JP2014180609A - Dust collecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collecting apparatus configured to use a single opening/closing valve for two injector pipes so as to usefully utilize the performance (capacity) of the opening/closing valve and cover a large number of filters with the single opening/closing valve.SOLUTION: A diaphragm valve 14 and two adjacent injector valves 11 disposed side by side are coupled to each other by a Y-shaped coupling pipe 18. The Y-shaped coupling pipe 18 includes: a straight pipe part 18a coupled to the diaphragm valve 14; and inclined pipe parts 18b that are symmetrically branched from the straight pipe part 18a and are coupled to an opening end 11w of the injector pipe 11 at an inclination angle θ of 5-15° with respect to an axis A of the injector pipe 11.

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 an exhaust chamber side to a 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 an air supply chamber and an exhaust chamber by the partition wall, and dust contained in the filtration target gas flowing in the housing from the air supply chamber side to the exhaust 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).
And in this dust collector, it was discharged through the compressed air supply means, the header pipe for 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. There is provided an injection mechanism for injecting compressed air from the exhaust chamber side to 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 above 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 line. It is installed.
When the filter openings of the filter mechanism are arranged in a matrix, a plurality of injector pipes are arranged in parallel in the exhaust 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, the system in which one on-off valve is arranged in one injector pipe is required for removing dust collected by one row of filters arranged in a row on each injector pipe. As a structure for supplying compressed air uniformly, it can be said that this structure is extremely rational with little loss, but for example, when the number of filters in a line is small or the length of the filter is small. If it is short, the performance (capacity) of the on-off valve becomes excessive capacity in relation to the amount of compressed air required to remove dust collected in a row of filters arranged in a row, resulting in high costs. There was a problem of becoming.

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

  In view of the problems of the dust collector in which one on-off valve is provided on the conventional one injector pipe, the present invention shares one on-off valve with two injector pipes. An object of the present invention is to provide a dust collector that can effectively use the performance (capacity) of an on-off valve and can cover a large number of filters with one on-off valve.

  In order to achieve the above object, a dust collector of the present invention includes a housing that is partitioned into a supply chamber and an exhaust chamber by a partition wall, and the partition wall that is provided on the partition wall. A filter mechanism for collecting dust contained in the gas to be filtered flowing from the exhaust chamber to the exhaust chamber side, compressed air supply means, a header pipe for storing compressed air from the compressed air supply means, an on-off valve, an injector pipe, and the A filter mechanism that jets compressed air discharged through an injection hole provided in an injector pipe in a pulse shape from the exhaust chamber side to the filter mechanism, and removes dust collected by the filter mechanism. However, each of the plurality of cylindrical filters is supported on the partition wall in a state where the plurality of cylindrical filters are arranged in a matrix shape with the filter openings at the base ends facing the exhaust chamber. mechanism The injector pipe corresponds to the filter openings in a state where the injection holes provided in one injector pipe face each of the plurality of filter openings arranged in a row and in a matrix. In the dust collector in which a plurality of pipes are arranged in parallel in the exhaust chamber, one on-off valve and two adjacent injector pipes arranged in parallel are branched symmetrically from the on-off valve side. And it connects by the connection pipe | tube provided with the inclination pipe | tube part connected with the inclination angle of 5 degrees-15 degrees with respect to the axis line of an injector pipe, It is characterized by the above-mentioned.

According to the dust collecting apparatus of the present invention, one on-off valve and two adjacent injector pipes arranged in parallel are branched symmetrically from the on-off valve side, and 5 with respect to the axis of the injector pipe. By connecting with a connecting pipe having an inclined pipe part connected at an inclination angle of 15 ° to 15 °, loss resistance in the connecting pipe is small, and pressure loss of supplied compressed air can be reduced. Compressed air can be evenly supplied to two injector pipes, which makes it possible to share one on-off valve with two injector pipes, effectively improving the performance (capacity) of the on-off valve By using this, a large number of filters can be covered with a single on-off valve, and the dust collected by the filters can be surely removed.
In addition, the connecting pipe is connected to the inclined pipe portion at an inclination angle of 5 ° to 15 ° with respect to the axis of the injector pipe, thereby suppressing its length and increasing the size of the dust collector. Can be prevented.

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. It is a figure which shows the simulation result of the velocity distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 2 degrees and 3 degrees. It is a figure which shows the simulation result of the velocity distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 5 degrees and 6 degrees. It is a figure which shows the simulation result of the velocity distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 10 degrees and 11 degrees. It is a figure which shows the simulation result of the velocity distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 15 degrees and 16 degrees. It is a figure which shows the simulation result of the velocity distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 20 degrees and 21 degrees. It is a figure which shows the simulation result of the pressure distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 2 degrees and 3 degrees. It is a figure which shows the simulation result of the pressure distribution of the compressed air in a connection pipe and an injector pipe at the time of setting inclination angle (theta) of the inclination pipe part of a connection pipe to 5 degrees and 6 degrees. It is a figure which shows the simulation result of the pressure distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 10 degrees and 11 degrees. It is a figure which shows the simulation result of the pressure distribution of the compressed air in a connection pipe and an injector pipe at the time of setting inclination angle (theta) of the inclination pipe part of a connection pipe to 15 degrees and 16 degrees. It is a figure which shows the simulation result of the pressure distribution of the compressed air in a connecting pipe and an injector pipe at the time of setting inclination angle (theta) of the inclined pipe part of a connecting pipe to 20 degrees and 21 degrees.

  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.
The dust collector includes a housing 1 that is partitioned into an air supply chamber 2 and an exhaust chamber 3 by a partition wall 4, and is provided in the partition wall 4 so that the interior of the housing 1 can be seen from the air supply chamber 2 side. Filter mechanism F that collects dust contained in the dust-containing air G (an example of gas to be filtered) that flows to the exhaust chamber 3 side, an air compressor 6 (an example of compressed air supply means), and compression from the air compressor 6 Filter mechanism for compressed air H discharged from the exhaust 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 cylindrical filters 5, and the plurality of cylindrical filters 5 are arranged in a matrix shape so that the filter openings 5 w at the base ends thereof face the exhaust chamber 3. Are supported by the partition wall 4.
That is, as shown in FIG. 2, the filter mechanism F is configured so that a plurality of cylindrical filters 5 are arranged in a straight line, and the filter line Fr is orthogonal to the arrangement direction of the plurality of cylindrical filters 5 in the filter line Fr. Are provided with a plurality of columns.

Further, the injection mechanism J is arranged 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, and the matrix A plurality of filters are arranged in parallel in the exhaust 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 detector (not shown) that detects a pressure difference between the inside and the outside of the cylindrical filter 5 and a control that controls the operation of the dust collector such as the operation of the injection mechanism J. A part 21 and the like are 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, purified by a supply chamber 2 to which dust-containing air G is supplied at the lower portion, and a cylindrical filter 5 provided at the upper portion of the partition wall 4. An exhaust chamber 3 through which air C flows is formed.
The casing 1 is formed so that the outer shape of the location where the cylindrical filter 5 in the air supply chamber 2 is arranged and the location where the exhaust chamber 3 is formed is substantially rectangular in top view, and the cylindrical filter 5 in the air supply chamber 2 is arranged. The outer shape of the lower side of the portion to be formed is formed in a funnel shape.

And the dust-containing air introduction path 7 which introduces the dust-containing air G from an incinerator, a steelmaking furnace, etc. (not shown) in the air supply chamber 2 in the upper end location formed in the funnel shape of the housing | casing 1 is provided. A purified air discharge path 8 for discharging the purified air C purified by the cylindrical filter 5 from the exhaust chamber 3 is connected to the upper portion connected and 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 path 8 so that the purified air C in the exhaust chamber 3 can be sucked into the external space.
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 at the discharge port 9, so that the tubular filter 5 is regenerated (tubular shape). Dust and the like in the air supply chamber 2 generated when dust collected by the filter 5 is removed) are configured to be discharged.
Accordingly, the dust-containing air G generated in the incinerator or the steelmaking furnace is introduced into the air supply chamber 2 through the dust-containing air introduction path 7 by the suction force of a suction device (not shown) and passes through the cylindrical filter 5. As a result, dust is collected and becomes purified air C, which is discharged from the exhaust chamber 3 through the purified air discharge path 8 to the external space connected to the downstream side of the dust collector.

The cylindrical filter 5 has 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) ( The bag filter is configured such that a bag-like (bottomed cylindrical) bug (not shown) configured to allow the passage of the dust-containing air G is covered outside (not shown).
The bug is composed of a filter cloth that can collect dust in the dust-containing air G satisfactorily. 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.
In addition, the cylindrical filter 5 can also be comprised from what provided the bottom part comprised by non-breathable materials other than a filter cloth etc. in the bottomless cylindrical bug (not shown), for example.

Each tubular 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 cylindrical filters 5 are arranged in a line at equal intervals in a linear filter arrangement direction (left and right direction in FIGS. 1 and 2) to form a filter array Fr, and 196 cylindrical filters 5 are arranged at equal intervals in a row, for example, 14 rows of filter rows Fr in a direction orthogonal to the filter arrangement direction (a direction orthogonal to the plane of FIG. 1, the vertical direction in FIG. 2). Is provided.
Note that the number of cylindrical filters 5 constituting the filter row Fr, the number of rows of the filter row Fr, the shape of the bug, and the like can be appropriately changed 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. The fourteen filter rows Fr are arranged in the exhaust chamber 3 so as to face the fourteen filter openings 5w arranged in a 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 cylindrical filter 5.
Each injection hole 12 is provided in the injector pipe 11 so that the center of each injection hole 12 is located at the approximate center of each filter opening 5w when viewed in the direction along the axis of each cylindrical filter 5. Yes.
And since the spreading | diffusion of the compressed air H injected from the injection hole 12 is suppressed by the ring-shaped standing part of the opening edge part of the injection hole 12, the filter opening part 5w of each cylindrical filter 5 from each injection hole 12 When the compressed air H is injected to the outside, leakage of the compressed air H to the outside is sufficiently suppressed.

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

For this reason, one diaphragm valve 14 and two adjacent injector pipes 11 arranged in parallel are branched from the straight pipe portion 18a connected to the diaphragm valve 14 and the straight pipe portion 18a symmetrically. 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. It connects with the Y-shaped connecting pipe 18 provided with the inclined pipe | tube part 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.

The results of simulation by changing the inclination angle θ of the inclined pipe portion 18b of the connecting pipe 18 will be described below.
3-1 to 3-5, the inclination angle θ of the inclined pipe portion 18b of the connecting pipe 18 is 2 ° and 3 °, 5 ° and 6 °, 10 ° and 11 °, 15 ° and 16 °, and 20 °. The simulation results of the velocity distribution of the compressed air in the connecting pipe 18 and the injector pipe 11 when setting with a variation of 21 ° and 21 ° are shown in FIGS. The connecting pipe 18 when the inclination angle θ of the pipe part 18b is set with variations of 2 ° and 3 °, 5 ° and 6 °, 10 ° and 11 °, 15 ° and 16 °, 20 ° and 21 °. And the simulation result of the pressure distribution of the compressed air in the injector pipe 11 is shown, respectively.
Here, the reason for setting with variation is to make it possible to understand the influence of installation errors and the like.
When the inclination angle θ of the inclined pipe portion 18b of the connecting pipe 18 is 5 ° to 15 ° (16 °), the loss resistance in the connecting pipe 18 is reduced as compared with the cases of 20 ° and 21 °. It was found that the pressure loss of the compressed air H can be reduced.
In addition, when the inclination angle θ of the inclined pipe portion 18b of the connecting pipe 18 is 5 ° to 15 ° (16 °), two injector pipes are compared with the cases of 2 ° and 3 ° or 20 ° and 21 °. It was found that the compressed air H can be uniformly supplied to the No. 11.
Further, when the inclination angle θ of the inclined pipe portion 18b of the connecting pipe 18 is 5 ° to 15 ° (16 °), the length is suppressed as compared with the cases of 2 ° and 3 °, and the dust collector is An increase in size can be prevented.

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 interrupting valve 17 at a predetermined regeneration timing at which regeneration of the cylindrical filter 5 needs to be performed, and the compression in the header pipe 13 detected by the stored pressure detector 15 is performed. When the pressure of the air H 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 injected in pulses from the 14 injection holes 12 provided in the injector pipe 11 through the two 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) cylindrical filters 5 can be covered, and the dust collected by the cylindrical 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.

  As mentioned above, although the dust collector of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, The structure is suitably changed in the range which does not deviate from the meaning. Is something that can be done.

  The dust collector of the present invention can effectively use the performance (capacity) of the on-off valve by sharing one on-off valve with two injector pipes, and can cover a large number of filters with one on-off valve. Therefore, it can be suitably used for various dust collector applications.

DESCRIPTION OF SYMBOLS 1 Case 2 Air supply chamber 3 Exhaust chamber 4 Partition wall 5 Tubular 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 Connection pipe 18a Straight pipe part 18b Inclined pipe part A Axis of injector pipe C Purified air F Filter mechanism Fr Filter array G Dust-containing air (gas to be filtered)
H Compressed air J Injection mechanism

Claims (1)

  Dust contained in a filtering target gas that is divided into an air supply chamber and an exhaust chamber by a partition wall, and that is provided in the partition wall and flows from the supply chamber side to the exhaust chamber side in the housing A filter mechanism for collecting the compressed air, a compressed air supply means, a header pipe for storing compressed air from the compressed air supply means, an on-off valve, an injector pipe, and a compression discharged through an injection hole provided in the injector pipe A jet mechanism for jetting air from the exhaust chamber side to the filter mechanism in a pulsed manner, and removing dust collected by the filter mechanism, and the filter mechanism includes a plurality of cylindrical filters. A plurality of cylindrical filters are supported on the partition wall in a state in which the filter openings at the respective base ends face the exhaust chamber and are arranged in a matrix, and the injector pipe of the injection mechanism is a single injector. A plurality of nozzles are provided in the exhaust chamber so that the injection holes provided in the pipe face each of the plurality of filter openings arranged in a row, and corresponding to the filter openings arranged in a matrix. In a dust collector arranged in parallel, one open / close valve and two adjacent injector pipes arranged in parallel are branched symmetrically from the open / close valve side, and are aligned with respect to the axis of the injector pipe. The dust collector is connected by a connecting pipe having an inclined pipe portion connected at an inclination angle of 5 ° to 15 °.