Pressurized fluidized-bed combustion part-load behavior. Volume I. Summary report
Description
Tests performed during 1980 to determine the part-load characteristics of a pressurized fluidized-bed combustor for a combined-cycle power plant and to examine its behavior during load changing are discussed. Part-load operation was achieved by varying the bed temperature by amounts between 200 to 300/sup 0/F and the bed depth from between 9 and 10 ft at rates varying between 0.2 ft/min and 0.5 ft/min. The performance at part-load steady-state conditions and during transient conditions is reported with information on combustion efficiency (99% at full-load with 9 ft bed depth and 1650/sup 0/F bed temperature; 95% with 4 ft depth and … continued below
Physical Description
Pages: 119
Creation Information
Roberts, A. G.; Pillai, K. K.; Raven, P. & Wood, P. September 1, 1981.
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National Coal Board, Leatherhead (UK). Coal Utilization Research Lab.
Place of Publication: United States
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Description
Tests performed during 1980 to determine the part-load characteristics of a pressurized fluidized-bed combustor for a combined-cycle power plant and to examine its behavior during load changing are discussed. Part-load operation was achieved by varying the bed temperature by amounts between 200 to 300/sup 0/F and the bed depth from between 9 and 10 ft at rates varying between 0.2 ft/min and 0.5 ft/min. The performance at part-load steady-state conditions and during transient conditions is reported with information on combustion efficiency (99% at full-load with 9 ft bed depth and 1650/sup 0/F bed temperature; 95% with 4 ft depth and 1390/sup 0/F); sulfur retention (95/sup 0/ at full load to 80% at low bed depth and low bed temperature); sulfur emissions (no definitive results); NO/sub x/ emissions (tendency for increase as bed temperature was reduced); alkali emissions (no bed temperature effect detected); and heat transfer. It was demonstrated that load can be altered in a rapid and controlled manner by changing combinations of bed depth temperature and pressure. The most important practical change was the reduction in O/sub 2/ concentration which occurred when the bed height was increased at a rapid rate. The extra energy required to reheat the incoming bed material resulted (in the most extreme case) in a temporary drop in excess air from 65% to 12%. In a full-scale plant the loss of heat from the stored bed material would be much lower and the excess air trough when increasing load would not be as pronounced. Nevertheless, it seems prudent to design full-scale plant for a full load excess air of not less than about 50% when using bed depth as a load control parameter.
Physical Description
Pages: 119
Notes
NTIS, PC A06/MF A01.
Subjects
Keywords
- Air Pollution Control
- Boilers
- Carbon Compounds
- Carbon Monoxide
- Carbon Oxides
- Carbonaceous Materials
- Chalcogenides
- Coal
- Combined-Cycle Power Plants
- Combustors
- Control
- Control Systems
- Data
- Design
- Energy Sources
- Energy Transfer
- Europe
- Exhaust Gases
- Experimental Data
- Fluidized Bed Boilers
- Fluidized-Bed Combustors
- Fluids
- Fossil Fuels
- Fuels
- Gas Turbines
- Gaseous Wastes
- Gases
- Heat Transfer
- Hot Gas Cleanup
- Information
- Machinery
- Materials
- Nitrogen Compounds
- Nitrogen Oxides
- Numerical Data
- Operation
- Oxides
- Oxygen Compounds
- Performance
- Pollution Control
- Power Plants
- Purification
- Steam Turbines
- Sulfur Compounds
- Sulfur Dioxide
- Sulfur Oxides
- Thermal Power Plants
- Turbines
- Turbomachinery
- United Kingdom
- Wastes
- Western Europe 200104* -- Fossil-Fueled Power Plants-- Components
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- Other: DE82011078
- Report No.: DOE/MC/14129-171
- Grant Number: AC21-80MC14129
- Digital Object Identifier: https://doi.org/10.2172/5563483
- Office of Scientific & Technical Information Report Number: 5563483
- Archival Resource Key: ark:/67531/metadc1088075
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- September 1, 1981
Added to The UNT Digital Library
- Feb. 10, 2018, 10:06 p.m.
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- April 16, 2018, 5:32 p.m.
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Roberts, A. G.; Pillai, K. K.; Raven, P. & Wood, P. Pressurized fluidized-bed combustion part-load behavior. Volume I. Summary report, report, September 1, 1981; United States. (https://digital.library.unt.edu/ark:/67531/metadc1088075/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.