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7/29/2019 6 - MLee Managing WTE Cost Recovery
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Managing WTE Cost RecoveryTA 7294-PRCMunicipal Waste to Energy Project
Michael Lee
Waste to Energy Expert and Team Leader
August 18, 2013
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The Municipal Waste to Energy
Project
TA Scope of Work
- Operational performance of WTE plants- Environmental management and capacitydevelopment
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The Municipal Waste to Energy
Project
Work Program
- Kick-off meeting held in Hong Kong, June 22
- Submission of Inception Report, August 13
- Three Annual Workshops, 2010 and 2012-2013
- Interim Report submitted, 3rd quarter of 2013
- Final Report to be submitted, 1st quarter of 2015
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CEIL WTE Facilities
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CEIL WTE Facilities (Contd)
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CEIL WTE Facilities (Contd)
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CEIL WTE Facilities (Contd)
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Managing WTE Cost Recovery
Lower project risk on operatingagreement and performance guaranteeT&C
Cost effectiveness operating andmaintenance
Overall success on favorable pricing andgood revenue expectations
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Refuse Handling and Mixing
Removal of undesirable waste
Good refuse mixing and pit operation
Supplemental fuel and waste
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Furnace Combustion
Maximizing time, temperature andturbulence
Adequate Combustion air
Critical Temperature control
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Repairs and Replacement
Routine equipment maintenance
Major overhaul
Necessary repairs and replacementwork
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Overall WTE Performance
The performance of all CEIL WTE facilities in thepast few years has, for the most of the time, beenbetter than originally designed ; and
This is expected to continue as long as routineequipment maintenance and major overhaul,necessary repairs and replacement work been
keep-up continuously.
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O&M Benchmarking
Boiler and Turbine GenerationAvailability
Electricity Generation and Use
Lime and Carbon Use
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Boiler and Turbine Generator
The percentage of time that each combustion unitand the turbine- generator operated during theyear
Combustion unit and turbine-generator availabilityhave a direct effect on the amount of waste that afacility can process and the amount of electricity itcan generate
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Boiler and Turbine Generator
Average boiler and turbine-generator availability is93% and 95%, respectively, higher than 90.3% orcloser to 96.6%, of the average values of fifteenWTE s in the States
Boiler steam capacity utilization varies 88-106 % ,average of 95.6%, near the average 96% beencited in the States
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Boiler Availability
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Turbine-Generator Availability
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Boiler Steam Capacity Utilization
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Electricity Generation
Gross electricity, total amount of energyrecovered from the combustion process andconverted to electricity
In-plant electricity, the amount of energyused to operate the WTE
Net electricity, the amount of energyavailable for sale
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Electricity Generation
The average annual gross, 345-382 (ave.346) KWH/ton
Net electricity generation, 284-307 (ave. 285)
KWH/ton
In-plant electricity consumption, 55-75 (ave.
61) KWH/ton
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Electricity Generation and Use
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Lime and Carbon Use
Lime and activated carbon are used at WTEfacilities to control acid gases, andmercury/dioxins, respectively
Average lime use is 12.7 kg/ ton in 2012, 25%higher than 10.02 kg/ ton in 2011, with theadditions of scrubbers (higher than 9.66 kg/ ton,the average lime use been cited in the States)
Average activated carbon usage rate, is 0.36kg/ton of refuse
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Lime Feed Rates
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Carbon Feed Rates
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Environment & Community
Management
Air Emission & Noise Control
Leachate Treatment and reuse
Ash and resides management
Environmental monitoring
Community relation
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Air Emission & Noise Control
Noise level of cooling water circulation to be
monitored closely
Selective Non-Catalytic Reduction (SNCR )wasinstalled to reduce Nox
Dry lime neutralization system was introduced tofurther reduce HCl emission
Long term surrounding environment dioxin
monitoring is highly recommended
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Leachate Treatment and Reuse
Advance leachate treatment was ableto recycle treated leachate for in-plantuse
Methane-to-energy electricitygenerator system was adopted togenerate electricity
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Ash and Resides
Stringent site management on fly and bottomash on-site stabilization and storage issuggested
Fly ash is stabilized and disposal off in thedesignated landfill
Bottom ash is solidified and reused asconstruction material
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Financial Sustainability
The throughput and energy recovery is highlydependent on the refuse heating value, refusethroughput is inversely proportional to heatingvalue, but energy recovery is proportional to
refuse heating value
Net electricity generation, financial projectionsrely heavily on the expected net electricity
generation which establishes the expected energyrevenues
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Conclusion
Strong government policy & great supports
Diversify financing & government subsidies
Advance engineering & reliable equipment
Cost-effective operation & maintenance
Stringent environmental compliance
Good public relation and community supports
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Integrated Solid Waste Management
Workshop
Our sincere appreciation on Banks strongsupport and CEIL's arrangements and
courtesy been extended from CEILs ChinaOperations and the Project Companies
Thank you for this great opportunity to shareour TA experience on WTE cost recovery inthis ISWM Workshop
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