Forced Circulation evaporator These systems can be either single or multiple effects and the vapor re-compression concept (either thermal or mechanical) is often applied. Usually, they operate from low vacuum to atmosphere pressure. As a rule, these units are used for high evaporation rates and when crystal size is not of the utmost importance or if crystal grows at a fair rate. Almost any material of construction can be considered for the fabrication of these evaporator Typical products are: - NaCL - KCL- NH4CL- BaCL2-CaCL2-MgCL2 etc - Na2SO4-K2 SO4-(NH4)2SO4- ZnSO4-MnSO4-MgSO4-NiSO4 etc -Na2SO3-Na2S -Na2CO3-K2SO3-NaAC-etc
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