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: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=549627
• 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-固工艺中，在颗粒处理、运输和加工过程中产生静电荷，从而导致颗粒-壁粘附、颗粒团聚和产生引起爆炸的高压电场。静电现象的显著负面影响已经在诸如石化的行业中被报道，在石化行业中，污染事件可能导致近100万美元/天的重大经济损失，并且在制药行业中，干粉吸入器（由患有肺病如哮喘的人使用）内的药物粉末团聚和沉积通过限制排放剂量而降低吸入器的效率。相比之下，在废物管理部门使用的固体分离过程中可以发现静电的有益应用。因此，本研究计划的总体目标是确定如何防止或消除工业聚乙烯气固流化床反应器中的静电荷，以及阐明不同气固过程中的颗粒荷电机制，如颗粒分离和制药。一个全面的实验计划将开发：a）静态控制策略，以消除和减少工业气固流化床反应器中的污垢。一个独特的定制中试工厂气固流化基础设施将用于这项研究，最近委托，能够在高达25个大气压的高压下运行，并容纳一种新型的静电荷测量技术。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）彻底理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）对干粉吸入器中的药物粉末填充进行全面研究，以提高此类装置的药物输送效率。在这个多学科的研究计划培训的研究生和本科生的参与将有助于在制药，石化和废物管理行业，对加拿大和世界经济至关重要的部门的研究的直接影响。