Product Display
In the treatment process of secondary zinc oxide ash obtained from zinc containing dust sludge in steel plants, potassium, sodium, and insoluble substances in the secondary zinc oxide ash are separated by washing with water.The obtained solution is evaporated and crystallized to separate potassium chloride, sodium chloride, and distilled water. This device completes the separation of potassium chloride and sodium chloride. This equipment is commonly used for the treatment of process wastewater such as dust removal and flue ash rinsing in steel plants, pharmaceutical intermediate by-products, and waste incineration fly ash washing water. Realize economic value. Applicable to the salt requirements for evaporation crystallization of wastewater containing mixed components of sodium chloride and potassium chloride. The evaporator often uses a triple effect forced circulation evaporator.
working principle
Due to the different solubility of sodium chloride and potassium chloride, the solubility of potassium chloride is higher than that of sodium chloride. At the same time, as the temperature increases, the solubility of potassium chloride increases, while the solubility of sodium chloride does not change significantly with temperature. We utilize the principle that the solubility ratios of sodium chloride and potassium chloride are different under different temperature conditions, and through the conversion of different evaporation temperatures, the saturation states of the two salts are corresponding at different temperatures, resulting in the precipitation of pure potassium chloride and pure sodium chloride, respectively. Sodium chloride is often precipitated at high temperatures.
This process uses triple effect evaporation or MVR evaporation+vacuum flash evaporation or cooling crystallization to precipitate sodium chloride, triple effect evaporation or MVR evaporation to precipitate sodium chloride and vacuum flash evaporation or freezing crystallization to precipitate potassium chloride. The mother liquid of potassium chloride and sodium chloride is returned to the system for circulation according to the situation. The purpose of separating potassium chloride and sodium chloride has been achieved.
Performance characteristics
This system can obtain qualified sodium chloride and potassium chloride, and the condensed water is returned to the process system.
The precipitated salt meets the national standard, among which
Sodium chloride: meets the national standard GB/T5462-2003, refined industrial salt grade II.
Potassium chloride, in accordance with the national standard GB/T7118-2008, industrial salt level 2.
The process is reliable and stable, with low energy consumption, small investment, low operating costs, and various indicators that meet the requirements of energy conservation and environmental protection.
Adapt to materials
This equipment is commonly used for the treatment of process wastewater such as dust removal and flue ash rinsing in steel plants, pharmaceutical intermediate by-products, and waste incineration fly ash washing water. Realize economic value. Applicable to salt requirements for evaporation crystallization of wastewater containing mixed components of sodium chloride and potassium chloride
technical specifications
Potassium chloride and sodium chloride multi effect evaporation+flash crystallizer
Our company optimizes the design based on the composition of your company's wastewater