A combustor includes an end cap having upstream and downstream surfaces and a cap shield surrounding the upstream and downstream surfaces. First and second sets of premixer tubes extend from the upstream surface through the downstream surface. A first fuel conduit supplies fuel to the first set of premixer tubes. A casing circumferentially surrounds the cap shield to define an annular passage, and a second fuel conduit supplies fuel through the annular passage to the second set of premixer tubes. A method for supplying fuel to a combustor includes flowing a working fluid through first and second sets of premixer tubes, flowing a first fuel into the first set of premixer tubes, and flowing a second fuel through an annular passage surrounding the end cap and into the second set of premixer tubes.

Combustor and method for supplying fuel to a combustor

A glass-melting furnace (10) has an upstream end (6), a downstream end (8), and a roof (22). The upstream end is positioned upstream of the downstream end. A charger (32) is provided to supply glass-forming material (30) to the upstream end of the furnace. At least one burner (34) is provided to supply heat to the glass-forming material at the upstream end of the furnace. An exhaust (60) is in communication with the downstream end of the furnace, with the exhaust being positioned downstream of the at least one burner.

Exhaust positioned at the downstream end of a glass melting furnace

A front end for a glass forming operation including an open channel (22) and at least one burner (44). The channel surface (46) has at least one humer port (42) and a humer oriented in the burner port at an acute angle (B) relative to the channel surface. The surface may be a top, side or end wall and the humer port is at an acute angle relative to the surface of the wall. The used burners are preferably oxygen-gas burners, which are reducing CO2 and NO2 emissions. These burners are more environmentally friendly and possibly reducing greenhouse gas taxes.

Low heat capacity gas oxy fired burner

Inorganic fiber production burner apparatus and methods of use are disclosed. One burner includes a refractory block adapted to be in fluid connection with sources of primary oxidant and fuel, the refractory block having a fuel and primary oxidant entrance end and a flame exit end, the flame exit end having a substantially rectangular flame exit having a width greater than its height, the refractory block defining a combustion chamber and a second chamber fluidly connecting the combustion chamber and the flame exit end; and an oxygen manifold fluidly connected to the combustion chamber and adapted to route oxygen to the combustion chamber through a plurality of passages through the refractory block. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Burner apparatus and methods for making inorganic fibers

A method comprises flowing an oxidant and a fuel into a submerged combustion burner in a glass tank furnace, the glass tank furnace receiving a feed of glass forming material and producing molten glass, the burner and furnace comprising a melting system. The melting system has a variable system vibration and/or oscillation due to the nature of submerged combustion. One method includes predicting a value of at least one property, such as viscosity, of the molten glass using the variable system vibration and/or oscillation.

Methods of using a submerged combustion melter to produce glass products

A self-cooled oxidant-fuel burner consisting novel fuel and oxidant nozzles and three compartment refractory burner block design is proposed. The new oxidant-fuel burner can fire in high-temperature (2200° F. to 3000° F.) and high-particulate (or high process volatiles/condensates) furnaces without over-heating or causing chemical corrosion damage to it's metallic burner nozzle and refractory burner block interior. Using various embodiments of nozzle and block shape, the burner can offer a traditional cylindrical flame or flat flame depending on the heating load requirements. The new features of this burner include unique fuel nozzle design for the streamline mixing of fuel and oxidant streams, a controlled swirl input to the oxidant flow for desired flame characteristics, a controlled expansion of flame envelope in the radial and axial dimensions, and efficient sweeping of burner block interior surface using oxidant to provide convective cooling and prevent any build up of process particulates. In addition, a relatively thick wall metallic nozzle construction with heat conduction fins enable efficient heat dissipation from the nozzle tip and providing a maintenance free burner operation.

Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces

A self-cooled oxidant-fuel burner consisting novel fuel and oxidant nozzles and three compartment refractory burner block design is proposed. The new oxidant-fuel burner can fire in high-temperature (2200°F to 3000°F) and high-particulate (or high process volatiles/condensates) furnaces without over-heating or causing chemical corrosion damage to it's metallic burner nozzle and refractory burner block interior. Using various embodiments of nozzle and block shape, the burner can offer a traditional cylindrical flame or flat flame depending on the heating load requirements. The new features of this burner include unique fuel nozzle (16) design for the streamline mixing of fuel and oxidant streams, a controlled swirl (24) input to the oxidant flow for desired flame characteristics, a controlled expansion of flame envelope in the radial and axial dimensions, and efficient sweeping of burner block (4) interior surface using oxidant to provide convective cooling and prevent any build up of process particulates. In addition, a relatively thick wall metallic nozzle construction with heat conduction fins (18) enable efficient heat dissipation from the nozzle tip and providing a maintenance free burner operation.

Self-cooled oxygen-fuel burner for use in high temperature furnaces

A self-cooled oxidant-fuel burner consisting novel fuel and oxidant nozzles and three compartment refractory burner block design is proposed. The new oxidant-fuel burner can fire in high-temperature (2200 DEG F to 3000 DEG F) and high-particulate (or high process volatiles/condensates) furnaces without over-heating or causing chemical corrosion damage to it's metallic burner nozzle and refractory burner block interior. Using various embodiments of nozzle and block shape, the burner can offer a traditional cylindrical flame or flat flame depending on the heating load requirements. The new features of this burner include unique fuel nozzle (16) design for the streamline mixing of fuel and oxidant streams, a controlled swirl (24) input to the oxidant flow for desired flame characteristics, a controlled expansion of flame envelope in the radial and axial dimensions, and efficient sweeping of burner block (4) interior surface using oxidant to provide convective cooling and prevent any build up of process particulates. In addition, a relatively thick wall metallic nozzle construction with heat conduction fins (18) enable efficient heat dissipation from the nozzle tip and providing a maintenance free burner operation.

Improved self-cooling oxygen-fuel burner for high temperature micropowder furnace and its burning method

PROBLEM TO BE SOLVED: To ensure high temperature combustion while protecting the nozzle, and the like, of a burner against damage due to overheat or corrosion attributed to high temperature microparticles by providing a fuel nozzle for mixing fuel and oxidizing agent, a spiral being inserted into an oxidizing agent flow, and a burner block utilizing an oxidizing agent for blocking expansion of flame tube and processing fine particles. SOLUTION: A burner unit 2 comprising a heating face 6, an outlet 8 for high temperature combustion gas, an end part 10 and a refractory burner block 4. A fuel duct 12 and an oxidizing agent duct 14 are coupled with the end part 10 of the burner block 4. An oxidizing agent plenum 20 is provided in order to enter the oxidizing agent into a tubular oxidizing agent passage 22. The oxidizing agent passes through a spiral chamber 26 and an oxidizing agent expansion chamber 28, it is not spread. When mixing of fuel is completed, the oxidizing agent passes through a combustion cavity 30 before exiting from an outlet 8 and moves while performing spiral motion. Each region of the burner block 4 has a purpose for creating optimal flame characteristics based on formation of the entire flame. COPYRIGHT: (C)2000,JPO

Ovidiu Marin

Papers

Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces

Self-cooled oxygen-fuel burner for use in high temperature furnaces

Improved self-cooling oxygen-fuel burner for high temperature micropowder furnace and its burning method

Burner unit and combustion method employing it