粉煤灰摩擦电选脱炭的电场设计研究

Research on the Electric Field Design of Fly Ash Triboelectrostatic Decarbonization

粉煤灰脱炭是资源转化再利用的技术前提,摩擦电选技术在粉煤灰脱炭领域具有较强的技术优势和良好的应用前景。基于材料功函数差异和碰撞概率模型开展了摩擦器的材料选用和结构设计,在明确带电颗粒受力作用的基础上,通过分析平行电极板高压静电场结构特征及其对粉煤灰颗粒分选的影响,提出基于带电颗粒运动特征的高压静电场设计方法。在掌握粉煤灰样品基本特征的基础上,通过带电粉煤灰颗粒受力分析与计算,建立了极限喷射位置进入高压静电场的带电颗粒运动模型,求解后确定了高压静电场结构参数的合理设计范围,对粉煤灰电选脱炭的工程设计与实践具有指导意义。

Decarbonization of fly ash is the technical premise for resource conversion and reuse process. Triboelectrostatic technology has obvious technical advantages and good application prospects for the field of fly ash decarbonization. The material selection and structure design of tribo-device were conducted based on the difference of work function and the collision probability model. On the basis of defining the force action of charged particles, the structure characteristics of high-voltage electrostatic field at parallel electrode plate and its influence on the separation of fly ash particles were analyzed. A high-voltage electrostatic field design method was proposed based on the moving characteristics of charged particles. Based on the basic characteristics of fly ash samples, the force analysis and calculation of the charged fly ash particles were carried out. Then the charged particles moving model was established while entering the high-voltage electrostatic field from the limit injection position. After solving the parameters, the reasonable range of structural parameters for the high-voltage electrostatic field was determined. It provided a guiding significance for the engineering design and practice of fly ash triboelectrostatic decarbonization.