Heat exchange – With first fluid holder or collector open to second fluid
Patent
1987-03-10
1989-02-21
Bascomb, Wilbur
Heat exchange
With first fluid holder or collector open to second fluid
165903, 2021851, 2021855, 203 10, B01D 342, F28B 106
Patent
active
048056928
ABSTRACT:
A distillation type of water purification system has a raw water inlet valve for admitting raw water continuously to a boiling tank at a rate greater than the rate at which raw water is converted to treated water. A drain valve located at the bottom of the boiling tank is energized by a raw water level sensing means whenever the raw water level reaches a predetermined level, to discharge water from the boiling tank. Treated water is stored in a storage tank having a pump for discharging treated water to the user upon demand. A single conductivity sensor in the storage tank controls the pump to allow it to operate only if the sensed conductivity is above a first predetermined value but not at or above a second predetermined value greater than the first value. An improved condenser has two sets of tubes, each set is arranged in a pair of planes oriented transverse the flow of cooling air with the tubes parallel. The internal cross-sectional area of one set is about twice that of the other. Steam and condensate flows serially through the larger diameter tubes and then through the smaller diameter tubes in a flow countercurrent to the cooling air stream.
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Palmer David G.
Vacha Keith L.
Bascomb Wilbur
Pure Water, Inc.
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