operating results of the bgl gasifier at schwarze pumpeoperating results of the bgl gasifier at...
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EN VIROTHERM Gm bHAn Allied Technologies Group company
Operating Results of the BGL Gasifier at Schwarze Pumpe
Dr. Hans-Joachim Sander SVZDr. Georg Daradimos EnvirothermHansjobst Hirschfelder Envirotherm
Gasification Technologies 2003
San Francisco, California
October 12-15, 2003
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The location of SVZ
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Plant overview
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Gasification
Building
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Merging of the BGL and the SVZ TechnologyScotland Schwarze Pumpe
BGL Development + Demonstration
BGL / SVZ Pre-feasibility + Conceptual phase
BGL Design +
Construction
syn- + fuel gasproduction from coal + biomass +
wastes for electric powergeneration +
methanol synthesis
TowngasProduction
From lignite
BGL Demonstration
THERMIESupportobtained
EU support
Support from
Saxony, FRG
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Simplified SVZ Plant ConfigurationSolid Wastes (300.000 tpy)
Liquid Wastes
Grate Gasifier (7)
Entrained-flow Gasification (2)
Partial CO-Shift
Conditioning
Gas Purification
Methanol Synthesis
Methanol Distillation
Gas TurbinePG 6551 B
HRSG
Steam Turbine
FGD
Preparation
Coal
~steam/oxygen
BGL Gasifier (1)
Sour Gas GypsumSteam
Purge Gas45 MWel
District Heat
30 MWel ~Methanol, Grade AA (120.000 tpy)
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The British Gas/Lurgi Gasifier “BGL”
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BGL Gasifier Dimensions
Overall Dimensions
inside diameter 12 ft
outside diameter 16 ft
height approx. 41 ft
scale up 2.5 (cross section)
170 ft
0 ft
60 ft
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Westfield BGL / SVZ BGL - Comparison
Westfield BGL SVZ BGL1975 – 1985 1985 – 1991 since 2000
(ESG)
Diameter 6 ft 8 ft 12 ft
Feedstock bituminous coal hard coal waste and coal
Bed Height 13 ft 20 ft 20 ft (operating at 10-14 ft)
Fuel feeding system coal lock coal lock additional fuel locks (2)
Coal distributor yes (cooled) yes (ccoled) no
Coal stirrer yes (cooled) yes (cooled) nothree arms 5 arms
Brick lining reactor vessel reactor vessel 100% reactor vessel(up to coal distributor) (50% of height)
Gas offtake temperature 1000 °F 750 °F 1000 °F (coal)1450 °F (waste)
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Feedstock
Waste / Coal Mixtures treated and gasified at SVZ
Typical Current
Range Operation
(% by weight)
RDF-Pellets 30 - 50 20 25 30
Agglomerated Plastic Waste 20 - 30 30 45 45
Compacted Shredder Light Fraction 8 - - -
Briquetted Industrial Sludge 5 - 10
Briquetted Sewage Sludge 5 - 15
Shredded Wood Waste 0 - 10 - - -
Hard Coal/Lignite 20 - 25 19/6 12.5/7.5 12.5/7.5
25 10 5
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RDF-pellets
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Agglomerated Plastic Waste
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Shredded Wood Waste
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Comparison between expected and achieved basis of design
0
20
40
60
80
100
120
140
Throughput Consumption Consumption Consumption Consumption
PercentagePercentage
(waste and coal) Oxygen
100% = basis of design
Steam Electricity Nat-Gas
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Slag Quality
Leaching properties as per highest German rating are met
DC11) DC21)
Loss of Ignition (%) < 1,3 ≤ 3 ≤ 5
TOC (mg/ltr) < 0,7 < 1 < 3
Extractible
Lipophil matters (mg/ltr) < 0,2 ≤ 0,4 ≤ 0,8
1) Disposal class acc. to German “TA-Siedlungsabfall” (DC1 is highest rating)
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Extended Test Runs at SVZ with Petcoke/Coal only
petcoke blackcoal
Crude gas mN3/hr 31,000 33,000
(limited by oxygen available)
Oxygen consumption mN3O2/mN
3 crude 0.2 0.2
Steam/Oxygen ratio kg/kg 0.7 0.7
Coal (ar) metric ton/hr 19.5 20.4
CO2 (%) 1.0 4.4 (3.0 – 6.9)
CO (%) 59 56 (52 – 60)
Raw gas outlet temp. (°C) 580 550
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Typical Gasifier Performance Based on 100% Coal Operation
Feed 81,000 lbs/hr (ar)
68,000 lbs/hr (daf)
Typical Coal Analysis (%)
C 83H 6O 6N 2S 3
C Fix 47Volatiles 36Moisture 6Ash 11
Typical Crude Gas Analysis (%)
CO2 4CO 56H2 28N2 3CH4 7Others 2
Typical Module Size 140 MWel
Crude Gas54 mil. scf/d
Slag 9,000 lbs/hr
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Concluding Remarks to BGL-Gasification
• low specific consumption of oxygen and steam
• high throughput / high efficiency
• co-gasification of coal and waste possible and demonstrated
• successfully demonstrated in the SVZ for the combination of power and methanol production
• proven reliability
• viable solution
• commercially available, for gasification of coal
Envirotherm offers this process for commercial application
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Thank you very much for your kind attention!
Questions ???