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Chemical Technology • October 2016
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Contents
Chemical Technology is endorsed by The South African Institution of Chemical EngineersTransparency You Can See
Average circulation
(Q2 Apr – Jun 2016)
3 621
and the Southern African Association of Energy Efficiency DISCLAIMER The views expressed int
his journal are not neces- sarily those of the editor or the publisher. Generic images courtesy of www.123rf.com18
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http://www.chemicaltechnologymagazine.co.za
REGULAR FEATURES 2 Cover story 4 Comment 28 Et cetera 30 Spotlight on SAIChE IChemE/SAIChE IChemE News 32 Sudoku No 120 and solution to No 119 PUMPS AND VALVES 5 Coal, pump design and smart maintenance The complexity of a coal preparation plant varies according to the nature of the raw material, the requirements for the end product and the local regulations around water use and waste production. Information provided by Weir Minerals Africa 8 Focus on pumps and valves WASTE MANAGEMENT 10 Treatment of radioactive gaseous waste This article focuses on the treatment of radioactive gaseous waste streams arising from the operations in fuel fabrication facilities, nuclear power plants, fuel reprocessing facilities and waste processing facilities. IAEA document edited by Carl Schonborn, Pr Eng 14 Focus on waste management PLANT MAINTENANCE 18 Pressure relief device monitoring: How to detect releases, leaking and fugitive emissions Every country has regulations to protect industrial plants and facilities against overpressure in various processes and operations. In the US, the American National Standards Institute (ANSI), the American Society of Mechanical Engineers (ASME) and the American Petroleum Institute (API) provide detailed information on best practices for overpressure protection. Information provided by Emerson Process 22 Focus on plant maintenance INNOVATION 26 • Using nature’s own solvents for the preparation of pure lignin • Innovative passively cooled instrumentation shelters • Flash of brilliance: CALIPSO satellite marks ‘First Light’ • New class of fuel cells offer increased flexibility, lower cost