| 摘要 |
Liquid purifying apparatus in which an infeed chamber, an evaporator chamber and a condenser chamber are arranged in that order along a flow path. A first inflatable bag is interposed across the flow path between the infeed chamber and the evaporator chamber, and a second inflatable bag is interposed across the flow path between the evaporator chamber and the condenser chamber. These bags are respectively located substantially entirely in the evaporator and condenser chambers, and the bags each comprise a flexible layer of highly absorbent fibrous material including a plurality of plies. The liquid to be purified is introduced into the infeed chamber, and it flows into the evaporator chamber to a level such that a portion of the first bag is immersed in the liquid. The liquid spreads by immersion and capillary action over substantially all of the fibers in the first bag to form thin liquid films along the individual fibers. Upon the introduction of air into the infeed chamber and through the first bag to the evaporator chamber, the bag inflates, and the air passes over the individual fibers to vaporize the liquid films. The vapor proceeds through the secong bag into the condenser chamber to inflate the second bag and form the condensate. Previously purified liquid is used to form thin films on the fibers of the second bag to provide an additional evaporation effect and thereby reduce the temperature within the condenser chamber. In some embodiments this cooling action is augmented by directing the residual vapor through a series of perforations in the wall of the condenser chamber in a manner such that a further evaporation effect takes place as the vapor is discharged.
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