Abstract:

Equipment corrosion and fouling problems are analyzed in the utilization of geothermal energy and new technologies to inhibit geothermal corrosion and fouling are reviewed. Anti-corrosion methods include coating an anti-corrosion layer，selecting anti-corrosion materials for the equipment and pipes，increasing the corrosion allowance in the design of pipelines and other structures，injecting nitrogen or sealing off oxygen，adding sulfur（corrosion inhibitors）into the system etc. Fouling prevention techniques include adding chemical inhibitors，cleaning scale by installing fouling trapping tank or groove before geothermal utilization，imposing electric，magnetic，sound or other physical fields，coating an antiscaling layer，etc. The research directions of the corrosion and fouling prevention technologies are proposed.

摘要：

分析了地热能利用过程中存在的设备腐蚀和结垢问题，重点综述了目前为解决腐蚀和结垢问题而开发的地热防腐防垢技术。防腐技术包括：防腐涂料层、设备及管道选材上考虑采用防腐材质、设计时加大管道和其它结构件的腐蚀裕量、充氮（隔氧密封）注硫（添加防腐抑制剂，即化学药剂）技术等。防垢技术包括：添加化学阻垢剂法、诱垢载体除垢或回灌滞留槽除垢、电磁声等物理场处理法、涂层防垢等。最后指出了未来的技术研究趋势。