Simulation of Nitrogen Oxides Formation as Air Pollution on the Example of Real Combustion Furnace

As in other countries in Central and West Asia, most of Kazakhstan's power plants have reached their potential as they were built mainly during the Soviet era. In this regard, it is important today to optimize coal consumption processes, introduce new environmentally friendly technologies and reduce emissions. And it is impossible without conducting detailed studies of the combustion of fuels in the combustion chambers of energy devices. It can provide complete information about the nature of complex processes of heat and mass transfer without special financial, time and labor costs. The existing models of the formation and destruction of nitrogen-containing substances NOx do not have a universal nature of use, since the fuel and combustion conditions are different. In this regard, the proposed work considered two models that are widely used. The aim of this work is to select a model that actually can describe the processes of dioxin formation in the combustion chamber of a real CHP boiler when high ash content coal is burned in it. The results of the simulation were verified with the data of field experiments, which allows an objective conclusion to be made. The obtained research data and the method of applying the selected optimal kinetic scheme of dioxin formation contribute to the development of new and optimization of existing measures to control environmental pollution

DEVELOPMENT OF THERMAL TECHNOLOGY FOR DISPERSED MATERIALS PROCESSING

The article contains information on the work of the department of thermal heterogeneous processes of the Institute of Gas of the NAS of Ukraine over the past ten years, devoted to the development of scientific and technological foundations for the thermal treatment of dispersed materials. The problem of the efficient use of natural resources in connection with the reduction of fossil energy resources while increasing their demand to meet the growing needs of production is discussed. The results of mathematical modeling of the heat treatment of dispersed materials are presented — a detailed study of the co-combustion of wood particles with natural gas is carried out taking into account the main stages of the process, a methodology for the qualitative and quantitative analysis of the process of dioxin formation during high-temperature processing of chlorine-containing waste is described. The possibilities of using carbonate sorbents for trapping sulfur compounds are evaluated. A detailed mathematical description of the endothermic process of calcining limestone particles during its passage through the high-temperature zone of the heated inert particles of the fluidized bed is carried out. The technology of three-stage processing of material in fluidized-bed apparatuses and the design of a reverting furnace combined with a recuperator, which is an element of energy conservation, have been developed. Created and implemented technologies in production of heat-insulating materials from hydrosilicates, perlite, mineral wool products. Schemes, dependencies of technological parameters, technical characteristics and general view of the implemented developments are given. Ref. 27, Fig. 10, Tab. 2.