固态流化双射流开采天然气水合物颗粒回收  

Recovery of Gas Hydrate Particles with Double Jet Extraction in Solid Fluidization Exploitation

作　　者：钟林[1,2] 张文超 王国荣[1,2] 张林锋 王党飞 余兴勇 ZHONG Lin;ZHANG Wen-chao;WANG Guo-rong;ZHANG Lin-feng;WANG Dang-fei;YU Xing-yong(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;Energy Equipment Institute,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南石油大学能源装备研究院,成都610500

出　　处：《科学技术与工程》2025年第5期1878-1886,共9页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(52374011);国家重点研发计划(2019YFC0312305);四川省科技厅自然科学基金创新研究群体项目(2023NSFSC1980)。

摘　　要：固体流态化开采作为一种创新性天然气水合物开采新方法,其中水合物颗粒回收决定了该方法的开采效率,是其关键技术环节之一。现有工艺中均采用单射流破碎开采,但由于其水力吸力有限,导致水合物颗粒回收率低,因此为了提高颗粒的回收性能,创新性地提出了双射流回收方案。探究了不同工作条件下的固体颗粒回收效率,同时采用数值模拟方法研究回收流场和颗粒回收率。结果表明:随着前端射流与回收孔距离(l_(1))和后端射流与回收孔的距离(l_(2))增加,双射流之间的流场效果减弱导致颗粒沉积现象愈发明显,砂堆的数量从2个转变为3个;当后端射流与回收孔的距离(l_(2))为300 mm时,随着前端射流与回收孔距离(l_(1))的增大导致颗粒回收率先增大后减小;当l_(1)=300 mm时,随着l_(2)的增大导致回收率先增大后减小。研究结果进一步丰富了水合物开采机理,有助于优化开采工具的设计。As an innovative new method of natural gas hydrate extraction,the recovery of hydrate particles determines the efficiency of this method and is one of the key technical links.However,due to the limited hydraulic suction,the recovery rate of hydrate particles is low.Therefore,in order to improve the recovery performance of hydrate particles,a double jet recovery scheme was innovatively proposed.In order to explore the efficiency of solid particle recovery under different working conditions,experimental research was carried out,and the recovery flow field and particle recovery rate were studied by numerical simulation.The results show that with the increase in the distance between the front-end jetting and the recovery hole(l_(1))and the distance between the back-end jetting and the recovery hole(l_(2)),the flow field effect between the double jets weakens,resulting in the particle deposition phenomenon becoming more obvious and the number of sand piles changing from 2 to 3.When the distance between the back-end jetting and the recovery hole(l_(2))is 300 mm,the particle recovery increases first and then decreases with the increase in the distance between the front-end jetting and the recovery hole(l_(1)).When l_(1)=300 mm,the recovery increases first and then decreases with the increase of l_(2).The results further enrich the mechanism of hydrate mining and help optimize the design of mining tools.

关 键 词：天然气水合物 固态流化 双射流 颗粒回收率 DDPM模型 

分 类 号：TE53[石油与天然气工程—油气田开发工程]