WO2023105881A1 - 集塵機及びその金属フィルタの再生方法 - Google Patents

集塵機及びその金属フィルタの再生方法 Download PDF

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Publication number
WO2023105881A1
WO2023105881A1 PCT/JP2022/034783 JP2022034783W WO2023105881A1 WO 2023105881 A1 WO2023105881 A1 WO 2023105881A1 JP 2022034783 W JP2022034783 W JP 2022034783W WO 2023105881 A1 WO2023105881 A1 WO 2023105881A1
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WO
WIPO (PCT)
Prior art keywords
metal filter
dust collector
metal
filter
temperature
Prior art date
Application number
PCT/JP2022/034783
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
浩司 三坂
Original Assignee
日本スピンドル製造株式会社
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 日本スピンドル製造株式会社 filed Critical 日本スピンドル製造株式会社
Priority to KR1020247015113A priority Critical patent/KR20240118754A/ko
Priority to JP2023566097A priority patent/JPWO2023105881A1/ja
Priority to CN202280075743.8A priority patent/CN118234555A/zh
Publication of WO2023105881A1 publication Critical patent/WO2023105881A1/ja

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    • 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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/10—Filter screens essentially made of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • 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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4263—Means for active heating or cooling
    • 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
    • B01D46/71—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 with pressurised gas, e.g. pulsed air
    • 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
    • B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
    • B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating only

Definitions

  • the present invention relates to a dust collector for removing foreign matter such as dust contained in gas and a method for regenerating its metal filter.
  • backwashing is performed by momentarily injecting high-pressure compressed air into each bag filter to periodically shake off and remove foreign matter adhering to the bag filter.
  • bag filters are generally made of cloth (non-woven fabric), even if backwashing is performed periodically, the performance of the bag filters will not recover and performance will deteriorate after long-term use. In the end, the bag filter that has been damaged must be discarded and replaced with a new one, resulting in a large economic loss.
  • Patent Document 2 the non-woven fabric filter is heated in the process of winding the non-woven fabric filter around a drive roller and a driven roller and circulating it, thereby reducing the viscosity of the oil mist contained in this non-woven fabric filter and increasing its fluidity.
  • a circulation-type filter regeneration mechanism has been proposed that regenerates a non-woven fabric filter by blowing compressed air onto the non-woven fabric filter to blow off oil mist.
  • Patent Document 3 proposes a method for cleaning a metal fiber filter used for forming a thermoplastic resin film. Specifically, this cleaning method includes a step of heating the metal fiber filter with steam, a step of immersing the metal fiber filter in acid or alkali, and a step of ultrasonically cleaning the metal fiber filter. This is a method for removing degraded resin.
  • the circulation-type filter regeneration mechanism proposed in Patent Document 2 mainly separates and removes oil mistakes contained in the non-woven fabric filter installed in the air purifier, and the non-woven fabric filter incorporates a complicated mechanism.
  • an apparatus having a large number of non-woven fabric filters has the problem of increasing the size and cost of the apparatus as a whole.
  • Patent Document 3 the method for cleaning a metal filter proposed in Patent Document 3 requires a plurality of steps including chemical treatment, and its application is limited to the formation of a thermoplastic resin film. Since it is not possible to reproduce the data as it is, there is a problem that the reproduction requires a lot of labor and time.
  • the present invention has been made in view of the above problems, and its object is to provide a dust collector that can be easily regenerated while the metal filter is attached to the dust collector, and a method for regenerating the metal filter.
  • a dust collector comprises a metal filter containing metal fibers, the interior of the main body is divided into a dust collection chamber and a purified gas chamber by a partition wall, and the metal filter is attached to the partition wall. It is characterized by comprising regeneration means for regenerating the metal filter while the metal filter is attached to the partition wall.
  • the regeneration means includes heating means for heating the metal filter to a temperature at which the metal fibers contained in the metal filter thermally expand to widen the gaps between the metal fibers, and the heating means It is composed of a heat medium supply means for supplying a heat medium into the metal filter.
  • the heat medium may be high-temperature, high-pressure steam
  • the heat-medium supply means may include a vertically movable injection nozzle for injecting the high-temperature, high-pressure steam into the metal filter.
  • the heating means may include drying means for drying the metal filter after being heated by the high-temperature/high-pressure steam by blowing pulsed air or dry air.
  • the heat medium supplied into the metal filter by the heat medium supply means may be high-temperature air
  • the dust collector may include a heat storage device that heats the air with stored heat.
  • the heating means may be configured by a power supply device that energizes a conductive metal retainer incorporated in the metal filter to cause the retainer to generate heat.
  • the method for regenerating a metal filter according to the present invention comprises: while the metal filter is attached to the partition wall of a dust collector, the metal filter is heated to a temperature at which the metal fibers contained in the metal filter thermally expand and the gaps between the metal fibers widen. characterized by heating to
  • the metal fiber contained in the metal filter is thermally expanded by a heating means (a heat medium supply means or a power supply device), and the metal fiber is Since it is heated to a temperature that widens the gaps between the metal fibers, the foreign matter that has entered the gaps between the metal fibers is effectively separated and removed. can be used.
  • a heating means a heat medium supply means or a power supply device
  • the metal filter is regenerated while attached to the dust collector, it is not necessary to remove the metal filter from the dust collector when regenerating the metal filter, and the metal filter can be regenerated easily and in a short time. Further, since the regenerating means is relatively simply constituted by the heating means such as the heat medium supply means and the power supply device, the size and cost of the dust collector are not increased.
  • FIG. 2 is a vertical cross-sectional view showing the state of the dust collector according to the present invention during normal operation (during dust collection);
  • FIG. 2 is an enlarged detailed cross-sectional view of a portion A in FIG. 1;
  • FIG. 4 is a vertical cross-sectional view showing a state of the dust collector according to the present invention during backwashing;
  • 1 is a longitudinal sectional view of a metal filter portion of a dust collector showing a method for regenerating a metal filter according to Embodiment 1 of the present invention;
  • FIG. (a) is a front view of the injection nozzle,
  • (b) is a sectional view taken along the line BB of (a), and
  • (c) is a sectional view taken along the line CC of (a).
  • FIG. 6 is a vertical cross-sectional view of a metal filter portion of a dust collector showing a method for regenerating a metal filter according to Embodiment 2 of the present invention
  • FIG. 10 is a vertical cross-sectional view of a metal filter portion of a dust collector showing a method for regenerating a metal filter according to Embodiment 3 of the present invention
  • FIG. 1 is a longitudinal sectional view showing the state of the dust collector according to the present invention during normal operation (during dust collection)
  • FIG. 2 is an enlarged detailed sectional view of part A in FIG. 1
  • FIG. 3 is a state of the dust collector during backwashing. It is a vertical cross-sectional view showing.
  • a dust collector 1 includes a main body (casing) 2 in the form of a sealed container. partitioned.
  • the volume of the dust collection chamber S1 is set to be larger than the volume of the purified gas chamber S2, and the lower portion of the main body 2 is shaped like a funnel that tapers downward and opens at its lower end.
  • a rotary valve 4 is provided at the foreign matter discharge port 2a.
  • a gas inflow pipe 5 is connected to an intermediate height position on the side of the main body 2, and one end of the gas inflow pipe 5 is connected to a blast furnace, an electric furnace, a waste treatment furnace, etc. (not shown) for discharging gas. , and the other end is connected to the body 2 of the dust collector 1 as described above and opens to the dust collection chamber S1 in the body 2 .
  • each metal filter 6 is vertically suspended with its upper end supported by the partition wall 3, and as shown in FIG.
  • a cylindrical frame-shaped (cage-shaped) retainer 7 for the purpose is incorporated and housed from above.
  • the metal filter 6 is manufactured by implanting metal fibers (short fibers) of stainless steel (SUS), titanium, aluminum or the like into a base material such as nylon felt or polyester felt by needle punching.
  • the retainer 7 is made of a conductive metal such as stainless steel (SUS), iron, or aluminum, which has a relatively high electric resistance.
  • a gas outflow pipe 8 is connected to the side of the purified gas chamber S2 formed in the upper part of the main body 2, and one end of this gas outflow pipe 8 opens into the purified gas chamber S2. , the other end is connected to the suction fan 9 .
  • the dust collector 1 is provided with a backwashing device 10 for periodically brushing off and removing foreign matter such as dust adhering to the outer peripheral surface of each metal filter 6 using high-pressure compressed air.
  • the backwash device 10 includes a compressed air supply source 11 such as a compressor installed outside the main body 2 and an injector pipe 12 extending from the compressed air supply source 11 .
  • the injector pipe 12 is introduced into a purified gas chamber S2 formed in the upper portion of the main body 2 and extends horizontally in the purified gas chamber S2.
  • An on-off valve 13 is provided between them.
  • a plurality of positions of the portion of the injector pipe 12 inserted into the main body 2 are opened toward the upper end openings 6a of the respective metal filters 6.
  • An air nozzle 16 is attached to each.
  • the injector pipe 12 is made of SGP pipe (carbon steel pipe for piping), SUS pipe (stainless steel pipe), or the like.
  • This regeneration means is composed of a heating means, as will be described in each embodiment of the regeneration method described later, and this heating means heats a heat medium (high-temperature/high-pressure steam or high-temperature air) inside the metal filter 6. It is composed of a steam generator 20 (see FIG. 4), a heat storage device 30 (see FIG. 6), and a power supply device 40 (see FIG. 7) as a heat medium supply means for supplying to the .
  • the gas that has flowed into the dust collection chamber S2 passes through each of the plurality of metal filters 6, and foreign matter such as dust contained therein is collected by each of the metal filters 6. It adheres to the outer peripheral surface.
  • the gas from which foreign matter has been removed by the metal filter 6 and purified is discharged from the upper end opening 6a of each metal filter 6 into the purified gas chamber S2 as indicated by the arrow in FIG. 8, it flows out of the main body 2, is sucked by a suction fan 9, and is delivered to a processing device (not shown).
  • FIG. 3 is a longitudinal sectional view showing the state of the dust collector 1 according to the present invention during backwashing.
  • Backwashing of each metal filter 6 is performed by driving the backwashing device 10 as follows. That is, when a compressed air supply source 11 such as a compressor (not shown) is driven and an open/close valve 13 is opened, high-pressure compressed air discharged from the compressed air supply source 11 flows through the injector pipe 12 in the direction of the arrow shown. The air is jetted instantaneously from the air nozzle 14 toward the upper end opening 6a of each metal filter 6, respectively.
  • a compressed air supply source 11 such as a compressor (not shown)
  • an open/close valve 13 is opened
  • high-pressure compressed air discharged from the compressed air supply source 11 flows through the injector pipe 12 in the direction of the arrow shown.
  • the air is jetted instantaneously from the air nozzle 14 toward the upper end opening 6a of each metal filter 6, respectively.
  • each metal filter 6 is brushed off and removed by the compressed air.
  • Foreign matter such as dust removed from the outer peripheral surface of each metal filter 6 falls in the dust collection chamber S2 as indicated by the arrow in FIG. is opened, the foreign matter is discharged from the foreign matter outlet 2a to the outside of the main body 2 and collected.
  • the purification performance of the metal filter 6 is recovered to some extent by the backwashing described above, but if the purification performance of the metal filter 6 is not recovered by this backwashing, the metal filter 6 is regenerated by the regeneration means as described above. be.
  • the metal filter 6 is regenerated when the differential pressure between the inside and outside of the metal filter 6 exceeds a predetermined value (for example, 1.5 KPa), or periodically (for example, every three years).
  • FIG. 4 is a vertical cross-sectional view of the metal filter portion of the dust collector showing the method for regenerating the metal filter according to Embodiment 1 of the present invention
  • FIG. 5(a) is a front view of the injection nozzle
  • FIG. A) is a cross-sectional view taken along line BB
  • FIG. 5(c) is a cross-sectional view taken along line CC of FIG. 5(a).
  • the heating means is constituted by the heat medium supply means
  • the heat medium supply means is constituted by the steam generator 20 that supplies high-temperature, high-pressure steam as the heat medium to the inside of the metal filter 6. ing.
  • a pipe 21 extends from the steam generator 20. When regenerating the metal filter 6, as shown in FIG. It is inserted into the inside of the filter 6 (retainer 7) from above. Here, an injection nozzle 22 is attached to the tip of the pipe 21 for injecting high-temperature, high-pressure steam to the surroundings.
  • the injection nozzle 22 is constructed by connecting two upper and lower discs 22A and 22B together with a cylindrical side wall 22C.
  • the tip of the pipe 21 is inserted into and fixed to the center of the upper disk 22A, and the side wall 22C is provided with a plurality (eight in the illustrated example) of circular injection holes 22a. It penetrates with an equal angular pitch (45° pitch) in the direction.
  • the number of injection holes 22a is eight, but the number of injection holes 22a may be any number as long as it is plural.
  • a pipe 21 is inserted into the metal filter 6 (retainer 7) together with an injection nozzle 22 attached to its tip from above.
  • the injection nozzle 22 inserted inside the metal filter 6 is opened.
  • High-temperature, high-pressure steam is jetted toward the periphery from a plurality of injection holes 22a, and the metal filter 6 is uniformly heated over the entire length in the circumferential direction and the vertical direction by the high-temperature, high-pressure steam being sprayed on the inner periphery. be done.
  • the metal filter 6 when the metal filter 6 is heated by high-temperature/high-pressure steam, the metal fibers contained in the metal filter 6 thermally expand and the gaps between the metal fibers widen. The attached deposits are effectively separated, and the separated deposits are blown away by the high-temperature, high-pressure steam passing through the metal filter 6 and removed. For this reason, the metal filter 6 whose purification performance has deteriorated due to the attachment of deposits is regenerated, and the regenerated metal filter 6 is used again.
  • the metal filter 6 Since the metal filter 6 is regenerated while attached to the partition wall 3 of the dust collector 1, there is no need to remove the metal filter 6 from the dust collector 1 when regenerating the metal filter 6. Filter 6 can be regenerated. Further, since the regenerating means is relatively simply composed of the steam generator 20, the pipe 21, and the injection nozzle 22, which are the heat medium supplying means, the dust collector 1 does not increase in size and cost.
  • FIG. 6 is a vertical cross-sectional view of a metal filter portion of a dust collector showing a method for regenerating a metal filter according to Embodiment 2 of the present invention.
  • the same elements as those shown in FIG. and a repetitive description thereof will be omitted.
  • the heat medium supply means as the heating means is composed of the heat storage device 30 that supplies high temperature air as the heat medium to the inside of the metal filter 6 .
  • the heat storage device 30 includes a latent heat storage material that liquefies at a temperature equal to or higher than the melting point and stores heat. It has the function of heating the air with the heat generated and generating high-temperature air.
  • High-temperature air generated by heating the air by the heat storage device 30 is supplied to the injection nozzle 22 through the pipe 21 in the same manner as in the first embodiment.
  • the metal filter 6 is manually moved up and down inside the metal filter 6 as indicated by arrows in FIG. For this reason, the metal filter 6 whose inner peripheral portion is blown with high-temperature air is uniformly heated over the entire length in the circumferential direction and the vertical direction.
  • the metal filter 6 when the metal filter 6 is heated by high-temperature air, the metal fibers contained in the metal filter 6 thermally expand and the gaps between the metal fibers widen. The deposited deposits are effectively separated and the separated deposits are blown away from the metal filter 6 by the hot air passing through the metal filter 6 . As a result, the metal filter 6 whose performance has deteriorated is regenerated, and the regenerated metal filter 6 can be used continuously.
  • FIG. 7 is a longitudinal sectional view of a metal filter portion of a dust collector showing a method for regenerating a metal filter according to Embodiment 3 of the present invention. They are given the same reference numerals and will not be described again below.
  • the heating means is composed of a power supply device 40 that energizes the retainer 7 made of a conductive metal incorporated in the metal filter 6 to cause the retainer 7 to generate heat.
  • the retainer 7 is made of a conductive metal such as stainless steel (SUS), iron, or aluminum, which has a high electric resistance.
  • a low-voltage, high-current type power supply device 40 is used, and a feeder line 41 extending from the power supply device 40 is inserted into the metal filter 6 and the retainer 7 from above.
  • a weight 42 attached to the tip (lower end) of the feeder line 41 is in contact with the lower end of the retainer 7 .
  • the weight 42 is made of a conductive metal such as iron, when the weight 42 contacts the retainer 7 also made of a conductive metal, the weight 42 and the retainer 7 are electrically connected. Conduction is established, and the retainer 7 and the power supply device 40 are electrically connected via the feeder line 41 . Also, the retainer 7 is grounded through the ground wire 43 .
  • the weight 42 may be made of a magnet and the weight 42 may be magnetically attracted to the retainer 7 .
  • the regeneration method according to the present embodiment similarly to the first and second embodiments, there is no need to dispose of the metal filter 6 whose performance has deteriorated as in the conventional method, thereby preventing waste of resources and environmental pollution. be able to.
  • the same effects as those of the first and second embodiments can be obtained in this embodiment as well.
  • regeneration is performed for each metal filter 6 .
  • the steam generator 20 that supplies high-temperature/high-pressure steam to the inside of the metal filter 6 and the heat storage device 30 that supplies high-temperature air to the inside of the metal filter 6 are used as examples of heat medium supply means, which are heating means.
  • heat medium supply means any other means for supplying any heat medium other than high-temperature/high-pressure steam or high-temperature air into the metal filter 6 can be used.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
PCT/JP2022/034783 2021-12-08 2022-09-16 集塵機及びその金属フィルタの再生方法 WO2023105881A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020247015113A KR20240118754A (ko) 2021-12-08 2022-09-16 집진기 및 그 금속필터의 재생방법
JP2023566097A JPWO2023105881A1 (enrdf_load_stackoverflow) 2021-12-08 2022-09-16
CN202280075743.8A CN118234555A (zh) 2021-12-08 2022-09-16 集尘机及其金属过滤器的再生方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021199283 2021-12-08
JP2021-199283 2021-12-08

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WO2023105881A1 true WO2023105881A1 (ja) 2023-06-15

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PCT/JP2022/034783 WO2023105881A1 (ja) 2021-12-08 2022-09-16 集塵機及びその金属フィルタの再生方法

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JP (1) JPWO2023105881A1 (enrdf_load_stackoverflow)
KR (1) KR20240118754A (enrdf_load_stackoverflow)
CN (1) CN118234555A (enrdf_load_stackoverflow)
WO (1) WO2023105881A1 (enrdf_load_stackoverflow)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09187613A (ja) * 1995-12-29 1997-07-22 Glatt Gmbh ガスを除塵するための装置ならびに該装置のフィルタを浄化するための方法
JP2003334414A (ja) * 2002-05-20 2003-11-25 Hosokawa Micron Corp フィルタの洗浄方法
JP2004041941A (ja) * 2002-07-12 2004-02-12 Mitsui Eng & Shipbuild Co Ltd フィルタ部材

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008068152A (ja) 2006-09-11 2008-03-27 Ooden:Kk 循環型フィルタ再生機構、該循環型フィルタ再生機構を備えたフィルタユニット、空気浄化装置及び循環型フィルタ再生方法
JP2008296128A (ja) 2007-05-31 2008-12-11 Nippon Spindle Mfg Co Ltd バグ式集塵機
JP7057633B2 (ja) 2017-07-07 2022-04-20 富士フイルム株式会社 金属繊維フィルタの洗浄方法、金属繊維フィルタおよび熱可塑性樹脂フィルムの製膜方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09187613A (ja) * 1995-12-29 1997-07-22 Glatt Gmbh ガスを除塵するための装置ならびに該装置のフィルタを浄化するための方法
JP2003334414A (ja) * 2002-05-20 2003-11-25 Hosokawa Micron Corp フィルタの洗浄方法
JP2004041941A (ja) * 2002-07-12 2004-02-12 Mitsui Eng & Shipbuild Co Ltd フィルタ部材

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KR20240118754A (ko) 2024-08-05
CN118234555A (zh) 2024-06-21

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