Loading...
Please wait, while we are loading the content...
Similar Documents
Recovery of unburned carbon by conventional flotation of bottom ashes from Tuncbilek Thermal Power Plant
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yamık, Ahmet Dogruoz, A. S. |
| Copyright Year | 2008 |
| Abstract | As is well known, energy sources fall into two categories: ‘renewable’ ones, such as water, wind, sun, tide, and geothermal, and unrenewable ones, such as petroleum, natural gas, uranium, and coal. The most evident characteristic of unrenewable energy sources (mainly coal) is that they can be used only once and cannot be replaced. Individuals and institutions, which have practised this oneway consumption, consequently have important responsibilities both towards the society to which they belong and to the generations that follow after. The coal known as hard lignite, whose moisture content is less than 25%, keeps its grain hardness in open air, can be washed using wet methods and has a high calorific value; it is, however, in short supply, which makes it essential to use this coal in the optimal way. In Turkey, Tuncbilek coal has an important place among its peers as it has the properties mentioned above. Total proven lignite reserves in Turkey amount to 8.4 billion tons, 90% of which have lower calorific value. Coal has an important share in power production and heating in Turkey. Almost half of the power is produced using coal. The thermal power plants (TPP) and lignite-using power plants are in the majority. Approximately 38% of the electricity across the world is produced from coal (Helle et al., 2003). Low quality lignites, which are in abundant supply in Turkey, are used in thermal power plants. Coal is burned after it is pulverized. During the combustion process, as a result of incomplete combustion, unburned carbon passing through the grizzly of the power plants is called bottom ash, while that which goes into the atmosphere through the plant’s chimney is called fly ash (Vassilev et al., 1997). Moreover, some of the lignites burned in thermal power plants cannot be burned totally and go into ash, so the lignites obtained at high cost are wasted (Helle et al., 2003,, Vassilev et al., 1997). Research must therefore be done carefully before the building of thermal power plants to ensure they burn lignites with a high recovery. The better the lignites burn, the higher the energy produced. Apart from energy production, too much waste ash is also released by thermal power plants. Whether a significant amount of ash is discharged from the power plants depends on the energy production rate (Rayalu et al., 2001). This waste is used as filling material (Acosta et al., 2001). The environmental benefits and economic feasibility of coal recovery were made clear from the results of a Recovery of unburned carbon by conventional flotation of bottom ashes from Tuncbilek Thermal Power Plant |
| Starting Page | 171 |
| Ending Page | 177 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| Volume Number | 108 |
| Alternate Webpage(s) | http://www.scielo.org.za/pdf/jsaimm/v108n3/06.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
