Actions to Reduce Air Pollution From a Coal Thermal Power Plant

Valea, Emilian Stefan; Sârbu, Ioan

doi:10.30638/eemj.2013.055

Cited by 2 publications

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“…In recent years, much attention has been paid to solving the environmental problems in the fuel industry and thermal power engineering, − which are due to high anthropogenic emissions (primarily sulfur and nitrogen oxides, as well as fly ash of the micron fractions) from coal combustion, large ash disposal areas, and open storage facilities for coal waste storage. The main advantages of coal fuels in comparison with oil and gas are relatively low cost, large reserves in different regions of the world, and low cost of their preparation for combustion.…”

Section: Introductionmentioning

confidence: 99%

A Mathematical Model for Processes in Coal–Water Slurries Containing Petrochemicals under Heating

2018

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One of the promising directions for improving the environmental, technical, and economic efficiency of coal-fired thermal power plants is the use of the multicomponent fuels based on coal and combustible liquids. Such fuels, as a rule, are called coal–water slurries containing petrochemicals (CWSPs). The typical wastes of coal enrichment, low-grade coals, oil production, and oil refining wastes as well as used flammable liquids, for example oils, can be included in the fuel composition. To date, mathematical models have not been developed for predicting the effective conditions for the ignition of promising CWSPs at minimum ambient temperatures and with short ignition delay times. This problem was solved in the present work. On the basis of the experimental results, three modes of physical and chemical transformations were established when heating single particles of the composite fuel. The first one is the intensive thermal decomposition of the coal component after evaporation of the liquid components of the fuel. Then goes the gasification of coal under the boiling conditions of the liquid components followed by the heterogeneous combustion of the solid residue. The third mode is the ignition of the gas mixture in the vicinity of the fuel particle and initiation of heterogeneous combustion of the solid residue. The temperature ranges of the environment were determined under which the detected modes of the physical and chemical transformations occur. The obtained experimental data became the basis for the development of a predictive mathematical model of the transformations that occur when heating a composite fuel with different characteristics of the components. It takes into account the interrelated physical and chemical processes: inert heating, evaporation, thermal decomposition, and exothermic reaction. The developed mathematical model and the results of the theoretical studies make it possible to establish the influence of the characteristics of the fuel components and the conditions of its heating on the three identified modes of physical and chemical transformations.

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Section: Introductionmentioning

confidence: 99%

A Mathematical Model for Processes in Coal–Water Slurries Containing Petrochemicals under Heating

2018

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Environmental and Occupational Impact on Human Health of Dust and Chemicals From Modern Technologies

Traumann

Reinhold

Tint

2014

Environ. Eng. Manag. J.

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The paper concentrates on the risks of modern technologies (in wood processing and metal industry, spray-painting processes and car washing technologies) in the industrial and office environments on human health. The problems discussed are the following: fine dust (PM 2.5 and PM 1.0 ) penetrating deeply into the lungs; high concentration of carbon dioxide in the air of cities and office areas that are situated close to the transport junctions. The health damages can be described as follows: allergic reactions, hypersensitivity to the bacteria and viruses from the environment; headaches and fatigue; decreased work-life and early retirement. The measurements in the indoor and outdoor environment of carbon dioxide, chemicals and dust were carried out in and near the industrial premises and office-rooms in Estonia. Health risk levels in the industrial and office environments were determined using the worked out simple risk assessment model (connected with the standard EVS-EN 15251) by the authors. The most emphasized problem is the Estonian woodworkers' exposure to wood dust. The wood dust concentration in the air of nearby residential areas has been determined. On the basis of the Estonian legislation, the measurements and the literature data on wood dust hazardousness, the model for determination of wood dust risk levels is worked out. The risk level of wood dust in the example of Estonian wood-processing industry is III to IV in the five levels scale. On the basis of the investigation it has been concluded that the working conditions in the wood processing industry in Estonia in 2011-2012 have been improved compared with the earlier time period (1999)(2000). The better working conditions have been achieved mainly by installing more effective ventilation systems and consistent cleaning of the work areas.

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Actions to Reduce Air Pollution From a Coal Thermal Power Plant

Cited by 2 publications

References 0 publications

A Mathematical Model for Processes in Coal–Water Slurries Containing Petrochemicals under Heating

A Mathematical Model for Processes in Coal–Water Slurries Containing Petrochemicals under Heating

Environmental and Occupational Impact on Human Health of Dust and Chemicals From Modern Technologies

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