摘要 |
PROBLEM TO BE SOLVED: To prevent sticking of dust by feeding gas from which mist is removed to a compressor. SOLUTION: A small amount of high temp. gas subjected to heat exchange at an outlet of a heating side of a heat exchanger 4 in the passage in which the dust in the dust-containing gas is removed with a scrubber dust removing device 6, the gas after removing the dust is pressurized with the compressor 11, and then is heated with the heat exchanger, is fed to the gas at an outlet side of the scrubber dust removing device 6, before it is fed to the compressor 11, via a recycle piping 19, and the mist in the gas is vaporized and gasified to be removed, thus the dust in the gas feeding to the compressor 11 is prevented to stick to the inside of the compressor and the compressor 11 is protected. |