Without further ado, here is the P&ID DWG file. Seeking everyone's opinions on instruments.
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As shown in the figure, the objectives are as follows: 1. When the temperature and pressure in the reactor reach the high-high (HH) alarm level, the safety instrument system activates, shutting off valve group No. 1, closing valve No. 3, and opening the cold ethylene glycol valve No. 4. 2. During normal operation, the DCS system is active and automatically controls Valve No. 2 and Valve No. 5 based on the temperature and pressure in the reactor. (A interlock between the flow meter and control valve No. 5 is provided to prevent excessive local temperatures caused by high flow rates.) (There is a DCS control panel on site, which is also connected to the control room.) Note: This is my first time drawing such diagrams; I am seeking advice and assistance from everyone here. I hope the experts can help me out. Wish everyone a happy New Year, success in their work, and great prosperity in the Year of the Ox
The control valve is also equipped with a solenoid valve; it shouldn’t be drawn this way.
The legends in SH/T3107 and HG/T20505 are both like this, so that’s how it is. Does that mean no solenoid valve at all?
:Lol, are there any other problems? I don’t think it should look like this, with so many spiderwebs all over it
If it only serves a regulating function, there is no need to include a solenoid valve. Draw the signal lines for the control loop; it’s not necessary to connect as many lines in the interlock loop. Draw diamond diagrams at the interlocked valves to show the interlock numbers, which will make the diagram much simpler.
If there are kind teachers who are willing to help with the revisions, you can reply by sending a screenshot, or send it to my QQ email at 523870041@qq.com, or add me on WeChat at 19524752397. Let’s learn from each other and improve together
By the way, for interlock tag numbers like Sa, Da, G, can we use whatever letters we want, or are there standard requirements?