Mist removal across drying and absorption duties
Acid carry-over can contribute to downstream corrosion, product loss and stack emissions. EVERFIBRE elements collect acid droplets, with fibre type, bed depth, packing density and drainage arranged to suit the application.
Selection considers gas flow, acid concentration, temperature, inlet mist loading, droplet-size distribution, allowable pressure drop and the required outlet acid-mist level. Drying tower, IAT and FAT duties are assessed individually rather than assigned a fixed media or performance specification.
Engineering support can include element selection, assessment of existing installations and replacement arrangements, with the scope agreed to suit project requirements.
Selected sulphuric acid plant applications
Drying Tower (DT)
Removal of moisture from process air or gas using concentrated sulphuric acid. EVERMESH mesh pads or EVERFIBRE fibre-bed mist eliminators limit acid carry-over at the tower outlet, selected according to droplet size, acid concentration, temperature, gas flow and required collection efficiency.
- EVERMESH mesh-pad mist eliminators
- EVERFIBRE fibre-bed mist eliminators
Inter-pass Absorption Tower (IAT/IPAT)
Absorption of sulphur trioxide between catalytic conversion stages in a double-absorption plant. Mist eliminators remove entrained acid before the gas returns to subsequent converter stages. Selection considers the droplet-size distribution, collection requirements and allowable pressure drop.
- EVERFIBRE fibre-bed mist eliminators
Final Absorption Tower (FAT)
Absorption of sulphur trioxide after the final catalytic conversion stages. Outlet mist eliminators collect acid droplets before the gas passes to downstream treatment or the stack. Fine-mist removal is designed for the specified inlet conditions and outlet acid-mist target.
- EVERFIBRE fibre-bed mist eliminators
Selection and performance
Media, screens, supports and seals are selected for the acid concentration, temperature and contaminants, with outlet acid-mist and pressure-drop requirements agreed for the project.
Process performance guarantees can be offered for selected applications, subject to agreed feed characteristics, operating conditions, and performance criteria. Acid-mist removal is distinct from gaseous sulphur dioxide control.
Other separation equipment
EVERPACK packings and EVERGREEN column internals can be evaluated for associated absorption and scrubbing duties, with materials selected for the operating conditions.
Product range