Boiler -flue dust removing device

The utility model discloses a boiler -flue dust removing device relates to flue dust removal technical field, including connecting at the terminal dust removal subassembly of flue collector, the dustremoval subassembly includes first dust removal case, second dust removal case, is used for to connect the connecting box of first dust removal bottom of the case portion and second dust removal bottom of the case portion, and first dust removal case, second dust removal case, connecting box three communicate just to hold jointly has water, and the water level is higher than the peak of connectingbox, the end -to -end connection of flue collector advances the lateral wall of first dust removal case, and the top intercommunication of first dust removal case has the outlet duct, be connected with the circulating pipe on the second dust removal case, the circulating pipe both ends are located second dust removal case and first dust removal incasement respectively, and the circulating pipe pierces into first dust remo