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Inhibitory effect of Hydrex anti-scalant on calcium scale deposition from seawater under multiple-effect distillers' conditions

机译：多效蒸馏器条件下Hydrex防垢剂对海水中钙垢沉积的抑制作用

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In this work, the inhibitory effect of a commercial anti-scalant (Veolia Hydrex(R) 9209) on the calcium minerals of carbonate, sulfate and hydrocalumite (Ca/Al) clay deposition from seawater has been investigated. Different concentration factors and anti-scalant doses were studied by analyzing the water hardness and turbidity. The inhibitory effect of the investigated anti-scalant was efficient even at lower concentrations. The percentage inhibition decreases with increasing the temperature and increases with increasing the dose/amount of the anti-scalant. The carbonate scale inhibition was >99% and 98-99% at 50 and 70^oC, respectively. The percentage inhibition of sulfate from hemihydrate was ranged from 80% to 87% for 2 and 8ppm anti-scalant at 50^oC. The inhibition of Ca/Al hydrocalumite deposition increases from 70% to 90% upon increasing the dose from 3 to 5ppm, respectively. A recommended useful dose of antiscalant for seawater is 5ppm.
机译：在这项工作中，已经研究了商业防垢剂（Veolia Hydrex9209）对从海水中沉积碳酸盐，硫酸盐和水铝钙石（Ca / Al）的钙矿物的抑制作用。通过分析水的硬度和浊度，研究了不同的浓缩因子和防垢剂剂量。所研究的防垢剂的抑制作用即使在较低的浓度下也有效。抑制百分数随温度的升高而降低，并随防垢剂的剂量/用量的增加而升高。在50℃和70℃下，碳酸盐垢的抑制作用分别＞ 99％和98-99％。在50℃下，对于2ppm和8ppm的防垢剂，来自半水合物的硫酸盐的抑制百分比范围为80％至87％。当剂量从3ppm增加到5ppm时，Ca / Al水铝钙矿沉积的抑制作用从70％增加到90％。对于海水，推荐的有用的防垢剂剂量为5ppm。

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