VGB規格 Modelling primary NOx and primary N2O of Pulverised, Fuel Combustion and Circulating Fluidised Bed Combustion

VGB規格 Modelling primary NOx and primary N2O of Pulverised, Fuel Combustion and Circulating Fluidised Bed Combustion

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VGB規格 Modelling primary NOx and primary N2O of Pulverised, Fuel Combustion and Circulating Fluidised Bed Combustion

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Modelling primary NOx and primary N2O of Pulverised, Fuel Combustion and
Circulating Fluidised Bed Combustion
VGB規格 粉砕、燃料燃焼および循環流動層燃焼の一次NOxおよび一次N2Oのモデリング
発行元 VGB Verlag
発行年/月 2018年9月
装丁 ペーパー
ページ数 88 ページ
ISBN 978-3-96284-082-2
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Description

With more stringent emission limits with time, including NOx and N2O, and due to the high costs of secondary measures for NOx emissions reduction, knowledge of primary NOx and primary N2O is very important. With this knowledge, primary NOx and primary N2O can be reduced at low costs and in this way costs for secondary measures are much reduced as well. By applying the knowledge presented, the project costs of a CFBC plant can be lower than those of a PFC plant.

Knowledge regarding primary NOx and primary N2O, and their models, is useful for operators of PFC and CFBC regarding the influence of (the change of):

- Fuel, with PFC and CFBC
- Lambda, with PFC and CFBC
- Temperature, with CFBC
- Addition of limestone to the bed, with CFBC.

Knowledge regarding primary NOx and primary N2O, and their models, is useful for suppliers of boilers, burners, etcetera, regarding the influence of (the change of):

- Design, with PFC and CFBC
- Fuels and fuel flexibility, with PFC and CFBC
- Conversion of the boiler for other fuels, with PFC and CFBC
- Developing assisting systems / software, with PFC and CFBC
- Temperature, with CFBC
- Addition of limestone to the bed, with CFBC.

With this thesis, the mathematical models of primary NOx of CFBC, primary NOx of PFC and primary N2O of CFBC were improved. The models are based on chemical aspects, such as thermodynamics, kinetics and reaction mechanisms.

A model regarding PFC was made. This model is based on: the furnace, the specific N-content of the fuel, the fuel ratio FR and the air-to-fuel ratio Lambda. The models regarding CFBC are based on: the furnace, the specific N-content of the fuel, the fuel ratio FR, the combustion temperature and the air-to-fuel ratio Lambda.