METHOD AND DEVICE FOR BIOMASS PYROLYSIS AND GASIFICATION USING TWO INTERCOMMUNICATED KILNS Russian patent published in 2014 - IPC C10J3/66 

FIELD: metallurgy.

SUBSTANCE: solid high heat capacity particles are used as heat carrier while saturated water steam is used as an oxidiser. First, biomass is subjected to low-temperature pyrolysis at 500-800°C to produce unpurified synthetic gas not containing alkaline metal oxides and coke. Then said unpurified synthetic gas and coke are subjected to high-temperature gasification at 1200-1600°C to produce synthetic gas not containing resin. Produced synthetic gas is cooled, de-dusted, deoxidised and dewatered. Proposed device comprises gasification kiln and pyrolysis kiln arranged one on the other. Note here that their chambers are communicated. Besides it comprises heater of particles, heater with plasma flame, draught fan, first heat exchanger, water tank for production of saturated water steam, water feed pump, second heat exchanger, dust catcher, deoxidiser tower and dewatering device.

EFFECT: synthetic gas of high efficiency and calorific value with no resin of alkaline metal oxides.

12 cl, 1 tbl, 1 dwg