An evaporator and condenser unit for use in distilling a liquid, such as water, includes a rotary heat exchanger plate having a plurality of folds or pleats. Adjacent panels of the folded plate define spaces between their oppositely facing surfaces, and these spaces are alternatingly configured as e
An evaporator and condenser unit for use in distilling a liquid, such as water, includes a rotary heat exchanger plate having a plurality of folds or pleats. Adjacent panels of the folded plate define spaces between their oppositely facing surfaces, and these spaces are alternatingly configured as evaporating and condensing chambers. The evaporating chambers, moreover, are defined between adjacent panels that are joined at an outer diameter fold, while the condensing chambers are defined between adjacent panels that are joined at an inner diameter fold. The evaporating chambers are thus closed at their outer diameter ends and open at their inner diameter ends, while the condensing chambers are closed at their inner diameter ends and open at their outer diameter ends.
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1. An evaporator and condenser unit for use in distilling a liquid, the evaporator and condenser unit comprising:a housing having an inlet, an outlet, and a lower portion defining a sump for containing the liquid to be distilled; a heat exchanger plate disposed within the housing and configured for
1. An evaporator and condenser unit for use in distilling a liquid, the evaporator and condenser unit comprising:a housing having an inlet, an outlet, and a lower portion defining a sump for containing the liquid to be distilled; a heat exchanger plate disposed within the housing and configured for rotation about an axis, the heat exchanger plate having a plurality of folds and two opposing edges that are joined together so as to give the folded plate a generally circular shape, the folds defining a plurality of spaced-apart panels having corresponding surfaces that define alternating evaporating and condensing chambers between opposing panel surfaces; an upper end plate and a lower end plate disposed within the housing substantially perpendicular to the axis of rotation; a liquid-pick-up mechanism configured to draw liquid from the sump and deliver it to the inner edges of the evaporating chambers; a sleeve enclosing the folded heat exchanger plate at least at its outer edges, the sleeve defining a condensate collection space proximate to the folded heat exchanger plate opposite the sump, and at least one stationary scoop tube extending through the housing and into the condensate collection space, the at least one stationary scoop tube having an opening in the condensate collection space, wherein; the folded heat exchanger plate is mounted between the upper and lower end plates so as to seal the evaporating chambers from the condensing chambers, the evaporating and condensing chambers include inner and outer edges relative to the axis of rotation, the evaporating chambers are closed at their outer edges by corresponding folds in the heat exchanger plate, are open at their inner edges, and are in fluid communication with the outlet so as to provide vapor thereto, the condensing chambers are open at their outer edges, are closed at their inner edges by corresponding folds in the heat exchanger plate, and are in fluid communication with the inlet so as to receive vapor therefrom; the upper end plate has one or more ports disposed proximate to an outer diameter edge of the upper end plate, the one or more ports providing fluid communication between the condensing chambers and the condensate collection space, and the at least one stationary scoop tube is configured to remove condensate that collects in the condensate collection space. 2. The evaporator and condenser unit of claim 1 wherein the folds of the heat exchanger plate are substantially co-planar with the axis of rotation.3. An evaporator and condenser unit for use in distilling a liquid, the evaporator and condenser unit comprising:a housing having an inlet, an outlet, and a lower portion defining a sump for containing the liquid to be distilled; a heat exchanger plate disposed within the housing and configured for rotation about an axis, the heat exchanger plate having a plurality of folds and two opposing edges that are joined together so as to give the folded plate a generally circular shape, the folds defining a plurality of spaced-apart panels having corresponding surfaces that define alternating evaporating and condensing chambers between opposing panel surfaces; an upper end plate and a lower end plate disposed within the housing substantially perpendicular to the axis of rotation; a liquid pick-up mechanism configured to draw liquid from the sump and deliver it to the inner edges of the evaporating chambers; a sleeve enclosing the folded heat exchanger plate at least at its outer edges, the sleeve defining a side wall facing the axis of rotation, the sleeve configured such that the side wall traps condensate generated within the condensing chambers; and a seal ring extending around the outer end of the folded heat exchanger plate between the lower end plate and the sleeve, the seal ring configured to permit fluid communication between the evaporating chambers and the sump, but blocking fluid communication between the condensing chambers and the sump, wherein: the folded heat exchanger plate is mounted between the upper and lower end plates so as to seal the evaporating chambers front the condensing chambers, the evaporating and condensing chambers include inner and outer edges relative to the axis of rotation, the evaporating chambers are closed at their outer edges by corresponding folds in the heat exchanger plate, are open at their inner edges, and are in fluid communication with the outlet so as to provide vapor thereto, and the condensing chambers are open at their outer edges, are closed at their inner edges by corresponding folds in the heat exchanger plate, and are in fluid communication with the inlet so as to receive vapor therefrom. 4. The evaporator and condenser unit of claim 3 further comprising a catch basin disposed in spaced-apart relation about the sealed outer edge of at least one evaporating chamber, the catch basin extending radially inward relative to the axis of rotation a selected distance, and being open in the direction of the axis of rotation.5. The evaporator and condenser unit of claim 4 wherein a catch basin is disposed about the sealed outer edge of each evaporating chamber.6. The evaporator and condenser unit of claim 3 wherein the folds of the heat exchanger plate are substantially co-planar with the axis of rotation.7. An evaporator and condenser unit for use in distilling a liquid, the evaporator and condenser unit comprising:a housing having an inlet, an outlet, and a lower portion defining a sump for containing the liquid to be distilled; a heat exchanger plate disposed within the housing and configured for rotation about an axis, the heat exchanger plate having a plurality of folds and two opposing edges that are joined together so as to give the folded plate a generally circular shape, the folds defining a plurality of spaced-apart panels having corresponding surfaces that define alternating evaporating and condensing chambers between opposing panel surfaces, an upper end plate and a lower end plate disposed within the housing substantially perpendicular to the axis of rotation; and a liquid pick-up mechanism configured to draw liquid from the sump and deliver it to the inner edges of the evaporating chambers, wherein the folded heat exchanger plate is mounted between the upper and lower end plates so as to seal the evaporating chambers from the condensing chambers, the evaporating and condensing chambers include inner and outer edges relative to the axis of rotation, the evaporating chambers are closed at their outer edges by corresponding folds in the heat exchanger plate, are open at their inner edges, and are in fluid communication with the outlet so as to provide vapor thereto, and the condensing chambers are open at their outer edges, are closed at their inner edges by corresponding folds in the heat exchanger plate, and are in fluid communication with the inlet so as to receive vapor therefrom. 8. The evaporator and condenser unit of claim 7 wherein the folds of the heat exchanger plate are substantially co-planar with the axis of rotation.9. An evaporator and condenser unit for use in distilling a liquid, the evaporator and condenser unit comprising:a housing having an inlet, an outlet, and a lower portion defining a sump for containing the liquid to be distilled; a heat exchanger plate disposed within the housing and configured for rotation about an axis, the heat exchanger plate having a plurality of folds and two opposing edges that are joined together so as to give the folded plate a generally circular shape, the folds defining a plurality of spaced-apart panels having corresponding surfaces that define alternating evaporating and condensing chambers between opposing panel surfaces; an upper end plate and a lower end plate disposed within the housing substantially perpendicular to the axis of rotation; a rotating element extending at least partially within the sump and including a wall configured to pick-up liquid from the sump; and a first stationary scoop tube having an open end disposed near the wall of the rotating element and a section disposed proximate to the inner edges of the folded heat exchanger plate, the section having means for discharging liquid from the sump, wherein; the folded heat exchanger plate is mounted between the upper and lower end plates so as to seal the evaporating chambers from the condensing chambers, the evaporating and condensing chambers include inner and outer edges relative to the axis of rotation, the evaporating chambers are closed at their outer edges by corresponding folds in the heat exchanger plate, are open at their inner edges, and are in fluid communication with the outlet so as to provide vapor thereto, and the condensing chambers are open at their outer edges, are closed at their inner edges by corresponding folds in the heat exchanger plate, and are in fluid communication with the inlet so as to receive vapor therefrom. 10. The evaporator and condenser unit of claim 9 wherein the section of the tube extends substantially along the axis of rotation and the means for discharging liquid is configured such that liquid enters the evaporating chambers which are open at their inner edges.11. The evaporator and condenser unit of claim 9 wherein the folds of the heat exchanger plate are substantially co-planar with the axis of rotation.
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