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US 4,266,601 AGranted
Heat exchanger for contaminated water
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorJack L. Jenkins
Life of this patent
Estimating the term…
Abstract
A heat exchanger for cooling contaminated liquids causing precipitation of olid matter on cold walls. Waste water at high temperature containing contaminants in the form of sludge and in solution is pumped through the annular space between two concentric cylindrical tanks. Cooling water is circulated through the tanks on either side of the annular space while scraping devices rotate about the annular space preventing buildup of precipitate on the annular space walls.
Claims7
A heat exchanger comprising:
- (a) a large cylindrical tank open at the top to ambient pressure, said tank having a base and a first hollow region concentric about the longitudinal axis of said tank, a first annular structure concentric about said first hollow region, a second hollow region concentric about said first annular structure and a second annular structure concentric about said second hollow region, said second hollow region having an inner wall formed by the outer surface of said first annular structure and an outer wall formed by the inner surface of said second annular structure;
- (b) means for introducing a contaminated liquid medium to be cooled into said second hollow region;
- (c) means for removing said liquid medium from said second hollow region;
- (d) means for injecting a cooling medium under selectively variable pressure into said first and said second annular structures such that a selectively variable cooling rate of said inner and said outer walls of said second hollow region is obtained;
- (e) means for extracting said cooling medium from said first and said second annular structures;
- (f) means for brushing continuously said inner and said outer walls of said second hollow region;
- and
- (g) means for filtering said cooled contaminated liquid medium.
5 more elements
Dependencies are inferred from the claim text.