Evaporation of aqueous suspension drops with ground admixtures in the region of high-temperature combustion products

• Published in: Theoretical foundations of chemical engineering 2017-07, Vol.51 (4), p.468-475
• Main Authors: Vysokomornaya, O. V., Kuznetsov, G. V., Strizhak, P. A., Shcherbinina, A. A.
• Format: Article
• Language: English
• Subjects: Admixtures; Chemistry; Chemistry and Materials Science; Clay soils; Combustion products; Evaporation; Fire protection; Heating; Industrial Chemistry/Chemical Engineering; Optics; Sand; Thermal engineering; Water purification
• ISSN: 0040-5795; 1608-3431
• DOI: 10.1134/S0040579517040297

The effect of typical admixtures (clay, sand, soil, and silt) on the integral evaporation characteristics of aqueous suspension drops in high-temperature gases (at nearly 1100 K) has been experimentally studied using optical methods and a high-speed video record system (up to 10 5 fps). The heating and evaporation of suspension drops was established to appreciably intensify with a change in the relative mass fraction of admixtures within γ = 0–0.1 for sand and γ = 0–0.01 for clay, soil, and silt. An essential effect of the preliminary heating of suspensions on the intensity of their evaporation in a flow of high-temperature gases has also been revealed. Some recommendations have been formulated for selecting evaporation parameters for the studied suspensions in contemporary and advanced high-temperature chemical and thermal engineering technologies for the purification of water from admixtures and in the sphere of fire safety.