Patent ID: 8778297

Claim:
A sulfur recovery unit comprising: a reaction furnace configured to carry out a high-temperature Claus reaction between hydrogen-sulfide-containing gas and oxygen-containing gas introduced to the reaction furnace; a first sulfur condenser configured to cool reaction gas discharged from the reaction furnace and condense sulfur contained in the reaction gas; a reheater configured to re-heat condensed gas discharged from the first sulfur condenser; a catalytic Claus reactor configured to conduct a catalytic Claus reaction of reaction gas discharged from the reheater; a second sulfur condenser configured to cool reaction gas discharged from the catalytic Claus reactor and condense sulfur contained in the reaction gas; and a separator that allows sulfur droplets accompanying reaction gas discharged from the second sulfur condenser to collide with each other and removes the droplets thereby made larger, wherein the reaction furnace and at least one device selected from the group consisting of the reheater, the catalytic Claus reactor, the second sulfur condenser, and the separator are fixed to ground, and any device positioned between the fixed devices is disposed so as to be able to move relative to the fixed devices so that thermal stresses can be absorbed even when the temperature is increased due to a high-temperature Claus reaction or a catalytic Claus reaction.