Effects of acid smut production on Design of industrial chimneys
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Atmospheric, mechanical and chemical kinds of attacks on industrial chimneys constructed of brickwork, concrete and steel are discussed. Acid smut production in chimneys is described. Two of the factors, widely regarded as critical, to avoid acid condensation are identified as thermal insulation and flue gas velocity. The measurements taken by several researchers studying these factors are reviewed. The conslusions of this paper suggests that the 6 mm annular air gap around the steel shell, as specified in the British Standards, may not be the optimal value.