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美国Belridge油田在重油开采中,将含高TDS(总溶解固体)和高硬度的采出水经软化处理后用作蒸汽发生器给水的实例。其所采用的软化工艺是在先投加苛性钠后再以弱酸离子交换树脂处理,可使含TDS高达11000的采出水将硬度从550ppm降至1ppm以下。处理中所产生的废渣经离心脱水后用作填土物质。该法与通常采用的石灰法、两次弱酸离子交换或强酸离子交换后再以弱酸离子交换等软化处理系统相比,具有投资省、运行费用低、能部分去除硅以及无废水外排等多方面优点。文章列举了有关的设计参数和运行条件,有一定的参考价值。
US Belridge Field In heavy oil production, high TDS (Total Dissolved Solids) and hardened produced water are softened to serve as an example for steam generator feedwater. The softening process used is to add caustic soda and then treated with a weak acid ion exchange resin to reduce the hardness of produced water containing TDS up to 11000 from 550ppm to below 1ppm. Waste generated during the process is centrifuged and used as fill material. Compared with the commonly used lime method, twice weak acid ion exchange or strong acid ion exchange and weak acid ion exchange softening treatment system, this method has the advantages of investment saving, low operation cost, partial removal of silicon, Advantages. Article lists the relevant design parameters and operating conditions, there is a certain reference value.