流道结构对管式气液雾化混合器性能的影响  

Influences of Flow Channel Structure on Performance of Tubular Gas-Liquid Atomization Mixer

作　　者：孙欢 孔令真 陈家庆[1,2] 徐孝轩 王强强[1,2] 杨寒月[1,2] 李奇 Sun Huan;Kong Lingzhen;Chen Jiaqing;Xu Xiaoxuan;Wang Qiangqiang;Yang Hanyue;Li Qi(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology;Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil&Gas Development;Sinopec Petroleum Exploration and Production Research Institute)

机构地区：[1]北京石油化工学院机械工程学院 [2]深水油气管线关键技术与装备北京市重点实验室 [3]中国石化石油勘探开发研究院

出　　处：《石油机械》2023年第3期92-101,共10页China Petroleum Machinery

基　　金：国家自然科学基金青年科学基金项目“基于微液滴分散强化吸收传质的天然气脱水机理与特性研究”(21808015);中国石化石油勘探开发研究院资助课题。

摘　　要：管式气液雾化混合器可在有限的管式空间内将液体吸收剂雾化为微米级液滴,实现高效的气液混合,进而显著增大气液接触面积、强化气液吸收传质过程,是天然气甘醇法脱水技术由塔式向管式转变的关键设备。为提高管式气液雾化混合器内液体射流破碎和气液分散混合性能,基于初始流道结构,提出3种改进流道结构。结合试验测试和数值模拟方法,探究流道结构对管式气液雾化混合器雾化混合性能的影响规律,对比筛选出更为合理的流道结构。研究结果发现:雾化压降随气量增大而增大,随气液比增大略有减小;雾化液滴粒径随气体流量和气液比增加逐渐减小;相同工况下菱形锥+带凸台流道结构的液滴粒径最小,粒径分布集中在37~60μm,较初始流道结构的粒径减小40%以上;同时该结构的雾化液滴体积分数最高,较初始流道结构的体积分数增加5~17倍。究其原因,菱形锥结构有助于引导横向气流均匀流动,有效减少壁面黏附,起到增强液滴破碎和减小液膜厚度的作用;凸台结构有助于增强气液分散效果,降低液滴平均粒径,增加雾化液滴体积分数。所得结论可推动管式天然气甘醇法脱水技术早日实现工业应用。The tubular gas-liquid atomization mixer can atomize the liquid absorbent into micron-level droplets in a limited tubular space to achieve efficient gas-liquid mixing,thereby significantly increasing the gas-liquid contact area and enhancing the gas-liquid absorption and mass transfer process.It is the key equipment for the transformation of natural gas glycol dehydration technology from tower type to tubular type.In order to improve the liquid jet breaking and gas-liquid dispersion and mixing performance in the tubular gas-liquid atomization mixer,based on the initial flow channel structure,three different improved flow channel structures were proposed.Combining experimental testing and numerical simulation methods,the influence of the flow channel structure on the at-omization and mixing performance of the tubular gas-liquid atomization mixer was explored,and a more reasonable flow channel structure was screened out by comparison.The study found that the atomization pressure drop increases with the increase of gas flow rate,and slightly decreases with the increase of gas-liquid ratio.The particle size of atomized droplets gradually decreases with the increase of gas flow rate and gas-liquid ratio.Under the same working conditions,the droplet size of the diamond-shaped cone with a boss structure is the smallest,and the particle size distribution is concentrated at 37-60μm,which is more than 40%smaller than the particle size of the initial flow channel structure;and the atomized droplet concentration of the structure is the highest,which is 5-17 times higher than the volume concentration of the initial flow channel structure.The reason is that the diamond-shaped cone structure helps to guide the uniform flow of the lateral airflow,effectively reduces wall adhesion,and plays the role of enhancing droplet breakage and reducing the thickness of the liquid film;the boss structure helps to enhance the gasliquid dispersion effect,reduce the average droplet size and increases the concentration of atomized droplets.

关 键 词：天然气脱水 气液混合 雾化性能 流道结构 横向射流破碎 液滴粒径 高速摄像 数值模拟 

分 类 号：TE832[石油与天然气工程—油气储运工程]