Milling-drying-pelleting [Lecture seule]

Milling-drying-pelleting [Lecture seule]
MILLING / DRYING / PELLETING
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MAGUIN PROMILL
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MAGUIN PROMILL
From design to after-sales
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MAGUIN PROMILL
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MAGUIN PROMILL
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MAGUIN PROMILL
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MAGUIN PROMILL
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MAGUIN RECENT DRYER PROJECTS
Dryer
Type
Pelleting
Drying
Capacity
T H2O/h
Country
Commission
ing
year
Fuel
Wood
3-pass drum
X
(10 presses)
26
Estonia
2014
Wood
Beet pulp
3-pass drum
X
(8 presses)
26
Russia
2013
Natural gas
Beet pulp
3-pass drum
X
(3 preses)
36
Egypt
2013
Dual oil/gas
Beet pulp
3-pass drum
X
(2 presses)
28
Ukraine
2013
Coal
Beet pulp
3-pass drum
26
Russia
2013
Natural gas
Beet pulp
3-pass drum
X
(2 presses)
26
Russia
2012
Natural gas
Beet pulp
3-pass drum
X
(2 presses)
26
Russia
2012
Natural gas
Beet pulp
3-pass drum
X
(3 presses)
55
Egypt
2012
Natural gas +
boiler flue gas
Beet pulp
3-pass drum
X
(4 presses)
72
Egypt
2011
Mix : fuel-oil/
natural gas
Beet pulp
3-pass drum
X
(4 presses)
65
Egypt
2010
Fuel oil
natural gas
Beet pulp
Alfalfa
Belt
X
10
21)
France
2009
None
DDGS
(cereals)
Turbo
3-pass drum
X
(3 presses)
32
France
2008
Natural gas
biogas, fusel oil
DDGS
(cereals)
Turbo
3-pass drum
X
(3 presses)
2 x 27
= 54
France
2007
Natural gas
Beet pulp
Alfalfa
Wood
(existing
3-pass drum)
X
(5 presses)
25
France
2007
Conversion
to biomass
Inlet
Product
(
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PULP DRYING TECHNOLOGIES
Belt drier
Direct fired
« turbo »
Hot stream in contact
with pulp
air
Combustion flue gas
Superheated
steam
remarks
Possibly wet air
recycling
+wet flue gas
recycling
With some air
Inlet T (°C)
70-110
650-900
400-450
Pressure inside dryer
atmospheric
atmospheric
atmospheric
Indirect heat
exchanger : hot stream
Hot waters; steam…
Hot waters
(combustion air
heating)
Combustion
flue gas
Fuel consumption type
(no)
Fossil; others
Flexible
800
800
20
50
Fuel consumption
kWh/t H2O
Power consumption
kWh/ t H2O
40
Heat recovery by
coupling kWh/ t/H2O
Product temperature
500
<100
<100
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COMBUSTION
Natural gas burner
Natural gas combustion furnace
Semi wet biomass screw furnace
Wet biomass screw furnace
Coal furnace
Heavy-oil furnace
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COMBINED 3-PASS & BELT- DRYERS
Bazancourt scheme:
former 2 coal fired 3-pass drum dryers
(wet bulb T°75°C),
70 t H2O / h
+ condenser
+ belt dryer
30D20
000
air
preheating
90% DM
D20 + D30: 70 t/h H2O
Fossil fuel 610 kWh/t H2O
wet pulp
30D30
000
air
preheating
90% DM
75°C
(wet bulb)
air
5 000 m²
condenser
10°C
120 000 m²
73°C
water loop
3
dust < 50 mg/Nm
70°C
°c dryer
3-stage 67
belt
600 m²
BT actuel 2x12 travées 460m ²
D20/D30
Evaporation 22 T/h
90% DM
3
21/70 = + 30% capacity
dust < 25 mg/Nm
21 t/h H2O
36°C
condensates
40 m3/h
62°C
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BELT DRYER: OTHER COUPLINGS
Coupling with beet plant:
Hot condensates:
Temperature up to 90°C
Availability: 290 t/h / 10 000 t/d beet
Hot-condenser bottom waters:
Temperature 50°C
Availability: 350 t/h / 10 000 t/d beet
Steam (2nd effect, 3rd effect…)
Flue gas (boiler, …)
…
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CONDENSER AFTER TWIN 3-PASS DRYERS
Bazancourt
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BELT DRYER
air
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« TURBO » 3-PASS DRYER
DD
dryer
Heat
exchanger
Gas
combustor
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« TURBO » 3-PASS DRYER
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« TURBO » 3-PASS DRYER: ADVANTAGES
Indirect heating:
pulp quality
Fuel choice: flexibility (biogas, biomass…)
Energy recovery:
High condensation yield
At T > 97°C (H 2O/air >> 7 kg/kg)
Low Emissions:
Dust
V.O.C. (CO, CH4, …)
NOx
Odors
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Maguin Promill Rotary Dryer
Products
Beet Pulp
Woodchips
Bagasse
Renewable Fuel
Corn Germ
Corn Fibres
DDGS
Spent Grains
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Maguin Promill Rotary Dryer
Use of direct fired gas or oil as or biomass as
energy source – 100% convection drying
Preferred for drying of coarse products – very
broad application field
Utilisation of hot exhaust gases (e.g. turbine
or boiler exhaust gases) possible
Water evaporation up to 90 ton/h per dryer
depending on the application
Low energy usage
Exhaust gas recycle option for improved
energy efficiency, self inerting (improved
safety)
Integrated ‘First flash effect’
Integrated cooler and pelletizer with energy
recovery as an option
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Working principle
Maguin Promill Rotary Dryer
The product is transported into a hot air stream.
Drying is achieved while the product is carried with the air stream
until being separated.
Depending on type of dryer, it can be a single pass or triple pass
dryer.
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Thank you
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