EP1131826A2 - Recombineur pour eliminer efficacement l'eau provenant d'atmospheres polluees suite a un accident - Google Patents

Recombineur pour eliminer efficacement l'eau provenant d'atmospheres polluees suite a un accident

Info

Publication number
EP1131826A2
EP1131826A2 EP99963296A EP99963296A EP1131826A2 EP 1131826 A2 EP1131826 A2 EP 1131826A2 EP 99963296 A EP99963296 A EP 99963296A EP 99963296 A EP99963296 A EP 99963296A EP 1131826 A2 EP1131826 A2 EP 1131826A2
Authority
EP
European Patent Office
Prior art keywords
housing
recombiner
catalyst
recombiner according
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99963296A
Other languages
German (de)
English (en)
Inventor
Peter BRÖCKERHOFF
Werner Von Lensa
Ernst Arndt Reinecke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Forschungszentrum Juelich GmbH filed Critical Forschungszentrum Juelich GmbH
Publication of EP1131826A2 publication Critical patent/EP1131826A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/0242—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid flow within the bed being predominantly vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/248—Reactors comprising multiple separated flow channels
    • B01J19/249—Plate-type reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
    • B01J8/0446—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical
    • B01J8/0476—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more otherwise shaped beds
    • B01J8/048—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more otherwise shaped beds the beds being superimposed one above the other
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/28—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core
    • G21C19/30—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core with continuous purification of circulating fluent material, e.g. by extraction of fission products deterioration or corrosion products, impurities, e.g. by cold traps
    • G21C19/317—Recombination devices for radiolytic dissociation products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00245—Avoiding undesirable reactions or side-effects
    • B01J2219/00259—Preventing runaway of the chemical reaction
    • B01J2219/00263—Preventing explosion of the chemical mixture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the invention relates to devices with which released or interference-generated hydrogen f from non-inertized rooms, for.
  • B. Safety containers of pressure and non-inertized boiling water reactors, which in addition to hydrogen also contain water vapor, air, aerosols and other gases, can be effectively removed without reignition.
  • the hydrogen can be present in the presence of atmospheric oxygen, e.g. B. by means of catalytic processes, recombined to water vapor within the device.
  • Preventive safety precautions consist in inerting the gas volumes with nitrogen, as has already been done in the case of boiling water reactors.
  • Other countermeasures that have already been implemented are catalytic recombinerators. With the aid of them, the hydrogen produced is catalytically recombined both inside and outside the ignition limits, ie. H. converted into water vapor while generating heat. Hydrogen contents with concentrations within the ignition limits can also be burned off conventionally after spark ignition. However, the processes that occur are not controllable, so that the above-mentioned reactions which could endanger the system may occur.
  • Both thermal and catalytic recombiners have been developed to remove the hydrogen generated during normal operation and in the event of an accident, which recombine the hydrogen with the oxygen in the air in water vapor. Preference is given to catalytic systems that work passively, ie self-starting and without external energy supply, so that availability is guaranteed during an accident. is steady.
  • There are two types of recombiner both metallic plates or foils and highly porous granules, to which platinum or palladium is applied as a catalyst, being used as substrates.
  • Several foils and granule packages - the granules are held together by wire nets to form flat packages - are arranged vertically and parallel to each other in one housing. The hydrogen / air mixture enters the bottom of the housing and the reaction begins on the catalytically coated surfaces. However, the mixture or the reaction products only flow over the surfaces of the foils or the granulate packs as a result of the thermal buoyancy that arises.
  • Another disadvantage is the fact that targeted premixing is not possible before entering the recombiners.
  • the reactants oxygen and hydrogen are fed to the recombiners as they arise or exist locally.
  • the maximum degradation rates or thermal outputs of existing systems are limited due to the overflow of the surfaces and the associated wrestle cross exchange.
  • the possibility of storing heat is low.
  • the available systems provide the entry of the mixture containing the hydrogen on the underside. Due to the reaction on the catalytically active surfaces, there is a buoyancy, so that the depleted mixture emerges at the top. To increase the buoyancy, narrowing of the outer housing is therefore provided in the prior art.
  • Another variant of the prior art has a constant cross section over the entire height. In the upper area, however, the mixture is deflected by 90 °. It leaves the housing through an outlet grille.
  • the technical problem of the present invention is therefore to control both small and large amounts of hydrogen with the atmospheric oxygen present in the containment containers in a controlled and efficient manner in a wide concentration range.
  • a recombiner for removing hydrogen from hazardous atmospheres with a housing which specifies a longitudinal direction for a flow and has at least one opening at both ends in the longitudinal direction and with at least one catalyst element which is arranged in the housing , solved, wherein the at least one catalyst element is modular and is filled with a porous substrate which is coated with a catalyst material, and wherein the at least one catalyst element essentially completely fills the cross section of the housing.
  • the efficiency of the recombiner can be decisively improved by the fact that the gas mixture of the accident atmosphere flowing through the recombiner not only flows past the surfaces of the catalyst elements, but also has to flow through the catalyst elements, so that as large a proportion as possible of the catalyst elements acting surfaces within the catalyst module is flowed over by the gas mixture. Higher conversion rates are thus achieved, so that the gas mixture emerging from the recombiner is sufficiently emaciated to efficiently avoid uncontrolled combustion of the gas mixture outside the recombiner. It is therefore achieved by the present invention that the hydrogen in the containment of a pressurized water reactor is catalytically layered surfaces is implemented in a controlled manner, the risk of ignition of the hydrogen-rich mixture being largely avoided. In addition, the removal of the hydrogen is so effective that the high hydrogen concentrations which may be present at the beginning of the accident are quickly reduced to concentrations below the lower ignition limit and the risk of the explosion of large amounts of hydrogen can thus be avoided with certainty.
  • At least two catalytic converter modules are preferably provided, which are arranged next to one another and / or one above the other in the housing. At least one free flow channel can be provided between two catalyst modules arranged next to one another. Furthermore, at least one intermediate space is preferably provided between two catalyst modules arranged one above the other or two layers of several catalyst modules arranged one above the other, the catalyst modules being arranged symmetrically or asymmetrically in the housing. This variable arrangement of the catalyst modules, which is possible in the first place due to the modular properties of the catalyst elements, ensures that in addition to the flow through the catalyst modules, a free flow of the gas mixture through the recombiner is also possible. The free cross-section in the layers in which catalyst modules are arranged only makes up a small part of the total cross-section.
  • plates or foils are provided which subdivide the housing of the recombiner in the longitudinal direction into flow channels, the flow channels being at least partially filled with catalyst modules.
  • further surfaces are provided in the housing of the recombiner that are coated with a catalytic material.
  • the formation of the flow channels serves to evenly form the flow distribution of the gas mixture through the recombiner.
  • the additional surfaces of the plates and foils serve to absorb the heat generated by the recombination also within the recombiner and to dissipate it either to the openings of the housing arranged in the longitudinal direction or to the housing itself.
  • the porous catalytic substrate which is contained in the catalyst modules is preferably in the form of granules or as an arrangement of nets, strips and / or expanded metals. A combination of granules and an arrangement of nets, strips and / or expanded metals is also possible.
  • the most uniform possible distribution of the catalytically active surface of the porous substrate is achieved.
  • the flow resistance is set by the distribution of the catalytic substrate within the catalyst module in such a way that the flows of the gas mixture predetermined by the flow conditions in the containment are not prevented by the recombiner.
  • the natural train through the The recombiner must therefore be sufficient to ensure a flow through the recombiner. Therefore, the flow resistance, which is built up by the catalyst modules within the housing of the recombiner, must not exceed an upper threshold.
  • the plates or foils already arranged in the housing serve for this purpose.
  • a combination of a coated, catalytically active substrate and an uncoated, non-catalytically active substrate can also be provided for this purpose in a catalyst module.
  • the hydrogen is then reacted on the catalytically active substrate with the liberation of heat, the uncoated substrates being able to absorb the thermal energy and, if appropriate, to pass it on.
  • the uncoated, non-catalytically active substrates are preferably in heat-conducting contact with external structures.
  • the modular structure of the catalytic converter elements of the present invention is reinforced in particular by the design of the catalytic converter module with a housing which is open at least on two sides in order to allow a flow through the catalytic converter module.
  • the housing creates easily manageable units or modules, on the other hand, through a suitable arrangement of the catalyst modules with their housings, free flow channels can be formed in the housing of the recombiner.
  • the size and shape of the catalyst modules can be very easily adapted to the relevant circumstances due to the design with a housing.
  • the housing of the catalyst module is preferably completely filled with catalytic substrate, while in a further embodiment at least in the housing a flow channel is formed which is not filled with catalytic substrate.
  • the housing of a catalyst module can also have plates or foils which subdivide the housing of the catalyst module in the longitudinal direction into flow channels. These flow channels are then at least partially filled with catalytic substrate.
  • the plates and foils serve to improve the flow and possibly better dissipate the heat generated by the recombination.
  • the housing of the recombiner is preferably designed such that it has an essentially identical cross section over the entire length. Therefore, there are no cross-sectional changes that would flow through the recombiner in one of the two directions.
  • a calming and mixing zone is preferably provided on at least one of the two open ends within the housing of the recombiner before the inflowing gas mixture reaches the first catalyst module or the first layer of catalyst modules. The result is a more efficient and more even conversion of the hydrogen.
  • the plates and foils arranged in the interior of the housing of the recombiner divide the calming and mixing zone into partial volumes. This serves to ensure that the entering gas mixture calmed more and can be aligned to the catalyst modules. On the other hand, the division of the volume ensures that the size of the partial volumes is so small that any ignition of the gas mixture which may occur when it emerges from the recombiner is prevented, since the free distances between the plates and foils are smaller than the size of the Detonation cells are.
  • Ignition of the gas mixture in the area of the calming and mixing zone upon entry and exit of the gas mixture is further prevented by the plates or foils being at least partially uncoated. This prevents further recombination and heating of the recombiner in the inlet and outlet area of the housing, and the uncoated areas can absorb and dissipate the heat present in the gas mixture.
  • the cooling devices which are preferably arranged on at least one of the two open ends of the housing and which cool the incoming or outgoing gas mixture sufficiently to avoid exceeding the ignition temperature within the hydrogen-containing gas mixture, serve the same purpose.
  • cooling devices are arranged in a more preferred manner within the housing of the recombiner in the volumes left free by the catalyst modules. These can be the free flow channels or the spaces between two catalyst modules or layers of catalyst modules arranged one above the other.
  • the cooling devices are designed in particular in the form of radiation sheets or in the form of cooling tubes through which coolants flow.
  • non-return locks which on at least one of the Both open ends of the housing are provided.
  • the non-return valves have openings with a size that allow the gas mixtures to enter and exit. Due to the heat dissipation by means of these barriers, however, the passage of the flame is prevented.
  • FIG. 1 shows a safety container of a reactor system in a schematic representation, with recombiners from the prior art being shown in the right half and an inventive recombiner in the left half,
  • FIG. 2 shows a first exemplary embodiment of a recombiner according to the invention
  • Fig. 6 different configurations of the catalyst modules in cross section.
  • FIG. 1 schematically represents a safety container of a reactor system. It shows the flow processes within the containment during an accident by way of example.
  • two recombiners 4a and 4b known from the prior art are likewise indicated schematically and by way of example, which are generally attached to the walls according to the prior art. They consist of a housing 10 'and catalytically active elements 11' which, in the case of the recombiner 4a, consist of plates or foils and in the case of the recombiner 4b, consist of granule packs.
  • a recombiner 6 likewise consisting of housing 10 and catalyst modules 11, is shown, in which the inflow is possible both from above and from below.
  • the cross section of the housing 10 is the same over the entire height.
  • the catalytic catalyst modules 11 are arranged symmetrically or asymmetrically in the housing, so that internal circulations can also be generated in this way.
  • Coolers 7 are arranged at the inlet and outlet to absorb the heat of reaction or to cool the atmosphere. The heat absorbed by the coolers 7 is released through risers 8 to higher water basins. The cooled water flows back through the lines 9 into the cooler 7.
  • Catalytic catalyst modules 11 are arranged next to one another and one above the other in a housing 10.
  • a continuous flow channel 13 is provided, which enables a flow in both directions.
  • the amount of heat released in a catalyst module 11 is either dissipated convectively from the other gases, as shown by the arrow 21, or dissipated through the recombiner wall 10 to the outer containment atmosphere 22 or to the atmosphere 23 flowing through the middle flow channel 13. This prevents additional heating and possibly overheating of the subsequent catalyst modules 11.
  • check valves 12 at the inlet and outlet which are intended to prevent the flame from spreading into the containment when the mixture is ignited.
  • These barriers can be designed as nets, expanded metals or grids for dissipating the heat, the free distances between the wires, webs or bars are smaller than detonation cells. This means that they can also prevent detonations from escaping.
  • 3a and 3b show two exemplary embodiments of the recombiner 6 described above, which show in cross section the outer wall 10, catalyst modules 11 and a flow channel 13 for cooling, which is shown here as a single and central channel. However, further, not symmetrically arranged flow channels are also conceivable, which support the formation of internal circulation flows in the case of a downward flow.
  • the representations of the cross sections in Fig. 3 shows that the catalyst modules 11 are modular and on the other hand essentially fill the cross section of the housing 10, wherein only one flow channel 13 is formed, which only a small part of the cross section of the housing 10 occupies.
  • the catalyst modules 11 show in FIGS. 3a and 3b as porous substrates arrangements of granules on the left and nets or expanded metals on the right. Numerous modifications are possible for both, e.g. B. size (edge length, diameter, effective heights), materials (ceramic, metal), grain or wire diameter (granulate shape, porosity), arrangement of the individual layers to each other (rotation), layer thicknesses and catalyst materials and amounts. Combinations of nets and granules are also provided and have advantageous effects.
  • the amount of the porous substrate is dimensioned so that there is no excessive pressure loss when flowing through the porous substrate, which prevents a flow due to natural draft.
  • FIG. 4a shows a longitudinal section through a recombiner 6 modified in comparison to FIG. 2.
  • plates or foils 24 are arranged in parallel in the housing 10.
  • the catalyst modules 11 are arranged in the longitudinal direction in the middle of the housing.
  • the different flow channels can be seen in the cross section shown in FIG. 4b.
  • the previously described networks, expanded metals or granules come into consideration as catalytically active material.
  • FIG. 4b it can also be seen that the catalyst modules 11 completely fill the cross section of the housing 10.
  • the plates or foils 24 can be coated over the entire length or only in sections with catalyst materials. The turnover is only in sectors. In the subsequent uncoated section, heat is stored and dissipated. This leads to cooling of the mixture flowing past and thus overheating in the next coated section is avoided. Another possibility is to use short plates or foils which are coated on one or both sides and between which there are empty spaces. The gas can mix and cool in the empty spaces between adjacent plate or film sections.
  • 5a to c show three exemplary embodiments of the previously described recombiner 6.
  • 5a shows a plurality of catalyst modules 11 lying next to one another, which are separated from one another by plates 24 and substantially completely fill the cross section of the housing 10. Between the individual catalyst modules 11 one above the other there are intermediate spaces 14 for swirling, mixing and cooling the atmosphere.
  • FIG. 5 b individual zones lying one above the other and next to one another are not filled with porous substrate, so that they act as flow channels 13 and are freely flowed through and can contribute to cooling the catalyst modules 11.
  • the width of the catalyst modules 11 and the free zones is dimensioned such that the buoyancy in the reaction zones does not completely hinder a downward flow through the free zones, the catalyst modules 11 of each layer essentially completely filling the cross section of the housing 10.
  • the embodiment shown in FIG. 5c alternately provides catalyst modules 11 and free flow channels 13 in each layer, in which the hydrogen-containing mixture is either converted or used for cooling.
  • catalyst modules 11 and flow channels 13 are arranged offset from the previous position.
  • calming and mixing zones are also provided in the intermediate spaces 14 between the individual modules 11.
  • FIG. 6 shows the arrangement of possible individual catalyst modules in a recombiner housing 10.
  • Each catalyst module 11 has a separate housing 33.
  • This arrangement offers the advantage that a hydrogen-rich containment atmosphere can flow in the free spaces between the housings 33 of the individual catalyst modules and between the housings 33 of the catalyst modules and the recombiner wall 10 and can dissipate part of the heat of reaction generated in the catalyst modules 11.
  • the number and arrangement of the catalyst modules 11 are adapted to the circumstances, the catalyst modules 11 of a layer of catalyst modules 11 each having the cross section of the housing 10 essentially completely fill and the free spaces make up only a small part of the cross section.
  • the catalyst module 25 has either nets or granules, both coated with catalyst material.
  • a flow channel 34 is additionally provided for cooling the catalyst module 26.
  • the cross section is divided into smaller channels by means of inserted plates or foils 35, the cross sections of which are each filled with networks of the same or different wire diameters or mesh sizes.
  • both sides of the plates or foils 35 for hydrogen recombination are also coated with catalyst material at the edges of the individual cross sections.
  • the catalytic converter module 29 provides free flow channels 36, the cross sections of which are not filled with nets, for heat dissipation. This creates zones in which free convection can form and contribute to cooling. These zones make up only a small part of the total cross-section.
  • the plates or foils 35 are coated only on the sides that are in contact with the catalyst elements.
  • porous granules are provided in all cross sections. Material, porosity and catalyst coating can be the same or vary in all channels. In the catalyst module 31, both sides of the plates or foils 35 are coated. The channels are filled with granules as before.
  • the catalyst module 32 again provides free flow channels 36 to create convection zones and thus heat dissipation.
  • the porous granules in the catalyst elements can be the same or have different porosities.
  • the plates or foils 35 are coated on one side only.
  • FIG. 6 The symmetrical arrangement of the catalyst modules in the recombiner housing 10 is shown in FIG. 6. Also in FIGS. 5a and 5b, the asymmetrical position of one or more catalytic converter modules 11 in the housing 10 is also the case when the hydrogen-rich mixture flows downwards through the free gaps or through the catalytic converter modules 11 itself due to the pressure differences between the free cross sections and channels filled with porous catalytic converter elements Modules that lead to the cross exchange of the mixture strands, an internal circulation with upward flow through the catalyst module and thus a starting of the reaction possible.
  • the recombiners shown can be operated with upstream and downstream coolers 7, as shown in FIG. 1. Combinations with self-starting turbocompressor units are also conceivable, so that the flow is forced and their catalytic effectiveness is increased due to higher flow velocities and thus also higher heat and mass transfer coefficients. In this case, the recombiners no longer have to be arranged vertically. Your inclination to the vertical axis can be arbitrary. Reference numeral e

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Fluid Mechanics (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

L'invention concerne un recombineur permettant d'éliminer l'eau provenant d'atmosphères polluées suite à un accident, qui comprend un boîtier (10) spécifiant un sens longitudinal pour l'écoulementt qui présente aux deux extrémités, dans le sens longitudinal dans chaque cas au moins une ouverture. Ce recombineur comprend également au moins un élément catalyseur (11) placé dans le boîtier (10). L'invention vise à résoudre le problème technique que pose la réaction contrôlée et efficace dans une large plage de concentration, aussi bien de petites que de grandes quantités d'hydrogène avec l'oxygène atmosphérique présent dans les enceintes de confinement. A cet effet, au moins un élément catalyseur (11) se présente sous forme modulaire et est rempli d'un substrat poreux, recouvert d'un matériau catalyseur. L'élément catalyseur (11) remplit au moins en partie la section transversale du boîtier (10).
EP99963296A 1998-11-17 1999-11-12 Recombineur pour eliminer efficacement l'eau provenant d'atmospheres polluees suite a un accident Withdrawn EP1131826A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19852954 1998-11-17
DE19852954A DE19852954A1 (de) 1998-11-17 1998-11-17 Rekombinator zum effektiven Beseitigen von Wasserstoff aus Störfallatmosphären
PCT/EP1999/008733 WO2000030122A2 (fr) 1998-11-17 1999-11-12 Recombineur pour eliminer efficacement l'eau provenant d'atmospheres polluees suite a un accident

Publications (1)

Publication Number Publication Date
EP1131826A2 true EP1131826A2 (fr) 2001-09-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99963296A Withdrawn EP1131826A2 (fr) 1998-11-17 1999-11-12 Recombineur pour eliminer efficacement l'eau provenant d'atmospheres polluees suite a un accident

Country Status (3)

Country Link
EP (1) EP1131826A2 (fr)
DE (1) DE19852954A1 (fr)
WO (1) WO2000030122A2 (fr)

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DE19852953C1 (de) * 1998-11-17 2000-03-30 Forschungszentrum Juelich Gmbh Katalysatorelement für einen Rekombinator zum effektiven Beseitigen von Wasserstoff aus Störfallatmosphären
DE10042250C1 (de) * 2000-08-29 2002-04-04 Forschungszentrum Juelich Gmbh Rekombinator mit stabilisierter Reaktionstemperatur
DE102005061985A1 (de) 2005-12-23 2007-07-05 Forschungszentrum Jülich GmbH Katalysator für die Rekombination von Wasserstoff mit Sauerstoff
US10839966B2 (en) * 2017-05-10 2020-11-17 Westinghouse Electric Company Llc Vortex driven passive hydrogen recombiner and igniter
FR3118589A1 (fr) * 2021-01-07 2022-07-08 Soletanche Freyssinet Recombineur catalytique de dihydrogène

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WO2000030122A3 (fr) 2000-11-02
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