Electrocoagulation for oil-sands produced water treatment

电凝聚油砂采出水处理

• 批准号: 545148-2019
• 负责人: Roberts, Edward
• 金额: $ 9.11万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Idea to Innovation
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693374
• 关键词: Electrocoagulation; oil; sands; produced; water

The oil sands industry is facing increasing pressures due to lower oil prices and concerns about the environmental impact of oil production, especially GHG emmissions. For in-situ oil-sands production, typically steam is injected into the reservoir to reduce the viscosity and enable production. Natural gas combustion is used for steam generation, leading to higher GHG emmissions than conventional oil production. While most of the water is recycling to the steam generation, increasing recycle rates could reduce the energy (and associated GHG emmissions) requirements, as well as reduce fresh water demand, and disposal of contaminated blowdown from the boilers. In addition, the capital and operating costs for the water treatment train required to enable water recycle are high. This project will test the application of a water treatment technology, electrocoagulation, for treatment of oil-sands produced water using on-site testing with a prototype unit. The prototype will be based on the innovative technology developed at the University of Caglary, which is effective for removal of key contaminants, silica and calcium from the produced water. Removal of silica in this way will enable increased recycling of water and reduced energy consumption (and thus environmental impact) for in-situ oil-sands production. In addition, novel operating conditions were evaluated that could enhance treatment performance, reduce costs, and eliminate operational problems caused by fouling within the electrocoagulation system.

由于油价下跌以及对石油生产对环境影响（尤其是温室气体排放）的担忧，油砂行业面临着越来越大的压力。对于原位油砂生产，通常将蒸汽注入油藏以降低粘度并实现生产。天然气燃烧用于产生蒸汽，导致温室气体排放量高于传统石油生产。虽然大部分水被循环利用以产生蒸汽，但提高循环率可以减少能源（和相关的温室气体排放）需求，并减少淡水需求和锅炉受污染排污的处理。 此外，实现水循环利用的水处理系统的资本和运营成本很高。该项目将通过原型装置进行现场测试，测试电凝水处理技术在油砂采出水处理中的应用。该原型将基于卡格拉里大学开发的创新技术，该技术可有效去除采出水中的关键污染物、二氧化硅和钙。以这种方式去除二氧化硅将能够增加水的循环利用并减少原位油砂生产的能源消耗（从而减少对环境的影响）。此外，还评估了新颖的操作条件，这些条件可以提高处理性能、降低成本并消除电凝系统内结垢引起的操作问题。