On 17 May 2011, Sappi announced its decision to convert and modernise the Sappi Ngodwana Mill in South Africa. The project (also known as Project GoCell) included the construction of a dissolving wood pulp (specialised cellulose) plant at the mill. Dissolving wood pulp was first produced in August 2013. The mill is geared to produce 210,000 tons of dissolving wood pulp per annum.
One of the most complex aspects of the construction project was the installation of a new pulp dryer, as the old drier had reached the end of its economic life. The new pulp dryer was the last piece in the puzzle to modernise and partially convert the mill.
The new dryer which dries the pulp in sheet form, ready for cutting and baling was designed and constructed by Andritz - an Austrian company that designs and supplies pulp and paper equipment to the global pulp and paper industry. It dries the pulp in one continuous sheet suspended on a cushion of hot air. The dryer is 35m long, 19m high and 12m wide, and the pulp sheet traverses the length of the dryer a total of 22 times before it finally leaves the dryer as a continuous sheet. It is then cut and baled into saleable product.
To be cost effective, the old dryer had to be deconstructed and the new dryer installed in its place inside the existing building. Under optimum conditions, this operation would normally take a minimum of 12 to 18 weeks. As the project team was faced with a deadline of only six weeks for this task, it called for extraordinary measures. After analysing their options, the team decided to construct the new dryer on its steel platform outside the building, and use a specialised modular trailer to manoeuvre the dryer into place. The same trolley was also used to remove the old dryer in one piece to enable deconstruction outside the building. The challenge was that this method had never been attempted before. Until now...and successfully too!
BIG MOVE2 (Project GoCell) | |
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| Education Magika Two Steps from Hell | Upload TimePublished on 9 Mar 2014 |
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