EP0714497B1 - Usage d'un filtre hydrophobique dans un procede pour l'elimination et l'oxydation des constituants organiques de vapeurs de cuisine - Google Patents

Usage d'un filtre hydrophobique dans un procede pour l'elimination et l'oxydation des constituants organiques de vapeurs de cuisine Download PDF

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Publication number
EP0714497B1
EP0714497B1 EP94926872A EP94926872A EP0714497B1 EP 0714497 B1 EP0714497 B1 EP 0714497B1 EP 94926872 A EP94926872 A EP 94926872A EP 94926872 A EP94926872 A EP 94926872A EP 0714497 B1 EP0714497 B1 EP 0714497B1
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EP
European Patent Office
Prior art keywords
filter
organic components
catalyst
exhaust air
heated
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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.)
Expired - Lifetime
Application number
EP94926872A
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German (de)
English (en)
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EP0714497A1 (fr
Inventor
Malte Dr. Berndt
Martin Meister
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.)
Engelhard Italiana SpA
Original Assignee
Doduco GmbH and Co KG Dr Eugen Duerrwaechter
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Application filed by Doduco GmbH and Co KG Dr Eugen Duerrwaechter filed Critical Doduco GmbH and Co KG Dr Eugen Duerrwaechter
Publication of EP0714497A1 publication Critical patent/EP0714497A1/fr
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Publication of EP0714497B1 publication Critical patent/EP0714497B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2042—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft
    • F24C15/205—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft with means for oxidation of cooking fumes
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/36—Kitchen hoods

Definitions

  • the invention relates to the use of a hydrophobic filter separated from the heated catalyst in a process for removing and oxidizing organic components of kitchen fumes from an exhaust air stream by passing the Exhaust air flow through a filter so that the organic components of the Filters are adsorbed, and then desorbing the filter by applying heat outside the adsorption phase, the desorbed components the kitchen vapors are catalytically converted using a heated catalyst become.
  • the device known from DE-A-23 63 820 has an assembly of one Filters and a heated catalyst through which the organic Components contaminated exhaust air is passed through after pre-filtering, the organic components alternately adsorbed by the filter and desorbed by the application of heat and afterburned catalytically.
  • the disadvantage this device is that the filter has to be desorbed frequently, preferably after each suction process. Given a high percentage of The filter is despite water vapor and water droplets in kitchen vapors of an upstream grease filter is no longer receptive after a short time. In addition comes that desorbing water because of the high specific heat and heat of vaporization of water a high energy expenditure for the Heating of the filter and the catalyst is required.
  • the invention is therefore based on the object, the method of the aforementioned Kind to design and develop in such a way that the energy expenditure for the desorbing and catalytic conversion of the adsorbed components Kitchen fumes is reduced.
  • This task is characterized by the characteristics of the solved only claim.
  • a hydrophobic filter is used. That has the advantage, that the organic components of the kitchen vapors are selectively adsorbed, but not the water vapor or water droplets contained in the kitchen vapors, so that the filter of the water, which it does not even adsorb, also does not have to be freed again.
  • the filter is regenerated by supplying heat and the catalyst is only timed limited and therefore energy-saving for the catalytic oxidation of the organic Heated components. This is possible because the organic components of the kitchen vapor is not constantly subjected to catalysis, but initially adsorbed by the filter and cached and from time to time Time to be reacted on the heated catalyst, including the organic components desorbed from the filter - if it is in front of the catalytic converter - by heating become.
  • the desorption phase is carried out at the latest when the filter with organic Components is saturated.
  • the catalytic oxidation of the organic Components then also take place, preferably when the kitchen operation is stopped is, for example at night.
  • zeolites exhibit because of their specific chemical and physical properties in a wide range A particularly high range can be modified in their manufacture Adsorption capacity, especially for gaseous substances.
  • zeolites When filtering For air vents that contain kitchen vapors, zeolites are suitable that are hydrophobic Have properties and therefore selectively the organic components of kitchen fumes adsorb, but not adherent to kitchen fumes Steam.
  • Zeolites can be in the form of a powder bed, a bed of granules or a monolithic body.
  • zeolites Preferably be Granulate fillings are used because they are better than the powder bed Have flowability and cheaper compared to the monolithic body are to be produced.
  • a special property of zeolites is their reversible adsorption capacity, i.e. she give the previously adsorbed organic components when the temperature rises again.
  • the desorption temperature depends on the one hand on the characteristic Properties of the zeolite, especially its optionally modified surface properties and the nature of the adsorbed organic components yourself. Suitable desorption temperatures are in the range of 150 ° C to 300 ° C, being a higher temperature leads to an advantageous high desorption rate, however the upper limit of the desorption temperature to avoid unwanted carburizing, what the regeneration ability of the zeolite and would affect the filter.
  • Zeolites or filters as described above, when heat is applied desorb the organic components again hereinafter referred to as "desorbing zeolites" or “desorbing Filter ".
  • zeolites has compared to that in kitchens otherwise used, hardly desorbable adsorption filter the advantage of activated carbon or nonwoven mats, to be thermally more resilient.
  • One way to modify the specific Properties of the zeolite is that Surface of the zeolites with, among other things, catalytic effective and the organic components with the addition of oxygen to provide oxidizing substances, in particular with precious metal salts.
  • the catalytic effect of the zeolite and thus of the filter Heat supply activated.
  • the one before adsorbing zeolite is expediently at Temperatures from 200 ° C to 900 ° C operated as a catalyst. Preferably in the range of 200 ° C to 450 ° C.
  • Filters and zeolites that are the previously absorbed organic Components with the application of heat catalytically oxidize are further referred to as "oxidizing zeolites" or "oxidizing filter” called.
  • the filter can be heated in a number of ways.
  • the filter can be directly, in particular by means of be heated by an electric heating device.
  • the filter can also be designed as a heat exchanger be, for example, according to the cross-flow principle, any waste heat to heat the filter to be able to use.
  • the filter can be heated indirectly by giving him, for example, a heater is connected upstream, which heats the exhaust air flow, before entering the filter.
  • the heater can, for example, in turn be operated electrically or as a heat exchanger be designed.
  • the inventive method can be carried out as a filter a "desorbable filter", in particular a zeolite, is used and the catalytic Oxidation in a separate but fluidically connected and heated catalyst is carried out.
  • a "desorbable filter” in particular a zeolite
  • the filter is also a catalyst, as was the case with the "oxidizing zeolite” described. This reduces the number of components and the device to carry out the method can be made more compact overall become.
  • the advantage of a catalyst separated from the "desorbing filter” is that the catalyst, for example, several filters during which Desorption phases can be assigned simultaneously or at different times.
  • one of the Filter separate catalyst can be arranged in a branch line, which in the Adsorption phase is not flowed through, so that the catalyst in the adsorption phase is not burdened, especially not with water vapor.
  • the catalyst downstream of the desorbing filter can be heated are heated directly or indirectly, the type of heating preferably is electrical.
  • Heaters of a "desorbing filter” and a downstream catalyst as well as an “oxidizing filter” can be assigned by them Switching devices regardless of the assigned and the exhaust air flow generating fan are switched so that when they reach the Saturation of the filter or can be operated earlier if required.
  • the heaters of the "desorbing filter” and the downstream catalyst also be designed as a common heating device or a common one Have switching device because the desorption and the catalytic oxidation in the catalyst downstream of the filter takes place almost simultaneously. By certain circuitry precautions can be ensured that the Catalyst is heated to its operating temperature immediately before the Filter is heated and the desorption is started.
  • the suspend the exhaust air flow leaving the filter is advantageously realized in that the catalyst is bypassed and shut-off devices in the bypass and / or through the bypass section of the exhaust air duct are provided with the catalyst and for example are designed as controllable valves.
  • the in the gaseous carrier medium after the catalytic Oxidation of the organic components stored Heat can at least partially desorb or fed to catalysis. This can happen, for example, in such a way that the heated one Exhaust air if necessary as a cross-flow heat exchanger designed filter or a heat exchanger that is upstream of the filter and the supplied to the filter Exhaust air should be heated, is supplied. It is also possible that part of the catalyst escaping and heated exhaust air in the filter entering, colder exhaust air is added to to heat them, but with a minimum oxygen content not in the exhaust air supplied to the filter may fall below, otherwise the following catalytic oxidation is incomplete.
  • the device consists of a hydrophobic filter 2, a catalyst 3 and a fan 4 which generates an exhaust air flow 5, the filter 2, the catalyst 3 and the fan 4 being arranged downstream in terms of flow and connected via the exhaust air duct.
  • the exhaust air duct 6 branches in front of the catalytic converter 3 into a bypass 7, which bridges the catalytic converter 3 and opens again into the exhaust air duct 6 in front of the fan 4.
  • a first controllable shut-off device 8 is arranged in the bypass 7.
  • a second controllable shut-off device 9 is provided in front of the catalytic converter 3.
  • a heating device 10 or 11 is integrated in the filter 2 or the catalytic converter 3 and can be switched independently of one another and independently of the fan 4.
  • the shut-off device 8 is open and the shut-off device 9 is closed, so that the exhaust air stream 5 is directed past the catalyst 3.
  • the heating devices 10 and 11 are switched off and the filter 2 and the catalyst 3 are at a low temperature T 0 , where T 0 is less than 100 ° C.
  • T 0 is less than 100 ° C.
  • the organic constituents 1 located in the exhaust air stream 5 adsorb in the filter 2.
  • the exhaust air purified in this way is drawn off via the bypass.
  • the catalyst 3 is heated to its operating temperature T 2 (for example 350 ° C.) by means of the second electrical heating device 11.
  • the second shut-off device 9 is opened and then the first shut-off device 8 is closed.
  • the first heating device 10 then brings the filter 2 to its desorption temperature T 1 (for example 200 ° C.).
  • T 1 for example 200 ° C.
  • the organic constituents 1 released from the filter during the desorption phase (FIG. 2) are transported to the catalytic converter 3 by means of the exhaust air flow 5 via the exhaust air duct 6. There, the desorbed organic constituents 1 are directly catalytically oxidized before they leave the device via the fan 4.
  • the first heating device 10 and the second heating device 11 are switched off again, the first shut-off device 8 is opened again and the second shut-off device 9 is closed again.
  • the filter 2 is now in a regenerated form and, after cooling to T 0, can again adsorb new organic constituents 1 from the exhaust air stream 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Claims (1)

  1. Utilisation d'un filtre hydrophobe (2) séparé d'un catalyseur chauffé (3) dans un procédé pour l'élimination et l'oxydation des constituants organiques (1) de vapeurs de cuisine à partir d'un courant d'air d'évacuation (5) en faisant passer le courant d'air d'évacuation (5) à travers le filtre (2) de telle sorte que les constituants organiques (1) sont adsorbés par le filtre (2), et pour la désorption ultérieure du filtre par apport de chaleur à l'extérieur de la phase d'adsorption, dans laquelle les constituants désorbés (1) des vapeurs de cuisine sont transformés par voie catalytique à l'aide d'un catalyseur chauffé (3).
EP94926872A 1993-08-24 1994-08-24 Usage d'un filtre hydrophobique dans un procede pour l'elimination et l'oxydation des constituants organiques de vapeurs de cuisine Expired - Lifetime EP0714497B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4328405 1993-08-24
DE4328405A DE4328405A1 (de) 1993-08-24 1993-08-24 Verfahren und Vorrichtung zum Entfernen und Oxidieren organischer Bestandteile von Küchendünsten
PCT/EP1994/002796 WO1995006227A1 (fr) 1993-08-24 1994-08-24 Procede et dispositif pour l'elimination et l'oxydation des constituants organiques de vapeurs de cuisine

Publications (2)

Publication Number Publication Date
EP0714497A1 EP0714497A1 (fr) 1996-06-05
EP0714497B1 true EP0714497B1 (fr) 1999-07-28

Family

ID=6495873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926872A Expired - Lifetime EP0714497B1 (fr) 1993-08-24 1994-08-24 Usage d'un filtre hydrophobique dans un procede pour l'elimination et l'oxydation des constituants organiques de vapeurs de cuisine

Country Status (4)

Country Link
US (1) US5858316A (fr)
EP (1) EP0714497B1 (fr)
DE (2) DE4328405A1 (fr)
WO (1) WO1995006227A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19730292C1 (de) * 1997-07-15 1999-03-11 Daimler Benz Ag Anlage zur Entfernung gasförmiger organischer Stoffe aus der Luft
US7094388B2 (en) * 2000-04-21 2006-08-22 Dte Energy Technologies, Inc. Volatile organic compound abatement through a fuel cell
FR2886869B1 (fr) * 2005-06-14 2007-08-31 Saint Gobain Ct Recherches Structure et filtre catalytique pour la filtration d'un gaz comprenant un ciment hydrophobe ou oleophobe
EP2893967A1 (fr) * 2014-01-10 2015-07-15 Berbel Ablufttechnik Gmbh Dispositif et procédé pour élimination des odeurs
CN104728893A (zh) * 2015-03-30 2015-06-24 宁波博业环保科技有限公司 一种厨房油烟处理系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658742A (en) * 1950-01-09 1953-11-10 Harold R Suter Catalytic fume incineration
GB1206829A (en) * 1968-01-26 1970-09-30 Carr Fastener Co Ltd Means for cleaning air or gases in domestic cooking ovens
DE2363820C3 (de) * 1973-12-21 1980-02-21 Licentia-Patent-Verwaltungs-Gmbh, 6000 Frankfurt Küchendunstfiltervorrichtung
JPS5096178A (fr) * 1973-12-24 1975-07-31
US4235220A (en) * 1979-06-07 1980-11-25 Hepner Robert J Cooking stove exhaust air filtration system
DE3447481A1 (de) * 1984-12-27 1986-07-03 Küppersbusch AG, 4650 Gelsenkirchen Bratroehre mit selbsttaetiger beseitigung von geruchs- u. verschmutzungsteilchen in der bratroehrenluft
DE3636250A1 (de) * 1986-10-24 1988-04-28 Josef Dr Muschawek Verfahren und vorrichtung zur beseitigung von gasfoermigen verunreinigungen aus einem rohgas
DE3715598A1 (de) * 1987-05-09 1988-11-24 Licentia Gmbh Herd mit pyrolytischer selbstreinigung des bratraumes
JPH0615016B2 (ja) * 1988-09-09 1994-03-02 トヨタ自動車株式会社 自動車排気ガス浄化装置
JPH03141816A (ja) * 1989-10-27 1991-06-17 Toyota Motor Corp 排気ガス浄化装置
DE4142336A1 (de) * 1991-12-20 1993-06-24 Bosch Siemens Hausgeraete Wrasenleitung

Also Published As

Publication number Publication date
US5858316A (en) 1999-01-12
DE4328405A1 (de) 1995-03-02
WO1995006227A1 (fr) 1995-03-02
DE59408549D1 (de) 1999-09-02
EP0714497A1 (fr) 1996-06-05

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