Power Boiler having Vertically Mounted Cylindrical Combustion Chamber

摘要

A ground supported power boiler is described combining a refractory lined and insulated conical floor; an insulated cylindrical combustion chamber; a cylindrical furnace with water tube wall; a rectangular convective section; a single vertical steam drum; tangential injection of the fuel and combustion air; means for fluidizing the fuel bed; means for selectively stripping particulates from the flue gases; multi-stage particulate stripping and filtering from flue gases, means for using the walls of steam drum as steam/water droplet separator, means for recirculating and capturing heat from the flue gases; means for pressurizing the interior of the boiler above atmospheric pressure; means for heating and drying fuel prior to feeding the fuel to the boiler; means for creating hydrogen shift reaction; means for eliminating any need for sootblowing; and designed to not require the use of an induced draft fan.

主权项

1. A boiler with a cylindrical furnace section having a vertical axis in which the combusting fuel and gases are rotated to centrifugally move entrained particulates and denser gases to the perimeter of the combustion chamber and incorporating at least one extraction duct for removing at least a portion of said particulates, said extraction duct intersecting said combustion chamber tangentially and at a location in the upper half of said combustion chamber, with less than 100% of the total gas moving through said cylindrical furnace section exiting out the top of said cylindrical furnace section and the balance of said gas flow exiting through at least one of said extraction ducts.