Heat recovery device of titanium dioxide calcining kiln

The utility model discloses a heat recovery device of a titanium dioxide calcining kiln, which comprises a flue gas collecting pipe, a filter cover and a calcining kiln feeding channel, a preheating coil pipe is embedded in the calcining kiln feeding channel, one end of the flue gas collecting pipe is fixedly welded with the filter cover, and the other end of the flue gas collecting pipe is welded with the preheating coil pipe. And an air outlet pipe communicating with the filter cover is welded to the outer surface wall of the filter cover, and the air outlet pipe communicates with one end of the preheating coil pipe through a first connecting pipe. According to the heat recovery device of the titanium dioxide calcining kiln, flue gas exhausted by the calcining kiln can be collected through the flue gas collecting pipe and then transmitted to the filter cover, impurities such as dust in the flue gas are filtered, the filtered flue gas is exhausted into the preheating coil embedded in the feeding channel of t