Pressurized filter is the filter placed in a sealed pressurized compartment, pressurized compartment filled with a certain pressure of compressed air, the suspension to be filtered by the feed pump into the filter tank, in the A pressure differential is formed between the filter disc and the steam-to-atmospheric separator, and the filtrate is discharged through the filter medium immersed in the suspension. The solid particles are collected on the filter disc to form a filter cake. With the rotation of the filter disc, After the filter cake drying precipitation, unloading to the discharge zone. Intermittent discharge from the discharge device to the atmosphere, the entire process automatically.