Coalescence of an emulsion in a fibrous bed: Part II. Experimental

Abstract

A model of a fibrous bed relating the ratio of the outlet and inlet particle number densities to the various system parameters is tested experimentally. The degree of bed saturation is also determined from single phase and two phase flow data. The inlet and outlet particle number densities are determined by light scattering. It was found that the model does predict the effect of particle size, fiber size, bed length, and degree of saturation consistent with experimental observations. However, the coalescence efficiency based upon aerosol filtration theory is not amenable to the fibrous bed over the widest range of flow velocities.

Removal of Oil from Produced Water by Coalescence/Filtration in a Granular Bed

“…A model was presented to determine overall coalescence efficiency [16,17,18]. Although the equations were developed for fibrous bed coalescers, the authors stated that they can also be applied to granular beds with changes made to account for a different hydraulic radius.…”

“…The friction factor was calculated using equation (x) for single and two phase flow and then plotted f k versus (1 -) / N re [17]. The value for t was determined from the plots by the displacement of the two phase flow data above the single phase flow data.…”

Effect of the Mixed Oleophilic Fibrous Coalescer Geometry and the Operating Conditions on Oily Wastewater Separation

“…With the increase of the hydrodynamic forces, the size of the droplets swept from the fiber surface decreases [25]. The degree of saturation decreases when the superficial velocity increases, which contributes to a lower droplet capture possibility [28]. All these factors result in the decreasing tendency of E and QF.…”

“…The increase of the pressure drop with increasing inlet oil content can be ignored. Kintner and Sherony [28,29] developed a collision model that considers two types of collision. In the first type, the droplets move with the continuous phase and collide with other droplets attached onto the fibrous bed, which is referred to as the interception.…”

Filtration application from recycled expanded polystyrene

“…One important factor that controls the performance of a filter medium in the separation is the fiber size. Filter media with large fiber contact areas per unit volume generally perform better than media with lesser surface areas [1][2][3][4][5][6][7][8][9][10][11].…”