Results 1 to 2 of 2

Thread: Orifice Pressure Drop

  1. #1
    Jan van Heerden - RSA Guest

    Orifice pressure drop

    Hello everybody,

    I am re-designing the pulverized fuel pipelines for one of our coal fired power stations. A coal mill serves 4 pipes and each pipe is connected to one burner. The variations of the solids flow to the 4 burners are quite large.

    We want to balance the flow with orifice plates, but I cannot find a formula for 2-phase flow. I am also looking for a formula to calculate the pressure drop in 2-phase flow across a sudden reduction in the pipe.

    Your help will be appreciated.



  2. Dear Jan,

    If the massflow after your splitter is unbalanced may have different reasons:
    1.) unsufficient flow conditions in front of splitter
    2.) wrong type of splitter (especially for coal feeding)
    3.) unbalanced ductwork after splitter

    If you can eliminate 1.) and/or 2.) at least 3.) remains. You have to adjust massflow into the 4 lines. Orifices in general cause instabilities, better is a additional pressure loss at the end of the line so that this pressure loss is the main loss in the system.
    This can be done by adding nozzles.

    If you want to get more informations, pictures etc. pls. send me an email :
    or visit also our website:
    Best regards
    Klaus Schneider

Similar Threads

  1. pressure drop in hopper
    By Mohan in forum Dust Control & Suppression
    Replies: 1
    Last Post: 5th July 2017, 10:04
  2. Pressure Drop in a t-Junction
    By Erica in forum Pneumatic Conveying
    Replies: 18
    Last Post: 19th January 2016, 17:04
  3. How to Measure a Pressure Drop
    By kchetan in forum Pneumatic Conveying
    Replies: 4
    Last Post: 31st December 2009, 5:33
  4. Pressure Drop Comparison
    By diego.peinado in forum Pneumatic Conveying
    Replies: 3
    Last Post: 20th November 2008, 16:30
  5. Pressure Drop
    By alberto.carrea in forum Pneumatic Conveying
    Replies: 4
    Last Post: 16th December 2004, 5:00

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Single Sign On provided by vBSSO