- 规格:
- 10cm*20cm
中国煤炭地质总局水文地质局中深层地热能“取热不取水”技术成果新闻发布会在邯郸召开。 通迅员陈雁摄,从中国煤炭地质总局水文地质局在邯郸召开的新闻发布会获悉,该局在河北工程大学新校区完成了U型对接井换热试验研究,中深层地热“取热不取水”技术成果取得重大突破,为破解地热能供暖抽取地下水难题提供了解决方案。 据介绍,中国煤炭地质总局水文地质局利用复杂的定向钻探与精准对接工艺,首次成功钻探了垂直深度2500m、水平距离684m的大型对接井,实现总换热长度5684m。该地热井采用金属套管全封闭,利用外部水流介质循环获取岩层地热能,成功解决了砂岩回灌难题,实现了“取热不取水”,成为地热资源可持续发展探索的新方向。 通过换热试验,实际获取U型对接井循环水流量80m3/h、进水温度10℃、出水温度25℃、温差15℃、单井换热量1000kw,能够为4万平米建筑物供暖提供清洁热源,与燃煤锅炉相比,可有效减少二氧化碳、氮氧化合物、二氧化硫、粉尘排放,具有显著的环境效益。在地热井施工和换热系统建立过程中,对地热地质、定向钻探、建筑暖通等专业开展系统研究,在勘查评价、定向钻探与对接、高导热材料研究与强化换热、地温场光纤监测、地热数值模拟、热泵与地下热储合理匹配等关键技术研究上取得系列科研成果,填补了我国在中深层“取热不取水”技术研究领域的空白。
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