煤炭地下气化节流工具冲蚀磨损研究  

Erosional Wear of Throttling Tool for Underground Coal Gasification

作　　者：周兵超 王红梅[3] 王建军 赵楠 杨思齐 任相羿 Zhou Bingchao;Wang Hongmei;Wang Jianjun;Zhao Nan;Yang Siqi;Ren Xiangyi(Mechanical Engineering College,Xi'an Shiyou University;State Key Laboratory of Oil and Gas Drilling,Production and Transportation Equipment,CNPC Tubular Goods Research Institute;No.1 Gas Production Plant,PetroChina Changqing Oilfield Company;Underground Gas Storage Company,PetroChina Xinjiang Oilfield Company)

机构地区：[1]西安石油大学机械工程学院 [2]中国石油集团工程材料研究院有限公司油气钻采输送装备全国重点实验室 [3]长庆油田分公司第一采气厂 [4]中国石油新疆油田储气库有限公司

出　　处：《石油机械》2024年第8期124-131,共8页China Petroleum Machinery

基　　金：中国石油天然气集团有限公司基础性前瞻性科技项目“石油工程基础材料、基础元器件研究”(2023ZZ11);中国石油天然气集团有限公司基础研究和战略储备技术研究基金项目“煤炭地下气化超高温井下降温工具材料和结构设计研究”(2021DQ03)。

摘　　要：煤炭地下气化时,井下高温高压气体携带大直径的煤粉颗粒对节流工具造成严重的冲蚀磨损。为此,设计了双节流孔结构的井下节流工具,并结合高温冲蚀磨损试验结果对DNV(Det Norske Vertitas)冲蚀预测模型进行参数修正。开展了井下节流工具气固两相流冲蚀磨损数值模拟,研究高温条件下不同气体速度、不同颗粒质量流量及不同颗粒直径对节流工具的冲蚀磨损规律。研究结果表明:节流工具壁面冲蚀磨损区域随着气体流速的增大沿节流孔呈现环形分布;颗粒直径为5 mm,质量流量为7.5×10^(-4) kg/s,气体速度为20 m/s时,其对应的节流工具壁面冲蚀磨损速率最大。所得结论可为延长节流工具的安全服役年限、降低管线破损及爆炸的风险以及提高煤炭地下气化开采的经济性提供指导。During underground coal gasification,the downhole high-temperature and high-pressure(HTHP)gas carries large-diameter slack coal particles to cause severe erosional wear on the throttling tool.In this regard,a downhole throttling tool with dual orifice structure was designed.Combined with high-temperature erosional wear test results,parameter correction was conducted on the Det Norske Vertitas(DNV)erosion prediction model.Finally,numerical simulation of gas-solid two-phase flow erosional wear of downhole throttling tool was performed to understand the erosional wear law of throttling tool at different gas velocities,particle mass flow rates and particle diameters under high-temperature conditions.The results show that the erosional wear area on the wall of the throttling tool exhibits a ring distribution along the throttle orifice as the gas flow rate increases.When the particle diameter is 5 mm,the mass flow rate is 7.5×10^(-4) kg/s and the gas velocity is 20 m/s,the corresponding erosional wear rate of the throttling tool wall is the highest.The research conclusions have important guiding significance for extending the safe service life of throttling tools,reducing the risk of pipeline damage and explosion and improving the economic efficiency of underground coal gasification exploitation.

关 键 词：煤炭地下气化 节流工具 冲蚀磨损 数值模拟 高温 

分 类 号：TE93[石油与天然气工程—石油机械设备]