Three Output Membrane Hydrocyclone: Classification and Filtration

Abstract

In this study, through simulation and experimental verification, we proposed a novel hydrocyclone in which a tubular ceramic membrane passed through the overflow outlet to the underflow outlet. The centers of overflow and underflow outlets were tubular membranes equipped with an exit of outside-in filtration, and the overflow the underflow outlets were shaped into annular (donut shape) exits. Thus, this novel hydrocyclone has three outlets, namely the overflow dilute liquid, the underflow concentrated liquid, and clear filtrate. This system enabled higher dilution of hydrocyclone overflow concentration than that in the traditional system. Furthermore, underflow was more concentrated, and we obtained a clear filtrate. Therefore, this device can simultaneously perform classification and filtration, which is valuable for special liquid recycling. For instance, in wafer cutting fluid recovery in solar energy processes, the fluid with more silicon can function as the overflow, the fluid with more silicon carbide can function as the underflow, and the polyethylene glycol (PEG) organic solvent can function as the clear filtrate.

Effect of the Axially Inserted Solid Rod on the Flow Field Characteristics and Separation Performance of a Hydrocyclone

“…The inserted rods discussed above are all solid. However, Lin and Wu 23 inserted a tubular ceramic membrane to offset the air core and change the turbulence structure for enhancing separation efficiency. Most of the inserted solid rod is vertical and connects the overflow and underflow outlets.…”