![]() ![]() Two representative cases with monodispersed particles of 1 μm and 10 μm diameter are considered for the numerical analysis. The paper discusses the influence of the number of charges acquired by the particles and the corresponding inlet gas velocities on particle concentration distribution within the w ESP. The proposed drift flux model is implemented in the opensource CFD code OpenFOAM®. In addition to the RNG k - ε model for the mean turbulent flow field inside the w ESP, the Poisson equation for the electric field, the charge continuity equation and the concentration equation are solved sequentially to obtain a full-fledged solution to the problem under investigation. The geometric parameters of a model w ESP and the corresponding inlet gas velocities for the w ESP are chosen from available experimental data. The present study is concerned with the numerical modeling of particulate removal in a tubular wet single-stage electrostatic precipitator (w ESP. The tubular ESPs have many advantages over conventional plate-plate and wire-plate ESPs. Modelling Particulate Removal in Tubular Wet Electrostatic Precipitators Using a Modified Drift Flux Modelĭirectory of Open Access Journals (Sweden)įull Text Available Tubular electrostatic precipitators ( ESP have been used in a number of chemical processing industries. This work is based on a fundamental experimental study of the negative corona discharge and on numerical simulations of this discharge under conditions close to those of the lab scale ESP developed by the CEA. The aim of this study is to determine how the electrostatic precipitation dedicated phenomena, especially the specific high voltage generator, the gas temperature and the fact that particles are flowing through the gap then collapsing on the electrodes, modify the discharge to improve the efficiency of ESPs. The work presented in this thesis concerns the study of negative corona discharges in air at atmospheric pressure occurring in an electrostatic precipitator ( ESP) developed by the CEA (Atomic Energy Committee). Indeed, this kind of process can capture submicron particles without producing secondary wastes (no filter media) and without pressure looses in the exhaust circuit. Application to the electrostatic precipitationĮlectrostatic precipitation presents many advantages from the nuclear wastes treatment's point of view. Under the premise of ESP having a high efficiency of dust removal, equipment volume may be actually reduced to 1/5 to 1/10 of the original volume and energy consumption may be reduced by more than 50%. It is indicated that compared with conventional ESP, the electric field length has been reduced to 1/10 of the original, the current density on the collecting electrode increased 3-5 times at the maximum, the approach speed of dust particles in the electric field towards the collecting electrode is 4 times that in conventional ESP and the electric field wind speed may be enhanced by 2-3 times the original. By means of the theory of electrostatics and fluid dynamics, a corona assembly with a self-cleaning function and a threshold voltage automatic tracking technology has been developed and used in ESP. Because of its' large size, high cost and energy consumption, the scope of application of ESP has been limited to a certain extent. Dust particles or other harmful particles from the airstream can be precipitated by ESP with great collecting efficiency. International Nuclear Information System (INIS)ĮSP ( Electrostatic Precipitation) has been widely used in the mining, building materials, metallurgy and power industries. of metals from spent lithium ion secondary batteries using A. ability of micro organisms to transform solid compounds. ![]() Key words: Fungal leaching, sponge iron, electrostatic precipitator ( ESP) dust, metal dissolution. ![]() This paper reports the dissolution of Zn, Cu, Pb, Mn and Fe from the ESP dust using three fungal species, Aspergillus niger, . Ĭoal based sponge iron industries in India generate considerable quantity of solid waste, 40% of which is flue dust produced from the electrostatic precipitator ( ESP) connected to rotary kiln. Dissolution of heavy metals from electrostatic precipitator ( ESP) dust. ![]()
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