WSA Ball-type ATCS have ideal applications on steam surface and overhead condensers, large chiller systems, auxiliary heat exchangers, and often are found in the following:
Power Plants (Fossil, Nuclear, Geothermal, Cogeneration)
District Heating and Cooling Plants
Petrochemical and Refining Plants
This type of ATCS is applied exclusively to condensers and heat exchangers with water tubeside. The Ball type ATCS functions through the creation of a closed loop within the greater circulating water system. Within this closed loop sponge rubber balls are circulated, which by random selection flow through all tubes on a frequent basis, thereby maintaining optimum tubeside cleanliness. The system has one or more of each of the six main components listed below and shown in the accompanying illustration.
Ball recirculation pump
Ball collector vessel
The cleaning balls are introduced and removed from the system through the ball collector. The collector interior is partitioned by a screen into two areas. When the collector is in the ball collection or retention mode the screen separates the collector inlet and outlet. When the screen is positioned such that the inlet and outlet are no longer separated, the balls are conveyed by the flow to the injection site(s). The balls are injected into the cold leg of the circulating cooling water system serving the condenser or heat exchanger so as to achieve a random distribution within the stream. Because the balls (when deaerated) have nearly the same specific gravity as the cooling water, they follow the same path as the water within which they are suspended.
Ball Collector in the open (recirculation) mode. Both the inlet and outlet of the collector are on the same side of the collector screen.
Ball Collector in the collection (ball capture) mode. The screen has been rotated so as to separate the inlet and outlet of the collector.
When the ball charge is correctly sized, each tube is treated by a ball approximately once every five minutes. When the balls have passed through the tubes and enter the cooling water discharge line they are intercepted by the ball strainer(s). When the balls meet the strainer screen they are driven along the screen surface to the ball extraction port located at the point where the down stream extremity of the screen meets the spool body. The balls are then conveyed by a special pump through the ball collector and once again to the injection site.