Investigations of operation problems at a 200 MWe PF boiler
To minimize oxides of nitrogen (NOx) emission, maximize boiler combustion efficiency, achieve safe and reliable burner combustion, it is crucial to master global boiler and at-the-burner control of fuel and air flows. Non-uniform pulverized fuel (PF) and air flows to burners reduce flame stability a...
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Polish Academy of Sciences Committee of Chemical and Process Engineering
2015-09-01
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| Series: | Chemical and Process Engineering |
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| Online Access: | http://www.degruyter.com/view/j/cpe.2015.36.issue-3/cpe-2015-0021/cpe-2015-0021.xml?format=INT |
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| author | Peta Sandile Toit Chris du Naidoo Reshendren Schmitz Walter Jestin Louis |
| author_facet | Peta Sandile Toit Chris du Naidoo Reshendren Schmitz Walter Jestin Louis |
| author_sort | Peta Sandile |
| collection | DOAJ |
| description | To minimize oxides of nitrogen (NOx) emission, maximize boiler combustion efficiency, achieve safe and reliable burner combustion, it is crucial to master global boiler and at-the-burner control of fuel and air flows. Non-uniform pulverized fuel (PF) and air flows to burners reduce flame stability and pose risk to boiler safety by risk of reverse flue gas and fuel flow into burners. This paper presents integrated techniques implemented at pilot ESKOM power plants for the determination of global boiler air/flue gas distribution, wind-box air distribution and measures for making uniform the flow being delivered to burners within a wind-box system. This is achieved by Process Flow Modelling, at-the-burner static pressure measurements and CFD characterization. Global boiler mass and energy balances combined with validated site measurements are used in an integrated approach to calculate the total (stoichiometric + excess) air mass flow rate required to burn the coal quality being fired, determine the actual quantity of air that flows through the burners and the furnace ingress air. CFD analysis and use of at-the-burner static, total pressure and temperature measurements are utilized in a 2-pronged approach to determine root-causes for burner fires and to evaluate secondary air distribution between burners. |
| format | Article |
| id | doaj-art-e9c1e7188d6946eebc9b82de9e913dc1 |
| institution | OA Journals |
| issn | 2300-1925 |
| language | English |
| publishDate | 2015-09-01 |
| publisher | Polish Academy of Sciences Committee of Chemical and Process Engineering |
| record_format | Article |
| series | Chemical and Process Engineering |
| spelling | doaj-art-e9c1e7188d6946eebc9b82de9e913dc12025-08-20T02:21:54ZengPolish Academy of Sciences Committee of Chemical and Process EngineeringChemical and Process Engineering2300-19252015-09-0136330532010.1515/cpe-2015-0021cpe-2015-0021Investigations of operation problems at a 200 MWe PF boilerPeta Sandile0Toit Chris du1Naidoo Reshendren2Schmitz Walter3Jestin Louis4ESKOM SOC, Group Technology Engineering, Boiler Auxiliaries, 1 Simba Rd, Sunninghill, Johannesburg, South AfricaESKOM SOC, Generation Engineering, Camden Power Plant, Ermelo, South AfricaUniversity of Witwatersrand, School of Mechanical, Industrial and Aeronautical Engineering, Johannesburg, South AfricaUniversity of Witwatersrand, School of Mechanical, Industrial and Aeronautical Engineering, Johannesburg, South AfricaUniversity of Cape Town, Faculty of Engineering and the Built Environment, Cape Town, South AfricaTo minimize oxides of nitrogen (NOx) emission, maximize boiler combustion efficiency, achieve safe and reliable burner combustion, it is crucial to master global boiler and at-the-burner control of fuel and air flows. Non-uniform pulverized fuel (PF) and air flows to burners reduce flame stability and pose risk to boiler safety by risk of reverse flue gas and fuel flow into burners. This paper presents integrated techniques implemented at pilot ESKOM power plants for the determination of global boiler air/flue gas distribution, wind-box air distribution and measures for making uniform the flow being delivered to burners within a wind-box system. This is achieved by Process Flow Modelling, at-the-burner static pressure measurements and CFD characterization. Global boiler mass and energy balances combined with validated site measurements are used in an integrated approach to calculate the total (stoichiometric + excess) air mass flow rate required to burn the coal quality being fired, determine the actual quantity of air that flows through the burners and the furnace ingress air. CFD analysis and use of at-the-burner static, total pressure and temperature measurements are utilized in a 2-pronged approach to determine root-causes for burner fires and to evaluate secondary air distribution between burners.http://www.degruyter.com/view/j/cpe.2015.36.issue-3/cpe-2015-0021/cpe-2015-0021.xml?format=INTprocess flow modellingmass and energy balancefurnace CFD modellingPF swirl burner |
| spellingShingle | Peta Sandile Toit Chris du Naidoo Reshendren Schmitz Walter Jestin Louis Investigations of operation problems at a 200 MWe PF boiler Chemical and Process Engineering process flow modelling mass and energy balance furnace CFD modelling PF swirl burner |
| title | Investigations of operation problems at a 200 MWe PF boiler |
| title_full | Investigations of operation problems at a 200 MWe PF boiler |
| title_fullStr | Investigations of operation problems at a 200 MWe PF boiler |
| title_full_unstemmed | Investigations of operation problems at a 200 MWe PF boiler |
| title_short | Investigations of operation problems at a 200 MWe PF boiler |
| title_sort | investigations of operation problems at a 200 mwe pf boiler |
| topic | process flow modelling mass and energy balance furnace CFD modelling PF swirl burner |
| url | http://www.degruyter.com/view/j/cpe.2015.36.issue-3/cpe-2015-0021/cpe-2015-0021.xml?format=INT |
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