Analysis of Solvent Evaporation Crystallization Operation Features
The evaporation crystallization process is a part of solvent and solute separation in a solution. Therefore, the evaporation crystallizers produced by Zhuoyun Technology are designed for separating volatile solvents during evaporation operations and non-volatile solutes in the solution. Since the evaporation rate of the solvent depends on the heat transfer rate, it falls under the operation of thermal conduction processes. The heat transfer equipment for evaporation devices, however, has the following characteristics compared to the general operation of evaporation heat transfer processes.
1. Solution's Boiling Point Increases
Due to the presence of non-volatile solutes in the solution, its vapor pressure is lower than that of the pure solvent at the same temperature. Additionally, the boiling point of the solution is higher at the same pressure, and the higher the concentration of the pure solvent, the greater the impact.
2 Materials and Process Features
Substances often deposit on the heated surface at varying concentrations, solutes, or impurities, forming scale layer deposits that affect heat transfer. Some solutes are heat-sensitive, and prolonged exposure to high temperatures can lead to easy spoilage. Certain materials are more susceptible to corrosion or exhibit higher viscosity, among other factors.
3 Energy Recovery
The evaporation process of volatile solvents is a high-energy-consuming unit operation in this process, due to the large latent heat of evaporation of the solvent. Therefore, energy conservation should be considered an important issue in the operation of evaporators.
