Abstract
Abstract Low-temperature corrosion has become an important consideration and presents a real problem in the design and operation of oil-fired steam-generating units. It is caused by the presence of sulphur trioxide in the combustion gases which unites with water vapor and forms sulphuric acid on the cooler surfaces of the unit. Various ways of combating this condition are discussed, with particular emphasis on the use of dolomite as an additive. Test data and the results of actual operating experience are presented which show that additives are effective in reducing the amount of acid formed and, in some cases, practically eliminating cold-end pluggage and corrosion. The economics of their use and the design of units for higher efficiency when using additives also are discussed.
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