scholarly journals Enhancement of Technical and Economic Indicators of Power-Generating Units of Thermal Power Plants by Eliminating Flue Gas Recirculation

2021 ◽  
Vol 7 (1) ◽  
pp. 26-31
Author(s):  
Taras Kravets ◽  
◽  
Yevhen Miroshnychenko ◽  
Andrii Kapustianskyi ◽  
◽  
...  
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Gas Flow ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Boiler Furnace ◽  
Short Run ◽  
Boiler Units ◽  
Coal Drying ◽  
Efficiency Indicators

Boiler units at Ukrainian thermal power plants need to be modernized or replaced in the short run, as this is important for the national energy security. The authors determined one of possible ways to improve the efficiency indicators of coal-fired boiler units and power generating units as a whole up to the values exceeding the design ones. This variant of improvement consists in abandoning the technology of using flue gas as drying agent in pulverized coal systems and replacing it with direct discharge of the gas flow into the boiler furnace. Numerous computations were carried out to study the change of efficiency indicators and manoeuvrability of power generating units due to the replacement of the ball mill pulverizing system using flue gases for coal drying with the scheme including ball-and-race mills that use hot air as drying agent.

Development Prospects of Non-Thermal Plasma Technology Used in the Thermal Power Plants in China

2009 ◽  
Author(s):  
Bao-Ming Sun ◽  
Shui-e Yin ◽  
Xu-Dong Gao
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Thermal Plasma ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Plasma Technology ◽  
Integration Technology ◽  
Non Thermal Plasma ◽  
Thermal Plasma Technology

This paper mainly seeks to explore and answer some questions for desulfurization and denitration in thermal power plants in China. Firstly, the desulfurization and denitration technology applicated in the power plant in China at present were analyzed. It is considered that taken combination of the existed technique for purified the pollutants from the thermal power plants, not only lead to the wastage of huge amount of investment, increasing of operating costs, decreasing of the economic benefits, but also add an additional area. It is necessary to develop the integration technology of desulfurization and denitration simultaneously. Secondly the integration technology of desulfurization and denitration at present in China was briefly reviewed such as activated carbon adsorption, SNRB, etc. and most of those at a research stage include the plasma technology. In the third of the paper, the non-thermal plasma technology i.e electron-beam technique, corona discharge and dielectric barrier discharge were discussed. Finally, combined with the actual situation in China, the application prospects of the desulfurization and denitration technology using plasma discharge in the flue gas was bring up. The article also pointed out the barriers need to be overcome if the technology will be applied in power plant, as well as the development direction of desulfurization and denitration technology from flue gas in power plant in China.

scholarly journals Complex flue gas cleaning of thermal power plants

2021 ◽  
Vol 808 (1) ◽  
pp. 012017
Author(s):  
D S Protsko ◽  
S Yu Panov ◽  
N N Lobachova ◽  
S V Lavrov ◽  
A S Belozercev
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Gas Cleaning

scholarly journals AN ALTERNATIVE SOLUTION TO ESP RECONSTRUCTION FOR THE COAL FIRING THERMAL POWER PLANTS

2017 ◽  
pp. 49-55
Author(s):  
I.A. Volchyn ◽  
O.M. Kolomiets ◽  
V.A. Raschepkin
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Power Plants ◽  
Electrostatic Precipitator ◽  
Thermal Power ◽  
Distribution Functions ◽  
Thermal Power Plants ◽  
Particle Size Distributions ◽  
Gas Cleaning ◽  
Battery Cyclone

The mathematical modeling is performed of the efficiency of flue gas cleaning from fly ash particles of coal-fired thermal power plants, upon installation of a preliminary flue gas cleaning system that consists of a louvered dust concentrator and a battery cyclone, with the recirculation of flue gas from the battery cyclone outlet to the electrostatic precipitator pre-chamber. Based on the available experimental data for the fractional composition of fly ash downstream the boilers of coal-fired TPPs, the size distribution functions were calculated, of fly ash particles at each stage of the preliminary dust-cleaning process, as well as concentrations and modified particle size distributions, to be further used as the input data for designing options and scope of the reconstruction of existing electrostatic precipitators. Bibl. 13, Fig. 3.

The Abrasive Properties of Coal Power Plants Ash and Slag Materials

2020 ◽  
Vol 299 ◽  
pp. 845-851
Author(s):  
Yury V. Shcheglov ◽  
Natalia V. Fedorova ◽  
Dmitry A. Shaforost
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Industrial Applications ◽  
Thermal Power Plants ◽  
Empirical Formulas ◽  
Slag Removal ◽  
Abrasive Properties ◽  
Coal Slag ◽  
Coal Power Plants ◽  
Boiler Units

Ash and slag materials (ASM), formed during the combustion of coal in thermal power plants, have abrasive properties, which are manifested during the operation of boiler units, ash collection, ash and slag removal. These properties must be considered to ensure durable trouble-free operation of thermal power plants. On the other hand, these properties can be used when planning measures for ash and slag material disposal. The results of experimental-industrial tests of ash and slag materials abrasive properties are presented in this paper. It was shown that, when cleaning metal surfaces of various shapes from old paint coatings, the consumption of crushed coal slag per 1 m2 of the surface being treated is on average 4.8 times less than the consumption of sand, the time of surface treatment with slag is on average 2.45 times less than with the use of sand in similar conditions. The empirical formulas to evaluate the technical and economic efficiency of using ash and slag materials as an abrasive in industrial applications are given.

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