MVR forced circulation evaporation crystallizer is suitable for evaporation concentration& crystallization for heat sensitivity (low temperature), high concentration, high viscosity and containing insoluble solids in the fields of chemical, food, pharmaceutical, environmental protection engineering, metallurgical industry, waste liquid evaporation recovery and other industries.
Evaporation crystallization is a clean separation method that uses evaporative solvent to increase the concentration of the solution so that the crystals in the solution can crystallize out. The Forced Circulation Crystallizer uses a forced circulation pump to drive the liquid in the system to circulate, thus achieving the purpose of continuous evaporation. ·
According to the crystallization laws of nucleation and growth of different crystals, the theoretical relationship between the rate parameters of crystallization process (nucleation rate, growth rate) and product particle size is analyzed, and the appropriate crystallization method and industrial crystallization equipment are selected. ·
Determine the appropriate concentration range for the crystallization process based on the solubility and metastable zone data of different systems. ·
During the crystallization operation, the morphology characteristics of the product can be controlled by controlling the process parameters such as crystal nucleation and growth rate, temperature, concentration and the choice of solvent.
Continuous evaporation crystallization, strict control of crystal size, easy to centrifuge separation; For inorganic salt products, it can achieve uniform particle size and high yield.
Working principle of MVR forced circulation crystallizer
The preheated material is fed from the feed port. When the liquid level reaches a certain height, the forced circulation pump starts and the material begins to circulate in the system. The material flows through the tube of the tubular heat exchanger and heats up with the steam in the shell.
After heating, the material enters the evaporation chamber, which is a negative pressure environment, and the material is flash steamed in the evaporation chamber.
The secondary steam produced by the evaporation chamber separator at the upper part of the gas-liquid separation into the compressor, after the compressor heating up the secondary steam again into the shell of the evaporator, with the heat exchanger tube in the material for heat exchange.
When the material in the system reaches saturation, the crystal begins to precipitate.
When the system monitors that the material meets the discharge conditions, it is discharged by the discharge pump, and subsequent operations such as thickening, centrifugal separation, drying, and packaging are carried out.
Features of MVR forced circulation crystallizer
Wide range of application
MVR forced circulation evaporator can be applied to a variety of industries and applications, such as salt production, chemical salt production, chemical wastewater treatment, ZLD wastewater zero discharge.
High heat transfer coefficient
Driven by the forced circulation pump, the material has high flow rate, large heat transfer coefficient and high heat exchange efficiency.
Easy to clean
The forced circulation crystallizer has simple structure, high material level and fast flow rate, so the system is easy to clean.
Excellent scaling resistance
Due to the full flow of the material in the heat exchange tube, and the high flow rate, the forced circulation crystallizer has excellent scaling resistance.
Scope of application of MVR forced circulation evaporation crystallizer
Vacuum salt making, mine salt, salt and nitrate separation and other traditional salt making industries.
It is suitable for the treatment of high salt, high COD and high boiling point production wastewater and high salt wastewater of pharmaceutical intermediates in chemical and pharmaceutical factories.
Evaporation crystallization of lithium battery cathode materials and ternary precursor new materials to recover lithium and zero emissions.
Supporting membrane reactor, biological treatment process, chemical treatment process, etc., to achieve chemical wastewater, biological sewage and other “zero discharge” and solid waste recycling.
