Combination type biomass boiler flue gas purification fire retardant device

The invention discloses a combined type biomass boiler flue gas purification fire retardant device, and relates to the technical field of biomass boiler flue gas purification, the combined type biomass boiler flue gas purification fire retardant device comprises a large box body, and a first filtering chamber is formed in one side of the interior of the large box body. According to the combined type fire retardant device for flue gas purification of the biomass boiler, by adopting a multi-layer airflow distribution device, changing the airflow direction and enabling sparks to collide with airflow distribution plates, the fire extinguishing purpose is achieved, the fire extinguishing efficiency is improved, double-helix guiding is conducted on dust through a double-helix cavity, the backflow preventing effect is achieved, the good anti-blocking effect can be achieved, and the combined type fire retardant device is suitable for popularization and application. The height of dust in the dust collecting cylinder i