Solid fuel plays significant role in the development of civilization as the main fuel source. Use of low-grade (ash content ~ 40-45%) coal is partially offset environmental problems also affect human health when it is burned. As the main industrial corporations use coal, in particular low-grade high-ash content coal from Ekibastuz coal basin because of its cheap cost the atmosphere of megacities like Almaty is polluted by noxious volatile. In this study were developed a mathematical model of turbulent heat and mass transfer process occurring in the combustion chamber of SB-39 of Aksusskaya TPP for control the concentration of volatile and to recommend the optimize methods for burning process. Based on 3D computer modeling investigated formation of harmful dust and gas emissions during the combustion of low-grade coal and offered cost-effective methods of burning.

In this article, a study of the processes of heat and mass transfer in high-temperature and thermochemically activated reacting flows in a real physicochemical system (turbulent flows with physicochemical transformations in combustion chambers) in three-dimensional geometry using numerical methods was carried out. As a result of computational experiments vector distribution full velocity, temperature fields, fields of concentrations of nitrogen oxides NO over the entire volume of the combustion chamber were obtained and a comparative analysis was carried out for the two boilers. The results obtained allow us to conclude that the use of plasma preparation of a pulverized coal torch for combustion has a positive effect on the process of heat and mass transfer and allows minimizing emissions of harmful substances.

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In this article, carried out computational experiments to study the aerodynamic, thermal and concentration characteristics in combustion chamber of the boiler BKZ-420 Almaty TPP-2. Combustion chamber BKZ-420 has a significant drawback, which is that of a jet of hot air hitting the wall that is opposite the burners. This leads to her firing and a further violation of integrity. On the Almaty CHP-2 in the basic mode using this wall served cold the air mass flow 5 kg/s. In this paper, we proposed a new flow mode, which allows you to protect the wall from overheating, to reduce the temperature of the incoming flow more cold air. Carried out researches have allowed to conclude that the proposed regime provides not only protection against overheating of the boiler walls, but also reduces the concentration of harmful emissions. As a result of computer experiments were obtained fields of velocity, temperature, concentrations of harmful dust and gas emissions (CO, CO2, NO2) formed in combustion of solid fuels for different layout options holes and speed boost-extra air (5kg/s and 10 kg/s).