| 摘要 |
FIELD: heating.SUBSTANCE: invention relates to heat engineering and namely to combined pulverised-coal burners and can be used in power engineering industry on pulverised-coal boilers with supply to burners of high-concentration pulverised coal (HCPC) via pressure pipes. A combined pulverised-coal (PC) burner includes an air duct, channels for PC-and-air mixture (PCAM) and secondary air, a HCPC supply pipe and a HCPC dispersion device. Secondary air and PCAM channels are arranged in a projection onto a vertical plane above each other with a gap between them, and in PCAM channel there is the HCPC supply pipe, after the end face of which there installed is the HCPC dispersion device consisting of a horizontal splitter of an angular type and a vertical splitter arranged after it, the side walls of which divide PCAM channel into two outlet sections of a vertical slit type; besides, external vertical walls of PCAM channel are convergent throughout the burner length till the vertex of the vertical splitter, and after it - convergent in a horizontal plate so that height increases. The secondary air channel is equipped with an atomiser pipe for installation of an oil atomiser and gaseous fuel supply tubes.EFFECT: reduction of hazardous NOemissions and fuel incomplete combustion.2 cl, 2 dwg |
