The hydrodynamic dust retention modeling process with a foam layer for open linear dynamic technological systems at construction industry enterprises

Vadim Bespalov,Irina Tsarevskaya,Ludmila Alekseenko,Oksana Gurova,T Abbasian Najafabadi,A Nguyen Dong,K Yeghiazaryan,V Mladenovic,I Sevostianov

doi:10.1051/matecconf/201713204023

Vadim Bespalov, Irina Tsarevskaya + Show 7 more

Open Access

https://doi.org/10.1051/matecconf/201713204023

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Abstract

The physical essence of the reducing air pollution hydrodynamic method by means of the foamy method as the most effective dust retention technology for open long sources at construction industry enterprises is presented in the article. The mathematical description of this technology has been performed, taking into account the physical and chemical properties of the dust and foam bubble, as well as the parameters of the return of dust particles to technological raw material due to various physical mechanisms for their capture. The obtained parametric dependence of dust retention efficiency provides the possibility of its predicted calculation as a resultant parameter for the considering technology, taking into account the interaction of dust with a foam layer.

Highlights

IntroductionThe operation of construction industry enterprises, for which belt conveyors are one of the main types of linear dynamic systems of process equipment, is accompanied by intensive formation and release of particles [1,2]
At present, the operation of construction industry enterprises, for which belt conveyors are one of the main types of linear dynamic systems of process equipment, is accompanied by intensive formation and release of particles [1,2].Analysis of modern studies results [3] allows us to assume that the most effective technology for the retention of inorganic dust PM2,5 and PM10 with a SiO2 > 70% for belt conveyors at construction industry enterprises is the hydrodynamic method based on the foam layer application
As a result, taking into account the probabilistic realization of the successive interdependent physical mechanisms of dust particles interaction [7,8] with a foam layer, the dust suppression efficiency is described by the following dependence: Eef-dr= 1–(1–Eef(1)-dr)·(1-Eef(2)-dr)·(1–Eef(3)-dr), (7)

Summary

Introduction

The operation of construction industry enterprises, for which belt conveyors are one of the main types of linear dynamic systems of process equipment, is accompanied by intensive formation and release of particles [1,2]. The Gibbs effect develops itself when under the influence of mechanical or thermal perturbations, causing the film to stretch, local surface tension differences arise and cause the flow of surfactant molecules in the adsorption layer toward a lower concentration-toward the stretched part of the film [5,6] Another basic parameter characterizing the state of the foam is its multiplicity Kn, which is in a certain dependence on the resistance and is the ratio of the volume Vn of the foam to the volume Vp of the liquid that went into its formation: Kf = Vf / Vs = 0.78 · D2·π·g · υs / Qr,. The efficiency of the foam method of air dedusting can be controlled by changing the parameters discussed above with the appropriate organization of foam technology and the supply of foam to the dust suppression zone to provide a shielding effect

Materials and Methods

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Discussion

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