A desalination system that includes a plurality of evaporators that are fluidly connected in series, a primary compressor that is fluidly connected to the evaporators to provide a compressed vapor to the evaporators to run the desalination system, and a secondary compressor that is arranged in parallel relative to the primary compressor, wherein the secondary compressor extracts a portion of vapor from a first evaporator and/or one intermediate evaporator in the series and delivers the vapor to the first evaporator. Various combinations of embodiments of the desalination system are provided.

A water treatment system comprising a mechanical vapour compression apparatus (11), the mechanical vapour apparatus having a evaporation/condensation vessel (11a) and a recirculation circuit (20) whereby recirculated water is pumped from an outlet (18a) of the evaporation/condensation vessel (11A) to an inlet (18B) of the evaporation/condensation vessel (11A), wherein the recirculation circuit (20) comprises a fluidized bed crystallizer (22), and at least part of the recirculated brine is passed through the fluidized bed crystallizer (22) to remove dissolved minerals therefrom.

Systems and processes for heat recovery associated with the separation of hydrocarbon components. Two compressors are used to compress a portion of an overhead vapor stream from a fractionation column. A pressure of the liquid portion of the compressed overhead is reduced and used to recover heat from an overhead of another separation zone having a fractionation column. Once the heat has been recovered the stream is recompressed. The recovered heat may be removed from the recompressed stream in a reboiler of another fractionation column. The fractionation columns may comprise a deethanizer stripper, propane-propylene splitter, and a depropanizer column.

A method for comprehensively treating low-concentration ammonia-nitrogen wastewater by completely recycling is disclosed. The low-concentration ammonia-nitrogen wastewater and carbide slag or quick lime are mixed and reacted to obtain a mixed solution containing ammonia water and ammonium chloride. The mixed solution is transferred into an ammonia-water evaporative concentration tower to separate the ammonia water and thus obtain an ammonia vapor and a calcium chloride waste solution. The ammonia vapor is transferred into an ammonia-water cooler, and the calcium chloride waste solution is introduced into an aging pool for aging, and then filtered to obtain a purified calcium chloride solution; and the purified calcium chloride solution is introduced into an MVR triple-effect evaporator for evaporation, so as to obtain distilled water and a concentrated calcium chloride solution. The concentrated calcium chloride solution is introduced into a fluidized bed for spray granulation, so as to obtain an anhydrous calcium chloride product.

The present disclosure relates to a distillation system for separating a mixed material existing in feedstock into a high volatile component and a low volatile component using difference of boiling point, the system comprising: an evaporation-separator which evaporates the high volatile component to discharge the high volatile component as an overhead vapor; a first compressor which receives the discharged overhead vapor and adiabatically compresses the received discharged overhead vapor; an evaporator which receives the adiabatically compressed overhead vapor, exchanges heat between water supplied from a water supply source and the compressed overhead vapor and evaporates the water into water vapor; and a second compressor which receives the evaporated water vapor and compresses the received evaporated water vapor. Accordingly, provided herein is a distillation system and distillating method thereof, capable of compressing the overhead vapor before the overhead vapor is introduced into the evaporator, and then increasing the amount of saturated water vapor in the method of generating the saturated water vapor using the condensed latent heat of the compressed overhead vapor, thereby reducing distillation cost.

Systems and processes for heat recovery associated with the separation of hydrocarbon components. Two compressors are used to compress a portion of an overhead vapor stream from a fractionation column. A pressure of the liquid portion of the compressed overhead is reduced and used to recover heat from an overhead of another separation zone having a fractionation column. Once the heat has been recovered the stream is recompressed. The recovered heat may be removed from the recompressed stream in a reboiler of another fractionation column. The fractionation columns may comprise a deethanizer stripper, propane-propylene splitter, and a depropanizer column.

The combination multi-effect distillation and multi-stage flash evaporation system integrates a multi-stage flash (MSF) evaporation system with a multi-effect distillation (MED) system such that the flashing temperature range of the MSF process is shifted upward on the temperature scale, while the MED distillation process operates in the lower temperature range. The multi-stage flash evaporation system includes a plurality of flash evaporation/condensation stages, such that the multi-stage flash evaporation system receives a volume of seawater or brine from an external source and produces distilled water. The multi-effect distillation system includes a plurality of condensation/evaporation effects, such that the multi-effect distillation system receives concentrated brine from the multi-stage flash desalination system and produces distilled water.

A method for comprehensively treating low-concentration ammonia-nitrogen wastewater by completely recycling is disclosed. The low-concentration ammonia-nitrogen wastewater and carbide slag or quick lime are mixed and reacted to obtain a mixed solution containing ammonia water and ammonium chloride. The mixed solution is transferred into an ammonia-water evaporative concentration tower to separate the ammonia water and thus obtain an ammonia vapor and a calcium chloride waste solution. The ammonia vapor is transferred into an ammonia-water cooler, and the calcium chloride waste solution is introduced into an aging pool for aging, and then filtered to obtain a purified calcium chloride solution; and the purified calcium chloride solution is introduced into an MVR triple-effect evaporator for evaporation, so as to obtain distilled water and a concentrated calcium chloride solution. The concentrated calcium chloride solution is introduced into a fluidized bed for spray granulation, so as to obtain an anhydrous calcium chloride product.

The combination multi-effect distillation and multi-stage flash evaporation system integrates a multi-stage flash (MSF) evaporation system with a multi-effect distillation (MED) system such that the flashing temperature range of the MSF process is shifted upward on the temperature scale, while the MED distillation process operates in the lower temperature range. The multi-stage flash evaporation system includes a plurality of flash evaporation/condensation stages, such that the multi-stage flash evaporation system receives a volume of seawater or brine from an external source and produces distilled water. The multi-effect distillation system includes a plurality of condensation/evaporation effects, such that the multi-effect distillation system receives concentrated brine from the multi-stage flash desalination system and produces distilled water.

System and method for concentrating substance-containing fluids by multi-stage evaporation. System includes at least a first and a second evaporator, the first evaporator being connected to the second evaporator, whereby fluid concentrated in the first evaporator is conducted into the second evaporator to further concentrate fluid in the second evaporator, a first mechanically acting compressor unit, whereby vapor formed in the first evaporator is compressed downstream, and a second mechanically acting compressor unit, whereby vapor formed in the second evaporator is compressed downstream. System includes a first supply line supplying vapor compressed with the first mechanically acting compressor unit to the first evaporator. Vapor compressed by the second compressor unit is supplied to the first compressor unit. First and second compressor units include pluralities of compressors and vapor in the second compressor unit is compressed to a larger outlet temperature minus inlet temperature difference than in the first compressor unit.