Solid fuel burner, boiler device, nozzle unit of solid fuel burner, and guide vane unit

摘要

Problem to be solved: to provide a solid fuel burner capable of reducing unburned fuel and co while suppressing NOx generation.A solid fuel burner (5) inserted into a burner throat (28) disposed in the wall portion (19) of the furnace (2);A solid fuel nozzle (10) for injecting a mixed fluid of solid fuel and primary airSecondary air nozzle (11) for ejecting secondary airA third-order air nozzle (12) ejecting tertiary air andLocated on the outer periphery of the tip of the solid fuel nozzleA secondary air guide member (34) for guiding the secondary air flow to the outside of the radial directionAt the tip of the tertiary air nozzleThe first angle of the tertiary air flow to the center axis (c) of the solid fuel burner θ One or more tertiary air guide members (20) to guide radially outward to the outsideIn a solid fuel burner comprisingThe tip position (x2) of the tertiary air guide member in the axial direction of the solid fuel burner isThe front end position (x1) of the secondary air guide member is the furnace side.