Combustion processes in furnace chambers of Kazakhstan TPPs using high-ash coal

Abstract

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).

Air Pollution from CHPP-2 in Almaty and Its Health Impact

“…The planning structure of the city is characterized by a complex landscape and geographical position. Almaty, as a representative example of a large city with a developed industry and the presence of large thermal power facilities, has poor air self-cleaning resources 8) . Factors of self-purification of air masses by wind are at an insufficient level to maintain the required level of indicators of the state of atmospheric air.…”