Air Products and Chemicals, Inc.

Combustion Tec

Xothermic, Inc.

Combustion Tech, Inc

James K Nabors

Mahendra L Joshi

Aleksandar Georgi Slavejkov

William C Andrews

Zbigniew Zurecki

Lee Broadway

A heated crucible apparatus allows the adjustment of a thermal profile within a combustion chamber surrounding the crucible by introducing a sub-stoichiometric or a super-stoichiometric mixture of fuel and oxidant into the combustion chamber and varying the oxidant flow for sub-stoichiometric or fuel flow for super-stoichiometric downstream of the initial combustion to control the release of heat in defined areas within the combustion chamber. The adjustable thermal control system allows for an even thermal energy release or varying thermal energy release over the length of the crucible. The apparatus a crucible having an inlet and and outlet surrounded by the combustion chamber which chamber includes an oxidant and fuel supply at the primary injection point followed by secondary injection of the remaining oxidant supply for sub-stoichiometric (or fuel supply for super-stoichiometric) at specific intervals to achieve the desired thermal profile and heating of the crucible. The oxidant and/or fuel stream may be pre-heated to maximize thermal efficiency. The combustion system allows for the use of gaseous, liquid and solid fuels as well as oxidant streams with varying concentrations of oxygen. The crucible has a cooling heat exchanger located adjacent the outlet to control the temperature of materials leaving the crucible.

Adjustable thermal profile heated crucible method and apparatus

A burner apparatus for the combustion of a fuel and an oxidizer includes a burner block having a fuel line for feeding fuel to a fuel port opening into a combustion chamber and a plurality of primary and secondary oxidizer lines positioned around the fuel line for feeding an oxidizer to a primary and secondary oxidizer port to the combustion chamber for combustion with the fuel from the fuel port. The primary and secondary oxidizer lines and ports are spaced around the fuel port so that controlling the oxidizer is used to change the position and shape of the flame in the combustion chamber. First and second oxidizer valves are located in the oxidizer feed lines and vary the amount of oxidizer fed through the oxidizer line so that the first and second oxidizer control valves for each set of oxidizer lines are spaced around the fuel port to allow both the position and the shape of the burner flame to be controlled. A method of controlling a flame's position and shape in a burner combustion chamber is provided by varying the feed of oxidizer to each pair of oxidizer ports and proportioning the oxidizer between each primary and adjacent secondary oxidizer port.

Burner apparatus and method

Method and apparatus for generating oxy-liquid fuel with lowered NO.sub.x products using low pressure oxygen to atomize liquid fuel and produce an oxy-liquid fuel flame and surrounding the oxy-liquid fuel flame by an oxidizer, confining the oxy-liquid fuel flame and oxidizer in a precombustor for a distance determined by the rate of flame propagation and the diameter of the pre-combustor.

Process and device for combustion-enhanced atomization and vaporization

Method and apparatus for generating an oxy-fuel flame with lowered NOX products by confining the oxy-fuel flame produced in a concentric orifice burner along a path defined by the rate of flame propagation and the diameter of the burner.

Method and apparatus for oxy-fuel heating with lowered NO.sub.x in high

The disclosed combustor apparatus provides for independent flow streams, one for oxidizer and one for fuel. The adjustable control capability permits various flame configurations and reproducible combustion rates at different oxidizer/gaseous fuel flow rates. The apparatus includes an oxidizer supply which is separated into a primary oxidizer path and a secondary oxidizer path, the flow rate in each of these paths being regulated. The primary oxidizer path and the secondary oxidizer path are combined in an oxidizer channel within a burner block of the burner assembly prior to exiting the burner assembly. Flow may be provided to only one of these paths should that be desired. A recombined oxidizer flow stream, of a non-homogenous velocity cross-section, is thus formed at the exit of the oxidizer channel. The burner apparatus also includes an gaseous fuel supply which is separated into a primary gaseous fuel path and a secondary gaseous fuel path, the flow rate in each of these paths being regulated. The primary gaseous fuel path and the secondary gaseous fuel path are combined in a gaseous fuel channel within the burner block prior to exiting the burner assembly. A recombined gaseous fuel flow stream of a non-homogenous velocity cross-section, is thus formed at the exit of the gaseous fuel channel.

Burner apparatus and method of operation thereof

An oxy-fuel system for reducing NO.sub.x formation in corrosive high temperature environments including a self-cooled adjustable oxy-fuel burner that generally produces a luminous flame having a concentric fuel rich phase and an outer surrounding oxidizer rich phase the flame directed through a precombustor mounted on the flame end of the burner the precombustor having a length to diameter (L/d) ratio fixed by the firing rate of the burner.

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Apopka, FL, United States of America

James K Nabors