摘要
为解决深海采矿过程中颗粒堵塞问题,研究了管道堵塞再启动过程。基于物理试验与理论建模方法,根据管道内颗粒群的运动特点,将堵塞再启动过程划分为不同阶段,给出各阶段管道内的平均体积浓度、局部体积浓度的判断依据,分析颗粒群堵塞高度对管道内压力、流量等影响规律,预测再启动过程中段塞流的流量和压差。试验分析结果表明:矿石堵塞再启动过程可以划分为松动跳跃、段塞流与提升阶段;堵塞堆积高度越大,再启动所需的流量、压力差越大;管道内局部浓度过大易形成段塞流,影响管道输运效率。该分析预报方法为深海矿石输送的堵塞再启动方案设计提供了依据。
In the process of deep-sea mining,it is of great significance to study the restart process of pipeline blockage.The physical experiments and theoretical modelling are used to study the blockage restart of ores during hydraulic lifting in deep-sea mining.According to the characteristics of the particle motion,the blockage restart process is divided into stages.The criteria for distinguishing each stage,such as the average volume concentration and local volume concentration,are provided.The influences of the blockage height on the pressure and flow rate are analyzed.The flow rate and pressure drop of the slug flow during the restart process are predicted.The results show that the blockage restart process can be divided into loose-jump,slug flow and lifting stages.The greater the blockage height,the greater the pressure difference and flow rate required for restart.The excessive local concentration in the pipeline will lead to slug flow,which affects the efficiency of pipeline transportation.Based on the experimental results,the proposed predicting methods provides the references for the design of blockage restart during hydraulic transport.
作者
王艺扬
刘磊
WANG Yiyang;LIU Lei(SJTU Yazhou Bay Institute of Deepsea SCI-TECH,Sanya 572024,Hainan,China;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《实验室研究与探索》
CAS
北大核心
2023年第5期68-74,共7页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(51909164)
海南省科技计划三亚崖州湾科技城联合项目(520LH052)。
