MODELING DRAFT LOSS OF PK-24 AND TP-81 BOILERS PULVERIZED COAL SYSTEM SEPARATORS
THE PURPOSE of the article is to consider the aerodynamics of the air-and-coal mixture in centrifugal separators of different diametersin order to determine the dependences of draft loss on flow parameters. METHODS. A mathematical modeling of separator frictional loss is carried out on the basis of experimental data. The software package FlowVision HRC is used in the simulation. RESULTS. Criterial equations expressing functional dependences of the draft loss on the average hovering velocity and average diameter of particles are obtained. They demonstrate good correlation with experimental data.CONCLUSIONS. It is found that the total draft loss under the pneumatic transport upflow is the sum of the resistance of coal dust particles to friction and injection.