不同液体介质下小型气力提升泵水力特性分析  

Analysis of hydraulic characteristics of small air lift pump with different liquids

作　　者：左娟莉[1] 杨泓 魏炳乾[1] 张凯[1] 吴霜 ZUO Juanli;YANG Hong;WEI Bingqian;ZHANG Kai;WU Shuang(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《西安理工大学学报》2020年第3期376-382,共7页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(11605136);陕西省自然科学基础研究计划资助项目(2019JLZ-16)。

摘　　要：污水处理、深井采油、核能领域采用气力提升技术具有显著优势。为深入研究液体介质密度对气力提升泵性能的影响规律,本文基于Fluent软件采用欧拉模型、标准k-ε湍流模型数值模拟空气-水、空气-水银、空气-煤油三种小型气力提升泵内气液两相流动及其水力特性,并将空气-水气力提升泵的计算结果与其实验数据进行对比验证。研究结果表明:①提升管内总压降随充气量的增加而单调递减;相同气流量下,液体介质密度越大,提升管进出口压降越大;②气力提升泵提升液体流量随着气体注入流量的增大先快速增多,后增加缓慢;相同气流量下,液体介质密度越大,其提升液体流量越大;③随着气流量的增加,提升效率先增加后降低;相同气流量下,液体介质密度越大,其提升效率越大。本文研究成果将为污水处理、深井采油、核能领域的气力提升技术的应用提供坚实理论基础。The air lift pump has a large of significant advantages in sewage treatment,deep well oil recovery and nuclear energy field.At present,the influence of liquid medium density on air lift pump is not much discussed.Therefore,in this paper,based on Fluent software,the Euler model and standard k-εmodel,the hydraulic characteristics of small air-water,air-mercury,air-kerosene lift pumps are simulated,with the calculation results of air-water pump verified with its experimental data.The results show that:①The total pressure drop decreases monotonously with the increase of flow rate of injected air.At the same gas flow rate,the greater the difference in density,the easier the gas rises and the greater the total pressure drop.②The flow rate of liquid in the riser pipe increases with the increase of the gas injection flow rate rapidly,and then increases slowly.At the same gas flow rate,the flow rate of liquid increases with the increase of the medium density.③With the increase of air flow rate,the lifting efficiency increases significantly and then decreases.At the same gas flow rate,the lifting efficiency increases with the increase of medium density.These researches provide a solid theoretical basis for sewage treatment,deep well oil recovery and nuclear energy field.

关 键 词：气力提升系统 数值模拟 密度 提升效率 

分 类 号：TK72[动力工程及工程热物理—流体机械及工程]