Abstract
Heat exchangers utilized in waste incineration facilities are subject to severe high-temperature attack by gaseous and molten species and dewpoint corrosion by aqueous condensates. Types of heat recovery systems discussed are waterwall refuse boilers, watertube and firetube boilers for industrial incinerators, and gas/gas exchangers (air preheaters) employed in sludge combustors, thermal oxidizers, and radwaste incinerators. Also covered are condensing heat exchangers and gas reheaters integrated into wet scrubbing systems. Coverage includes heat exchanger design configurations, construction materials, corrosion concerns, failure case histories, and selection criteria for heat-resistant and corrosion-resistant alloys. Alloy families reviewed comprise stainless steels (ferritic, austenitic, duplex), superaustenitic alloys, and nickel-base alloys. Tabulations are presented giving chemical compositions and mechanical properties of a wide range of generic and proprietary alloys. Also briefly reviewed are nonmetallic heat exchangers utilizing plastics, glass, graphite, and ceramics.
