EP2104549A1 - Système permettant de décomposer des substances odorantes dans l'air et utilisation du produit résiduel de cette décomposition - Google Patents

Système permettant de décomposer des substances odorantes dans l'air et utilisation du produit résiduel de cette décomposition

Info

Publication number
EP2104549A1
EP2104549A1 EP07785736A EP07785736A EP2104549A1 EP 2104549 A1 EP2104549 A1 EP 2104549A1 EP 07785736 A EP07785736 A EP 07785736A EP 07785736 A EP07785736 A EP 07785736A EP 2104549 A1 EP2104549 A1 EP 2104549A1
Authority
EP
European Patent Office
Prior art keywords
air
cleaning system
zone
filter
air cleaning
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Withdrawn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
EP07785736A
Other languages
German (de)
English (en)
Inventor
Preben Staehr
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.)
Munters AS
Original Assignee
Turbovent Environment AS
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 Turbovent Environment AS filed Critical Turbovent Environment AS
Publication of EP2104549A1 publication Critical patent/EP2104549A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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

Definitions

  • the invention relates to a system for decomposing smelling substances in air, such as stable air in pig stables, said stable air being sucked out from the stable via an air channel to an air cleaning system, as well as use of the filtered part.
  • an air cleaning device which, as stated in claim 1 , comprises a substantially vertical channel in whose lower part a wetting zone having downwardly directed water mist nozzles is provided, and wherein a biological filter zone is provided above the wetting zone, said biological filter zone comprising filter elements disposed after each other with spaces between the individual filter elements, and wherein a centrifugal blower is present at the top in the substantially vertical channel, said centrifugal blower having the suction side facing downwards and forming, together with an expanded upper part of the channel, a separation zone for separating the water from the air, and wherein the channel has a discharge opening for the dried and cleaned air above the centrifugal blower.
  • This structure of the system completely avoids mechanical filters for the separation of particles, as the particles are removed by suspension in the water mist formed. Accordingly, there are solely biological filters in the system, and not only a more effective removal of the odour is achieved, but also a more effective separation of the particles. Relatively much water is used, since water is employed not only for wetting the faces of the filters, but also for the water mist which suspends the solid particles. This water, however, is separated without problems in the separation zone at the top of the system, where the centrifugal blower, which ensures the transport of the air through the system, throws the water out against a cylindrical wall. The separated water percolates along the sides in the vertical channel and is collected in a sedimentation system, from which the water is recycled in an ordinary manner to form water mist.
  • bacteria cultivated in order to "eat" the odour can reduce the odour nuisances in a simple and effective manner.
  • This biological process results in a growth substance on the biological filter elements which is nitrogenous, and which may advantageously be used as a nitrogenous fertilizer supplement.
  • rows of downwardly directed water mist nozzles are arranged in the spaces between the individual elements of the filter zone. This ensures that particles may be suspended during the entire course of the upward flow of the air. At the same time, these nozzles serve to wet the surfaces on the biological filters.
  • the filter is composed of a plurality of juxtaposed lengths of pipe of a net-like structure and these are assembled into a disc-shaped element, favourable conditions of growth are created on the large growth surface.
  • a scraper device is mounted above each filter element, the surface may be scraped in an effective manner to maintain the conditions of the growth on the elements.
  • the liquid running away from the system and the biological biomass are treated in a separation system, cleaning system, the liquid may be recycled in the system, while the filtered material may be separated.
  • fig. 1 shows a partially sectional view of a system seen from the side
  • fig. 2 shows a biological filter element seen from above. Description of an exemplary embodiment
  • a system according to the invention for use in the decomposition of smelling substances in air will be described first, and then the mode of operation will be described.
  • Figure 1 shows a system 1 which is shown mounted outside a building 2, which may e.g. be a pig stable.
  • An air channel 2a conveys the stable air 3 into a wetting zone 4 at the bottom in the system 1 , where liquid is supplied via nozzles on a pipeline 5 to form a water mist 10.
  • This water mist 10 serves to suck and trap, respectively, gaseous and solid particles in the air.
  • Agents for conditioning the air may be added to the liquid, such as acid to regulate the pH value.
  • a water mist 10 is likewise supplied to this filtration zone via nozzles on supply pipes 5, as shown.
  • the individual filter elements 6 are shown seen from above in fig. 2.
  • the elements 6 are composed of objects, which are tubular in the example shown. These lengths of pipe 6a typically have the same dimension and are juxtaposed to form a continuous filter element 6. They are made of a net-shaped mesh material to form a large surface.
  • the net structure means that supplied or added bacteria obtain a large filter face to grow on, and when the individual lengths of pipe 6a are mounted obliquely relative to the filter face, the flow area will be increased.
  • the direction of flow 7 of the air up through the filter zone is changed through the individual filter elements, so that the efficiency is maximum owing to the increased contact time of the air.
  • Bacteria may grow on the surfaces of the filters by "eating" the smelling substances in the air saturated by water mist and thereby produce a growth material 6b, as indicated on a few of the lengths of pipe 6a in fig. 2.
  • liquid mist 10 can flush growth material away from the filter material and thus flush the biological growth material away from the filter element, when the material has reached such an extent that the air flow is reduced.
  • This material may be collected together with the liquid at the bottom of the system, in which an inclined bottom 13 is mounted, where the material flushed off may be collected in a separation system 15A and 16A, as shown in fig. 1.
  • a scraper device may be arranged above one or more of the filter elements 6 in the form of a scraper blade 9, which will be able to scrape off the growth material from the elements 6 via a through shaft 8, as shown in fig. 1.
  • a liquid separation zone 22 is established at the top of the system 1 , where a centrifugal blower (not shown) is mounted.
  • This blower sucks the stable air 3 through the system 1 via a funnel 11 at the top and discharges the cleaned air at the top.
  • the liquid will be precipitated in the separation zone by centrifugation of the air drawn in.
  • the liquid will run down via the openings 12 in the funnel 11 , while the dry and clean air 23 will be discharged at the top.
  • the cleaning zone comprises a discharge pipe 15 which conveys liquid and material to a sedimentation tank 15A, in which liquid will run via an overflow
  • the material precipitated in the tank 16A is discharged via a channel as a material 21 which, owing to its high content of nitrogen, may be utilized as a fertilizer.
  • the system may be dimensioned for an admitted air amount of 30,000 m 3 per hour.
  • the channel diameter may be about 1 ,500 mm, and the air flow velocity about 4.5 m per second.
  • the water mist may be derived from about 470 I per hour, while the filter surface in total may be about 320 m 2 .
  • the total height of the system may be about 8.5 m.
  • Stable air 3 is sucked out by the blower in the separation zone 22 in the system via a channel 2a, which connects the stable 2 with the system 1.
  • the air is conveyed into a wetting zone 4, in which a water mist 10 absorbs the water-soluble parts and binds dust particles, etc.
  • the wetted air 7 is passed through one or more biological filters 6, which are seeded with or is supplied with bacteria via the liquid 10, which are capable of "eating" the odour and thereby removing smelling substances from the passing air 7.
  • the growth material on the filters 6 may be flushed or scraped off in order to be removed from the filter surface and drop down to the bottom of the system, from which it may be conveyed to a separation and cleaning sys- tern 15A and 16A at the bottom.
  • Liquid may be taken from there for re-use in the nozzles, while the residual material is discharged for use as a fertilizer.
  • the invention is described in connection with a pig stable, but, of course, the system can operate in a quite corresponding manner for the removal of odour from other sources, such as cleaning systems, bone meal factories and similar odour-emitting facilities.
  • the shown and described exemplary embodiment relates to an upright air cleaner, but, of course, it will also be possible to mount it in an inclined position, where this is appropriate. Access for inspection of the bio-filter will thus be facilitated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fertilizers (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

Selon cette invention, l'air, tel qu'un air stable, peut être épuré de ses composants odorants désagréables au moyen d'un système dans lequel l'air est d'abord humidifié (4) puis transporté vers des filtres biologiques (6), dans lesquels des bactéries 'mangent' les substances odorantes, et il est ensuite centrifugé de façon à séparer le liquide de l'air (7). L'air sec peut ensuite être évacué sous forme d'air épuré (23).
EP07785736A 2006-08-16 2007-08-13 Système permettant de décomposer des substances odorantes dans l'air et utilisation du produit résiduel de cette décomposition Withdrawn EP2104549A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200601068A DK177020B1 (da) 2006-08-16 2006-08-16 Anlæg til nedbrydning af lugtstoffer i luft samt anvendelse af restproduktet fra nedbrydningen
PCT/DK2007/000372 WO2008019687A1 (fr) 2006-08-16 2007-08-13 Système permettant de décomposer des substances odorantes dans l'air et utilisation du produit résiduel de cette décomposition

Publications (1)

Publication Number Publication Date
EP2104549A1 true EP2104549A1 (fr) 2009-09-30

Family

ID=38654590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07785736A Withdrawn EP2104549A1 (fr) 2006-08-16 2007-08-13 Système permettant de décomposer des substances odorantes dans l'air et utilisation du produit résiduel de cette décomposition

Country Status (3)

Country Link
EP (1) EP2104549A1 (fr)
DK (1) DK177020B1 (fr)
WO (1) WO2008019687A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108744950A (zh) * 2018-07-12 2018-11-06 江苏俊镕环保设备有限公司 一种基于生化敏化填料床的含尘有机废气处理装置
CN111001253B (zh) * 2019-12-24 2021-06-15 扬州工业职业技术学院 一种智能型电气自动化除尘装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807033A1 (de) * 1988-03-04 1989-09-14 Aloys Prof Dr Huettermann Verfahren zum dekontaminieren von sauerstoffhaltigen gasen, insbesondere von abgasen
DE3903409C1 (fr) * 1989-02-02 1990-05-23 Wilhelm Prof. Dr.Phil. 1000 Berlin De Ripl
DE9203062U1 (fr) * 1992-03-09 1993-07-15 Schoenhammer, Johann, 8317 Mengkofen, De
US5236677A (en) * 1992-03-13 1993-08-17 Grupo Cydsa S.A. De C.V. Biological process for the elimination of sulphur compounds present in gas mixtures
JPH11169654A (ja) * 1997-12-17 1999-06-29 Toyo Dynam Kk 循環式微生物脱臭装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008019687A1 *

Also Published As

Publication number Publication date
WO2008019687A1 (fr) 2008-02-21
DK177020B1 (da) 2011-01-24
DK200601068A (da) 2008-02-17

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