Modeling of the atmosphere pollution from coal trains

Abstract

Coal trains have an intensive impact on environment pollution. It is very important to predict adequately this impact during coal transportation. In Ukraine to predict atmosphere pollution from coal trains the regulatory model «OND-86» is used. This model does not take into account some important factors and coal train movement. We present numerical models to solve two problems:1) prediction of atmosphere pollution in the case of moving coal train; 2) prediction of atmosphere pollution in the case of additional special boards installation on the coal wagon. To solve these problems equation of coal duct convective-diffusive dispersion (Lagrange model of admixture dispersion) and equation of potential flow were used. Governing equations were numerically integrated using implicit difference schemes. For coding difference equations we used FORTRAN language. We present results of numerical experiments and laboratory experiments which illustrate the efficiency of the special additional boards installation on the coal wagon. These boards have «internal wing» and «external wing». The obtained results illustrate that installation of additional boards allows to minimize the atmosphere pollution near transport corridor.

Modeling coal dust dispersion from pile with protection barriers

“…(1) and (2) are Navier-Stokes equations and (3) is equation of pollutant dispersion. Initial and boundary conditions for modeling equations ( 1) -( 3) are discussed in [1,4].…”

“…Worthy of note, that coal dust emission rate depens on different factors, but the most importnt is the local wind speed near the coal pile surface. To calculate the coal dust emission rate from the coal pile surface, following empirical dependence is used [1]:…”

“…For numerical integration of modeling equations ( 1) -( 3) we used implicit difference schemes of splitting [1,4]. Worthy of note that for the problems of coal dust concentration prediction near the coal piles it is very important to simulate the geometrical form of piles or barriers.…”

“…The coal industry has a negative impact on environmental pollution [9]. Intensive atmosphere pollution takes place during coal transportation or storing coal in piles [1,2,8,9]. To reduce the intensity of environment pollution from coal piles, different methods are used (application of special solutions, watering, etc.).…”

Numerical model for evaluation efficiency of coal pile wetting

“…Coal production plays a significant role in Ukrainian economics. It is well known that production of coal, its transportation or storage are sources of different problems from ecological point of view [1,10]. It is known that coal piles are powerful sources of air pollution in work areas.…”