An alternative approach to setting a mill
Kent, Geoffrey Alan (2014) An alternative approach to setting a mill. In Peacock, Steve & Ramgareeb, Sumita (Eds.) Proceedings of the 87th Annual Congress of the South African Sugar Technologists' Association, South African Sugar Technologists' Association, Pietermaritzburg, South Africa, pp. 172-181.
The conventional approach to setting a milling unit is essentially based on the desire to achieve a particular bagasse moisture content or fibre fill in each nip of the mill. This approach relies on the selection of the speed at which the mill will operate for the selected fibre rate. There is rarely any checking that the selected speed or the selected fibre fill is achieved and the same set of assumptions is generally carried over to use again in the next year.
The conventional approach largely ignores the fact that the selection of mill settings actually determines the speed at which the mill will operate. Making an adjustment with the intent of changing the performance of the mill often also changes the speed of the mill as an unintended consequence.
This paper presents an alternative approach to mill setting. The approach discussed makes use of mill feeding theory to define the relationship between fibre rate, mill speed and mill settings and uses that theory to provide an alternative means of determining the settings in some nips of the mill. Mill feeding theory shows that, as the feed work opening reduces, roll speed increases. The theory also shows that there is an optimal underfeed opening and Donnelly chute exit opening that will minimise roll speed and that the current South African guidelines appear to be well away from those optimal values.
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|Item Type:||Conference Paper|
|Keywords:||Sugar mill, Sugar mill setting, Speed, Rate, Compaction, Feeding|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > FOOD SCIENCES (090800) > Food Processing (090805)|
|Divisions:||Current > Research Centres > Centre for Tropical Crops and Biocommodities|
|Copyright Owner:||Copyright 2014 South African Sugar Technologists' Association|
|Copyright Statement:||No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical photocopying, recording or otherwise without the written permission of the copyright owner.|
|Deposited On:||21 Oct 2014 22:22|
|Last Modified:||26 Oct 2015 09:48|
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