A reverse-jet swirl pulverized coal burner with multi-stage recirculations includes a pre-combustion housing, a primary coal-air structure, a rich-lean output structure, an inner secondary air structure, and an outer secondary air structure. The pre-combustion housing has a pre-combustion chamber and a housing outlet. The primary coal-air structure is configured to separate a primary coal-air flow into a fuel-rich coal-air flow and a fuel-lean coal-air flow. The rich-lean output structure is configured to output the fuel-lean coal-air flow and block the fuel-rich coal-air flow to make the fuel-rich coal-air flow reversely flow to the pre-combustion chamber. The inner secondary air structure is configured to introduce an inner secondary air into the pre-combustion chamber, thereby forming a first-stage recirculation zone in the pre-combustion chamber and forming a second-stage recirculation zone. The outer secondary air structure is configured to form a third-stage recirculation zone at the housing outlet.

The invention relates to a system and process for hydrogen combustion for industrial or steam generation applications, and more particularly to a hydrogen combustion burner or retrofit kit combustion system and process using a primary pure hydrogen fuel source. The burner or retrofit kit combustion system and process may also use one or more secondary fuels, such as natural gas, methane, propane, or the like, to reduce emissions of CO.sub.2. Additionally, the inventive burner, system and process can use a flame temperature reducing fluid for lowering the bulk flame temperature of the burner to increase equipment life and decrease equipment failure. The flame temperature reducing fluid can include flue gas recirculation (FGR), water injection, steam injection, and a combination thereof.

A combustor of an embodiment includes: a cylindrical combustor liner; and a fuel nozzle which is provided at one end of the combustor liner and jets a fuel and an oxidant into the combustor liner. The fuel nozzle includes: a plurality of fuel supply passages which each supply the fuel; and a plurality of oxidant supply passages which each supply the oxidant. Flow rates of the fuel supplied to the respective fuel supply passages and flow rates of the oxidant supplied to the respective oxidant supply passages are each individually regulated.

A burner is provided which includes a tile surrounding an opening of the tile extending along a burner axis, the tile including a front side and a rear side, wherein the rear side has an air inlet connected to the opening for feeding air into the opening, and the front side has a discharge outlet connected to the opening for discharging a flame into a surrounding area. The burner includes at least one oxygen lance extending along the burner axis in a first recess of the tile, and the oxygen lance having an ejection nozzle at an end region of the lance for ejecting oxygen, wherein the at least one oxygen lance is mounted with the ejection nozzle positioned along the burner axis to be adjustable between an uppermost position and a lowermost position via a zero-position in between the uppermost position and the lowermost position.

A portable, yard waste incinerator system with a large burn tank located on a transport and configured for burning yard waste. Located inside the burn tank is lower primary combustion chamber and an upper secondary chamber, Located inside the primary burn housing with a burner. Propane fuel is connected to an external propane gas source which delivers propane to the burner. The primary burn housing includes a plurality of holes that allows flames and hot gases from the fire and heat from the primary combustion chamber to extend into a secondary combustion chamber. The system also includes a vacuum system which picks up small, loose combustible debris from the yard and delivers the debris and oxygen to the secondary combustion chamber. The system also includes an optional electric generator that energizes the vacuum system and an optional shredder that delivers shredded yard waste to the secondary burning chamber.

A burner operating with flameless combustion, comprising a system for sucking the recycling flue gases directly from the combustion chamber by means of an ejector fed with the comburent, a heat exchange system positioned between the recycling flue gases and the comburent, a system for injecting the fuel directly into the recycling flue gases, the latter comprising or not comprising the comburent with formation of a mixture of fuel-recycling flue gases-comburent in the zone around the outlet of the comburent ejector and following introduction of the mixture into the combustion chamber.

This solid fuel burner is provided with: a venturi tube in which a channel for mixed fluid in a fuel nozzle narrows toward the center in the channel cross section; a fuel concentrator that imparts, to the mixed fluid, a velocity component away from the center of the fuel nozzle; and a channel separation member that separates the channel of the fuel nozzle into an internal side and an external side; wherein the channel separation member is shaped in such a way that the cross sectional area of an external channel is larger at the downstream end than at the upstream end, and the upstream end of the fuel concentrator is located between the upstream end and the downstream end of an expanded portion of the venturi tube. This solid fuel burner prevents solid fuel particles, which is ground biomass fuel, from adhering and depositing inside the nozzle.

A combustor of an embodiment includes: a cylindrical combustor liner; and a fuel nozzle which is provided at one end of the combustor liner and jets a fuel and an oxidant into the combustor liner. The fuel nozzle includes: a plurality of fuel supply passages which each supply the fuel; and a plurality of oxidant supply passages which each supply the oxidant. Flow rates of the fuel supplied to the respective fuel supply passages and flow rates of the oxidant supplied to the respective oxidant supply passages are each individually regulated.

A portable, yard waste incinerator system that includes a transport vehicle with a large burn tank configured for burning yard waste. Located inside the burn tank is a primary burner that forms an inner primary combustion chamber and an outer secondary chamber. Propane fuel is connected to an external propane gas source which delivers propane to the primary combustion chamber. The primary burner includes a plurality of holes that allows flames and hot gases from the fire and heat from the primary combustion chamber to extend into a secondary combustion chamber. The system also includes a vacuum system connected to the burn tank which picks up small, loose combustible debris from the yard and delivers the debris and oxygen to the secondary combustion chamber. The system also includes an optional electric generator that energizes the vacuum system and an optional shredder that delivers shredded yard waste to the secondary burning chamber.

Processes and systems for producing glass fibers having regions devoid of glass using submerged combustion melters, including feeding a vitrifiable feed material into a feed inlet of a melting zone of a melter vessel, and heating the vitrifiable material with at least one burner directing combustion products of an oxidant and a first fuel into the melting zone under a level of the molten material in the zone. One or more of the burners is configured to impart heat and turbulence to the molten material, producing a turbulent molten material comprising a plurality of bubbles suspended in the molten material, the bubbles comprising at least some of the combustion products, and optionally other gas species introduced by the burners. The molten material and bubbles are drawn through a bushing fluidly connected to a forehearth to produce a glass fiber comprising a plurality of interior regions substantially devoid of glass.