Application of Reversed Modeling in the Measurement of the Power Plant Unburned Carbon in Fly Ash

2010 ◽  
Author(s):  
Zhongguang Fu ◽  
Tao Jin ◽  
Guoqiang Yang
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Coupling Model ◽  
Optimal Operation ◽  
Unburned Carbon ◽  
Least Squares Regression ◽  
Coal Quality ◽  
Coupling Characteristics ◽  
Non Linear System ◽  
The Impact

In the paper, the research on reversed modeling method and its application with operation data of power plant is presented with the consideration of nonlinear and multiple coupling characteristics of thermal system in large capacity of power plant. The paper focus on the partial least-squares regression and artificial neural networks method which were studied based on data-driven model. The PLS-ANN coupling model was proposed. The paper aimed at modeling of unburned carbon in fly ash occurred in the operation of power generating units. Finally, the unburned carbon in fly ash model based on PLS regression and ANN method was built under the consideration of the advantages of the above models. The simulation results indicated that the presented coupling model is good at the model of non-linear system with the characteristics of higher computing speed as well as high precision. By presented model, the analysis of the impact of the unburned carbon in fly ash could be carried out in consideration of the changes of operating parameters as well as coal quality. The model could also be expected to be used in guiding of the optimal operation of power plant boiler.

CHARACTERIZATION OF FLY ASH FROM COAL-FIRED POWER PLANT AND THEIR PROPERTIES OF MERCURY RETENTION

2015 ◽  
Vol 22 (02) ◽  
pp. 1550018 ◽  
Author(s):  
PING HE ◽  
XIUMIN JIANG ◽  
JIANG WU ◽  
WEIGUO PAN ◽  
JIANXING REN
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Power Plant ◽  
Experimental Studies ◽  
Size Fraction ◽  
Elemental Mercury ◽  
Unburned Carbon ◽  
Retention Capacity ◽  
Size Fractions ◽  
X Ray

Recent research has shown that fly ash may catalyze the oxidation of elemental mercury and facilitate its removal. However, the nature of mercury-fly ash interaction is still unknown, and the mechanism of mercury retention in fly ash needs to be investigated more thoroughly. In this work, a fly ash from a coal-fired power plant is used to characterize the inorganic and organic constituents and then evaluate its mercury retention capacities. The as-received fly ash sample is mechanically sieved to obtain five size fractions. Their characteristics are examined by loss on ignition (LOI), scanning electron microscope (SEM), energy dispersive X-ray detector (EDX), X-ray diffraction (XRD), and Raman spectra. The results show that the unburned carbon (UBC) content and UBC structural ordering decrease with a decreasing particle size for the five ashes. The morphologies of different size fractions of as-received fly ash change from the glass microspheres to irregular shapes as the particle size increases, but there is no correlation between particle size and mineralogical compositions in each size fraction. The adsorption experimental studies show that the mercury-retention capacity of fly ash depends on the particle size, UBC, and the type of inorganic constituents. Mercury retention of the types of sp2 carbon is similar to that of sp3 carbon.

scholarly journals Intelligent monitoring system of unburned carbon of fly ash for coal fired power plant boiler

2017 ◽  
Vol 131 ◽  
pp. 02003
Author(s):  
Pogganeswaran Gurusingam ◽  
Firas Basim Ismail ◽  
Prem Gunnasegaran ◽  
Taneshwaren Sundaram
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Monitoring System ◽  
Unburned Carbon ◽  
Intelligent Monitoring ◽  
Power Plant Boiler ◽  
Plant Boiler

Influence of Temperature Parameter Change on Lithium Bromide Absorption Heat Pump Performance

2013 ◽  
Vol 291-294 ◽  
pp. 1670-1674
Author(s):  
Biao Li ◽  
Jiang Fan
Keyword(s):  
Power Plant ◽  
Heat Pump ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Optimal Operation ◽  
Pump System ◽  
Absorption Heat Pump ◽  
Heat Pump System ◽  
Heat Pump Unit ◽  
The Impact

It is the new way of the thermal power plant energy conservation to recycling plant circulating water waste heat for heating with the heat pump technology. The recovery of low temperature waste heat is the background. And lithium bromide absorption heat pump is the object of this study. The impact of changes in temperature parameters on the performance of heat pump unit is analyzed. As a theoretical basis for the design of the heat pump system and power plant heat pump unit’s optimal operation provide a reference. The result provides a theoretical reference for the optimal operation of the heat pump system design and power plant heat pump units.

Experimental Study of Mercury Releasing Characteristics of Coal Fly Ash under Mild Thermal Condition

2012 ◽  
Vol 424-425 ◽  
pp. 1258-1261
Author(s):  
Yu Ran Cai ◽  
Wei Feng Xu ◽  
Jiang Wu ◽  
Kan Zhu ◽  
Zhou Shi ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Power Plant ◽  
Thermal Condition ◽  
Coal Fly Ash ◽  
Eastern China ◽  
Elemental Mercury ◽  
Unburned Carbon ◽  
Mercury Emissions ◽  
Second Peak

Under mild thermal condition, mercury releasing characteristics and its morphological features transformation of fly ash sample, which is obtained from the exit of air pre-heater of one power plant in eastern China, has been studied in the paper. The experiment shows that under mild thermal condition, the temperature range of fly ash mercury releasing is about 200 °C ~ 800 °C. It reaches the first peak at about 300 °C and it reaches the second peak at about 600°C. Moreover, most sample elemental mercury is Hg0. The fly ash sample in which mercury emissions and unburned carbon content have no obvious relationship.

Influence of unburned carbon on mercury chemical forms in fly ash produced from a coal-fired power plant

Fuel ◽  
2021 ◽  
Vol 300 ◽  
pp. 120802
Author(s):  
Dorcas L.E. Uaciquete ◽  
Kosuke Sakusabe ◽  
Takahiro Kato ◽  
Hirokazu Okawa ◽  
Katsuyasu Sugawara ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Unburned Carbon ◽  
Chemical Forms

scholarly journals Study of Knowledge, Attitude and Action of Buffalo Breeders in the Villages Around Nagan Raya Power Plant on the Impact of Fly Ash Exposure

2018 ◽  
Vol 3 (2) ◽  
pp. 43-48
Author(s):  
Ira Susanti ◽  
Rinidar Rinidar ◽  
Sugito Sugito
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Coal Fly Ash ◽  
Animal Health ◽  
Low Rank ◽  
Chi Square ◽  
Cross Sectional ◽  
Chi Square Test ◽  
Cross Sectional Design ◽  
The Impact

One of the biggest contributors of air pollution is the production of coal fly ash from power plant industry. Fly ash has an immediate impact on human and animal health around the power plant. Many buffaloes in Nagan Raya usually grazing near the 110-megawatt steam power plant that using low rank coal. This action raises concerns about buffalo’s health due to exposure to fly ash. This study aimed to examine the relationship of knowledge, attitude and action of buffalo breeders to the impact of fly ash exposure on the buffaloes. This research used analytical survey with cross sectional design. This study was conducted in February 2018 with 30 respondents from four villages around Nagan Raya Power Plant to evaluate their knowledge, attitudes and actions by using questionnaires. The data were analyzed statistically with Chi Square Test with SPSS for Windows version 17.0. The results showed that there was no significant correlation between the knowledge of buffalo breeders and the impact of fly ash exposure (P> 0.05), while the attitude and actions of buffalo breeders had a significant correlation with the impact of fly ash exposure (P <0.05). These results concluded that the buffalo breeders in the villages around the power plant did not realize the impact of fly ash arising from coal of power plant. It is expected that the associated institution would conduct a counseling about the impact of fly ash exposure as well as good management of buffaloes.

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