STUDY OF THE KINETICS OF BIOMASS PYROLYSIS IN A FIXED BED. 4. DESIGN FEATURES AND NUMERICAL ANALYSIS OF THE TWO-STAGE BAGASSE THERMOCHEMICAL PROCESSING IN A PLANT WITH A PRODUCTIVITY OF 1250 KG/H

Using the developed models describing the processes of biomass pyrolysis (Bagasse) and gasification of its coke-ash residue, detailed information was obtained on the design characteristics of the reactor, the yield and composition of pyrolysis gases, aerodynamics, heat and mass transfer and the chemical reaction of the gas-dispersed medium. These results were used in the development of two original designs of plants for thermochemical processing of biomass with a Bagasse capacity of 1250 kg/h and 232.3 kg/h (dry weight). In the plant with a high capacity of 1250 kg/h, one pyrolyzer has two gasifiers for the conversion of Bagasse coke-ash particles: an internal gasifier with a capacity of 68 kg/h and an external one with a capacity of 271 kg/h. With a low productivity of 232.3 kg/h, only an external gasifier is installed per pyrolyzer. Unlike existing plants for thermochemical processing of biomass, here at the exit from the reactor two synthetic gases of different composition and calorific value are obtained: low-calorie generator gas, % (vol.): CO2 — 3.38; CO — 32.56; H2 — 17.2; H2О — 4.29; N2 — 42.57 — with a calorific value of 5971 kJ/Nm3; and medium-calorie pyrolysis gas, % (vol.): CO2 — 11.2; CO — 38.56; H2 — 26.9; C1.16H4 — 22.76 (70 % CH4 + 30 % C2H4); C6H6.2O0.2 — 0.31; N2 — 0. CO2 — 11,2; CO — 38,56; H2 — 26,9; C1,16H4 — 22,76 (70 % CH4 + 30 % C2H4); C6H6,2O0,2 — 0,31; N2 — 0,32 — with a calorific value of 17904 kJ/ Nm3. Bibl. 20, Fig. 9, Tab. 1.