METHOD OF GASIFICATION OF SOLID FUEL AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC C10J3/00 

FIELD: technological processes.

SUBSTANCE: invention can be used in the chemical and energy industries. Processing of the solid crushed fuel is carried out by gasification in a dense layer moving along the axis of a rotating inclined cylindrical reactor with a steam-water jacket. At the first stage in the upper part of the reactor, an inverted gasification process is conducted with air blasting into the upper reaction zone, where the fuel is partially oxidized and partially gasified, and the main part of it moves to the activation zone, where at a temperature above 800 °C is treated with superheated steam, which is injected from the steam-water jacket through a perforated wall. Produced activated carbon is accumulated in the buffer gas sampling zone of the reactor, and the resulting vapor-gas mixture is transported to the reaction zone of the second stage of gasification, where a direct process of gasification of the moving bed of activated carbon is implemented with counter filtration of the produced fuel gas through it, which is withdrawn from the reactor and cooled in a water evaporative heat exchanger-steam generator, where the resulting water vapor enters the steam-water jacket, and the cooled fuel gas to the consumer. Gasification reactor is additionally equipped with a device for supplying air to the upper reaction zone, as well as a vapor-gas outlet channel to the lower reaction zone of the direct gasification process. For removal of combustible fuel gas filtered through the activated carbon layer, a gas sampling channel with a water evaporative heat exchanger-steam generator is provided in the delivered and built-in design and, possibly, with a gas-air cooler of gas, as well as with a gas analyzer-converter to control the chemical composition and temperature of the produced gas.

EFFECT: proposed invention makes it possible to increase the completeness of fuel processing, the quality and calorific value of fuel gas, to reduce heat losses, and to increase the compactness, economy, reliability and durability of the reactor.

9 cl, 10 dwg