Nickel sulfate evaporation and crystallization process
An evaporation crystallization, nickel sulfate technology, applied in nickel sulfate, multi-effect evaporation, crystallization separation and other directions, can solve problems such as unenvironmental protection and environmental pollution
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[0024] Depend on figure 1 It can be seen that nickel sulfate evaporation crystallization process of the present invention comprises the following steps:
[0025] Step 1. When the system is started, the fresh steam directly preheats the third plate heat exchanger, the first evaporative concentration device, and the second evaporative concentration device in the heat exchanger group, and generates secondary steam. When the system is in normal operation, the second The temperature of the secondary steam is raised by 12°C, and then part of the heated secondary steam supplies heat to the first evaporation and concentration device, and the temperature of the remaining heated secondary steam is raised by 6°C again to supply heat to the second evaporation and concentration device.
[0026] The first evaporative concentration device comprises a gas-liquid separator 9 and a falling film heat exchanger 10 arranged in the housing of the gas-liquid separator 9, and the falling film heat ex...
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