Filter Tank Report

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The aim of this report is to provide some insight into the improvements that can be made to an existing system. The first problem is the loss of treated and heated water due to the poor flow and level control in the filter tank. Increasing the size of the filter tank will help solve this problem, this will allow more water to be held in the filter tank during peak hours, and when the patrons leave this water will be pumped back into the main tank. Controlling the flow coming into the filter tank, and matching it to the flow leaving the filter tank, this will ensure that both tanks return to their proper operating levels and reduce the risk of them overflowing. This will be accomplished by limiting the flow on the main drain line, to a percentage of the flow leaving the filter tank. This will require the use of flow measurement, a control valve, and a PLC. The level in the filter tank will be controlled by level switches that dictate whether the skimmer line valve …show more content…
ACT Aquatic center uses chlorine gas, this is how it is added to the water. Water is drawn off the main pump discharge by a small booster pump, this pump then sends the water to the chlorine room, where chlorine is then injected into the stream and sent back to the main pipe run. The chlorine flow is regulated by a rotameter which is calibrated for chlorine. To prevent constantly feeding chlorine there are solenoid valves on either side of the chlorine gas injection point that open and close when the booster pump turns on and off. Due to the long lag times associated with chemical mixing in pools, the control scheme must be on/off, and a 20-minute lockout will be programmed into the PLC to allow the water to properly mix before adding more chlorine. The figures below show the booster pump, the chlorinator, the rotameter, and the injection

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