The design of SO3
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What are the key design considerations for heating 30% fuming sulfuric acid with steam to produce SO3?
1. Be sure to pay attention to the material of the evaporator and its corrosion resistance. Steam is used as the heat source; once the tube bundle leaks, steam reacts rapidly with fuming sulfuric acid, causing rapid corrosion and damage to the evaporator tube bundle, which in turn significantly affects the purity of sulfur trioxide. 2. Pay attention to the steam grade used during design; the steam temperature is generally about 40 degrees higher than the evaporation temperature, and higher temperatures can accelerate the corrosion of the evaporator.