Multi effect distiller with falling film evaporator and condenser cells
OwnerPeter Feherinventor
Life of this patent
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Abstract
Multi Effect Distiller (MED) with vertical flat-plate, falling-film heat transfer mechanism. A multitude of alternatively arranged or “checkered”, rectangular shaped evaporator and condenser cells form one layer between two vertical flat plate walls. Multitude of layers—each comprised of alternating evaporator and condenser cells—form the block-shaped MED unit. The evaporator and condenser cells are against each other, sharing common vertical heat transfer walls. The simultaneous propagation of multi effect distillation occurs in two dimensions along the longitudinal vertical plane of the heat exchanger. One end of the distiller is heated, while the other end is cooled.
Claims10
The multi effect distiller with falling-film heat transfer mechanism, wherein a multitude of alternatively arranged, rectangular shaped evaporator and condenser cells form a checkered pattern in one layer between two vertical flat plate walls and wherein the evaporator and condenser cells in adjacent layers are also alternatively arranged in an evaporator-condenser-evaporator etc. manner and wherein the evaporator and condenser cells are arranged against each other, sharing common vertical heat transfer walls and wherein a multitude of vertical layers form a block-shaped distiller unit and wherein the vertical stacks of alternating evaporator condenser cells form columns and the horizontal stacks of alternating cells form rows.
The flow pattern of solution wherein the solution flows from top to bottom by gravitation as falling film through multitude of subsequent evaporator cells by alternatively channeling the liquid flow through collection and transfer troughs to the evaporator cells into the adjacent layers and wherein the solution enters into a top evaporator cell and flows down on the walls as thin liquid film to the bottom of the cell and wherein the liquid solution flows from the bottom of the evaporator cell to the top of the two evaporator cells located below in the adjacent layers on each side of the top evaporator cell.
The flow pattern of vapor wherein the vapor generated in each evaporator cell is divided in two and wherein one portion of the vapor passes downwards through the separator cap into the condenser cell below and wherein the other portion of the vapor passes horizontally through the cell separator wall openings to the adjacent condenser cell towards the cold end of the distiller.
The flow pattern of collection of the liquid concentrate output wherein the concentrate reaches the lowest evaporator cells wherein the concentrate is collected in the bottom collection pan of the distiller apparatus.
The direct contact condenser cooling of the multi effect evaporator wherein all or portion of the cells of the cold end column are condenser cells and wherein these condenser cells are connected to the distilled liquid loop as a source of cooling and wherein some or all of the condenser cells are sprayed internally by means of nozzles spraying the internal space of the condenser-cells with cooled distilled liquid and wherein the vapors entering the condenser are in direct contact with the liquid droplets of the distilled liquid and wherein the direct contact of vapor and liquid is the main means of condensation and wherein the sprayed cooling liquid has the same chemical composition as the condensing vapor.
Dependencies are inferred from the claim text.