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Steam Condensate Line Hammering


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#1 pronab

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Posted 10 September 2018 - 02:11 PM

A Heat exchanger consists of jacketed pipe to increase dry gas for 5 Deg C by saturated Low Pressure Steam of 4.4 barg pressure. Shell side is using LP steam and temperature of Inlet & Outlet (design temperature) is 145/145 C, while pressure is 4.4 barg. Out let of shell side is a steam trap which discharge is joining the steam condensate header. The exchanger is a concurrent flow.

In practical scenario, outlet steam condensate temperature is too cooled (approximately 40 0 C) while 5 0 C temperature increase is maintained and inlet steam pressure is approximately 2 barg.  Due to too cooled steam condensate joins the other sources of steam condensate which are approximately 100 0 C, there is hammering in the steam condensate header line. One suggest to keep the exchanger outlet steam condensate line heat tracing to increase the steam condensate temperature to avoid hammering. Will it works? Is there any other solution to avoid hammering?

 

Thanks in advance.

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#2 Bobby Strain

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Posted 10 September 2018 - 06:31 PM

You can inject a bit of steam into the condensate downstream of the trap. Or add a spray nozzle to inject the condensate into the condensate header.

 

Bobby



#3 breizh

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Posted 11 September 2018 - 03:39 AM

Hi ,

Using a spray nozzle is a good option  !

 

https://www.tlv.com/...rt-piping.html#

 

 

 

Breizh


Edited by breizh, 11 September 2018 - 03:41 AM.


#4 pronab

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Posted 12 September 2018 - 07:27 AM

Can anyone tell why out let steam condensate temperature is too cold?

#5 demank

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Posted 13 September 2018 - 01:45 AM

Can anyone tell why out let steam condensate temperature is too cold?

 

You can re-calculate the Xchanger performace based on the actual data.

If Steam Flowrate is too low or Process Gas Flowrate is too high than its datasheet values, then it is normal, condensate temparature is around 40 C which have 10 degree celcius temperature approach with Process Gas Temperature outlet.



#6 breizh

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Posted 20 September 2018 - 04:32 AM

hi ,

In addition to my previous post..

hope this is helping you and others

Breizh

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