The invention provides a bag-type 
dust collector, which includes a box body, a pattern plate is arranged in the box body, and the box body is divided into an upper clean 
air chamber and a lower box body, the lower box body is provided with a plurality of ash hoppers, and the lower box body is provided with an air inlet  The 
bell mouth, the flower plate is provided with several filter bags, the air inlet 
bell mouth and the lower box are provided with a deflector, the deflector includes a front deflector and a rear deflector, and the front deflector has a cross section of  It is composed of semicircular guide grooves, the rear guide plate is composed of semicircular guide grooves with straight plates tangent to it on both sides, and the guide grooves of the front guide plate and the rear guide plate are divided into two parts.  The openings are all facing the direction of the air inlet 
bell mouth, and both ends of the deflector are bent along the direction of the 
flue gas and have transition arcs. By changing the structure and installation arrangement of the deflector, the 
flue gas can enter  Before the dust chamber, the large particles are subjected to inertial 
sedimentation, and it has stronger rigidity and greatly reduces the amount of deformation. It can also better realize the secondary distribution of the 
flue gas, and avoid the phenomenon of bag breaking due to excessive concentration of the 
flue gas.  .