cold milk skimming - wordpress.com · cold milk skimming » for the production of raw milk ......
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» For the production of raw milk cheeses no pasteurization is per-formed, so cold milk skimming is necessary to standardize the fat content.
» For the production of high quality products – i.e. low heat milk powder - cold milk skimming is applied to avoid double heat-ing.
» A significant energy saving will be achieved if double heating is avoided.
» The main markets for cold milk skimming are Australia, New Zealand, Mexico and USA.
» Typically temperatures are bet-ween 4°C and 8°C, but in general terms anything below 20°C is regarded as cold milk separation.
In some cases milk is skimmed at low temperatures
Brochure
Video
cold mIlk skImmIng
Cream Pump
Rising Channel
Separating Disk
Disk Stack
Distributor Channel
Distributor
Ejection Port
Feed Bore in Spindle
Skim Pump
Bowl Top
Sediment Holding Space
Sliding Piston
Bowl Bottom
Hermetic Skimming Bowl
Bowl Flow AnimATion
Technology
» Milk viscosity higher at low temperatures, reduced separation velocity of fat globules
» Cream viscosity much higher at low temperatures, with risk of internal blockage of bowl
» Max. cream fat limited to 42%
» Cold milk skimming separators designed as hermetic machines, supply from below allows central cream discharge with big cross sections
» Cold milk skimming has higher demand of clarifying surface, equivalent machines handle smaller capacities than for hot milk skimming
» Skimming efficiency very dependent on temperature and capacity, with values of 0.08% to 0.4%
» Most milk fat fractions crystal-lized at low temperatures, fat globules much more fragile and sensitive to shearing stress
Cold milk skimming differs from hot milk separation
Technology
COMPARISON
Cold Milk SkimmingHot Milk Skimming
» feed from above
» discharge via double centripetal pump (static)
» hydrohermetic sealing
» feed from below
» discharge via double pumping wheel (rotating)
» mechanical seals
Key facTs
COMPARISON
MSE 500-01-777MSE 140-48-177
50.000 l/h _
45.000 l/h _
40.000 l/h _
35.000 l/h _
30.000 l/h _
25.000 l/h _
20.000 l/h _
15.000 l/h _
_ 10.000 l/h _
_ 5.000 l/h _
_ 0 l/h _
Capacity
maChine seleCtion
CapacityCold milk skimming 10,000 l/h
Process dataSolids space 5.0 lFeed pressure 6.0 barUseful discharge pressure skim milk 2.5 barUseful discharge pressure cream 0.5 bar
Energy requirementMotor rating 30 kWOil pump 0.14 kWOperating water 150 l/hCooling water 300 l/hControl air 0.02 Nm³/h
WeightsSeparator, complete 1,550 kgBowl 400 kg
Separator MSE 140-48-177Technical Data
FeaTUreS
SpeCiFiCaTiONS
MSE 140-48-177
DaTa SheeT
1 heavy phase discharge 2 Light phase discharge 3 Disk stack 4 Distributor 5 Sliding piston 6 Closing chamber 7 hollow spindle, drive 8 product feed 9 Solids holding space 10 Solids ejection port 11 Separating disk
Operating principles and constructional features
DiMeNSiONS
MSE 140-48-177
DaTa SheeT
1 heavy phase discharge 2 Light phase discharge 3 Disk stack 4 Distributor 5 Sliding piston 6 Closing chamber 7 hollow spindle, drive 8 product feed 9 Solids holding space 10 Solids ejection port 11 Separating disk
Operating principles and constructional features
DiMeNSiONS
A 1,700 mm B 850 mm C 1,455 mm D 2,600 mm
DiMeNSiONaL DraWiNg
MSE 140-48-177
MSE 500-48Throughput vs. temperature at 40% cream concentration
1.5 mm Disc Spacers
0.85 mm Disc Spacers
0.6 mm Disc Spacers
20,00013,500
0.20
0.16
0.12
0.08
0.04
0.0025,000 30,000 35,000
20,000
0.10
0.08
0.06
0.04
0.02
0.0025,000 30,000 35,000 40,000
20,000
1.5
1.2
0.9
0.6
0.3
0.025,000 30,000 35,000 40,000 45,000 50,000
4.5 ºC10.0 ºC15.0 ºC20.0 ºC
4.2 ºC7.0 ºC
15.0 ºC
10 ºC15 ºC52 ºC
EfficiEncy
GEA Mechanical Equipment / GEA Westfalia Separator
Separators from GEA Westfalia Separator for the Dairy Industry
Liquids to Value
Brochure