Investigation of Electrostatic Charging in Various Gas-Solid Processes with Applications in Petrochemical, Pharmaceutical and Waste Management Industries

各种气固过程中的静电充电研究及其在石化、制药和废物管理行业的应用

• 批准号: 342429-2013
• 负责人: Mehrani, Poupak
• 金额: $ 1.6万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=637862
• 关键词: Investigation; Electrostatic; Charging; Various; Gas

In many gas-solid processes, electrostatic charges are generated during particle handling, transport and processing in which resulting in particle-wall adhesion, particle agglomeration, and generation of high-voltage electrical fields causing explosions. The significant negative impact of electrostatic phenomenon has been reported in industries such as petrochemical where a fouling incident could result in major economic losses of nearly $1.0M/day, and pharmaceuticals where drug powder agglomeration and deposition inside dry powder inhalers (used by those who suffer from lung illnesses such as asthma) reduces the efficiency of the inhaler by limiting the emitted dose. In contrast, beneficial application of electrostatics can be found in solid separation process used in waste management sector. The overall goal of this research program is thus to determine ways to prevent or eliminate electrostatic charging in industrial polyethylene gas-solid fluidized bed reactors, as well as shed some light on particle charging mechanisms in different gas-solid processes such as those of particles separation and pharmaceuticals. A comprehensive experimental program will develop: a) Static control strategies to eliminate and reduce fouling in industrial gas-solid fluidized bed reactors. A unique custom-made pilot plant gas-solid fluidization infrastructure will be used in this study that is recently commissioned and is able to operate at high pressures of up to 25atm and houses a novel electrostatic charge measurement technique. b) A computational fluid Dynamic (CFD) model enabling the prediction of particle charging in various gas-solid processes including those of fluidized beds. c) A thorough understanding of effective charging of solids in gas-solid fluidized beds to achieve greater separation efficiencies in separation processes. d) A comprehensive study of drug powder charging in dry powder inhalers to improve drug delivery efficiency from such devices. Involvement of graduate and undergraduate students trained in this multi-disciplinary research program will assist in direct impacts of the research in pharmaceutical, petrochemical and waste management industries, sectors of vital importance to the Canadian and world economies.

在许多气固过程中，颗粒处理、运输和加工过程中会产生静电荷，从而导致颗粒壁粘附、颗粒团聚以及产生导致爆炸的高压电场。据报道，静电现象对石化等行业产生了重大负面影响，其中一次污垢事件可能导致每天近 100 万美元的重大经济损失，而在制药行业，药物粉末会在干粉吸入器内结块和沉积（患者使用该吸入器）来自肺部疾病（例如哮喘）的药物通过限制释放剂量而降低了吸入器的效率。相比之下，静电学的有益应用可以在废物管理领域使用的固体分离过程中找到。因此，该研究计划的总体目标是确定防止或消除工业聚乙烯气固流化床反应器中静电充电的方法，并阐明不同气固过程中的颗粒充电机制，例如颗粒分离过程中的颗粒充电机制。和药品。将开发一个综合实验计划： a) 消除和减少工业气固流化床反应器中结垢的静态控制策略。这项研究将使用一个独特的定制中试工厂气固流化基础设施，该基础设施最近已投入使用，能够在高达 25atm 的高压下运行，并采用新颖的静电荷测量技术。 b) 计算流体动力学 (CFD) 模型能够预测各种气固过程（包括流化床过程）中的颗粒充电。 c) 彻底了解气固流化床中固体的有效装料，以在分离过程中实现更高的分离效率。 d) 对干粉吸入器中药粉充电的综合研究，以提高此类装置的药物输送效率。接受过这一多学科研究项目培训的研究生和本科生的参与将有助于研究对制药、石化和废物管理行业产生直接影响，这些行业对加拿大和世界经济至关重要。