RECOVERING METHOD FOR SULFUR FROM GAS CONTAINING HYDROGEN SULFIED AND SULFUR DIOXIDE AS WELL AS DUST

摘要

PURPOSE:To recover sulfur without causing catalyst deterioration and clogging due to dust by passing a gas contg. H2S and SO2 in a specified molar ratio as well as dust through a Claus reactor packed with a catalyst of metallic oxide deposited on a TiO2 carrier. CONSTITUTION:A Claus reactor 2 is packed with a honeycomb catalyst of metallic oxide deposited on a TiO2 carrier or a plurality of catalyst pipes, and a gas contg. H2S and SO2 in 2:1 molar ratio as well as dust is passed through the reactor 2 downward from a raw gas line 1 in the longitudinal direction of the catalyst. By inhibiting the dust-contg. gas from flowing across the honeycomb side wall or the tubular wall, the clogging of the porous side wall due to dust is prevented. This catalyst is not deteriorated in the catalytic performance owing to HCl and NH4SO4 in the gas. Sulfur formed by the Claus reaction is condensed with a condenser 3 and recovered from a line 4. The uncondensed gas is exhaused from a line 5.