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WO2025149666A1 - Système de purification d'air à principe de contre-courant et procédé de purification d'air - Google Patents

Système de purification d'air à principe de contre-courant et procédé de purification d'air

Info

Publication number
WO2025149666A1
WO2025149666A1 PCT/EP2025/050617 EP2025050617W WO2025149666A1 WO 2025149666 A1 WO2025149666 A1 WO 2025149666A1 EP 2025050617 W EP2025050617 W EP 2025050617W WO 2025149666 A1 WO2025149666 A1 WO 2025149666A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
filter chamber
water
spray
polluted
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
PCT/EP2025/050617
Other languages
English (en)
Inventor
Marcel Pierre ZAHLEN
Dominik ZAHLEN
Andreas Wartha
Jakob Schneider
Jörg Lehmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2025149666A1 publication Critical patent/WO2025149666A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/14—Packed scrubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/04—Regenerating the washing fluid
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents

Definitions

  • the present invention relates to air cleaning systems according to claim 1 and an air cleaning method according to claim 11 .
  • Air cleaning systems are integral components in various industries, particularly in manufacturing and production processes that generate polluted exhaust air. These systems are designed to filter and purify the air, removing harmful substances such as gases, aerosols, fine particles, and volatile organic compounds (VOCs).
  • the pollutants can be classified into inorganic and organic pollutants, following a classification adapted from the World Health Organization (WHO).
  • WHO World Health Organization
  • Air washing or air scrubbing One common method for exhaust air purification is air washing or air scrubbing. This process involves the separation of fine dust, odors, germs, and water-soluble or water-binding substances from the exhaust air. The pollutants are collected in contaminated water, which is then disposed of. Air washers are widely used in ventilation systems and are particularly relevant in industries such as paint and varnish manufacturing, where high loads of health-hazardous and dangerous substances can be present in the exhaust air.
  • Ultrafiltration Another prevalent method for exhaust air purification is ultrafiltration. This physical separation process uses semipermeable membranes to retain particles and molecules of a specific size. Ultrafiltration is versatile and can be used in various areas, including water treatment, food industry, biotechnology, medicine, and pharmacy. However, an air washer with ultrafiltration is generally not capable of removing gaseous pollutants such as carbon monoxide or carbon dioxide. Despite the effectiveness of these methods, they have several limitations. For instance, air washers have high water consumption, produce relatively large droplets limiting absorption capacity, and have high pressure loss. Furthermore, the affinity of water can limit substance absorption as water can bind to specific amounts. On the other hand, ultrafiltration systems require regular maintenance and replacement of the membranes, adding to the operational costs.
  • the present system in comparison to the "XYZ Air Cleaning System" (U.S. Patent No. 12345678), the present system, as per claim 1 , introduces a filter chamber with a filler material and a spray system that sprays water onto the filter chamber from a top side. This configuration allows the spray water to move at least partially against the direction of the air in the duct through the filter chamber, which is a distinct approach from the "XYZ Air Cleaning System".
  • the Surface of the filler material is preferably provided to mediate adsorption of pollutants such as VOCs into the spray water that travels through the filter chamber.
  • pollutants such as VOCs
  • the transition of pollutants from the air into the water is enhanced in a basic liquid environment of the spray water.
  • the system also includes a spray system with at least one nozzle, configured to spray water onto the filter chamber from a top side such that the spray water moves at least partially against the direction of the air in the duct through the filter chamber.
  • the nozzle is arranged behind the filter chamber and may be physically or bodily arranged above the same.
  • the system may include one or more of the following features.
  • the filler material in the filter chamber may be quartz gravel.
  • the filter chamber may comprise at least one perforated sheet or other suitable material permeable to air above and below the filler material to hold the same in place. At least one of the perforated sheets, the top perforated sheet, may be coated with TiO2 on the side oriented towards the filler material. These perforated sheets serve to hold the filler material in place, ensuring that it remains within the filter chamber and continues to effectively filter the polluted air.
  • the air duct may comprise a geometrically shaped section or upwardly directed section in which the polluted air is required to stream upwards (geometrically ascending /upwardly directed section) through the filter chamber (upwards directed section) wherein a waste water collection area may be arranged at a point of the air duct that is localized before the filter chamber such that waste water from the filter chamber reaches the waste water collection area.
  • the waste water collection area may be located in a branch of the air duct or connected to the air duct such that it is fl uidically connected to the air duct or is a sink/dip/drain section that is attached to the actual air duct or part of it.
  • a drainage for water from the filter chamber In a bottom region of the “U-shaped section” or attached to it, a drainage for water from the filter chamber. This drainage system collects the water from the filter chamber that contains the pollutants removed from the cleaned air.
  • the regenerative water circulation system may comprise a cyclone or other vortex forming means or high-pressure nozzle adapted to reduce the surface tension of the water by flow-dynamic treatment before the water is forwarded to the spray system.
  • Fig. 1 is a sectional view of an air cleaning system integrating elements for purifying polluted exhaust air.
  • the polluted air and the spray water (12) passing through the filter chamber (9) are provided to move in opposite directions.
  • This counterflow arrangement enhances the contact between the water and the polluted air, thereby improving the efficiency of the pollutant removal process.
  • the setup illustrated in Fig. 4 is specifically designed for environments such as the food industry, where grease aerosols are prevalent in the polluted air. Unlike the system shown in Fig. 1 , this version does not include the addition of hydrogen peroxide in the pretreatment stage.
  • the system begins with ionization and ozonation of the incoming polluted air, which helps to break down grease particles and other contaminants.
  • the air then moves through the prefilter (6), which captures additional particulates.
  • the core of the system is the filter chamber, where spray nozzles apply (preconditioned) water in a counterflow to the upward-moving air, effectively washing away the grease aerosols.
  • the purified air exits the system after passing through a droplet separator with a demister, ensuring that it is free from any remaining aerosols or droplets.
  • the system is provided with a pretreatment unit (3,4,5) adapted to expose polluted air (1) to at least one of Ionizing radiation, such as UV-light (3), and/or ozone (4) and/or hydrogen peroxide (5) before the polluted air reaches the filter chamber (9).
  • This pretreatment can help to break down or transform the pollutants into less harmful substances before they come into contact with the water in the filter chamber (9).
  • a prefilter element is arranged behind the pretreatment unit (3, 4, 5) provided as a reaction surface for the polluted air and the pretreatment agents before the polluted air reached the filter chamber. This arrangement can enhance the efficiency of the pollutant removal process by providing a large surface area and/or a catalytic surface for the interaction between the polluted air and the pretreatment agents.
  • the filter chamber (9) may comprise at least one perforated sheet above and below the filler material to hold the same in place. These perforated sheets can help to ensure that the filler material remains in the filter chamber (9) during the air cleaning process.
  • the perforated sheets may be made of a material that is capable of withstanding the conditions within the filter chamber (9), such as high temperatures, high pressures, and exposure to various pollutants. The perforations in the sheets can allow the polluted air and the spray water to pass through while preventing the filler material from escaping the filter chamber (9).
  • the method of cleaning a body of polluted air (1) involves sending the polluted air through an air duct (2) which comprises a filter chamber (9) arranged in the air duct.
  • the filter chamber comprises a filler material for the polluted air to pass through.
  • a spray system with at least one nozzle (8) is provided, through which water (12) is sprayed onto the filter chamber (9) from a top side.
  • the nozzle is arranged behind the filter chamber and is physically or bodily arranged above the same such that the spray water is rippled at least partially against the direction of the polluted air in the duct through the filter chamber (9).
  • This counterflow arrangement enhances the contact between the water and the polluted air, thereby improving the efficiency of the pollutant removal process.
  • the method of cleaning a body of polluted air (1) involves sending the polluted air through an air duct (2) which comprises a filter chamber (9) arranged in the air duct (2).
  • the filter chamber comprises a filler material for the polluted air to pass through.
  • the nozzle is arranged behind the filter chamber and is physically or bodily arranged above the same such that the spray water is rippled at least partially against the direction of the polluted air in the duct through the filter chamber (9). This counterflow arrangement enhances the contact between the water and the polluted air, thereby improving the efficiency of the pollutant removal process.
  • the method includes the step of collecting the water that passes through the filter chamber (9) and recycling it for reuse via the spray system. This recycling process can help to conserve water resources and reduce the operational costs of the air cleaning system.
  • the recycling of the collected water includes the step of reducing the water's surface tension via a flow-dynamic treatment.
  • This flow-dynamic treatment can enhance the interaction between the water and the polluted air, thereby improving the efficiency of the pollutant removal process.
  • the air passes through a TiO2 absorption material (10) that is irradiated with UV-radiation (11) before being released. This additional cleaning stage can help to further cleanse the air before it is deemed clean and released (16).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

L'invention concerne un système de purification d'air comprenant un conduit d'air pour faire passer de l'air d'échappement pollué, une chambre de filtration agencée dans le conduit d'air, et un système de pulvérisation avec au moins une buse. La chambre de filtration contient un matériau de remplissage pour le passage de l'air pollué. Le système de pulvérisation pulvérise de l'eau sur la chambre de filtration à partir d'un côté supérieur. La buse est agencée derrière la chambre de filtration et agencée physiquement au-dessus de celle-ci, permettant à l'eau de pulvérisation de se déplacer au moins partiellement contre la direction de l'air dans le conduit à travers la chambre de filtration. Le système peut également comprendre un système de circulation d'eau régénérative raccordé au drainage pour recycler l'eau de pulvérisation pour une utilisation ultérieure par le système de pulvérisation.
PCT/EP2025/050617 2024-01-11 2025-01-11 Système de purification d'air à principe de contre-courant et procédé de purification d'air Pending WO2025149666A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP24151287 2024-01-11
EP24151287.0 2024-01-11

Publications (1)

Publication Number Publication Date
WO2025149666A1 true WO2025149666A1 (fr) 2025-07-17

Family

ID=89619892

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/050617 Pending WO2025149666A1 (fr) 2024-01-11 2025-01-11 Système de purification d'air à principe de contre-courant et procédé de purification d'air

Country Status (1)

Country Link
WO (1) WO2025149666A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130069447A (ko) * 2011-12-16 2013-06-26 가부시키가이샤 히타치플랜트테크놀로지 폐수 중의 1,4-디옥산의 처리 방법 및 그 장치
CN109012115A (zh) * 2018-08-03 2018-12-18 中节能（连云港）清洁技术发展有限公司 一种有机废物储存仓库废气处理方法
US20190160395A1 (en) * 2017-11-28 2019-05-30 Csub Auxiliary For Sponsored Programs Administration Apparatus and Process for Removal of Carbon Dioxide from a Gas Flow and Treatment of Brine/Waste Water from Oil Fields
EP3503996A1 (fr) 2016-08-24 2019-07-03 Emco Water Patent GmbH Dispositif présentant un système de réacteur, procédé pour le traitement électrolytique fluidiquement dynamique de milieux fluides ou gazeux ou de mélanges de ceux-ci dans le système de réacteur et utilisation du dispositif et du procédé
EP3503995A1 (fr) 2016-08-24 2019-07-03 Emco Water Patent GmbH Dispositif de production optimisée en termes d'énergie de turbulences fluidiques dans une chambre réactionnelle
WO2022032600A1 (fr) * 2020-08-11 2022-02-17 苏州荣能环保科技有限公司 Tour de lavage par l'eau pour gaz résiduaire

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130069447A (ko) * 2011-12-16 2013-06-26 가부시키가이샤 히타치플랜트테크놀로지 폐수 중의 1,4-디옥산의 처리 방법 및 그 장치
EP3503996A1 (fr) 2016-08-24 2019-07-03 Emco Water Patent GmbH Dispositif présentant un système de réacteur, procédé pour le traitement électrolytique fluidiquement dynamique de milieux fluides ou gazeux ou de mélanges de ceux-ci dans le système de réacteur et utilisation du dispositif et du procédé
EP3503995A1 (fr) 2016-08-24 2019-07-03 Emco Water Patent GmbH Dispositif de production optimisée en termes d'énergie de turbulences fluidiques dans une chambre réactionnelle
US20190160395A1 (en) * 2017-11-28 2019-05-30 Csub Auxiliary For Sponsored Programs Administration Apparatus and Process for Removal of Carbon Dioxide from a Gas Flow and Treatment of Brine/Waste Water from Oil Fields
CN109012115A (zh) * 2018-08-03 2018-12-18 中节能（连云港）清洁技术发展有限公司 一种有机废物储存仓库废气处理方法
WO2022032600A1 (fr) * 2020-08-11 2022-02-17 苏州荣能环保科技有限公司 Tour de lavage par l'eau pour gaz résiduaire

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