Comments on: Going Round The Bend http://blog.bulk-online.com/general/going-round-the-bend.html A weblog for the worldwide powder and bulk solids handling and processing community. Fri, 07 Oct 2011 14:26:35 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: raju http://blog.bulk-online.com/general/going-round-the-bend.html/comment-page-1#comment-39233 raju Thu, 17 Mar 2011 06:49:49 +0000 http://www.bulk-online.com/blog/?p=7#comment-39233 dear sir, i am raju project engineer/india in ash handling systems,i have an problem in pnuematic conveying of fly ash.can you you please send excel sheet calculation to calculate pressure drop in both horizantal and vertical pipes. plase help me in this regard thanking you sir, yours sincerely raju engineer,india cell no 9490368246 battu_cmraju@yahoo.com dear sir,
i am raju project engineer/india in ash handling systems,i have an problem in pnuematic conveying of fly ash.can you you please send excel sheet calculation to calculate pressure drop in both horizantal and vertical pipes.
plase help me in this regard thanking you sir,
yours sincerely
raju
engineer,india
cell no 9490368246
battu_cmraju@yahoo.com

]]> By: Les Dunn http://blog.bulk-online.com/general/going-round-the-bend.html/comment-page-1#comment-82 Les Dunn Fri, 09 Nov 2007 05:51:02 +0000 http://www.bulk-online.com/blog/?p=7#comment-82 I have tried certain mechanical means and hydraulic means to reduce the wear at bend/deviations when we used steel pipe & plastic pipes to convey sand slurry during dredging operations. Initially, we used to turned the piping 90 degrees during the working life of the dredging operations to get even wear from the pipe internals and 'Rock Boxes' at the deviation points. We had used pipes with thicker wall thickness on the bottom of the pipe and in the bends, but these only helped prolong the inevitable. I then spent time reconstructing the interior of the pipe to agitate the sand settling on the bottom, due to gravity, which also restricted the medium flow by upwards of estimated 40%. The action also had beneficial effects in the reduction of internal wear and the bend/deviation 'Rock Boxes' became unnecessary which also reduced the power required to drive the pumps. I have not had to use my technology for a long time as I entered a different phase in my working life. Back in the days I talk about, we did not keep diaries or data, but worked on the end results of tried and proven to our satisfaction of less running costs. Should anyone be interested in this technology, I can reconstruct hand drawings to demonstrate what I did to save my finances. Leslie (Les) D. Dunn TECMATE Mine Services Pty Ltd. I have tried certain mechanical means and hydraulic means to reduce the wear at bend/deviations when we used steel pipe & plastic pipes to convey sand slurry during dredging operations. Initially, we used to turned the piping 90 degrees during the working life of the dredging operations to get even wear from the pipe internals and ‘Rock Boxes’ at the deviation points. We had used pipes with thicker wall thickness on the bottom of the pipe and in the bends, but these only helped prolong the inevitable. I then spent time reconstructing the interior of the pipe to agitate the sand settling on the bottom, due to gravity, which also restricted the medium flow by upwards of estimated 40%. The action also had beneficial effects in the reduction of internal wear and the bend/deviation ‘Rock Boxes’ became unnecessary which also reduced the power required to drive the pumps. I have not had to use my technology for a long time as I entered a different phase in my working life.

Back in the days I talk about, we did not keep diaries or data, but worked on the end results of tried and proven to our satisfaction of less running costs.

Should anyone be interested in this technology, I can reconstruct hand drawings to demonstrate what I did to save my finances.

Leslie (Les) D. Dunn
TECMATE Mine Services Pty Ltd.

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