盐穴压缩空气储能系统N80注采管柱腐蚀特性研究  

Study on Corrosion Characteristics of N80 Injection-Production Pipe Column in Salt Cavern Compressed Air Energy Storage System

作　　者：张明 邢泰高 易锫 余建飞 李阳海 ZHANG Ming;XING Taigao;YI Pei;YU Jianfei;LI Yanghai(Electric Power Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430077,China;Hubei Chuyun Energy Storage Technology Co.,Ltd.,Yingcheng Hubei 432400,China)

机构地区：[1]国网湖北省电力有限公司电力科学研究院,湖北武汉430077 [2]湖北楚韵储能科技有限责任公司,湖北应城432400

出　　处：《湖北电力》2023年第1期85-90,共6页Hubei Electric Power

基　　金：湖北省重点研发计划项目(项目编号:2022BAD163)。

摘　　要：压缩空气储能系统的盐穴储气库富含天然盐粒子,并伴有H_(2)S气体从岩层渗出,给注采管柱带来了腐蚀和安全隐患。为了分析该工况下注采管柱的腐蚀特点,以期进行合理化选型及腐蚀防护,采用自制高压腐蚀仪和能谱仪,模拟了N80试样在高压富盐空气环境下的腐蚀行为,探讨了该运行工况下盐穴内的压缩空气可能对N80钢带来的影响,并用A3钢进行对比。结果表明,岩层渗出的少量H_(2)S气体并不会加剧金属材料的腐蚀;N80钢的合金元素亦可对腐蚀产生抑制效果,因此其整体腐蚀程度低于A3钢;N80钢的腐蚀主要是源于富含盐粒子的高湿卤水。当储能系统稳态运行后,空气湿度较低,此时腐蚀过程也将减缓,但Cl-的渗透作用不容忽视。Salt cavern gas storage depots in compressed air energy storage(CAES)system are rich in natural salt particles,accompanied by H_(2)S gas leaking from rock strata,which brings corrosion and safety hazards to the injection-production pipe column.In order to analyze the corrosion characteristics of the injection-production pipe column under this condition and rationalize the selection and corrosion protection,this paper uses self-made highpressure corrosion instrument and energy spectrum instrument to simulate the corrosion behavior of N80 sample under high-pressure salt-rich air environment,then discusses the possible influence of compressed air in salt caverns on N80 steel under the operating condition,and finally employs A3 steel to make a comparison.The research results are demonstrated as below:The small amount of H_(2)S gas seeping from the rock layer does not aggravate the corrosion of the metal material.Alloy elements of N80 can inhibit corrosion and its overall corrosion degree is lower than that of A3 steel.The corrosion of N80 mainly comes from the high humidity brine rich in salt particles.When the energy storage system runs in a steady state,the air humidity is low,and the corrosion process will slow down,but the infiltration effect of Cl-must not be ignored.

关 键 词：压缩空气储能 腐蚀 空气透平 盐穴 储气库 

分 类 号：TG174[金属学及工艺—金属表面处理] TK14[金属学及工艺—金属学]