| 松嫩盆地北部林甸地热田供暖尾水处理试验 |
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| 引用本文： | 李永利,于长生,姜智超,商洁,张丽华.松嫩盆地北部林甸地热田供暖尾水处理试验[J].水文地质工程地质,2021,48(1):188-194. |
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| 作者姓名： | 李永利 于长生 姜智超 商洁 张丽华 |
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| 作者单位： | 1.黑龙江省生态地质调查研究总院，黑龙江 哈尔滨 150027 |
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| 摘 要： | 将混入污染物和杂质的地热尾水直接排向地表水体，会造成水、土环境污染，也会造成水资源的浪费。为高效减少地热尾水中污染物，实现供暖地热尾水的无害化排放，以林甸县花园镇供暖地热尾水为例，通过混凝沉淀、超滤、纳滤工艺开展供暖尾水处理的室内实验和中试试验研究，连续监测获取地热尾水各处理工艺运行参数，组合工艺稳定运行期间监测到溶解性总固体浓度由5 824.7 mg/L降为432.40 mg/L、氯化物浓度由3 010.13 mg/L降为194.16 mg/L、氟化物浓度由1.57 mg/L降为0.31 mg/L、硼浓度由4.04 mg/L降为1.62 mg/L。确定该区地热尾水处理的最佳组合工艺为采用超滤运行压力为0.1 MPa，纳滤膜为陶氏NF90，操作压力为0.60 MPa，进水量为0.8 m3/h。室内实验溶解性总固体去除率90.21%～92.49%，氯化物去除率91.63%～93.02%，氟化物去除率96.81%，硼去除率55.20%～55.69%。中试试验溶解性总固体去除率为92.62%；氯化物浓度200 mg/L，氯化物去除率为92.57%；硼浓度1.77 mg/L，硼去除率为55.7%，以上实验结果均达到相关规范标准。试验证明本工艺处理松嫩盆地北部林甸地热田供暖尾水是可行的，解决了供暖尾水处理中资源浪费和尾水回收利用的技术性问题，为地热资源可持续利用提供了新的途径。
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| 关 键 词： | 松嫩盆地 林甸地热田 供暖尾水 组合工艺 水处理 阶梯利用 |
| 收稿时间： | 2020-01-04 |
An experimental study of heating tail water treatment of the Lindian geothermal fields in the Northern Songnen Basin |
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| LI Yongli,YU Changsheng,JIANG Zhichao,SHANG Jie,ZHANG LiHua.An experimental study of heating tail water treatment of the Lindian geothermal fields in the Northern Songnen Basin[J].Hydrogeology and Engineering Geology,2021,48(1):188-194. |
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| Authors: | LI Yongli YU Changsheng JIANG Zhichao SHANG Jie ZHANG LiHua |
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| Institution: | 1.Heilongjiang General Institude of Ecological Geological Survey and Research, Harbin, Heilongjiang 150027, China2.China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China |
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| Abstract: | Direct discharge of geothermal tail water mixed with pollutants and impurities to surface water bodies will cause water and soil environmental pollution and waste of water resources. In order to effectively reduce pollutants in geothermal tail water and realize the harmless discharge of geothermal tail water, this paper takes the geothermal heating tail water of the Huayuan Town in Lindian County to the south of Daqing as an example to carry out the experimental study of tail water treatment. Laboratory and pilot tests are conducted on heating tail water treatment by coagulation sedimentation, ultrafiltration and nanofiltration processes. The operating parameters of the geothermal tailwater treatment process are obtained through continuous monitoring. During the stable operation of the combined process, TDS is detected from 5824.7 mg/L to 432.40 mg/L, chloride from 3010.13 mg/L to 194.16 mg/L, fluoride from 1.57 mg/L to 0.31 mg/L, and boron from 4.04 mg/L to 1.62mg/L. The best combined process for determining the geothermal tail water treatment in this area is to use the coagulant PAC with an ultrafiltration operating pressure of 0.1 MPa. The filter membrane Dow NF90 is employed, the operating pressure is 0.60 MPa, and the inflow is 0.8 m3/h. In this study, the TDS removal rate in the laboratory experiment is between 90.21% and 92.49%, the chloride removal rate between 91.63% and 93.02%, the fluoride removal rate is 96.81%, and the boron removal rate is 55.20%?55.69%. The TDS removal rate in the pilot test is 92.62%, the product water chloride is 200 mg/L, the chloride removal rate is 92.57%, the product water boron is 1.77 mg/L, and the boron removal rate is 55.7%. The above experimental results have reached the relevant standard. The test results confirm that the process of treating tail water in the Lindian geothermal field in southern Songnen Basin is feasible. The treatment solves the technical problems of resource waste and tail water recycling in tail water treatment, and it provides a new way for geothermal resource utilization. |
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| Keywords: | Songnen Basin Lindian geothermal fields geothermal tail water combined process water treatment cascade utilization |
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