Heat exchange – With protector or protective agent
Patent
1994-09-02
1996-05-14
Flanigan, Allen J.
Heat exchange
With protector or protective agent
204196, F28F 1900
Patent
active
055159133
ABSTRACT:
An anodically protected shell and tube heat exchanger for exchange of heat between a heat transfer fluid in the tubes and a corrosive liquid in the shell. A first anodic protection circuit at one end of the shell comprises a first elongate cathode that extends parallel to the tubes, is spaced laterally therefrom, and is in electrical contact with the corrosive liquid in a first zone between the tube sheet at the one end and a location spaced from the tube sheet at the other end. A second anodic protection circuit at the other end of the shell comprises a second elongate cathode that extends parallel to the tubes, is spaced laterally therefrom, and is in electrical contact with the corrosive liquid in a second zone between the tube sheet at the other end of the shell and a location spaced from the tube sheet at the one end. The conductive surface of the second cathode in contact with the corrosive liquid is spaced sufficiently from the conductive surface of the first cathode in contact with the corrosive liquid so that the operations of the anodic protection circuits do not interfere with one another.
REFERENCES:
patent: 1020480 (1912-03-01), Cumberland
patent: 4437957 (1984-03-01), Freeman
patent: 4588022 (1986-05-01), Sanz
patent: 4689127 (1987-08-01), McAlister
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