METHOD OF PRODUCING GENERATOR GAS FROM SOLID MUNICIPAL AND ORGANIC WASTES AND A COMBINED GAS GENERATOR OF AN INVERTED GASIFICATION PROCESS FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC F23B90/00 F23G5/27 

FIELD: technological processes.

SUBSTANCE: group of inventions relates to combustion and gasification and is intended to produce power generator gas for production of electric and heat energy. Method consists in separation of process into torrefication zone and gasification zone with separate supply of gas-air agents in these zones. In the first zone located in the upper part of the reactor, there is a torrefication process of briquetted solid municipal and organic wastes, where controlled supply of recirculating hot exhaust gases of ICE is carried out, heating is performed without access or with access of minimum amount of oxidant – air, which flows at temperatures of 350–400 °C In the second zone, the zone of gasification of "toasted" torrefied briquettes of solid municipal and organic wastes, located in the lower part of the reactor in the area from the layers adjacent to the blowing air nozzles to the section cross-section – "necks", combustion and gasification of fuel is carried out, at that process of gases supply to gasification zone is controlled, three flows – torrefied briquettes and steam-gas torreification products from upper part of reactor and air in amount determined by preset gasification mode are supplied to confuser part of gasification zone reactor. In lower part of gas generator, located behind cut of diffuser part of reactor, after turning the generator gas flow into the volume of the gas stream, injecting an aqueous solution of carbamide (urea – H₂N-CO-NH₂) through a row of nozzles installed along the perimeter of inlet part of annular channel of gas volume. Gas generator is made in the form of reactor of torrefication and gasification of fuel, upper part of which is vertical cylindrical channel (torrefication zone), into the end of which through the system of separate supply in free from fuel space part of hot exhaust gases of ICE is supplied, flow rate of which is controlled by temperature of torrefication. Lower part of gas generator (gasification zone) is made in form of two truncated cones of confuser and diffuser installed in series from top to bottom, facing vertices towards each other with narrowing of section forming "neck". In the confusor in the cross-section at the design distance from the neck there are nozzles of the input of gasifying blow air along the perimeter of the nozzle. Common geometry of gasification zone and shape of briquettes allows uniform distribution of blow air at diameter of "neck" up to 700 mm. Optimum geometric dimensions of confuser and diffuser, place and shape of inputs of gasifying blow air are in design dependence on diameter of "neck" in narrow section.

EFFECT: inventions allow increasing fuel power of gas generator to 5,000–7,000 kW, increasing thermal efficiency and producing gas with minimum amount of resins, soot and hydrocarbons without increasing overall dimensions of plant.

2 cl, 1 dwg