Combustion optimization system and procedure in pulverized solid fuel boilers, and boiler incorporating said system

摘要

The system comprises a boiler (1), groups of main burners (2F, 2E, 2D, 2C) located at different levels or areas through which solid fuel sprayed into the boiler (1) and some main mills ( 3F, 3E, 3D, 3C) of solid fuel, in which each of them is connected to each of the main burner groups (2F, 2E, 2D, 2C) to which they direct a solid fuel flow. In addition, it incorporates a replacement mill (3B) intended to operate only on that group of main burners (2F, 2E, 2D, 2C) whose associated main mill (3F, 3E, 3D, 3C) suffers a stop, as well as a mill permanent operating support (3A) that directs an additional solid fuel flow to the selected main burner group (2F, 2E, 2D, 2C), supplementing the solid fuel flow rate provided by the main mills (3F, 3E, 3D, 3C).