Downflow type semidry flue gas desulphurization dust collector

The utility model provides a downflow type semidry flue gas desulphurization dust collector, includes desulfurizing tower, automatically controlled cabinet, its characterized in that: the desulfurizing tower top is provided with the toper air inlet section of intercommunication flue gas inlet pipeline, be provided with the calcium hydrate mouth that dusts in the toper air inlet section, calcium hydrate dusts the mouth through the first rotary feeder of conveying line connection, calcium hydrate dry powder storehouse, the inlet temperature sensor is installed to toper air inlet section lateralwall, import sulfur dioxide consistency transmitter, be provided with the desulfurization circulation ash mouth that dusts on the mixing section of toper air inlet section lower part, the well upper portion of desulfurizing tower is provided with the atomizing device to tower body internal water spraying, it is provided with wen and makes up the pipe to be located tower body between atomizing device and the mixing section