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Kew East, Australia

Stanmore B.,Covey Consulting
Fibre Value Chain Conference and Expo 2014: Pulp and Paper Bioenergy Bioproducts | Year: 2014

The combustion of sludges in fluidised beds is widely and successfully practised in the paper industry. The extent of burnout is good, with a high conversion of carbon. Very wet sludges have been treated with the use of natural gas as auxiliary fuel. No report of furnace degradation has been found in a literature search. Fouling is possible in the downstream heat exchangers due to the deposition of clay-derived calcium compounds, but these can be readily removed. Acid gases are absorbed at >90 % efficiency with lime. The SNCR deNOx system can be expected to give around 50 % reduction in NO emissions under typical operating conditions. The clay particles released by the paper feed tend to agglomerate into multi-micron size aggregates which are readily filtered. As trace metals are found almost exclusively on the particulates, good particulate removal, as in a fabric filter, will ensure low metal emissions. Gaseous mercury will be adsorbed at 80 to 90 % efficiency by the addition of activated carbon, which also removes PCDD/F. Two simple, empirical mathematical models are described-one for trace metal emissions from a furnace, and the other for PCDD/F formation. The models are applied to two combustion applications relevant to sludge combustion. In each case the output predicts that the operation will meet standard emission limits. Source

Allender B.,Covey Consulting
Appita Annual Conference | Year: 2010

Low Cost Country Sourcing (LCCS) involves purchasing materials, products and services directly from off-shore sources at prices seemingly much cheaper than those available from manufacturers or agencies operating in your own country. Various approaches to LCCS will be discussed. All of them should recognise the trade off between best price and risk. LCCS is one of the drivers in lowering manufacturing/operating costs to remain competitive. Sourcing from countries with low cost manufacturing/services has globalised procurement efforts and changed the way not just commodities but also specialised products are purchased and used. Source

Patterson R.,Covey Consulting
Appita Annual Conference | Year: 2013

This is not a learned dissertation, but is intended to engender consideration and discussion. The paper asserts that • Paper Machines can be safe to operate. • Existing machines can be made safe at quite reasonable cost. • That there exists a perception that they are inherently unsafe. • This occurs at machine floor as well as board room level. The author was recently involved in upgrading three machines at KCA Millicent, to bring them into line with the Australian Machinery Safety Standard AS4024. To date the industry has relied heavily on training and procedural methods to provide a safe operating environment. This is so reminiscent of the general belief in the Ralph Nader period that motor cars were inherently dangerous, and that the only workable approach was to train better drivers. How much has that situation changed in 50 years? In a new machine the "difficult" areas such as the reel, winder, and roll handling, would be automated and interlock guarded. But it is still possible for an old machine to be modified to comply with the codes... The authors experience suggests that reasonable OHS risk levels (which is all that legislation demands) can be achieved at modest cost, with minimal impact on operating efficiencies. The vast majority of the required engineering additions are simple fixed guarding, applied in such a way as to allow for routine cleaning, testing, and fabric changes. Source

Vanderhoek N.,CSIRO | Allender B.,Covey Consulting | Shore D.,Covey Consulting
Appita Annual Conference | Year: 2010

The withdrawal of private and government funding for Australian Pulp and Paper R&D has been an unfortunate work in progress since the 1990s, and is now all but complete. Although Australian R&D has never had the allure of a new technology bubble, historically it has punched above its weight on a global scale. But with the globalisation and commoditisation of the pulp and paper industry, there is now little or no perceived value from home grown research. We celebrate the proud R&D record, and identify reasons for its demise. This has important implications for the future of the Australian Pulp and Paper Industry, not all of them disastrous, but certainly things have to be done differently. Source

Patterson R.,Covey Consulting | Covey G.,Covey Consulting
Fibre Value Chain Conference and Expo 2014: Pulp and Paper Bioenergy Bioproducts | Year: 2014

This paper discusses the use of unusual safety devices for the prevention of failure in "vessels", which may include enclosures, duct or pipework, or various occupied or unoccupied spaces. This mode of failure being due to internal pressure or vacuum conditions. Australian and other widely used Codes of Practice are primarily concerned with pressure vessels subject to statuary regulation, and it not the intention of this paper to address these issues. However as practicing engineers we quite often encounter pressure safety situations which are not directly covered by these Codes. Common examples are the use of liquid seal pots, enclosure vents, and vacuum stability measures. Examples are given, together with suggested design methodology. Source

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