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Three-effect evaporator production method and heating requirements
- Jun 25, 2018 -

The three-effect evaporator is mainly operated by three groups of evaporators, condensers, salt separators, and auxiliary equipment that are connected in series to operate in series to form a three-effect evaporator. The entire evaporation system adopts continuous feed continuous production.

The high-salt wastewater from the three-effect evaporator first enters a one-effect forced circulation crystallization evaporator. When the crystallization evaporator is operated, the crystallization evaporator will be equipped with a circulation pump to a certain extent, and when it is used, the waste water will be effectively driven into evaporation. In the hot chamber, in the evaporative heat exchange chamber, external vapors are liquefied to generate latent heat of vaporization, and the waste water is heated.

When the three-effect evaporator operates, the pressure in the evaporative heat exchange chamber is large, and the waste water is heated to overheat in the evaporating heat exchange chamber at a pressure higher than the normal liquid boiling point during the operation. After the heated liquid enters the crystallization evaporation chamber, the pressure of the waste water drops rapidly and part of the waste water flashes or rapidly boils.

The vapor after evaporation of the waste water enters a two-effect forced circulation evaporator as a power steam to heat the two-effect evaporator, and the unevaporated waste water and salt temporarily exist in the crystal evaporation chamber. One-effect, two-effect, and three-effect forced-circulation evaporators communicate with each other through a balance pipe. Under the effect of negative pressure, high-salt wastewater flows from one effect to two effects and three effects in turn. Wastewater is continuously evaporated. The concentration of salt is getting higher and higher, when the salt content in the waste water exceeds the saturation state, the salt in the water will continuously precipitate and enter the lower salt-collecting chamber in the evaporation crystallization chamber.