Mathematical modelling of temperature and emissions in fluidised bed furnace
(2021) MVKM01 20211Department of Energy Sciences
- Abstract
- The circulating fluidised bed boiler (CFB) consists of developing the combustion of a mass of fuel, in this case biomass, within a bed of particles in suspension, which have been fluidised by an ascending air current. Combustion occurs in a controlled manner throughout the entire furnace at temperatures around 850 ºC, which is lower than in conventional boilers, reducing NOx emissions. However, NOx emissions regulations are becoming increasingly stringent.
In the times the world is in, the importance of having energy independence is being demonstrated. In addition, the development and continuous improvement of this type of energy production plants with zero CO2 production balance is very important to achieve the reduction of climate... (More) - The circulating fluidised bed boiler (CFB) consists of developing the combustion of a mass of fuel, in this case biomass, within a bed of particles in suspension, which have been fluidised by an ascending air current. Combustion occurs in a controlled manner throughout the entire furnace at temperatures around 850 ºC, which is lower than in conventional boilers, reducing NOx emissions. However, NOx emissions regulations are becoming increasingly stringent.
In the times the world is in, the importance of having energy independence is being demonstrated. In addition, the development and continuous improvement of this type of energy production plants with zero CO2 production balance is very important to achieve the reduction of climate change.
The aims of this master's thesis are to study the distribution of NOx in the CFB boiler, owned by the company Kraftringen located in the province of Skåne, based on the Computational Fluid Dynamics (CFD) modelling of the combustion process created by the department of Fluid Mechanics and to add a new model to study the reduction of NOx through the injection of ammonia following the Selective Non-Catalytic Reaction method.
To do this, firstly, a simple simulation is carried out using a 1 m3 cube as a volume in which the programming designed for the injection of ammonia is validated and it is demonstrated that the NOx reduction method is effective. Finally, it is introduced into the CFB boiler model and simulated thanks to the SNIC supercomputer. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9079279
- author
- Lorenzo Gutierrez, Ivan LU
- supervisor
-
- Xue-Song Bai LU
- organization
- course
- MVKM01 20211
- year
- 2021
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- CFB, fluidization, NOx, SNCR, ammonia.
- report number
- LUTMDN/TMHP-21/5481-SE
- ISSN
- 0282-1990
- language
- English
- id
- 9079279
- date added to LUP
- 2022-05-13 09:33:09
- date last changed
- 2022-05-13 09:33:09
@misc{9079279,
abstract = {{The circulating fluidised bed boiler (CFB) consists of developing the combustion of a mass of fuel, in this case biomass, within a bed of particles in suspension, which have been fluidised by an ascending air current. Combustion occurs in a controlled manner throughout the entire furnace at temperatures around 850 ºC, which is lower than in conventional boilers, reducing NOx emissions. However, NOx emissions regulations are becoming increasingly stringent.
In the times the world is in, the importance of having energy independence is being demonstrated. In addition, the development and continuous improvement of this type of energy production plants with zero CO2 production balance is very important to achieve the reduction of climate change.
The aims of this master's thesis are to study the distribution of NOx in the CFB boiler, owned by the company Kraftringen located in the province of Skåne, based on the Computational Fluid Dynamics (CFD) modelling of the combustion process created by the department of Fluid Mechanics and to add a new model to study the reduction of NOx through the injection of ammonia following the Selective Non-Catalytic Reaction method.
To do this, firstly, a simple simulation is carried out using a 1 m3 cube as a volume in which the programming designed for the injection of ammonia is validated and it is demonstrated that the NOx reduction method is effective. Finally, it is introduced into the CFB boiler model and simulated thanks to the SNIC supercomputer.}},
author = {{Lorenzo Gutierrez, Ivan}},
issn = {{0282-1990}},
language = {{eng}},
note = {{Student Paper}},
title = {{Mathematical modelling of temperature and emissions in fluidised bed furnace}},
year = {{2021}},
}