Study on Powder Coke Combustion and Pollution Emission Characteristics of Fluidized Bed Boilers

The fluidized reactor is widely used in a number of chemical processes due to its high gas-particle contacting efficiency and excellent performance on solid mixing. An improved numerical framework based on the multiphase particle-in-cell (MP-PIC) method has been developed to simulate the processes o...

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Bibliographic Details
Published in:Energies (Basel) 2019-04, Vol.12 (8), p.1424
Main Authors: Chen, Yang, Wu, Haochuang, Deng, Kangjie, He, Hangxing, Sun, Li
Format: Article
Language:English
Subjects:
Accuracy
Air pollution
Air temperature
Biomass
Boilers
Carbon
Carbon sequestration
Chemical reactions
Coal gasification
Combustion
Combustion temperature
Computer applications
Computer simulation
Cost control
Decomposition
Drag
Emission analysis
emission characteristics
Energy conservation
Equations of motion
Experiments
Flue gas
fluidized bed
Fluidized bed combustion
Fluidized bed reactors
Fluidized beds
Fuel combustion
Gases
Industrial plant emissions
Laboratories
MP-PIC method
Nuclear power plants
Numerical analysis
Particle size
Pollutants
powder coke
Power plants
Pulverized coal
Residential energy
Simulation
Solid phases
Sulfates
Sulfur
Sulfur dioxide
Theory
Thermal power
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Summary:The fluidized reactor is widely used in a number of chemical processes due to its high gas-particle contacting efficiency and excellent performance on solid mixing. An improved numerical framework based on the multiphase particle-in-cell (MP-PIC) method has been developed to simulate the processes of gas–solid flow and chemical reactions in a fluidized bed. Experiments have been carried out with a 3-MW circulating fluidized bed with a height of 24.5 m and a cross section of 1 m2. In order to obtain the relationship between pollutant discharge and operating conditions and to better guide the operation of the power plant, a series of tests and simulations were carried out. The distributions of temperature and gas concentration along the furnace from simulations achieved good accuracy compared with experimental data, indicating that this numerical framework is suitable for solving complex gas–solid flow and reactions in fluidized bed reactors. Through a series of experiments, the factors affecting the concentration of NOx and SOx emissions during the steady-state combustion of the normal temperature of powder coke were obtained, which provided some future guidance for the operation of a power plant burning the same kind of fuel.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12081424