| 摘要 |
<p>PURPOSE:To recover efficiently liquefied gaseous SO2 by removing dust from exhaust gas contg. gaseous SO2 at high concn. after regenerating a desulfurizing agent, cooling the gas to a temp. close to room temp., drying it, and cooling the dried gas to the liquefaction temp. of gaseous SO2. CONSTITUTION:Stack gas contg. SOx is introduced into an absorption tower 1, where it is desulfurized. A desulfurizing agent contg. absorbed SOx is fed to a regeneration tower 2, where it is heated to convert the SOx into SO2, and gas contg. SO2 as starting material is introduced into a dust collector 3 to remove dust. The gas is then introduced into coolers 4, 5, where it is cooled to a temp. close to room temp., and condensed water is sprayed into stack gas from a spray nozzle 8 through a receiving tank 6. The cooled gas is pressurized with a blower 10 and introduced into a drier 11a or 11b, where it is dried to such a dew point that moisture in the gas is not condensed in a gaseous SO2 condenser 23. The dried gas is compressed with a compressor 21 and introduced into the condenser 23 through an after-cooler 22. In the condenser 23, the gas is cooled to the liquefaction temp. of gaseous SO2 to recover the gaseous SO2 in the gas as liquefied gaseous SO2.</p> |
