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GWR for Interphase measurement- Bridal chamber nozzle position

Dear Emerson Expert,

We have equipment called 3 Phase Production Separator (Oil/Water/ Gas phase). Where our sub vendor used other supplier GWR for oil/water interface level transmitter for the high and low level shutdowns. We understand that this will l not work as currently the top bridle connection for the probe type transmitter is in the gas phase. 

As the Bridle connected to side of vessel and top nozzle is located on the gas phase of vessel and the bottom Nozzle of bridle will be flooded with water and no where we can have oil entering the bridle. In this case, how can we ensure that the Probe in the bridle can measure the interface levels.

Request you to have some GWR level expert to have response on the same.

Regards

Suhas

4 Replies

  • Dear Suhas,
    As you state, GWR is typically an excellent solution for interface measurements in separators, but when installing it in a bridle, the bridle design is the limiting factor. Even with both bridle inlet submerged in liquid, the interface level may differ between bridle and main vessel (due to changes in the process conditions) - and our best recommendation / our best practice is thus to install the guided wave radar from a top mounted nozzle (if feasible). In order to guide you further with this particular application, we would appreciate more details about the vessel, such as alternative nozzles, dimensions, etc.
    We have very good experiences of using our guided wave radars on both three phase and two phase separators, with several thousands of units installed on similar applications, so I trust that we can help you to find the best solution also for your vessel.
    Kind regards,
    Ingemar
  • Dear Suhas,
    As you state, GWR is typically an excellent solution for interface measurements in separators, but when installing it in a bridle, the bridle design is the limiting factor. Even with both bridle inlet submerged in liquid, the interface level may differ between bridle and main vessel (due to changes in the process conditions) - and our best recommendation / our best practice is thus to install the guided wave radar from a top mounted nozzle (if feasible). In order to guide you further with this particular application, we would appreciate more details about the vessel, such as alternative nozzles, dimensions, etc.
    We have very good experiences of using our guided wave radars on both three phase and two phase separators, with several thousands of units installed on similar applications, so I trust that we can help you to find the best solution also for your vessel.
    Kind regards,
    Ingemar
  • In reply to Ingemar Serneby:

    Thanks Ingemar,

    As the test separator experience high flowrate of gas inside the vessel, hence we typically chose to go with bridle arrangement for LT's placement. Similarly he oscillation of levels due to incoming fluid, you wont find the stable level zones inside the vessel than in the bridle.

    My basic question is for interphase measurement both nozzles of bridle should be submerged in the vessel liquid level? Currently the top nozzle for interphase bridle is in gas phase.

    Can you share your email Id, I will directly send the vessel GA's to you.

    Regards

    Suhas
  • In reply to suhas.k:

    Hello Suhas,
    You are perfectly right that both inlets need to be submersed in liquid in order to ensure the best conditions for interface measurement. Even though the environment for sure is more stabile within the cage, you will typically seldom have the identical interface level as within the main vessel. The best solution is thus to install the guided wave radar in a still pipe - or use a large coaxial probe, as this solution will provide stabile environment in order to get the products to settle - and with this solution, the guided wave radar will have the absolutly best possibilities to always provide the most accurate level and interface readings. You can either send the details directly to me; Ingemar.serneby@emerson.com or to our support mailbox; RprProductApplicationSupport@emerson.com and we will have a closer look at the best solutions for this vessel. Looking forward to assist you further with this matter!
    Best regards,
    Ingemar