Harry Potterish wrote on Nov 27
th, 2012 at 7:19pm:
Hello Everyone,
One of the most common heat exchanger designs is called the shell and tube heat exchanger. The tubes in a shell and tube heat exchanger consist of small metal tubes between 1/2 and 1 inch in diameter. The shell side of these exchangers frequently has steam or other heating medium to transfer heat from the shell side fluid to the tube side fluid. Often, the tubes become plugged or fouled and should be cleaned out. One method is to boil the inside of the tubes with water or another cleaning solution.
Thanks a lot!
Harry Potterish
merusonline.com
And don’t forget to set up your h-ex so it is counter/contra flow Harry.
Also be careful not to over heat CIP (clean in place) chemicals as some are chlorine based (sodium hypochlorite) that will flash off over 60’C.
And I’m not sure how you boil the tubes? Perhaps hot water will suffice?
My recommendation would be…
1. Rinse – hot water 80’C + (this will kill most microbes as well)
2. CIP – circulate cleaning chemical for 15-20 minutes
3. Rinse
4. Acid rinse – to neutralise any alkaline chemicals – Sodium Hydroxides etc (GMP = take a pH test to ensure pH below 7)
5. Rinse – The final rinse may consist of a 2% acetic acid/hydrogen peroxide based sanitiser.
NB – Heat exchangers (shell/tube or tube/tube) also perform cooling functions (i.e. pasteurisers). Also tubes called “regeneration tubes” often have the flow of the heated product flow against the incoming product to be heated, this uses the energy already in the product without having to add more.
Plate h-ex are also common.
Let me know if you want any more training.
Your comments are lacking in specific information.
You idiot.
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Boil Heat Exchanger Tubes (Read 1263 times)
