Water distillation system and method with controls
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United States of America Patent
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Jun 4, 1991
Grant Date -
N/A
app pub date -
Feb 25, 1988
filing date -
Feb 25, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A control for a water distillation apparatus admits untreated feed water to the boiling tank in response to a demand for the production of distilled water and operates the heater to produce steam. Level probes in the boiling tank monitors the level of untreated water in the boiling tank and admits more feed water as necessary. When demand for production of distilled water has ceased, the heater is deenergized and the boiling tank is filled to dilute the residual water in the tank and lower its temperature prior to drainage to prevent damage to a plastic house drain. In a preferred embodiment, feed water is admitted to the boiling tank in large batches and the production of distilled water continues uninterrupted until the entire batch is distilled to conserve heat energy even if demand ceases during such batch distillation. A cleaning mode is provided to remove scale from the interior of the boiling tank with a simplified manual cleaning procedure. A steam cleaning mode for the distilled water holding tank is self-terminating to avoid damage to the outlet pump.
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