2 replies to this topic

[sameercnn]

Dear Sir,

 

In one of H- AES type heat exchanger (R-Class), very loud noise is coming since from the commissioning (almost two years now). Currently flow rate through the compressor is 14 TPH which is lower than design value 22.3 TPH.

 

Shell side:

 

Fluid: Stripper off gas

Design press: 11.5 barg

operating press: 8.2 barg

Design Temp : 215 deg C

Oper Temp: 86.3/43 deg C

 

 

Tube Side:

 

Fluid : Cooling Water

Design Press: 10/ FV barg

Oper Press : 5.5 barg

Design Temp: 90/90 deg C

Oper Temp : 38/ 53 deg c

 

Please advise, how to control the noise or what modification is required. however we tried to reduce the flow rate, noise is reduced very little but noise level is more than 85 db. I appreciate your advise on this.

 

Thank you,

 

Regards,

Sameer

 

[PingPong]

Why have you waited two years without action? When you say commissioning, do you mean the initial start-up after the plant was newly built? Or after a maintenance shutdown? If the problem existing from day one you should have contacted the contractor that built the unit about this problem long time ago.

 

It is already difficult enough to do troubleshooting while standing in the plant, but with no relevant information at hand it is obviously impossible.

 

As a minimum one would need:

exchanger datasheet and drawing,

compressor datasheet and curves,

datasheets of stripper and its overhead equipment,

PFD and P&ID of exchanger and systems upstream and downstream,

design material balance around stripper, compressor and exchanger.

 

Without detailed info it is just guesswork. At this moment it is not even clear to the rest of the world whether the compressor is upstream or downstream the exchanger, or what type of compressor it is (centrifugal, reciprocating, ....)..

 

The kind of noise is also unknown to the rest of the world.

Is it maybe metallic like there is a loose baffle rattling inside the exchanger?

Is it maybe a caused by a tool left in the exchanger after maintenance?

Is it maybe tube vibration?

Is it maybe liquid entrained from the stripper?

Is the connecting piping vibrating?

is it maybe.............. , well, your guess is as good as mine.

 

In any case you run the risk of a future tube burst due to prolonged damage of tubes.

Edited by PingPong, 15 February 2017 - 04:29 AM.

[sameercnn]

Thank you sir.