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Nickel sulfate is an inorganic substance that can be classified into triple types: anhydrous (NiSO4), hexahydrate, and heptahydrate. The products are mostly hexahydrate, with two variants: alpha type and beta type. The former is a blue tetragonal crystal, while the latter is a green monoclinic crystal. Six crystal water were lost when heated to 103 ° C. Easy to dissolve in water, slightly soluble in ethanol and methanol, its aqueous solution is acidic, slightly soluble in acid and ammonia water, and toxic. Mainly used in the electroplating industry, it is the main nickel salt for electroplating nickel and chemical nickel, and also the source of metal nickel ions. It can dissociate nickel ions and sulfate ions during the electroplating process.
MVR evaporation is commonly used for evaporation, and triple effect evaporation or multi effect evaporation can also be used as needed. The evaporation method often adopts forced circulation evaporation.
The Oslo crystallizer is commonly used for crystallization to precipitate nickel sulfate crystals
working principle
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.
Performance characteristics
Our designers carefully studied and analyzed the material properties, calculated the heat transfer capacity, pressure loss, and temperature difference loss of the equipment in detail. In order to save heating steam as much as possible, we set up a condensate preheater and a steam preheater to heat the material to boiling point for feeding. In addition, due to the complex composition of the material, if the secondary gas is carried into the compressor, it will affect its working performance and subsequent processing. The separation chamber is subjected to forced circulation evaporation, and the entrainment of mist and foam will be more severe. Therefore, we increased the separation height and installed two-stage demisters, first stage baffle demisters, and first stage labyrinth demisters at the top of the separation chamber.
The solution consists of a titanium evaporator, MVR compressor system, and PLC automatic control system, which not only saves the operating cost of the evaporator but also improves production efficiency.

Adapt to materials

Nickel sulfate evaporation

Nickel sulfate crystallization

Nickel sulfate evaporation crystallization


technical specifications

For more details, please consult us. Our company will optimize the design based on the conditions.