Industrial filter for factory building

The invention discloses an industrial filter for a factory building, which relates to the technical field of industrial filtering equipment and comprises a primary filtering device, a self-deashing bag type filtering device, a shaftless blowing humidifying device, a one-way ventilation device and a dust storage device. According to the self-dust-cleaning bag type filtering device, a self-dust-cleaning grab handle is manually pushed and pulled front and back to drive a self-dust-cleaning connecting rod to move front and back, and the self-dust-cleaning connecting rod drives a filtering bag to shake front and back, so that dust in the filtering bag is shaken off, and the self-dust-cleaning function is achieved. According to the one-way ventilation device, reverse overturning of the first opening and closing blade and the second opening and closing blade is prevented through the one-way limiting assembly, the one-way passing function of air and water is achieved, and therefore air and water backflow during self-