Semi-Empirical Correlations of Pollution Processes on the Condensation Surfaces of Exhaust Gas Boilers with Water-Fuel Emulsion Combustion

Experimental research of low-temperature pollution kinetics on exhaust gas boiler condensation surfaces with water-fuel emulsion combustion to obtain approximation equations for prediction of processes development are carried out. Thermotechnical measurements of parameters were carried out by standard methods; a theory of test modeling and planning was used for experiment processing, and statistical analysis—for experimental data treatment. Based on the experimental data the semi-empirical correlation dependences of specific pollution mass from water content of water-fuel emulsion, sulfur content in fuel oil and excess air factor at wall temperatures below the dew point temperature of sulfuric acid vapor have been developed. The regression equation is obtained for determining the specific pollution mass on the low-temperature heating surfaces. The regression equations make it possible to estimate the influence of various factors such as water content of water-fuel emulsion, sulfur content in fuel oil and excess air factor of pollution intensity. The obtained model allows to describe the pollution process adequately and to determine the values of factors where the lowest intensity of pollution is observed. The received correlations and equation for specific pollution mass can be used for determining thermal resistance of pollution layer, which is necessary for designing and operating of the exhaust gas boiler condensation surfaces.