Power boiler having vertically mounted cylindrical combustion chamber
First Claim
1. A boiler with a cylindrical furnace section having a vertical axis in which combusting fuel and gases are rotated to centrifugally move entrained particulates and denser gases to a perimeter of a 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 an 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, in which at least some of said gas exiting out the top of said cylindrical furnace is used to heat and/or at least partially dry at least some of the incoming fuel.
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Accused Products
Abstract
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.
15 Citations
27 Claims
- 1. A boiler with a cylindrical furnace section having a vertical axis in which combusting fuel and gases are rotated to centrifugally move entrained particulates and denser gases to a perimeter of a 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 an 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, in which at least some of said gas exiting out the top of said cylindrical furnace is used to heat and/or at least partially dry at least some of the incoming fuel.
- 22. A boiler with a cylindrical furnace section having a vertical axis in which the combustion fuel and gases rotated to centrifugally move entrained particulates and denser gases to a perimeter of a 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 an 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, incorporating a single steam drum with its axis oriented vertically, in which feeding and relieving pipes connected to said steam drum are arranged such that steam and water flows to and from said steam drum induce a rotation of the steam and water therein around the vertical axis of said steam drum.
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25. A boiler with a cylindrical furnace section having a vertical axis in which the combustion fuel and gases rotated to centrifugally move entrained particulates and denser gases to a perimeter of a 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 an 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;
- in which at least one bundle of heat transfer tubes are located above said cylindrical furnace section in which said gases exiting through the top of said cylindrical furnace flow vertically across said bundle of heat transfer tubes, said bundle of heat transfer tubes comprising a screen section, a superheater section, a generating bank section, or a economizer section, or any combination thereof, in which said exiting gas flows through a fuel dryer, one or more cyclone separator, a bag house filter, an electronic precipitator, or any individual component or combination thereof, and then to a stack, in which said gas flow through all components in a gas flow stream is created by an elevated internal gas pressure in said cylindrical furnace, and;
in which said elevated internal gas pressure inside said cylindrical furnace is created by one forced draft fan. - View Dependent Claims (26, 27)
- in which at least one bundle of heat transfer tubes are located above said cylindrical furnace section in which said gases exiting through the top of said cylindrical furnace flow vertically across said bundle of heat transfer tubes, said bundle of heat transfer tubes comprising a screen section, a superheater section, a generating bank section, or a economizer section, or any combination thereof, in which said exiting gas flows through a fuel dryer, one or more cyclone separator, a bag house filter, an electronic precipitator, or any individual component or combination thereof, and then to a stack, in which said gas flow through all components in a gas flow stream is created by an elevated internal gas pressure in said cylindrical furnace, and;
Specification