Automation control system for tank farm
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Dear experts, I have a question. Why do the design institutes specify that the transfer pumps in hazardous chemical tank farms should stop operating when the liquid level is low, but do not include any provisions for automatic restarting of these pumps? In cases where materials need to be transferred to a workshop, when the liquid level in the intermediate tank there drops too low, it would be ideal if the transfer pumps in the tank farm could start automatically. Could the experts please explain whether there are any relevant design standards for this?
To control this device, one must first install the instruments and interlocks required by the standards; the focus should be on designing appropriate process and safety interlocks based on your specific needs. To supply material to the workshop, when the liquid level in the intermediate tank there is low, the feeding pump in the tank area starts automatically. When a material is sent to various workshops, this process can be chaotic and risky, and measurement will also become inaccurate. Typically, this material distribution scheme involves distributing materials in batches manually; once the distribution is complete, the pump stops automatically and the feed isolation valve for the corresponding workshop is closed. The feed isolation valves for different workshops are interlocked, meaning that material can only be supplied to one workshop at a time. At most one isolation valve can be opened during the material distribution process. In the event of any manual error, the pump stops automatically.