MULTI-COAL-TYPE ADAPTIVE COMBUSTION SYSTEM AND METHOD SUITABLE FOR W FLAME BOILER

摘要

Disclosed are a multi-coal-type adaptive combustion system and method suitable for a W flame boiler. The system comprises a downward-injection secondary air nozzle (3), downward-inclination secondary air nozzles (4) and burn-out air nozzles (5) which are respectively in communication with a secondary air bellows of a W flame boiler (1); the downward-injection secondary air nozzle (3) is vertically arranged on an arch of the W flame boiler (1) and is positioned behind a side of a main pulverized coal nozzle (7) of a burner (6); the downward-inclination secondary air nozzles (4) are obliquely arranged at the lower part of front and rear walls of a lower furnace of the W flame boiler (1); and the burn-out air nozzles (5) are horizontally arranged at the upper part of throats of front and rear walls of an upper furnace of the W flame boiler (1), and can swing up and down.