L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

American Air Liquide, Inc.

L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

Agc Glass Europe

Air Liquide Advanced Technologies U.S. LLC

Bertrand Leroux

Ovidiu Marin

Marc Wagner

Remi Tsiava

Benoit Grand

Remi Pierre Tsiava

Luc Jarry

Rémi Pierre Tsiava

Vivek Gautam

Magnus Mortberg

Gabriel Constantin

Patrick Jean-Marie Recourt

Rajeev S Prabhakar

Taekyu Kang

Olivier Douxchamps

Nicolas Docquier

Pascal Duperray

Robert Kalcevic

Bruno Symoens

Eric Baudelet

Patrick Recourt

Erwin Penfornis

Youssef Joumani

Xavier Paubel

Philippe Beaudoin

Jacky Laurent

Pascal Tromeur

Mohand Amirat

Jacques Mulon

Alban Poirier

Jean-François Simon

Son Ha Giang

Christian Imbernon

Dirk Hoelscher

Alex Grassi

Rémi Tsiava

Loic Sylvestre

Grégoire Beasse

Benoît Grand

Method of operating a rotary furnace for the production of hydraulic binder so as to reduce ring formation therein, whereby the longitudinal temperature profile in the furnace is varied during furnace operation by injecting at least one fluid other than the main fuel(s), the primary oxidizer and hot air from the material cooler with at least one continuously or discontinuously varying injection parameter.

Hydraulic-binder rotary-furnace operation

The present invention relates to a heat exchanger for the supply of oxygen or of a gas mixture containing at least 50% oxygen, the temperature at the outlet of the exchanger not being below 300&#xb0; C., it preferably being above 400&#xb0; C., the oxygen or the oxygen-rich gas feeding one or more burners of a glass melting furnace, the heat of the combustion gases being used directly or indirectly to heat the oxygen or the oxygen-rich gas in the exchanger, in which the exchange power is between 20 and 300 kW, preferably between 40 and 250 kW and particularly preferably between 80 and 170 kW.

Oxygen heat exchanger

Combustion method and installation in which an oxygen-rich oxidant is preheated by exchange of heat with a heat-transfer fluid, upstream of the combustion chamber, in which method and installation an auxiliary gas is heated by heat exchange with a first proportion of the hot flue gases discharged from the chamber, and in which method and installation the heat-transfer fluid comprises a mixture of at least a proportion of the heated auxiliary gas with a proportion of hot flue gases.

Combustion method and installation with optimized energy recuperation

A burner has a fuel/oxidant nozzles and a pair of dynamical lances spaced on either side thereof that inject a jet of fuel and primary oxidant along a fuel injection axis, and jets of secondary oxidant, respectively. Jets of actuating fluid impinge against the jets of secondary oxidant to fluidically angle the jets of secondary oxidant away from the fuel injection axis. The action of the angling away together with staging of the oxidant between primary and secondary oxidant injections allows achievement of distributed combustion conditions.

Distributed combustion process and burner

The invention relates to a method for heating a material in a zone heated by combustion of a fuel with an oxidant by means of a oxyburner comprising an injector arranged within a block defining a chamber with a confinement index Iconf=(S/S')&#xd7;(L/L&#x2032;)&#xd7;(1/(1+a/100))=0.10; the fuel being injected into the burner chamber with a rate IF and the oxidant being injected into the burner chamber at a rate Iox such that 0.7=IF=3.6 et 0.3=Iox=5.1, provided that when Iox&#x3e;3.8 then IF=3.3.

Combustion method and system

Flameless combustion burner

The invention relates to a combustion method which is performed in a furnace that is equipped with energy recovery means and burners, whereby the heat from the combustion fumes is recovered by energy recovery means and said recovered heat is used in order to heat the air. According to the invention, at least part of the burners performs the combustion of an oxygen-rich comburent and a fuel and at least part of the air heated by the energy recovery means is used to heat the oxygen-rich comburent and/or fuel for the burners.

Preheating of fuel and oxidant of oxy-burners, using combustion air preheating installations

During a heating phase, injection of a jet of fuel and oxidant (fuel annularly enshrouding oxidant or oxidant annularly enshrouding fuel) from a fuel-oxidant nozzle is combusted in a combustion space. During a transition from the heating phase to a distributed combustion phase, an amount of a secondary portion of either the fuel or oxidant is injected as a jet into the combustion space while the primary portion of that same reactant from the fuel-oxidant nozzle is decreased. At some point during the transition phase, a jet of actuating fluid is injected at an angle towards the jet of reactants from the fuel-oxidant nozzle and/or towards the jet of the secondary portion of reactant. The jet of primary portions of reactants and/or secondary portion of reactant is caused to be bent/deviated towards the other of the two jets. The staging of the secondary portion of reactant is increased until a desired degrees of staging and commencement of a distributed combustion phase are achieved.

The invention relates to a fuel combustion method in which one jet of fuel and at least two jets of oxidant are injected. According to the invention, the first jet of oxidant, known as the primary oxidant jet, is injected such as to be in contact with the jet of fuel and to produce a first incomplete combustion, the gases produced by said first combustion comprising at least one part of the fuel, and the second jet of oxidant is injected at a distance from the jet of fuel such as to combust with the part of the fuel present in the gases produced by the first combustion. Moreover, the primary oxidant jet is divided into two primary jets, namely: a first primary oxidant jet, known as the central jet, which is injected at the centre of the jet of fuel; and a second primary oxidant jet, knows as the sheathing jet, which is injected coaxially around the fuel jet.

Staged combustion method with optimized injection of primary oxidant

The invention relates to a method for the combustion of a fuel using an oxygenated gas, in which a jet of fuel and at least two jets of oxygen-rich oxygenated gas are injected. According to the invention, the first jet of oxygen-rich oxygenated gas, known as the primary jet, is injected such as to be in contact with the jet of fuel and to produce a first incomplete combustion, the gases produced by said first combustion comprising at least one part of the fuel, and the second jet of oxygen-rich oxygenated gas is injected at a distance I1 from the jet of fuel such as to combust with a first part of the fuel present in the gases produced by the first combustion. Moreover, a low-oxygen oxygenated gas is injected at a distance I2 from the jet of fuel such as to combust with a second part of the fuel present in the gases produced by the first combustion, I2 being greater than I1. The invention also relates to the burner used to carry out the method and to the use of said method for the heating of a glass filler or for a reheating furnace.

Staged combustion method using a low-oxygen gas

The invention concerns a method for burning a fuel by means of at least one a burner, each burner comprising two half-assemblies (') comprising each at least one fuel injecting means () associated with a primary oxidant injecting means (), and at least one secondary oxidant injecting means (), a first oxidant jet being injected at a first distance from the fuel by the primary injecting means so as to generate a first incomplete combustion, and a second oxidant jet being injected at a second distance (L), greater than the first distance, from the fuel injecting means so as to generate a second combustion with the remaining fuel of the first incomplete combustion. Said method is characterized in that each half-assembly delivers a combustion power different from the one delivered by the other half-assembly.

Staged combustion method for producing asymmetric flames

The invention relates to a method for the combustion of a fuel and an oxidant, in which at least one jet of fuel and at least two jets of oxidant are injected. According to the invention, at least one first oxidant is injected at a distance I, at most 20 cm, from the fuel injection point and at least one second oxidant is injected at a distance Ifrom the fuel injection point, Ibeing greater than I. The aforementioned oxidants are injected in quantities such that the sum of the quantities thereof is at least equal to the stoichiometric quantity of oxidant necessary in order to ensure the combustion of the injected fuel. Moreover, the first oxidant is oxygen-enriched air having a temperature of at most 200 DEG C. and the second oxidant is air preheated to a temperature of at least 300 DEG C.

Staged combustion method using a preheated oxidant

The invention relates to a method for melting vitrifiable materials in a low-capacity oven, wherein at least part of the melting energy is supplied by two oxy-burners projecting into the melting chamber through the upstream wall and arranged on opposite sides of a vertical plane in which a longitudinal axis of the melting chamber is situated, in such a way as to create two flames, the respective injection axes thereof crossing at a distance from the upstream wall, between &#x2153; and &#xbe; of the length L of the melting chamber.

Oven and oxy-combustible method for melting vitrifiable materials

The invention concerns a combustion method for industrial furnace comprising an arrangement of two substantially parallel and symmetrical burner assemblies (G, D). Each burner assembly comprises a fuel injector (&#x3c;SUB&#x3e;G&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;D&#x3c;/SUB&#x3e;) and three oxidant injectors (&#x3c;SUB&#x3e;G&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;G&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;G&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;D&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;D&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;D&#x3c;/SUB&#x3e;) arranged at increasing distances from the fuel injector. An oxidant supply system cyclically distributes a specific flow of oxidant among some at least of the second and third injectors of the burner assemblies (&#x3c;SUB&#x3e;G&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;G&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;D&#x3c;/SUB&#x3e;,&#x3c;SUB&#x3e;D&#x3c;/SUB&#x3e;). The amount of nitrogen monoxide produced upon combustion is thus reduced, while ensuring a good distribution of the heating power in the furnace.

Combustion method with cyclic supply of oxidant

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Breuillet, France

Bertrand Leroux