Demisters failure

When a demister plugs, it increases the pressure drop of the vapor. But, the pressure drop cannot increase a lot, because the demister will break. Demister failure creates two problems ... 

IPAT acid pump failure Loss of add production Exposure of demister candles to high temperatmre gases Audio-visual alarm to be activated... 

Refractory lining failure Acid piping and cooler leakages Corrosion of demister pads/failure of candle demisters Heat exchanger tube leakages Loss of catalyst activity... 

A section of the demister pad has become dislodged. A pressure drop survey showing a substantial decrease in AP across the demister is evidence of such a failure. 

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