<body><script type="text/javascript"> function setAttributeOnload(object, attribute, val) { if(window.addEventListener) { window.addEventListener('load', function(){ object[attribute] = val; }, false); } else { window.attachEvent('onload', function(){ object[attribute] = val; }); } } </script> <div id="navbar-iframe-container"></div> <script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script> <script type="text/javascript"> gapi.load("gapi.iframes:gapi.iframes.style.bubble", function() { if (gapi.iframes && gapi.iframes.getContext) { gapi.iframes.getContext().openChild({ url: 'https://www.blogger.com/navbar.g?targetBlogID\x3d8968604820003269863\x26blogName\x3dChemical+%26+Process+Technology\x26publishMode\x3dPUBLISH_MODE_BLOGSPOT\x26navbarType\x3dBLUE\x26layoutType\x3dCLASSIC\x26searchRoot\x3dhttp://webwormcpt.blogspot.com/search\x26blogLocale\x3den\x26v\x3d2\x26homepageUrl\x3dhttp://webwormcpt.blogspot.com/\x26vt\x3d6402931565399164945', where: document.getElementById("navbar-iframe-container"), id: "navbar-iframe" }); } }); </script>

Chemical Process Technology

Continue to learn tips, knowledge and experience about Chemical Process Technology...

Enter your email address:


CLOSE WINDOW


 

Chemical & Process Technology

A place to share knowledge, lesson learnt...

Saturday, October 4, 2008

Display problem ? Click HERE

Recommended :
Subscribe FREE - Processing Magazine

A gas liquid separator is used for bulk separation and mist eliminator i.e. vane type, mesh type, cyclone type) are used to promote liquid drop coalescence and separation from gas. Souder-Brown equation has been widely used in Oil and gas industry to size a gas liquid separator with and without mist eliminator.

Generally the K factor as proposed in GPSA has been used by many engineers. Following figure tabulate the K factor may be used for horizontal, vertical, vertical scrubber and others separator for special services.






On the other hand, there are no indication of the liquid droplet size can be removed. The following is intended to studies the limiting droplet size based on the K factor used for horizontal, vertical and vertical scrubber. In some event, it may be a useful information especially when there is droplet size limitation of downstream equipment i.e compressor.

For a droplet in free fall (gravity action), the droplet terminal velocity is as follow :



By arranging in the Souders-Brown equation :



And the K factor is as follow :



The drag coefficient (C') can be read from the following figure.


(Click to view large image)

where Re is Reynolds number as follow :


Basis
For a vapor and liquid with the following condition and properties :
  • Pressure = Atmosphere
  • Temperature = 40 degC
  • Molecular Weight = 20-40
  • Compressibility factor = 0.9
  • Liquid density = 500 - 850 kg/m3
  • K factor for horizontal separator is 0.06 -0.075 m/s
  • K factor for vertical separator is 0.025-0.055 m/s
  • K factor for vertical scrubber is 0.018 -0.039 m/s
Results
The limiting liquid droplet size are

Horizontal separator without mist eliminator : 350 -540 micron
Vertical separator without mist eliminator : 160 -400 micron
Vertical scrubber without mist eliminator : 125-290 micron


Related Topic

Labels: ,

posted by Webworm, 1:39 PM

0 Comments:

Post a Comment

Let us know your opinion !!! You can use some HTML tags, such as  <b>, <i>, <a>

Subscribe to Post Comments [Atom]

Links to this post:

Create a Link

Home:

<< Home