THERMODYNAMIC ANALYSIS OF METHODS FOR PROVIDING AUTOTHERMICITY OF COMBINED FUELS AIR GASIFICATION PROCESSES
For the analysis, a model of combustible mass of combined fuel composed of two components was selected: (a) biofuel, the composition of the combustible mass is averaged based on the analysis of numerous publications on MSW, RDF, SRF of Ukrainian origin and various regions of the world, with Lower Heating Value (LHV) of (22.21Í3.70) MJ/kg; (b) enriched coal from Belorechenskaya mine (Ukraine) with LHV of 35.02 MJ/kg. The effect of co-gasification was traced by calculating the array of indicators of the adiabatic equilibrium state for fuel compositions from П = 0 (coal) to П = 1.0 (biomass) and air flow coefficient values a(min) in the vicinity of stoichiometric by reaction of partial oxidation. To achieve the necessary temperature level of the adiabatic process (1473 K), three variants of technological methods were calculated and compared: an increase in the airflow coefficient, which adversely affects the caloric value of the gas; increase in air temperature, including at the expence of heat recovery of the exhaust gas; adding oxygen to the air, which lowers the concentration of nitrogen, or a combination of the two methods. Optimum values of gasification parameters are determined. Bibl. 14, Fig. 3, Tab. 8.
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