基于软翅的水平管气力输送系统实验研究

Experimental Study on Horizontal Pneumatic Conveying System with Soft Fins

在水平管气力输送系统物料入口上游处安装不同长度自由摆动的软翅,通过软翅的振动增大粒子的悬浮力,使气力输送系统的能量充分地用于粒子加速,使得系统能在低速状态下安全稳定地运行,从而达到节能的目的。采用PIV技术分析粒子垂直方向的速度分量和粒子的可视化图像,以掌握软翅对粒子的悬浮作用规律;通过实验测量系统的压力损失、最小输送速度并计算能量损失系数,以验证软翅的节能效果。

To save energy and improve the operation performance,a new pneumatic conveying system was proposed herein,where soft fins of free oscillation were mounted in a horizontal plane through the pipe axis in the front of inlet.The particles had larger suspension force because of fin＇s oscillation,then the energy was used to accelerate the particles as far as possible,so that the pneumatic conveying system can safely work in lower air velocity.In order to analyze suspension action of the soft fin,PIV（particle image velocimetry）technology was used to measure the vertical component of particle velocity and particle visualization images.And then energy-saving effects of fin were verified from the pressure drops,minimum and critical velocities and power consumption.