METHOD OF GASIFICATION OF SOLID FUEL AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC C10J3/02 C10J3/14 C10J3/20 C10B49/04 F23G5/27 

FIELD: technological processes.

SUBSTANCE: invention relates to chemical technology and heat power engineering based on the processing of local low-grade carbon-containing raw materials, including bituminous (wood, peat, brown coals, various wastes), by gasification to produce a combustible gas containing carbon monoxide and hydrogen, for subsequent use as a power gas in transport and power plants. Method involves processing solid particulate fuel in a gasifier as part of two co-operating inclined rotating cylindrical reactors, in each of which a process of gasification is carried out in a dense layer with a successive alternation of phases (regimes) – the phase of the reversed process and the phase of the direct process, the reactors working in phase. Reactors operate in a two-cycle operating cycle with a synchronous phase change. Phase change in the reactors is effected by rotating them in a vertical plane to ensure reversible movement of the fuel. Each reactor is equipped with a steam-water jacket with a perforated inner wall of the working chamber for injecting superheated steam into the activation zone, as well as an expansion piston to maintain the fuel layer and regulate the volume of the buffer zone with a hollow stem for gas extraction. Cooling of the fuel gas is carried out by means of heat exchangers for water evaporative and air cooling of the gas. Obtained activated carbon is accumulated in the buffer zone, and the vapor-gas mixture is transported to the anti-phase reactor, where the gasification of the activated carbon layer reversibly moving from its buffer zone is completed in a direct process with counter filtration of the produced gas, which is withdrawn from the reactor and after the cooling is supplied to the consumer.

EFFECT: technical result consists in increasing the completeness of fuel processing, the quality and calorific value of the resulting fuel gas, reducing heat losses, as well as increasing the compactness, economy, reliability and durability of the gasifier.

10 cl, 9 dwg