Drying apparatus

Abstract

The invention relates to a drying apparatus (1) for the continuous drying of a moving web material (2). The apparatus comprises: - a radiative or heating element (6), combustion gases; - an air flow circulation system (8) configured to draw combustion products produced by the radiative or heating element (6). The air flow circulation system (8) also comprises an extraction duct (16) configured to extract at least a portion of the combustion products drawn by the air flow circulation system (8) from the apparatus (1). The apparatus (1) also comprises means (18) for treating carbon monoxide and optionally nitrogen oxides, the treatment means (18) comprising an oxidation and optionally a reduction catalyst (20) and being mounted on said extraction duct (16) or downstream of the extraction duct so as to treat the carbon monoxide and optionally the nitrogen oxides contained in the combustion products. The apparatus (1) in particular comprises regulation means (22) configured to regulate the temperature of the catalyst (20) at a temperature greater than or equal to 130°C.

Description

Technical Field

[0001] This invention relates to an apparatus for drying moving web materials (particularly paper). Background Technology

[0002] Settling on continuous web material requires heat treatment. This heat treatment must typically be performed non-contactly to preserve the quality of the web material's surface condition and the quality of the settling thereon. This applies, for example, to paper webs undergoing wet processing (such as processes used in the production of art paper). Systems for continuous heat treatment of web material are known, combining infrared radiation and heating by convection. Systems exist that include infrared gas emitters, whose hot gases are drawn in through suction nozzles and discharged onto the web through blowing nozzles, forming a combined system of heat treatment by radiation and convection.

[0003] Document US 6,088,930 discloses a convection and radiation system for heat treatment of a web, the system facing a gas infrared radiating element and an element blowing hot air moving on the web. The system includes a series of blowing elements spaced apart from each other by at least one gas infrared radiating element. Each blowing element includes a suction element on each side extending close to the gas infrared radiating element.

[0004] Document WO 2005 / 085729 describes a system that reduces mechanical energy consumption and heat loss, decreases investment and operating costs, and requires less space. The drying equipment is characterized by a mass transfer system comprising at least one suction device and an optional blowing device, mounted with opposite bandwidths relative to corresponding suction and blowing ducts extending at least in the transverse direction of the web, and arranged to suction and / or blow the combustion products in a manner that optimizes vector averages. The vector represents the trajectory of various jets of the suction and / or blowing combustion products.

[0005] In this way, heat transfer between the combustion products and the channel plane can be maximized, and an extremely compact dryer device can also be obtained, in which the combustion products are blown at the highest possible temperature. Summary of the Invention

[0006] The purpose of this invention is to improve the operation of the aforementioned equipment. In particular, the purpose of this invention is to provide an apparatus for drying mobile web materials that is more environmentally friendly. More specifically, the purpose of this invention is to provide an apparatus for drying mobile web materials with a lower ecological impact.

[0007] Therefore, according to one aspect, a drying apparatus is provided for continuous drying of moving web materials. The apparatus includes:

[0008] - A radiant or heating element that ignites a gas or gaseous mixture (e.g., a premixture of gas and air).

[0009] - An airflow circulation system, or mass transfer system, such as one with natural or forced convection, is configured to draw in combustion products generated by radiation or heating elements.

[0010] The airflow circulation system also includes an extraction pipe configured to evacuate at least a portion of the combustion products drawn in by the airflow circulation system from the device.

[0011] The equipment also includes a device for treating combustion products, the device comprising an oxidation and / or reduction catalyst, and the device being mounted on or downstream of the extraction tube to treat carbon monoxide and / or nitrogen oxides contained in the combustion products, respectively.

[0012] For example, catalysts may include catalysts for oxidizing carbon monoxide to carbon dioxide and / or catalysts for reducing nitrogen oxides NOx to dinitrogen (molecular nitrogen) N2.

[0013] The treatment device allows for the treatment of gases emitted by the equipment in order to limit the amount of carbon monoxide and / or nitrogen oxides present therein.

[0014] The device specifically includes a regulating device configured to regulate the temperature of the catalyst to a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C or even 300°C or 400°C.

[0015] Therefore, the device is configured to operate the processing unit under optimal temperature conditions. More specifically, the device is configured to operate the processing unit at a temperature that allows for high efficiency throughout the entire operation of the device.

[0016] Preferably, the regulating device is configured to heat the catalyst to a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C or even 300°C or 400°C, and / or the regulating device is configured to maintain the catalyst at a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C or even 300°C or 400°C.

[0017] More specifically, the equipment is configured to operate the catalyst at its optimal temperature conditions to ensure high efficiency of oxidation and / or reduction reactions throughout the operation of the equipment. Furthermore, heating the catalyst to very high temperatures (particularly 300°C or 400°C) allows for the same efficiency at the output of the processing unit compared to processing units operating at lower temperatures, but with less precious metals in the catalyst.

[0018] Preferably, the regulating device includes heating elements, such as electronic components and / or heat exchangers and / or induction devices, configured to provide heat to the catalyst.

[0019] Electronic or inductive heating devices (such as heating resistors or coils) allow for a rapid and controlled rise in catalyst temperature. Such devices are particularly useful during the transient operation of the equipment (e.g., during startup), when the combustion products to be processed may have temperatures below those required for the processing unit to operate. In particular, inductive heating devices are especially advantageous for concentrating energy transfer at the point where the thermal energy is most readily available in the catalyst, through the selection of materials and / or geometry. Similarly, heat exchangers can be used to reuse heat (calories) available elsewhere in the equipment to raise the catalyst temperature while limiting the equipment's energy consumption (particularly electrical energy).

[0020] Preferably, the regulating device includes a control device configured to control a radiation or heating element, and / or an airflow circulation system and / or a processing device, in order to regulate the temperature of the catalyst.

[0021] The control device can be configured to control valves, check valves, etc., especially in airflow circulation systems, or to control the power supply, power, distribution, etc. of radiant or heating elements.

[0022] Preferably, the regulating device includes at least one carbon monoxide and / or nitrogen oxide sensor installed upstream or downstream of the catalyst, configured to measure the amount of carbon monoxide and / or nitrogen oxides contained in the combustion products upstream and / or downstream of the catalyst, respectively. For example, the regulating device may include a carbon monoxide (and optionally nitrogen oxide) sensor installed upstream of the catalyst and a carbon monoxide (and optionally nitrogen oxide) sensor installed downstream of the catalyst.

[0023] Carbon monoxide and nitrogen oxide sensors allow for the determination of the amounts of carbon monoxide and nitrogen oxides present in the combustion products to be treated and supplied to the treatment unit. These sensors also allow for the determination of the effectiveness of the treatment unit in the oxidation of carbon monoxide or the reduction of nitrogen oxides. For example, such sensors can allow for the identification of normal or abnormal wear and tear on the treatment unit, or abnormalities or drifts in the operation of the treatment unit.

[0024] Preferably, the regulating device is configured to trigger an alarm when the amount of carbon monoxide and / or nitrogen oxides contained in the combustion products downstream of the catalyst exceeds a predetermined threshold.

[0025] Preferably, the regulating device is configured to maintain the catalyst at a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C or even 300°C or 400°C when the amount of carbon monoxide and / or nitrogen oxides contained in the combustion products upstream of the catalyst is greater than a predetermined threshold.

[0026] In particular, if the amount of carbon monoxide and / or nitrogen oxides present in the combustion products to be treated is relatively low, especially compared to one or more defined thresholds, the treatment device can be configured not to adjust the temperature of the catalyst, which is especially to avoid any unnecessary energy consumption.

[0027] Preferably, the device includes means for adding fresh air to, for example, a gas or gaseous mixture supplied to a radiant or heating element and / or combustion products.

[0028] Preferably, the device further includes: means for adding fresh air, particularly configured to change the amount of fresh air present in the combustion products; and a control means configured to control the cost of the means for adding air.

[0029] The addition of fresh air can occur upstream of combustion, such as in the gas or gaseous mixture supplied to the radiant or heating element, or downstream of combustion, such as in the combustion products formed by the radiant or heating element. Therefore, the device for adding fresh air can be a controlled valve that alters the composition of the gas or gaseous mixture supplied to the radiant or heating element, or it can include a valve installed in an extraction pipe and / or a cooling air inlet in the device.

[0030] The device for adding fresh air can be controlled by a control device based on the temperature of the combustion products and / or the composition of the combustion products.

[0031] For example, the device may include: means for adding fresh air to a gas or gaseous mixture supplied to a radiant or heating element; and a control means that controls the amount of fresh air added to the gas supplied to the radiant or heating element based on the temperature or composition of the combustion products entering the oxidizing (and optionally reducing) catalyst.

[0032] Preferably, the apparatus further includes: means for adding fresh air to the gas supplied to the radiant or heating element; and a control means configured to reduce the amount of fresh air added to the gas supplied to the radiant or heating element when the amount of carbon monoxide contained in the combustion products upstream of the catalyst is below a predetermined threshold.

[0033] To ensure complete combustion, the amount of air supplied to the radiant or heating element is typically greater than the stoichiometric amount required for the combustion reaction. However, if the amount of carbon monoxide in the combustion products is low, this indicates that complete combustion is occurring: thus, as long as the amount of carbon monoxide in the combustion products remains low, the amount of fresh air supplied to the radiant or heating element can be reduced.

[0034] Preferably, the adjusting device includes the control device. Alternatively, the control device may include a manual control device.

[0035] Preferably, the regulating device is configured to regulate the temperature and / or composition of the combustion products entering the catalyst. For example, the regulating device may be configured to heat the combustion products, particularly without altering their composition. In other words, the combustion products are heated by the regulating device while retaining the same composition.

[0036] The equipment can also control the temperature of the catalyst via the combustion products being treated. This regulation is particularly advantageous during continuous operation of the equipment when the temperature of the combustion products being treated remains substantially constant over a period of time, and therefore can be changed at the regulated temperature required by the processing unit. By adjusting the temperature of the combustion products supplied to the processing unit to the temperature required for catalyst operation, it is possible to achieve the desired operation of the catalyst at substantially similar temperatures.

[0037] Preferably, the apparatus further includes means for determining the catalyst temperature, such as a temperature sensor installed upstream of the catalyst, for example in an extraction tube. The regulating device may include the means for determining the catalyst temperature.

[0038] Preferably, the apparatus further includes: means for adding fresh air to the combustion products and / or to the gas supplied to the radiant or heating element; a temperature sensor mounted upstream of the catalyst in an extraction tube; and a control means for controlling the amount of fresh air added to the combustion products and / or to the gas supplied to the radiant or heating element.

[0039] To control the temperature of the combustion products supplied to the catalyst, the device may include a temperature sensor installed upstream of the catalyst and means for adding fresh air to the device to reduce the temperature of the gas supplied to the catalyst. Therefore, the addition of fresh air can occur either within the combustion products supplied to the catalyst or within the gas supplied to radiant or heating elements.

[0040] Preferably, the device for adding fresh air includes a controlled valve mounted on the extraction tube and configured to adjust the amount of fresh air mixed with the combustion products.

[0041] Valve controls adjust the amount of fresh air added to the combustion products to change their temperature. The temperature of the combustion products is adjusted just before they enter the catalyst.

[0042] Preferably, the means for adding fresh air includes a cooling air inlet in the equipment, preferably located near a radiant or heating element.

[0043] Another possibility for altering the fresh air content of the combustion products and thus their temperature is to change the cooling air used in the equipment, particularly near radiant or heating elements. The amount of cooling air can also be adjusted to achieve the desired temperature of the combustion products entering the catalyst.

[0044] Preferably, the adjusting device includes the control device. Alternatively, the control device may include a manual control device.

[0045] Preferably, the catalyst comprises a honeycomb-shaped metal or ceramic support, at least a portion of which is coated with one or more noble metals and / or has a device for injecting a reducing agent (e.g., ammonia).

[0046] Carriers well known to those skilled in the art allow for the attainment of highly active surfaces for a given volume, which allows for greater yields.

[0047] Preferably, the equipment also includes means for unblocking the catalyst.

[0048] The unblocking device is designed to eliminate potential build-up of residues within the catalyst, which could block certain circulation channels of the gas being treated. To maintain catalyst efficiency, the unblocking device can be used periodically or when the pressure drop across the catalyst exceeds a predetermined threshold to restore its nominal performance.

[0049] Preferably, the device for clearing the catalyst is a device for circulating pressurized fluid (e.g., compressed air) through the catalyst.

[0050] To clear the catalyst, compressed air can be used. In particular, a sudden injection of compressed air into the inlet gas allows a sudden overpressure to be created at the catalyst inlet, which breaks up any build-up of residue and allows it to be expelled along with the remaining process gas. The catalyst is then obtained with the desired operating conditions. Attached Figure Description

[0051] Figure 1 A schematic diagram of a drying apparatus with a processing device according to the present invention is shown. Detailed Implementation

[0052] Figure 1 An example of a drying apparatus 1 according to the invention is schematically shown, the drying apparatus being used for the continuous drying of a moving web material 2. The web material 2 moves through the drying apparatus 1 in the direction indicated by arrow 4.

[0053] The exemplary drying device 1 preferably includes: a plurality of gas radiation emitters 6, which are supplied with a gas such as a premixture of gas and air, installed along the movement path of the web material 2; and a gas circulation flow system or mass transfer system 8, installed downstream of the emitters 6 along the movement direction of the web material 2, and configured to allow the airflow to circulate, for example, through natural convection or forced convection.

[0054] Traditionally, the airflow circulation system 8 includes a suction nozzle 10 and an extraction tube 12 for drawing hot air or combustion products from the moving web material 2. The extraction tube 12 is configured to discharge the drawn-in combustion products from the drying unit 1 and from one or more extraction tubes 16 via a central fan 14. Thus, the combustion products can be discharged outside, for example, via a chimney, into the atmosphere, but can also be at least partially recycled in another system. Therefore, as described below, the combustion products leaving the treatment unit can be redirected within the drying unit itself, for example, toward a heat exchanger, or toward another device, such as an air dryer.

[0055] The airflow circulation system 8 may also include a suction nozzle for drawing hot gas from the moving web material toward a suction conduit. The airflow circulation system 8 may also include a blow nozzle for blowing at least a portion of the hot gas, for example, drawn into a blow pipe in fluid communication with the suction pipe toward the moving web material, particularly via a fan. This suction nozzle (and optionally the blow nozzle), combined with corresponding pipes, allows for the recirculation of hot air present on the surface of the moving web material 2 during drying, thereby increasing the proportion of water vapor in the air before it is exhausted from the device 1.

[0056] To limit the impact of gases emitted from device 1, the device also includes a combustion product treatment device 18 installed on the extraction pipe 16, for example downstream of the central fan 14. The treatment device 18 is designed to specifically limit the content of carbon monoxide (and optionally nitrogen oxides) present in the combustion products emitted by device 1 before they are released into open air.

[0057] For this purpose, the processing device 18 may include an oxidation (and optionally a reduction) catalyst 20, mounted on the extraction tube 16, which allows carbon monoxide to react with an oxidizing compound (oxidant) (e.g., oxygen in the air) to convert carbon monoxide into carbon dioxide, and optionally allows nitrogen oxides to react with a reducing compound, such as ammonia or urea injected into the catalyst 20. Thus, the catalyst 20 can be conventionally positioned on a support having a highly active or contact surface. The presence of the catalyst 20 on the support surface allows reactions thereon to oxidize carbon monoxide to carbon dioxide and / or reduce nitrogen oxides to dinitrogen. The support may in particular be a metallic or ceramic support and has a honeycomb geometry. The catalyst itself may include an oxidation catalyst having a noble metal and / or a reduction catalyst, which is associated with a device for injecting a reducing agent (such as ammonia or urea). For example, the catalyst 20 may include a first portion having a reduction catalyst and a second portion having an oxidation catalyst, the first portion being associated with a device for injecting a reducing agent. Preferably, the catalyst includes a reduction catalyst, a portion of which is coated with a noble metal to oxidize carbon monoxide.

[0058] However, in order to allow the catalyst 20 to operate at high efficiency during the various stages of operation of the drying equipment 1, the processing apparatus 18 also includes a regulating device 22 for regulating the temperature of the catalyst 20. The regulating device 22 is configured to allow the catalyst 20 to operate within its nominal temperature range, for example, at a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C. Alternatively, or additionally, the regulating device 22 may be configured to allow the catalyst 20 to operate at a temperature greater than or equal to 300°C or even 400°C to improve its efficiency, or to achieve similar efficiency with a catalyst less rich in precious metals but operating at lower temperatures.

[0059] For this purpose, the regulating device 22 can be configured to allow rapid changes in the temperature of the catalyst 20 when the temperature of the catalyst is outside the nominal temperature range, and / or to allow the temperature of the catalyst 20 to be maintained when the temperature of the catalyst is within the nominal temperature range.

[0060] For example, the regulating device 22 may be configured to heat the catalyst 20 to a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C or even 300°C or 400°C, and / or to maintain the oxidation catalyst at a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C or even 300°C or 400°C.

[0061] Therefore, the regulating device 22 may include a heating element 24, such as electronic components and / or a heat exchanger, for example, installed within or in contact with the catalyst carrier 20, to heat the catalyst carrier when its temperature is too low (particularly during the start-up phase of the equipment 1). Thus, the heating element 24 is used temporarily to bring the catalyst into its nominal operating state until it can be held therein independently. Furthermore, the heat exchanger can advantageously be used to recover heat released elsewhere in the equipment and to provide that energy to the catalyst to heat it without increasing the equipment's energy consumption.

[0062] The regulating device 22 can also regulate the temperature of the combustion products supplied to the catalyst 20 so that the combustion products have a temperature that is within the range of the nominal temperature of the catalyst 20, so as to place or maintain the catalyst 20 within its nominal temperature range.

[0063] In order to change the temperature of the combustion products supplied to the catalyst 20 via the extraction tube 16, the regulating device 22 may include a control device 26 configured to add fresh air to the combustion products before the gas is burned by the emitter 6, or between combustion and extraction by the airflow circulation system 8, or after extraction by the airflow circulation system 8.

[0064] Therefore, the control device 26 can increase or decrease the amount of fresh air mixed with the gas supplied to the emitter 6 before combustion, thereby obtaining less or more thermal combustion products. Similarly, when the amount of carbon monoxide in the combustion products supplied to the processing device 18 is below a predetermined threshold, the control device 26 can also reduce the amount of fresh air supplied to the emitter 6 because combustion is already complete.

[0065] Alternatively, or additionally, control device 26 can increase or decrease the amount of fresh cooling air introduced into device 1 between gas emitter 6 and airflow circulation system 8. This cooling air mixes with the combustion products before they are drawn through airflow circulation system 8, allowing for a change in the temperature of the gas reaching catalyst 20 via extraction pipe 16.

[0066] Finally, as an alternative or additional provision to the above embodiments, the control device 26 may also be configured to add or not add fresh air to the combustion products at the extraction tube 16 supplied to the catalyst 20. For example, the processing device 18 may include a controlled valve 28 for adding fresh air, which is mounted on the extraction tube 16 upstream of the catalyst 20. The controlled valve 28 is connected to a fresh air inlet and, according to the control given by the control device 26, allows the addition or non-addition of fresh air, or the variation in the amount of fresh air added to the combustion products to change their temperature.

[0067] To determine the control of the controlled valves, or the control of the fresh air supply to emitter 6, or the control of the cooling device of device 1, processing device 18 may include one or more temperature sensors, one or more carbon monoxide sensors, and / or one or more nitrogen oxide sensors (not shown), installed at different locations on device 1, such as upstream, on, or downstream of catalyst 20, but also at extraction tube 16. Control device 26 can then determine control based on the information provided by this or these sensors.

[0068] The control device 26 can also, for example, directly control the power of the radiant or heating element 2 individually or globally. Therefore, the control device 26 can regulate the catalyst temperature by changing the power or number of the radiant or heating elements 6 operating in the device 1, or the distribution of the radiant or heating elements 6 operating in the device 1. Similarly, the frequency or circulation route of the airflow in the circulation system 8 can be changed by the control device to obtain the temperature required for the combustion products entering the catalyst 20.

[0069] Finally, and to limit the blockage of catalyst 20 (particularly the blockage of the carrier channels), the treatment device 18 may include a clearing device 30. The clearing device 30 may be, for example, a device for circulating pressurized fluid (e.g., compressed air) through the catalyst and is installed upstream or downstream of catalyst 20. By creating a significant pressure difference between the inlet and outlet of catalyst 20, the clearing device 30 can then reduce or break up any blockages that may form in the carrier channels and discharge them to the outside of catalyst 20.

[0070] The use of the unblocking device 30 can be controlled, in particular, based on the operating time of the catalyst 20, for example, by providing an unblocking procedure every 20, 30, or 50 hours of operation of the catalyst 20. Alternatively, the unblocking device 30 can be controlled based on the evolution of the pressure drop between the inlet and outlet of the catalyst 20, for example, when such pressure drop exceeds a predetermined threshold or when a predetermined value is added for a predetermined time.

[0071] Therefore, thanks to the present invention, combustion products emitted from a drying device for moving web materials can be treated effectively and for extended periods. In particular, the treatment unit is configured to operate within its nominal range for the longest possible time, including during short-term cycles, especially during startup. Similarly, long-term operation is ensured by a clearing device that allows for the retention of catalyst capacity for treating combustion products along the extraction tube route.

Claims

1. A drying apparatus (1) intended for the continuous drying of moving web material (2), said apparatus (1) comprising: - A radiation or heating element (6) that causes the gas or gaseous mixture to burn. - An airflow circulation system (8) configured to draw in combustion products generated by the radiation or heating element (6). The airflow circulation system (8) further includes an extraction tube (16) configured to discharge at least a portion of the combustion products drawn in by the airflow circulation system (8) from the device. The device (1) is characterized in that it further includes a processing device (18) for processing the combustion products, which are carbon monoxide and optionally nitrogen oxides. The processing device (18) includes an oxidation catalyst (20) for oxidizing carbon monoxide and is installed on or downstream of the extraction tube (16) to process the carbon monoxide contained in the combustion products. The device (1) also includes a regulating device (22) configured to regulate the temperature of the catalyst to a temperature greater than or equal to 130°C. The device (1) includes: means for adding fresh air to the gas or gaseous mixture supplied to the radiant or heating element (6); and a control device (26) that controls the amount of fresh air added to the gas or gaseous mixture supplied to the radiant or heating element based on the temperature of the combustion products entering the oxidation catalyst.

2. The device (1) according to claim 1, wherein, The regulating device (22) is configured to heat the catalyst (20) to a temperature greater than or equal to 130°C, and / or the regulating device (22) is configured to maintain the catalyst (20) at a temperature greater than or equal to 130°C.

3. The device (1) according to claim 1, wherein, The regulating device (22) includes a heating element (24) configured to provide heat to the catalyst (20).

4. The device (1) according to claim 1, wherein, The regulating device (22) includes at least one carbon monoxide sensor, which is installed upstream and / or downstream of the catalyst (20) and configured to measure the amount of carbon monoxide contained in the combustion products upstream and / or downstream of the catalyst (20).

5. The device (1) according to claim 4, wherein, The regulating device (22) is configured to maintain the catalyst (20) at a temperature greater than or equal to 130°C when the amount of carbon monoxide contained in the combustion products upstream of the catalyst (20) is greater than a predetermined threshold.

6. The device (1) according to claim 4, wherein the control device (26) is configured to reduce the amount of fresh air added to the gas or gaseous mixture supplied to the radiant or heating element (6) when the amount of carbon monoxide contained in the combustion products upstream of the catalyst (20) is below a defined threshold.

7. The device (1) according to claim 1, wherein, The regulating device (22) is configured to regulate the temperature of the combustion products entering the catalyst (20).

8. The device (1) according to claim 7, wherein the regulating device (22) includes a temperature sensor installed in the extraction tube (16) and located upstream of the catalyst (20), and wherein the control device (26) controls the means for adding fresh air based on the temperature provided by the temperature sensor.

9. The device (1) according to claim 8, wherein, The device for adding fresh air includes a controlled valve (28) mounted on the extraction tube (16) and configured to adjust the amount of fresh air mixed with the combustion products.

10. The device (1) according to claim 8, wherein, The device for adding fresh air includes a cooling air inlet in the device.

11. The device (1) according to claim 1, wherein, The catalyst (20) comprises a honeycomb metal or ceramic support, at least a portion of which is coated with one or more noble metals.

12. The device (1) according to claim 1, further comprising means for unblocking the catalyst (20).

13. The device (1) according to claim 12, wherein, The device for clearing the catalyst (20) is a device for circulating pressurized fluid through the catalyst (20).

14. The device (1) according to claim 1, wherein, The catalyst (20) is also a reduction catalyst, which is configured to reduce the nitrogen oxides of the combustion products.

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