摘要
在粉煤灰摩擦电选脱炭中,针对颗粒因带电荷质比小导致分选效率不高的问题,提出了一种新的非线性电场结构;在建立非线性电场二维模型和数学模型的基础上,对带电粉煤灰颗粒的运动过程进行了数值模拟,深入研究了颗粒荷质比、入射速度、电场强度和极板最小间距等因素对粉煤灰颗粒分离行为的影响,探索了非线性电场用于74μm粉煤灰颗粒高效脱炭的可行性,获得了操作参数的合理范围,为实现粉煤灰电选高效脱炭提供了新思路。
For the fly ash decarburization through tribo electrostatic separation,a new nonlinear electric field structure is proposed to solve the problem of small charge-to-mass ratio of particle which lead to the low efficiency of separation.Through the setting up of two-dimensional and mathematical models of nonlinear electric field,the numerical simulation of the charged fly ash particles moving process is carried out. The effects of charge-to-mass ratio and incident velocity of particle,electric field strength and minimum plate spacing on the fly ash separation are studied deeply. The feasibility of nonlinear electric field used for efficient decarburization of 74 μm fly ash particles is explored, and a reasonable numeric range of operating parameters is obtained, which provides a new technical idea for efficient decarburization of fly ash.
引文
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