CN118234555A - Dust collector and method for regenerating metal filter thereof - Google Patents
Dust collector and method for regenerating metal filter thereof Download PDFInfo
- Publication number
- CN118234555A CN118234555A CN202280075743.8A CN202280075743A CN118234555A CN 118234555 A CN118234555 A CN 118234555A CN 202280075743 A CN202280075743 A CN 202280075743A CN 118234555 A CN118234555 A CN 118234555A
- Authority
- CN
- China
- Prior art keywords
- metal filter
- metal
- dust collector
- filter
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 202
- 239000002184 metal Substances 0.000 title claims abstract description 202
- 239000000428 dust Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 238000011069 regeneration method Methods 0.000 claims abstract description 21
- 230000008929 regeneration Effects 0.000 claims abstract description 16
- 238000005338 heat storage Methods 0.000 claims abstract description 13
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 238000010926 purge Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 30
- 238000011010 flushing procedure Methods 0.000 description 17
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 10
- 239000004745 nonwoven fabric Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
Abstract
The invention provides a dust collector and a method for regenerating a metal filter, which can simply regenerate the metal filter in a state that the metal filter is mounted on the dust collector. A dust collector (1) is provided with a metal filter (6) containing metal fibers, wherein the interior area of a main body (2) is divided into a dust collection chamber (S1) and a purge gas chamber (S2) by a partition plate (3), the metal filter (6) which is opened to the purge gas chamber (S1) is mounted on the partition plate (3), and the dust collector (1) is provided with a regeneration mechanism which regenerates the metal filter (6) in a state that the metal filter (6) is mounted on the partition plate (3). The regeneration means is constituted by a heating medium supply means such as a steam generator (20) or a heat storage device (30), or by a heating means constituted by a power supply device (40). In addition, in the method for regenerating a metal filter (6) according to the present invention, the metal filter (6) is heated to a temperature at which the metal fibers contained in the metal filter (6) thermally expand and the gaps between the metal fibers are widened in a state in which the metal filter (6) is mounted on a separator (3) of a dust collector (1).
Description
Technical Field
The present invention relates to a dust collector for removing foreign matter such as dust contained in a gas and a method for regenerating a metal filter thereof.
Background
For example, since various gases discharged from a blast furnace, an electric furnace, a waste treatment furnace, or the like contain foreign substances such as dust, the foreign substances are removed by a dust collector.
In the dust collector, an external filtration type bag filter is generally used (for example, refer to patent document 1), but in this dust collector, a gas flows from the outside to the inside of a bag filter having a bottom cylindrical shape (bag shape), and foreign matter contained in the gas is removed (collected). Therefore, as dust collection proceeds, foreign matter adheres to the outer peripheral surface of the filter, and the ventilation resistance (pressure loss) of the gas passing through the bag filter increases, so that the cleaning ability of the dust collector decreases.
In this case, a back flushing operation is performed in which high-pressure compressed air is instantaneously injected into the bag filter to periodically remove foreign matters adhering to the bag filter.
However, since a bag filter is usually a filter made of cloth (nonwoven fabric), even if back flushing is performed regularly, the performance of the bag filter cannot be recovered if the bag filter is used for a long period of time, and eventually the filter with reduced performance has to be discarded and replaced with a new filter, which has a problem of great economic loss.
Accordingly, patent document 2 proposes a circulating filter regeneration mechanism that heats a nonwoven fabric filter while the nonwoven fabric filter is wound around a driving roller and a driven roller to circulate the filter, thereby reducing the viscosity of oil mist contained in the nonwoven fabric filter to improve the fluidity thereof, and blows compressed air to the nonwoven fabric filter to blow away the oil mist to regenerate the nonwoven fabric filter.
Patent document 3 proposes a technique related to a cleaning method of a metal fiber filter used for forming a thermoplastic resin film. Specifically, the cleaning method is a method of removing aged substances of a resin contained in a metal fiber filter by a step of heating the metal fiber filter with steam, a step of immersing the metal fiber filter in an acid or an alkali, and a step of ultrasonically cleaning the metal fiber filter.
Technical literature of the prior art
Patent literature
Patent document 1: japanese patent laid-open No. 2008-296128
Patent document 2: japanese patent laid-open No. 2008-068152
Patent document 3: japanese patent laid-open No. 2019-013890
Disclosure of Invention
Technical problem to be solved by the invention
However, the circulating filter regeneration mechanism proposed in patent document 2 mainly separates and removes oil mist contained in a nonwoven fabric filter provided in an air purification device, and since a complicated mechanism is incorporated in the nonwoven fabric filter, there is a problem that the device including a plurality of nonwoven fabric filters is large in size and high in cost as a whole.
Further, the cleaning method of the metal filter proposed in patent document 3 requires a plurality of steps including chemical treatment, and uses thereof are limited to film formation of a thermoplastic resin film, and it is impossible to perform regeneration in a state where the metal filter is mounted in a device, so there is a problem that much effort and time are required for regeneration.
The present invention has been made in view of the above-described problems, and an object thereof is to provide a dust collector and a method for regenerating a metal filter thereof, which can easily regenerate the metal filter in a state where the metal filter is attached to the dust collector.
Means for solving the technical problems
In order to achieve the above object, a dust collector according to the present invention includes a metal filter including metal fibers, the metal filter being attached to a partition plate, and an interior of a main body is partitioned into a dust collection chamber and a purge gas chamber by the partition plate, and the dust collector includes a regeneration mechanism that regenerates the metal filter in a state in which the metal filter is attached to the partition plate.
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 and gaps between the metal fibers are widened, and the heating means includes heating medium supply means for supplying a heating medium into the metal filter. In this case, the heating medium may be high-temperature high-pressure steam, and the heating medium supply means may include a nozzle capable of moving up and down for injecting the high-temperature high-pressure steam into the metal filter. The heating means may further include a drying means for drying the metal filter heated by the high-temperature high-pressure steam by blowing pulse air or dry air.
The heat medium supplied into the metal filter by the heat medium supply means may be high-temperature air, and the dust collector may include a heat storage device that heats air by heat stored in the heat storage device.
The heating means may be constituted by a power supply device for energizing a conductive metal holder incorporated in the metal filter to heat the holder.
In the method for regenerating a metal filter according to the present invention, the metal filter is heated to a temperature at which the metal fibers contained in the metal filter thermally expand and gaps between the metal fibers are widened in a state in which the metal filter is mounted on a separator of a dust collector.
Effects of the invention
According to the present invention, in a state in which the metal filter is mounted on the separator of the dust collector, the metal filter is heated by the heating means (the heating medium supply means or the power supply means) to a temperature at which the metal fibers contained in the metal filter expand to expand the gaps between the metal fibers, and therefore, foreign matter entering the gaps between the metal fibers can be effectively separated and removed, and the metal filter having reduced performance due to the adhesion of foreign matter can be regenerated, so that the metal filter can be reused.
Therefore, it is not necessary to discard a metal filter having lowered performance as in the prior art, and it is possible to prevent waste of resources and environmental pollution. Further, since the metal filter is regenerated in a state of being attached to the dust collector, the metal filter can be regenerated in a short time simply without removing the metal filter from the dust collector when regenerating the metal filter. Further, since the regenerating means is constituted by a relatively simple structure of the heating means such as the heating medium supply means and the power supply means, the dust collector does not increase in size or cost.
Drawings
Fig. 1 is a longitudinal sectional view showing a state of the dust collector according to the present invention during normal operation (dust collection).
Fig. 2 is an enlarged detailed sectional view of a portion a of fig. 1.
Fig. 3 is a longitudinal sectional view showing a state of the dust collector according to the present invention at the time of back flushing.
Fig. 4 is a longitudinal sectional view of a metal filter part of a dust collector showing a method for regenerating a metal filter according to embodiment 1 of the present invention.
Fig. 5 (a) is a front view of the nozzle, (B) is a cross-sectional view taken along line B-B of (a), and (C) is a cross-sectional view taken along line C-C of (a).
Fig. 6 is a longitudinal sectional view of a metal filter part of a dust collector showing a method for regenerating a metal filter according to embodiment 2 of the present invention.
Fig. 7 is a longitudinal sectional view of a metal filter part of a dust collector showing a method for regenerating a metal filter according to embodiment 3 of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[ Dust collector ]
First, the configuration of the dust collector according to the present invention will be described with reference to fig. 1 to 3.
Fig. 1 is a longitudinal sectional view showing a state of a dust collector according to the present invention during normal operation (dust collection), fig. 2 is an enlarged detailed sectional view of a portion a of fig. 1, and fig. 3 is a longitudinal sectional view showing a state of the dust collector during back flushing.
The dust collector 1 according to the present invention includes a closed container-shaped main body (housing) 2, and the interior of the main body 2 is partitioned into a lower dust collection chamber S1 and an upper purge gas chamber S2 by a horizontal partition plate 3. The volume of the dust collection chamber S1 is set to be larger than the volume of the purge gas chamber S2, and the lower portion of the main body 2 is funnel-shaped so as to taper downward, and a rotary valve 4 is provided at a foreign matter discharge port 2a opened at the lower end portion thereof. A gas inflow pipe 5 is connected to a middle height position of the side portion 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, or the like, not shown, that discharges gas, while the other end is connected to the main body 2 of the dust collector 1 as described above and is opened to a dust collection chamber S1 in the main body 2.
A plurality of metal filters 6 in a bottomed tubular shape (bag shape) with a closed lower end are accommodated in the dust collection chamber S1 in the main body 2. Here, each metal filter 6 is suspended vertically in a state in which the upper end portion thereof is supported by the partition plate 3, and as shown in fig. 2, a cylindrical frame-like (cage-like) holder 7 for holding the shape of the metal filter 6 is assembled from above into the inside of the metal filter so as to be accommodated therein. The metal filter 6 is manufactured by, for example, needling metal fibers (short fibers) such as stainless steel (SUS), titanium, or aluminum into a base material such as nylon felt or polyester felt. As a material of the holder 7, a conductive metal such as stainless steel (SUS), iron, or aluminum having a large electric resistance is used.
On the other hand, a gas outflow pipe 8 is connected to a side portion of a purge gas chamber S2 formed in an upper portion of the main body 2, and one end of the gas outflow pipe 8 is opened in the purge gas chamber S2 and the other end is connected to an intake fan 9.
The dust collector 1 according to the present invention is provided with a back flushing device 10, and the back flushing device 10 is used for removing foreign matters such as dust attached to the outer peripheral surface of each metal filter 6 by periodically brushing off the foreign matters using high-pressure compressed air. The backwash device 10 includes: a compressor or the like air supply source 11 provided outside the main body 2; and an ejector tube 12 extending from the compressed air supply source 11.
The injection pipe 12 is introduced into a purge gas chamber S2 formed in an upper portion of the main body 2, and extends horizontally in the purge gas chamber S2, and an on-off valve 13 is provided between the main body 2 and the compressed air supply source 11 in the injection pipe 12. Further, air nozzles 16 that open toward the upper end openings 6a of the respective metal filters 6 are attached to a plurality of portions (positions facing the upper end openings 6a of the respective metal filters 6) of the injection pipe 12 at portions inserted into the main body 2. In the present embodiment, an SGP pipe (carbon steel pipe for piping), an SUS pipe (stainless steel pipe), or the like is used as the injection pipe 12.
In the dust collector 1 according to the present invention, when the cleaning performance of the metal filter 6 is reduced due to clogging caused by the adhesion of foreign matter, the foreign matter is removed by back flushing, which will be described later, but when the cleaning performance of the metal filter 6 is reduced due to long-term use and the cleaning performance of the metal filter 6 cannot be recovered by back flushing, the metal filter 6 does not need to be discarded, and a regeneration mechanism for regenerating the metal filter 6 in a state where it is attached to the dust collector 1 (separator 3) is provided. As described in the embodiments of the regeneration method described later, the regeneration means is constituted by heating means constituted by internal heating medium supply means (i.e., the steam generator 20 (see fig. 4) or the heat storage device 30 (see fig. 6)) or the power supply device 40 (see fig. 7) that supplies heating medium (high-temperature high-pressure steam or high-temperature air) to the metal filter 6 (details will be described later).
Next, the operation of the dust collector 1 configured as described above in normal operation (dust collection) and in back flushing will be described.
1) Function in normal operation (dust collection):
As shown in fig. 1, when the dust collector 1 is operating normally (dust collection), the rotary valve 4 provided at the lower end portion of the main body 2 is closed, and the backwash device 10 is in a stopped (non-operating) state. In this state, when the suction fan 9 is rotationally driven, both the dust collection chamber S1 and the purge gas chamber S2 in the main body 2 are brought into negative pressure, and gas discharged from a waste disposal furnace or the like, not shown, is sucked by the negative pressure, and flows into the dust collection chamber S1 in the main body 2 from the gas inflow pipe 5 as indicated by an arrow in fig. 1.
As described above, the gas flowing into the dust collection chamber S1 passes through the plurality of metal filters 6, and foreign matter such as dust contained in the gas is trapped by the metal filters 6 and adheres to the outer peripheral surfaces of the metal filters 6. The gas purified by removing the foreign matter by the metal filters 6 is discharged from the upper end openings 6a of the metal filters 6 to the clean gas chamber S2, and flows out of the main body 2 through the gas outflow pipe 8, is sucked by the suction fan 9, and is sent to a processing apparatus not shown, as indicated by arrows in fig. 1.
When the dust collecting operation is repeated, foreign matter such as dust gradually adheres to and accumulates on the outer peripheral surfaces of the metal filters 6, which increases the ventilation resistance of the gas passing through the metal filters 6. When a pressure gauge, not shown, detects that the ventilation resistance of the gas passing through each metal filter 6 has reached a predetermined value or when a predetermined time has elapsed, the backwashing device 10 is driven to backwash each metal filter 6 with compressed air.
Next, the operation of the dust collector 1 at the time of the back flushing will be described with reference to fig. 3.
2) The effect during back flushing is as follows:
Fig. 3 is a longitudinal sectional view showing a state of the dust collector 1 according to the present invention during back flushing, and back flushing of each metal filter 6 is performed by driving the back flushing device 10 as follows. That is, when the compressed air supply source 11 such as a compressor, not shown, is driven and the on-off valve 13 is opened, the high-pressure compressed air discharged from the compressed air supply source 11 flows through the injection pipe 12 and is instantaneously injected from each air nozzle 14 toward the upper end opening 6a of each metal filter 6. In this way, the foreign matter adhering to the outer peripheral surface of each metal filter 6 is removed by being brushed off by the compressed air. Further, foreign matter such as dust scattered from the outer peripheral surface of each metal filter 6 falls down in the dust collection chamber S1 as shown by an arrow in fig. 3, is collected in the lower portion of the main body 2, and is discharged from the foreign matter discharge port 2a to the outside of the main body 2 by opening the rotary valve 4, and is collected.
The above-described back flushing can restore the cleaning performance of the metal filter 6 to some extent, but in the case where the cleaning performance of the metal filter 6 cannot be restored by the back flushing, the metal filter 6 is regenerated by the regenerating means as described above. The regeneration of the metal filter 6 is performed when the internal-external pressure difference of the metal filter 6 exceeds a predetermined value (for example, 1.5 KPa), or the regeneration of the metal filter 6 is performed periodically (for example, every three years).
[ Method for regenerating Metal Filter ]
The method for regenerating a metal filter 6 according to the present invention is characterized in that the metal filter 6 is heated to a temperature at which the metal fibers contained in the metal filter 6 thermally expand and the gaps between the metal fibers are widened in a state where the metal filter 6 is mounted on a dust collector 1 (separator 3). Hereinafter, a method for regenerating the metal filter 6 will be described according to each embodiment.
Embodiment 1
Fig. 4 is a longitudinal sectional view of a metal filter part of a dust collector showing a method for regenerating a metal filter according to embodiment 1 of the present invention, fig. 5 (a) is a front view of a nozzle, fig. 5 (B) is a sectional view taken along line B-B in fig. 5 (a), and fig. 5 (C) is a sectional view taken along line C-C in fig. 5 (a).
In the present embodiment, the heating means is constituted by a heating medium supply means constituted by a steam generator 20 that supplies high-temperature and high-pressure steam as a heating medium into the metal filter 6.
When the metal filter 6 is regenerated, as shown in fig. 4, the pipe 21 extends from the steam generator 20, and the end of the pipe 21 is inserted into the metal filter 6 from above in a state where the metal filter 6 (the holder 7) is attached to the separator 3. Here, a nozzle 22 for injecting high-temperature and high-pressure steam to the surroundings is installed at the end of the pipe 21.
As shown in fig. 5, the nozzle 22 is integrally formed by connecting upper and lower disks 22A and 22B with a cylindrical side wall 22C. A distal end portion of the tube 21 is inserted into and fixed to the center of the upper disc 22A, and a plurality of (eight in the illustrated example) circular hole-shaped injection holes 22A are formed in the side wall 22C at equal angular intervals (45 ° intervals) in the circumferential direction. In the present embodiment, the number of the injection holes 22a is eight, but any number of the injection holes 22a may be used as long as it is a plurality of the injection holes.
As shown in fig. 4, when the pipe 21 is inserted into the metal filter 6 (the holder 7) from above together with the nozzle 22 attached to the distal end thereof and the pipe 21 and the nozzle 22 are supplied to the pipe 21 while being moved up and down manually or automatically in the metal filter 6, the high-temperature and high-pressure steam generated in the steam generator 20 is ejected from the plurality of ejection holes 22a opened in the nozzle 22 inserted into the metal filter 6 toward the periphery, and the high-temperature and high-pressure steam is ejected to the inner peripheral portion, and the entire circumference and the entire up-down direction of the metal filter 6 are heated uniformly. In this way, when the metal filter 6 is heated by the high-temperature and high-pressure steam, the metal fibers contained in the metal filter 6 thermally expand, and the gaps between the metal fibers are enlarged, so that the adhering matter that has entered and adhered to the gaps between the metal fibers is effectively separated, and the separated adhering matter is blown away by the high-temperature and high-pressure steam passing through the metal filter 6 and removed. Therefore, the metal filter 6 having a decreased purification performance due to the adhesion of the attached matter is regenerated, and the regenerated metal filter 6 is reused.
Therefore, the metal filter 6 having a lowered purification performance does not need to be discarded as in the prior art, and waste of resources and environmental pollution can be prevented. Further, since the metal filter 6 is regenerated in a state of being attached to the partition plate 3 of the dust collector 1, the metal filter 6 can be regenerated in a short time simply without removing the metal filter 6 from the dust collector 1 when the metal filter 6 is regenerated. The regeneration mechanism is constituted by a relatively simple structure of the heat medium supply mechanism (i.e., the steam generator 20), the pipe 21, and the nozzle 22, and therefore does not cause an increase in the size or cost of the dust collector 1.
In the present embodiment, if the drying means for blowing the pulse air or the dry air to dry the metal filter 6 wet by blowing the high-temperature and high-pressure steam is provided, it is possible to prevent foreign matter from adhering to the metal filter 6.
The regeneration of the metal filters 6 by the injection of the high-temperature high-pressure steam is performed for each metal filter 6.
< Embodiment 2 >
Next, a method for regenerating a metal filter according to embodiment 2 of the present invention will be described with reference to fig. 6.
Fig. 6 is a longitudinal sectional view of a metal filter part of a dust collector showing a method for regenerating a metal filter according to embodiment 2 of the present invention, and in fig. 6, the same elements as those shown in fig. 4 are denoted by the same reference numerals, and a repetitive description thereof will be omitted.
In the present embodiment, the heating medium supply means as the heating means is constituted by the heat storage device 30 that supplies high-temperature air as the heating medium to the inside of the metal filter 6. Here, the heat storage device 30 includes a latent heat storage material that liquefies and stores heat at a temperature equal to or higher than the melting point, and for example, the heat storage device 30 functions as follows: waste heat discharged from a blast furnace, an electric furnace, a waste treatment furnace, or the like is stored and the air is heated by the stored heat to generate high-temperature air.
The high-temperature air generated by heating the air in the heat storage device 30 is supplied to the nozzle 22 through the pipe 21 in the same manner as in embodiment 1, and when the pipe 21 and the nozzle 22 attached to the distal end thereof are manually moved up and down inside the metal filter 6, the high-temperature air is injected from the plurality of injection holes 22a (see fig. 5) opened in the nozzle 22 to the surroundings. Therefore, the high-temperature air is blown to the inner peripheral portion of the metal filter 6 and uniformly heated in the entire circumferential direction and the entire vertical direction.
As described above, when the metal filter 6 is heated by the high-temperature air, the metal fibers contained in the metal filter 6 thermally expand, and the gaps between the metal fibers are enlarged, so that the adhering matter that has entered and clogged the gaps between the metal fibers is effectively separated, and the separated adhering matter is blown away by the high-temperature air passing through the metal filter 6 and removed from the metal filter 6. As a result, the metal filter 6 having reduced performance is regenerated, and the regenerated metal filter 6 can be used continuously.
Therefore, according to the regeneration method of the present embodiment, the metal filter 6 having reduced performance as in the prior art does not need to be discarded, and waste of resources and environmental pollution can be prevented. In addition, in the present embodiment, the same effects as those of embodiment 1 described above can be obtained. In the regeneration method according to the present embodiment, the metal filters 6 are also regenerated individually.
Embodiment 3
Next, a method for regenerating a metal filter according to embodiment 3 of the present invention will be described with reference to fig. 7.
Fig. 7 is a longitudinal sectional view of a metal filter part of a dust collector showing a method for regenerating a metal filter according to embodiment 3 of the present invention, and in fig. 7, the same reference numerals are given to the same elements as those shown in fig. 4 and 6, and a repetitive description thereof will be omitted.
In the present embodiment, the heating means is constituted by the power supply device 40 that energizes the conductive metal holder 7 incorporated in the metal filter 6 to heat the holder 7. The holder 7 is made of a conductive metal such as stainless steel (SUS), iron, or aluminum, which has high electric resistance.
In the present embodiment, a low-voltage high-current power supply device is used as the power supply device 40, and a power supply line 41 extending from the power supply device 40 is inserted into the metal filter 6 and the holder 7 from above. A weight 42 attached to the distal end (lower end) of the power feeding line 41 is in contact with the lower end portion of the holder 7. Since the weight 42 is made of a conductive metal such as iron, when the weight 42 is in contact with the holder 7 made of the conductive metal, the weight 42 and the holder 7 are electrically connected, and the holder 7 and the power supply device 40 are electrically connected via the power supply line 41. The holder 7 is grounded via a ground wire 43. The weight 42 may be constituted by a magnet, and the weight 42 may be magnetically attracted to the holder 7.
When regenerating the metal filter 6 according to the method according to the present embodiment, as shown in fig. 7, the power supply device 40 is electrically connected to the holder 7 via the power supply line 41, and the holder 7 is grounded via the ground line 43. Then, when electricity is supplied from the power supply device 40 to the holder 7 via the power supply line 41 in this state, the holder 7 functions as an electric heater and generates heat. Therefore, the metal filter 6 is uniformly heated by the holder 7 from the inside in the circumferential direction and the up-down direction, and the metal fibers contained in the metal filter 6 thermally expand, and the gaps between the metal fibers are widened. As a result, the adhering matter that has entered the gaps between the metal fibers of the metal filter 6 can be effectively separated and removed, and the metal filter 6 whose performance has been degraded by the adhering matter can be regenerated, so that the metal filter 6 can be reused.
Therefore, according to the regeneration method of the present embodiment, as in the case of embodiment 1 and embodiment 2, the metal filter 6 having reduced disposal performance as in the prior art is not required, and waste of resources and environmental pollution can be prevented. In addition, in the present embodiment, the same effects as those of embodiment 1 and embodiment 2 described above can be obtained. In the regeneration method according to the present embodiment, the metal filters 6 are also regenerated individually.
While the heating means (i.e., the heating medium supply means) has been described above as an example of the steam generator 20 that supplies high-temperature and high-pressure steam into the metal filter 6 and the heat storage device 30 that supplies high-temperature air into the metal filter 6, any other means that supplies any heating medium other than high-temperature and high-pressure steam or high-temperature air into the metal filter 6 may be used as the heating medium supply means.
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical ideas described in the claims, the specification, and the drawings.
Symbol description
1-Dust collector, 2-main body, 3-partition, 4-rotary valve, 5-gas inflow pipe, 6-metal filter, upper end opening of 6 a-metal filter, 7-retainer, 8-gas outflow pipe, 9-suction fan, 10-back flushing device, 11-compressed air supply source, 12-jet pipe, 13-on-off valve, 14-air tap, 20-steam generator (heating mechanism), 21-pipe, 22-nozzle, 30-heat storage device (heating mechanism), 40-power supply device (heating mechanism), 41-power supply line, 42-counterweight, 43-ground wire, S1-dust collecting chamber, S2-purified gas chamber.
Claims (8)
1. A dust collector is provided, which is composed of,
Is provided with a metal filter comprising metal fibers,
The internal area of the main body is divided into a dust collecting chamber and a purifying gas chamber by a partition plate,
The metal filter is mounted to the separator,
The dust collector is characterized in that,
The metal filter is provided with a regeneration mechanism which regenerates the metal filter in a state where the metal filter is attached to the separator.
2. A dust collector as set forth in claim 1, wherein,
The regeneration mechanism is provided with a heating mechanism which heats the metal filter to a temperature at which the metal fibers contained in the metal filter thermally expand to expand the gaps between the metal fibers.
3. A dust collector as set forth in claim 2, wherein,
The heating means is constituted by heating medium supply means for supplying heating medium into the metal filter.
4. A dust collector as set forth in claim 3, wherein,
The heating medium is high-temperature high-pressure steam, and the heating medium supply mechanism is provided with a nozzle capable of moving up and down for spraying the high-temperature high-pressure steam in the metal filter.
5. A dust collector as set forth in claim 4, wherein,
The metal filter is provided with a drying mechanism which sprays pulse air or drying air to dry the metal filter heated by the high-temperature high-pressure steam.
6. A dust collector as set forth in claim 3, wherein,
The heating medium is high-temperature air, and the dust collector is provided with a heat storage device for heating the air by utilizing heat stored in the heat storage device.
7. A dust collector as set forth in claim 2, wherein,
The heating mechanism is composed of a power supply device for energizing a conductive metal holder incorporated in the metal filter to heat the holder.
8. A method for regenerating a metal filter, which is the method for regenerating a metal filter of a dust collector according to any one of claims 1 to 7, characterized in that,
In a state where the metal filter is attached to the separator, the metal filter is heated to a temperature at which the metal fibers contained in the metal filter thermally expand to expand the gaps between the metal fibers.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-199283 | 2021-12-08 | ||
| JP2021199283 | 2021-12-08 | ||
| PCT/JP2022/034783 WO2023105881A1 (en) | 2021-12-08 | 2022-09-16 | Dust collector and regeneration method for metal filter thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118234555A true CN118234555A (en) | 2024-06-21 |
Family
ID=86730123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280075743.8A Pending CN118234555A (en) | 2021-12-08 | 2022-09-16 | Dust collector and method for regenerating metal filter thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2023105881A1 (en) |
| KR (1) | KR20240118754A (en) |
| CN (1) | CN118234555A (en) |
| WO (1) | WO2023105881A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0781585B9 (en) * | 1995-12-29 | 2003-09-03 | Glatt Gmbh | Apparatus for dedusting a gas |
| JP4447822B2 (en) * | 2002-05-20 | 2010-04-07 | ホソカワミクロン株式会社 | How to clean the filter |
| JP2004041941A (en) * | 2002-07-12 | 2004-02-12 | Mitsui Eng & Shipbuild Co Ltd | Filter member |
-
2022
- 2022-09-16 WO PCT/JP2022/034783 patent/WO2023105881A1/en active Application Filing
- 2022-09-16 CN CN202280075743.8A patent/CN118234555A/en active Pending
- 2022-09-16 JP JP2023566097A patent/JPWO2023105881A1/ja active Pending
- 2022-09-16 KR KR1020247015113A patent/KR20240118754A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240118754A (en) | 2024-08-05 |
| JPWO2023105881A1 (en) | 2023-06-15 |
| WO2023105881A1 (en) | 2023-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7947110B2 (en) | Methods for operating a filtration system | |
| AU2014205286A1 (en) | Cleanable filter | |
| JP5216692B2 (en) | Dust collector | |
| JP4329657B2 (en) | Gas cleaning device | |
| TWI813149B (en) | Concentrated dedusting filter dust collector capable of removing nanoparticle-grade fine dust and method thereof | |
| CN118234555A (en) | Dust collector and method for regenerating metal filter thereof | |
| KR20150139246A (en) | The filter system for high-efficiency of reuse | |
| KR100460666B1 (en) | Method and apparatus for remove dust in filtering machine | |
| KR20160082796A (en) | Dust collection and heat exchanger | |
| WO1998034713A1 (en) | Reverse pulse cleaning enhancement for cartridge filter air filtration system | |
| CN216170733U (en) | Dust removal filter bag cleaning device and kiln dust removal system | |
| JP2011041934A (en) | Bag filter and system for removing gas using the same | |
| KR200442816Y1 (en) | dust collector | |
| JP2014213304A (en) | Dust removal and gas removal dust collecting equipment | |
| KR200278984Y1 (en) | Automatic regeneration type air filter device for air cleaner | |
| CN217449443U (en) | Pulse dust removal filter equipment is used in metal powdered ore production | |
| KR100545265B1 (en) | Dust filtration collector | |
| CN112295317A (en) | Dry type cleaning device | |
| JP2008068152A (en) | Circulation type filter-regenerating mechanism, filter unit equipped with the circulation type filter-regenerating mechanism, air-cleaning device, and circulation type filter-regenerating method | |
| JP2526597B2 (en) | Ceramic Filter | |
| CN221535984U (en) | Cloth bag dust remover with powder spraying device | |
| CN220257489U (en) | Hydrogen recovery device | |
| KR100845957B1 (en) | A dust collector | |
| CN213101218U (en) | Dry-type dust collecting equipment that polishes | |
| JP2000314687A (en) | Sampling probe and probe-washing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |