Flue gas filtering device as well as ash removal method and dust removal equipment thereof

The invention provides a flue gas filtering device and a dust removal method and dust removal equipment thereof.The flue gas filtering device comprises a shell, an executing mechanism and a plurality of corresponding telescopic filter bags and bag cages, a partition plate is provided with a plurality of holes corresponding to the telescopic filter bags, the opening ends of the telescopic filter bags are fixed to the holes, and the lower ends of the bag cages are located above the tail ends of the telescopic filter bags; the tail end and the lower end of the bag cage are fixed on the moving part of the executing mechanism, and the executing mechanism can control the moving part to move up and down to drive the tail end of the telescopic filter bag and the lower end of the bag cage to move. With the adoption of the structure, when the telescopic filter bag needs to be dedusted, the executing mechanism can control the moving part to move up and down to drive the telescopic filter bag to integrally shake up and d