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[Doneisbetterthenperfect]

Hello, I am a college student dreaming of finding a job in the plant engineering field.

 

I found this community while Googling, and I have some questions, so I'm leaving a question.

 

Currently, I am working with my colleagues to create a P&ID for an offshore natural gas plant.

Of course, it's not something you actually get paid to do, but with colleagues who have the same dream, 'Let's work as if we were really getting paid!' That's why we're doing this.

 

 

 

To explain our process, gas from the well passes through a choke valve and separates the condensate in a 3-phase separator. After passing, it passes through the TEG contactor to lower the water dew point and then passes through the J-T valve to lower the HC dew point. Afterwards, it passes through the Compressor KO drum and then through the compressor to adjust the pressure to the buyer's spec. Afterwards, it passes the metering package.

 

But currently, we stuck with these following problem 

 

First, we can't know how to determine whether the choke valve used to lower the well pressure (250 barg) to operating pressure (100 barg) is control or manual. I searched on Google with the keyword "natural gas inlet processing pfd", but I couldn't figure out how to control the choke valve. It just tells you to use it according to the requirements of each system. When the choke vavle is controller-operated, it has high accuracy and is used in hazrdous or hard-to-reach locations, and the manual version is cheap and easy to maintain.

  Our well is assumed to have a constant flow rate without any change in pressure during the operating period.

 

Second, where should the control valve and pressure controller be installed to prevent gas from escaping when starting up the final metering system down stream?

  This is to prevent the compressor from shutting down if the pressure is not controlled when restarting the plant after maintance.

Gas from well is sweet gas, and steady flow during operation.
 

Can we get answers to these questions?
 

Thank you for reading this!!!