Abstract ▼ AI-Helper

This paper aims to investigate the pressure variation of a back-washing filter inside a ballast by using the flow rate control and turns out that the method we suggested would be a good alternation preventing abrupt shutdown in field operation. In the first experiment, when the flow rate was set to ...

This paper aims to investigate the pressure variation of a back-washing filter inside a ballast by using the flow rate control and turns out that the method we suggested would be a good alternation preventing abrupt shutdown in field operation. In the first experiment, when the flow rate was set to 250, the shutdown was observed around 12 mins. In the second, after making the back-washing in the filter, the experiment was made with the flow rate of 150 having other conditions equivalent. In the result, the shutdown did not occur in one hour and 20 mins, which was the complete testing time. While the final experiment was made in the variable flow rate from 250 to 150 with a step of -50, the result of a saw-tooth type signal pattern, which consisted of the linear increase of filtering process and sudden drop in the back-washing process, did not show a shutdown, either.
Finally, it is concluded that regarding field applications, the system shutdown is likely to occur due to blocking the filter by suspended solids and particles (i.e., the clogging phenomenon), but if the (smart) control of flow rate is applied in each critical pressure value (i.e., we call this the critical slope of pressure difference), then this approach can be beneficial in preventing substantial damage and operating cost.

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