impigement plate

[zb61y97JUNIOR]

hello,
I need help to design impingement plate for steam inlet nozzles ( 10"NPS , 6"NPS & 3"NPS). my impingement plates are inside of the nozzles. is there calculation to do for flow to avoid bottleneck problem.
My plates are different than that usually used for tubular heat exchangers. Thanks

 

[MJCronin]

Junior,

Impingement plates have been used in steam service S&T HXs for many decades. Pressure drop is very modest.

Most of the time, the steam is heating another fluid stream and the steam is therefore saturated. The motive pressure is the condensation of the steam.

Is your steam saturated ? Is this device a process steam heater ?

The TEMA standard contains rules about impingement plate need and design for S&T heat exchangers. Pressure drop, I believe, is also addressed.

Are you familiar with this standard ???

Can you explain "My plates are different than that usually used for tubular heat exchangers" ??????

Is this a repurposed heat exchanger that you are working on ?

MJCronin
Sr. Process Engineer

 

[zb61y97JUNIOR]

Yes , I am designing a shell for a plate&shell heat exchanger (heater).
I Know TEMA , and I saw calculation for shell entrance , but I did not use it.
My impingement plate is an insert that I have to attaché to steam nozzle entrance , ( one ring superposed and attached by gussets to a solid plate ( smaller).

Thank you.

 

[zb61y97JUNIOR]

is it correct if I use calculation per TEMA RCB-4.62 ( ro V^2 < 4000)/
Thanks

 

[EdStainless]

Be careful of your supports, I have seen steam cut off plate supports more than once over the years.

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P.E. Metallurgy, Plymouth Tube

 

[MJCronin]

More impingement plate design information here:

http://www.eng-tips.com/viewthread.cfm?qid=215099

http://dc.engconfintl.org/cgi/viewcontent.cgi?article=1053&context=heatexchanger2007

https://books.google.com/books?id=l...age&q=calculation "impingement plate"&f=false

MJCronin
Sr. Process Engineer

 

[zb61y97JUNIOR]

thank You