Experimental Study of a Solid-Liquid Mixing and Conveying Pump with Variable Flow and Proportion

摘要

To achieve the mixing and conveying of solids and liquids and meet the requirements of variable flow, proportion, and uniform mixing, a novel two-phase flow pump was designed, built, and investigated in this research. The spiral conveyor was used to convey solid powder and transfer volume was controlled using the rotation speed of the spiral conveyor. The twin screw pump conveyed liquid and mixture, and the transfer volume of the liquid was controlled using rotation speed and the outlet pressure of the twin screw pump. The gear transmission chamber drove the mixing impeller to achieve uniform mixing of solid and liquid so the different transfer volumes of powder and liquid could achieve variable solid-liquid proportions. The experiment demonstrated the transfer volume and rotation speed curve of the powder with the motor speed of the spiral conveyor ranging from 0 to 100 r/min, and the rotation speed and outlet pressure curve of liquid when the liquid flow rate was 4 L/min, 6 L/min, 8 L/min, and 10 L/min, respectively. The performance curve was used to guide the mixing test. Finally, the mixing proportion was set to 5% and 10%, and the outlet pressure was set to 100 kPa and 400 kPa. Then four sets of mixing tests were conducted, and the results were evaluated. The two-phase flow pump designed in this paper achieved mixing and conveying of solid-liquid two-phase materials and meets the requirements of variable flow, proportion, and uniform mixing.