Colloid and surface interaction understanding in warm lime softening of SAGD produced water treatment

SAGD 采出水处理中温石灰软化中胶体和表面相互作用的理解

• 批准号: 522295-2017
• 负责人: Lu, Qingye
• 金额: $ 1.82万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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=640578
• 关键词: Colloid; surface; interaction; understanding; warm

Suncor uses both surface mining and steam-assisted gravity drainage (SAGD) to recover bitumen. In SAGDoperations, almost all the steam injected is recovered as produced water at the surface. It is highly desirable torecycle the maximum possible amount of water of SAGD process to reduce operational costs and overall waterconsumption. The percentage of produced water recycled depends on the performance of the chemicaltreatment process consisting of a warm lime softening unit, an After Filter, and a weak acid cation exchangeunit. The chemical treatment of SAGD produced water is a complicated process with a lot of factorsinfluencing its performance. A wide range of colloid and interface science related phenomena are involved inSAGD produced water chemical treatment and need to be fundamentally understood. The basic understandingof these phenomena will lead to improved practice of SAGD produced water treatment. A series of jar testswill be carried out in synthetic waters to evaluate the impact of chemicals including type and dosage on thecoagulation of CaCO3 and Mg(OH)2 particles as well as total suspended solids (TSS) and total organic carbon(TOC) removal. By comparing the water characterization data of the synthetic waters before and aftertreatment, correlations will be constructed to correlate the performance of CaCO3 and Mg(OH)2 coagulationand TSS/TOC removal to chemicals species and dosage. The information obtained will be used to elucidate thecoagulation and removal mechanisms. Basic questions like how coagulant interacts with the feed TSS/TOC ofthe synthetic waters as well as formed CaCO3 and Mg(OH)2 particles will be answered.

Suncor使用表面采矿和蒸汽辅助重力排水（SAGD）来恢复沥青。在矢状作用中，几乎所有注入的蒸汽被回收为表面产生的水。高度理想的曲奇是降低运营成本和整体水力消耗的最大可能的SAGD工艺水量。产生的水回收的百分比取决于化学处理过程的性能，该化学处理过程由温暖的石灰软化单元，后过滤器和弱酸阳离子ExchangeUnit组成。产生的脱水的化学处理是一个复杂的过程，其中许多因素使其性能。各种各样的胶体和界面科学与科学现象都涉及Issagd产生的水化学处理，需要从根本上了解。这些现象的基本理解将导致改进的脱落实践产生水处理。在合成水域中进行一系列的JAR测试设备，以评估包括类型和剂​​量对CACO3和MG（OH）2颗粒以及总悬浮固体（TSS）和总有机碳（TOC）的影响的化学物质的影响。通过比较治疗前后合成水的水表征数据，将构建相关性，以将CACO3和MG（OH）2凝结和TSS/TOC去除与化学物种和剂量的性能相关联。所获得的信息将用于阐明凝集和去除机制。将回答基本问题，例如如何与合成水的饲料TSS/TOC相互作用，以及形成的Caco3和Mg（OH）2颗粒。