SOLID FUEL GASIFICATION UNIT Russian patent published in 2014 - IPC C10J3/20 

FIELD: power industry.

SUBSTANCE: solid fuel gasification unit includes a gasifier housing consisting of two parts, an upper one made in the form of a cylindrical shell and a lower one made in the form of a hollow flattened cone with a casing. Space between an inner surface of the casing and an outer surface of the housing is filled with flowing cooling water. Holes for inlet and outlet water supply nozzles are made in the casing from above and from below. On the gasifier cover plate there installed in the centre of the first through hole is a solid fuel loading device in the form of a vertical connection pipe. An oxidiser supply device is made in the form of an in-series connected forced-draft fan, an air ozonation unit consisting of a shell with flanges and with a through hole for entry of electrodes in the form of two flat metal plates. The shell of the ozonation unit is in-series connected to a common air duct and parallel to four air pipeline branches. Holes for the inlet and outlet water supply nozzles are made in the casing from above and from below. A solid fuel ignition device is installed in the second through hole of the gasifier shell and the casing. A solid fuel combustion zone formation device is made of an in-series connected combustible gas bottle with shutoff and control valves and a pressure gauge, a gas line and a burner. The burner is equipped with a compressed air supply nozzle. A feeder with a bladed rotor on bearing supports is installed at the lower part of the gasifier housing by means of a flange connection and connected through couplings to an electric motor. On the outer surface of the feeder housing there installed is a casing with two through holes with the cooling water supply nozzles into the inner space between the feeder housing and the casing. Outlets of the bladed rotor shaft are equipped with gland seals via through holes. The lower feeder part is connected by means of a flange connection to a gas outlet and a slag unloading chamber. The latter is made of three parts, upper and lower ones, in the form of flattened cones and a middle one in the form of a hollow cylinder. The unloading hole of the chamber is connected by means of the flange connection to the slag unloading device in the form of a screw batcher with an electric motor, a cable and a frequency converter. Temperature sensors are installed under the gasifier cover plate, under the air atomisers and steam atomisers under the feeder in a gas duct at the outlet of the hollow flattened cone and the connection pipe of the heat exchanger, in the unloading hole of the slag unloading device. Minimum and maximum fuel level monitoring sensors are installed on the gasifier cover plate.

EFFECT: improving the productivity and efficiency of solid fuel gasification in the unit; increasing the life cycle of the unit by ten-tweny times; reducing the gas dust content; providing control of the unit operation.

15 dwg