JP6090797B2 - Dust collector - Google Patents

Description

  The present invention relates to a dust collector, and in particular, dust collected by a filter mechanism by jetting compressed air discharged through an injection hole provided in an injector pipe in a pulse shape from the clean chamber side to the filter mechanism. The present invention relates to a dust collector equipped with an injection mechanism that removes water.

Conventionally, the interior of the housing is partitioned into a dust collection chamber and a clean chamber by the partition wall, and dust contained in the filtration target gas flowing in the housing from the dust collection chamber side to the clean chamber side is collected on the partition wall. 2. Description of the Related Art A dust collector that is provided with a filter mechanism is widely used (see, for example, Patent Documents 1 to 3).
In this dust collector, the compressed air discharged through the compressed air supply means, the header pipe storing the compressed air from the compressed air supply means, the on-off valve, the injector pipe, and the injection hole provided in the injector pipe An air injection mechanism is provided for injecting air from the clean chamber side into the filter mechanism in a pulsed manner so as to remove dust collected by the filter mechanism.

JP 7-16413 A JP-A-9-85031 JP 2007-175622 A

By the way, in the conventional dust collector, the injector pipe of the injection mechanism is arranged so that the injection holes provided in one injector pipe face each of the plurality of filter openings arranged in a row. It is installed.
In the case where the filter openings of the filter mechanism are arranged in a matrix, a plurality of injector pipes are arranged in parallel in the clean chamber corresponding to the filter openings in a matrix. The on-off valves are arranged so as to correspond to the respective injector pipes, that is, one on-off valve is arranged on one injector pipe.

  As described above, in the system in which one on-off valve is arranged in one injector pipe, the compressed air necessary for removing the dust collected by the filters arranged in a row is injected into each injector pipe. It can be said that it is a very rational structure with little loss as a structure for supplying uniformly. For example, when the number of filters arranged in a row is small or the length of the filter is short, it can be opened and closed. There has been a problem that the performance (capacity) of the valve becomes excessive due to the amount of compressed air required to remove dust collected by the filters arranged in a row, resulting in high costs.

  In order to cope with this problem, it is conceivable to use an on-off valve having a performance (capacity) suitable for the amount of compressed air required to remove dust collected by filters arranged in a row. Therefore, it is necessary to prepare on-off valves having different performance (capacity), and there is a problem that the cost is increased in this respect.

  In view of the problems of the dust collector of the type in which one conventional on-off valve is arranged on the above-described conventional injector pipe, the applicant of the present application has previously made one on-off valve into two injectors. A dust collector was proposed in which the performance (capacity) of the on-off valve is effectively used by sharing the pipe, and a large number of filters can be covered with one on-off valve (Japanese Patent Application No. 2013-56006).

By the way, in the design of the dust collector, the number of filters for dust removal by one on-off valve is set to be the same for each dust collector, and the compressed air injection pressure, the injection interval, and the injection time ( Hereinafter, the set value of “compressed air injection control value” is generally gradually increased according to the clogging condition of the filter (intrusion of dust into the fiber layer due to aging). .
However, as described above, when one on-off valve is shared by two injector pipes, the performance (capacity) of the on-off valve can be effectively used, and a large number of filters can be covered with one on-off valve. On the other hand, for example, when the number of injector pipes provided in the dust collector is an odd number, two injector pipes are connected to one on-off valve, and one injector pipe is connected to one on-off valve. Since the form is mixed, the number of filters from which dust is removed by one on-off valve is inevitably different.
And, when the set value of the injection control value of compressed air is matched with the configuration side in which two injector pipes are connected to one on-off valve, the configuration in which one injector pipe is connected to one on-off valve The compressed air injection control value on the side becomes excessive, the filter is damaged, the service life is shortened, and conversely the compressed air injection control value is connected to the configuration side in which one injector pipe is connected to one on-off valve. When the set values are matched, there is a problem that the injection control value of the compressed air on the side where the two injector pipes are connected to one on-off valve becomes too small, and the dust is not sufficiently discharged. I understood.

  The problem is that the number of injection holes provided in each injector pipe is different (the number of filters corresponding to one injector pipe is different in each injector pipe), or the filter corresponding to each injector pipe. It has been found that this also occurs when the lengths of the are different.

  In the present invention, one on-off valve is shared by two injector pipes, the number of injection holes provided in each injector pipe is different, or the length of the filter corresponding to each injector pipe. In the case of using a plurality of open / close valves with the same dust removal performance in consideration of the problems when using a plurality of open / close valves with the same dust discharge performance in a dust collector with different However, it prevents the compressed air injection control value from becoming excessive and the filter from being damaged, the service life from being shortened, and conversely the compressed air injection control value from becoming excessively low, resulting in insufficient dust removal. An object of the present invention is to provide a dust collector that can perform the above operation.

  In order to achieve the above object, a dust collector of the present invention is provided with a housing that is partitioned into a dust collection chamber and a clean chamber by a partition wall, and provided in the partition wall, and the dust collection device is disposed inside the housing. A filter mechanism for collecting dust contained in the gas to be filtered flowing from the chamber side to the clean chamber side, and compressed air discharged from the compressed air supply means through a plurality of on-off valves provided in parallel. A jetting mechanism for jetting the filter mechanism from the clean chamber side to the filter mechanism to remove dust collected by the filter mechanism, and the filter mechanism includes a plurality of bottomed cylindrical filters. The plurality of filters are supported by the partition wall in a state in which the filter openings at the base ends thereof face the clean chamber and are arranged in a matrix, and the injection mechanism is open at the base ends. And the tip is closed The injector pipes are arranged in the clean chamber in a state facing each of the plurality of filter openings arranged in a row, and the injector pipe is connected to each of the plurality of filter openings. In the dust collecting apparatus provided with a plurality of injection holes for injecting the compressed air, the injector pipe is supplied to the proximal end side from the position where the injection holes of at least one of the plurality of injector pipes are provided. A restricting means for restricting the flow rate of the compressed air is provided.

Specifically, each of the plurality of on-off valves is connected to a combination of either a plurality of injector pipes or a smaller number of injector pipes, and a compressed air is connected to the small number of injector pipes. A restricting means for restricting the flow rate of the gas can be provided.

  Further, the number of injection holes provided in each of the plurality of injector pipes is different, and a restriction means for restricting the flow rate of the compressed air can be provided in the injector pipe having a small number of injection holes provided. .

The plurality of the filters corresponding to each injector pipe will be a different length, the injector pipes corresponding to the shorter length filter, it is possible to arrange the regulating means for regulating the flow rate of the compressed air .

  Further, the regulating means for regulating the flow rate of the compressed air can be configured by an annular reduced diameter portion that provides resistance to the flow of the compressed air.

  According to the dust collector of the present invention, the restriction means for restricting the flow rate of the compressed air supplied to the injector pipe from the location where the injection hole of at least one of the plurality of injector pipes is provided to the base end side Even if multiple on-off valves with the same dust removal performance are used, the compressed air injection control value becomes excessive, which may damage the filter, shorten the service life, or conversely. Further, it is possible to prevent the compressed air injection control value from becoming excessively small and insufficiently dusting off.

Specifically, (1) Each of a plurality of on-off valves is connected to a combination of either a plurality of injector pipes or a smaller number of injector pipes. (2) The number of injection holes provided in each of the plurality of injector pipes is different, and the number of injection holes provided is reduced. or disposed regulating means for regulating the flow rate of the air, (3) a and the length of the filter corresponding to each of the plurality of injectors pipes are different, the injector pipes corresponding to the shorter length filter, compressed air By using a plurality of on-off valves that have the same dust removal performance by disposing a regulating means for regulating the flow rate of Even if the compressed air injection control value is too high, the filter will be damaged, the service life will be shortened, and conversely, the compressed air injection control value will be too low and the dust will not be removed sufficiently. can do.

  Further, the restricting means for restricting the flow rate of the compressed air is constituted by an annular reduced diameter portion that provides resistance to the flow of the compressed air, so that the restricting means can be constituted by a member having a simple structure. .

It is a front view which shows one Example of the dust collector of this invention. It is a top view of the dust collector.

  Hereinafter, embodiments of the dust collector of the present invention will be described with reference to the drawings.

1 to 2 show an embodiment of the dust collector of the present invention.
This dust collector includes a housing 1 whose interior is partitioned into a dust collection chamber 2 and a clean chamber 3 by a partition wall 4, and is provided on the partition wall 4 so that the interior of the housing 1 can be seen from the dust collection chamber 2 side. A filter mechanism F that collects dust contained in dust-containing air G (an example of a gas to be filtered) that flows to the clean chamber 3 side, an air compressor 6 (an example of compressed air supply means), and a compression from the air compressor 6 Filter mechanism for compressed air H discharged from the clean chamber 3 side through a header pipe 13 for storing air H, a diaphragm valve 14 (an example of an on-off valve), an injector pipe 11 and an injection hole 12 provided in the injector pipe 11 And an injection mechanism J for discharging dust collected in the filter mechanism F in a pulsed manner to F.

In this case, the filter mechanism F is configured to include a plurality of bottomed cylindrical filters 5, and the plurality of filters 5 are arranged in a matrix so that the filter openings 5 w at the base ends face the clean chamber 3. It is supported by the partition wall 4 in a state of being arranged in a line.
That is, as shown in FIG. 2, the filter mechanism F includes a plurality of columns of filter rows Fr in which a plurality of filters 5 are arranged in a straight line in a direction orthogonal to the arrangement direction of the plurality of filters 5 in the filter row Fr. Configured.

In addition, the injection mechanism J is configured so that the injector pipe 11 is in a state in which the injection holes 12 provided in one injector pipe 11 face each of the plurality of filter openings 5w arranged in a row. A plurality of filters are arranged in parallel in the clean chamber 3 corresponding to the filter openings 5w arranged in a line.
The injection mechanism J is provided with the header pipe 13 for storing the compressed air H from the air compressor 6 and the diaphragm valve 14, and is stored in the header pipe 13 by switching the diaphragm valve 14 to the valve open state. The compressed air H is injected into the injector pipe 11.
The injector pipe 11 has a proximal end side as an open end 11w and a distal end side as a closed end 11s.
The header pipe 13 is provided with a storage pressure detector 15 that detects the pressure of the compressed air H in the header pipe 13.

  Further, the dust collector includes a pressure difference detection unit (not shown) that detects a pressure difference between the inside and the outside of the filter 5, a control unit 21 that controls the operation of the dust collector such as the operation of the injection mechanism J, and the like. Is provided.

Here, each part of a dust collector is demonstrated in detail.
The casing 1 is partitioned by a partition wall 4 in the vertical direction, a dust collection chamber 2 to which dust-containing air G is supplied at the lower portion, and purified air C purified by a filter 5 provided on the partition wall 4 at the upper portion. Is formed in the clean chamber 3.
The casing 1 is formed so that the outer shape of the part in which the filter 5 is disposed in the dust collection chamber 2 and the part in which the clean chamber 3 is formed is substantially rectangular in a top view, and the filter 1 in the dust collection chamber 2 is disposed. The lower outer shape is formed in a funnel shape.

A dust-containing air introduction path 7 for introducing dust-containing air G from an incinerator, a steelmaking furnace or the like (not shown) into the dust collecting chamber 2 is connected to the upper end portion formed in the funnel shape of the housing 1. A purified air discharge path 8 for discharging the purified air C purified by the filter 5 from the clean chamber 3 is connected to an upper portion formed in the rectangular shape of the housing 1. A suction device (not shown) is provided on the downstream side of the purified air discharge passage 8 so that the purified air C in the clean chamber 3 can be sucked into the external space.
In addition, a discharge port 9 is formed at the lower end of the portion formed in the funnel shape of the housing 1, and a rotary valve 10 is provided in the discharge port 9, and the filter 5 is regenerated (captured by the filter 5). It is configured to be able to discharge dust and the like in the dust collection chamber 2 generated when the collected dust is removed).
Accordingly, the dust-containing air G generated in an incinerator or a steelmaking furnace is introduced into the dust collecting chamber 2 through the dust-containing air introduction path 7 by the suction force of a suction device (not shown) and passes through the filter 5. Dust is collected and becomes purified air C, which is discharged from the clean chamber 3 through the purified air discharge path 8 to an external space connected to the downstream side of the dust collector.

The filter 5 is a support body (not shown) having a bottomed cage shape (for example, a bottomed cylindrical cage shape in which a plurality of linear rod-like bodies are attached to a plurality of ring-shaped frame bodies formed in an annular shape). ) Is formed as a bag filter covered with a bag-like (bottom cylindrical) bug (not shown) configured to allow dust-containing air G to flow through.
The bug is composed of a filter cloth that can collect dust in the dust-containing air G satisfactorily, for example, by a base cloth, a non-woven cloth, a woven cloth, etc. that are formed by a non-woven cloth that is attached on the outside with a cloth inside Composed.
The material of the filter cloth is made of synthetic fiber or glass fiber.
The lower portion of the bag is bag-shaped, the upper opening is a filter opening 5w, and the upper end of the bug is sandwiched and fixed between the support and the partition wall 4.
Note that the filter 5 can also be configured by, for example, a bottomless cylindrical bug (not shown) provided with a bottom portion made of a non-breathable material other than a filter cloth.

Each filter 5 is attached to the partition wall 4 in a suspended state with the filter opening 5w formed at the upper end.
In this embodiment, 14 filters 5 are arranged in one line at equal intervals in a linear filter arrangement direction (left and right direction in FIGS. 1 and 2) to form a filter row Fr, and a plurality of rows, For example, 15 filter rows Fd (odd rows) are arranged at equal intervals in a direction orthogonal to the filter arrangement direction (a direction orthogonal to the paper surface of FIG. 1, the vertical direction of FIG. 2), and 210 filters 5 Is provided.
Note that the number (number of columns) of the filters 5 constituting the filter row Fr, the number of the filter rows Fr, the shape of the bug, and the like can be changed as appropriate in relation to the amount of dust processing and the like.

The injector pipe 11 has an end on the opening end 11w side protruding outside from the side wall of the housing 1, and the remaining portion in a lateral orientation along the direction in which the 14 filter openings 5w are arranged. It is arranged for each of the 15 filter rows Fr in a state of being positioned in the clean chamber 3 so as to face the 14 filter openings 5w arranged in one row.
The injection holes 12 are configured by circular perforations formed in the injector pipes 11, and ring-shaped rising portions are formed in the radial direction of the injector pipes 11 by burring at the opening edges of the injection holes 12. It is provided to project outward. That is, each injector pipe 11 is provided with 14 injection holes 12 at equal intervals so as to correspond one-to-one to the filter openings 5 w of the filter 5.
Each injection hole 12 is provided in the injector pipe 11 so that the center of each injection hole 12 is positioned at the approximate center of each filter opening 5w when viewed in the direction along the axis of each filter 5.
And since the spreading | diffusion of the compressed air H injected from the injection hole 12 is suppressed by the ring-shaped rising part of the opening edge part of the injection hole 12, it compresses to the filter opening part 5w of each filter 5 from each injection hole 12. When the air H is injected, the compressed air H is sufficiently suppressed from leaking to the outside.

  By the way, in this dust collector, one header pipe | tube 13 is provided with respect to 15 injector pipes 11, and it is one diaphragm for every two adjacent injector pipes 11 arrange | positioned in parallel. A valve 14 is provided, and the remaining one injector pipe 11 is provided with one diaphragm valve 14 having the same performance.

Then, one diaphragm valve 14 and two adjacent injector pipes 11 arranged in parallel are branched symmetrically from the straight pipe portion 18a connected to the diaphragm valve 14 and the straight pipe portion 18a. The injector pipe 11 is connected to the opening end 11w at an inclination angle θ of 5 ° to 15 ° (preferably about 8 ° to 12 °, more preferably about 10 °) with respect to the axis A of the injector pipe 11. The connection is made by a Y-shaped connecting pipe 18 having an inclined pipe portion 18b.
Here, it is preferable that the diaphragm valve 14, the connecting pipe 18, and the injector pipe 11 are arranged so as to be positioned on substantially the same horizontal plane.
In addition, the connection pipe 18 can also be made into the V shape which consists only of the inclination pipe part 18b by abbreviate | omitting the straight pipe part 18a.

On the other hand, one diaphragm valve 14 and the remaining one injector pipe 11 are formed by extending the end of the injector pipe 11 on the opening end 11w side that protrudes from the side wall of the housing 1 to the outside. I try to connect.
And the annular diameter reduction which gives resistance to the flow of the compressed air supplied to the injector pipe 11 in the extended suitable location of this injector pipe 11, ie, the base end side from the location which provided the injection hole 12 of the injector pipe 11. A portion 19 (an example of a regulating means for regulating the flow rate of compressed air) is arranged.
In addition, as a restricting means for restricting the flow rate of the compressed air, in addition to the annular reduced diameter portion 19 shown in the present embodiment, any mechanism that can regulate the flow rate of the compressed air such as a valve mechanism is used. In addition, by disposing the mechanism in a detachable manner, it is possible to vary the resistance force (the restriction amount of the flow rate of the compressed air) applied to the flow of the compressed air.

Since the structure and operation of the diaphragm valve 14 are well known, they will be briefly described with illustration and detailed description omitted.
The diaphragm valve 14 includes a pressure chamber that applies a back pressure to the diaphragm and an electromagnetic valve that opens and closes an exhaust passage that exhausts the pressure chamber. When the solenoid valve is closed, the primary pressure (pressure in the header pipe 13) is guided to the pressure chamber through the communication hole, the pressure of the pressure chamber is applied to the diaphragm, and the valve body attached to the diaphragm is moved to the valve seat. The diaphragm valve 14 is closed. On the other hand, when the solenoid valve is in the open state, the pressure in the pressure chamber is reduced and lowered, the diaphragm is pushed by the primary pressure (pressure in the header pipe 13), and the valve element attached to the diaphragm is separated from the valve seat, The diaphragm valve 14 is opened. That is, the diaphragm valve 14 is switched between the open state and the closed state by the opening / closing operation of the electromagnetic valve.

The air compressor 6 and the header pipe 13 are connected by a compressed air supply path 16 so that the compressed air H discharged from the air compressor 6 is supplied to the header pipe 13.
The compressed air supply passage 16 is provided with a compressed air interrupting valve 17 for intermittently supplying the compressed air H to the header pipe 13.
Then, the control unit 21 opens the compressed air intermittent valve 17 at a predetermined regeneration timing at which the filter 5 needs to be regenerated, and the compressed air H in the header pipe 13 detected by the stored pressure detector 15 is opened. When the pressure reaches a predetermined target storage pressure, the compressed air intermittent valve 17 is closed.
That is, the compressed air H from the air compressor 6 is stored in the header pipe 13 at the target storage pressure.

Subsequently, when the control unit 21 closes the compressed air interrupting valve 17 as the pressure in the header pipe 13 detected by the storage pressure detector 15 becomes a predetermined target storage pressure, the seven diaphragms are closed. A predetermined one of the valves 14 is configured to open for a preset regeneration time. Incidentally, the set regeneration time is set to a time slightly longer than the time required for substantially the entire amount of the compressed air H stored in the header pipe 13 to be injected from the injection hole 12 of the injector pipe 11.
That is, when the diaphragm valve 14 is opened, the compressed air intermittent valve 17 is closed, so that the supply of the compressed air H from the air compressor 6 to the header pipe 13 is cut off. The high-pressure compressed air H stored in 13 is jetted in a pulse form from 14 injection holes 12 provided in the injector pipe 11 through two (or one) injector pipes 11.

According to this dust collecting apparatus, one diaphragm valve 14 and two adjacent injector pipes 11 arranged in parallel are branched symmetrically from the diaphragm valve 14 side, and the axis of the injector pipe 11 is By connecting with the connecting pipe 18 having the inclined pipe portion 18b connected to A at an inclination angle of 5 ° to 15 °, the loss resistance in the connecting pipe 18 is small, and the supplied compressed air H is supplied. The pressure loss can be reduced, and the compressed air H can be uniformly supplied to the two injector pipes 11, whereby one diaphragm valve 14 can be shared by the two injector pipes 11. It is possible to effectively use the performance (capacity) of the diaphragm valve 14 and use a single diaphragm valve 14 (in this embodiment, 14 (2 × 28) filters 5 can be covered, and the dust collected by the filters 5 can be surely removed.
Further, the connecting pipe 18 is connected to the inclined pipe portion 18b at an inclination angle θ of 5 ° to 15 ° with respect to the axis A of the injector pipe 11, thereby suppressing the length thereof, and a dust collector. Can be prevented from increasing in size.

By the way, when one diaphragm valve 14 is shared by two injector pipes in this way, the performance (capacity) of the diaphragm valve 14 is effectively utilized, and a large number of filters 5 are formed by one diaphragm valve 14. On the other hand, when the number of injector pipes 11 provided in the dust collector is an odd number as in this embodiment, a configuration in which two injector pipes 11 are connected to one diaphragm valve 14 and one diaphragm are provided. Since the configuration in which one injector pipe 11 is connected to the valve 14 coexists, the number of the filters 5 from which dust is removed by the single diaphragm valve 14 is inevitably different.
When the set value of the compressed air injection control value is matched to the configuration side where two injector pipes 11 are connected to one diaphragm valve 14, one injector is provided for one diaphragm valve 14 as it is. The compressed air injection control value on the configuration side to which the pipe 11 is connected becomes excessive, and the filter is damaged or the life is shortened. Conversely, the configuration side in which one injector pipe 11 is connected to one diaphragm valve 14 When the set value of the compressed air injection control value is adjusted to the same value, the compressed air injection control value on the configuration side in which the two injector pipes 11 are connected to one diaphragm valve 14 becomes too small. There will be a problem of insufficient payout.
In order to cope with this, in the present embodiment, the injection of the injector pipe 11 on the side where the injection control value of the compressed air becomes excessive, that is, the configuration in which one injector pipe 11 is connected to one diaphragm valve 14. By disposing an annular diameter-reducing portion 19 that provides resistance to the flow of compressed air supplied to the injector pipe 11 from the location where the hole 12 is provided to restrict the flow rate of the compressed air, Even when a plurality of diaphragm valves 14 having the same dropping performance are used and the setting value of the injection control value of the compressed air is matched with the configuration side in which two injector pipes 11 are connected to one diaphragm valve 14, 1 The injection control value of compressed air on the form side in which one injector pipe 11 is connected to each diaphragm valve 14 becomes excessive, and the filter 5 is damaged. Ri, so that it is possible to prevent the service life is reduced.

In addition to the case shown in the present embodiment, the number of injection holes 12 provided in each injector pipe 11 varies depending on factors such as the shape of the dust collection chamber 2 of the dust collector (for example, each injector pipe 11). Even when the number of filters 5 corresponding to one injector pipe 11 is different) or when the length of the filter 5 corresponding to each injector pipe 11 is different, the injection control value of compressed air is too large or too small. It will be.
Even in such a case, when the injection control value of compressed air is excessive, that is, when the number of injection holes 12 provided in each injector pipe 11 is different, the number of injection holes 12 provided is small. When the length of the filter 5 corresponding to each injector pipe 11 is different from the position where the 11 injection holes 12 are provided, the injection hole 12 of the injector pipe 11 corresponding to the filter 5 having a short length is provided. By controlling the flow rate of the compressed air by disposing an annular reduced diameter portion 19 that provides resistance to the flow of the compressed air supplied to the injector pipe 11 at the base end side from the provided location, the injection control value of the compressed air is controlled. Therefore, it is possible to prevent the compressed air injection control value on the side where is excessively large from being excessively large and the filter 5 from being damaged or from being shortened.

  As mentioned above, although the dust collector of this invention was demonstrated based on the some Example, this invention is not limited to the structure described in the said Example, The structure described in each Example is combined suitably, etc. The configuration can be changed as appropriate without departing from the spirit of the invention.

  In the dust collector of the present invention, even when dust is removed using a plurality of on-off valves having the same performance, the injection control value of compressed air becomes excessive, the filter is damaged, the life is shortened, On the contrary, since it is possible to prevent the jetting control value of the compressed air from becoming excessively small and the dust from being insufficiently discharged, it can be suitably used for various dust collector applications.

DESCRIPTION OF SYMBOLS 1 Case 2 Dust collection chamber 3 Clean room 4 Partition wall 5 Filter 5w Filter opening 6 Air compressor (compressed air supply means)
11 Injector pipe 11w Open end of injector pipe 11s Closed end of injector pipe 12 Injection hole 13 Header pipe 14 Diaphragm valve (open / close valve)
18 connecting pipe 18a straight pipe part 18b inclined pipe part 19 annular reduced diameter part (regulating means for regulating the flow rate of compressed air)
A Axis of injector pipe C Purified air F Filter mechanism Fr Filter line G Dust-containing air (gas to be filtered)
H Compressed air J Injection mechanism

Claims (4)

A housing whose interior is partitioned into a dust collection chamber and a clean chamber by a partition wall, and provided in the partition wall, into the filtration target gas that flows from the dust collection chamber side to the clean chamber side in the housing A filter mechanism that collects dust contained therein, and compressed air discharged from a compressed air supply means through a plurality of on-off valves provided in parallel, and jetted in a pulse form from the clean chamber side to the filter mechanism; An injection mechanism for removing dust collected by the filter mechanism, and the filter mechanism is configured to include a plurality of bottomed cylindrical filters, and the plurality of filters are provided at their base ends. In a state where the filter openings are arranged in a matrix in a posture facing the clean room, the injection mechanism is supported by the partition wall, and the injection mechanism includes a plurality of injector pipes whose proximal ends are open and whose distal ends are closed. Comprising A plurality of injector pipes disposed in the clean chamber in a state facing each of the plurality of filter openings arranged in a row, and a plurality of the jet pipes for injecting the compressed air into each of the plurality of filter openings; In the dust collector provided with a plurality of injection holes , each of the plurality of on-off valves is connected to a combination of either a plurality of injector pipes or a smaller number of injector pipes. A dust collecting device, characterized in that a regulating means for regulating the flow rate of the compressed air supplied to the injector pipe is disposed on the base end side from the portion where the injection hole of the injector pipe is provided. A housing whose interior is partitioned into a dust collection chamber and a clean chamber by a partition wall, and provided in the partition wall, into the filtration target gas that flows from the dust collection chamber side to the clean chamber side in the housing A filter mechanism that collects dust contained therein, and compressed air discharged from a compressed air supply means through a plurality of on-off valves provided in parallel, and jetted in a pulse form from the clean chamber side to the filter mechanism; An injection mechanism for removing dust collected by the filter mechanism, and the filter mechanism is configured to include a plurality of bottomed cylindrical filters, and the plurality of filters are provided at their base ends. In a state where the filter openings are arranged in a matrix in a posture facing the clean room, the injection mechanism is supported by the partition wall, and the injection mechanism includes a plurality of injector pipes whose proximal ends are open and whose distal ends are closed. Comprising A plurality of injector pipes disposed in the clean chamber in a state facing each of the plurality of filter openings arranged in a row, and a plurality of the jet pipes for injecting the compressed air into each of the plurality of filter openings; In the dust collector provided with a plurality of injection holes, the number of injection holes provided in each of the plurality of injector pipes is different, and the number of injection holes provided is small. A dust collecting device, characterized in that a regulating means for regulating the flow rate of the compressed air supplied to the injector pipe is disposed on the base end side. A housing whose interior is partitioned into a dust collection chamber and a clean chamber by a partition wall, and provided in the partition wall, into the filtration target gas that flows from the dust collection chamber side to the clean chamber side in the housing A filter mechanism that collects dust contained therein, and compressed air discharged from a compressed air supply means through a plurality of on-off valves provided in parallel, and jetted in a pulse form from the clean chamber side to the filter mechanism; An injection mechanism for removing dust collected by the filter mechanism, and the filter mechanism is configured to include a plurality of bottomed cylindrical filters, and the plurality of filters are provided at their base ends. In a state where the filter openings are arranged in a matrix in a posture facing the clean room, the injection mechanism is supported by the partition wall, and the injection mechanism includes a plurality of injector pipes whose proximal ends are open and whose distal ends are closed. Comprising A plurality of injector pipes disposed in the clean chamber in a state facing each of the plurality of filter openings arranged in a row, and a plurality of the jet pipes for injecting the compressed air into each of the plurality of filter openings; In the dust collector provided with a plurality of injection holes, the length of the filter corresponding to each of the plurality of injector pipes is different, and the proximal side from the position where the injection holes corresponding to the filter having a short length are provided In addition, the dust collecting apparatus is characterized in that a regulating means for regulating the flow rate of the compressed air supplied to the injector pipe is disposed. The regulating means for regulating the flow rate of compressed air is constituted by an annular reduced diameter portion to provide resistance to the flow of compressed air, characterized by comprising claim 1, 2 or 3 dust collecting apparatus according.

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