COAL-WATER FUEL COMBUSTION DEVICE (VERSIONS) Russian patent published in 2014 - IPC F23C3/00 F23J1/02 

FIELD: heating.

SUBSTANCE: furnace unit for burning coal-water fuel comprises a lined cylindrical combustion chamber with horizontal rotation axis and flat end face walls, and a cooling chamber screened by steam-generating tubes and fitted by a convection tube bundle inside it; inside the combustion chamber, fuel nozzles are mounted and are communicating with each other by gas bypass ports and serving for both separate and common supply of fuel of different types and primary oxidiser, an ash catcher made as a funnel is set in the lower part of the furnace unit, blast nozzles are set inside the combustion chamber along with tangent supply of the oxidiser and a central fireproof insertion is installed. Additionally below the ash catcher there is an ash-and-slag removal chamber with its dimension in the cross section exceeding the funnel mouth diameter, with an open bottom end face set in a tank with water, with one inclined wall, a scraper conveyor to remove ash and slag is mounted above the bottom and the inclined wall of the tank, the walls of the ash-and-slag removal chamber can be heated. The combustion chamber is installed inside the cooling chamber, the combustion chamber and the cooling chamber communicating by gas bypass ports are fitted by a common lower wall where the ash catcher is set. The ash catcher is installed in the centre of the combustion chamber, the gas bypass ports are placed near its symmetry axes. The lined combustion chamber is placed outside the cooling chamber, at the bottom the combustion chamber is connected to the cooling chamber by gas bypass ports through a gas bypass channel. The ash-and-slag removal chamber is of cylindrical shape and its diameter exceeds the diameter of the ash catcher's funnel mouth by two and more times. For the purpose of heating the ash-and-slag removal chamber, it is connected to the combustion chamber by a pipeline with a built-in ventilator and a heat exchanger is additionally installed before the ventilator.

EFFECT: increase of temperature in furnaces with vertical or horizontal rotation axes up to the ash melting temperature and provision for liquid slag removal, improved efficiency of coal-water fuel combustion and improved reliability of the furnace performance.

15 cl, 6 dwg