Numerical study of particle deposition and scaling in dust exhaust of cyclone separator

[摘要] The solid particles accumulation in the dust exhaust cone area of the cyclone separator can cause the wall wear. This undoubtedly prevents the flue gas turbine from long period and safe operation. So it is important to study the mechanism how the particles deposited and scale on dust exhaust cone area of the cyclone separator. Numerical simulations of gas-solid flow field have been carried out in a single tube in the third cyclone separator. The three-dimensionally coupled computational fluid dynamic (CFD) technology and the modified Discrete Phase Model (DPM) are adopted to model the gas-solid two-phase flow. The results show that with the increase of the operating temperature and processing capacity, the particle sticking possibility near the cone area will rise. The sticking rates will decrease when the particle diameter becomes bigger.

[发布机构] College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao; 266580, China^1;College of Chemical Engineering, China University of Petroleum, Qingdao; 266580, China^2

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] Discrete phase model;Gas solid two phase flow;Operating temperature;Particle depositions;Particle diameters;Processing capacities;Safe operation;Solid particles