Sodium chloride is a common inorganic ionic compound with the chemical formula NaCl. It is a colorless cubic crystal or fine crystalline powder with a salty taste. The appearance is white crystalline, easily soluble in water, with good stability, and its aqueous solution is neutral. The solubility of sodium chloride in water does not change significantly with temperature, and the boiling point of saturated sodium chloride solution does not rise too high. MVR can be used for evaporation concentration,.
According to the increase in boiling point and changes in solubility of sodium chloride solution, different forms of MVR evaporation can be used for different concentrations of sodium chloride wastewater.
In low concentration areas, a falling film MVR form can be used, while in high concentration areas, a forced MVR form can be used, with multi-stage MVRs connected in series and secondary steam connected in parallel according to the concentration. Maximize the utilization of effective temperature differences.
The principle of MVR evaporator is to use a high-efficiency steam compressor to compress and evaporate the secondary steam generated by evaporation, convert electrical energy into heat energy, increase the enthalpy of the secondary steam, and heat the secondary steam into the evaporation chamber to achieve the purpose of recycling the existing heat energy of the secondary steam, so as to achieve the purpose of evaporation concentration through self circulation of the evaporator without the need for external fresh steam. Control system temperature, pressure, and motor speed through PLC, industrial computer (FA), configuration, and other forms to maintain system evaporation balance. In theory, using an MVR evaporator saves over 80% of energy, over 90% of condensate water, and reduces footprint by over 50% compared to traditional evaporators.