“双碳”背景下河北省海岛地热综合利用与关键技术研究

Research on comprehensive utilization and key technologies of island geothermal in Hebei Province under background of"Dual Carbon"

碳达峰碳中和是着力解决我国资源环境约束突出问题,是促进生态文明建设、保障能源安全高效、推动经济转型升级、引领应对气候变化的必然选择。海岛作为兼具陆域、海域特征的地貌单元,生态环境条件特殊,资源环境承载压力大。以河北省海岛地热资源为研究对象,探索了海岛深、浅层地热资源量计算方法,并对水质进行了全面分析评价,进行了浅层地热能开发利用适宜性分区,初步掌握了全省海岛地热资源赋存条件。按照“一岛一策”,对祥云岛、龙岛提出了海岛地热综合利用模式。探究了支撑海岛地热保护与利用的远程自动化监控、浅层地热能利用、地热尾水压盐、取热不取水(同层回灌、井内换热)和“地热+”多种清洁能源集成利用技术等关键技术。研究对河北省重点海岛地热科学、高效利用具有很强的现实意义,对类似砂质海岛生态型开发利用有积极借鉴意义,有助于沿海地区双碳目标的早日实现。

Carbon peaking and neutrality are efforts to address China's prominent resource and environmental constraints.They are an inevitable choice to promote ecological civilization construction,ensure energy security and efficiency,drive economic transformation and upgrading,and lead the response to climate change.As a geomorphic unit with both land and sea features,island has special ecological and environmental conditions and great pressure on resources and environment.Taking the island geothermal resources of Hebei Province as the research object,the calculation method of the deep and shallow geothermal resources of the island was explored,a comprehensive analysis and evaluation of the water quality was made,and the suitable zoning of the development and utilization of shallow geothermal energy was carried out,and the occurrence conditions of the island geothermal resources in the province was preliminarily grasped.According to"one island and one policy",the comprehensive utilization model of island geothermal on Xiangyun Island and Dragon Island was put forward.The key technologies supporting the protection and utilization of island geothermal energy were explored,such as remote automatic monitoring,shallow geothermal energy utilization,geothermal tail water pressure salt,heat extraction without water(same layer recharge,well heat transfer)and"geothermal+"integrated utilization of multiple clean energy technologies.The research has a strong practical significance for the scientific and efficient utilization of geothermal energy in key islands of Hebei Province,and has positive reference significance for the ecological development and utilization of similar sandy islands,and will certainly contribute to the early realization of the"Dual Carbon"goal in coastal areas.