Method and apparatus for improved firing of biomass and other solid fuels for steam production and gasification

摘要

A ground supported single drum power boiler is described combining a refractory lined and insulated V-Cell floor; refractory lined and insulated combustion chamber; integrated fuel chutes configured to pre-dry wet solid fuel; top mounted fuel bin; internal chamber walls; configurable combustion air systems; and a back pass with after-burner ports and cross flow superheaters. The boiler can be configured in pre-assembled modules to minimize the field construction time and cost. An alternative embodiment is adaptable as a gasifier.

主权项

1. A floor of a solid fuel fired boiler comprising one or more troughs in which most of the fuel firing said boiler falls into said trough or troughs and burns therein, each of said trough or troughs including an outer supportine structure, an inner refractory layer, and an insulating layer between said outer supporting structure and said inner refractory lining, and wherein the bottoms of each of said trough or troughs are truncated resulting in approximately horizontal openings in the bottoms of each of said trough or troughs, and in which a chute means extends downwards from each of said openings and a perforated movable grate floor resides below each of said openings such that each of said movable grate floors may be opened periodically to discharge the contents of each of said trough or troughs.