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Recent Developments in Automatic Cleaning of Storage Tanks¹

Girton Manufacturing Company, Millville, Pennsylvania

ABSTRACT

Automatic cleaning means mechanical cleaning. When successful mechanical cleaning is being done it is possible, by instrumentation and control, to automatize the cleaning system to any desired degree. Different ideas seem to exist as to what sanitation means as it applies to dairy equipment. In this discussion we mean a tank that is clean as demanded by all sanitary standards. Several devices have been used to clean storage tanks by mechanical methods. We shall examine these devices and see how each one is supposed to operate.

EQUIPMENT

Spray balls. More spray balls have been installed in storage tanks than any other device. Some have been installed as a permanent part of tank equipment. Others have been designed to be placed in the tank when the cleaning operation is started. Both types of spray balls are expected to do the same cleaning job, so they will be grouped together. These spray balls have been placed on piping extending down from the top of the tanks, on horizontal piping welded to the tank liner, and on piping that rests on supports standing on the bottom of the tank.

¹ Presented at Seventh Annual National Dairy Engineering Conference, Michigan State University, East Lansing, February 26–27, 1959.