technical equipment for agricultural anaerobic digesters in europe
DESCRIPTION
Technical Equipment for agricultural anaerobic digesters in Europe. Camilo Andrés Wilches Tamayo Biogas weser ems GmbH & Co KG. Table of contents. Company´s Presentation Possible Biogas Power Plant configurations Renewable raw materials Biowaste Technical equipment Feeding system - PowerPoint PPT PresentationTRANSCRIPT
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Technical Equipment for Technical Equipment for agricultural anaerobic agricultural anaerobic
digesters in Europedigesters in Europe
Camilo Andrés Wilches TamayoBiogas weser ems GmbH & Co KG
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Technical Equipment for agricultural anaerobic digesters in Europe
Table of contents
•Company´s Presentation
•Possible Biogas Power Plant configurations•Renewable raw materials•Biowaste
•Technical equipment•Feeding system•Pumping system•Heating system•Agitators•Gas storage in the digester•Pasteurization
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Technical Equipment for agricultural anaerobic digesters in Europe
biogas weser ems GmbH & Co .KG is a company with over 10 years experience specializing in design, planning and construction of biogas power plants
• More than 150 installed biogas plants• Installed capacity >98 MWel • Energy parks 8,5MWel• International Projects
The company
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Technical Equipment for agricultural anaerobic digesters in Europe
Possible configurations of the biogas plant
Renewable raw materials.
• Majority of German plants (EEG 2004)
• Independence of the farmer
• Price 19 cent/kWh Germany 13.5 cent/kWh Spain 28 cent/kWh Italy
• Special Equipment• Solid feeder• Pumps • Agitators
Renewable raw materials. „NaWaRo“
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Technical Equipment for agricultural anaerobic digesters in Europe
Possible configurations of the biogas plant
Biowaste
• This region has an intensive food and livestock production
• Waste market
• Price 9 cent/kWh Germany 13.5 cent/kWh Spain 22 cent/kWh Italy
• Special Equipment• Pasteuritzation unit• 2 Pumps are required• Double walled digester with leakage detection
Biowaste
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Technical Equipment for agricultural anaerobic digesters in Europe
CHP
Biogas
Digester 1
Digestates Storage
Digester 2
Pumps
Feeding system
Biogas Biogas
Technical equipment
Heating system
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Technical Equipment for agricultural anaerobic digesters in Europe
Technical equipment
Feeding system
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Technical Equipment for agricultural anaerobic digesters in Europe
Depends of the substrate
• Dry matter < 12% pumped from tanks to the digesters
• Dry matter > 25% solid feeder and augers to the digestersConfigurations: Walking floor : corn, cereals
(size 20-120 m³)
Mixer feeder: straw(size 8 -80m3) manure + straw
paste materials (powder) liquid producing materials
Technical equipment Feeding system
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Technical Equipment for agricultural anaerobic digesters in Europe
Pumps
Feeding system
Technical equipment
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Technical Equipment for agricultural anaerobic digesters in Europe
In general a susbtrate is pumpable when: Dry matter <12 %, homogeneos, particle size < 12mm
Pumping system:Any possible substratemovement is allowed
Technical equipment Pumping system
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Technical Equipment for agricultural anaerobic digesters in Europe
Most of the pumps used are Positive Displacement PumpsPumps type:
• Rotary lobe pump: price high wear (more maintenance)+ size - easy maintenance suction capacity < 0,9 bar
• Progresive cavity pump:
less maintenance time demanding maintenance+ high pressure (25 bar) -
suction capacity < 0,9 bar
500 kW power plant 11 kW, 50 m3/h
Technical equipment Pumps
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Technical Equipment for agricultural anaerobic digesters in Europe
Long distance between substrate storage tank and pump station ?
• Centrifugal pump
directly in the tank
Normally used for manure DM= 8% 11 kW 90 m3/h.
Technical equipment Pumps
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Technical Equipment for agricultural anaerobic digesters in Europe
Questions?
(Break 5 min)
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Technical Equipment for agricultural anaerobic digesters in Europe
CHPPumps
Feeding system
Heating system
Technical equipment
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Technical Equipment for agricultural anaerobic digesters in Europe
Technical equipment Heating system
Heat requirements (625 kW biowaste):
Heat up substrate (8°C to 40°) = 38,64 kWth
Maintain temperature digesters = 170 kWth (outside temperature -12°C)
Pasteurizer 70°C 1 hour = 80 kWth
External user (green house, industry,,,)
Energy Flow gas motor 625 kWel
P th Exhaust gas
P th hot water
P th losses
P el
A
B
T= 40° T= 35°
B AIntercooler1st stage
Lube oil Engine Exhaust gas
Intercooler 2st stage
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Technical Equipment for agricultural anaerobic digesters in Europe
Technical equipment Heating system
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Technical Equipment for agricultural anaerobic digesters in Europe
CHP
Digester 1Digester 2
Pumps
Feeding system
Heating systemDigestates Storage
Technical equipment Agitators
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Technical Equipment for agricultural anaerobic digesters in Europe
Technical equipment Agitators
• Submersible Agitators: Used in all installations Possibility to change - height
- orientation 17kW -> agitate 1000 m3
10 min every hour
always during digester feeding
• Dry substrate Agitators Used for dry substrates straw, mais, cereals, offal flour
Low density of the substrates < 1 g / cm3
Destroy acumulations of solids.
15kW similar capacities
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Technical Equipment for agricultural anaerobic digesters in Europe
CHP
Biogas
Digester 1
Digestates Storage
Digester 2
Pumps
Feeding system
Biogas Biogas
Technical equipment Gas storage membrane
Heating system
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Technical Equipment for agricultural anaerobic digesters in Europe
Digester´s section
Technical equipment Gas storage membrane
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Technical Equipment for agricultural anaerobic digesters in Europe
CHP
Biogas
Digester 1
Digestates Storage
Digester 2
Pumps
Feeding system
Biogas Biogas
Technical equipment Pasteurization
Heating system
PasteurizationPasteurization
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Technical Equipment for agricultural anaerobic digesters in Europe
Technical equipment Pasteurization
Heat treatment (EU 1774)
•avoid risk of dispersal of patogens from any animal subproduct
•70°C, 1h
•Pumpable material
•Two pumps are required
• Tanks with heating and mixing system.
•When sizing consider heating time (4 h)
•Pasteurized material should not be put directly in to digester
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Technical Equipment for agricultural anaerobic digesters in Europe
Questions?
Camilo Wilches T.biogas-weser-ems GmbH &Co.KG