深海多金属硫化物集矿罩的流场分析和参数优化

摘要

在1种新的深海多金属硫化物开采设备的基础上,以双螺旋滚筒采集罩下的流体为研究对象,针对硫化物采集过程中可能形成的复杂多相流以及可能造成对周围海域生态环境污染等问题,采用Fluent的Coupled SIMPLE算法及RNG k?ε湍流模型对流场进行仿真计算和分析比较,并且对多个物理参数,如2个滚筒之间的中心距、滚筒的转速、转动方向、矿物的堆积高度、矿物的颗粒直径和抽吸速度等进行优化.研究结果表明:为了达到最优的抽吸效果,2个滚筒中心距有最优值;海水入口处的速度不是越大越好,当海水入口处速度达到2 m/s后,再增加海水速度对缩短抽吸时间的效果不明显;2个滚筒相向运动对缩短抽吸时间效果明显;减少矿物粒径对缩短抽吸时间效果不明显.%On the basis of a new deep-sea polymetallic sulfide mining device, the fluid under the double spiral drum collecting hood was used to study the complex multiphase flow which may be formed during the sulfide collection process and the possible impact on the surrounding marine environment pollution and other issues, coupled SIMPLE algorithm and RNGk?ε turbulence model of the CFD software Fluent were used to simulate and analyze, a number of physical parameters were chosen for optimization, such as the center distance between two spiral drums, drum speed, rotation direction, mineral accumulation height, the ore diameter, pumping velocity and so on. The results show that the distance of two drums has the optimum value to reach the optimal pumping effect. Seawater at the entrance of the speed is not the faster the better, when the speed reaches 2 m/s, shortening the pumping time effect is not obvious. The opposite direction of drums can reduce the time of pumping. Mineral particle size also has slight impact on pumping time.