Abstract: A solid fuel burner apparatus is provided having a combustion chamber surrounded by a housing and having a solid fuel and primary air nozzle attached to the combustion chamber and located in the housing for directing pulverized solid fuel and air into the combustion chamber. A solid fuel and primary air input is connected through the housing to the solid fuel and primary air nozzle for directing solid fuel thereinto. A secondary air input is connected to the housing for directing air under pressure into the housing and from the housing into the combustion chamber. The housing is divided between first and second compartments and a proportioning damper system divides the input secondary air between the first and second compartments of the housing. Dampers are used to proportion secondary air between first and second compartments from an inlet plenum and diffusion vanes direct the primary and solid fuel into the combustion chamber with a predetermined pattern to control the flame.

Abstract: A combustion apparatus which has a burner having an inner wall lined with a refractory material forming a combustion chamber and an outer wall spaced from the inner wall by spacing members. A primary air supply supplies air to the burner combustion chamber through the outer and inner walls. A pulverizer for pulverizing solid fuel is connected to the primary air supply for feeding the pulverized solid fuel to the burner combustion chamber. A secondary air supply supplies air to the burner between the inner and outer walls and into the burner combustion chamber. The secondary air supply supplies air to an area of negative pressure in the combustion chamber created by the swirling flow of air from the primary and secondary air supply. An ignition pilot is mounted through the burner inner and outer walls adjacent to the primary air and fuel feed. The ignition pilot has a pilot flame detector which looks at the pilot and the main combustion flame.