Selection of sulfur trioxide absorption exhaust fan
Thread Content
In the storage tank for fuming sulfuric acid, the sulfur trioxide that precipitates emerges from the tank and is absorbed by an absorption system. The main principle of the absorption system is: water is circulated using a pump, and sulfur trioxide is absorbed by atomization through nozzles; an induced draft fan is installed behind the absorption tower. The pump uses a fluoropolymer alloy, so there is no problem. Gum-lined fans were selected; after 6 months of use, the gum lining peeled off and the fan experienced extremely high vibration. I would like to ask which type of fan can ensure a operational life of at least one year?
There is a relatively high level of acid mist; it’s not known what the temperature and air flow rate are. A centrifugal blower (with stainless steel impellers) can be used.
In storage tanks at normal pressure and temperature, the heat transferred to the fan comes mainly from the heat generated during the absorption of SO3; the air flow rate is 1000 m3, and the concentration of acid mist depends on the efficiency of absorption.
Using 98% acid is the best option; using water will definitely result in acid mist.