desl experience-msw wte conversion technologies
TRANSCRIPT
Presented at
‘Asia Energy Security Summit’
organised by IPPAI , India
Bangkok, March 01, 2013
Dr G C Datta Roy
CEO, Development Environergy Services Limited (DESL)
New Delhi
DESL Experience-MSW WTE Conversion Technologies
Presentation Outline
DESL in Waste-to-Energy
Critical technology issues
DESL experience
Key learning & conclusions
2
DESL & Alternate Energy
Enabled energy saving of approx
200 MW in commercial buildings,
industries and municipal facilities
Designed and Engineered
over 500 MW of biomass
based power plants and
cogeneration
Designed and engineered
22 MW solid waste to
energy plant
Due Diligence & Project
development for 250 MW
of hydropower
400,000 LPD solar water heating in industrial processes
Introducing DESL 3
3 million tons of GHG emissions off-set
DESL MSW WTE Project portfolio Projects Commissioned
•16 MW Incineration based, Continuous operation since Feb, 2012 -Delhi
Project under Commissioning
•10 MW pyrolysis/reformation based, currently one module operating-Pune
Project under installation
•12 MW RDF based-Delhi
Feasibility Study
•5 MW Biomethanation based-Jamshedpur
Key Technology Issues
MSW Charaterisation • Physical
• Thermal
• Chemical
Fuel preparation technologies
Conversion technologies • Biomethanation
• Combustion
• Gasification
5
Physical & Thermal Characteristics
6
0
10
20
30
40
50
60
70
80
90
100
0
500
1000
1500
2000
2500
3000
3500
4000
4500
GC
V (
kCal
/kg)
MSW Characterization
GCV on as Received Basis Volatile Matter (VM) Fixed Carbon (FC)
Total Moisture (TM) Ash Content (AC)
VM
, FC
, TM
& A
C (
%)
Extremely wide variation-reasons for failure of many WTE plants in India
Technology-MSW Quality Compliance
Technology Compatibility Restrictive/Harmful
Biomethanation Food wastes, green wastes, excrements, paper, higher CN ratio
Non-paper fibres, plastics, metals, glass, inerts
Pyrolysis, gasification All fibres, moisture<15%, consistency
Metals extremely harmful, inerts
RDF All fibres, low moistures Plastics particularly PVC, inerts
Incineration Flexible PVC, inerts
8
PVC, moisture & inerts are the common problems-need for preparatory technology; simple for incineration to highly
sophisticated for gasification
Preparatory Devices-Fundamentals
Size reduction
Screening
Density separation
Pre & post drying
Metal removal
Inert reduction
9 Cost ratio for different systems has been as high as 1:10
Receipt & handling
Trommel
Manual removal-recyclable
Removing metals Primary Shredder
Ballistic separator Secondary Shredder
Drying
03/04/2013 10
Hot Air Generator Dryer Finished RDF
Preparatory need different for different conversion technologies RDF, a commercial fuel for many applications (Boilers, Kilns, pellets)
Biomethanation
11
MSW Pre-processing (Separation of non-biodegradable)
Shredding & crushing
Add water
Slurry preparation Add water
Digester Dewatering
Compost
Gas
En gi
n e G
Heater
Lowest specific cost, garbage management practices, compost market, segregation, land requirement
ArrowBio Biomethanation Project-Tel Aviv
12
Processing capacity-70000 TPA (250 TPD) Electricity output-630 KW Electricity export-370 KW
Incineration
13
Storage, handling, homogenization & feeding crane High capacity grab bucket
Remote operation of grab crane Furnace monitoring for feed control
Minimum investment on fuel preparation, most flexible, proven technology, high cost of incinerator, higher chances of harmful pollution
14
New Technology-Gasification
Pyrolyser
Heater
Reformer
Combustor
Steam
Gas Clean
Up
GE G
MSW Pre-processing
1
4
3
2
6
5
10
8
7
9
11
12
13
14
15
16 Inert, Recyclable, Lichette
17 Char
Media
Hot gas
Syngas
MSW
RDF
WHR HAG
Technology Evaluation-Gasification
15
Overall cycle efficiency of upto 2 times of other technologies, 3 commercial plants (USA, Japan & India), high end technology
India Gasification Plant under Commissioning
16
Dryer
Dry RDF conveyor Fuel silo Gasifier Flare tower
Engine generator
MSW preparatory system
DESL Learning & Conclusions
Parameters RDF Biomethanation
Incineration
Gasification
Remarks
Output-KW/100 TPD*
1100 175 1300 1600 Internal consumption high in RDF CV of plastics not counted
Technology status
Matured as fuel
Matured Matured Developing
BM technology yet to find success in India-garbage quality
Land need Medium High Low Low Need for land for fuel preparatory low in incineration Low for power block in gasification
Investment cost
High Lowest Medium High Even at higher level, cost in India is less than half/one third global benchmark
Environmental concerns
Medium Medium High Low High risk perception for incineration technology
18
*Garbage GCV of 1500 kCal/Kg
DESL believes that all the technologies would have their applications depending upon garbage quantity & quality, land
availability & societal willingness to pay for the services
19
Thank You
G C Datta Roy
Chief Executive Officer Development Environergy Services Limited (Formerly Dalkia Energy Services Ltd) # 819, 8th Floor, Antriksh Bhawan 22, Kasturba Gandhi Marg, New Delhi - 110001
Tel-+91 11 4079 1107 Fax-+91 11 4079 1101
Mob-+91 95829 40363 [email protected]
www.deslenergy.com