scholarly journals Physical and chemical characteristics of flue-gas particles in a large pulverized fuel-fired power plant boiler during co-combustion of coal and wood pellets

2017 ◽  
Vol 176 ◽  
pp. 554-566 ◽  
Author(s):  
Fanni Mylläri ◽  
Panu Karjalainen ◽  
Raili Taipale ◽  
Pami Aalto ◽  
Anna Häyrinen ◽  
...  
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Chemical Characteristics ◽  
Wood Pellets ◽  
Physical And Chemical Characteristics ◽  
Power Plant Boiler ◽  
Pulverized Fuel ◽  
Physical And Chemical ◽  
Plant Boiler

Mineralogy and Physical and Chemical Characteristics of Coal Ash from Yang Zonghai Power Plant

2010 ◽  
Vol 177 ◽  
pp. 497-501
Author(s):  
Feng Rui Zhai ◽  
Zhong Zhou Yi ◽  
Qun Cai ◽  
Huan Bin Song ◽  
Li Li Zhang ◽  
...  
Keyword(s):  
Power Plant ◽  
Particle Diameter ◽  
Coal Ash ◽  
Chemical Characteristics ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Physical And Chemical Characteristics ◽  
Coal Ashes ◽  
Physical And Chemical

The modality, physical and chemical characteristics, mineralogy and distribution of particle size of coal ash were studied by modern analytic technology SEM, spectral analysis, X - ray Diffraction (XRD) and laser granularity analyzer. The test results show that the mineralogy of coal ashes is dominated mainly by mullite, quartz and hematite.The coal ash of Yang Zonghai power plant has lower content of calcium oxide and is low calcium ash.At the same time, the losing amount is low to burn.The particle diameter is small and mainly concentrates on the range of 1-40 m.

A Model for Combustion Losses in a Pulverized Fuel Fired Power Plant Boiler

1988 ◽  
Vol 202 (4) ◽  
pp. 215-224
Author(s):  
V Krishna ◽  
P B Sharma
Keyword(s):  
Particle Size ◽  
Power Plant ◽  
Heat Rate ◽  
Average Particle ◽  
Fuel Particle ◽  
Excess Air ◽  
Power Plant Boiler ◽  
Boiler Efficiency ◽  
Pulverized Fuel ◽  
Plant Boiler

A model for the estimation of combustion losses in a pulverized fuel power plant boiler is presented. The model is based on the formulation of a probability density function which relates the probability of a fuel particle remaining unburnt to the combustion and resident times. An empirical model is also presented which relates the unburnt carbon loss to average particle size and excess air. The two models are shown to be in close agreement with each other. The models are validated from the experiments on a power plant boiler. The dependence of boiler efficiency on particle size and excess air is also examined and an empirical correlation between optimum excess air and particle size is derived. The mechanism of two-way coupling between boiler and turbine side parameters is also illustrated. It has been shown that the optimum excess air levels for maxima in plant heat rate and boiler efficiency are not the same, since the two-way coupling influences both the turbine heat rate and boiler efficiency. The effect of two-way coupling has been found to be more predominant for particle sizes of the order of 200 μm.

Analysis of Flue-Gas Side Abrasion in Thermal Power Plant Boiler

2011 ◽  
Vol 418-420 ◽  
pp. 987-992
Author(s):  
Yong Yan Zhou ◽  
Yong Fu Zhao ◽  
Tian Sheng Chen ◽  
Guo Hua Lu
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Influence Factors ◽  
Power Plant Boiler ◽  
Prevention Methods ◽  
Plant Boiler

Several different kinds of flue-gas side abrasions occurred in thermal power plant were discussed. And the occurring positions, characteristics, influence factors as well as identification and prevention methods were also introduced in detail. So some advice may serve a reference for efficiently identificating and preventing boiler failure caused by flue-gas side abrasion.

Research and Governance on Catalyst Abrasion for Selective Catalytic Reduction (SCR) System in Power Plant Boiler

2014 ◽  
Vol 1023 ◽  
pp. 125-131
Author(s):  
Li Ming Ren ◽  
Lei Wang ◽  
Chun Yu Wang ◽  
Jing Xue An
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Field Experiment ◽  
Selective Catalytic Reduction ◽  
Flue Gas ◽  
Preliminary Analysis ◽  
Catalytic Reduction ◽  
Power Plant Boiler ◽  
Scr System ◽  
Plant Boiler

This paper presents a research on the problem of catalyst failure in a selective catalytic reduction (SCR) system. The preliminary analysis indicates that the catalyst failure is caused by abrasion. For this, firstly, the mechanism of abrasion is analyzed through a field experiment. Secondly, according to the results from the field experiment, a scheme is put forward to optimize the flow field. Finally, the application results show that the uniformity of fly ash distribution in the flue gas are improved prominently, the reliability of the SCR system is enhanced at the same time.

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