2013 0(TTPT)

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Kutovoy V.A., Kazarinov Yu.G., Lutsenko A.S., Nikolaenko A.A.

National Science Center Kharkov Institute of Physics and Technology, Kharkov, Ukraine


Kutovoy, V.A., Kazarinov, Yu.G., Lutsenko, A.S. and Nikolaenko, A.A., (2013) Current trends processing of brown coal, Modern Science: Researches, Ideas, Results, Technologies, Iss. #0(TTPT), PP. 25 - 31.


thermal vacuum plant; lignite; nanosized powder; quality and ecology


The aim of this work is the development of energy-saving thermal vacuum drying techniques, grinding brown coal and increasing its fuel characteristics. We are forced to move to solid fuels: shale, brown coals, as the oil and gas reserves are declining. The main application of brown coal is its use as a fuel in thermal power plants (TPP), small boilers and industrial plants. To prepare the coal for combustion, additional costs needed its associated with drying and grinding. Equipment for drying and grinding of coal takes a large area, and also it has a high energy consumption and metal. This is a costly process, both in terms of energy consumption and the required time of production. Furthermore, solid fuel, especially lignite, contains sulfur and nitrogen. Therefore, oxides and dioxides of sulfur and nitrogen formed during combustion, which also entails an additional burden on the environment. The development of thermal power in the modern environment requires high-quality fuel with low sulfur and nitrogen. natural coals have high moisture and ash content, unlike liquid and gaseous fuels. The analysis of scientific, technical and patent literature has shown that there is the need to upgrade the fuel preparation processes in order to increase the efficiency of thermal power plants, reduce energy consumption of metal equipment, decreasing the sulfur and nitrogen in the brown coal, which reduces the amount of harmful emissions into the atmosphere by burning it. The technology has been created, which gives the following advantages - energy-saving, eco-friendly continuous thermal vacuum drying of lignite, reduced sulfur and nitrogen in the dried brown coal, which reduces the amount of harmful emissions into the atmosphere by burning it. Drying lignite in thermal vacuum installation occurs uniformly, minimum dimensions of the crystals were 10 nm, moisture content in the final product was about 0.5%. Spectra of sulfur and nitrogen were studied in dry lignite by X-ray photoelectron spectroscopy. The results of the study revealed that the thermovacuum drying method reduces the sulfur content in lignite 4.6 times, and nitrogen - 8.5 times. The use of thermal vacuum technology allows you to create energy-efficient, high-performance technique of continuous coal drying and grinding simultaneously, thus reducing the cost of removal of moisture and improve the ecological environment. It is shown that the method of drying thermovacuum improves the quality of lignite, reduces the amount of impurities therein and also grinds it.


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