Anti-dust-deposition device and anti-dust-deposition system for flue gas duct

The embodiment of the utility model discloses an anti-soot formation device and anti-soot formation system of flue, anti-soot formation device includes air cannon, air mother pipe and nozzle, the air cannon is fixed in the flue, the air mother pipe is placed along the corner in the flue, one end of the air mother pipe is communicated with the air cannon, and the other end of the air mother pipe is communicated with the nozzle. The nozzles are installed on the air main pipe, and the air spraying direction of the nozzles faces the corner dust deposition position in the smoke and air duct. The ash deposition prevention device comprises a U-shaped flue and ash deposition prevention devices, and the ash deposition prevention devices are arranged at the left corner ash deposition position and the right corner ash deposition position in the U-shaped flue respectively. The air cannon is used for blowing and beating accumulated dust in the flue, so that the accumulated dust in the flue can be effectively prevented or