame is composed of ribbed perforated plates linked to a steel cylinder by means of vertical stiffeners equally distributed on the frame length. Frames inside the diffuser are loaded with a 2 m high shredded cane bed coming from milling to undergo the diffusion process. Water is added at the discharge end of the conveyor to extract the sugar by percolating through the bed before being evacuated through the perforated plates and collected in dedicated hoppers. The juice is pumped from the hoppers to the previous extraction stage and the process is repeated until it reaches a maximum sugar concentration at the feed end of the diffuser. The diffuser is 62 m long and 11 5 m wide. A model was created of the frames using 1D and 2D elements for perforated plate ribs and plates as well as shell elements for the cylinders. The major constraint to deal with was the vertical deformation: only 1/800 of the 11 5 m span was allowed so as to limit efforts at the conveyor rollers. By selecting the right thickness of the cylinder a maximal deflection of 10.1 mm was obtained. Cane Diffusion Plant - Ethiopia SE De Smet Engineers & Contractors
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