CAJ | 학술논문

结垢问题是地热利用过程中面临的最重要问题之一，其对地热电站优化设计和安全运行有重要影响。本文选取甘孜地区某地热井作为研究对象，对放喷期间的地热水进行水质分析，根据拉申指数（LI）和雷兹诺指数（RI）判断腐蚀结垢趋势；同时对结垢成分进行了XRD分析，并明确了结垢原因和防垢措施。研究结果表明：地热水的RI为5.58，LI为0.19，说明地热水有结垢趋势，结垢程度为中等；垢的成分为CaCO3，垢的成因为流体减压造成CO2从水中逸出导致CaCO3析出结垢；除垢方法采用化学洗井，阻垢措施推荐采用化学抑制剂。
결구문제시지열이용과정중면림적최중요문제지일，기대지열전참우화설계화안전운행유중요영향。본문선취감자지구모지열정작위연구대상，대방분기간적지열수진행수질분석，근거랍신지수（LI）화뢰자낙지수（RI）판단부식결구추세；동시대결구성분진행료XRD분석，병명학료결구원인화방구조시。연구결과표명：지열수적RI위5.58，LI위0.19，설명지열수유결구추세，결구정도위중등；구적성분위CaCO3，구적성인위류체감압조성CO2종수중일출도치CaCO3석출결구；제구방법채용화학세정，조구조시추천채용화학억제제。
Scaling is one of the most important problems in the geothermal utilization, and it has an important effect on the plant optimization design and safety operation. A well in Ganzi is selected as the study subject, whose water sample is analyzed during choke. The trend of corrosion and scaling is judged with the methods of Ryzner index (RI) and Larson index (LI), and the component of scaling is analyzed by XRD. The scaling reason and countermeasures for anti-scale are pointed out. The result shows that RI and LI is respectively 5.58 and 0.19, indicating a medium scaling degree. The component of scaling is CaCO3, whose precipitate is caused by CO2 escaping from geothermal water due to the reduction of pressure. The chemical washing well and filling inhibitor are selected as the countermeasures for anti-scale.