2013 2(13)

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Pages:

27 - 33

Language:

RU

Ref.:

5


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SCIENTIFIC AND TECHNICAL BASIS OF ENERGY-SAVING THERMAL VACUUM METHOD FOR PRODUCING FUEL BRIQUETTES FROM WASTE OF WOOD PROCESSING INDUSTRY

Kutovoy V.A., Lutsenko A.S.

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


Citation:

Kutovoy, V.A. and Lutsenko, A.S., (2013) Scientific and technical basis of energy-saving thermal vacuum method for producing fuel briquettes from waste of wood processing industry, Modern Science: Researches, Ideas, Results, Technologies, Iss. #2(13), PP. 27 - 33.


Keywords:

thermal vacuum technology; energy saving; sawdust; fuel; quality


Abstracts:

Undertake technical scientific development of energy-saving technology of thermal vacuum drying of wet sawdust and getting out of them the solid fuel. The drying time is measured in seconds due to the maximum surface evaporation, rapid heating, low pressure of the environment. The drying process is continuous. Heating temperature the dried material is maintained with precision ± 1 degree. This prevents overheating of sawdust during drying. Power consumption not more than 0.15 kW per kg of produced product. In this installation, sawdust humidity of 50% passes through the heating element heated to the temperature 120°C degrees with the speed of 9.8 m /s. The temperature of the dried sawdust is not more than 40°C degrees. Final moisture of dried sawdust 12%. Minimal pressure within the vacuum chamber 20.0 kPa. The drying time is not longer than 15 seconds. New approach is considered to the drying of waste wood industry using thermal vacuum dryer. Based on the analysis of the scientific and physical research it can be concluded that the intensification of the process of drying wet areas in thermal vacuum dryer can be achieved in the following ways: a)increasing the vapor pressure differential at the surface of the evaporation material to be dried and the partial vapor pressure in the environment, b) decreasing the size of dries particles; c) increasing area of the evaporation the wet material, d) increasing the rate of heating the material being dried to the target temperature. Choosing pressure and temperature makes it possible to optimize the drying process by regulating effect on the physicochemical properties of the material being dried. Obtained data make it possible to create energy-efficient, high-performance, thermal vacuum installation for various purposes for even drying heterogeneous environments. Simultaneous heating and reduced pressure in the environment accelerates the process of removal of moisture from the drying material, lowers the temperature of its heating and improves the quality of the resulting products.


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