High-temperature smoke dust removal device

The utility model discloses a high-temperature smoke dust removal device. The device comprises a dust hood, a purification and dust removal system and a pipeline for connecting the dust hood and the purification and dust removal system, a first control valve, a CO concentration sensor, a speed sensor, a temperature sensor and a second control valve are sequentially arranged on the pipeline in theairflow direction of the pipeline. A first gas supplementing pipe used for supplementing first protective gas is arranged on the pipeline between the CO concentration sensor and the speed sensor, a third control valve is arranged on the first gas supplementing pipe, and an expansion assembly is further arranged on the pipeline; the controller is electrically connected with the first control valve,the CO concentration sensor, the speed sensor, the temperature sensor, the second control valve and the third control valve respectively. The pipeline can be effectively prevented from being damaged,smoke dust is prevented fr