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Questions about mixing on the orifice plate

  1. May 7, 2009 #1
    Hello all

    this is Bashir again ...i have some questions regarding the orfice plat design..i would like to ask you a couple of questions:
    I am doing some work with water treatment.. i am adding some chemicals for coagulation and flocculation but the thing is i am not getting a very good flocculation ( i am getting a poor flocculation at the moment ) so i was thinking of making some modification ( contact time ) to all the flocs some more time to form.. in order to achieve that i am planning of adding a Spiral hose pipe of a specific lenght...
    My questions are:

    1- How could make the right design of an orifice plat ?

    2- My pipe is 25mm diameter.. What should the orifice diameter should be ? and why ? what is the parameter that i should take them into consideration ?

    3- I heard of the mixing energy or velocity gradient (G) in the oriffice plat folowing by a spiral pipe... How can i calculate it ?

    4- How should i know which value of G that will give me a good flocculation ( good mixing )?

    5- Is there any formula of calculation the G at a spiral pipe ?

    6- How should i know the diameter and the length of the spiral pipe i must use

    I really was looking for some infromation from the internet but i could not get anything useful yet and that is why i decided to email you my questions.

    So please if you are able to answer me please do

    I am looking forward to hear from you

    Regards
     
  2. jcsd
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