presentation dorset green machines (andré hermsen)
TRANSCRIPT
●
DORSET Biomass Drying Systems
André Hermsen
Private company, grounded in 1985Aalten, The Netherlands, 120 employeesAnnual turnover € 25 million
• Biological Air Washers for pig and poultry farming• Sorting systems for selecting pigs in large groups• Feeding systems
• Animal identification• Access control and time attendance systems• Industrial reading equipment• Customer specific electronics (e.g. Pig sorting system)
• Drying systems for liquids, slurries and solids
• Chemical air cleaning systems
• Biological air cleaning systems
Drying biomass
• Liquids, slurries and solids like:
- substrates from biogas plants- (poultry) manure- sewage sludge- wood chips, sawdust, leaves, bark- grass, luzerne- paper pulp- maize- etc.
Waste heat sources
• Returned cooling water from CHP’s and ORC’s (90⁰C)
• Hot water from exhaust gas coolers (90⁰C)
• (Industrial) steam or condense water (various temperatures)
• Heat from ventilation poultry houses (20⁰C)
Reasons to dry an organic product
• Adding valuetransformation into:
- organic fertilizer- bedding for cows
- fuel- preparation for storage
• Lower transport costs- reduced weight- reduced volume
Plate belt dryerPlate belt dryer
Turning point
Dry product collection
Product flow
Air flow
Dryer in container
22.000 t/a digestate (pig manure)20%dm → 90%dm2,8 MWthDorset dryers: 2x MBD18 HTTop loaders, silos, pelleting 2t/hChemical air cleaningBiological air cleaning
Air Cleaning
Chemical Air CleanerGoal: Removing Ammonia
Biological Air CleanerGoal: reducing Smell
Combination of both
DORSET chemical air cleaner
Emissions
Dust < 10 mg/m³
Ammonia < 10 mg/m³
Smell < 500 GE/m³ (250 ouE)
Biological air cleaner
2000 m³ air/h per m² filter surface
Example (field measurement):
after dryer: 3775 GE/m³after biowasher: 170 GE/m³(target smell value: ˂ 500 GE/m³)
1 GE = 0,5 OU
Drying poultry manure
Advantages:
• Lower transport cost (up to 65% less weight)
• Dry manure is valuable product (fertilizer and fuel)
• Reduction of dust emissions by 70%
• Less smell at barn (because of less dust and dry storage)
Poultry house ventilation air →
(free energy)
Pelleting plant
manure belts
poultry houses
dryer
dryerair duct
André HermsenTelephone: +31.543472103 Mobile: +31.615559328E-mail: [email protected]: www.dorset.nu
Fertilizer
layers broilers
N (Nitrogen) 4% 3%
P (Phosphorus) 3% 4%
K (Potassium) 2% 3%
Fuel 13 MJ / kg (12,300 BTU)
Dry poultry manure
Pelleting
Pelleting plant:
• Bunker
• Crusher
• Press
• Sanitation (70⁰C, 1 hr)
• Cooling
• Bagging
Capacities: 125 kg/h
400 kg/h
800 kg/h
2000 kg/h
Heat recovery
.
Wood chips, sawdust, grass, fluff
Separator
Dryer Dryer withback-mixing
85% dm
Digestate
85% dm
• Bedding material• Fuel• Fertiliser (pelleted)
• Fertiliser
Cascata(thickener)
• Storage volume reduction
2 - 5% dm 25% dm 8% dm
8 - 14% dm
Hot water 90⁰C
Back mixing
Example NPK-values
Separated Back-mixing
(screw press) (decanter)
N 18 15 26 (g/kg)
P 18 49 31 (g/kg)
K 20 23 60 (g/kg)
N - nitrogen: promotes growth of leaves and vegetationP - phosphorus: promotes root and shoot growthK - potassium: promotes flowering, fruiting and general hardiness
Example 500 kWth dryer
in: out:
8% ds 3.532 t/a 85%ds 332 t/a
25% ds 4.000 t/a 85% ds 1.176 t/a
Water: 400 t/a Ammonium Sulfate:453 t/a 292 t/a (4,24%)
Acid: 38 t/a 331 t/a (4,24%)43 t/a Water with dust:
146 t/a
165 t/a
Dryer
Air cleaner
DORSET Cascata (thickener) Product in: liquid 2 - 5%
Product out: liquid 8 - 14% (40% weight reduction)
Drying efficiency: 0,6 - 0,8 kg/kWth
Thank you for your attention !
Dorset Green Machines B.V.Weverij 26 7122 MS Aalten The Netherlands T: +31 (0) 543 472103 F: +31 (0) 543 475355 E: [email protected]