Apparatus for secondary dedusting of exhausted gas from shaft kiln

摘要

PURPOSE: An apparatus for secondary dedusting of exhausted gas from shaft kiln is provided which not only improves dust removing efficiency, but also removes fine dust without increase of pressure difference of venturi part. CONSTITUTION: In a secondary dedusting apparatus of shaft kiln flue gas in which dust is secondarily removed from the first dedusted flue gas after primarily removing dust from flue gas exhausted from shaft kiln in venturi scrubber(13), the secondary dedusting apparatus of shaft kiln flue gas comprises a suction part comprising a scrubber connected to the venturi scrubber, demister(22) connected to stack(20) of the scrubber, a flue gas cutout valve(40) installed on suction pipe(26) between the demister and scrubber to open and shut the flue gas, a blower(24) connected to the demister to suck in flue gas from which dust is removed in the demister, and a flux control damper(28) for controlling flux of flue gas flown in the blower; and a cleaning part comprising a header pipe(30) for distributing flue gas exhausted from the blower, spargers(32) which are connected to the header pipe, a pipe(34) for supplying cleaning solution to the spargers, a solenoid valve(42) installed on the pipe to open and shut the cleaning solution, and a cone(36) installed in front of the tip of the spargers, wherein the apparatus further comprises a control means comprising dust measuring sensor(44) and control panel(50).