三锥水介旋流器的高硫煤脱硫降灰及其分选原理

Research on separation principles of desulfurization for high sulfur coal in three cone hydrocyclone

为实现高硫煤的脱硫降灰,采用三锥水介旋流器,取华恒高硫煤小于3 mm粒级的煤样进行脱硫实验,探讨三锥旋流器脱硫降灰的粒度下限,分析颗粒在三锥水介旋流器内部的运动特性,得到了颗粒径向速度与颗粒密度和粒度、所处的径向位置、颗粒的切向角速度以及颗粒轴向位置等变量的函数关系式。结果表明:三锥水介旋流器的降灰粒度下限为0.125 mm,脱除黄铁矿硫粒度下限为0.074 mm。该旋流器中产生的自生介质和前两段锥体连接处的淘析作用可以使三锥水介旋流器实现高效分选。

Aimed at realizing deashing and desulfurization of high sulfur coal,this paper is concerned with the description of the structure of three cone hydrocyclone,the exploration of the depth of deashing and desulfurization of three cone hydrocyclone,the investigation into the deashing and desulfurization of 0 ～ 3 mm size fractions of Huaheng high sulfur coal,and the analysis of the moving characteristic of particles in the three cone hydrocyclone.These steps are combined to produce the function expression involving particle radial velocity,particle size and density,particle radial and axial location,and particle tangential angular velocity.The results suggest that three cone hydrocyclone allows the deashing and desulfurization depth of 0.125 mm and 0.074 mm respectively.The formation of autogenous medium and the elutriation effect between the first two cones gives three cone hydrocyclone the ability to achieve an efficient separation.