the use of waste heat for drying digestate on...
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![Page 1: The use of waste heat for drying digestate on biogasplantssgc-konf.camero.se/ckfinder/userfiles/files/Dorset.pdf · The use of waste heat for drying digestate on biogasplants. Dorset](https://reader031.vdocuments.mx/reader031/viewer/2022022004/5aaaeee27f8b9a6c188ede69/html5/thumbnails/1.jpg)
The use of waste heat for dryingdigestate on biogasplants
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Dorset Group bv
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Dorset Group bv
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Dorset Green Machines bv
Use of waste heat for drying biomass
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Drying system on biogasplant
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Thermal energy from cooling water
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▶ Cooling water + exhaustgas cooling
Drying capacity
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▶ Cooling water + exhaustgas cooling
▶ Mixing with exhaust gas
Drying capacity
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▶ Cooling water + exhaustgas cooling
▶ Mixing with exhaust gas
▶ Waterevaporation : 0,6 -1,1 kg/ KWh
Drying capacity
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▶ Cooling water + exhaustgas cooling
▶ Mixing with exhaust gas
▶ Waterevaporation : 0,6 -1,1 kg/ KWh
▶ 500 Kwh electric = 3.600.000 KWh th/ y
Drying capacity
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Cascata fluidconcentrator
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Cascata fluidconcentrator
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Cascata fluidconcentrator
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▶ From liquid to solids
RM dryer with backmixing
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▶ From liquid to solids
▶ From 1.000 kg 8 % dm to 94 kg 85 % dm
RM dryer with backmixing
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▶ From liquid to solids
▶ From 1.000 kg 8 % dm to 94 kg 85 % dm
▶ All waste heat is used for drying
RM dryer with backmixing
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▶ From liquid to solids
▶ From 1.000 kg 8 % dm to 94 kg 85 % dm
▶ All waste heat is used for drying
▶ High NPK content
▶ Structure for organic fertiliser
RM dryer with backmixing
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RM dryer for cap. 90 ton per day
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RM dryer Endproduct
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▶ ex 1 2 3 4
▶ dm 88,5 82,8 92 92
▶ N g/kg 22,1 24,1 34,9 33
▶ P 30,7 21,5 31,3 57
▶ K 49,5 55,2 76,8 44,9
▶ As 20-35 %
▶ Calorific Value 14,4 MJ/ kg
RM dryer with backmixing
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Organic fertiliser
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Drying of solids after separation
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airflow
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productflow
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MB dryer with screwpress
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MB dryer with decanter
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▶ Very light 100-130 kg/m3
Product after drying
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▶ Very light 100-130 kg/m3
▶ Low on NPK
▶ With Decanter high on P
Product after drying
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▶ Very light 100-130 kg/m3
▶ Low on NPK
▶ With Decanter high on P
▶ For bedding or green energy
Product after drying
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▶ Very light 100-130 kg/m3
▶ Low on NPK
▶ With Decanter high on P
▶ For bedding or green energy
▶ pelletising or briquets necessary
Product after drying
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▶ ex 1s 2s 3d 4d
▶ dm 90,2 94,6 86,5 91,5
▶ N g/kg 12,6 18,4 15 19,7
▶ P 18,7 16,9 49,2 45,4
▶ K 14,6 24.3 23 26,1
▶ As 10- 25 %
▶ Calorific Value 15 MJ/ kg
MB drying after separation
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Drying of solids and pelletising
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▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
N-balance
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▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
▶ Aircleaning 90 % recovery of N
▶ ASL
N-balance
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▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
▶ Aircleaning 90 % recovery of N
▶ ASL
▶ 1.000 kg, 32,7 % dm with 9,45 kg N
N-balance
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▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
▶ Aircleaning 90 % recovery of N
▶ ASL
▶ 1.000 kg, 32,7 % dm with 9,45 kg N
▶ 378 kg dry with 15 kg N per ton
N-balance
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▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
▶ Aircleaning 90 % recovery of N
▶ ASL
▶ 1.000 kg, 32,7 % dm with 9,45 kg N
▶ 378 kg dry with 15 kg N per ton
▶ 10 kg of sulphuracid
▶ 68 liter of ASL
N-balance
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LGL Stripper
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Torrefication
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MEE Germany : Pyrolysis
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Digestate into biochar
Dried digestate50% Oil and Gas
50
%b
ioch
ar
Energy(Electricity/Heat)
Organic FertilizerEnergy
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Thank you for your attention