METHOD FOR COMBINED PRODUCTION OF ELECTRIC ENERGY AND GAS FUEL AT THERMAL CONVERSION OF BIOMASS Russian patent published in 2020 - IPC C10B49/02 C10B57/18 C10J3/06 C10J3/14 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and power engineering, specifically to methods of thermal conversion of biomass for production of gaseous fuel containing hydrogen and carbon monoxide, by combustion of which generation of electric power is provided. Biomass is dosed fed through a gas-tight feeder into the upper part of the heat-insulated retort, above the biomass layer, the combustion products are fed from the gas engine with the specified oxygen content, in the upper part of the retort, due to the heat of the introduced combustion products, the moisture is evaporated and the biomass is heated to the temperature of the beginning of its exothermic heating (which depends on type of biomass), in middle part of retort there is pyrolytic decomposition of biomass, in lower part of reactor at temperature of 950–1200 °C involves thermal conversion of a vapour-gas mixture of volatile products of pyrolytic decomposition of biomass and combustion products in a layer of solid-phase products of pyrolytic decomposition of biomass, wherein liquid phase free from liquid phase containing hydrogen and carbon monoxide is obtained in accordance with reactions C_nH_m = nC + (m/2)H₂, C + H₂O = CO + H₂, C + CO₂ = 2CO and withdraw from the lower part of the retort outside, then it is either directed to the external consumer, or mixed at a predetermined ratio with atmosphere air and directed for combustion into gas engine mechanically connected to electric generator, and the reacted residue of solid-phase products of pyrolytic decomposition of biomass is discharged outside through a gas-tight gate in the lowest part of the retort.

EFFECT: technical result of the invention is joint production of electric power and gas fuel by switching to direct heating of biomass with gaseous heat carrier, which enables to increase efficiency of process of producing gas fuel and scale of electric power generation, avoiding use of electric energy for heating of biomass and necessity to use expensive and complex in processing heat-resistant and heat-resistant materials.

9 cl, 1 dwg