INSTALLATION, OPERATION and MAINTENANCE MANUAL | 59
12.5. Cleaning-In-Place
Cleaning in place (CIP) is accomplished by circulating a suitable cleaning solution
through the APV GPHE instead of opening it. CIP works best in the reverse direction of
normal flow. Good results are also possible with same direction flow and at higher velocities
than the product flow velocity.
The cleaning solution must be circulated at sufficient velocity to flush out the product. Higher
viscosity products generally require higher velocity flushing to correctly clean.
Great care must be taken to select correct cleaning solutions and cycles to avoid
damaging the plates and gaskets. Due to the large variety of cleaning needs, each user
is responsible for determining the best cleaning method for their situation. It is
recommended that a reputable supplier of cleaning materials be consulted for
assistance. The capacities and resistance to corrosion of plate heat exchangers depend
on the plate pack being kept clean.
Example of CIP-cleaning:
Drain product residues, cooling, and heating media.
Rinse with cold or lukewarm water.
Circulate warm cleaning fluid solution.
Rinse with warm water or warm water with softener added.
Rinse with cold or lukewarm water.
In simple cases cleaning can also be affected without circulation, but by pouring a
cleaning fluid solution into the system. After some time of standing, flush the solution with
clean water.
If the APV GPHE is to be out of operation for a long period of time, it is advisable to empty
it, separate the plates, and clean the equipment. After cleaning, lightly re-clamp the plate
pack and cover it to protect from dirt and UV light. Please refer to Section 10.0 on Storage.
Determination of correct CIP system
The APV GPHE must be opened for inspection at regular intervals. This is necessary
especially during the initial startup period, until experience has been gained on the
effectiveness of the cleaning regime. With these inspections, it will gradually be possible
to determine circulation times, temperatures, and chemical concentrations with great
certainty.
Insufficient cleaning is most often due to:
Insufficient circulation rate.
Insufficient cleaning time or temperature.
Insufficient concentration of the cleaning agent.
To Next Page
Loading...