Polyethylene Fluidized Bed Reactor Fouling Due to Electrostatic Charging

静电引起的聚乙烯流化床反应器结垢

基本信息

批准号：
535953-2018
负责人：
Mehrani, Poupak
金额：
$ 0.64万
依托单位：
University of Ottawa
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2021
资助国家：
加拿大
起止时间：
2021-01-01 至 2022-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720096
关键词：
Polyethylene Fluidized Bed Reactor Fouling

项目摘要

One major problem in gas-solid fluidized bed reactors is particle agglomeration and reactor wall fouling, which is known to be as a result of generation of electrostatic charges due to vigorous mixing of solid particles in such systems. The significant impact of this phenomenon has been reported in industries such as polymer, and oil and gas. In polyethylene gas-solid fluidized bed reactors, electrostatic adhesion due to highly charged particles results in formation of undesired polymer sheets on the reactor wall, leading to frequent process shut downs for reactor clean up, loss of production; and thus, significant economic losses. Polyethylene is used substantially in our daily lives including packaging, adhesives, toys, building and construction (e.g., wires/cables), etc. Since 2006, I have set up two fluidization laboratories at the University of Ottawa, Chemical and Biological Engineering Department that consist of two pilot plant, one atmospheric and high-pressure, fluidization systems, and have established an extensive experimental program to gain a better understanding of the reactor wall fouling in gas-solid fluidized beds with specific application in polyethylene production. My research team has been successful in developing a new and unique online electrostatic charge measurement technique that has been implemented in both fluidization systems. The focus of the proposed research is to conduct a comprehensive study of electrostatic charging mechanisms of polyethylene. Specifically the role of the catalyst particles that are pneumatically conveyed into the polyethylene reactors on the extent of charge generation and reactor fouling will be studied.

气-固流化床反应器中的一个主要问题是颗粒附聚和反应器壁结垢，已知这是由于此类系统中固体颗粒的剧烈混合而产生静电荷的结果。据报道，这种现象对聚合物、石油和天然气等行业产生了重大影响。在聚乙烯气-固流化床反应器中，高带电粒子产生的静电粘附导致反应器壁上形成不需要的聚合物片，从而导致频繁的工艺停机以进行反应器清理、生产损失；从而造成重大的经济损失。聚乙烯在我们的日常生活中大量使用，包括包装、粘合剂、玩具、建筑和施工（例如电线/电缆）等。自2006年以来，我在渥太华大学化学和生物工程系建立了两个流态化实验室，由两个中试装置组成，一个常压和高压流化系统，并建立了广泛的实验计划，以更好地了解气固流化床中反应器壁结垢及其在聚乙烯生产中的具体应用。我的研究团队成功开发了一种新的、独特的在线静电荷测量技术，该技术已在两个流化系统中实施。本研究的重点是对聚乙烯的静电充电机制进行全面研究。具体来说，将研究气动输送到聚乙烯反应器中的催化剂颗粒对电荷产生程度和反应器结垢的作用。