EP1626647A1 - Aspirateur comprenant un dispositif de nettoyage a air comprime destine au nettoyage d'un filtre ceramique - Google Patents

Aspirateur comprenant un dispositif de nettoyage a air comprime destine au nettoyage d'un filtre ceramique

Info

Publication number
EP1626647A1
EP1626647A1 EP04733344A EP04733344A EP1626647A1 EP 1626647 A1 EP1626647 A1 EP 1626647A1 EP 04733344 A EP04733344 A EP 04733344A EP 04733344 A EP04733344 A EP 04733344A EP 1626647 A1 EP1626647 A1 EP 1626647A1
Authority
EP
European Patent Office
Prior art keywords
ceramic filter
particles
motor
blower unit
vacuum cleaner
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Withdrawn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
EP04733344A
Other languages
German (de)
English (en)
Inventor
Wolfgang Kemmerzell
Albert Kleinhenz
Michael Krammer
Georg Schwalme
Thomas Strehler
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1626647A1 publication Critical patent/EP1626647A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/20—Means for cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/69—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side without movement with respect to the filter elements, e.g. fixed nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/90—Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/55—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning appliances, e.g. suction cleaners

Definitions

  • the invention relates to a device for separating particles from air, in particular for filtering out dust in a vacuum cleaner according to the preamble of claim 1.
  • a vacuum cleaner with a housing and a blower which has a dust separator and a dust collection unit. Air is led from the vacuum cleaner nozzle into an inlet chamber of the dust separator via a suction hose. The air directed into the inlet chamber can escape from the inlet chamber via an outlet chamber which has a multiplicity of small holes.
  • the outlet chamber has a vertically arranged cylindrical filter which is arranged concentrically within the outlet chamber.
  • the cylindrical filter can be made of ceramic material.
  • the object of the invention is to improve a generic device such that the functionality of the device is maintained over a long period of time.
  • the device has a cleaning device for removing the particles attached to the ceramic filter.
  • the passage openings or the flow channels within the ceramic filter are exposed again by preferably mechanically removing the particles attached to the ceramic filter, so that the suction air flow generated by a motor / blower unit can flow through the ceramic filter with as little pressure drop as possible.
  • the device can remove the particles with high efficiency separate from the air.
  • the vacuuming result improves with vacuum cleaners, since the suction power at the nozzle is maintained over a long period of time.
  • the cleaning device is designed in particular for removing particles attached to the upstream surface of the ceramic filter, but is also suitable for removing particles from inner flow channels of the open-pore ceramic filter.
  • the vast majority of the particles accumulate on the upstream surface of the ceramic filter and only a small proportion of particles get into the inner structure of the ceramic filter.
  • the greatest cleaning effect is achieved if the particles attached to the upstream surface are preferably removed, since most of the particles are present there. Removing the particles from the upstream surface of the ceramic filter is also possible by means that are much simpler than removing particles from the internal structure of the ceramic filter.
  • the cleaning device preferably has a compressed air generator for blowing off the particles from the upstream surface of the ceramic filter.
  • a compressed air generator By using a compressed air generator, the particles can be blown off the surface of the ceramic filter in a simple manner. Cleaning with compressed air has the particular advantage that no chemical or thermal means are required to clean the ceramic filter. If the device for filtering dust is provided in a vacuum cleaner, in particular the motor / blower unit already present in the vacuum cleaner can be used as a compressed air generator for blowing off the particles from the ceramic filter. This provides a cost-effective cleaning device, in particular for vacuum cleaners.
  • the compressed air generator or the motor / blower unit present in the vacuum cleaner is preferably connected with its overpressure side in terms of flow technology to the surface of the ceramic filter on the outflow side. If the compressed air generator is connected with its overpressure side to the downstream surface of the ceramic filter, an air flow is generated which, starting from the downstream surface, leads through the ceramic filter to the upstream surface of the ceramic filter. By blowing back the ceramic filter in this way in a direction of flow which is directed against the direction of flow for depositing the particles, the Particles are blasted off the upstream surface of the ceramic filter.
  • the alternative of flowing through or blowing back the ceramic filter has the advantage that not only particles are blown off the surface of the ceramic filter, but at least partly also the particles penetrated into the structure of the ceramic filter can be blown out against their direction of penetration. By blowing back the ceramic filter in this way, it is particularly effectively cleaned of deposited particles.
  • the cleaning device can have a first valve arrangement which closes the outlet opening when excess pressure is present on the downstream surface of the ceramic filter. If the existing motor / blower unit is used as a compressed air generator in a conventional vacuum cleaner, it must be ensured by means of a suitable valve arrangement that the motor / blower unit generates a negative pressure rather than a negative pressure on the downstream surface of the ceramic filter. To generate an overpressure space within the vacuum cleaner, the outlet opening which is provided in the vacuum cleaner operation for blowing out cleaned air is therefore to be closed in the cleaning operation. The outlet opening is closed by means of a first valve arrangement when the cleaning device is in operation and an overpressure is to be applied to the downstream surface of the ceramic filter. In a simple and inexpensive embodiment, the first valve arrangement can have a flap, which is preferably mechanically or electrically operated and is arranged in the outlet opening.
  • the compressed air generator can be formed by the motor / blower unit of the vacuum cleaner.
  • an overpressure can be generated on the downstream surface of the ceramic filter by reversing the direction of rotation of the motor / blower unit.
  • the blades of the blower part are designed in such a way that, depending on the direction of rotation, they effectively and overpressure or underpressure on the side facing the ceramic filter can generate.
  • a conventional motor that can be operated in both directions of rotation can be used as the drive for the blower unit. If a motor is used that can only be operated in one direction of rotation, a gear can be provided between the motor and blower unit, by means of which the blower can be reversed in its direction of rotation.
  • the overpressure can be provided for the downstream surface of the ceramic filter in cleaning operation by means of a bypass line.
  • the motor / blower unit is arranged in the flow channel and connected on the negative pressure side to the downstream surface of the ceramic filter, and a bypass line is assigned to the flow channel, which connects the positive pressure side of the motor / blower unit to the downstream side surface of the ceramic filter.
  • the bypass lines conduct the overpressure that is generated at one end of the motor / blower unit, which faces away from the downstream surface of the ceramic filter in suction operation, to the downstream surface of the ceramic filter.
  • a third valve arrangement is therefore provided in the bypass line for switching the motor / blower unit from suction mode to cleaning mode, for closing the bypass line in a separating mode.
  • the motor / blower unit is in suction mode, in which particles are separated on the upstream surface of the ceramic filter.
  • the third valve arrangement can be designed in a simple and inexpensive manner as a flap which is arranged in the bypass line and can be actuated mechanically or electrically.
  • the cleaning device can have a second valve arrangement which closes the flow channel between the motor / blower unit and the ceramic filter when there is excess pressure on the downstream surface of the ceramic filter. If a motor / blower unit is used which cannot be reversed in its direction of rotation and which has a bypass line which connects the overpressure side of the motor / Blower unit connects to the downstream surface of the ceramic filter, to avoid short-circuit operation, it is necessary to close the flow channel between the downstream surface of the ceramic filter and the negative pressure side of the motor-Z blower unit.
  • the second valve arrangement for closing this flow channel can be designed in a simple and inexpensive manner as a flap which can be actuated mechanically or electrically in a manner analogous to the first and third valve arrangements.
  • a fourth valve arrangement for opening a flow passage between the negative pressure side of the motor / blower unit and the free environment can be provided in a cleaning operation.
  • a sufficient amount of fresh air can be supplied to the negative pressure side of the motor / blower unit via this flow passage without having to rely on an air supply through the ceramic filter. If fresh air can reach the vacuum side of the motor / blower unit in the cleaning mode via the open flow passage, the motor / blower unit can be operated efficiently and with high efficiency with a low pressure drop during suction.
  • the compressed air generator can be operated intermittently in the cleaning mode for pulsating flow against the surface of the ceramic filter.
  • a pulsating flow has the advantage that a force is applied to the particles deposited on the surface of the ceramic filter. Due to the impulsive action on the particles, not only particles attached to the outer surface of the ceramic filter can be effectively blown off, but also particles that have penetrated into the inner structure of the ceramic filter can be successfully blown out of the ceramic filter.
  • the device can have a collecting container for the particles removed from the ceramic filter by the cleaning device.
  • the cleaning device removes the particles deposited on the upstream surface of the ceramic filter into a space facing the upstream surface of the ceramic filter, in particular into a dust chamber of a vacuum cleaner blown back.
  • the collecting container can be arranged in such a way that the particles detached from the upstream surface of the ceramic filter preferably fall or are pushed into the collecting container by gravity or the existing air flow.
  • the device can have a conveying means arranged between the ceramic filter and the collecting container for transporting the particles detached from the ceramic filter into the collecting container.
  • the funding ensures that the particles released from the upstream surface of the ceramic filter can get into the collecting container.
  • the position of the collecting container within the device or within the vacuum cleaner can be freely selected.
  • the collecting container then no longer has to be arranged below the ceramic filter when gravity is used, such that the particles detached from the surface of the ceramic filter can fall into the collecting container solely due to gravity.
  • the conveying means on the other hand, can be designed in such a way that the particles detached from the surface of the ceramic filter are transported, in particular against the force of gravity, to a position that is not below the ceramic filter.
  • the conveying means can be formed, for example, by an air-flow channel which blows the particles detached from the surface of the ceramic filter into the collecting container via the channel. The particles are transported within the channel by the drag force of the air flow.
  • the conveying means can also be designed, for example, as a simple slide, which uses the force of gravity to transport the particles from the surface of the ceramic filter into the collecting container.
  • the invention also relates to an associated method.
  • the method for separating particles from air is characterized by the following method steps.
  • the dust-laden air is sucked in through an inlet opening in a housing, in particular a vacuum cleaner.
  • the air drawn in is conveyed through a ceramic filter arranged in the vacuum cleaner. Dust accumulates particularly on the upstream surface of the ceramic filter. After the air has passed the ceramic filter, the cleaned air becomes one The outlet opening in the vacuum cleaner housing is blown out. After the dust is deposited on the upstream surface of the ceramic filter and the cleaned air is blown out, the ceramic filter is cleaned by blowing off the dust deposited on the upstream surface of the ceramic filter.
  • the dust can be blown off from the upstream surface of the ceramic filter by applying an overpressure to the upstream surface of the ceramic filter.
  • the method can have the following additional steps.
  • the outlet opening is closed by means of a first valve arrangement.
  • a flow channel between an engine / blower unit and the ceramic filter is closed by means of a second valve arrangement.
  • a bypass line which connects the positive pressure side of the motor-Z blower unit to the downstream surface of the ceramic filter, is opened by means of a third valve arrangement.
  • a flow passage between the vacuum side of the motor-Z blower unit and the free environment is opened by means of a fourth valve arrangement.
  • overpressure can be generated by reversing the direction of rotation of a motor-Z blower unit connected as a suction fan to the downstream surface of the ceramic filter. Reversing the direction of rotation of the motor-Z blower unit has the advantage that extensive valve arrangements can be largely dispensed with.
  • Figure 1 is a schematic representation of a device according to the invention.
  • FIG. 1 is a schematic representation of a variant of the device according to the invention.
  • the schematic illustration in FIG. 1 shows a housing 1 of a vacuum cleaner.
  • An intermediate wall 2 extends within the housing and separates the housing 1 into a blower chamber 3 and a dust chamber 4.
  • the intermediate wall 2 has an opening section 5 through which suction air is drawn in from the dust chamber 4 into the blower chamber 3.
  • the opening section 5 is covered by a ceramic filter 6.
  • the ceramic filter 6 has an open-pore structure and can be produced, for example, as a foam ceramic in known processes.
  • the ceramic filter 6 can be detachably fastened in the housing 1.
  • a removal opening 7 can be formed on the housing 1, through which the detachable ceramic filter 6 can be removed from the housing 1.
  • the ceramic filter 6 is designed as a flat filter.
  • the ceramic filter 6 can also be designed as a hollow chamber filter (not shown). If the ceramic filter 6 is designed like a hollow chamber, the inner wall of the ceramic can form the bounding walls of the dust chamber 4. Dust-laden air can enter the dust chamber 4 via an inlet opening 8.
  • the inlet opening 8 is formed by a coupling piece arranged in a dust chamber cover, to which a suction hose with a telescopic tube and nozzle can be connected (not shown).
  • the bottom surface and parts of the side wall of the dust chamber 4, which are located below the ceramic filter 6, form a collecting container 9 for particles 10.
  • a motor-Z blower unit 11 is arranged within the blower chamber 3.
  • the motor-Z blower unit 11 has an electric drive motor 12, the drive shaft 13 of which carries an impeller 14.
  • the fan wheel 14 fluidically separates the fan space 3 into a vacuum space 15 and an overpressure space 16.
  • the vacuum space 15 is fluidly connected to a downstream surface 17 of the ceramic filter 6. Due to the negative pressure generated in the negative pressure space 15 by the motor-Z blower unit 11, air laden with particles or dust is sucked into the dust chamber 4 via the inlet opening 8. The suction air flow is sucked through the open-pore ceramic filter 6 into the vacuum chamber 15. Due to the small pore size of a few micrometers of the ceramic filter 6, the particles 10 are retained in the dust chamber 4 without being able to pass through the ceramic filter 6.
  • the particles 10 accumulate on an upstream surface 18 of the ceramic filter 6.
  • the suction air stream freed from particles 10 passes via the impeller 14 from the negative pressure space 15 into the positive pressure space 16.
  • Air cleaned of particles is blown out of the device via an outlet opening 19.
  • air cleaned of particles is thus conveyed in a flow channel 20 from the downstream surface 17 of the ceramic filter 6 for blowing out to the inlet opening 19.
  • the motor-Z blower unit simultaneously forms a compressed air generator 21 which is connected with its overpressure side in terms of flow technology to the downstream surface 17 of the ceramic filter 6.
  • a bypass line 23 is assigned to the flow channel 20. The bypass line 23 connects the positive pressure side of the motor-Z blower unit 11 to the downstream surface 17 of the ceramic filter 6.
  • a first valve arrangement 24 is assigned to the outlet opening 19, so that the outlet opening 19 is closed by the first valve arrangement 24 in the cleaning mode when excess pressure is present on the downstream surface of the ceramic filter 6. Closing the outlet opening 19 by means of the first valve arrangement 24 prevents overpressure from escaping from the overpressure space 16 to the outside via the outlet opening 19.
  • the overpressure which arises in the overpressure chamber 16 is passed to the bypass line 23 into an antechamber 25 which is connected in terms of flow technology to the downstream surface 17 of the ceramic filter 6.
  • a second valve arrangement 26 prevents short-circuit operation of the motor-Z blower unit 11 by preventing the overpressure from flowing back from the antechamber 25 into the vacuum chamber 15 by means of the second valve arrangement 26 in cleaning operation.
  • a third valve arrangement 27 is provided in the bypass line 23.
  • the third valve arrangement 27 serves to close the bypass line 23 in a normal suction operation of the vacuum cleaner. In cleaning operation, the third valve arrangement 27 is opened and the excess pressure prevailing in the overpressure space 16 can be passed into the antechamber 25.
  • a fourth valve arrangement 28 is arranged in a flow passage 29, which connects the vacuum chamber 15 to the free environment. In normal suction operation for the vacuum cleaner, the fourth valve arrangement 28 is closed. In cleaning operation, the fourth valve arrangement 28 is open and fresh air can be drawn into the vacuum chamber 15 from the surroundings. In the usual suction operation of the vacuum cleaner, both the first valve arrangement 24 and the second valve arrangement 26 is also open and the third valve arrangement and the fourth valve arrangement 28 are closed. In cleaning operation, the first valve arrangement 24 and the second valve arrangement 26 are closed and the third valve arrangement 27 and the fourth valve arrangement 28 are open. All valve arrangements can be designed, for example, as electrically operated slides or flaps.
  • an overpressure of air present in the vestibule 25 can only escape into the dust chamber 4 via the structure of the ceramic filter 6.
  • the ceramic filter 6 flows backwards from the downstream surface 17 in the direction of the upstream surface 18 of the ceramic filter, the ceramic filter 16 is flowed through from the antechamber 25 in the direction into the dust chamber 4. Particles 10 attached to the upstream surface 18 of the ceramic filter 6 are entrained and fall into the collecting container 9 due to the gravity or drag force of the blown air.
  • particles 10 are also cleaned out of the ceramic filter 6, which, due to its open-pore structure, have penetrated into the interior of the ceramic filter 6.
  • an overpressure in the antechamber 25 can also be generated if the direction of rotation of the electric motor 12 of the motor / blower unit 11 is reversed in its direction of rotation.
  • the impeller 14 is operated in the opposite direction and an excess pressure is built up in the previous vacuum chamber 15.
  • a negative pressure is created, which has the consequence that fresh air from the surroundings can enter via the open outlet opening 19.
  • the bypass line 23 can be omitted.
  • the valve arrangements 26, 27 and 28 are not required.
  • the compressed air generator 21 can be operated intermittently to pulsate against the downstream surface 17 of the ceramic filter 6.
  • a conveying means 30 can be arranged between the ceramic filter 6 and the collecting container 9 in order to transport the particles 10 detached from the ceramic filter 6 into the collecting container 9.
  • the variant shown in FIG. 2 has at least one jet nozzle 31 directed towards the upstream surface 18 of the ceramic filter 6.
  • the jet nozzle is supplied with excess pressure via an air pressure line 32.
  • the excess pressure can be generated by an air compressor 33 which can be driven by an electric motor 34.
  • the electric motor 34 can be connected to its own energy source 35b or to the same electrical energy source 35a as the motor 12 of the motor-Z blower unit 11.
  • the energy source 35b can also be a mains-independent energy supply, such as a battery or an accumulator.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un système, en particulier un aspirateur, servant à séparer les particules en suspension dans l'air, en particulier à filtrer la poussière dans un aspirateur, ce système comprenant un boîtier (1) contenant un groupe moteur/ventilateur (11) pour aspirer l'air chargé en particules par une ouverture d'entrée (8), acheminer cet air à travers un filtre céramique (6), les particules se déposant de préférence sur la surface côté flux entrant (18) de ce filtre céramique, et évacuer côté flux sortant l'air épuré par une ouverture de sortie (19) reliée par un canal d'écoulement (20) à la surface côté flux sortant (17) du filtre céramique. Selon l'invention, pour garantir le bon fonctionnement de ce système pendant une durée prolongée, ledit système est équipé d'un dispositif de nettoyage (22) destiné à éliminer, en particulier mécaniquement, les particules déposées sur le filtre céramique. Grâce à ce dispositif, le système selon l'invention peut séparer les particules en suspension dans l'air avec un grand rendement, même en cas d'utilisation prolongée ou en présence d'une quantité importante de poussière à séparer. Les performances d'aspiration des aspirateurs s'en trouvent améliorées du fait que la puissance d'aspiration au niveau de la buse est maintenue pendant une durée prolongée.
EP04733344A 2003-05-15 2004-05-17 Aspirateur comprenant un dispositif de nettoyage a air comprime destine au nettoyage d'un filtre ceramique Withdrawn EP1626647A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10321977A DE10321977A1 (de) 2003-05-15 2003-05-15 Staubsauger mit einer durch Druckluft wirkenden Reinigungsvorrichtung für Keramikfilter
PCT/EP2004/005301 WO2004100752A1 (fr) 2003-05-15 2004-05-17 Aspirateur comprenant un dispositif de nettoyage a air comprime destine au nettoyage d'un filtre ceramique

Publications (1)

Publication Number Publication Date
EP1626647A1 true EP1626647A1 (fr) 2006-02-22

Family

ID=33394641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04733344A Withdrawn EP1626647A1 (fr) 2003-05-15 2004-05-17 Aspirateur comprenant un dispositif de nettoyage a air comprime destine au nettoyage d'un filtre ceramique

Country Status (4)

Country Link
EP (1) EP1626647A1 (fr)
CN (1) CN1791351A (fr)
DE (1) DE10321977A1 (fr)
WO (1) WO2004100752A1 (fr)

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PL2046182T3 (pl) 2006-07-29 2014-10-31 Kaercher Gmbh & Co Kg Alfred Odkurzacz z urządzeniem do samooczyszczania filtru
EP2046184B1 (fr) * 2006-07-29 2014-01-15 Alfred Kärcher GmbH & Co. KG Procede pour nettoyer le filtre d'un aspirateur et aspirateur pour mettre en oeuvre le procede
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CN107347654B (zh) * 2017-08-18 2021-06-15 合肥耀世同辉科技有限公司 一种牛羊粪便清除装置及其清除方法
CN107694227A (zh) * 2017-11-23 2018-02-16 南京中研专利技术开发有限公司 一种应用于燃煤电厂的具有除尘脱硫功能的废气处理设备
CN108326446A (zh) * 2018-03-02 2018-07-27 深圳市圭华自动化设备有限公司 一种激光切割机
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DE10321977A1 (de) 2004-12-02
CN1791351A (zh) 2006-06-21

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