Abstract
Abstract Fouling due to the deposition of solids on sieve trays was studied in a 153 mm diameter column and a 90 mm diameter simulator. Tests were carried out with various gas-liquid-solid systems to determine the effect of the fouling mechanism on tray performance. For an air-water system containing saturated NaHCO3, fouling from crystallisation occurs due to water evaporation by dry air at the tray holes. For a CO2-water system containing K2C03 and saturated KHC03 the reaction between C02 and K2CO3 causes the precipitation of KHCO3 at the gas-liquid interface. For the air-water system containing insoluble solids, flour and Ca(OH)2, no fouling was observed for a 48 hour test period. Interesting results on tray performance were also obtained. Test results indicate that (1) trays with larger holes have higher resistance to fouling, (2) fouling does not occur when trays are operated under weeping conditions, (3) fouling rate increases with increasing gas loading, (4) a bed of mesh packing on the sieve tray ...
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