A biomass or bio-fuel combustion system is provided utilizing oxygen as the source of combustion. The system generally includes a primary combustion chamber defining an internal space for receipt of the biomass and a directional oxygen injector positioned within the combustion chamber and having a plurality of injection nozzles for injecting oxygen into the internal space, preferably at an angle relative to a longitudinal axis of the combustion chamber. A transfer chamber extends from the primary combustion chamber to a secondary combustion chamber for further combustion of any remaining particulates. A cooling and exhaust system extends from the secondary combustion chamber for drawing off and condensing out any exhaust and moisture contained in the remaining exhaust particulates. A method of burning a biomass of bio-fuel with producing nitrogen dioxide is also disclosed.

A biomass or bio-fuel combustion system is provided utilizing oxygen as the source of combustion. The system generally includes a primary combustion chamber defining an internal space for receipt of the biomass and a directional oxygen injector positioned within the combustion chamber and having a plurality of injection nozzles for injecting oxygen into the internal space, preferably at an angle relative to a longitudinal axis of the combustion chamber. A transfer chamber extends from the primary combustion chamber to a secondary combustion chamber for further combustion of any remaining particulates. A cooling and exhaust system extends from the secondary combustion chamber for drawing off and condensing out any exhaust and moisture contained in the remaining exhaust particulates. A method of burning a biomass of bio-fuel with producing nitrogen dioxide is also disclosed.

A combustion module including a body in which are formed several combustion chambers extending parallel to each other along a longitudinal direction between a first end face and a second end face of the body in which they emerge, the distance between the combustion chambers and/or the dimensions of the combustion chambers are chosen so as to reduce a temperature gradient transversal to the combustion chambers.

A combustion module including a body in which are formed several combustion chambers extending parallel to each other along a longitudinal direction between a first end face and a second end face of the body in which they emerge, the distance between the combustion chambers and/or the dimensions of the combustion chambers are chosen so as to reduce a temperature gradient transversal to the combustion chambers.

Disclosed is a fireplace which includes a firebase, a primary combustion zone with a first air supply unit, a secondary combustion zone, and an exhaust flue. The fireplace place also includes a charcoal/reduction layer which forms between the primary combustion zone and the secondary combustion zone, the arrangement and construction being such that the gases and/or particulate matter produced from the pyrolysis and/or combustion of the biomass fuel in the primary combustion zone have to pass over, or through, the charcoal/reduction layer prior to entering the secondary combustion zone and/or the exhaust flue. The fireplace also includes a second air supply unit for introducing heated secondary air into, or adjacent to, the secondary combustion zone, the arrangement and construction being such that the secondary air passes through (or adjacent to the region of) the charcoal/reduction layer to thus heat the secondary air.

Disclosed is a fireplace which includes a firebase, a primary combustion zone with a first air supply unit, a secondary combustion zone, and an exhaust flue. The fireplace place also includes a charcoal/reduction layer which forms between the primary combustion zone and the secondary combustion zone, the arrangement and construction being such that the gases and/or particulate matter produced from the pyrolysis and/or combustion of the biomass fuel in the primary combustion zone have to pass over, or through, the charcoal/reduction layer prior to entering the secondary combustion zone and/or the exhaust flue. The fireplace also includes a second air supply unit for introducing heated secondary air into, or adjacent to, the secondary combustion zone, the arrangement and construction being such that the secondary air passes through (or adjacent to the region of) the charcoal/reduction layer to thus heat the secondary air.

A solid fuel combustion device includes: a fuel supply device including a firewood feed pipe or another fuel supplier; a primary combustion chamber coupled to the fuel supply device; a secondary combustion chamber including a wall formed of a fireproof material and having a structure in which a space is formed at a side of the combustion gas outlet of the primary combustion chamber to induce primary combustion gas to be secondarily expanded and combusted; and an air supply system including at least one air supply device in an entire combustion path formed in the primary combustion chamber and the secondary combustion chamber.

A furnace system includes a burner assembly configured to generate combustion products within a primary combustion zone comprising one or more burners. The furnace system includes a panel disposed downstream of the burner assembly along a flow path for the combustion products, where the panel includes at least one panel opening. The furnace system also includes a secondary combustion air gap defined by one or more spacers disposed between the burner assembly and the panel, such that a secondary combustion zone is established between the burner assembly and the panel and/or downstream of the panel. The secondary combustion air gap is downstream from and external the burner assembly.

A furnace system includes a burner assembly configured to generate combustion products within a primary combustion zone comprising one or more burners. The furnace system includes a panel disposed downstream of the burner assembly along a flow path for the combustion products, where the panel includes at least one panel opening. The furnace system also includes a secondary combustion air gap defined by one or more spacers disposed between the burner assembly and the panel, such that a secondary combustion zone is established between the burner assembly and the panel and/or downstream of the panel. The secondary combustion air gap is downstream from and external the burner assembly.

Heating devices and methods for mitigating heating device pollution are generally described. In an example embodiment, a heating device includes a primary combustion chamber for combustion of a fuel. A first and a second secondary combustion chamber are in fluid communication with the primary combustion chamber for receiving an exhaust flow of combustion products from the primary combustion chamber and are configured for combustion of one or more combustion products received from the primary combustion chamber. The first and second secondary combustion chambers may provide parallel fluid paths from the primary combustion chamber. A secondary combustion selector is provided for selectively allowing the exhaust flow through the first and second secondary combustion chambers.