JP2022514328A - Gaseous combustion agent injection assembly and method - Google Patents

Abstract

An assembly for injecting a gaseous combustion agent into a combustion zone, for transporting the chamber (11) and the main flow of the gaseous combustion agent from the chamber (11) to the combustion zone (1), and said to be the main. At least one main injector (21) for injecting a flow into the combustion zone (1), and for transporting a secondary flow of the agent from the chamber (11) to the combustion zone (1), and said sub. With at least one sub-injector (22) for injecting the next flow into the combustion zone (1) and a pressure detector (30) for detecting the gas pressure or fluctuations in the gas pressure in the chamber (11). A regulation system (31) for adjusting the bore section of at least one auxiliary passage fluidly connecting the at least one auxiliary injector (22) to the chamber (11), and a pressure detector (30) and an adjustment system (31). A control system (32) connected to the control system (32) such that the bore section of at least one sub-passage is adjusted in response to the pressure or pressure fluctuation detected by the pressure detector (30). An assembly comprising a control system (32) for operating 31). [Selection diagram] Fig. 1

Description

The present invention relates to an assembly for injecting a gaseous combustion agent into a combustion zone, a burner including such an assembly, and the use of such an assembly / burner in a combustion method.

In industrial combustion methods, for example, in order to convert a load (melting furnace, heating furnace, recycling furnace, etc.), a load adapted to a particular flame characteristic, especially a combustion chamber, and / or intended to be heated. A flame shape and length adapted to the above is sought, thereby obtaining a determined heat transfer profile and optimizing production quality and equipment life.

The characteristics of the flame are determined specifically by the nature of the combustion agents (fuel and oxidizer) and the way they are introduced into the combustion zone (flow rate, velocity, spatial distribution, etc.).

Therefore, from European Patent Application Publication No. A-0763692, a first internal passage for supplying an oxygen-rich oxidant (at least 80% O ₂ ) and a fuel surrounding the first oxidant supply passage. A burner is known that includes an intermediate passage for supplying fuel to the outside and a second external passage for supplying an oxidant that surrounds the passage for supplying fuel to the outside. According to European Patent Application Publication No. A-0763692, the burner comprises a means of varying the flow rate of the oxidant injected through the first internal passage, whereby the flame length, brightness, etc. of the flame. It becomes possible to control the characteristics.

Similarly, what is known from European Patent Application Publication No. A-1016825 is a fuel that externally surrounds a first internal passage for supplying an oxidant and a first oxidant supply passage. It includes an intermediate passage for supply and a second external oxidant supply passage that externally surrounds the fuel supply passage, heating the molten glass transfer channel during glass production and passing through the first oxidant supply passage. The use of a burner to adjust the length of the flame produced by the burner by varying the percentage of the total flow of oxidizer.

The burner described above is a burner with concentric and adjacent injections of fuel and oxidant that produce a flame with an essentially circular cross section.

Other burners produce a flame called a "flat flame" and / or inject at least a portion of the oxidant at a distance from the fuel injection and even away from the fuel injection. Inject at least part.

Accordingly, European Patent Application Publication No. A-21439999 describes a burner including:
-At least two gaseous fuel passages;
• At least one oxidant passage; and • At least one outlet surface terminated by at least one gaseous fuel passage or at least one oxidant passage.

This known burner
Means capable of supplying a stream of oxidant, and means for injecting the stream of oxidant into at least one oxidant passage; and • Means capable of supplying at least one stream of gaseous fuel. , As well as means for injecting this flow of gaseous fuel into at least two gaseous fuel passages,
Also included, thereby producing at least one oxidant jet and at least two gaseous fuel jets that merge in the combustion zone downstream of the burner.

According to European Patent Application Publication No. A-214399, at least two gaseous fuel passages include an internal passage and a coaxial external passage, respectively.

The means for controlling the flow of gaseous fuel regulates the flow of gaseous fuel through the internal passage and the external passage, respectively, by means of a gaseous fuel distributor.

This makes it possible to control both the heat transfer profile and the flame length.

Therefore, it has been found that by adjusting the distribution of fuel or oxidant flow to multiple concentric passages / injectors, it is possible to change certain properties, especially the length of the flame produced. If the known burner does not include a feedback means that allows the burner to behave, and thus the target flame characteristics, to be adjusted in real time.

Surprisingly, it has now been discovered that it is possible to implement such a feedback system based on the detected pressure of the gaseous combustor before it is dispensed.

The present invention relates to an assembly for injecting a gaseous combustion agent into a combustion zone, wherein the gaseous combustion agent is selected from a gaseous fuel and a gaseous oxidant.

The assembly comprises a chamber and the agent is introduced into the assembly through the entrance of this chamber.

The assembly includes at least one main injector for transporting the main flow of agent from the chamber to the combustion zone and injecting the main flow into the combustion zone. For this purpose, at least one main injector is fluidly connected to the chamber by at least one passage called the main passage.

The assembly also includes at least one sub-injector for transporting a secondary flow of agent from the chamber to the combustion zone and injecting the secondary flow into the combustion zone. The at least one sub-injector is then fluidly connected to the chamber by at least one passage called a sub-passage. At least one sub-passage has an adjustable flow section.

For example, an adjustment system in the form of a valve makes it possible to adjust this flow section of at least one sub-passage.

The assembly also includes a pressure detector for detecting pressure or gas pressure fluctuations in the chamber, as well as a control system connected to the pressure detector.

The control system is also connected to a system for regulating and controlling said regulation system so that at least one sub-passage flow section responds to the pressure or pressure fluctuations detected by the assembly's pressure detector. Be adjusted.

According to one embodiment, the control system, which may be an analog or digital control system, adjusts the gas pressure in the chamber to be within a predetermined pressure zone by adjusting the flow section of at least one subpassage. Adapted to control.

According to another embodiment, the control system is adapted to control the control system so that the gas pressure in the chamber matches a predetermined value by adjusting the flow section of at least one sub-aisle. ..

The zone or predetermined pressure range can be constant over time, but it can also be constant over time, eg:
-Depending on the steps of the method, such as the melting method or reheating method in which the assembly is used, which may be periodic or aperiodic, for example;
-Depending on the output required in the combustion zone; or-Depending on the feedback parameters other than the pressure in the chamber of the assembly
Note that it can change.

The above precautions also apply to predetermined values of gas pressure.

As mentioned above, the system for controlling the assembly can be an analog or digital system. It can be mechanical, eg pneumatic or hydraulic. Preferably, the control system is digital. According to a preferred embodiment, the control system is programmable. In this case, in order to practice the injection assembly in accordance with the present invention, the control system is programmed to control the regulation system to activate the regulation system in response to the pressure or pressure fluctuation detected by the pressure detector. The gas pressure or fluctuations in gas pressure detected by the pressure detector are then transmitted to the programmable control system, for example via a wired or wireless connection.

The conditioning system is used to regulate the flow section of at least one sub-passage, such as one or more adjustable valves located in at least one sub-passage between the chamber and the at least one sub-injector. It may include various means for regulating the movement of a mechanical element acting as a valve in one sub-passage, which movement is, for example, translation, rotation (screw), or deformation of the mechanical element connected to the valve. Or by changing the magnetic state of the metal element.

According to a simple and reliable embodiment, the regulation system comprises at least one valve capable of regulating the flow section of said passage by at least partially blocking at least one sub-passage.

Such a regulation system can take the following forms in particular: The at least one sub-passage that fluidly connects the at least one sub-injector to the chamber has a funnel-shaped inner surface, the conditioning system has a valve with a corresponding outer surface, and the valve has a longitudinal axis of the sub-passage. It is possible to move along. When the valve is thus moved along the longitudinal axis, the outer surface of the valve approaches or separates from the inner surface of the sub-passage, and the flow sections of the passage shrink or expand, respectively.

It should also be noted that it may be advantageous to design the regulation system so that the flow section of at least one sub-aisle is never completely closed. In fact, to achieve sufficient cooling of at least one sub-injector and / or to avoid clogging of at least one sub-injector (eg, for the deposition of condensable material present in the atmosphere of the combustion zone). Minimal gas flow through at least one sub-injector may be required due to or due to the formation of soot resulting from overheating of the gaseous fuel in contact with at least one sub-injector). However, ensuring such a minimal gas flow by means other than the regulation system defined above, for example, omitting the valve and simply ensuring this minimal flow, such as a small fluid passage. You can think about it.

Generally, the assembly is made of metal and the injector or at least the downstream end (injection end) is an Inconel® type nickel-chromium austenite steel alloy or Kanthal® type nickel free. Often made advantageously of high heat and oxidation resistant metals such as alloys.

More specifically, the assembly according to the present invention includes at least a pair of main injectors and sub-injectors, one of the main injector and the sub-injector surrounding the other of the main injector and the sub-injector.

Therefore, the main injector can surround the sub-injector, or the sub-injector can surround the pair of main injectors.

According to an advantageous embodiment, the pair of primary injectors is surrounded by the pair of sub-injectors.

According to a particular embodiment, the paired primary and sub-injectors are concentric. However, in some cases, non-concentric arrangements may be useful.

It should be noted that such a pair configuration does not preclude the presence of other elements, in particular the presence of one or more other injectors in or around either one of the pair of injectors.

For example, according to certain embodiments, the fluid can be a gaseous oxidant, such as a gas, containing at least 80% by volume, preferably at least 90% by volume of oxygen. The pair of primary injectors is centrally located and is preferably surrounded by the pair of sub-injectors concentrically. The injector for injecting fuel into the combustion zone is located between the pair of main and sub-injectors so that the fuel injector surrounds the main oxidant injector and is surrounded by the by-oxidant injector, thus the assembly with fuel. The flow section of the sub-injector forms part of the burner for (at least partial) combustion with the oxidant, and thus the distribution of the oxidant between the main and secondary flows as well. It is regulated by the control system by the regulation system according to the gas pressure in the chamber of the assembly detected by the pressure detector or the fluctuation of the gas pressure.

According to another similar embodiment, the fluid is a gaseous fuel such as natural gas. The pair of primary injectors is centrally located and is preferably surrounded by sub-injectors concentrically. An injector for injecting the oxidant into the combustion zone is located between the pair of main and sub-injectors, whereby the oxidant injector surrounds the main fuel injector and is surrounded by the sub-fuel injector. The oxidant is preferably a gas containing at least 80% by volume, more preferably at least 90% by volume of oxygen. Therefore, the assembly forms part of the burner for (at least partial) combustion of the fuel and oxidizer, and the flow section of the secondary injector is therefore also with the main and secondary flow of fuel. The distribution of fuel between is regulated by the control system by the regulation system according to the gas pressure in the chamber of the assembly detected by the pressure detector or the fluctuation of the gas pressure.

The assembly according to the invention can include a single main injector and a single sub-injector, in particular a single pair of main and sub-injectors.

According to an alternative embodiment, the assembly according to the invention comprises a plurality of main injectors and / or a plurality of sub-injectors, in particular a plurality of pairs of a main injector and a sub-injector.

According to a particular embodiment, the at least one sub-injector of the assembly is located away from the at least one main injector of the assembly, where the at least one main injector of the assembly does not surround the sub-injector of the assembly and is assembled. At least one sub-injector of the assembly does not surround the main injector of the assembly.

In this case, at least one main injector can extend specifically to the first plane, while at least one sub-injector extends to the second plane, the second plane parallel to the first plane. Is. In this way, it is possible to inject a major flow and a secondary flow of the gaseous combustion agent into the combustion zone along two parallel planes.

According to an alternative embodiment, the at least one primary injector extends to the first plane, the at least one sub-injector extends to the second plane, and the first and second planes are described above. It intersects downstream of the main and sub-injectors, i.e., within the combustion zone where the gaseous combustion agent is injected.

The assembly according to the invention may include at least two main injectors and / or at least two sub-injectors, preferably at least two main injectors and at least two sub-injectors. This is particularly advantageous when at least one primary injector extends to the first plane and at least one sub-injector extends to a second plane different from the first plane, as described above. ..

To inject the gaseous agent into the combustion zone, the inlet of the assembly, which is also the inlet of the chamber of the assembly, is a source of gaseous fuel, preferably natural gas, biogas, propane, butane, steel production or Fluidly connected to a source of gaseous fuel selected from the residual gas of the methane reforming method, hydrogen, any mixture of said gaseous fuels, or preferably 21-100% by volume, preferably 21 volumes. It is fluidly connected to a source of gaseous oxidant having an oxygen content of more than%, particularly at least 80% by volume, more preferably at least 90% by volume.

Such a source may be a tank of gaseous or liquefied gaseous agent, a supply duct carrying said gaseous agent, or a generator of said gaseous agent.

The present invention also relates to equipment comprising a plurality of assemblies according to any one of the above embodiments. In this case, the equipment can preferably independently control the system for adjusting each assembly of the equipment in response to the gas pressure or fluctuations in gas pressure detected by the pressure detector of the assembly. It may be preferable to include a control system.

As shown above, the assembly can be built into the burner.

Accordingly, such a burner according to the invention comprises an assembly by any one of the above embodiments for injecting a gaseous combustion agent selected from a gaseous fuel and a gaseous oxidant into a combustion zone.

Such burners typically also include at least one additional injector for injecting additional fluid into the combustion zone. As a rule, if the gaseous agent injected by the assembly is a gaseous fuel, then at least one additional injector is suitable for injecting the gaseous oxidant into the combustion zone and the gaseous agent injected by the assembly. If is a gaseous oxidant, at least one additional injector is suitable for injecting fuel (gaseous or non-gaseous) into the combustion zone.

According to one embodiment, the burner comprises a block with an inlet surface and an exit surface opposite the entrance surface. The combustion zone is located downstream of the outlet surface.

Unlike assemblies, blocks are usually made from refractory materials such as cement, or electro-melted materials, or press materials, primarily alumina and / or zirconia and / or silica and / or magnesia or depending on the method used. It is made from a combination of these components in various proportions.

The assembly is then attached to the inlet surface of the block, whereby the injector of the burner, and thus also the injector of the assembly, is placed in one or more perforations passing through the block from the inlet surface to the exit surface.

Thus, the burner according to the invention is, for example, one or more first perforations terminating at the first level of the exit surface of the block, and exit at a second level located below or above the first level. Such blocks may include one or more additional perforations that terminate in a plane. The assembly includes at least two, preferably at least three, main and sub-injectors for transporting and injecting gaseous fuel into the combustion zone. Each of the main injectors forms a pair with one of the sub-injectors. According to one embodiment, each of the main injectors surrounds one of the sub-injectors. According to a preferred embodiment, each of the sub-injectors surrounds one of the main injectors. These pairs are located, for example, in a set of three in one or more first perforations terminating at the first level. The burner also includes multiple additional injectors for transporting and injecting the oxidant into the combustion zone. The additional injectors are arranged in one or more additional passages of the block to allow injection of the oxidant into the combustion zone above or below the gaseous fuel. Additional injectors can extend in a plane parallel to the plane of the pair of secondary and primary injectors. According to another embodiment, the additional injectors are oxidized that intersect the pair plane in the combustion zone downstream of the outlet surface where the oxidant injected by the additional injector mixes and reacts with the fuel injected by the pair. The agent injection plane can be defined.

As already shown above, other than the paired primary and sub-injectors, in particular one or more injectors, may be in or around any one of the paired primary and sub-injectors.

According to the first embodiment, the one or more additional passages are terminated at the exit plane of the block above the one or more first passages. According to another embodiment, the one or more additional passages are terminated at the exit plane of the block below the one or more first passages.

According to a third embodiment, the block terminates at the exit plane at a level above the first level and is populated with at least two, preferably at least three additional injectors for the oxidant 1. One or more additional passages, as well as one or more terminated at the exit plane of the block below the first level, where at least two, preferably at least three additional injectors for the oxidant are also located. Includes additional passageways. This embodiment allows the oxidant to be injected into the combustion zone above, below, or above and below the gaseous fuel, according to the requirements of the method.

The invention also comprises a furnace comprising an internal combustion zone and comprising at least one assembly according to the invention for injecting a gaseous combustion agent selected from a gaseous fuel and a gaseous oxidant into the combustion zone. Regarding the furnace. As shown above, at least one assembly can form part of the burner according to the invention, in which case the furnace comprises at least one burner according to the invention.

The present invention is selected from a furnace for producing or heating glass or enamel, a furnace for producing, recycling or heating metal such as a rotary furnace, or a reverberatory furnace for aluminum, copper or lead, cast iron, steel, etc. It can be carried out particularly advantageously in the furnace.

Another aspect of the present invention is a combustion method in which a gaseous combustion agent is injected into a combustion zone by an assembly according to the invention, in which the gaseous combustion agent is selected from a gaseous fuel and an oxidant, the assembly being the present invention. A part of the burner according to the invention can be formed.

According to this method, the pressure detector of each assembly detects the gas pressure or fluctuations in gas pressure in the chamber of this assembly, and the system for adjusting the assembly has at least one sub-passage flow section thereof. The regulation and control system controls the regulation system so that the flow section of at least one subpassage of each assembly is regulated according to the pressure or pressure fluctuation detected by the pressure detector of this assembly.

As already described above within the context of equipment and furnaces according to the invention, when multiple assemblies are used in a method, each assembly has its own control system connected to a pressure detector and regulation system. The control system can now control the control system such that the flow section of at least one sub-passage is adjusted in response to the pressure or pressure fluctuation detected by the pressure detector in the assembly. However, often advantageously, a common control system can control the system for adjusting each assembly in response to the pressure or pressure fluctuations detected by the pressure detectors of the relevant assemblies.

Also, as already shown, the system for adjusting the assembly is such that the gas pressure in the chamber of the assembly is located in a given pressure zone, or even the gas pressure in the chamber of the assembly matches a given value. Can be controlled to do so.

The gaseous combustion agent injected into the combustion zone by the assembly is gaseous selected from natural gas, biogas, propane, butane, residual gas of steelmaking or methane reforming methods, hydrogen or any mixture of the above gases. A fuel or gaseous oxidant, preferably a gaseous oxidant having an oxygen content of 21-100% by volume, preferably more than 21% by volume, particularly at least 80% by volume, more preferably at least 90% by volume. ..

The method according to the invention is particularly for generating combustion in a combustion zone in the context of methods such as the production or recycling of glass or enamel, the production or recycling of metals such as aluminum, copper, lead, cast iron, steel, etc. or heating. It is useful.

The present invention and its advantages will be better understood in the light of the following examples (see FIGS. 1-5).

An assembly comprising a main injector (21) and a concentric sub-injector (22), wherein the sub-injector (22) surrounds the main injector (21) is shown schematically. An assembly comprising a main injector (21) and a concentric sub-injector (22), wherein the main injector (21) surrounds the sub-injector (22) is shown schematically. An assembly containing a main injector (21) and a non-concentric sub-injector (22) separated by distance is shown schematically. The assembly incorporated in the burner for injecting the gaseous combustion agent into the combustion zone (1) is shown schematically. The assembly incorporated in the burner for injecting the gaseous combustion agent into the combustion zone (1) is shown schematically.

FIGS. 1, 2, and 3 show the fluid inlet chamber (11). The main injector (21) is fluidly connected to the chamber (11) by a main passage (23). The sub-injector is fluidly connected to the chamber (11) by a sub-passage (24). The sub-passage (24) has an adjustable flow section. The regulation system (32) allows this flow section of the sub-passage (24) to be regulated by the valve (33).

FIGS. 1, 2 and 3 also show a pressure detector (30) for detecting gas pressure or fluctuations in gas pressure in the chamber (11), and a control system (31) connected to the pressure detector (30). Is shown. The control system is also connected to and controls the regulation system (32).

FIG. 4 schematically represents an assembly containing three main injectors (21), each surrounded by its concentric sub-injectors (22), and a chamber (11).

The main injector (21) is fluidly connected to the chamber (11) by a main passage (23). The sub-injector (22) is fluidly connected to the chamber (11) by a sub-passage (24). The secondary passage has an adjustable flow section. The regulation system (32) allows this flow section of the sub-passage (24) to be regulated by the valve (33). A pressure detector (30) is present to detect pressure or gas pressure fluctuations within the chamber (11). The control system (31) is connected to the pressure detector (30). This control system is also connected to and controls the regulation system (32).

In FIGS. 4 and 5, the burner is a block (40) with an inlet surface (41) and an outlet surface (42) opposite the inlet surface, as well as an addition for injecting additional fluid into the combustion zone (1). Injector (50) is included.

The automatic adjustment by the feedback system according to the present invention can be advantageously carried out in various combustion methods such as glass production.

The glass manufacturing furnace mainly uses air preheated to more than 1000 ° C. as an oxidant. This hot air is obtained by passing through a regenerator (a stack of refractory bricks). The amount of oxidizer injected into the furnace at this temperature level is accompanied by considerable momentum.

During the systematic movement of the furnace, it may be necessary to increase production beyond the capacity of the regenerator, but the regenerator cannot supply large amounts of hot air due to limited fan suction. Similar problems occur when the condition of the brick does not provide or no longer provides the desired preheating temperature.

In that case, burner equipment (oxygen burner) that operates with oxygen-rich oxidants seems to be a particularly suitable solution. These burners are usually installed in openings near the regenerator. With oxygen combustion (ie, combustion with an oxidant containing at least 80% by volume, preferably at least 90% by volume) of oxygen producing a quarter of the amount of smoke in air combustion, and with at least equivalent efficiency. The flame from the oxygen burner (hereinafter referred to as "oxygen flame") is violently disturbed by the flame from the regenerator operated by hot air (called "aero flame") due to the low momentum of the oxygen flame. These disturbances can result in interference between the oxygen flame and the molten solid and unburned materials, and thus glass quality or energy efficiency issues. These problems become even more pronounced when the output of the oxygen burner (and thus the flow of combustion agent) is reduced for lower increased production stages. Therefore, it is essential to maximize the wave or momentum of the oxygen flame over the output range of the oxygen burner.

A system as described in European Patent No. 2143999 is between two injections (main and sub) in order to maximize the wave motion of the fuel and thus to ensure the flame stability of the oxygen burner. It is possible to manually regulate the flow of gaseous fuel. However, these manual systems always require operator adjustment of fluid distribution, and the effect of these adjustments on the method cannot be easily evaluated in real time. To avoid these adjustment and quality issues, operators most often adjust the output of the air burner (regenerator), which causes over-consumption of oxygen and increased manufacturing costs.

In this case, the invention can be advantageously used by defining a predetermined pressure range or a predetermined pressure, ensuring automatic distribution of flow between the main and sub-injections, thereby summing up the fuel. It makes it possible to maximize the wave motion of the oxygen flame regardless of the flow rate.

For example, if the production is increased by 4%, the output of the oxygen burner can be 800 kW, while if the oxygen is increased by 8%, the output of the oxygen burner can be 1.8 MW. It has been confirmed that a pressure of 300 mbar in the distribution chamber between the two fuel injections can provide a very stable flame at both 800 kW and 1800 kW. Therefore, the automated adjustment of fuel distribution according to the gas pressure in the chamber as the power changes makes it possible to optimize manufacturing costs, limit quality defects and optimize energy consumption. ..

Claims (15)

An assembly for injecting a gaseous combustion agent into a combustion zone, wherein the gaseous combustion agent is selected from a gaseous fuel and a gaseous oxidant, and the assembly is:
A chamber (11) having an inlet into which the agent is introduced into the assembly.
At least one main injector (21) for transporting the main flow of the agent from the chamber (11) to the combustion zone (1) and for injecting the main flow into the combustion zone (1). ), The at least one main injector (21), wherein the at least one main injector is fluidly connected to the chamber (11) by at least one main passage (23).
At least one sub-injector for transporting a secondary flow of the agent from the chamber (11) to the combustion zone (1) and for injecting the secondary flow into the combustion zone ( 22), wherein the at least one sub-injector comprises at least one sub-injector (22) fluidly connected to the chamber by at least one sub-passage (24).
The assembly is also
A pressure detector (30) for detecting gas pressure or fluctuations in gas pressure in the chamber,
A regulation system (31) for regulating the flow section of the at least one sub-passage, and a control system (32) connected to the pressure detector and the regulation system, wherein the at least one sub-passage. Control system (32), which controls the regulation system so that the flow section of the regulation is adjusted in response to the pressure detected by the pressure detector or the fluctuation of the pressure.
Assembly including. The control system adjusts the flow section of the at least one sub-passage so that the gas pressure in the chamber is within a predetermined pressure zone or the gas pressure in the chamber is at a predetermined value. The assembly of claim 1, which controls the conditioning system to match. The assembly of claim 1 or 2, wherein the regulation system comprises at least one valve (33) capable of regulating the flow section of the at least one sub-passage. 13. Assembly. The assembly according to any one of claims 1 to 4, comprising at least two main injectors and / or at least two sub-injectors, preferably at least two main injectors and at least two sub-injectors. A facility comprising the plurality of assemblies according to any one of claims 1 to 5, wherein the facility is preferably a common control system connected to the pressure detector in each assembly. Equipment with a common control system capable of controlling the adjustment system of each assembly in response to the gas pressure or fluctuations in gas pressure detected by the pressure detector in the assembly. The assembly according to any one of claims 1 to 6 for injecting a gaseous combustion agent selected from a gaseous fuel and a gaseous oxidant into the combustion zone and injecting additional fluid into the combustion zone. Burner with at least one additional injector for. A block (40) including an inlet surface (41) and an exit surface (42) opposite to the entrance surface (41) is provided, and the injector of the burner pushes the block from the entrance surface to the exit surface. 7. The burner of claim 7, wherein the assembly is attached to the inlet surface (41) of the block (40) so that it is placed within one or more perforations that pass through. The main and sub-injectors of the assembly form a pair of main and sub-injectors, the pair is placed in at least one first perforation of the block (40), and the at least one additional injector is said. The burner of claim 8, which is located within at least one additional perforation of the block (40). The pair comprises at least two pairs and at least two additional injectors, the pair defining a first injection plane of the fluid, and the injector providing a second injection plane of the additional fluid that is different from the first plane. According to claim 9, the second plane is parallel to the first plane or oriented so as to intersect the first plane in the combustion zone downstream of the outlet surface (42). The burner mentioned. One of claims 1 to 5, wherein the furnace is provided with an internal combustion zone, and a gaseous combustion agent selected from a gaseous fuel and a gaseous oxidant is injected into the internal combustion zone of the furnace. A furnace comprising at least one assembly according to claim, wherein the at least one assembly optionally forms a portion of the burner according to any one of claims 7-10. A common control system comprising multiple assemblies and connected to the pressure detector in each assembly, wherein the gas pressure or gas pressure fluctuations in each assembly are detected by the pressure detector in the assembly. 11. The furnace of claim 11, preferably comprising a common control system capable of controlling the regulation system. In a combustion method, a gaseous combustion agent selected from a gaseous fuel and an oxidant is injected into an internal combustion zone by the assembly according to any one of claims 1 to 5, wherein the assembly is claimed 7 to 5. A part of the burner according to any one of 10 is optionally formed, and the method is:
The pressure detector in the assembly detects the gas pressure in the chamber of the assembly.
A system for adjusting the assembly regulates the flow section of the at least one sub-passage.
A system for controlling the assembly is such that the flow section of the at least one sub-passage is adjusted according to the pressure or pressure fluctuation detected by the pressure detector of the assembly. Control the system for adjusting,
Combustion method. The control system adjusts the flow section of the at least one subpassage of the assembly so that the gas pressure in the chamber is within a predetermined pressure zone, or the gas in the chamber of the assembly. 13. The method of claim 13, wherein the regulation system is controlled so that the pressure matches a predetermined value. The gaseous fuel is a gaseous fuel selected from natural gas, biogas, propane, butane, residual gas of steelmaking or methane reforming methods, hydrogen or any mixture of at least two of these gaseous fuels. 23 or 14 of claim 13 or 14, wherein the gaseous oxidant has an oxygen content of 21 to 100% by volume, preferably more than 21% by volume, particularly at least 80% by volume, more preferably at least 90% by volume. the method of.

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