scholarly journals Bottom Ash of the Largest Kuzbass Coal Power Plants: Secondary Use Possibility

2021 ◽  
Vol 315 ◽  
pp. 02012
Author(s):  
Aleksey Kargin ◽  
Nikolay Mashkin
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Building Materials ◽  
Activity Index ◽  
Bottom Ash ◽  
Raw Material ◽  
Coal Power Plant ◽  
Secondary Use ◽  
Coal Power Plants ◽  
Coal Power

Kemerovo district coal power plant, Tom-Usinskaya district coal power plant and Belovo district coal power plant are the largest coal power plants in Kuzbass and during the combustion of coal they generate annually about 1600 tons of coal ash which consists of fly ash and bottom ash. Almost all the generated ash is disposed into ash dumps except a small quantity of fly ash (3.5%) that is effectively utilized. Therefore, secondary use of the bottom ash can be a sustainable solution for reducing its by-products and overcoming the scarcity of raw materials required for construction work. Therefore, the main aim of this research was to determine the chemical composition and granulometric properties of bottom ash to find out the possibility of using it as raw material for the building materials production. A series of laboratory experiments were conducted to determine basicity index, activity index, average grain density, bulk density, true density and grain size distribution. The experimental results reveal that the particle size of ash is predominantly sand-sized while containing some silt-sized and rubble-sized fractions as well. The studied bottom ash has a low basicity and activity index, respectively, does not have independent hydraulic activity. Thus, bottom ash of the largest Kuzbass coal power plants can be used as raw material for the building materials production.

Properties of Artificial Lightweight Aggregate by Using Magnetic Separated Bottom Ash from Coal Power Plant

2012 ◽  
Vol 724 ◽  
pp. 103-106
Author(s):  
Yoo Taek Kim ◽  
Chang Sub Jang ◽  
Yun Jae Choi
Keyword(s):  
Power Plants ◽  
Raw Materials ◽  
Bottom Ash ◽  
Lightweight Aggregate ◽  
Raw Material ◽  
Dredged Soil ◽  
Magnetic Components ◽  
Coal Power Plants ◽  
Coal Power ◽  
Lower Bulk Density

This study was conducted to evaluate the feasibility of using bottom ash after magnetic separation and dredged soil from the coal power plants as raw materials for artificial lightweight aggregate (ALA). The dependence of composition and sintering temperature on physical properties of ALA was investigated. Fe compounds play an important role in the bloating reaction, thus specimens containing more ferrous materials such as Fe3O4 are more easily bloated. Both black core region and bloating phenomenon were increased with an increase in the contents of dredged soil. Specimens made use of MBA(Magnetic separated bottom ash which has magnetic components) showed lower bulk density than those of NMBA(non-magnetic separated bottom ash which has much less ferrous materials. It was confirmed that MBA could be used as an effective raw material for making ALA having low density because the ferrous components in it act as bloating agents.

scholarly journals Residents’ Cognition and Behavior Related to Eco-Environmental Risks from the Development of Large Coal Power Plants: A Case Study in Xilinhot, Inner Mongolia

2021 ◽  
Vol 13 (14) ◽  
pp. 7813
Author(s):  
Yan Ma ◽  
Yan Ma ◽  
Zhiguo Cao ◽  
Shuyi Li ◽  
Bowen Lv ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Field Research ◽  
Environmental Risks ◽  
Adaptive Behaviors ◽  
Coal Power Plant ◽  
Coal Power Plants ◽  
Coal Power ◽  
Questionnaire Surveys ◽  
And Behavior

The development of large coal power plants is often accompanied by environmental pollution, thereby influencing the lives of the surrounding residents, resulting in a “not-in-my-backyard” effect and associated social injustice. To mitigate these influences, we conducted field research and questionnaire surveys with individuals living in areas around the Xilinhot coal power plant to explore their cognitive and behavioral psychological changes in response to the environmental risks of the coal power plant and the factors influencing such changes. A “cognition-perception-behavior” model was constructed for residents coping with the ecological environment influenced by the development of the coal power plant. Cognition of eco-environmental risks had a significant effect on the perception of eco-environmental risks which, in turn, significantly promoted the adoption of adaptive behaviors. Residents had a strong cognition and perception of eco-environmental risks but an extremely low likelihood of adopting relevant adaptive behaviors. Thus, affective responses can increase the residents’ cognition and perception of eco-environmental risks, and the communication of risk information can help them evaluate eco-environmental risks rationally.

scholarly journals The Effect of the Carbon Tax Value on the Optimal Parameters and Characteristics of Coal Power Plants

2020 ◽  
Vol 24 (3) ◽  
pp. 104-111
Author(s):  
Alexander Kler ◽  
Pavel Zharkov ◽  
Yulia Potanina ◽  
Andrey Marinchenko ◽  
Nikolai Epishkin
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Carbon Tax ◽  
Environmental Indicators ◽  
Steam Boiler ◽  
Optimal Parameters ◽  
Specific Investment ◽  
Investment Optimization ◽  
Coal Power Plants ◽  
Coal Power

AbstractThe paper investigates the effect of the carbon tax on the optimal parameters and indicators of two coal power plants: a steam turbine power unit with coal dust burning in a steam boiler and an internal gasification combined cycle power plant. Sufficiently detailed mathematical models have been developed for the considered plants that are focused on calculating the flow rates of working fluids and coolants and thermodynamic parameters at all points of the flowcharts, as well as the structural characteristics of the plant elements. The problems of optimizing the parameters of these plants related to the problems of nonlinear mathematical programming are formulated. As an efficiency criterion, the price of electricity is used at given value of the internal rate of return on investment. Optimization calculations were carried out with a carbon tax in the range from 0 $/t to 140 $/t in increments of 20 $/t. It is shown that with an increase in the charge for emissions, the optimal efficiency of the plants increases, as well as the specific investment. Specific CO2 emissions are reduced. Throughout the entire range of carbon tax values, IGCC power plant has the best economic and environmental indicators.

Construction of Energy Conservation and Emission Reduction Evaluation Index System in Coal-Fired Power Plants and its Application

2014 ◽  
Vol 962-965 ◽  
pp. 1875-1878
Author(s):  
Qing Xin Fan ◽  
Jin Meng Li ◽  
Wei Qiu
Keyword(s):  
Power Plant ◽  
Energy Conservation ◽  
Index System ◽  
Emission Reduction ◽  
Power Plants ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Analytic Hierarchy ◽  
Coal Power Plant ◽  
Coal Power

According to the analysis of coal-fired power plants, the article built the evaluation index system of coal-fired power plants energy conservation and emission reduction. Based on analytic hierarchy process (AHP), we determined the weight of each evaluation index. By using the calculation of rating scores in cleaner production, we set up a model of energy conservation and emission reduction for coal-fired power plants. On the basis of the results, the level of coal-fired power plants energy conservation and emission reduction was divided into five levels: excellent, good, medium, pass and fail. Taking a coal-power plant in Heilongjiang Province as an example, we drew a conclusion that the score of energy conservation and emission reduction in the coal-power plant was 89.52 which represents the good level. According to the evaluation result, we proposed corresponding suggestions. The results provide decision-makers with ideas and methods for energy conservation and emission reduction evaluation in the coal-fired power plant.

scholarly journals Potential usage of fly and bottom ash from thermal power plant ”Nikola Tesla” landfill, Serbia

2012 ◽  
Vol 66 (3) ◽  
pp. 403-412 ◽  
Author(s):  
Miodrag Zivotic ◽  
Dragoslava Stojiljkovic ◽  
Aleksandar Jovovic ◽  
Vladica Cudic
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
Raw Material ◽  
Steel Mill ◽  
Waste Discharge ◽  
Nikola Tesla ◽  
Cement Mixture

In Serbia, the ash from power plants has long been labelled as hazardous waste. With the adoption of the appropriate legislation this ash became secondary raw material with the potential usage. In this paper an analysis of the fly and bottom ash composition, which are disposed of in the power plant ?Nikola Tesla A? landfill, is presented. Thirty samples, divided into three sets, were analyzed for trace elements As, Ba, Be, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Ti, V and Zn. The first and second set of samples were taken at the depth of 0.0-0.6 m, from cassette III, at the place of waste discharge (set I) and in the centre of the cassette (set II).The third set of samples was taken from the same cassette spot but at the different depth. The estimated variations in quality within individual sets, as well as the comparison between sets I and II, were done. The repeatability of results by the depth of cassette (set III) was also analyzed. The mixture consisting of 79.4% limestone, 17% clay, 0.5% sand, 0.55% iron ore, 0.55% from steel mill waste and 2% ash from the thermal power plant "Nikola Tesla A" was adopted as the reputable mixture for cement making. For concrete making, the same cement mixture was used but with 2.1% of the same ash material added. The results showed possibility of further fly and bottom ash use as the cement and concrete material.

scholarly journals Experimental study applied to the lime hydration process, in a thermoelectric coal power plant unit

2020 ◽  
Author(s):  
Rodrigo Saraiva Dantas ◽  
Maria Alejandra Liendo ◽  
Vera Lucia Duarte Ferreira ◽  
Rodrigo Bortoluzzi
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Hydrated Lime ◽  
Hydration Process ◽  
Maximum Temperature ◽  
Main Process ◽  
Coal Power Plants ◽  
Coal Power ◽  
The Impact

Abstract Coal Power Plants need to control SO 2 emissions to the atmosphere from the boiler flue gases, in order to reach standards according to guidelines determined by the Conselho Nacional de Meio Ambiente - CONAMA. For this purpose hydrated lime is used, which is, in fact, produced from lime at the power plant. Hydrated lime is injected into the equipment called desulphuriser that operates capturing the sulfur dioxide from the boiler flue gas. Due to the importance of this process, the present work aimed to evaluate several points that involve: the production of hydrated lime from lime, the analysis of the quality of lime received, the study of the hydration process. Moreover it was evaluated the impact of the temperature of reaction through to the hydration efficiency according to the methodology and routine proposed. In addition, complementary analysis were carried out on the characterization of lime and hydrated lime and the correlation between the main process parameters measured and recorded in lime hydration control system. In relation to the results of hydration efficiency, it was possible to observe its increase when the maximum temperature of the reaction stage was lower, reaching results up to 85%.

scholarly journals Increasing flexibility of coal power plant by control system modifications

2016 ◽  
Vol 20 (4) ◽  
pp. 1161-1169 ◽  
Author(s):  
Ante Marusic ◽  
Drazen Loncar ◽  
Jakov Batelic ◽  
Valdi Frankovic
Keyword(s):  
Control System ◽  
Thermal Stress ◽  
Power Plant ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Steam Temperature ◽  
Coal Power Plant ◽  
Safety Margins ◽  
Coal Power

Expanding implementation of intermittent renewable energy sources has already started to change the role of thermal power plants in energy systems across Europe. Traditionally base load plants are now forced to operate as peaking plants. A familiar transition in upcoming years is expected in Croatia and coal power plant operators are preparing accordingly. To evaluate cycling capabilities and control system operation for flexible operation of selected 210 MW coal plant, series of tests with different load gradients were performed and results were thoroughly analyzed. Two possible ?bottlenecks? are identified, thermal stress in superheater header, and achievable ramping rate considering operational limitations of coal feeders, firing system and evaporator dynamics. Several unexpected readings were observed, usually caused by malfunctioning sensors and equipment, resulting in unexpected oscillations of superheated steam temperature. Based on superheater geometry and experimental data, maximal steam temperature gradient during ramping was evaluated. Since thermal stress was well inside the safety margins, the simulation model of the whole boiler was used to evaluate achievable ramping on electric side.

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