Sodium thiosulphate evaporatorProcess flow is followingsodium thiosulphate solution---tri-effect countcurrent Mixed type evaporator with DTB or OSLO crystallizer---buffer tank---centrifugal separationthe sodium sulphate liquid must be input to the third effect firstly,then the second effet,the last is the first effect, the first effect is forced circulation with DTB or OSLO crystallizer, the second and third effect is falling film type.
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