Abstract

Slag water surface evaporation phenomenon exists in the system of water cooling slag removal. The author studied the relationship between slag water (from the JINJIE power plant in Shaanxi) surface evaporation rate and the relative humidity (40%∼90%) and the water surface temperature(35°C∼70°C), which at an atmospheric pressure and the wind speed was 0.5m/s. The experiment measured three kinds of concentrations of the slag water surface evaporation rate, and compared with the pure water surface evaporation rate at the same conditions. By the comparison results, the author analyzed underlying causes of slag water evaporation from the thermodynamic point of view, that is surface temperature and composition and content changed the surface free energy, thus affecting the slag water surface evaporation rate. It was found that water surface evaporation rate is 1.1∼1.2 times than the slag water in the range of 50∼70 °C, and the slag water surface evaporation rate changes in 10% in a certain concentration range.

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