Bilets D. Gasification of polydisperse systems of coal origin

The dissertation for obtaining the scientific degree of the candidate of technical sciences ( doctor of philosophy ) in specialty 05.17.07 « C hemica l technology o f fuel and fuel and lubricants» (161 Chemical technology and engineering National Technical University « Kharkiv Polytechnic Institute » , specialized academic council D 08.084.05 at the National Metallurgical Academy of Ukraine, Dnipro , 20 2 0 For the first time, the influence of the composition of polydisperse systems on their behavior in preparation for gasification was studied: pouring time, natural slope angle and bulk density when discharged from the hopper, as well as sticking during m ixing. Mathematical and graphical dependences of air flow influence from 0.0005 to 0.004 m 3 min and temperature 400 to 500 ° С on the values of rate constants and activation energy, solid residue yield, condensed and gaseous products during gasifi cation o f polydisperse systems we re developed. A basic technological scheme of gasification of polydisperse systems of coal origin were developed, which can be recommended for implementation. The main elements of the technological scheme are a mass mixer, furnace and electric al converter. It is established that from the point of view of electricity consumption, the o ptimal size of the carbon packing for the electroconverter is 10 13 mm and it is determined that the consumption of the carbon packing (coke) in the ga sification process is 0.014 % of the total weight of a portion, or 0.575 % of the converted mass. It is established that when using the proposed method of gasification of polydisperse systems of coal origin, it is possible to obtain a gas whose combustion heat is 1.62 2.47 times higher than the heat of combustion of gas obtained from gasification by the Lurgi method. The main theoretical provisions and experimental data of the dissertation are used in the educational process at the departments of « Chemical T echnology of Oil and G as Processing » of the Lviv Polytechnic National University , « Metallur gical Fuel and Refractory » of the National Metallurgical Academy of Ukraine and « O il Processing, Gas and Solid F uel s Technology » of National Technical University « K harkiv Polytechnic Institute » Key words: polydisperse system, heavy coal tars, lignite, walnut shell, gasification, electrical conversion, producer gas