CN102039089A - Metal foam matrix filter system for removing hydrocarbons from exhaust air and method thereof - Google Patents

Metal foam matrix filter system for removing hydrocarbons from exhaust air and method thereof Download PDF

Info

Publication number
CN102039089A
CN102039089A CN2010105161571A CN201010516157A CN102039089A CN 102039089 A CN102039089 A CN 102039089A CN 2010105161571 A CN2010105161571 A CN 2010105161571A CN 201010516157 A CN201010516157 A CN 201010516157A CN 102039089 A CN102039089 A CN 102039089A
Authority
CN
China
Prior art keywords
metal foam
hydrocarbon
foam element
filter system
zeolite layer
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.)
Pending
Application number
CN2010105161571A
Other languages
Chinese (zh)
Inventor
S·弗罗利希
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.)
Alantum GmbH and Co KG
Alantum Europe GmbH
Original Assignee
Alantum GmbH and Co KG
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 Alantum GmbH and Co KG filed Critical Alantum GmbH and Co KG
Publication of CN102039089A publication Critical patent/CN102039089A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/864—Removing carbon monoxide or hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0226—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being fibrous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/22—Metal foam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
    • F01N2370/04—Zeolitic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/063—Surface coverings for exhaust purification, e.g. catalytic reaction zeolites
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1606—Particle filter loading or soot amount
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Toxicology (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

The present invention relates to a metal foam matrix filter system for removing hydrocarbons from exhaust air and a method thereof. The filter system is provided with a metal foam component (1) and a heating device (2). The heating device (2) is designed for heating the metal foam component (1). The metal foam comprises at least one element which is taken as an alloy component and is used as an oxidation catalyst of hydrocarbon. A zeolite layer (1a) is coated on the metal foam component (1) behind the metal foam component (1) in a flowing direction. The invention also relates to a method for using the filter system.

Description

From waste gas, remove the metal foam base filter system and the method for hydrocarbon
Technical field
The present invention relates to be used for removing the filter system and the method for hydrocarbon from waste gas.
Background technology
When for example handle as solvent comprise the paint of volatile hydrocarbon the time (but being not limited thereto), can produce hydrocarbon-contained waste gas.Because hydrocarbon is considered to a kind of in the harmful product, therefore there is more and more stricter legal supervision, thereby makes that filter system is forced to for example be used for painting the room so that remove hydrocarbon from the waste gas from this room.
For example, there is the possibility of filtering by active carbon filter.Yet because the deposition degree can descend when the load of filter increases, therefore this active carbon filter must be changed termly.
Another kind of possibility is to use the hot waste gas clean unit.In this system, second-time burning can take place in the hydrocarbon in the waste gas.Yet the hot waste gas purifier has the big shortcoming of expense aspect energy and the cost.
Summary of the invention
Therefore a target of the present invention is the improved filter system and method that is provided for removing hydrocarbon from waste gas.
This target realizes by filter system according to claim 1 and method according to claim 9.Preferred embodiment provides in the dependent claims.
According to embodiments of the invention, be used for having the metal foam element from the filter system of waste gas removal hydrocarbon, wherein metal foam comprises at least a element that is used as the oxidation catalyst of hydrocarbon as alloy compositions.In addition, there is the heater that is designed for the heating of metal foam element.
As everyone knows, perforate or the closed-cell foam of metal foam for making by metal material.The preferred open cell metallic foam that uses in framework of the present invention.Because porous, can obtain big surface area and interact with the hydrocarbon that is included in waste gas being used for.
Heater is used for the heating of metal foam element with purge hydrocarbon waste gas.By this way, the metal foam element is risen to the temperature that the gained catalytic elements can play a role best.
Can have adjuster, it is designed for the adjusting heater, makes the metal foam element remain on the reference temperature T that presets SUsually this adjuster that has temperature sensor, control element and manually or automatically import the input element of reference temperature is known for the technical staff in the Control Engineering field, thereby will explain in more detail herein.The metal foam element is remained under the optimum working temperature consistently, and needn't carry out manual adjustments or monitoring.
With regard to heater, can thereby use different suitable heaters.Example comprises resistive heating system or induction heating apparatus.With regard to resistance heated, use the resistance of metal foam element to heat.Voltage is applied to metal foam, and consequent electric current heats this element.With regard to eddy-current heating, well-known, in electric conductor, produce eddy current by mM disodium hydrogen phosphate, flowing of eddy current can be heated this electric conductor (being metal foam in the case) again.In described heating possibility, do not use naked light.
Yet according to replacement scheme, heater also can form burner, and this burner produces naked light and comes the heating of metal foam element.Different with possibility mentioned above, this heating type does not comprise the electric current that flows through the metal foam element.
Not relying on is the selected specific embodiment of heater, and the thermal conductive resin that constitutes the metal of metal foam element guarantees that this element intensification is quick and even, thereby makes and can heat under the situation of minimal energy consumption.
Owing to be included in the metal foam as alloying element as the element of catalyst, therefore will coating be coated on the metal foam.Yet according to a particular embodiment of the invention, the metal foam element has the zeolite coating.Zeolite can detention greater than all molecules in its aperture.Therefore, they carry out the mechanical grading function of using among the described embodiment.
Described embodiment used in two stages: in the phase I, the metal foam element heats.In this phase I, the zeolite coating absorbs hydrocarbon and stores them.Thereby at this stage generation mechanical grading.When the absorbability of zeolite coating exhaust and thereby do not have or the hydrocarbon of minute quantity can be when machinery sifts out further, with the metal foam element with and go up the zeolite coating that applies and in second stage, heat.In this second stage, the catalytic effect that is included in the catalyst in the alloy is activated, thereby makes hydrocarbon obtain catalytic oxidation further in the metal foam of metal foam system.
In this embodiment, the regeneration of the heat of filter system needs few relatively energy consumption, because because there is relative lot of energy in the burning that the storage of hydrocarbon and hydrocarbon carry out in the mode of controlling oneself afterwards in exothermic ignition (passing through catalyst).
Zeolite layer is applied on the hole pattern of foam and can be applicable to corresponding use by their absolute mass.The thickness d of zeolite layer is preferably between about 10 μ m and about 500 μ m.In stage, this thickness is enough to detention volatile hydrocarbon reliably at first mechanical filter.
In addition, with regard to metal foam system with zeolite coating, can there be measurement mechanism and microprocessor, described measurement mechanism is used for measuring the amount of the hydrocarbon that is included in zeolite layer, described microprocessor be designed to the maximum of absorbable hydrocarbon in zeolite layer and the amount that is included in the hydrocarbon in the zeolite layer that records by measurement mechanism between form difference and when this difference less than the first threshold S that presets 1The time activate heater.
In other words, microprocessor calculates hydrocarbon absorbability still available in the zeolite layer and works as this still available hydrocarbon absorbability and reduce to the first threshold S that presets 1Under the time activate heater.In case heater has been activated and pass heat time heating time, the further catalytic oxidation of hydrocarbon will take place in metal foam then, as indicated above.
According to another embodiment, also microprocessor Design can be used for working as difference mentioned above greater than the second threshold value S 2The time (S wherein 2＞S 1) heater is stopped using.In other words, when having guaranteed the sufficiently high absorbability of zeolite filtration device once more, microprocessor cuts out heater.
Threshold value S 1With threshold value S 2All can preferably manually change by the operator.Thereby the operator of filter system can determine the size that it wants the absorbability of the zeolite filtration device that utilizes.
Except above-mentioned feature, the metal foam element also can be coated with the carrier coating that comprises the catalytic material that is used for the hydrocarbon burning.The catalytic material can be for example platinum or palladium.As everyone knows, carrier coating is metal oxide (for example aluminium oxide) layer that comprises catalyst material.Carrier coating can during preparation for example be coated on the foam as the powder water slurry, carries out dry tack free then, and utilizes active metal component (for example platinum or palladium) to flood subsequently, wherein activates by final roasting and is undertaken.Carrier coating can be coated in zeolite layer below.
According to embodiment, be used for comprising following method step from the method for waste gas removal hydrocarbon:
-make waste gas comprise the metal foam element and be used for passing on the filter system of heater of heating of metal foam element, wherein metal foam comprises the element as at least a oxidation catalyst as hydrocarbon of alloy compositions; And
-come the heating of metal foam element by heater.
Different embodiment according to filter system mentioned above, heating steps carries out at different time: if there is not zeolite layer on the metal foam element, should guarantee that so the metal foam element had obtained heating before waste gas is by filter system, promptly risen to optimum working temperature.The further heating of duration of work only is used to keep this optimum working temperature T SThe temperature of optimum working temperature (or approach).Under the situation that has the zeolite coating, just heat during the stage up to second method, that is, when wishing to carry out second filtration stage, the height operator just heats to such an extent as to spend when the loading of zeolite filtration device, this means the further catalytic oxidation of hydrocarbon.
The step of heating of metal foam element can for example be utilized resistance heated, eddy-current heating or be undertaken by flame heat.Certainly, NM herein but heating means other types known to those skilled in the art also are fine.
If the metal foam element is the element that is coated with zeolite layer, this method can comprise in addition and measures this step of amount be included in the hydrocarbon in the zeolite layer so, wherein only the difference between the maximum of absorbable hydrocarbon in the zeolite layer and the amount that is included in the hydrocarbon in the zeolite layer that records less than the first threshold S that presets 1The time just carry out the step of heating of metal foam element.As already mentioned above, can for example use microprocessor to form this difference.The action that makes the hydrocarbon that filters by zeolite layer carry out further catalytic oxidation can thereby be able to automatic startup.
According to embodiment, when this difference greater than the second threshold value S that presets 2(S wherein 2＞S 1) time, finish the heating of metal foam element or the metal foam element is remained on preset temperature T SStep.This has produced the possibility that allows whole filter process to carry out automatically under the situation of without operator intervention.
Description of drawings
Other feature and advantage will see following with reference in the described specific embodiment of accompanying drawing.Accompanying drawing shows exemplary embodiment of the present invention with non-limiting way.
Fig. 1 shows the schematic cross sectional views of filter system according to an embodiment of the invention;
Fig. 2 a and 2b show the schematic circuit diagram according to two embodiment of filter system of the present invention respectively.
The specific embodiment
As in Fig. 1 as seen, be used for comprising the metal foam element 1 that constitutes by foam porous metal or foam porous metal alloy from the filter system that waste gas is removed hydrocarbon and be can be used for for example purifying the waste gas the japanning room etc.Although the hole is represented by sealing ring in the drawings, those of skill in the art are clear that metal foam element 1 must comprise at least some perforates and pass to allow waste gas to be clean (being represented by the arrow in metal foam element 1 left side) herein.At least a composition in the metal or metal alloy is the element as the used catalyst of hydrocarbon oxidation.Appropriate catalyst can for example comprise one or more elements that are selected from following group: iron (Fe), nickel (Ni), silver (Ag), platinum (Pt), palladium (Pd).
1a is coated on the metal foam element 1 with the zeolite coating.Say that more accurately 1a is coated on the hole pattern of metal foam element 1 with the zeolite coating.About this point, what should indicate is, the diagram among Fig. 1 only is interpreted as schematic diagram, and this is because for the illustrated one deck zeolite that only shows for the purpose of clear around metal foam element 1.Yet in fact, zeolite coating 1a is arranged on the whole surface of metal foam element 1 basically, that is, and and on the hole pattern of metal foam element 1.
Although carrier coating is not shown among the figure, it can be used as extra play and is arranged between metal foam element 1 and the zeolite coating 1a.Carrier coating comprises the catalytic material that further promotion hydrocarbon decomposes.
Filter system also comprises heater 2, and this device is schematically illustrated as flame herein.Yet heater 2 is not limited to heat combustor, but also can comprise other devices of heating of metal foam element 1.Classify eddy-current heating, burner or resistance heated as example.During operation, this heating is used for heating of metal foam element 1, until reaching or being kept for making the hydrocarbon that is included in the waste gas to carry out the ideal temperature T of catalyzed conversion S
If filter system is following embodiment, promptly do not have zeolite coating 1a according to this embodiment metal foam element 1, so preferably before off-gas flows enters filter system, come heating of metal foam element 1 or activate heating element heater 2.During filtering, the feasible desired ideal temperature T that is used to burn of the working method of heating element heater 2 SKept.
Yet, if filter system is following embodiment, promptly zeolite coating 1a is coated on the metal foam element 1 according to this embodiment, make heating element heater 2 activation and inactive according to other standards so.At first, heating element heater 2 keeps closing, and the result is that off-gas flows passes metal foam element 1, wherein is included in the catalytic oxidation that there is not or only exists limited extent in hydrocarbon in the waste gas.Yet, stop hydrocarbon to pass filter system further as the zeolite layer 1a of molecular sieve.Zeolite in the coating can be zeolite natural or synthetic preparation.Because zeolite layer 1a has big absorbability for the molecule of specific dimensions, therefore can come detention reliably to be included in hydrocarbon in the waste gas by selecting zeolite suitably.The zeolite coating preferably has the thickness d between about 10 μ m and about 500 μ m.Certainly, this thickness should be considered as absolute limiting value.If the expectation or be necessary that the thickness that so also can select other is to be used for zeolite coating 1a.
Because the absorbability of zeolite is limited, so the regeneration of zeolite layer 1a must be carried out every now and then.In the framework of this regeneration, when the absorbability of zeolite layer becomes too small and can not still effectively purify waste gas the time, activates heater 2.When having activated heater 2, preferably metal foam element 1 heats up and reaches desired reference temperature T until it S, the specificity of catalyst of metal foam element 1 obtains activating under this temperature.In this way, in this process, can make the hydrocarbon of being accumulated by molecular sieve (being zeolite layer 1a) carry out oxidation reaction subsequently, hydrocarbon is converted to for example CO in this reaction 2And water.If zeolite layer is able to abundant emptying once more, promptly regenerated, make heater 2 stop using once more or close so, thereby make the process circulation that beginning is new.Thereby can carry out such regeneration according to the frequency of expectation.
Referring now to Fig. 2 a,, the synergy according to each element in the filter system of the first embodiment of the present invention is made an explanation.Metal foam element 1 and heater 2 are shown among Fig. 2 a in the framework of block diagram.Should indicate, in this first embodiment, metal foam element 1 does not comprise the zeolite coating.Except the element of having mentioned, also there is the adjuster that identifies by Reference numeral 3.Adjuster 3 can for example have temperature sensor, control element and be used to import reference temperature T SInput unit.Certainly, also can have other elements such as storage device, in described storage device, preserve the reference temperature be applicable to different catalysts, that is, make catalytic reaction carry out enough fast temperature.
Adjuster 3 for example obtains temperature data by temperature sensor mentioned above from metal foam element 1.With the measurement temperature (temperature data) of metal foam element 1 with preset reference temperature T SCompare and when the difference between preset temperature and the actual temperature surpassed particular value, adjuster 3 activated heaters 2 (for example, by control element mentioned above).
Certainly, adjuster 3 also can be regulated the temperature upper limit of metal foam element 1.Thereby, when measuring temperature and reference temperature T SBetween difference when oppositely surpassing the limiting value of determining, heater 2 is stopped using.
Can be discontinuously or write down temperature continuously.Waste gas purification process according to first embodiment can be carried out in fully automatic mode by adjuster 3.
Referring to Fig. 2 b, show the second embodiment of the present invention, it is compared with embodiment among Fig. 2 a and expands.
According to second embodiment, filter cell 1 has zeolite coating 1a, and from the flow direction of waste gas, described zeolite coating is arranged on the back of metal foam element 1.As indicated above, if select the appropriate bore size of zeolite layer at hydrocarbon to be leached, zeolite layer is owing to its absorption characteristic is guaranteed to carry out machinery and leach being included in hydrocarbon in the waste gas so.With regard to second embodiment, according to hereinafter described carrying out the waste gas purification process:
In the first method stage, the machinery of described hydrocarbon leaches mainly or is to be undertaken by the detention of zeolite coating 1a fully.This means that adjuster 3 is not activated.In other words, do not heat, but in first method in the stage, metal foam element 1 does not have its reference temperature T S
During this first method stage, the still available absorbability of continuously or intermittently monitoring zeolite layer.For this reason, comprised measurement mechanism 4, it is used for measuring the amount of the hydrocarbon that is included in zeolite layer 1a.Therefore measurement mechanism 4 learns the details of its loading condition from zeolite layer 1a.Metrical information is passed to microprocessor 5, form difference between the maximum of described microprocessor absorbable hydrocarbon in given zeolite layer 1a and the current amount that is included in the hydrocarbon in the zeolite layer that records by measurement mechanism 4.The absorbability that zeolite layer 1a is still available thereby determined.
Those of skill in the art are clear that, also can form relative value and replace described absolute figure.In this case, microprocessor is designed to its percentage that for example still available absorbability of zeolite layer is calculated as maximum absorbance capacity.
If current available absorbability is reduced to the first preset threshold value S 1Under, microprocessor 5 activates heater 2 by opening adjuster 3 so.Adjuster 3 keeps in the stage activating in whole second method now.In stage, adjuster 3 is according to carrying out work in conjunction with the described mode of Fig. 2 a in second method, that is, it rises to metal foam element 1 and presets reference temperature T SAnd keep this temperature basically.
In this second method stage, carry out zeolite layer 1a discharging or regeneration until reaching aspiration level.Aspiration level is by the second threshold value S 2Definition, described second threshold value can be pre-defined by the operator.If based on the current available absorbability of zeolite layer (with absolute or relative measurement numerical value form), the second threshold value S 2Greater than first threshold S 1As the second threshold value S that exceeds current absorbability now 2The time, that is, when zeolite layer had the desired absorbability of operator once more, microprocessor 5 was stopped using adjuster 3 and thereby heater 2 is stopped using.Therefore turned back to for the first method stage from the second method stage.
Utilization is according to filter system of the present invention or the method according to this invention, can use a few resources, especially with few energy consumption, comes to remove relatively simply from waste gas hydrocarbon.Because described resources economy, also be applicable to less japanning room and also be applicable in other purposes that the waste gas of relatively small amount need purify according to filter system of the present invention.
In following embodiment, promptly on filter cell, there is zeolite layer extraly according to described embodiment, can reduce the required energy consumption of regeneration by the absorption energy that utilization is stored in the hydrocarbon in the zeolite coating further.The utilization of used heat that derives from the chemical combustion reaction (heat release tempestuously) of hydrocarbon makes that also the energy relevant with the heating of metal foam element saved.

Claims (13)

1. one kind is used for comprising from the filter system of waste gas removal hydrocarbon:
-metal foam element (1), wherein said metal foam comprise at least a element that is used as the oxidation catalyst of hydrocarbon as alloy compositions;
-heater (2) is designed for heating described metal foam element (1).
2. filter system according to claim 1 is characterized in that, has adjuster (3), and described adjuster is designed to regulate described heater (2) makes described metal foam element (1) remain on the reference temperature T that presets S
3. filter system according to claim 1 is characterized in that, described heater (2) is designed to heat described metal foam element (1) by resistive heating system or induction heating apparatus.
4. filter system according to claim 1 is characterized in that, described heater (2) forms burner, and described burner produces naked light and heats described metal foam element (1).
5. filter system according to claim 1 is characterized in that, zeolite layer (1a) is coated on the described metal foam element (1).
6. filter system according to claim 5 is characterized in that, the thickness d of described zeolite layer (1a) is between 10 μ m and 500 μ m.
7. filter system according to claim 5 is characterized in that, described filter system also has following apparatus:
-measurement mechanism (4), described measurement mechanism are used for measuring the amount of the hydrocarbon that is included in described zeolite layer (1a);
-microprocessor (5), described microprocessor be used between the maximum of the absorbable hydrocarbon of described zeolite layer (1a) and the amount that is included in the hydrocarbon in the described zeolite layer (1a) that records by described measurement mechanism (4), forming difference and be used for when described difference less than the first threshold S that presets 1The time activate described heater (2).
8. filter system according to claim 7 is characterized in that, described microprocessor (5) is designed to work as described difference greater than the second threshold value S that presets 2The time described heater (2) is stopped using, S wherein 2＞S 1
9. filter system according to claim 1 is characterized in that, described metal foam element (1) is coated with the carrier coating that comprises the catalytic material that is used for the hydrocarbon burning.
10. one kind is used for comprising from the method for waste gas removal hydrocarbon:
-described waste gas is passed comprising metal foam element (1) and be used to heat on the filter system of heater (2) of described metal foam element (1), wherein said metal foam comprises the element as at least a oxidation catalyst as hydrocarbon of alloy compositions; And
-heat described metal foam element (1) by described heater (2).
11. method according to claim 10 is characterized in that, the step that heats described metal foam element (1) is carried out by resistance heated, eddy-current heating or by flame heat.
12. method according to claim 10, it is characterized in that, zeolite layer (1a) is coated on the described metal foam element (1), and wherein said method also comprises the step of measuring the amount be included in the hydrocarbon in the described zeolite layer (1a) and only when the maximum of absorbable hydrocarbon in the described zeolite layer (1a) and be included in difference between the measured quantity of the hydrocarbon in the described zeolite layer (1a) less than the first threshold S that presets 1The time just heat the step of described metal foam element (1).
13. method according to claim 12 is characterized in that, when described difference greater than the second threshold value S that presets 2The time finish the step of the described metal foam element of heating (1), wherein S 2＞S 1
CN2010105161571A 2009-10-19 2010-10-19 Metal foam matrix filter system for removing hydrocarbons from exhaust air and method thereof Pending CN102039089A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009049732.3 2009-10-19
DE102009049732.3A DE102009049732B4 (en) 2009-10-19 2009-10-19 Metal foam-based filter system for removing hydrocarbons from exhaust air and method for removing hydrocarbons from exhaust air

Publications (1)

Publication Number Publication Date
CN102039089A true CN102039089A (en) 2011-05-04

Family

ID=43798879

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105161571A Pending CN102039089A (en) 2009-10-19 2010-10-19 Metal foam matrix filter system for removing hydrocarbons from exhaust air and method thereof

Country Status (3)

Country Link
KR (1) KR101246334B1 (en)
CN (1) CN102039089A (en)
DE (1) DE102009049732B4 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010060888A1 (en) * 2010-11-30 2012-05-31 Heimer Lackieranlagen Und Industrielufttechnik Gmbh & Co. Kg Method for catalytic exhaust gas cleaning, involves directing solvent-loaded exhaust gas through catalyst bed, where exothermic oxidation reaction takes place
DE102014218596A1 (en) 2014-09-16 2016-03-17 Volkswagen Aktiengesellschaft Thermal afterburning apparatus and method for thermal afterburning
US9827530B2 (en) 2015-01-30 2017-11-28 Hamilton Sundstrand Corporation Enhanced device for separation of oxygen and nitrogen
ES2920969T3 (en) 2019-09-25 2022-08-12 Evonik Operations Gmbh catalytic reactor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1364657A (en) * 2001-01-10 2002-08-21 Abb研究有限公司 Method for forming zeolite layer on substrate
CN101391164A (en) * 2007-09-21 2009-03-25 瓦特西拉瑞士股份有限公司 Exhaust gas particle filter and method for manufacturing an exhaust gas particle filter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729126A1 (en) * 1987-09-01 1989-04-06 Mototech Motoren Umweltschutz Diesel soot-particle filter and process for the production thereof
DE4033353A1 (en) * 1990-10-19 1992-04-23 Siemens Ag Waste air purifying system - using oxidn. catalyst to oxidise organic content
JPH0631127A (en) * 1992-07-20 1994-02-08 Nippon Steel Corp Method and device for deodorizing painting waste gas
DE4224172C2 (en) * 1992-07-22 1997-11-20 Bernhard Nibbrig Gas cleaning device
KR100464624B1 (en) 1997-09-23 2005-04-06 에스케이 주식회사 Regeneration time adjustment method of diesel fuel filter
KR100593249B1 (en) * 2004-05-13 2006-06-26 한국전기연구원 Regenerative diesel particulate filter system comprising microwave heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1364657A (en) * 2001-01-10 2002-08-21 Abb研究有限公司 Method for forming zeolite layer on substrate
CN101391164A (en) * 2007-09-21 2009-03-25 瓦特西拉瑞士股份有限公司 Exhaust gas particle filter and method for manufacturing an exhaust gas particle filter

Also Published As

Publication number Publication date
DE102009049732A1 (en) 2011-04-21
KR101246334B1 (en) 2013-03-21
KR20110043456A (en) 2011-04-27
DE102009049732B4 (en) 2015-06-03

Similar Documents

Publication Publication Date Title
CN102039089A (en) Metal foam matrix filter system for removing hydrocarbons from exhaust air and method thereof
US20100326290A1 (en) Cooking oven comprising exhaust gas purification assembly
NZ539973A (en) Application of conductive absorbents, activated carbon granules and carbon fibers as substrates in catalysis
EA014126B1 (en) Coating for particulate filters
Ciambelli et al. Performances of a catalytic foam trap for soot abatement
CN205269406U (en) Simple and easy VOCs catalytic oxidation treater
JPH0460108A (en) Catalyst converter for purifying exhaust gas of vehicle and purification method of exhaust gas of vehicle
TW200803982A (en) Method for purification of exhaust gas from internal-combustion engine
JPH10267248A (en) Catalyst type exhaust gas processor
EP0903476A1 (en) Exhaust emission control catalyst, exhaust emission control catalyst manufacturing method, exhaust emission control filter, exhaust emission control filter manufacturing method, and exhaust emission control apparatus
EP2906343A2 (en) Metal-supported catalyst structures and processes for manufacturing the same
Wang et al. Electrothermal catalysis for heterogeneous reaction: Mechanisms and design strategies
CN1333246C (en) Gas concentration sensor, hydrogen purification unit using this and cell system
JPH10272324A (en) Apparatus for treating gas
US20140311122A1 (en) Flow controlled electrically assisted dpf regeneration
JP2014503749A (en) How to operate an exhaust system
CN108144614B (en) Catalyst for catalytic oxidation
Walther et al. Applications of metal foam as catalyst carrier
Idamakanti et al. Electrified Catalysts for Endothermic Chemical Processes: Materials Needs, Advances, and Challenges
JPH10274030A (en) Exhaust emission control device
KR101331185B1 (en) Emission control mehtod for deisel electric generator
Antsiferov et al. High‐Porosity Permeable Cellular Metals and Alloys in Catalytic Processes of Gas Cleaning
JP2018192067A (en) Desmoking and deodorizing filter
JPH02107338A (en) Catalyst for decomposing contaminated gas and its usage
TW200932350A (en) Catalyst for regenerative catalytic oxidizer, method for producing the same and method for treating volatile organic compounds

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110504