Abstract
The characteristics of sludge generated in the process of producing drinking water are closely related to the water purification process. However, sludge discharge and treatment facilities often tend to be treated as separate issues from the water purification process. The sludge accumulated inside the hopper is often not sufficiently discharged when the sludge draw-off valve is opened, and improvement studies have been conducted. In this study, the discharge flow characteristics of draw-off valves such as a gate valve, a full ball valve, and a segment ball valve have been predicted according to the opening degree by numerical methods, and the discharge flow characteristics have been analyzed for the actual valve operation time. Based on the method of the design of experiments, tests have been conducted for various valve operating conditions to find the optimal operating conditions, and the improvement effect has been analyzed through repeated tests in a water purification plant.
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