Corrosion in the boiler tubes of the Tuas South Incineration Plant, Singapore

Ali, Noorahmad Bin (2005) Corrosion in the boiler tubes of the Tuas South Incineration Plant, Singapore. [USQ Project] (Unpublished)

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Abstract

Incineration of refuse has evolved into a widely used, established technology with reliable modern facilities operating on a fully commercial basis in some advanced countries including Singapore. However this method for processing refuse has produces pollutants such as Carbon Monoxide (CO), Hydrochloride (HCl) and Sulphur Dioxide (SO2). Inside the incinerator, these gases could cause corrosion and tamper with the efficiency of the incinerator. The aim of this report, therefore, is to study the causes of corrosion to the incinerator, in particular, the superheater tube, and to recommend measures that could minimize the occurrence of the corrosion with a view to prolong the lifespan of the tube. The report will establish that the burning of plastics will release HCl which creates an environment that sets the stage for a continuous attack on the metal structure of the boiler. Another finding is that the presence of excess free oxygen in the furnace might affect the burning of refuse in the combustion process. This is attributed by the fact that free oxygen could react with the metal of the superheater tube to produce iron oxide (rust). The report will also outline the analysis on the causes of corrosion on a critical part of the boiler component superheater. Besides theoretical calculations, the report also reported on the experimental measurements and observations carried out, to complete the analytical component of the project. Another avenue addressed by the report is the feasibility of material replacement. The report ends with several recommendations on measures that could minimize the occurrence of the corrosion with a view to prolonging the lifespan of the superheater.


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 11 Oct 2007 00:24
Last Modified: 02 Jul 2013 22:32
Uncontrolled Keywords: boiler tubes, incineration, carbon monoxide (CO), hydrochloride (HCl), sulphur dioxide (SO2), waste water, feedwater
Fields of Research (FOR2008): 09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
URI: http://eprints.usq.edu.au/id/eprint/535

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