the use of waste heat for drying digestate on...
Post on 16-Mar-2018
218 Views
Preview:
TRANSCRIPT
The use of waste heat for dryingdigestate on biogasplants
Dorset Group bv
Dorset Group bv
Dorset Green Machines bv
Use of waste heat for drying biomass
Drying system on biogasplant
Thermal energy from cooling water
▶ Cooling water + exhaustgas cooling
Drying capacity
▶ Cooling water + exhaustgas cooling
▶ Mixing with exhaust gas
Drying capacity
▶ Cooling water + exhaustgas cooling
▶ Mixing with exhaust gas
▶ Waterevaporation : 0,6 -1,1 kg/ KWh
Drying capacity
▶ 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
Cascata fluidconcentrator
Cascata fluidconcentrator
Cascata fluidconcentrator
▶ From liquid to solids
RM dryer with backmixing
▶ From liquid to solids
▶ From 1.000 kg 8 % dm to 94 kg 85 % dm
RM dryer with backmixing
▶ 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
▶ 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
RM dryer for cap. 90 ton per day
RM dryer Endproduct
▶ 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
Organic fertiliser
Drying of solids after separation
airflow
productflow
MB dryer with screwpress
MB dryer with decanter
▶ Very light 100-130 kg/m3
Product after drying
▶ Very light 100-130 kg/m3
▶ Low on NPK
▶ With Decanter high on P
Product after drying
▶ Very light 100-130 kg/m3
▶ Low on NPK
▶ With Decanter high on P
▶ For bedding or green energy
Product after drying
▶ 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
▶ 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
Drying of solids and pelletising
▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
N-balance
▶ Organic N in dry product
▶ Ammonium- N 300 gr / ton
▶ Aircleaning 90 % recovery of N
▶ ASL
N-balance
▶ 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
▶ 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
▶ 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
LGL Stripper
Torrefication
MEE Germany : Pyrolysis
Digestate into biochar
Dried digestate50% Oil and Gas
50
%b
ioch
ar
Energy(Electricity/Heat)
Organic FertilizerEnergy
Thank you for your attention
top related