Study of electrostatic phenomenon in gas-solid processes

在颗粒处理、运输和加工过程中，由于颗粒-颗粒、流体-颗粒和颗粒-壁接触，通过摩擦充电、摩擦起电和接触充电产生静电荷。电荷的积累导致颗粒团聚、颗粒与壁的粘附和高压电场的产生，这可能导致爆炸，因此是一个重大危险。气-固工艺，如聚合物工业中的气-固流化床反应器、石油和天然气工业中的流化催化裂化器以及药物中的压片和封装，为静电现象的发生提供了理想的环境。本研究计划将试图通过开发一种新的测量技术，研究主要的电荷产生机制和确定电荷产生控制策略，帮助更好地了解上述行业中的静电电荷产生。

Electrostatic charges are generated during particle handling, transport, and processing due to particle-particle, fluid-particle and particle-wall contacts by frictional charging, tribo-electrification and contact charging. The charge build-up results in particle agglomeration, particle-wall adhesion and generation of high-voltage electrical fields, which can cause explosions and therefore be a major hazard. Gas-solid processes such as gas-solid fluidized bed reactors in polymer industries, fluid catalytic crackers in oil and gas industries and tabletting and encapsulation in pharmaceuticals provide ideal environment for electrostatic phenomenon to occur. This research program will attempt to help to gain a better understanding of electrostatic charge generation in mentioned industries by developing a new measurement technique, studying the dominating charge generation mechanisms and determining charge generation control strategies.