Peter_1
02-06-2013, 07:01 PM
Setup freezer application: Bitzer OSNA7471 + SSNA7471 on a main suction collector.
Collector connected to the gas side of a LP receiver .
A Bitzer primary OA-type oil separator feeding direct the screws with recovered oil.
After the primary oil separator, 2 parallel connected secundary Bitzer OAS-oil separators with inbuild filters feeding the oil to the suction header, controlled by one common PLC controlled SV.
Air cooled Helpman oilcooler (large distance) with a 3-way after the cooler valve to mix hot with cooled oil to deliver oil at right temperature.
Gunter air cooled condensor. Flash gas separator after condensor.
Under the LP separatorn the 'belly' where the 2 pumps under the LP separator are connected, feeding 3 plate spiral freezers.
Flash gas separator after the condensor feeding direct an ice cream generator machine (no LP pumps) Have to go on site to verify how they accomplish low pressure regulating control in this machine.
No provisions for oil separation after the belly of the LP separator.
Oil separators are loosing their oil within some weeks and oil must then be drained after a night standstill out of the belly of the LP receiver.
In how far can you rely on the primary and the secundary oil separators to be sure they will remove the oil for let's say 99%?
Any ideas what to search for?
Collector connected to the gas side of a LP receiver .
A Bitzer primary OA-type oil separator feeding direct the screws with recovered oil.
After the primary oil separator, 2 parallel connected secundary Bitzer OAS-oil separators with inbuild filters feeding the oil to the suction header, controlled by one common PLC controlled SV.
Air cooled Helpman oilcooler (large distance) with a 3-way after the cooler valve to mix hot with cooled oil to deliver oil at right temperature.
Gunter air cooled condensor. Flash gas separator after condensor.
Under the LP separatorn the 'belly' where the 2 pumps under the LP separator are connected, feeding 3 plate spiral freezers.
Flash gas separator after the condensor feeding direct an ice cream generator machine (no LP pumps) Have to go on site to verify how they accomplish low pressure regulating control in this machine.
No provisions for oil separation after the belly of the LP separator.
Oil separators are loosing their oil within some weeks and oil must then be drained after a night standstill out of the belly of the LP receiver.
In how far can you rely on the primary and the secundary oil separators to be sure they will remove the oil for let's say 99%?
Any ideas what to search for?