OPERATION & MAINTENANCE MANUAL
CompactFreezer
26
15.
Check the temperature and condition of the food coming out of the freezer. Make one or more
of the following adjustments if required:
a.
belt speed and/or belt loading
b.
production rate
c.
set point temperature
7.3.
PRODUCTION INTERRUPTIONS
Shutdown of the freezer for relatively short production interruptions such as breaks, lunch period or
production breakdown, a procedure that fits the processing line operation method should be established
and adhered to.
A.
If the production crew at the discharge end of the freezer remains to run out and pack
off the product, the temporary shutdowns would be to turn off the instrument power
when the freezer is emptied of product. Let the conveyor belt and fans run for production
interruptions of 30 minutes or less.
B.
If, for some reason, the packing crew at the discharge end of the freezer leave the line
at the same time as the crew at the infeed end of the freezer; it would usually mean
that there will be product running through the freezer on the conveyor. In this case, the
temporary shutdown would be to turn off instrument power, the fans, and the conveyor.
C.
Three or four minutes before restarting production, start the fan motors and conveyors,
checking to make sure everything is working, then push the instrument power to cool
the freezer to desired temperature. The product left is in the freezer over the shut
down may be over‐frozen by being left in the cold
atmosphere.
7.4.
VAPOR EXHAUST COLLECTION AND DISCHARGE
There is a vapor collection trough at each end of the freezer. The vapor exhaust blowers suck the vapors
to the outside of the building.
Blast Gate Damper
–
A blast gate damper installed in the ductwork near the duct connection to the
freezer controls the suction draw from the exhaust blower. For best efficiency, this should be to the
point where the vapor flow almost spills over into the room. Adjustments should be made throughout
the day.
7.5.
PRODUCT TEMPERATURE EQUILIBRATION
Equilibration is the process of equalizing the temperature of the center and outside of the product. This
occurs with time; the amount of time depending on the thickness of the product.
When a product is frozen in a cryogenic freezer, a frozen crust will quickly form on the outside surface,
Содержание COMPACT FREEZE TUNNEL
Страница 44: ...OPERATION MAINTENANCE MANUAL CompactFreezer 42 12 Appendices Appendix A Liquid Nitrogen MSDS...
Страница 45: ...OPERATION MAINTENANCE MANUAL CompactFreezer 43 Appendix B Reference Drawings...
Страница 46: ...OPERATION MAINTENANCE MANUAL CompactFreezer 44 Appendix C Component Manuals...
