EP1847647A1 - panneau purificateur d'air - Google Patents

panneau purificateur d'air Download PDF

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Publication number
EP1847647A1
EP1847647A1 EP06112719A EP06112719A EP1847647A1 EP 1847647 A1 EP1847647 A1 EP 1847647A1 EP 06112719 A EP06112719 A EP 06112719A EP 06112719 A EP06112719 A EP 06112719A EP 1847647 A1 EP1847647 A1 EP 1847647A1
Authority
EP
European Patent Office
Prior art keywords
air purifying
panel according
panel
slag
purifying panel
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Withdrawn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
EP06112719A
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German (de)
English (en)
Inventor
J. Steketee
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.)
Tauw BV
Original Assignee
Tauw BV
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 Tauw BV filed Critical Tauw BV
Priority to EP06112719A priority Critical patent/EP1847647A1/fr
Publication of EP1847647A1 publication Critical patent/EP1847647A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/02—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic specially adapted for sustaining vegetation or for accommodating plants ; Embankment-type or crib-type noise barriers; Retaining walls specially adapted to absorb or reflect noise
    • E01F8/021—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic specially adapted for sustaining vegetation or for accommodating plants ; Embankment-type or crib-type noise barriers; Retaining walls specially adapted to absorb or reflect noise with integral support structure
    • E01F8/025—Gabion-type
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water

Definitions

  • the present invention relates to a air purifying panel capable of removing noxious gases that are present in the atmosphere.
  • the air purifying panel is also capable of adsorbing and filtering soot and dust particles from the atmosphere.
  • the air purifying panel has also road sound absorbing capacity.
  • Pavement and concrete structures comprising a photocatalytic material, e.g. titanium dioxide, capable of removing nitrogen oxides, in particular NO x , from the atmosphere, are well known in the art.
  • a photocatalytic material e.g. titanium dioxide
  • nitrogen oxides in particular NO x
  • such structures are not suitable for removing other noxious gases such as sulphur dioxide from the atmosphere.
  • such structures have a low activity under dusky and dark conditions.
  • JP 11061708 discloses a NO x -removing concrete product comprising inorganic material members that are coated with the photocatalyst titanium oxide.
  • the inorganic material members may be selected from a wide range of materials having different properties, e.g. blast furnace slag. However, due to titanium oxide coating, the inorganic material member is unlikely to have any catalytic effect. It may have a function in neutralizing the nitric acid which is formed upon the catalytic oxidation of NO x .
  • EP A 919.667 discloses a NO x -cleaning paving structure comprising a surface layer, said surface layer comprising titanium oxide and optionally a blast surface slag.
  • the blast surface slag is added as a powder and acts as a pozzolan material, which promotes the hardening of the paving structure.
  • Slag e.g. blast furnace slag
  • Slag is a waste material consisting of basic metal oxides as main components and is used in industrial purification processes of exhaust gases, in particular for removing nitrogen oxides and sulphur oxides.
  • JP 52050985 discloses a dry process for the simultaneous removal of SO x and NO x by using slag as adsorbent.
  • JP 52094862 discloses a process for the removal of SO x and NO x by using waste materials such as waste sand, converter slag, supola slag or red mud (a material comprising aluminium oxide, iron oxide and silicon oxide as main components).
  • JP 1284324 disclose the a process for simultaneously removing SO x and NO x from a gas by passing the gas through a bed packed with a moulded composition comprising Fe2O3 and granulated slag consisting of 41 - 43 % CaO, 32 - 34 % SiO 2 , 13 - 16 % Al 2 O 3 , 5 - 8 % MgO, 0.4 - 0.6 % MnO, 0.2 - 0.7 % FeO and 0.8 - 0.1 % S as a carrier.
  • US 4.073.864 discloses the use of an aqueous suspension of pulverized blast furnace slag principally composed of Ca 2 Al 2 SiO 7 for the removal of sulphur dioxide from exhaust gas.
  • such industrial processes are conducted under relatively severe conditions, e.g. high temperatures.
  • exhaust gases comprise relatively high amounts of noxious gases.
  • Sound absorbing panels comprising a photocatalyst for removing NO x from the atmosphere are also known in the art.
  • JP 2000257185 discloses a sound absorbing panel comprising a metal plate provided with a plurality of openings, the metal plate being supported by a metal structure, wherein a cloth-like sound absorbing material carrying a photocatalyst is arranged between the metal plate and the metal structure.
  • light is provided by lamps.
  • JP 2000262864 discloses a sound insulating wall comprising plates that are coated with a photocatalyst.
  • the present invention relates to a air purifying panel comprising a plurality of porous bodies comprising a slag material selected from the group consisting of blast furnace slag, steel slag and MSW/MSWI bottom ash.
  • the present invention further relates to the use of the air purifying panel for removing noxious gases, soot and dust particles from the atmosphere.
  • the present invention relates to a process for removing noxious gases, soot and dust particles from the atmosphere, wherein the panel according to the invention is contacted with noxious gases, soot and dust particles containing atmosphere.
  • the porous bodies comprising the slag material may have various embodiments.
  • the porous body may comprise a solid porous body that is formed from an adhesive or binding material such as concrete or mortar. By varying the ratio of binding material and slag, a more or less loose structure is obtained.
  • the porous body comprises a hollow body having a gauzy or grid-shaped surface.
  • These hollow bodies are preferably manufactured from a durable material such as steel, preferably stainless steel, or synthetic polymeric materials.
  • the hollow bodies could be made of bricks or concrete with interspacings.
  • the grid-shaped surface has preferably a plaiting wherein the openings may have various forms, e.g. square or hexagonal.
  • the mesh size of the grid-shaped surface has a mesh size of 10 to 100 mm, that is that the diameter of the openings is 10 to 100 mm.
  • the size of the bodies may vary as well as will be apparent to the person skilled in the art.
  • a suitable size is a length of about 2 m, a width of about 1 m and a depth of about 0.5 m.
  • the porous bodies may be cube-, box-, cylinder or cone-shaped.
  • the porous bodies are cube- or box shaped since these forms are more easily to stack to a plurality of bodies having a sufficient stability.
  • Porous body 1 having a box-like shape has a grid-like surface 2, wherein the grid-like surface 2 comprises a plurality of openings 3.
  • the porous body is provided with a plurality of slag material 4.
  • the slag material can be directly used in the form as delivered by the supplier. If necessary, sieving and crushing are applied to obtain an optimal grading of the material. The reactivity of the material increases if the specific surface area becomes larger. However, fine material causes clogging, so air will not flow through the construction. Furthermore, fine material will not be retained by the grid-like surface of the construction.
  • a preferred grading of the slag is 40 - 150 mm. A more preferred grading is 50 - 130 mm. However, other dimensions are obviously also possible, depending upon the mesh of the grid-shaped surface.
  • the slag material is shaped into other forms, e.g. bricks.
  • Forming the slag material into bricks enables a more easy stacking of the slag material, in particular when the bricks are piled upon one another in a compact fashion, e.g. as in brick walls.
  • the porosity can easily be regulated by piling or bricklaying the bricks with greater or smaller interspacings.
  • the bricks are bricklaid, wherein an adhesive material is used to increase the solidity of the bricklaid stacking of the bricks.
  • FIG. 2 This embodiment is illustrated in Figure 2, wherein porous body 1 having a box-like shape which has grid-like surface 2 comprising a plurality of openings 3 if filled with stack of a plurality of bricks 4 made from slag material.
  • this embodiment is less preferred since the specific surface is relatively small which reduces the efficiency of the removal of the noxious gases, soot and dust particles.
  • the air purifying panel may comprise a stacking of the slag material, that preferably is formed or shaped into bricks, wherein in front of the stacking, that is on the road-side of the stacking, the sound panel comprises a grid-like fence or screen.
  • the fence or screen has a grid-like surface as is described for the porous body.
  • the road sound panel may comprise more fences or screens, e.g. four, so that a box-like porous body is formed.
  • the porous body is formed by the stacked bricks themselves, wherein the porosity of the porous body can be adjusted by the interspaces between the bricks or paving stones. Additionally, the porous body can be filled with the slag material.
  • the air purifying panel comprises a mixture of a light weight carrier, preferably rock wool or glass wool, and slag material.
  • the mixture of the light weight carrier and the slag material is embodied in a hollow body having a gauzy or grid-shaped surface as described above.
  • Rock wool, glass wool and like materials have the advantage that they have good sound adsorbing properties.
  • the large specific surface area of the rock wool and glass wool will improve the capability of removing soot and dust particles by adsorption and filtering.
  • An important advantage of this embodiment is the light weight, so it can be used on places with little bearing capacity or in combination with existing constructions.
  • FIG. 3 shows a preferred embodiment of the present invention, wherein a porous body 1 having a box-like shape has a grid-like surface 2, wherein the grid-like surface 2 comprises a plurality of openings 3.
  • the porous body is provided with a mixture of rock wool 4 and slag 5. Combination of the porous bodies provides a panel with the required height and length.
  • the air purifying panel comprises plants. Plants have the advantage that they consume greenhouse gases such as carbon dioxide and that they produce oxygen. The leaf surface of the plants also contributes to the entrapping of fine dust and soot particles formed during combustion of diesel fuel.
  • the air purifying panel comprises means for draining and collecting rain water. Since the slag material converts noxious gases such as NO x into water soluble nitrite and nitrate, the latter can be removed from the air purifying panel by the rain water which is then drained to a sewer system, a treatment system or collected in a storage tank and used as a source for sprinkling water.
  • the air purifying panel may be provided with a sprinkler systems for sprinkling water on the panel and the slag material, wherein the water trickles through the slag material. This may be necessary if the panel is constructed in a dry place and cleaning by rain water does not take place or is insufficient.
  • Figure 4 shows a preferred embodiment of the invention including a means for draining rain water
  • Figure 5 shows the same preferred embodiment, but then with a sprinkler system.
  • the means for draining rain water is indicated by reference numerals 6 and 7, wherein reference numeral 6 indicates a collection system with a gutter and reference numeral 7 a storage tank.
  • the storage tank 7 is connected to a pumping means 8 which feeds the sprinkling system via pipe 11, wherein the sprinkling system comprises a sprinkling bar 10 comprising nozzles 11.
  • the air purifying panel comprises benthic algae.
  • the air purifying panel comprises a sprinkling system for sprinkling water as described above, naturally occurring algae will settle on the surfaces of the slag material.
  • the algae can be grafted onto the surface of the slag material.
  • the present invention also relates to a process for removing noxious gases, soot and dust particles from the atmosphere, wherein the panel according to the present invention is contacted with the noxious gases, soot and dust particles containing atmosphere.
  • a side, preferably a vertical side, of the panel is cooled, for example by cooling water or wind.
  • the advantage of cooling is that temperature gradients are established which promotes the circulation of air through the panel.
  • a side, preferably a vertical side or the top side of the panel is heated. This can be accomplished by selective positioning the panel, i.e. that at least one surface is intensively subjected by sunlight whereas the other sides are protected from sunlight, i.e. are in the shade.
  • the efficiency of the process diminishes after a certain period of time.
  • the efficiency can be restored by rinsing the panel and the slag material with water, which can conveniently be accomplished by natural rain fall or by spraying with collected rain water or fresh water.
  • the water can for example be divided over the panel by the sprinkling system.
  • the panel according to the present invention has also road sound absorbing capacity.
  • the invention therefore also relates to an air purifying panel having road sound absorbing capacity.
  • Table 2 shows that lowering the residence time at conditions comparable with Example 1, has a negligible effect on the removal efficiency.
  • Conditions Removal of NO 2 en NO after passage of a layer of steel slag of 18 cm thickness. Residence time 1,2 sec.
  • Table 2 NO 2 NO Concentration in (ppmv) 8 0,34 Concentration out (ppmv) ⁇ 0,01 0,05 Removal efficiency (%) >99,9 85

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Road Paving Structures (AREA)
EP06112719A 2006-04-18 2006-04-18 panneau purificateur d'air Withdrawn EP1847647A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06112719A EP1847647A1 (fr) 2006-04-18 2006-04-18 panneau purificateur d'air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06112719A EP1847647A1 (fr) 2006-04-18 2006-04-18 panneau purificateur d'air

Publications (1)

Publication Number Publication Date
EP1847647A1 true EP1847647A1 (fr) 2007-10-24

Family

ID=36968951

Family Applications (1)

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EP06112719A Withdrawn EP1847647A1 (fr) 2006-04-18 2006-04-18 panneau purificateur d'air

Country Status (1)

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EP (1) EP1847647A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102356735A (zh) * 2011-08-21 2012-02-22 陈国柱 立体水田
CN108699787A (zh) * 2016-03-04 2018-10-23 Omya国际股份公司 石笼、包括这种石笼的隔音壁以及用于执行这种石笼的方法
WO2020008482A1 (fr) * 2018-07-02 2020-01-09 Afv Acciaierie Beltrame S.P.A. Couche d'absorption et d'isolation acoustiques pour barrières anti-bruit
NO20220962A1 (no) * 2022-09-07 2024-03-08 Ecostrada As Ecostrada Ecomodul Miljøskjerm

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100374A1 (fr) * 1982-08-04 1984-02-15 David Rack Construction à plusieurs couches absorbant le son et étant couverte de plantes résistantes au remblai
DE3744216A1 (de) * 1987-12-24 1989-07-06 Paul Olschimke Laermschutzwand
DE3903618A1 (de) * 1989-02-08 1990-10-18 Unterlaender Roswitha Laermschutzwaende aus abfallprodukten
JPH1113025A (ja) * 1997-06-19 1999-01-19 Tetsuo Nishiyama 吸音板
JPH11323882A (ja) * 1998-05-11 1999-11-26 Hokuetsu:Kk ポーラスコンクリート部体
WO2001086070A1 (fr) * 2000-05-09 2001-11-15 Rockwool International A/S Ecrans antibruit, leurs composants et leur construction
FR2862670A1 (fr) * 2003-11-26 2005-05-27 Jean Marie Heitz Module phonique prefabrique pour mur antibruit, mur antibruit obtenu et procede de fabrication dudit mur antibruit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100374A1 (fr) * 1982-08-04 1984-02-15 David Rack Construction à plusieurs couches absorbant le son et étant couverte de plantes résistantes au remblai
DE3744216A1 (de) * 1987-12-24 1989-07-06 Paul Olschimke Laermschutzwand
DE3903618A1 (de) * 1989-02-08 1990-10-18 Unterlaender Roswitha Laermschutzwaende aus abfallprodukten
JPH1113025A (ja) * 1997-06-19 1999-01-19 Tetsuo Nishiyama 吸音板
JPH11323882A (ja) * 1998-05-11 1999-11-26 Hokuetsu:Kk ポーラスコンクリート部体
WO2001086070A1 (fr) * 2000-05-09 2001-11-15 Rockwool International A/S Ecrans antibruit, leurs composants et leur construction
FR2862670A1 (fr) * 2003-11-26 2005-05-27 Jean Marie Heitz Module phonique prefabrique pour mur antibruit, mur antibruit obtenu et procede de fabrication dudit mur antibruit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 04 30 April 1999 (1999-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102356735A (zh) * 2011-08-21 2012-02-22 陈国柱 立体水田
CN108699787A (zh) * 2016-03-04 2018-10-23 Omya国际股份公司 石笼、包括这种石笼的隔音壁以及用于执行这种石笼的方法
CN108699787B (zh) * 2016-03-04 2021-01-29 Omya国际股份公司 石笼、包括这种石笼的隔音壁以及用于执行这种石笼的方法
WO2020008482A1 (fr) * 2018-07-02 2020-01-09 Afv Acciaierie Beltrame S.P.A. Couche d'absorption et d'isolation acoustiques pour barrières anti-bruit
NO20220962A1 (no) * 2022-09-07 2024-03-08 Ecostrada As Ecostrada Ecomodul Miljøskjerm

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