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EP0039461A1 - Procédé et dispositif pour l'épuration de l'air usé - Google Patents

Procédé et dispositif pour l'épuration de l'air usé Download PDF

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Publication number
EP0039461A1
EP0039461A1 EP81103127A EP81103127A EP0039461A1 EP 0039461 A1 EP0039461 A1 EP 0039461A1 EP 81103127 A EP81103127 A EP 81103127A EP 81103127 A EP81103127 A EP 81103127A EP 0039461 A1 EP0039461 A1 EP 0039461A1
Authority
EP
European Patent Office
Prior art keywords
exhaust air
electrodes
foreign substances
liquid
electrode arrangement
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Withdrawn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
EP81103127A
Other languages
German (de)
English (en)
Inventor
Fritz Blaser
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.)
Kunststofftechnik KG
Original Assignee
Kunststofftechnik KG
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
Priority claimed from CH348880A external-priority patent/CH650940A5/de
Application filed by Kunststofftechnik KG filed Critical Kunststofftechnik KG
Publication of EP0039461A1 publication Critical patent/EP0039461A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type

Definitions

  • the invention relates to a method for exhaust air purification and an apparatus for performing this method.
  • the Swiss patent 556 004 proposes a deodorization of exhaust air by the action of water enriched with ozone. This method has the disadvantage that the exhaust air is not completely cleaned, but instead contains foreign substances, in particular the oxidation products.
  • the invention has for its object to provide a method and an apparatus for exercising the same in order to purify exhaust air with various contaminants, in particular without deodorising residual or newly formed pollutants and yet not the disadvantages of the aforementioned known methods, for example the need for large and expensive systems and high energy consumption.
  • a very low ozone content preferably below 0.1 ppm, should be guaranteed in the exhaust air.
  • Fig. 1 the sequence of the method and the structure of the device for performing the method is shown in a block diagram.
  • Exhaust air is supplied via a supply line 1, which is contaminated by odor-active substances, polar organic substances, alcohols, ethers, aldehydes, ketones, acids, mineral oil vapors, dust particles, smoke, bacteria, pollen, soot, fly ash, toxic gases and vapors or the like.
  • the exhaust air from a web offset printing press or from a restaurant kitchen is to be cleaned.
  • the method or the device in restaurant kitchens which are housed on the ground floor, it is no longer necessary to have to carry the exhaust air through the entire building upwards. Rather, the exhaust air is cleaned so well that you can let it step outside in the kitchen.
  • the incoming exhaust air AL passes through a heat exchanger 2 of known construction, which extracts heat from the exhaust air. This leads to the condensation of foreign substances, such as a nebulized mineral oil.
  • the exhaust air is then fed to a corona discharge in an externally ventilated first electrode arrangement 3, in which the mineral oil droplets are electrostatically positively charged. Doing so Electrode voltage from 30 to 50 kV used.
  • the exhaust air reaches the device part 70, which, as can be seen in detail in FIGS. 3-5, contains a nozzle 4 for atomizing a washing liquid 5 by means of compressed air.
  • the droplet diameter in the exemplary embodiment shown is 0.02 mm and the specific surface area is 300 m 2/1 .
  • the nozzle 4 is a so-called two-component nozzle which, on the one hand, atomizes the said washing liquid and, on the other hand, simultaneously supplies ozone from an ozone generator 6, so that liquid droplets saturated with ozone are formed during the atomization.
  • the device part 70 also contains an electrostatic charging ring 7, in which the atomized and ozone-saturated washing liquid is negatively charged.
  • the exhaust air then passes into a reaction chamber 9, in which the electrostatically charged foreign substances in the exhaust air accumulate on the oppositely charged ozonized liquid droplets, the foreign substances penetrating into the interior of the droplets.
  • This process of penetration is further facilitated by adding a surfactant from a vessel 15 (see FIG. 3).
  • the gases and vapors are simultaneously cooled as a result of evaporation. Both inside the liquid droplets and in the humid, ozone-enriched air, chemical degradation now takes place due to the oxidation of the foreign substances.
  • the exhaust air is now fed to a second electrode arrangement 10, in which the droplets neutralized in the upstream reaction chamber 9 are negatively charged.
  • the charged liquid droplets loaded with solid and oxidized foreign substances finally reach the separating electrodes 11 located at the end of the system.
  • These electrodes shown in FIGS. 3 and 7 are covered with a liquid film so that the adhering foreign substances are removed.
  • the exhaust air cleaned of the foreign substances and deodorized which is now referred to as exhaust air, is passed outside by a fan 12.
  • An emulsifier is added to the drain liquid of the electrodes 11, which separates the washing liquid and oil in a collecting basin.
  • FIG. 2 shows the temperature profile during the process or in the individual departments of the device.
  • the exhaust air to be cleaned occurs in the illustrated embodiment with a temperature of 120 ° C in the device.
  • the temperature is then reduced in the heat exchanger 2 to 47 ° C. and remains constant until it enters the reaction chamber 9.
  • In the reaction chamber there is a cooling to about 26 ° C.
  • the heat extracted from the incoming exhaust air in the heat exchanger 2 is fed back to the exhaust air emerging from the separator 11 and the temperature of the exhaust air FL increases accordingly.
  • the diagram also shows the temperature of the cooling air KL entering the heat exchanger.
  • Fig. 3 contains a schematic representation of the control and the flow diagram of the entire system. The facility is supplied with 101 electrical power and 102 water.
  • a positive and negative high-voltage source 13 feeds the electrodes 3, 7 and 10.
  • Compressed air is generated by a compressor 14, with which the washing liquid is atomized from a vessel 15 and at the same time 6 ozone is admixed to it from an ozone generator. Air is supplied to the ozone generator 6 at 105 and 106 and removed at 104 regenerate.
  • the washing liquid consists of water with a surfactant.
  • the residual ozone content in the cleaned exhaust air is regulated by a measuring and regulating device 16, 107 in such a way that there is no excess. For this purpose, the ozone content in the cleaned exhaust air is continuously measured.
  • the amount of heat that is supplied to the exhaust air by the cooling air via a fan 18 is controlled with a heat recovery device 17, 103. These Heat recovery device allows the amount of heat extracted in the heat exchanger 2 to be reused.
  • an emulsifier is added to the drain liquid from a container 19.
  • Fig. 4 shows a longitudinal section through the electrodes and reveals their forced ventilation.
  • the electrodes 3 are arranged in a housing 20.
  • the exhaust air to be cleaned flows through the electrode arrangement in the direction of the horizontal arrow.
  • a fan 21 draws in the cleaning air through a fine dust filter 22.
  • the cleaning air is then fed to the electrodes 3 via an air distribution channel 23.
  • the high voltage generator 13 supplies the electrodes with a voltage between 15 and 50 kV.
  • Fig. 5 the humidifier is shown in longitudinal section. Compressed air and ozone are fed to an injector 28 via lines 26 and 27. The two-component nozzle 4 is supplied with the air-ozone mixture via a line 29 and the wetting liquid via a line 30.
  • the humidifier is arranged in a housing 31 made of plastic.
  • the high voltage is supplied from the generator 13 to the electrodes 7 via the line 32.
  • the atomized liquid droplets saturated with ozone are negatively charged within the electrode ring 7.
  • the flow can be regulated by an adjusting disc 35, which is finely adjustable via a threaded pin 34 carrying it.
  • FIG. 6 shows this separator in longitudinal section
  • FIG. 7 shows a single separating electrode 11 in section.
  • the cut-off electrodes 11, as can be seen from FIG. 6, are designed and combined as an exchangeable element 36.
  • the electrodes 11, which are preferably made of copper tubes, are used for this purpose in a liquid-tight manner in a housing 37 for the drainage liquid.
  • the shut-off liquid is fed to this housing 37 by a circulation pump from an emulsion reservoir 108 via a line 39.
  • the liquid is then pumped up inside the hollow electrodes 11 and then flows down again on the outside 40 of these electrodes. Part of the liquid is then returned to the housing 37, while another part flows out through an outlet 41.
  • the cover 42 is removed and a screw connection 43 on the pipe 39 is loosened.
  • Fig. 8 shows the activation electrodes 3 and 10 (see Fig. 4 and 9) on a larger scale in section.
  • the cleaning air is conducted via the vertical air distribution channel 23 into horizontally extending connections 44 and passes through openings 45 in individual directions in the horizontal direction transverse to the exhaust air flow extending housing 46 open at the front.
  • electrodes 47 and 48 which are alternately connected to ground or to the positive or negative pole of the high voltage source 13.
  • the electrodes 47 connected to ground are cuboid, that is to say of a square cross section, and extend horizontally across the exhaust air flow, which is indicated by arrows.
  • the electrodes 48 and 49 connected to the positive and negative poles are tubular with one or two longitudinal slots and are also arranged in the horizontal direction, transversely to the exhaust air flow.
  • tubular electrodes 48, 49 there is in each case a concentrically arranged rod 50, from which tips 51 project in the vertical direction either upwards or downwards.
  • tips 51 project in the vertical direction either upwards or downwards.
  • the positively or negatively charged electrodes are used to charge foreign substances in the exhaust air or water droplets. External ventilation is used to keep the electrodes clean.
  • the deodorization of the exhaust air is carried out by the parts already discussed and shown in FIGS. 4 and 5.
  • the particles to be removed from the air are charged positively by the electrodes 3.
  • Water droplets saturated with ozone are negatively charged in the humidifier and mixed with the air to be cleaned mixes, whereby the positively charged particles and the negatively charged water droplets attract and electrically neutralize, while the ozone causes an oxidation of the foreign substances.
  • FIG. 9 A complete air neutralization system with foreign matter separation is shown in FIG. 9. This system is composed of the individual components according to FIGS. 4, 5 and 6 and otherwise corresponds to the system already described with reference to FIGS. 1 and 3.

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  • Electrostatic Separation (AREA)
EP81103127A 1980-05-05 1981-04-27 Procédé et dispositif pour l'épuration de l'air usé Withdrawn EP0039461A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH3488/80 1980-05-05
CH348880A CH650940A5 (en) 1980-05-05 1980-05-05 Process and equipment for exhaust air purification
CH1778/81 1981-03-16
CH177881 1981-03-16

Publications (1)

Publication Number Publication Date
EP0039461A1 true EP0039461A1 (fr) 1981-11-11

Family

ID=25688647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103127A Withdrawn EP0039461A1 (fr) 1980-05-05 1981-04-27 Procédé et dispositif pour l'épuration de l'air usé

Country Status (1)

Country Link
EP (1) EP0039461A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916640A (en) * 1996-09-06 1999-06-29 Msp Corporation Method and apparatus for controlled particle deposition on surfaces
WO2003064004A1 (fr) * 2002-01-30 2003-08-07 Bcde Group Waste Management Ltd Oy Procede et appareil de nettoyage des gaz d'echappement d'un comburant biologique
EP2246117A4 (fr) * 2008-02-20 2014-01-29 Daikin Ind Ltd Collecteur de poussières
CN116889930A (zh) * 2023-08-08 2023-10-17 杭州青云新材料股份有限公司 制备氨纶包覆纱的尾气微粒污染物处理设备及其工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH258839A (de) * 1941-05-13 1948-12-31 Westinghouse Electric Corp Verfahren und Einrichtung zur Abscheidung von Staubpartikeln aus einem Gasstrom.
FR1540032A (fr) * 1967-09-15 1968-09-20 Dispositif fumivore
DE2024423A1 (de) * 1970-05-20 1971-12-09 Schmid O Verfahren und Vorrichtung zum Abscheiden von festen, flüssigen und/oder gasförmigen Teilchen aus Gasen oder Dämpfen
CH556004A (de) * 1972-08-08 1974-11-15 Var Sa Verfahren und vorrichtung zur desodorierung von abluft.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH258839A (de) * 1941-05-13 1948-12-31 Westinghouse Electric Corp Verfahren und Einrichtung zur Abscheidung von Staubpartikeln aus einem Gasstrom.
FR1540032A (fr) * 1967-09-15 1968-09-20 Dispositif fumivore
DE2024423A1 (de) * 1970-05-20 1971-12-09 Schmid O Verfahren und Vorrichtung zum Abscheiden von festen, flüssigen und/oder gasförmigen Teilchen aus Gasen oder Dämpfen
CH556004A (de) * 1972-08-08 1974-11-15 Var Sa Verfahren und vorrichtung zur desodorierung von abluft.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916640A (en) * 1996-09-06 1999-06-29 Msp Corporation Method and apparatus for controlled particle deposition on surfaces
WO2003064004A1 (fr) * 2002-01-30 2003-08-07 Bcde Group Waste Management Ltd Oy Procede et appareil de nettoyage des gaz d'echappement d'un comburant biologique
EP2246117A4 (fr) * 2008-02-20 2014-01-29 Daikin Ind Ltd Collecteur de poussières
CN116889930A (zh) * 2023-08-08 2023-10-17 杭州青云新材料股份有限公司 制备氨纶包覆纱的尾气微粒污染物处理设备及其工艺

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19821016

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Inventor name: BLASER, FRITZ