Analysis of the efficiency of a cloth cyclone: the effect of the permeability of the filtering medium

Abstract

-The cloth cyclone is a solid-gas separation device that consists of a Lapple cyclone whose conical section has been replaced by a conical filtering wall. The present research was undertaken with the aim of examining the influence of a conical filtering section made of three different materials on the performance of a Lapple design cyclone. The overall efficiency and pressure drops of the cloth cyclone and a conventional one were compared. The effect of the filtering medium on the behavior of the cyclone was also evaluated using an equation that correlates the cut size diameter with the operational conditions, the properties of the gas-solid system and the resistance of the filtering medium. The experimental results demonstrated that the overall efficiency of the conventional cyclone was similar to that of the proposed device, with the latter displaying a reduction in pressure drop. Consequently, energy costs are lowered when cloth cyclones are used.

An Overview of Numerical Simulations on Gas‐Solid Cyclone Separators with Tangential Inlet

“…Several investigators have considered the centrifugal force 11, 68, 70, 80, 82, 85, 91, 94, 95, 104, 109. The centrifugal force, drag force, and the gravity force are affected by some parameters, such as the cyclone dimensions, vortex finder dimensions, inlet flow rate, and particle size.…”

“…Square cyclone separator 79, the prolonged cyclone 80, the cyclone with separation tooth 81, cloth cyclone 82, and slit‐cone cyclone 83 are some cyclones proposed to enhance the separation efficiency. For example, Qian et al.…”

“…Rodriguez et al. 82 studied four models of a cyclone, including the conventional cyclone with the conical part made of metal, the filtering ones with the conical part made of polypropylene cloth, polyacrylate, and polyester. It was demonstrated that the pressure drop increases as the resistance of the filtering part enhances.…”

Numerical investigation of filtering cyclones using response surface methodology and CFD simulation approaches

“…This device is similar to the model proposed by Lapple as shown in Figure 2, however, the conical section consists of fabric. Rodrigues et al (RODRIGUES et al, 2003) performed the first study about bag cyclone. According to the author the substitution of the metallic conical section for a porous medium decreases the pressure drop (ΔP).…”

“…According to the author the substitution of the metallic conical section for a porous medium decreases the pressure drop (ΔP). As a result, the equipment operates with considerable savings of energy (RODRIGUES et al, 2003). Andrade and Damasceno (ANDRADE, A.…”