Abstract: The present invention provides a configuration of a multi-stage flash desalination system including a thermal vapor compressor and a condensate flash tank, which allows to extract a vapor from the condensate before it is returned to the power plant and to compress this vapor and use it as part of the heating steam in the brine heater, which reduces the required amount of steam supply from the power plant, while the condensate returned to the power plant at a reduced temperature allows to utilize low grade heat of exhaust gases of a steam generator to re-heat the condensate, which results in a reduced energy consumption allocated to the multi-stage flash desalination plant and an improvement of the energy efficiency of the power plant.

Abstract: The present invention provides a configuration of a multi stage flash cross tube evaporator wherein flash stages are arranged in a plurality of at least two tiers with a first flash stage to which a heated solution is fed, a plurality of intermediate flash stages and a last flash stage from which the concentrated solution is discharged in each tier, wherein the flash stages in each tier are in a serial flow communication and the flash stages of each tier are in parallel flow communication to the flash stages in the other tier(s). Such configuration allows to minimize the size of the tube bundles, flash stages and evaporator shell and consequently minimizing evaporator weight and cost.

Abstract: The present invention provides a configuration of a multi stage flash cross tube evaporator comprising a plurality of at least two tiers, wherein each tier comprises a first flash stage a plurality of intermediate flash stages and a last flash stage, wherein the flash stages in each tier are configured in a serial flow communication and the flash stages of each tier are configured to be in parallel flow communication to the flash stages in the other tier(s). Such configuration allows to reduce the size of the tube bundles, flash stages and evaporator shell compared to multi stage flash cross tube evaporators of prior art. With the resulting reduced evaporator weight and reduced foot print the cost of an evaporator and other related cost can be reduced.

Abstract: The present invention provides a multi stage flash long tube evaporator with flash stages arranged in a plurality of at least three tiers, wherein each tier is divided into a plurality of at least two flash stages and a plurality of at least three tube bundles are arranged in parallel and in a longitudinal direction in each tier. This configuration allows to minimize the evaporator shell volume, shell surface, foot print and weight, minimizing the cost of an evaporator and other related plant cost. This configuration is in particular suitable for large evaporator unit capacities.

Abstract: The present invention provides tube bundle configurations for multi stage flash cross tube type evaporators using concepts with parallel and counter current coolant flow. Those tube bundle configurations allow to build the evaporators more compact and provide the possibilities to lower the thermal and electrical energy consumption for a multi stage flash desalination plant by maintaining or reducing the distilled water generation cost as achievable with cross tube evaporators utilizing single pass tube bundles in serial flow communication.

Abstract: The present invention provides a configuration of a multi stage flash long tube evaporator with flash stages arranged in a plurality of at least three tiers, each tier comprises a plurality of at least two flash stages and a plurality of at least three parallel arranged tube bundles. This configuration allows to minimize the evaporator shell volume, shell surface, foot print and weight, minimizing the cost of an evaporator and other related plant cost. This configuration is in particular suitable for medium to large evaporator unit capacities allowing to be expanded to any desired capacities.

Abstract: The present invention provides tube bundle configurations for multi stage flash cross tube type evaporators using concepts with parallel and counter current coolant flow. Those tube bundle configurations allow to build the evaporators more compact and provide the possibilities to lower the thermal and electrical energy consumption for a multi stage flash desalination plant by maintaining or reducing the distilled water generation cost as achievable with cross tube evaporators utilizing single pass tube bundles in serial flow communication.