INTERACTIONS AMONG PRESSURE, ELECTROSTATICS AND PARTICLE ENTRAINMENT IN GAS-SOLID FLUIDIZED BEDS
The effect of operating pressure on the particle entrainment and electrostatic charges in a fluidized bed of binary mixtures of glass beads was investigated in a column of 150 mm inner diameter and 2 m height.The degree of electrification in the bed is measured by four collision ball probes (stainless steel, 5.3 mm O.D.), at different levels and directly connected to electrometers.The charge density of entrained particles in the freeboard was measured by a freeboard sampler constructed as a Faraday cup.An instrumented stainless pipe (ID=38.1 mm, L=400 mm) coated with Ni is installed in the reactor exit line to measure the electrical current transferred from entrained fine particles to the metal pipe from collisions.The results showed that particle entrainment flux and electrostatic charges increased as the pressure increased from 207 to 517 kPa, probably due to an increase in bubble velocity, frequency and drag forces.
Turki Alsmari John Grace Xiaotao Bi
Department of Chemical and Biological Engineering,University of British Columbia,Vancouver,Canada V6T 1Z3
国际会议
The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)
北京
英文
175-180
2014-05-14（万方平台首次上网日期，不代表论文的发表时间）