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01177 CASE HISTORIES ON THE USE OF NICKEL ALLOYS IN MUNICIPAL & HAZARDOUS WASTE FUELED FACILITIES

Picture for 01177 CASE HISTORIES ON THE USE OF NICKEL ALLOYS
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Product Number: 51300-01177-SG
ISBN: 01177 2001 CP
Author: D.C.Agarwal and G.K.Grossmann
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As available sites for conventional landfills have become both scarce and costly, controlled high temperature incineration is playing an increasingly important role in waste management and at the same time generating power for industry / consumer use. Proper selection of materials of construction is vital for safe and reliable operation. Depending on the chemical make-up of the waste and combustion conditions, a multitude of harmful acidic gases and deposits are produced which lead to a variety of high temperature severe corrosive environments resulting in accelerated metal wastage. The acidic gases produced during incineration of the chlorinated hazardous wastes must be scrubbed out or neutralized prior to release to the atmosphere. Typically most of the modern incineration systems consist of a high temperature incinerator chamber, a heat recovery system, a quench section to further reduce the temperature of the flue gas stream and a host of pollution control equipment to scrub acidic gases and control the particulate emissions. Hence reliability of high temperature section components and pollution control section components becomes a major concern. This paper discusses the corrosion problems with case histories where the high temperature alloy 45TM ( UNS N06045 ) and acid resistant alloy 59 ( UNS N06059 ) for the pollution control section are meeting the corrosion challenges in today's municipal and hazardous waste incinerators. Key words: Alloy 45TM, UNS N06045, halogenated waste, municipal waste, chemical waste, hazardous waste, incineration, scrubber, acid dew-point corrosion, nickel alloys, Ni-Cr-Mo alloys, Alloy 59, UNS # N06059
As available sites for conventional landfills have become both scarce and costly, controlled high temperature incineration is playing an increasingly important role in waste management and at the same time generating power for industry / consumer use. Proper selection of materials of construction is vital for safe and reliable operation. Depending on the chemical make-up of the waste and combustion conditions, a multitude of harmful acidic gases and deposits are produced which lead to a variety of high temperature severe corrosive environments resulting in accelerated metal wastage. The acidic gases produced during incineration of the chlorinated hazardous wastes must be scrubbed out or neutralized prior to release to the atmosphere. Typically most of the modern incineration systems consist of a high temperature incinerator chamber, a heat recovery system, a quench section to further reduce the temperature of the flue gas stream and a host of pollution control equipment to scrub acidic gases and control the particulate emissions. Hence reliability of high temperature section components and pollution control section components becomes a major concern. This paper discusses the corrosion problems with case histories where the high temperature alloy 45TM ( UNS N06045 ) and acid resistant alloy 59 ( UNS N06059 ) for the pollution control section are meeting the corrosion challenges in today's municipal and hazardous waste incinerators. Key words: Alloy 45TM, UNS N06045, halogenated waste, municipal waste, chemical waste, hazardous waste, incineration, scrubber, acid dew-point corrosion, nickel alloys, Ni-Cr-Mo alloys, Alloy 59, UNS # N06059
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