DE3703137A1 - Multiply active bactericidal/fungicidal chemisorption filter for treating breathing air, in particular for allergic people - Google Patents

Multiply active bactericidal/fungicidal chemisorption filter for treating breathing air, in particular for allergic people

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Publication number
DE3703137A1
DE3703137A1 DE19873703137 DE3703137A DE3703137A1 DE 3703137 A1 DE3703137 A1 DE 3703137A1 DE 19873703137 DE19873703137 DE 19873703137 DE 3703137 A DE3703137 A DE 3703137A DE 3703137 A1 DE3703137 A1 DE 3703137A1
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Germany
Prior art keywords
layer
chemisorption
iron
filter
alkaline
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.)
Granted
Application number
DE19873703137
Other languages
German (de)
Other versions
DE3703137C2 (en
Inventor
Heinz Dipl Ing Hoelter
Heinrich Dipl Ing Igelbuescher
Heinrich Ing Grad Gresch
Heribert Dipl Ing Dewert
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Individual
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Individual
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Priority to DE19873703137 priority Critical patent/DE3703137A1/en
Publication of DE3703137A1 publication Critical patent/DE3703137A1/en
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Publication of DE3703137C2 publication Critical patent/DE3703137C2/de
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/117—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering
    • F24F8/133—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering by direct contact with liquid, e.g. with sprayed liquid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/1055—Filters bacterial
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D9/00—Composition of chemical substances for use in breathing apparatus
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • 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
    • B01D53/84—Biological processes
    • B01D53/85—Biological processes with gas-solid contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • 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
    • B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
    • 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
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/91—Bacteria; Microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

This invention describes a multiple-layer chemisorption filter which can be used to treat breathing air contaminated by acidic, basic or neutral, organic or inorganic substances or dust, bacteria, viruses, mites, pollen, moulds etc. Taking into account the selection of materials and reagents, the individual chemisorption layers alternately have a composition of alkaline pH greater than 12, of acidic pH 0.5-1.5 and neutral, with which, in addition to the pollutant separation, a bactericidal activity is also achieved.

Description

Es ist bekannt, daß die Atemluft sehr oft mit festen, flüssigen und gasförmigen Schadstoffen belastet ist, die beim Menschen zu erheblichen Schwierigkeiten im Atmungsbereich und zu Allergien führen können.It is known that the air we breathe very often is contaminated with liquid and gaseous pollutants, which cause considerable difficulties in humans Breathing area and allergies.

Dabei kann es sich um saure Schadstoffe wie HF, HCl, SO3, SO2, NO x usw. oder basisch reagierende Schadstoffe wie Ammoniak, Amine usw. handeln. Weiterhin kann die Atemluft zusätzlich zu den anorganischen Schadstoffen auch die den Menschen gefährdenden organischen Schad­ stoffe wie Benzol, Dioxine, Furane, Benzpyrene, Aldehyde usw. und außerdem Tabakrauch enthalten.These can be acidic pollutants such as HF, HCl, SO 3 , SO 2 , NO x etc. or basic reacting pollutants such as ammonia, amines etc. In addition to the inorganic pollutants, the air we breathe can also contain the organic pollutants that endanger humans, such as benzene, dioxins, furans, benzpyrenes, aldehydes, etc. and also tobacco smoke.

Sämtliche Schadstoffe können als Gas oder Aerosole zusätzlich gemeinsam mit Staub jeglicher Art (u. U. auch Bakterien, Viren, Milben, Pollen, Pilze usw.) in der Atemluft vorhanden sein.All pollutants can be gas or aerosols  additionally together with dust of any kind (possibly also Bacteria, viruses, mites, pollen, fungi etc.) in the Breathing air is available.

Um die Atemluft von den vorab aufgeführten Schadstoffen zu säubern, damit erkrankten Menschen geholfen werden kann und gesunde Menschen geschützt werden können, wird erfindungsgemäß nach der Zeichnung die Anwendung eines Chemisorptionsfilters, das außerdem die in der Atemluft befindlichen Bezillen, Keime, Viren und Pilze abtötet, zurückhält und somit bakterizid wirkt, vorge­ schlagen.To the breathing air from the previously listed pollutants to clean so that sick people can be helped can and healthy people can be protected according to the invention the application a chemisorption filter, which is also used in the The respiratory tract, germs, viruses and fungi kills, holds back and thus has a bactericidal effect, pre beat.

In der Zeichnung ist dargestellt:The drawing shows:

  • mit (1) der Lufteintritt des Chemisorptionsfilters;with ( 1 ) the air inlet of the chemisorption filter;
  • mit (2) die dem Chemisorptionsfilter vorgeschaltete Hochleistungsfeinstaub-Filterschicht;with ( 2 ) the high-performance fine dust filter layer upstream of the chemisorption filter;
  • mit (3) eine alkalisch reagierende Chemisorptions­ schicht, bestehend aus Raseneisenerz (FeOOH), geblähten Körpern mit sehr großer Oberfläche, vorzugsweise ein geblähtes Natrium-Aluminiumsulfat und/oder Perlite getränkt mit Natrium- oder Kaliumcarbonat oder ein Gemisch derselben oder Natronkalk. Alle Massen haben einen pH-Wert, der im Bereich von pH < 12 liegt.with ( 3 ) an alkaline chemisorption layer consisting of turf iron ore (FeOOH), bloated bodies with a very large surface area, preferably a bloated sodium aluminum sulfate and / or perlite impregnated with sodium or potassium carbonate or a mixture thereof or soda lime. All masses have a pH value that is in the range of pH <12.
  • Mit (4) ist die nachfolgende Sorptionsschicht bezeich­ net, die aus geblähten Körpern mit sehr großer Oberfläche besteht, vorzugsweise ein geblähtes Natrium-Aluminiumsulfat und/oder Perlite, ge­ tränkt mit Eisen-II- und Eisen-III-Salzen. Es können auch weiterhin als Eisensalze Doppel­ salze wie Eisen-II- oder Eisen-III-Ammonium­ sulfate Anwendung finden. Zusätzlich werden bei der Tränkung den Eisensalzen Calcium­ chloriddihyrat zur Feuchtehaltung der Sorp­ tionsschicht zugegeben. Ebenfalls können zur Pufferung und pH-Wert-Konstanz mehrbasische Carbonsäuren Anwendung finden. Alle Massen haben einen pH-Wert, der im Bereich von pH 0,5-1,5 liegt. With ( 4 ) the following sorption layer is referred to, which consists of expanded bodies with a very large surface area, preferably an expanded sodium aluminum sulfate and / or perlite, impregnated with iron (II) and iron (III) salts. Double salts such as iron (II) or iron (III) ammonium sulfate can also be used as iron salts. In addition, calcium chloride dihydrate is added to the iron salts to keep the sorption layer moist. Polybasic carboxylic acids can also be used for buffering and pH stability. All masses have a pH value in the range of pH 0.5-1.5.
  • Mit (5) ist die Chemisorptionsschicht bezeichnet, die die Masse wie unter (3) beschrieben (alkalisch, pH < 12) enthält.( 5 ) denotes the chemisorption layer which contains the mass as described under ( 3 ) (alkaline, pH <12).
  • Mit (6) ist eine neutrale Sorptionsschicht dargestellt, die vorzugsweise aus Aktiv-Kohle besteht.With ( 6 ) a neutral sorption layer is shown, which preferably consists of activated carbon.
  • Mit (7) ist eine dem Chemisorptionsfilter nachgeschaltete Hochleistungsfeinstaub-Filterschicht dargestellt.( 7 ) shows a high-performance fine dust filter layer connected downstream of the chemisorption filter.
  • Mit (8) ist der Reinluftaustritt des Chemisorptionsfilters dargestellt.The ( 8 ) shows the clean air outlet of the chemisorption filter.

Claims (6)

1. Verfahren zur Abscheidung von sauer, basisch oder neutral reagierender organischer oder anorganischer, mit Staub, Bakterien, Viren, Milben, Pollen, Pilzen usw. belasteter Atemluft einschließlich Tabakrauch aus der Atemluft, dadurch gekennzeichnet, daß erfindungsgemäß ein Mehr­ schichten-Chemisorptionsfilter Anwendung findet, das erfindungsgemäß in folgender Schichtenfolge schüttbett­ gerecht aufgebaut ist:
  • Mit (1) ist der Lufteintritt des Chemisorptionsfilters dargestellt;
  • mit (2) die dem Chemisorptionsfilter vorgeschaltete Hochleistungsfeinstaub-Filterschicht;
  • mit (3) eine alkalisch reagierende Chemisorptions­ schicht, bestehend aus Raseneisenerz (FeOOH), geblähten Körpern mit sehr großer Oberfläche, vorzugsweise ein geblähtes Natrium-Aluminium­ sulfat und/oder Perlite getränkt mit Natrium- oder Kaliumcarbonat oder ein Gemisch derselben oder Natronkalk.
    Alle Massen haben einen pH-Wert, der im Bereich von pH < 12 liegt.
  • Mit (4) ist die nachfolgende Sorptionsschicht bezeich­ net, die aus geblähten Körpern mit sehr großer Oberfläche besteht, vorzugsweise ein geblähtes Natrium-Aluminiumsulfat und/oder Perlite, ge­ tränkt mit Eisen-II- und Eisen-III-Salzen. Es können auch weiterhin als Eisensalze Doppel­ salze wie Eisen-II- oder Eisen-III-Ammonium­ sulfate Anwendung finden, zusätzlich werden bei der Tränkung den Eisensalzen Calciumchlorid­ dihydrat zur Feuchtehaltung der Sorptionsschicht zugegeben. Ebenfalls können zur Pufferung und pH-Wert-Konstanz mehrbasische Carbonsäuren Anwendung finden;
  • Alle Massen haben einen pH-Wert, der im Bereich von pH 0,5-1,5 liegt;
  • Mit (5) ist die Chemisorptionsschicht bezeichnet, die die Masse wie unter (3) beschrieben (alkalisch, pH <12) enthält.
  • Mit (6) ist eine neutrale Sorptionsschicht dargestellt, die vorzugsweise aus Aktiv-Kohle besteht.
  • Mit (7) ist eine dem Chemisorptionsfilter nachgeschaltete Hochleistungsfeinstaub-Filterschicht dargestellt.
  • Mit (8) ist der Reinluftaustritt des Chemisorptions­ filters dargestellt.
1. Process for the separation of acidic, basic or neutral reacting organic or inorganic, with dust, bacteria, viruses, mites, pollen, fungi, etc. breathing air including tobacco smoke from the breathing air, characterized in that according to the invention a multi-layer chemisorption filter is used , which according to the invention is constructed in a suitable manner in the following layer sequence:
  • With ( 1 ) the air inlet of the chemisorption filter is shown;
  • with ( 2 ) the high-performance fine dust filter layer upstream of the chemisorption filter;
  • with ( 3 ) an alkaline chemisorption layer consisting of turf iron ore (FeOOH), bloated bodies with a very large surface area, preferably a bloated sodium aluminum sulfate and / or perlite impregnated with sodium or potassium carbonate or a mixture thereof or soda lime.
    All masses have a pH value that is in the range of pH <12.
  • With ( 4 ) the following sorption layer is referred to, which consists of expanded bodies with a very large surface area, preferably an expanded sodium aluminum sulfate and / or perlite, impregnated with iron (II) and iron (III) salts. Double salts such as iron (II) or iron (III) ammonium sulfates can also continue to be used as iron salts; in addition, calcium chloride dihydrate is added to the iron salts to keep the sorption layer moist. Polybasic carboxylic acids can also be used for buffering and pH stability;
  • All masses have a pH in the range of pH 0.5-1.5;
  • ( 5 ) denotes the chemisorption layer which contains the mass as described under ( 3 ) (alkaline, pH <12).
  • With ( 6 ) a neutral sorption layer is shown, which preferably consists of activated carbon.
  • ( 7 ) shows a high-performance fine dust filter layer connected downstream of the chemisorption filter.
  • With ( 8 ) the clean air outlet of the chemisorption filter is shown.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß den Eisenmassen der Chemisorptionsschicht (4) bei der Tränkung zusätzlich Calciumchloriddihydrat zugegeben wird, um einen bestimmten Feuchtegehalt der Massen und die Leistungsfähigkeit zu erhalten.2. The method according to claim 1, characterized in that the iron masses of the chemisorption layer ( 4 ) during the impregnation additionally calcium chloride dihydrate is added to obtain a certain moisture content of the masses and the performance. 3. Verfahren nach Anspruch 1-2, dadurch gekennzeichnet, daß den Eisenmassen der Chemisorptionsschicht (4) bei der Tränkung zusätzlich mehrbasische Carbonsäuren zu­ gegeben werden, um eine erwünschte Pufferung und den vorgegebenen pH-Wert in der Masse zu erhalten.3. The method according to claim 1-2, characterized in that the iron masses of the chemisorption layer ( 4 ) in the impregnation additionally polybasic carboxylic acids are added to obtain a desired buffering and the predetermined pH in the mass. 4. Verfahren nach Anspruch 1-3, dadurch gekennzeichnet, daß durch die bewußte erfindungsgemäß gewählte Chemi­ sorptions-Schichtenfolge in der Wechselwirkung mit den spezifisch eingestellten pH-Werten der einzelnen Schichten
  • Schicht (3) alkalisch pH < 12
  • Schicht (4) sauer pH 0,5-1,5
  • Schicht (5) alkalisch pH 12-13
  • Schicht (6) neutral
4. The method according to claim 1-3, characterized in that by the deliberate Chemi sorption layer sequence according to the invention in the interaction with the specifically adjusted pH values of the individual layers
  • Layer ( 3 ) alkaline pH <12
  • Layer ( 4 ) acidic pH 0.5-1.5
  • Layer ( 5 ) alkaline pH 12-13
  • Layer ( 6 ) neutral
und unter Berücksichtigung der Stoff- und Reagenzien­ auswahl nicht nur sauer oder basisch reagierende organische bzw. anorganische Schadstoffe neben Kohlen­ wasserstoffen und Tabakrausch abgeschieden werden, sondern auch gleichzeitig eine bakterizide Wirkung erreicht wird, indem Bazillen, Viren und Pilze abgetötet und zurück­ gehalten werden.and taking into account the substances and reagents selection not only acidic or alkaline organic or inorganic pollutants in addition to coal Hydrogen and tobacco frenzy are separated, but a bactericidal effect is also achieved at the same time, by killing bacilli, viruses and fungi and back being held. 5. Verfahren nach Anspruch 1-4, dadurch gekennzeichnet, daß am Chemisorptionsfilterein- und Ausgang eine Hochleistungs-Feinstaubabweisende-Filterschicht angeordnet ist.5. The method according to claim 1-4, characterized in that at the chemisorption filter inlet and outlet a High-performance fine dust-repellent filter layer is arranged.
DE19873703137 1987-02-03 1987-02-03 Multiply active bactericidal/fungicidal chemisorption filter for treating breathing air, in particular for allergic people Granted DE3703137A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873703137 DE3703137A1 (en) 1987-02-03 1987-02-03 Multiply active bactericidal/fungicidal chemisorption filter for treating breathing air, in particular for allergic people

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873703137 DE3703137A1 (en) 1987-02-03 1987-02-03 Multiply active bactericidal/fungicidal chemisorption filter for treating breathing air, in particular for allergic people

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DE3703137A1 true DE3703137A1 (en) 1988-08-18
DE3703137C2 DE3703137C2 (en) 1991-02-07

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DE3818993A1 (en) * 1988-06-03 1990-02-08 Hasso Von Bluecher System for cleaning up polluted rooms
DE3941899A1 (en) * 1989-12-19 1991-06-20 Kessler & Luch Gmbh AIR PERFORMANCE WITH FILTER
DE4015506A1 (en) * 1990-05-15 1991-11-21 Hanns Rump High quality air prodn. using multiple filter - having mechanical, noble metal coated and varying pH filter elements, pref. with monitor and warning system
EP0467526A2 (en) * 1990-07-16 1992-01-22 Sakai Chemical Industry Co., Ltd., Method for ozone decomposition
WO1992000772A1 (en) * 1990-07-06 1992-01-23 Edwin Leonard Head A biological electronic oxygen activator
EP0672445A1 (en) * 1992-12-02 1995-09-20 Ebara-Infilco Co., Ltd. Method and apparatus for preventing contamination of substrate or substrate surface
BE1007983A3 (en) * 1994-04-29 1995-12-05 Zaudig Daniel Marcel Fernand Purifying air filter for fresh and salt water aquariums that can be used inaquaculture
EP0736403A2 (en) * 1995-04-06 1996-10-09 Behr GmbH & Co. Method and device for treating an airstream delivered to an interior
DE19631098A1 (en) * 1996-08-01 1998-02-05 Wimmer Ulrich Dipl Ing Fh Moistened paper air filter for removal of dust and chemicals
DE19652688A1 (en) * 1996-12-18 1998-06-25 Kurt Tillmanns Method and device for the purest filtering and disinfection of air
WO1998056489A1 (en) * 1997-06-13 1998-12-17 Hoelter Heinz Ionisation filter for purifying air
US6340381B1 (en) * 1991-12-02 2002-01-22 Ebara Research Co., Ltd. Method and apparatus for the preparation of clean gases
CN101696037B (en) * 2009-11-05 2012-01-04 中国烟草总公司郑州烟草研究院 Beta-FeOOH particles, preparation method and application thereof
US9284200B2 (en) * 2008-08-13 2016-03-15 Contech Engineered Solutions LLC Thermally treated expanded perlite
CN105935538A (en) * 2016-06-06 2016-09-14 浙江文国重工机械有限公司 Method for removal of dioxin from industrial waste cracking burning tail gas

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DE4406813C2 (en) * 1994-03-02 1998-09-03 Hoelter Heinz Filters for the separation of allergens
CN103566737B (en) * 2013-10-15 2015-07-15 大连北方成套教学设备有限公司 Double purification system for chemical experiment waste gas

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US9284200B2 (en) * 2008-08-13 2016-03-15 Contech Engineered Solutions LLC Thermally treated expanded perlite
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