For wastewater treatment, alkali is used to adjust the pH to achieve neutralization and precipitation – what is a safe and reliable way to implement automatic control for this process? Urgent! Urgent! Urgent! ! !
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For wastewater treatment, alkali is used to adjust the pH to achieve neutralization and precipitation – what is a safe and reliable way to implement automatic control for this process? Urgent! Urgent! Urgent! ! ! The main concerns relate to the interlock between the pH meter and the alkali addition pump: 1) whether the pH meter will experience delays, 2) the accuracy of pH measurements in such an environment, and 3) whether there will be delays in controlling the amount of chemical added. For example, even if it is detected that the pH level is already too high and the amount of chemical added is reduced immediately, the pH level may still continue to rise for some time due to these delays. How can this be designed to avoid such situations? How many pH meters should we install? After all, only one point is measured – can it represent the whole?
It can be adjusted through control methods: (but the pump must be equipped with an inverter, or there must be control valves on the inlet pipeline)； For example, if PH needs to be controlled at 8 ； In terms of control methods, the pump frequency or valve opening can be adjusted to lower values when the pH reaches around 7.5 ； In this case, using a smaller amount makes it easier to control ；
So, sir, in such situations, is it easy for pH meters to get damaged, due to scaling on their surfaces and things like that? Are there any good methods to avoid delays and inaccuracies in measurements?
Timely and accurate adjustment can be achieved through online PH monitoring and pipeline control systems; as long as the process pipelines are properly configured, dual-loop control can be used if necessary. If you have a conditional diagram, I can help you design it.