RU1802266C - Burner assembly - Google Patents

Abstract

Usage: when burning solid fuel in the furnaces of boilers equipped with Mills with gravity separator. SUMMARY OF THE INVENTION: the mixture mixture supply duct 1 is connected through a confuser to the slotted embrasure 3. Inside the duct 1, a slotted air inlet pipe 4 with a partition 5 is installed with a gap, made with a cavity connected to the recirculation gas supply pipe 18 and the collector 8 at the outlet end with axial exhaust nozzles 11. The nozzle 4 is equipped with axial exhaust nozzles 13, passed through the manifold 8, the air mixture, moving with two peripheral flows in the duct 1, is injected with secondary air jets at the outlet of the confuser ear and recirculation gases flowing from nozzles 13 and 11. Inert gas recirculation to the torch increases the heat capacity of the torch and reduces the temperature of the flue gases, thereby protecting the heating surface of the furnace from slagging. 3 s.p. f-ly, 2 ill.

Description

rig 1

The invention relates to the combustion of solid fuels and can be used in boiler furnaces equipped with mills with a gravity separator.

The aim of the invention is to increase the reliability of combustion by reducing slagging.

In FIG. 1 shows a burner device, a longitudinal section; FIG. 2 is a section AA in FIG. 1.

The burner device comprises an aerosol mixture supply box 1 connected through a confuser 2 to a slotted embrasure 3, and an air supply pipe 4 installed inside the box 1 with a gap, divided by a hollow partition 5 into upper and lower compartments 6.7. At the output end, the partition 5 is connected to the manifold 8, which is closely adjacent to the output ends 9, 10 of the compartments 6, 7 of the nozzle 4. The collector 8, the cross-section of which has the shape of an isosceles trapezoid, is equipped with axial outlet nozzles 11 mounted on its side wall 12. The nozzle 4 is equipped with axial outlet nozzles 13, mounted on the ends 9, 10 of the compartments 6, 7 and passed through the manifold 8. Nozzles 11 of the manifold 8 and nozzles 13 of the nozzle 4, located on one side of the manifold 8 from the partition 5, are mounted with alternating height. The outlet ends of the nozzles 11 and 13 are located in the cavity of the confuser 2. The compartments 6, 7 of the pipe 4 are connected to the air source through the supply ducts 14, 15, equipped with inlet regulating bodies 16, 17. The cavity of the partition 5 is connected to the pipe 18 for supplying recirculation gases through channel 19.

The burner device operates as follows.

The air mixture flows from the mill into the box 1 from the bottom up, then changes direction to horizontal, moving two peripheral flows to the embrasure 3. At the exit from the confuser 2, the air mixture is injected with jets of secondary air and recirculation gases flowing from nozzles 13 and 11. leaving the embrasure 3, the fuel ignites and burns in a flare. Innings

Inert gas recirculation from an external source, organized in the present burner device, increases the heat capacity of the flare and reduces the temperature of the flue gases in the furnace, thereby protecting the heating surface from slagging. A lower pyrometric temperature level during combustion also contributes to a decrease in flue gas concentration.

gases of nitrogen oxides.

Compared with the burner prototype, the proposed burner device provides higher reliability and quality of the combustion process for

by reducing or completely preventing slagging of the furnace, as well as reducing emissions of toxic nitrogen oxides into the atmosphere.

Claims (4)

1. A burner device containing a box of mixed air mixtures, connected through a confuser to a slotted embrasure, an air supply pipe with a partition installed in the box with a gap, which, in order to increase the reliability of combustion by reducing slagging, the partition is made with a cavity, connected to the recirculation gas supply pipe and to the collector at the output end, which is adjacent to the output end of the air supply pipe, and the air supply pipe is equipped with axial nozzles missing through of the collector, and the output ends of the nozzles air supply pipe and manifold are located in the cavity of the confuser. 2. The device according to p. 1, as follows, so that the cross section of the collector is made in the form of an isosceles trapezoid, 3. The device according to p. 1, moreover, the fact that the exhaust nozzles of the air supply pipe and the manifold located on one side of the collector from the partition are installed alternately in height. 4. The device according to p. 1, with the exception that the exhaust nozzles of the collector are installed coaxially with the exhaust nozzles of the air supply pipe.