Sodium chloride-potassium chloride mixed salt MVR evaporator salt separation system

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The salt separation system for MVR evaporators using sodium chloride-potassium chloride mixed salts is currently employed in MVR evaporation and crystallization systems for potassium and sodium separation; heat-based methods are used for salt separation in such systems. The editor from Chengyuan Evaporators will discuss with you the salt separation system for MVR evaporators using sodium chloride-potassium chloride mixed salts. I. Sodium chloride-potassium chloride mixed salt separation system: The potassium-sodium separation MVR evaporation crystallization system uses thermal methods for salt separation, featuring a short process flow and enabling the continuous production of both sodium chloride and potassium chloride products. Salt separation systems are commonly used in processes such as desalination of flue gas ash wash water in steel mills and desalination of fly ash wash water from waste incineration. For mixed salt solutions containing two or more salt components, it is first necessary to rely on the phase diagram of the water-salt system. Using this phase diagram, it is possible to predict in advance the direction and extent of the changes that will occur in the system when external conditions change. It is also possible to forecast the order in which salts will precipitate and the patterns of these changes, so that a specific salt we desire can be precipitated from the solution while another or several salts remain dissolved. This allows for the separation and extraction of individual salts, complex salts, and mixed salts. Therefore, to achieve fractional crystallization of mixed salts, it is particularly important to select appropriate salt separation processes and equipment. Our company possesses strong process design capabilities; we can simulate the process routes using engineering simulation software, achieving high accuracy. II. Principle of operation of the salt separation system in the sodium chloride-potassium chloride mixed salt MVR evaporator: The greater the temperature difference between high-temperature evaporation and low-temperature cooling, the better the separation efficiency of the system. Traditional evaporation processes often employ multi-effect counterflow + flash evaporation or multi-effect cross-flow configurations. With the changes in the energy structure in recent years and the maturity of manufacturing techniques for domestic single-stage, high-temperature rise MVR compressors, the use of MVR evaporators in the field of inorganic salt evaporation has expanded significantly, yielding considerable energy-saving benefits. Although its evaporation temperature cannot reach as high as that of multi-effect evaporators, its evaporation temperature of around 100°C is still well suitable for potassium-sodium separation processes. 1. The thermal MVR evaporation crystallization technique is employed to produce sodium chloride through evaporation crystallization at near-atmospheric pressure. 2. Utilize the difference in solubility of potassium chloride and sodium chloride to obtain a sodium chloride slurry at different temperatures, which is then filtered to yield potassium chloride product. 3. The device feeds continuously while producing two types of products. 4. The power consumption of the evaporator and steam consumption are limited by the potassium chloride content. III. Application scope of the salt separation system for sodium chloride-potassium chloride mixed salt MVR evaporators: 1. Evaporation, separation, and purification of sodium chloride-potassium chloride mixed salt solutions to obtain sodium chloride and potassium chloride products. 2. Sodium chloride and potassium chloride are separated through evaporation and desalination of fly ash washing water. 3. Purification and separation of solid mixed salts of sodium chloride and potassium chloride. IV. Equipment features of the salt separation system for sodium chloride-potassium chloride mixed salt MVR evaporators: 1. The two salts are separated simultaneously during evaporation, resulting in a short process and simple operation. 2. It is more economical for high-sodium and low-potassium salt solutions, with lower energy consumption. 3. A multi-effect evaporator can also be used to achieve the purpose of evaporating, separating, and purifying potassium and sodium.