LIQUEFIED GAS TREATMENT SYSTEM AND CONTROL METHOD THEREFOR

This liquefied gas treatment system is provided with: a compression means (2) which compresses outside air; a pressurized combustion means (6) which comprises a furnace (3) into which the compressed outside air is led as jacket air and combustion air and in which gasified liquefied gas led from a storage tank and the combustion gas burn, and a jacket part (5) which covers the periphery of a furnace wall (4) that forms the furnace (3) and into which the jacket air is led; is led; a high pressure-side steam generation means (7, 8) which generates steam by heat exchange with the combustion gas led out of the pressurized combustion means (6); a steam turbine (9) to which the steam generated in the high pressure-side steam generation means (7, 8) is led; and a gas turbine (12) which is provided coaxially with the compression means (2) and driven by the combustion gas led from the high pressure-side steam generation means (7, 8).