Common level control systems; it’s best to have diagrams
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Recently, I was working on a lecture manual on level control and needed information on various level control systems used in process industries such as chemical and petrochemical industries. Thank you all for your strong support; currently, the examples provided in some textbooks are still quite limited. It would be best to have technical specifications and operation manuals that provide detailed explanations of the process operating conditions and control requirements; chain protection mechanisms should also be described in detail. Thank you.
This post was last edited by ylb913 on 2018-7-21 07:20. Adjusting the amount of material discharged is likely the most common way to control the liquid level. The situation of controlling the liquid level by adjusting the feed rate also exists ； Level switch: It operates to discharge when the level reaches a certain height (by opening a valve or starting the pump), and to stop discharge when the level drops to a certain level (by closing the valve or stopping the pump) – this is used for controlling the discharge of material, whereas a level switch functions in the opposite way for controlling feed. Cascade control of flow rate and liquid level ； Feed and discharge cascade control ； A U-tube combined with an inverted U-tube is used to maintain stability in the liquid level of the tank ahead ； The liquid level inside the device is kept stable using partitions ； Prevention of excessive liquid level due to overflow ；
If you understand it, the lecture notes are meant to explain things logically; by drawing sketches, you help those listening to understand, and that’s what matters. There’s no need to rely on others for drawing. If you don’t understand, asking you to write lecture notes is really disappointing. . . If you don’t understand, then just stop talking nonsense; don’t say silly things. . . With nothing in the stomach, it’s hard even to pass dry feces, right? :P.