Can online detection of liquid concentration be used to achieve proportional control with the feed flow rate?
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Can the online concentration detector on the mixing tank be used to achieve fixed-value control in conjunction with the water inlet flow rate? Will this allow a connection?
It is theoretically feasible, but in practice the control effect may not be satisfactory or it may not be possible to implement it. This is because the concentration analyzer takes a long time from sampling to producing a measurement result, while the flow control time constant is very short. By the time a concentration change is detected, it is already delayed, and any further adjustment will result in a significant change. And when the time constant of the control channel is small, changes in flow rate require the analyzer to detect them again, resulting in a delay. Therefore, conventional control schemes will not achieve good control performance.
The online Raman detection time is very short; data can be obtained in 5-10 seconds
With an online density analyzer, the signal can be directly used for interlocking – for example, the Shuaike SC65 model used in desulfurization tanks; it’s extremely useful, just like when I pee – powerful and accurate flow, high reliability with no false alarms, not a single drop left outside the toilet :lol