Selected applications of Fourier transform in the diagnostics of the pulverized coal combustion process

2018 ◽  
Author(s):  
Żaklin M. Grądz ◽  
Assel Mussabekova
Keyword(s):  
Fourier Transform ◽  
Coal Combustion ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion

Behavior of Pulverized Coal Combustion in Air and in O2/CO2 Condition

2012 ◽  
Vol 229-231 ◽  
pp. 2804-2808
Author(s):  
Cahyadi Adi Surjosatyo ◽  
Yulianto S. Nugroho
Keyword(s):  
Fourier Transform ◽  
Oxygen Concentration ◽  
Coal Combustion ◽  
Combustion Process ◽  
Fourier Transform Infrared ◽  
Volatile Matter ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion ◽  
Oxyfuel Combustion ◽  
Ftir Spectrometer

Oxyfuel combustion is one of promising clean coal technologies for capturing CO2. Different environment in oxyfuel combustion between air condition and O2/CO2 condition is required to be studied. Thermo-gravimetric analyzer (TGA) and Fourier-transform infrared (FTIR) spectrometer was used to study the behavior of pulverized coal in different O2/CO2 environments. The burning process of pulverized coal in O2/CO2 environment was relative similar until burning the volatile matter and then combustion was delayed in burning the char compared with that in O2/N2 environment at the same oxygen concentration. In case of the oxygen concentration increase, the burning rate of coal increases and burnout time is shortened. The species in flue gas including H2O, CO2, CO, CH4, SO2 and NO during burning test in TGA were determined and analyzed using the Fourier-transform infrared (FTIR) spectrometer. Compared with pulverized coal combustion in O2/N2 condition, much more CO is produced in O2/CO2 coal combustion process.

The Influence of Cr2O3 on the Sulfur Capture Efficiency of CaO in Pulverized Coal Combustion Process

2014 ◽  
Vol 997 ◽  
pp. 332-336
Author(s):  
Sheng Qin Zhang ◽  
Guang Jun Zhu ◽  
Neng Yun Deng ◽  
Yan Hong Gao
Keyword(s):  
Coal Combustion ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Capture Efficiency ◽  
The Other ◽  
Pulverized Coal Combustion ◽  
Other Hand ◽  
The One ◽  
Sulfur Capture

The effects of Ca-based sulfur catcher on sulfur fixing were investigated by experiments. The results indicate that sulfur capture efficiency of CaO is the maximum when n(CaO)/n(S) ratio is equal to 2.5. Moreover, the influences of Cr2O3 on sulfur-fixing of CaO were studied when n(CaO)/n(S) ratio is equal to 2.5. The results indicate that addition of Cr2O3 can improve the sulfur capture efficiency of CaO, and efficiency of CaO is the best when Cr2O3 is added to 0.5%. This is because that Cr2O3 can be oxidized to CrO2. On the one hand, the oxides of chromium can catalyze the reaction of sulfur-fixing. On the other hand, CrO2 can react with SO2 to form Cr2(SO4)3. These also can improve the sulfur capture efficiency of Ca-based sulfur catchers.

Influence of Chlorine Additives on Combustion Rate of Pulverized Coal Injection

2015 ◽  
Vol 1088 ◽  
pp. 120-123
Author(s):  
Bing Qiang Wu ◽  
Shu Hui Zhang ◽  
Xiao Jie Liu ◽  
Ya Na Qie ◽  
Qing Lv
Keyword(s):  
Combustion Rate ◽  
Coal Combustion ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion ◽  
Pulverized Coal Injection ◽  
Influence Mechanism ◽  
Coal Injection ◽  
Average Size ◽  
Addition Amount

Chlorine additives are often used to improve the combustion performance of pulverized coal injection (PCI) in blast furnace. The influence of chlorine additives on pulverized coal combustion rate was analyzed and the micrograph of unburned pulverized coal (UPC) was observed by SEM in order to analyze the influence mechanism of chlorine additives. The results show that proper addition amount of CaCl2, NaCl, MgCl2and FeCl3respectively promotes pulverized coal combustion in different degrees. The average size of UPC is smaller and the micrograph becomes irregular when the chlorine additives are increased. While beyond the appropriate addition amount, the combustion rate of PCI reduces. During the combustion process of pulverized coal with chlorine additives, HCl is produced which prevents the combustion process.

Evaluation of influence of ammonia-coal co-combustion on the pulverized coal combustion process by LIF in a laminar counterflow burner

2018 ◽  
Vol 2018.93 (0) ◽  
pp. 106
Author(s):  
Junpei FUKUI ◽  
Noriaki NAKATSUKA ◽  
Kazuki TAINAKA ◽  
Hidetaka HIGASHINO ◽  
Jun HAYASHI ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion

INFLUENCE OF PARTICLE SIZE IN A PULVERIZED COAL COMBUSTION PROCESS OF A REAL 160 MW POWER PLANT'S BOILER

2015 ◽  
Author(s):  
Conrado Ermel ◽  
Leandro Luis Felipetto ◽  
Gian Marcos Gatti ◽  
Cristiano Vitorino da Silva
Keyword(s):  
Particle Size ◽  
Coal Combustion ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion

Numerical Simulation Research on Coal Combustion

2013 ◽  
Vol 742 ◽  
pp. 501-505
Author(s):  
Li Xia Ren ◽  
Hong Wei Lu ◽  
Peng Du
Keyword(s):  
Working Conditions ◽  
Coal Combustion ◽  
Combustion Process ◽  
Pulverized Coal ◽  
Engineering Practice ◽  
Pulverized Coal Combustion ◽  
Simulation Research ◽  
Simulation Results ◽  
The Comparative Study ◽  
Combustion Processes

The comparative study of numerical results on pulverized coal combustion process with CFD has become an important measure for direct engineering practice. In this paper, a combustion facility was simulated numerically with the Fluent code to investigate the process of coal combustion. Firstly, geometric models, grid and boundary type were established in the Gambit. Secondly, required models, physical properties and working conditions were chosen in the solver. Then, the important diagrams of each component displayed distinctly in the post professor. The simulation results showed that the rules of the volatile releasing and combustion processes of coke could provide important references to improve the combustion of the pulverized coal.

scholarly journals PULVERIZED COAL COMBUSTION ADVANCED CONTROL TECHNIQUES

2019 ◽  
Vol 9 (2) ◽  
pp. 41-45
Author(s):  
Konrad Gromaszek
Keyword(s):  
Coal Combustion ◽  
Combustion Process ◽  
Diagnostic System ◽  
Pulverized Coal ◽  
Prognostic Models ◽  
Pulverized Coal Combustion ◽  
Industrial Practice ◽  
Optical Diagnostic ◽  
Advanced Control ◽  
Power Boiler

The paper describes the selected methods of adaptive control of the pulverized coal combustion process overview with various types of prognostic models. It was proposed to use a class of control methods that are relatively well established in industrial practice. The presented approach distinguishes the use of an additional source of information in the form of signals from an optical diagnostic system and models based on selected deep structures of recurrent networks. The research aim is to increase the efficiency of the combustion process in the power boiler, taking into account the EU emission standards, leading in consequence to sustainable energy and sustainable environmental engineering.

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