WO2005118111A1 - Method and device for emptying and cleaning a filter arrangement for collection of particles - Google Patents

Method and device for emptying and cleaning a filter arrangement for collection of particles Download PDF

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Publication number
WO2005118111A1
WO2005118111A1 PCT/SE2005/000751 SE2005000751W WO2005118111A1 WO 2005118111 A1 WO2005118111 A1 WO 2005118111A1 SE 2005000751 W SE2005000751 W SE 2005000751W WO 2005118111 A1 WO2005118111 A1 WO 2005118111A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter arrangement
unit
filter
valve
arrangement
Prior art date
Application number
PCT/SE2005/000751
Other languages
French (fr)
Swedish (sv)
Inventor
Ralf Nilsson
Original Assignee
Ermator Ab
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 Ermator Ab filed Critical Ermator Ab
Publication of WO2005118111A1 publication Critical patent/WO2005118111A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • 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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • 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
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like

Definitions

  • the invention relates to a method and a device for collecting particles that are generated during abrasive processes of various kinds, for example during sanding using floor sanders and the like.
  • the object of the invention is therefore to achieve an improved method and a device of the kind mentioned in the introduction, that can be in continuous operation for a longer period of time.
  • Figure 1 shows a vertical view in cross-section of a filter arrangement in a device for collecting particles according to the invention
  • Figure 2 shows a block diagram of the valve control in a further development of the device, according to which two identical filter arrangements, such as the one shown in Figure 1 , are operated simultaneously using a control unit.
  • Identical components have the same reference numerals in the figures, in this case with the addition of the prime sign to distinguish components in the first filter - arrangement from corresponding components in the second filter arrangement.
  • FIG 1 shows a filter arrangement 2 with a casing 3, an inlet 4 and an outlet 5.
  • the inlet is connected, either directly or, in the case of simultaneous operation, via a branch pipe 6 shown in Figure 2, to a particle-filled air flow that is generated by an attached machine.
  • the outlet 5 is connected to the suction side of a fan 7 of conventional type that is only shown in Figure 2.
  • the inlet 4 leads, via a first valve 8, to a conventional cyclone device 10 with a coarse filter 12 and a bottom part 14 for separating off most of the particles from the air flow in a known way.
  • the bottom part has a hinged trap door 16 that forms a seal against the lower edge of the bottom part 14 and thereby can be held closed by atmospheric pressure when a vacuum is created in the cyclone 10 by the fan 7.
  • the coarse filter unit 12 is similarly of conventional type and contains a suitable number of known filter cartridges or cloth filters 18.
  • the coarse filter unit 12 has an outlet side 20 which is connected via a second valve 22 to an inlet side of a microfilter unit 24 which, where applicable, can contain a plurality of parallel-connected microfilters 26 of conventional type and which leads into the outlet 5 at its outlet side.
  • a third valve 28 for admitting atmospheric air mounted in such a way that it is directed towards the outlet side of the coarse filter unit 12.
  • the first 8, second 22 and third 28 valves are preferably of an identical construction, for example sliding valves of conventional type, and can be operated electrically, pneumatically or electro-pneumatically by means of a control unit CU and an operating unit MU.
  • the fan 7 can also be operated via the control unit CU.
  • the control unit is preferably a microprocessor (that is part of a so-called PLC system).
  • the function of the filter arrangement 2 is described in greater detail in the following. Emptying and cleaning the filter arrangement is carried out by operating the valves by means of the control unit CU as follows:
  • the first valve 8 is closed to create a vacuum in the filter arrangement 2, whereupon the second valve 22 is closed to isolate the microfilter unit 24 from the coarse filter unit 12.
  • the trap door 16 is opened by gravity and releases the collected particles, which are collected in a plastic bag, a collection vessel or a tubular bag system in the conventional way.
  • the third valve 28 is then closed again and the second valve 22 is opened, whereupon the procedure is repeated a predetermined number of times, preferably twice, after which the first valve 8 and the second valve 22 are opened for continued operation of the filter arrangement 2.
  • the time sequence and duration of each step in the procedure described above can be controlled by means of the control unit CU and emptying and cleaning of the filter arrangement 2 can be carried out in response to signals sent from the operating unit MU to the control unit CU.
  • two filter arrangements according to Figure 1 , a first filter arrangement 2 and a second identical filter arrangement 2' can be operated simultaneously by means of the control unit CU, in the way that is shown in Figure 2.
  • the control unit CU is then arranged to carry out emptying and cleaning of the first filter arrangement 2 while the second filter arrangement 2' is in operation and vice versa, in response to the signals from the operating unit MU.
  • the operating unit MU can be programmed with data relating to the duration of the times t], t 2 , t 3 ... , whereby it is possible to control the times for the alternating operation and emptying/cleaning of the first filter arrangement 2 and second filter arrangement 2'.

Abstract

The invention relates to a device for collecting particles by means of a first filter arrangement (2, 2') comprising a cyclone device (10) with a coarse filter unit (12) and a microfilter unit (24). The cyclone device (10) has a first valve (8) that is connected to an inlet (4) and the coarse filter unit (12) is in turn connected to the inlet side of the microfilter unit (24), that is connected to the suction side of a fan (7). The filter arrangement can be emptied and cleaned by means of the operation in particular steps of the first valve (8), a second valve (22), that is incorporated between the coarse filter (12, 18) and the microfilter (24, 26), a third valve (28), mounted in the casing (3, 3') of the filter arrangement in such a way that it is directed towards the outlet side of the coarse filter unit (12) for admitting atmospheric air, and a trap door arranged in the bottom part (14) of the cyclone arrangement.

Description

\ METHOD AND DEVICEj FOR EMPTYING AND CLEANING A 'i?Z' £ l-LTER AR N EMENT FOR COLLECTION OF PARTICLES
The invention relates to a method and a device for collecting particles that are generated during abrasive processes of various kinds, for example during sanding using floor sanders and the like.
An arrangement with a tube-shaped filter in combination with a cyclone as a coarse filter for a first filtration and the removal of the largest particles and then the use of a microfilter to remove the remaining particles is already known. From time to time, the collecting device needs to be stopped for emptying, changing the bag and cleaning the filter. While this is being carried out, the work using the floor sander must also be interrupted.
The object of the invention is therefore to achieve an improved method and a device of the kind mentioned in the introduction, that can be in continuous operation for a longer period of time.
This is possible with a method and a device as described in the following patent claims.
An example of an embodiment of the invention is described in the following with reference to the attached schematic drawings.
Figure 1 shows a vertical view in cross-section of a filter arrangement in a device for collecting particles according to the invention and Figure 2 shows a block diagram of the valve control in a further development of the device, according to which two identical filter arrangements, such as the one shown in Figure 1 , are operated simultaneously using a control unit. Identical components have the same reference numerals in the figures, in this case with the addition of the prime sign to distinguish components in the first filter - arrangement from corresponding components in the second filter arrangement.
Figure 1 shows a filter arrangement 2 with a casing 3, an inlet 4 and an outlet 5. The inlet is connected, either directly or, in the case of simultaneous operation, via a branch pipe 6 shown in Figure 2, to a particle-filled air flow that is generated by an attached machine. The outlet 5 is connected to the suction side of a fan 7 of conventional type that is only shown in Figure 2. The inlet 4 leads, via a first valve 8, to a conventional cyclone device 10 with a coarse filter 12 and a bottom part 14 for separating off most of the particles from the air flow in a known way. The bottom part has a hinged trap door 16 that forms a seal against the lower edge of the bottom part 14 and thereby can be held closed by atmospheric pressure when a vacuum is created in the cyclone 10 by the fan 7. The coarse filter unit 12 is similarly of conventional type and contains a suitable number of known filter cartridges or cloth filters 18.
The coarse filter unit 12 has an outlet side 20 which is connected via a second valve 22 to an inlet side of a microfilter unit 24 which, where applicable, can contain a plurality of parallel-connected microfilters 26 of conventional type and which leads into the outlet 5 at its outlet side.
In the casing 3 of the filter arrangement 2, there is a third valve 28 for admitting atmospheric air, mounted in such a way that it is directed towards the outlet side of the coarse filter unit 12.
The first 8, second 22 and third 28 valves are preferably of an identical construction, for example sliding valves of conventional type, and can be operated electrically, pneumatically or electro-pneumatically by means of a control unit CU and an operating unit MU. The fan 7 can also be operated via the control unit CU. The control unit is preferably a microprocessor (that is part of a so-called PLC system). The function of the filter arrangement 2 is described in greater detail in the following. Emptying and cleaning the filter arrangement is carried out by operating the valves by means of the control unit CU as follows:
The first valve 8 is closed to create a vacuum in the filter arrangement 2, whereupon the second valve 22 is closed to isolate the microfilter unit 24 from the coarse filter unit 12. The third valve 28, mounted in the casing 3 of the filter arrangement and pointing towards the outlet side of the coarse filter unit 12, is opened quickly in direct association with the closing of the second valve 22, whereupon atmospheric air rushes in towards the outlet side (the clean side) of the coarse filter unit 12 and dislodges particles that have collected on the opposite side of the coarse filter unit, which fall towards the bottom part 14 of the cyclone arrangement 10. As soon as the atmospheric pressure has created an equalization of the pressure in the cyclone arrangement 10, the trap door 16 is opened by gravity and releases the collected particles, which are collected in a plastic bag, a collection vessel or a tubular bag system in the conventional way. The third valve 28 is then closed again and the second valve 22 is opened, whereupon the procedure is repeated a predetermined number of times, preferably twice, after which the first valve 8 and the second valve 22 are opened for continued operation of the filter arrangement 2.
The time sequence and duration of each step in the procedure described above can be controlled by means of the control unit CU and emptying and cleaning of the filter arrangement 2 can be carried out in response to signals sent from the operating unit MU to the control unit CU.
In an advantageous way, two filter arrangements according to Figure 1 , a first filter arrangement 2 and a second identical filter arrangement 2' can be operated simultaneously by means of the control unit CU, in the way that is shown in Figure 2. This is possible as particle-filled air from the machine in - question is connected by means of the branch pipe 6 to each inlet on the respective filter arrangement 2, 2' and the outlet side of the microfilter unit 24, 24' in the respective filter arrangement is connected to the suction side of the fan 7. The control unit CU is then arranged to carry out emptying and cleaning of the first filter arrangement 2 while the second filter arrangement 2' is in operation and vice versa, in response to the signals from the operating unit MU.
The operating unit MU can be programmed with data relating to the duration of the times t], t2, t3 ... , whereby it is possible to control the times for the alternating operation and emptying/cleaning of the first filter arrangement 2 and second filter arrangement 2'.

Claims

- CLAIMS
1. Method for collecting particles by means of at least a first filter arrangement (2, 2') comprising a cyclone device (10) with a coarse filter unit (12) and a microfilter unit (24) that has an inlet side and an outlet side, which cyclone device (10) is connected via a first valve (8) to an inlet (4) for a particle-filled air flow and which coarse filter unit (12) has an outlet side (20) facing away from the cyclone device, which outlet side is in turn connected to the inlet side of the microfilter unit (24), the outlet side of which is connected to the suction side of a fan (7), whereby it is possible to separate off the particles from the air flow and to accumulate most of these in the bottom part (14) of the cyclone arrangement, characterized in that emptying and cleaning of the filter arrangement is carried out by means of the following steps: a) the first valve (8) is closed to create a vacuum in the filter arrangement (2, 2'), b) a second valve (22), that is incorporated between the coarse filter (12, 18) and the microfilter (24, 26), is closed to isolate the microfilter from the coarse filter, c) a third valve (28), mounted in the casing (3, 3') of the filter arrangement in such a way that it is directed towards the outlet side of the coarse filter unit (12) for admitting atmospheric air, is opened in direct association with the closing of the second valve (22), whereupon atmospheric air rushes in towards the clean side of the coarse filter unit (12) and dislodges particles that have collected on the opposite side of the coarse filter unit, which fall towards the bottom part (14) of the cyclone arrangement. d) there is an equalization of the pressure in the cyclone arrangement (10), whereupon a trap door (16) is opened by gravity and releases the collected particles, e) the third valve (28) is closed again, f) the second valve (22) is opened and steps b-e are repeated a predetermined number of times, g) the first valve (8) and the second valve (22) are opened for continued operation of the filter arrangement (2, 2').
2. Method according to Claim 1 , characterized in that the valves (8, 22, 28) are operated by means of a control unit (CU).
3. Method according to Claim 2, characterized in that the time sequence and duration of each step a-g are controlled by means of the control unit (CU).
4. Method according to any one of Claims 1-3, characterized in that emptying and cleaning of the filter arrangement (2, 2') are carried out in response to signals sent from an operating unit (MU) to the control unit (CU).
5. Method according to Claim 4, characterized in that the first filter arrangement (2) is operated simultaneously with a second identical filter arrangement (2') by means of the control unit (CU), with the particle-filled air flow being connected by means of a branch pipe (6) to each inlet on the respective filter arrangement and with the outlet side of the microfilter unit (24, 24') in the respective filter arrangement (2, 2') being connected to the suction side of the fan (7), which control unit (CU) is arranged to carry out emptying and cleaning of the first filter arrangement (2) while the second filter arrangement (2') is in operation and vice versa, in response to the signals from the operating unit (MU).
6. Method according to Claim 5, characterized in that during the consecutive times t-i, t2, t3 ... steps a-f for the first filter arrangement (2) and step g for the second filter arrangement (2') are initiated by means of the operating unit (MU) during the time t-i, steps a-f for the second filter arrangement (2') and step g for the second filter arrangement (2) are initiated by means of the operating unit (MU) during the time t2, and steps a-f for the - first filter arrangement (2) and step g for the second filter arrangement (2'), etc, are initiated again by means of the operating unit (MU) during the time t3.
7. Method according to Claim 6, characterized in that each time ti, t2, t3 ... has the same duration.
8. Method according to Claim 6, characterized in that each time t|, t2, t3 ... has a different duration.
9. Method according to any one of Claims 6-8, characterized in that the operating unit (MU) is programmed with data relating to the duration of the times ti, t2, t3 ... , and thereafter automatically controls the times for the alternating operation and emptying/cleaning of the first filter arrangement and second filter arrangement (2, 2').
10. Device for collecting particles by means of at least a first filter arrangement (2, 2') comprising a cyclone device (10) with a coarse filter unit (12) and a microfilter unit (24) that has an inlet side and an outlet side, which cyclone device (10) has a first valve (8) that is connected to an inlet (4) for a particle-filled air flow and which coarse filter unit (12) has an outlet side (20) facing away from the cyclone device, which outlet side is in turn connected to the inlet side of the microfilter unit (24), the outlet side of which is connected to the suction side of a fan (7), using which device it is possible to separate off the particles from the air flow and to accumulate most of these in the bottom part (14) of the cyclone arrangement, characterized in that the filter arrangement can be emptied and cleaned by means of the operation in particular steps of the first valve (8), a second valve (22), that is incorporated between the coarse filter (12, 18) and the microfilter (24, 26) for isolating the microfilter from the coarse filter, a third valve (28), mounted in the casing (3, 3') of the filter arrangement in such a way that it is directed towards the outlet side of the coarse filter unit (12) for admitting atmospheric air, and a trap door arranged in the bottom part (14) of the cyclone arrangement.
11. Device according to Claim 10, characterized in that the valves (8, 22, 28) can be operated by means of a control unit (CU).
12. Device according to Claim 11 , characterized in that the time sequence and duration of each step can be controlled by means of a control unit (CU).
13. Device according to any one of Claims 10-12, characterized in that emptying and cleaning of the filter arrangement (2, 2') are carried out in response to an operating unit (MU) that is arranged to send operating signals to the control unit (CU).
14. Device according to Claim 13, characterized in that the first filter arrangement (2) is arranged to be operated simultaneously with a second identical filter arrangement (2') by means of the control unit (CU), with the particle-filled air flow being connected by means of a branch pipe (6) to each inlet on the respective filter arrangement and with the outlet side of the microfilter unit (24, 24') in the respective filter arrangement (2, 2') being connected to the suction side of the fan (7), which control unit (CU) is arranged to carry out emptying and cleaning of the first filter arrangement (2) while the second filter arrangement (2') is in operation and vice versa, in response to the signals from the operating unit (MU).
PCT/SE2005/000751 2004-06-04 2005-05-20 Method and device for emptying and cleaning a filter arrangement for collection of particles WO2005118111A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0401446-0 2004-06-04
SE0401446A SE526500C2 (en) 2004-06-04 2004-06-04 Method and apparatus for emptying and cleaning a filter arrangement for collecting particles

Publications (1)

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WO2005118111A1 true WO2005118111A1 (en) 2005-12-15

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WO (1) WO2005118111A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2042241A1 (en) 2007-09-28 2009-04-01 Htc Sweden Ab Separator device
EP3202482A1 (en) * 2016-02-02 2017-08-09 General Electric Technology GmbH A gas dryer for an electric machine
CN108043156A (en) * 2017-12-20 2018-05-18 郑州赫恩电子信息技术有限公司 A kind of dust-laden exhaust gas energy-efficient treatment device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235610A (en) * 1978-05-22 1980-11-25 York-Shipley, Inc. Apparatus in the fabric filter control of air pollution
EP0841095A2 (en) * 1996-11-12 1998-05-13 Doryokuro Kakunenryo Kaihatsu Jigyodan Cyclone dust collector
US5961675A (en) * 1998-03-25 1999-10-05 Korea Institute Of Energy Research High efficiency compact Cybagfilter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235610A (en) * 1978-05-22 1980-11-25 York-Shipley, Inc. Apparatus in the fabric filter control of air pollution
EP0841095A2 (en) * 1996-11-12 1998-05-13 Doryokuro Kakunenryo Kaihatsu Jigyodan Cyclone dust collector
US5961675A (en) * 1998-03-25 1999-10-05 Korea Institute Of Energy Research High efficiency compact Cybagfilter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2042241A1 (en) 2007-09-28 2009-04-01 Htc Sweden Ab Separator device
EP3202482A1 (en) * 2016-02-02 2017-08-09 General Electric Technology GmbH A gas dryer for an electric machine
CN108043156A (en) * 2017-12-20 2018-05-18 郑州赫恩电子信息技术有限公司 A kind of dust-laden exhaust gas energy-efficient treatment device
CN108043156B (en) * 2017-12-20 2020-05-08 安徽轩鸣新材料有限公司 Energy-saving treatment device for dust-containing waste gas

Also Published As

Publication number Publication date
SE0401446L (en) 2005-09-27
SE526500C2 (en) 2005-09-27
SE0401446D0 (en) 2004-06-04

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