Energy, exergy, sustainability and environmental emission analysis of coal-fired thermal power plant

Kumar, Vineet; Saxena, V. K.; Kumar, Rakesh; Kumar, Shravan

doi:10.1016/j.asej.2023.102416

Cited by 11 publications

(1 citation statement)

References 30 publications

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“…In areas of coal basins and extreme continental climate characterized by cold and long winters, coal continues to be used as the main energy fuel due to its low cost and high calorific value compared to other types of solid fuels. Coal combustion emits a large amount of NO x , SO x and other harmful substances, including fine ash particles and CO 2 [11][12][13][14]. The method proposed and implemented in many countries, which consists in adding various biomass wastes to coal, has proved to be a way out of a difficult situation that can lead to the shutdown of a coal-fired boiler or thermal power plant due to high levels of harmful emissions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Combustion of Different Biomass Wastes, Coals and Two Fuel Mixtures on a Fire Bench

Zhuikov,

Zemlyanskiy,

Grishina

et al. 2024

Sustainability

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When designing settlements according to the “Green Building” principle, it is necessary to develop a heating system based on climatic conditions. For example, in areas with a sharply continental climate (cold and prolonged winters), it is sometimes necessary to use solid fuel boilers (in the absence of gas). However, to use these, it is necessary to use biomass or biomass-coal blends as fuel to increase their combustion heat. The addition of biomass waste to coal can be aimed at achieving various objectives: utilization of biomass waste; reduction of solid fossil fuel consumption; improvement of environmental performance at coal-fired boiler houses; improvement of the reactivity of coals or to improve the technical and economic performance of heat-generating plants due to the fact that biomass is a waste from various types of production, and its cost depends only on the distance of its transportation to the boiler house. In this work, combustion of various biomass wastes, including sewage sludge, was carried out on a fire bench emulating the operation of a boiler furnace. Fuel particles were ignited by convective heat transfer in a stream of hot air at a velocity of 5 m/s in the temperature range of 500–800 °C, and the experimental process was recorded on a high-speed, color video camera. The obtained values were compared with the characteristics of different coals used in thermal power generation (lignite and bituminous coal). The aim of the work is to determine the reactivity of various types of biomass, including fuel mixtures based on coal and food waste. The work presents the results of technical and elemental analysis of the researched fuels. Scanning electron microscopy was used to analyze the fuel particle surfaces for the presence of pores, cracks and channels. It was found that the lowest ignition delay is characteristic of cedar needles and hydrolyzed lignin; it is four times less than that of lignite coal and nine times less than that of bituminous coal. The addition of hydrolysis lignin to coal improves its combustion characteristics, while the addition of brewer’s spent grain, on the contrary, reduces it, increasing the ignition time delay due to the high moisture content of the fuel particles.

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Section: Introductionmentioning

confidence: 99%