For a batch mixing tank with continuous feeding, how to ensure accurate concentration ratios
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It’s a mixing tank with a capacity of around 10 cubic meters, equipped with a stirrer. The process materials flow into the tank continuously, and the concentration within the tank is controlled by adjusting the flow rate of the incoming water. I would like to know how to ensure accurate control of the ingredient concentration; is it possible to achieve this by using concentration analysis on the storage tank in combination with fixed-value control based on the water flow rate? There must be some other better method; in the design of the process, all conditions can be changed, except for the feed rate.
If remote measurement is available in all cases, it is sufficient to set the proportion directly on the DCS; concentration analysis can serve as a monitoring parameter rather than a control parameter.
One of these streams can only flow by gravity; it is not possible to regulate its flow using valves. Since solid substances are precipitated, it can only be prepared in the storage tank
It is possible to control the water inflow using concentration levels; paper mills have always done this.