Method for imitating magnesium silicate scale formed at the geothermal power plant in Obama Hot Spring, Japan
Method for imitating magnesium silicate scale formed at the geothermal power plant in Obama Hot Spring, Japan
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DOI：
10.1016/j.geothermics.2021.102203
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发表时间：
2021-11
期刊：
影响因子：
3.9
通讯作者：
M. Morita;Ayumu Yamaguchi;Sota Koyama;Shin-ichi Motoda
中科院分区：
文献类型：
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作者：
M. Morita;Ayumu Yamaguchi;Sota Koyama;Shin-ichi Motoda
为了缩短适合地热电站的防垢技术的开发周期，有必要通过实验室试验来提高评价防垢技术的精度。因此，在这项研究中，我们研究了一种方法来模拟的硅酸镁规模的结构，沉淀在奥巴马温泉在长崎县，日本。在100 ℃的人工溶液中在不同的环境下合成硅酸镁水合物（即，二氧化碳、氮气和大气）。将合成的硅酸镁水合物溶液流到碳钢管的内表面，并评价硅酸镁的结垢倾向。其中，在二氧化碳环境下合成的样品具有与现场硅酸镁垢相似的结构，并且表现出高的结垢倾向。我们相信，研究结果是有用的，以消除差距之间的特点，现场缩放和实验室测试。
To shorten the development period of suitable anti-scaling technology for individual geothermal plants, it is necessary to improve the precision in evaluating the scaling technology through laboratory testing. Therefore, in this study we investigated a method to imitate the structure of magnesium silicate scale that has precipitated in Obama Hot Spring in Nagasaki Prefecture, Japan. Magnesium silicate hydrates were synthesized in an artificial solution at 100°C under different environments (i.e., carbon dioxide, nitrogen, and atmosphere). The synthesized solutions with magnesium silicate hydrates were flowed to the inner surface of a carbon steel pipe, and the scaling propensity of magnesium silicate was evaluated. Among the samples, the ones synthesized under the carbon dioxide environment have a similar structure with the field magnesium silicate scale and exhibited high scaling propensity. We believe that the findings are useful to eliminate the gap between the characteristics of field scaling and laboratory testing.