摘要:
地热流体是主要的地热资源之一。地热流体质量评价是地热流体开发利用的关键环节。本文利用地热水的现场测试和实验室全分析数据,对江西武功山穹窿区17处地热水进行了质量评价,主要包括理疗热矿水评价、饮用天然矿泉水评价、农业灌溉用水评价、渔业用水评价、腐蚀性及结垢趋势评价。评价结果显示,82%的地热水达到理疗热矿水标准,主要达标元素为氟和硅;18%的地热水达到天然矿泉水标准,达标成分为偏硅酸;化学组分适用于农业灌溉直接用水的地热水占82%,需经梯级利用后使尾水温度低于35℃;适用于渔业用水的地热水占76%;所有地热水均无腐蚀性和结垢趋势。以上结果可为该地区地热流体资源开发利用提供有效的参考价值。
Abstract:
Geothermal fluid is one of the main geothermal resources. Quality evaluation is vital for the exploittion and utilization of geothermal fluid. Therefore, this study evaluated the quality of 17 samples in the vault area of Wugongshan in Jiangxi province based on the corresponding criteria. The evaluation included medical geothermal water evaluation, natural mineral water evaluation, agricultural irrigation water evaluation, fishery water evaluation, corrosion and scaling trend evaluation. Results showed that 82% of samples reached the standard of medical geothermal water, and the main elements were fluorine and silicon; 18% of samples reached the standard of natural mineral water with metasilic acid. The samples suitable for agricultural irrigation accounted for 82%, and the tail water temperature should be lower than 35℃ after step utilization; samples suitable for fisheries accounted for 76%; and all samples had no corrosion and scaling tendency. Groundwater quality evaluation results showed that 6% of samples was class I, suitable for various uses; 18% of samples belongs to class Ⅲ, which is mainly suitable for centralized drinking water sources and industrial and agricultural water; 76% of samples is class IV, which can be used for drinking water after proper treatment except for agricultural and some industrial water. The results of this study can provide effective reference for the exploitation and utilization of geothermal fluid resources in this area.
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