sita presentation
DESCRIPTION
NESHEP members visited SITA recycling plant in the Tees Valley. They were shown this presentation before taking a tour round the site.TRANSCRIPT
Energy from WasteTeesside
NESHEP
(North East Safety Health and Environmental Partnership) 08/08/2012Environmental Partnership)
7/08/2012
• Introduction
- Phil Stevens
- Plant Manager Sita Tees Valley
• Presentation
Agenda
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• Site tour
- Line 3
Content
• The aim of the presentation:
• To give an introduction to energy from waste
• Process
• Flue Gas Treatment
• Residues
• An overview of recent & new site development
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• An overview of recent & new site development
• About 30 minutes
• Please ask questions at anytime
The Process
What do we burn?
• Untreated Municipal Solid Waste - not a consistent fuel!
- Varies in form
• bagged or loose
• size fraction
- Moisture content
• time of season
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• time of season
• biodegradable waste up to 68%
- Incombustibles
• glass
• ferrous metals
• non-ferrous metals
- Varying Calorific Value
• 7.5 to 11.5 MJ / kg
-
EfW
• Thermal process – energy releasing
• Main energy conversion technologies
• Combustion
• Gasification
• Digestion
• Selection needs to be based on the optimum use of the fuel /
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• Selection needs to be based on the optimum use of the fuel / feedstock
• Direct combustion – most efficient method of energy conversion for waste handled on Teesside
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Direct Combustion
• 4 stage process
• Drying
• Vaporising
• Oxidising
• Burn out
• 4 hours
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• Major components
• Furnace with grate
• water tube boiler
• Steam turbine with generator
• Proven technology
• Reliable
Energy from Waste Plant
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EfW - Moving Grate
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MSW
250,000 Tonnes (1&2)
136,000 Tonnes (3)
Electricity
150,000 MWh (1&2)
76000 MWh (3)
F
U
E
LRESIDUES
E
N
E
R
G
Y
Energy Recovery
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APCR(4%)
Treatment
Ferrous Recovery
Non Ferrous Recovery
Aggregates
IBA(26%)
Water ~ re-use
Energy Recovery
10 MJ/ kg Waste Input100 %
Combustion and radiation losses, slag and flue gas losses
Boiler 42 bar / 400 Deg C -20.6%
Turbine Generator Condensation, generator - 52.3 %
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Turbine Generator Condensation, generator and radiation losses
- 52.3 %
Station Load Internal energy consumptionand transformer losses- 2.6%
Electricity Energy output approx. 0.58 MWh / t waste
24.5 %
=
Flue Gas Treatment
Waste Incineration Directive (WID)
Parameter Limit / Reference Period / Measure
Particulate matter 30 mg / m3 1/2 hour average Continuous
10 mg / m3 Daily average Continuous
Hydrogen chloride 60 mg / m3 1/2 hour average Continuous
10 mg / m3 Daily average Continuous
Carbon monoxide 100 mg / m3 1/2 hour average Continuous
50 mg / m3 Daily average Continuous
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Oxide nitrogen 400 mg / m3 1/2 hour average Continuous
200 mg / m3 Daily average Continuous
Sulphur dioxide 200 mg / m3 1/2 hour average Continuous
50 mg / m3 Daily average Continuous
TOC 20 mg / m3 1/2 hour average Continuous
10 mg / m3 Daily average Continuous
Heavy metals .5 mg / m3 1/2 hour period Quarterly
Dioxin / furans .1 ng / m3 6 hours Bi-annual
Abatement Process
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FGT Process
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Emission Performance
30
40
50
mg/Nm3
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HCl
SO20
10
20
WID
Teesside 3
mg/Nm3
Residue
• SITA UK / Ballast Phoenix
• Alternative to Raw Aggregate
- General Construction
- Road construction
• A process of grading & screening
Residue Recycling (IBA)
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Tees Valley Kirklees Isle of Man
Architecture
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• Just starting construction of Lines 4&5
• £150 million investment (approx)
• Design 256,000 tonnes waste
• Waste from Gateshead, Sunderland & South
STV Lines 4 & 5
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Tyneside
• HZI Technology – as for Line 3
• 3 Year build – April 2014
• 25 year contract
STV Lines 4 and 5
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Any Questions??
www.sita.co.uk
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