The present invention relates to a cylindrical non-melt and partial melt type entrained flow bed gasifier with one or more burners mounted on the top thereof for supplying pulverized raw coal and oxidizer thereto, wherein each of the burners comprises three or four pipes so as to form a central supplying line for injecting the pulverized coal with a carrier gas into the gasifier, a primary oxidizer annular region around the central supplying line having a plurality of primary oxidizer supplying bores for injecting primary oxidizer vertically or at an angle to the injection region of the pulverized coal supplied through the central supplying line so as to direct the pulverized coal to the central region, and an outer cooling annular region around the primary oxidizer annular region for flowing cooling water, which is operated preferably at a temperature range of 1,2501,450 C., or of 1,1501,500 C. according to the properties of the coal. According to the present invention, the pulverized coal and oxidizer are properly mixed, and the pulverized coal is directed towards the middle of the gasifier, so that the reaction is completed with the ash being wholly non-melted or partially melted.

Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.

A combustion system with a combustion area in a boiler including a fuel pipe for delivering fuel is disclosed. A duct having a bend extended there through is in fluid communication with the fuel pipe and the combustion area of the boiler. The duct has an outer perimeter and an inner perimeter. The duct includes a first partition plate to form a first parallel flow of the fuel between the outer perimeter and the first partition plate, upstream of the bend.

A distribution ring for fuel in a burner (7) includes a hollow body (21) which is configured to be annular with respect to a longitudinal axis (22), a feed spigot (23) which is connected to the hollow body (21) and is intended for feeding the fuel into the hollow body (21), and a plurality of discharge spigots (25) for discharging the fuel from the hollow body (21) to the burner (7). The discharge spigots (25) are each arranged externally at the hollow body (21) in the radial direction of the longitudinal axis (22).