Tetra Pak Hoyer Frigus 600, Руководство пользователя

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6-29
Tetra Pak
Hoyer
B
F60 03 F 04
Fig. 6.5
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6.5.1 CIP washing
CIP (Cleaning In Place) washing permits
cleaning of the internal parts of the machine
which come into contact with the product with
no need to dismantle the machine.
If you have no centralised washing system, you
will at least need a container and a pump, as
shown in the illustration:
1.
Prepare washing solution at the correct tem-
perature for the stage in the washing cycle
to be performed (refer to table of wash
stages and conditions) in an appropriate
recipient.
he correct speed of the flow for a good CIP
washing is about 1,5 m/s in the frigus exiting
pipe. This involves a capacity of 5000 l/h
for a 1 1/2" exiting pipe. In these conditions,
the pressure drop is about 2 bar. The CIP
washing pump must guarantee these flow
rate and pressure characteristics.
3. Connect the pump outlet to the mix inlet
hose (1) and the freezer outlet hose (2) to
the container.
4. Start the CIP wash cycle (see par. 5.2.4 ).
In this condition the pump by-pass valve
and the ice cream output valve are open at
all times to maximise flow of cleaning
solutions, while the dasher and pump work
intermittently. The dasher and pump work
for 5 seconds per minute throughout the
duration of the wash cycle, so that they can
be washed without causing excessive wear
or severe damage to mechanical parts due
to lack of lubrication.
5. Start up the wash tank pump. The wash
cycle will be carried out as follows:
a-
Prewash with warm water.
b-
Detergent wash. Use an alkaline detergent
which is non-caustic and does not form
foam (containing a mixture of alkaline,
sequestering, anti-corrosive and surfactant
agents) with a pH of approximately 11 at a
concentration of 1%. Use a concentration
of 1.2% to 1.6%, depending on how dirty
the machine is and how hard the water
supply is.
c- Rinse with cold water.
d-
Descaling wash. Use buffered phosphoric
acid in a concentration of 0.5% to 1%.
e- Rinse with cold water.
f-
Disinfectant wash. Use a moderately
alkaline active disinfectant in a
concentration of 1% to 1.2%.
g- Rinse with cold water.
6. At the end of the washing programme, stop
the tank pump and disconnect hoses for
connection with freezer. Wait until all water
has flowed out.
7. After the washing programme, fill the
machine with disinfectant solution.
Connect the freezer mix inlet (3) to a
container filled with disinfectant solution;
start up the freezer pump and wait until
solution flows out of the ice cream outlet
pipe (4), then stop the pump. Drain the
solution and rinse with clean water before
starting production again.
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