Abstract
Among the new coal technologies the burning of low-grade coal in the form of coal-water slurry fuel (CWSF) is of a great interest. The basis of CWSF is a highly concentrated coal-water slurry consisting of finely ground coal, water or other liquid and plasticizing agents. The development of CWSF technology is highly relevant for solving global problems of resource conservation and ecology. The study is dedicated to CWSF properties with respect to Kansk-Achinsk coal and water. This paper presents the results of the influence of CWSF’s preliminary cavitation water treatment on the combustion dynamics of fuel, (including the features of the combustion temperature trends, delayed ignition time and time of complete combustion) and on its environmental characteristics. A rotary-type hydrodynamic oscillator at high angular velocity (10000 rpm) was used in supercavitation mode. It is shown that the technology of cavitation water treatment leads to a change in the dynamics of CWSF’s combustion and to an additional decrease in NOx emissions by 1.6 times, CO2 by 1.3 times.
Highlights
Coal is an important energy and technological raw material, but it is characterized by the highest environmentally harmful emissions compared to other types of fossil fuels
This paper presents the results of the influence of coalwater slurry fuel (CWSF)’s preliminary cavitation water treatment on the combustion dynamics of fuel, and on its environmental characteristics
Combustions dynamic The properties of the dispersion medium, i.e. cavitation-activated water, in a coal-water slurry leads to a change in the dynamics of the combustion of a CWSF's drop
Summary
Coal is an important energy and technological raw material, but it is characterized by the highest environmentally harmful emissions compared to other types of fossil fuels. The development and introduction of environmentally friendly technologies is important for the successful development of the coal industry. I.e. coal-water slurry fuel (CWSF), is considered to be the most environmentally friendly energy technology [2]. The paper presents the results of the use of resource-saving cavitation technology for controlling the thermophysical and environmental characteristics of coal-water fuel applied to Kansk-Achinsk brown coal.
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