Control of evaporation

For certain liquids, tile temperature of a boiling solution of the unknown may be compared with that of boiling water at the same pressure, For a given solution, the boiling-point elevation may be calibrated in terms of specific gravity at standard temperature. Usually two resistance thermometers are used. The system finds use in the control of evaporators to determine the endpoint of evaporation, Good accuracy is achieved in the determination of one dissolved component, or of mixtures of fixed composition. 

Control of evaporation (decomposition) process Contrivance of precursor materials freeze drying, spray drying, mist decomposition, explosion coprecipitated oxalate decomposition, amorphous citrate decomposition, decomposition of solid solutions of cyanides and hydroxides ... 

Control of evaporation rales is much easier with large-scale equipment. Continuous operations such as belts, rotary kilns, fluidized, and spray driers... 

The production of Zousoon was described by Chang et al. (1991) as traditionally produced in Taiwan. The production process is empirical and is more of an art than a science. These workers described a modified clothes dryer developed to tumble and dry the product, which was shown to result in improved heat transfer and greater shear force that gives better control of evaporation of water while causing the muscle bundles to disintegrate into smaller subunits. The predried product was finished in a steam-heated... 

Because of the unpredictable performance of thermocompressors, control of evaporators using them is more difficult than for a conventional system where it is necessary to set only steam and feed rates to maintain a constant evaporation rate. One way to provide flexibility with better operating stability is to use two or more thermocompressors in parallel. This permits capacity control without loss In energy economy. 

Control of evaporation The human skin provides a relatively dry and semipermeable barrier to fluid loss. 

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