Numerical simulation study on the performance of casing exhaust pipe cyclone

cyclone;  casing exhaust pipe;  computational fluid dynamics;  flow field;  dust content;  Pressure drop

The performance of the new casing exhaust pipe cyclone was studied by CFD technology. In the study of two-phase flow, a random orbital model with interphase coupling is adopted. The results show that the static pressure distribution of the flow field of the new cyclone is more conducive to preventing the backmixing of the air flow in the ash hopper than the static pressure distribution of the ordinary type flow field. Two kinds of purified gas with different dust content can be discharged, the dust content of the purified gas discharged from the inner exhaust pipe is lower than that of the outer exhaust pipe, and decreases with the decrease of the diameter of the inner pipe, and the total pressure drop of the inner exhaust pipe is larger than that of the outer exhaust pipe, and gradually decreases with the increase of the diameter of the inner pipe; By changing the diameter of the inner exhaust pipe, the dust content of the gas discharged from the inner exhaust pipe can be controlled, which is convenient for subsequent grading treatment.