JP2002002955A - Device and method for recovering collected dust - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that there is no device for recovering a collected dust capable of suppressing an increase in treatment cost, simple and inexpensive to install and adaptable for not only off-line back washing tub also on-line back washing. SOLUTION: This device for recovering the collected dust comprise a dust collector 21g for separating coke dust D contained in a dust contained gas and accumulating it on an accumulation space 30g, a pneumatic body 22 having a transportation space 22a for pneumatically transporting the coke dust D accumulated in the accumulation space 30g, and a communication room 23 having a communication space 35g, communicating both with the accumulation space 30a and the transportation space 22a, wherein a shut-off valve 36g and a shut-off vale 37g are provided in the communication room 23 for partitioning the communication space 35g into three spaces in the direction of the movement of dust.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dust collection device and a dust collection method. More specifically, the present invention, for example, collects dust collected, and reuses the collected dust as coke powder used in a manufacturing process of a sinter which is a raw material to be charged to a blast furnace. The present invention relates to a dust collection device and a dust collection method capable of collecting dust.

[0002]

2. Description of the Related Art Sinter, which is a blast furnace feedstock, generally contains 3 to 5% of fine ore ("%" means "% by mass" unless otherwise specified). After mixing the coke powder, adjusting the water content to 5 to 10%, charging the coke powder into a sintering machine and heating it to a semi-molten state at 1200 to 1300 ° C, the fine ore is recrystallized or melted. Manufactured by combining and briquetting. For this reason, in the sinter production process, a large number of conveyors for transporting fine ore serving as a raw material, coke powder or coal for sintering (reducing) the fine ore are arranged. When transporting by these conveyors, although the conveyor is covered with a cover for scattering prevention, in particular, since dust from coke and coal frequently occurs, to prevent deterioration of the workplace environment due to dust scattering. A dust collector is installed near this conveyor. As the dust collector, a dry dust collector is generally used for reasons such as low cost and ease of maintenance.

[0003] In particular, dust generated from a conveyer for transporting coke or coal (hereinafter referred to as "coke dust") can be reused as a reducing agent at the time of sintering in the production of sintered ore due to its properties. For this reason, the coke dust collected by the dry dust collector has been reused by the following means (i) or (ii).

FIG. 5 shows the means (i) or (ii)
It is explanatory drawing which shows typically the situation of the reuse of the coke dust 3 by means. 5, the dust-containing gas G ₁ sent plurality of each filter cloth chambers 1a constituting the dry dust collector 1 from outside, (several thousand during) a plurality of inside each filter cloth chambers 1a hanging Coke dust 3 with lowered filter cloth 2
And it is separated into a clean gas G _2. Clean gas G ₂ is returned to the gas discharge system (not shown) via the egress duct 4. A backwash gas nozzle 5 is provided in the filter cloth chamber 1a of the dry dust collector 1 in order to prevent a reduction in dust collection performance due to clogging caused by dust adhering to each filter cloth 2.
The coke dust 3 adhering to each filter cloth 2 is separated from each filter cloth chamber 1 by the pressure of the backwash gas ejected downward from the backwash gas nozzle 5 during regular backwash.
and a dust transfer device such as a conveyor or a chain conveyor provided with a cover 7a via a dust discharge device 6 having an on-off valve 6a between the stacking chamber 1b and the stacking chamber 1b. 7 and transported. In the following description, a case where the dust transport device 7 is a conveyor will be taken as an example.

In the means (i), the coke dust 3 conveyed by the conveyer 7 is collected in an appropriate storage tank 8 having an appropriate capacity, and is periodically loaded on a transport means 9 such as a truck or a dump truck. It is transported to a predetermined yard 10 and temporarily stacked, and waits until it is reused in a predetermined process (particularly a sintering process or the like). In the means (ii), the collected coke dust 3 is added to the water, or the coke dust 3 is put into a large amount of water contained in the water mixing tank 11 and dust such as a slurry pit, and the slurry transport pump is used. 12 to a water treatment facility 13 such as a thickener,
The coke dust 3 is settled in the water treatment facility 13 and then separated into dust and water by the dewatering device 14 to form a cake, which is then transported to the yard 10 for standby.

However, in the means (i), since the transportation cost by the transportation means 9 is expensive, the transportation cost is extremely high for transporting the coke dust 3 in large quantities and for a long period of time. Further, the coke dust 3 is easily scattered during transportation by the transportation means 9. If the coke dust 3 during transportation is subjected to a hydration treatment in order to prevent this, the dust scatter and dirt near the hydration device become remarkable. Further, it is not easy to secure the yard 10 and the coke dust 3 is easily scattered even during the temporary stacking in the yard 10, and it is necessary to perform a scattering prevention process. In the means (ii), the existing water treatment equipment 13
If there is not enough capacity, the water treatment equipment 13 needs to be newly added, which requires a considerably high equipment cost. Further, since the coke dust 3 floats in the water treatment facility 13 because of its low bulk specific gravity, it is necessary to add an appropriate chemical 14 in order to precipitate it. For this reason,
This drug cost and the equipment cost of a newly installed drug injection device (not shown) increase. Further, if the existing dewatering device 14 has insufficient processing capacity, a new dewatering device 14 needs to be installed in order to dewater the coke dust 3 settled in the water treatment facility 13 and make it into a cake. There is a considerable cost of equipment.

Thus, the means (i) and (ii)
In any of the means, a large number of treatments must be performed before the coke dust 3 is reused, and appropriate equipment for performing this treatment is also required. Therefore, these means greatly increase the cost of reusing the coke dust 3.

On the other hand, an invention has been proposed in which dust collected by a dry dust collector is pneumatically transported by using a pneumatic piping, although not intended for coke dust.
For example, Japanese Unexamined Patent Publication No. Hei 5-115733 discloses a reverse type in which while the supply of blast furnace exhaust gas (B gas) to a dry dust collector is stopped, the dust attached to the filter cloth of the dust collector and collected is dropped. There is disclosed an invention in which dust is guided to a pneumatic piping by performing washing, and the dust is pneumatically transported to a dust hopper connected to the pneumatic piping by using a plurality of intricately combined pressure detection instruments.

[0009]

The backwashing of the dry dust collector 1 is roughly classified into two types: an off-line backwash and an on-line backwash.

FIG. 6 is an explanatory diagram schematically showing an off-line type backwash. As shown in the figure, a plurality of dry dust collectors 1 to which the off-line type backwash is applied (3 in the illustrated range).
Chamber) and the filter cloth chamber 1a-1~1a-3 are isolated from each other, and each filter cloth chambers 1a-1~1a-3, entry side duct for supplying dust containing gas G _1, respectively 15 1-15-3
If, exit duct 4-1 for exhausting the clean gas G ₂ after dust removal
To 4-3. In addition, each filter cloth chamber 1a-1
To 1a-3, on-off valves 16-1 to 16-3 for opening and closing communication with the outlet ducts 4-1 to 4-3, and an inlet duct 15
An on-off valve (not shown) for opening and closing communication with -1 to 15-3 is provided, and an on-off valve 16-1 to 16-3 for opening and closing communication with the outlet ducts 4-1 to 4-3. And an on-off valve (not shown) that opens and closes communication with the inlet-side ducts 15-1 to 15-3. Furthermore, each filter cloth chamber 1a
-1 to 1a-3 include an on-off valve 1 for opening and closing communication with a duct for guiding backwash gas ejected from the backwash gas nozzle 5.
7-1 to 17-3 are provided.

At the time of back washing, the outlet ducts 4-1 to 4-1 to 4 in a certain filter cloth chamber (the filter cloth chamber 1a-3 in the illustrated example) are provided.
On-off valves 16-1 to 16-3 for opening and closing communication with -3,
An on-off valve (not shown) for opening and closing the communication with the inlet-side ducts 15-1 to 15-3 is closed together, and the filter cloth chamber 1a is closed.
-3 only the supply of the dust containing gas G ₁ is dust collection is stopped is stopped. Then, the opening and closing valve 17-3 is opened, the backwash gas G ₃ is supplied to flow in a flow direction opposite to the direction of the dust containing gas G ₁ for each filter cloth 2 of the filter cloth chamber 1a-3 . Thus, as shown in FIG. 6, each filter cloth 2, the inflated state during dust collection, the filter cloth 2 by the time of backwashing changes deflated state by the pressure of the gas G ₃ backwash Shake to perform backwash. Thus, the off-line type backwash is performed by temporarily suspending dust collection in the filter cloth chamber 1a-3 to be backwashed and swinging each filter cloth 2.

On the other hand, in the dry dust collector to which the online backwash is applied, each filter cloth chamber is provided with an on-off valve for opening and closing communication with the outlet duct and an on-off valve for opening and closing communication with the inlet duct. However, there is no on-off valve for opening and closing the communication with the duct for introducing the backwash gas, and each filter cloth is swung while collecting dust.

Therefore, the invention disclosed in Japanese Patent Application Laid-Open No. HEI 5-115733 is applicable to a dry dust collector in which an off-line type backwash is performed, but is applicable to a dry dust collector in which an online type backwash is performed. There was a problem that it could not be applied. Further, in order to carry out the present invention, it is necessary to use a large number of measuring instruments and arithmetic units in combination, which makes the equipment complicated and increases the equipment cost.

As described above, if the invention disclosed in Japanese Patent Application Laid-Open No. HEI 5-115733 is to be used for collecting and reusing coke dust, the object of application is narrow,
There are problems such as an increase in processing costs and complicated and expensive facilities, and it has been difficult in practice to realize such problems.

[0015] It is an object of the present invention to suppress an increase in processing cost, to use simple and inexpensive equipment, and to apply dust collection dust applicable not only to offline-type backwashing but also to online-type backwashing. A collection device and a dust collection method are provided.

[0016]

According to the present invention, there is provided a dust collector for separating dust contained in a dust-containing gas and depositing the dust in a lower deposition space; An air carrier having a transport space for transporting;
A communication chamber having a communication space communicating with both the stacking space and the transport space; and a first opening / closing mechanism provided in the communication room to partition the communication space into three spaces in a direction in which dust moves. And a second opening / closing mechanism.

It is preferable that the dust collecting apparatus according to the present invention further includes a control device for causing the first opening and closing mechanism and the second opening and closing mechanism to perform opening and closing operations opposite to each other.

Further, in the dust collecting dust collecting apparatus according to the present invention, the pneumatic body is connected to a storage tank having a storage space which communicates with the pneumatic transportation space and stores dust to be transported by air flow. It is desirable to provide a device for extracting fixed amount of dust to be stored and an exhaust device for discharging gas inside the storage space.

Further, in the dust collecting dust collecting apparatus according to the present invention, a plurality of combinations of a dust collector and a communication chamber are provided in the direction of the air current transport of the dust by the air feeding body, and the control device is provided from the dust collector to the air feeding body. While the dust is being supplied, it is desirable to stop the supply of the dust from another dust collector located upstream of the dust collector in the airflow transport direction to the air carrier.

In the dust collecting apparatus according to the present invention, it is preferable that the dust collector is arranged in a coke manufacturing step or a conveying step, and the storage tank is arranged in a sintered ore manufacturing step. .

According to another aspect of the present invention, the present invention is directed to a method of disposing dust accumulated in a deposition space below a dust collector through a communication space communicating with the deposition space below the dust collector and communicating with the communication space. When supplying air to a pneumatic element having a transport space, the dust is dropped from the deposition space to the communication space without allowing the deposition space and the communication space to communicate with each other, and the communication space and the transport A dust-collecting dust collecting apparatus characterized in that dust is dropped from a communication space to a transport space without communicating the space and the communication space and the accumulation space.

Further, in the dust collection method according to the present invention, it is preferable that the dust is pneumatically transported by the air blower and the dust is stored in a storage tank having a storage space communicating with the air feed space.

Further, in the dust collecting dust collecting method according to the present invention, a plurality of combinations of a dust collector and a communication chamber are provided in the direction of the air current transport of the dust by the air blower, and the dust is supplied from one dust collector to the air blower. During this time, it is desirable to stop the supply of dust from another dust collector located upstream of the dust collector in the direction of airflow transport to the air carrier.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a dust collecting apparatus and a dust collecting method according to an embodiment of the present invention.

FIG. 1 is an explanatory diagram schematically showing the overall configuration of a dust collection device 20 according to this embodiment. As shown in FIG. 1, the dust collection device 20 of the present embodiment includes a dust collector 21, a pneumatic body 22, a communication chamber 23, and a storage tank 24.
And the control device 41, these components of the dust collecting dust collecting device 20 will be sequentially described. In addition,
In the following description, an example is given in which the dust collector 21 is arranged in a coke manufacturing process or a transport process, and the storage tank 24 is arranged in a sintered ore manufacturing process.

[Dust Collector 21] FIG. 2 is an explanatory view showing a portion A in FIG. 1 in an enlarged manner. As shown in FIGS. 1 and 2, in the present embodiment, the dust collector 21 is configured by combining seven dust collectors 21 a to 21 g.

[0027] The filter cloth chamber of each precipitator 21a to 21g, the input side duct 25 for supplying the dust containing gas G ₁ collected from coke production process or conveying step, after dust removal and clean gas G ₂ An outlet duct 26 for exhausting air is provided. A plurality (thousands) of filter cloths 27 are suspended and arranged inside the filter cloth chambers of the dust collectors 21a to 21g.

A dust-containing gas G ₁ collected from dust generated from a belt conveyor (not shown) provided in a coke manufacturing process or a transport process is blown by a blower 28 into an inlet duct 25, a communication chamber 23 described later, and Dust collector 21a
Is supplied in order of ～21G, by coke dust D of dust containing gas G ₁ is attached to the filter cloth 27, is dust removal by the filter cloth 27. The clean gas G ₂ after dust removal is supplied to the blower 28.
, And is exhausted from the exhaust tube 31 to the outside of the system via the outlet duct 26.

As shown in FIG. 2, each of the dust collectors 21a to 21
A backwash gas nozzle 29 is disposed on the upper portion of the filter cloth 27 of g, and the backwash gas is jetted downward from the backwash gas nozzle 29 to the filter cloth 27. Thereby, each filter cloth 2
7 is backwashed off-line or on-line, and coke dust D is dropped from each filter cloth 27. As a result, the coke dust D accumulates in the accumulation spaces 30a to 30g below the dust collectors 21a to 21g. The deposited coke dust D is dropped and supplied to the air feeding body 22 via a communication chamber 23 described later.

The remaining configuration of the dust collector 21 of the present embodiment is the same as that of a known dust collector of this type, so that further description of the dust collector 21 will be omitted. The dust collector 21 of the present embodiment is configured as described above.

[Pneumatic Element 22] The dust collecting and collecting apparatus 20 of the present embodiment has the pneumatic element 22. The pneumatic body 22 is a transport body that is capable of transporting the coke dust D that falls after being deposited in the communication chamber 23 to be described later through the transport space 22a formed therein, and has an appropriate diameter in the present embodiment. It was configured using piping. The pneumatic element 22 is connected to a storage tank 24 having a storage space 24a which can communicate with the transport space 22a and can store the conveyed coke dust D.

In this embodiment, two storage tanks 24 are provided, and the switching valve 33a provided on the
By causing the opening and closing operations to be performed in the opposite directions to each other, it is possible to switch the storage location of the coke dust D transported by the pneumatic body 22 to the storage tank 24 or the storage tank 24 ′. For example, the switching valve 33a
Is closed and the switching valve 33b is opened, the coke dust D becomes a colored flow as shown in FIG.
When the switching valve 33a is opened and the switching valve 33b is closed,
Coke dust D is a non-colored stream. In addition,
As will be described later, since the storage tank 24 on the left side in FIG. 1 suspends the storage of coke dust D, in this case,
The pneumatic transport of coke dust D is interrupted.

In this embodiment, the switching valves 33a, 3a
3b, the switching valves 33a and 33b are opened together if the capacity of the pneumatic blower 32 is sufficient, and coke dust D is simultaneously discharged in parallel with the two storage tanks 22. You may make it supply. FIG. 3 is an explanatory diagram showing a state in which the switching valves 33a and 33b are both opened.

The switching valves 33a and 33b are unnecessary when only one storage tank 24 is provided, but when two or three or more storage tanks 24 are provided, the switching valves 33a and 33b may be provided on a part of the air supply body 22 directly connected to each storage tank. It is desirable to provide.

In this embodiment, a suitable actuator (not shown) is provided for the switching valves 33a and 33b, and the switching valves 33a and 33b are opened and closed by an input signal input from the control device 41. By doing so. Thereby, the switching valves 33a, 33b
Can be quickly and remotely controlled by a control signal from the control device 41.

A pneumatic blower 32 is connected to the pneumatic element 22 and pressurizes the carrier gas to the storage tank 24. For this reason, the coke dust D supplied to the air carrier 22 is pressure-fed in the transport space 22 a without leaking out of the system of the air carrier 22, and is reliably conveyed to the storage tank 24.

A measuring device 42 capable of detecting the amount of dust stored in the storage tanks 24 and 24 ′ is attached, and an output signal from the measuring device 42 is input to a control device 41. Accordingly, the control device 41 outputs a control signal to the switching valves 33a and 33b, and outputs the control signals to the switching valves 33a and 33b.
3b is automatically opened and closed. In this way, the control device 41 can automatically select the optimum storage tank from the storage tanks 24 and 24 '.

The control device 41 includes storage tanks 24, 2
A signal for detecting the driving state of the conveyor 34 arranged in the manufacturing process of the sintered ore s on which the 4 'is installed is input.
As a result, the control device 41 transmits the stopped conveyor 3
The switching tanks 33a, 3b are provided in the storage tank 24 for supplying the coke dust D to the tank 4 so that the coke dust D is not transported by air.
3b is controlled.

Since the transport space 22a of the pneumatic body 22 is completely shielded from the outside, moisture is strictly controlled. For this reason, without scattering dust by any means such as watering, which was one of the factors that reduced the productivity of the sintered ore s,
Coke dust D can be reliably transported to storage tank 24 without generating dust.

The other structure of the air supply body 22 of the present embodiment is the same as that of a known air supply body of this type, so that further description of the air supply body 22 will be omitted. The pneumatic body 22 of the present embodiment is configured as described above.

[Communication Room 23] The dust collecting dust collecting apparatus 20 of this embodiment has a communication room 23. This communication room 23
Are disposed between the dust collectors 21 a to 21 g and the air carrier 22, seven in total. The communication room 23 includes a dust collection base 21a.
A communication space 35a communicating with any of the accommodation spaces 30a to 30g of the air carrier 22 and the transport space 22a of the air carrier 22.
Has 35 g.

As described above, in this embodiment, the dust collector 21
a to 27 g and the communication chamber 23 are provided in a state in which seven sets are arranged side by side in the air current transport direction of the dust by the air carrier 22.

In the present embodiment, the seven communication rooms 23 respectively have opening / closing valves 36a to 36a-3, which are first opening / closing mechanisms.
6g and on-off valves 37a to 37g as second opening / closing mechanisms are provided, respectively. These on-off valves 36a-36
g and the on-off valves 37a-37g, each communication space 35
a to 35 g are three spaces in the direction in which the dust moves, that is, a first space communicating with the dust collectors 21 a to 27 g, a second space communicating with the first space, and the second space. And a third space communicating with the transport space.

Although not shown, on-off valves 36a-36g
An appropriate actuator (for example, a solenoid valve) is attached to the opening / closing valve shafts of the opening / closing valves 37a to 37g.
By outputting a control signal from the control device 41 to this actuator, the opening / closing operations of the opening / closing valves 36a to 36g and the opening / closing valves 37a to 37g are electrically controlled.

The opening / closing valve 36 serving as the first opening / closing mechanism is used.
a to 36 g, and on-off valves 37 a to 3 which are second on-off mechanisms
7g is controlled by the control device 41 to perform opening and closing operations opposite to each other.

For example, in FIG. 1, the on-off valve 36a is closed and the on-off valve 37a is open. At this time, the coke dust D stored in the second space is discharged to the transport space 22a of the air carrier 22 via the on-off valve 37a, but the coke dust D stored in the storage spaces 30a to 30g of the dust collector 22. D stays on the first on-off valve 36a and is not discharged to the second space.

On the other hand, as shown in FIG. 1, the on-off valve 36b is open and the on-off valve 37b is closed. At this time, the coke dust D stored in the second space stays on the on-off valve 37b and is not discharged to the transport space 22a of the air feeding body 22, but the storage spaces 30a to 30 of the dust collector 22.
The coke dust D accommodated in g falls on the on-off valve 37b and is discharged to the second space. At this time, since the second on-off valve 37b is closed, even when the air blower 32 is operating, the air pressure gas does not flow back into the filter cloth chamber of the dust collector 21b. Therefore, the coke dust D stored in the second space remains as it is. That is, the on-off valves 36a to 36g are accommodated in the accommodation spaces 30a to 30g.
The coke dust D stored in the
The valve is a valve for discharging to the space defined by
37 g is coke dust D stored in the second space.
Is discharged to the transport space 22a of the pneumatic body 22.

As described above, the on-off valves 36a to 36g and the on-off valves 37a to 37g are opened and closed in the opposite directions, that is, alternately, so that the transport space 2
The coke dust D can be dropped from the dust collectors 21a to 21g to the pneumatic body 22 while preventing the pneumatic gas fed inside the 2a from flowing back to the dust collectors 21a to 21g.

Further, in FIG. 1, dust collectors 21c-2c
Since the open / close valves 36c to 36g and the open / close valves 37c to 37g provided in the communication chamber 23 provided in 1g, respectively, are closed, the coke dust D is stored in the dust collectors 21c to 21g.

Further, the control device 41 controls each of the on-off valves 36a to 36a.
The opening / closing operation of each of the 36g and the opening / closing valves 37a to 37g is controlled by performing a so-called timer operation. As a result, while dust is being supplied from one of the dust collectors 21a to 21g to the air feeding body 22, the air is transferred to the air feeding body from another dust collector located upstream of the dust collector in the airflow transport direction. Supply of dust is stopped. Therefore, when the coke dust D is discharged from the upstream communication room (for example, the communication room 35b) while the coke dust D is being discharged from the downstream communication room (for example, the communication room 35a),
Blockage of the air carrier 22 due to the large amount of coke dust D being charged from the communication chamber 35b is completely prevented.

The other configuration of the communication room 23 of the present embodiment is the same as that of a known air blower of this type, so that further description of the communication room 23 will be omitted. The communication room 23 of the present embodiment is configured as described above.

[Storage Tank 24] FIG. 4 shows the storage tank 2 of this embodiment.
It is explanatory drawing which expands and shows 4. The dust collection device 20 of this embodiment has a storage tank 24. In the present embodiment, two storage tanks 24 are provided, and both of them are
It is connected to the air carrier 22. Thereby, the air carrier 22
The air supply space 22a communicates with the storage space 24a of the storage tank 24 that stores dust to be transported by air flow.

At the bottom of the storage tank 24, a fixed amount cut-out device (for example, a rotary valve or the like) 39 for coke dust D stored in the storage tank 24 is provided. Is controlled.

When the controller 41 controls the fixed quantity cutting device 39, coke dust D is always accumulated in the storage tank 24. This prevents the gas in the storage tank 24 from being blown out by the pneumatic pressure from the exhaust device 24 described later.

On the other hand, on the ceiling of the storage tank 24, an exhaust device 40 for exhausting the gas in the storage space 24a of the storage tank 24 is provided. For example, the coke dust D continues to be pneumatically fed into the storage tank 24 through the pipe in which the switching valve 33b is open. However, if the pneumatic gas is not escaped, the storage tank 24 will burst or the pneumatic gas will stagnate. Resulting in. Therefore, in the present embodiment, the exhaust device 40 is provided in the storage tank 24. In addition,
In the illustrated example, the gas exhausted from the exhaust device 40 is released.
5 may be supplied.

The exhaust state of the exhaust device 40 is also controlled by the control device 41. Thereby, when loading the coke dust D from the storage tank 24 to the transport conveyor 38,
It is possible to reduce dust pressure and prevent dust scattering. Although not shown, by providing a small filter cloth in the exhaust device 40, the gas exhausted from the exhaust device 40 can be further purified.

As the quantitative cutout device 39 and the exhaust device 40, known devices were used. This allows
The pneumatic gas containing the coke dust D stored in the storage tank 24 is prevented from being ejected from the fixed quantity extracting device 24 to the outside of the system.

In this embodiment, each of the two storage tanks 24 is provided with a transport conveyor 3 constituting a transport line for raw materials (including iron ore, coke, and auxiliary materials) in the sintering process.
8 above.

Here, the coke dust D is used as a reducing agent in the sintering step of the sintered ore, and it is desirable that the amount of the transported coke dust D be quantitatively and continuously supplied. It is desirable to detect and report it. In addition, even when it is impossible to supply coke dust D due to a stoppage of the sintering process or the like, the coke manufacturing process or the transport process is performed regardless of the operation status of the sintering process. It is desirable to ensure the pneumatic and accommodating location of the coke dust D collected by the dust collector 21 when the equipment in the process is stopped.

Therefore, in this embodiment, two storage tanks 24 are provided, and a signal indicating the driving status of the transport conveyor 38 is input to the control device 41 to detect the driving status of the transport conveyor 38, and based on the detected value, And the switching valves 33a, 3
3b is controlled.

As a result, even when the conveyor 38, which is a facility in the sintering process, stops, it is possible to ensure a sufficient amount of pneumatic feed and storage of the coke dust D collected by the dust collector 21.

In the present embodiment, the fixed-quantity cutting device 39
By controlling the rotation of the electric motor by, for example, inverter control or the like, the cut-out amount of coke dust D can be made constant or variable, whereby the transport amount of coke dust D can be arbitrarily controlled. In the event of an interruption, monitoring the load current of the electric motor can be detected early.

By using the storage tank 24, the coke dust D can be mounted on the conveyor 38 without increasing the water content and without scattering the dust. [Control device 41] Dust collection device 20 of the present embodiment
Has a control device 41. The control device 41 transmits and receives signals to and from various devices as shown by broken lines in FIG. 1 and controls the operations of these various devices.

In particular, as described above, the control device 41
The on-off valves 36a to 36g, which are the first on-off mechanisms, and the on-off valves 37a to 37g, which are the second on-off mechanisms, perform opening and closing operations opposite to each other.
While the coke dust D is being supplied from 21 g to the air blower 22, the supply of dust to the air blower 22 from another dust collector located upstream of the dust collector in the airflow transport direction is stopped.

The dust collecting device 20 of the present embodiment is
The configuration is as described above. Next, the operation of the dust collecting dust collecting apparatus 20 will be described. The control device 41 closes the on-off valves 36a to 36g and the on-off valve 37g to thereby form the deposition space 3 inside the dust collectors 21a to 21g.
Coke dust D dropped from the filter cloth 27 is deposited on 0a to 30g.

Next, the control device 41 opens the opening / closing valve 36a of the dust collector 21a so as to make the accumulation space 30a and the communication space 35a communicate with each other and to open the communication space 35a.
Without communicating with the transport space 22a,
The coke dust D deposited on the stacking space 30a
Is deposited in the communication space 35a communicating with.

Next, the control device 41 closes the on-off valve 36a and opens the on-off valve 37a, so that the communication space 35a and the transport space 22a are communicated, and the communication space 35a and the deposition space 30a are not communicated.
The coke dust D stored in the communication space 35a is dropped into the transport space 22a. At this time, in the deposition section 30a,
The coke dust D dropped from the filter cloth 27 starts to accumulate.

Then, the control device 41 controls the communication space 35a.
After all of the coke dust D is discharged, the on-off valve 37
Close a. The controller 41 pneumatically transports the coke dust D discharged into the communication space 35a to the storage tank 24 by appropriately controlling the pneumatic blower 32 and the switching valves 33a and 33b.

Next, the control device 41 controls the dust collectors 21a to 21a-2.
Similar control is sequentially performed for 1 g. As described above, while the coke dust D is being supplied from a certain dust collector to the air blower 22, the control device 41 controls the air blower from another dust collector located upstream of the dust collector in the airflow transport direction. 2
2 is controlled to stop the supply of dust.

As described above, the dust collecting apparatus 20 of the present embodiment allows the dust collectors 21a to 21g to store
4, coke dust D is transported by air. According to this embodiment, the following effects can be obtained.

(I) The transportation and processing costs for transporting coke dust D by truck or the like can be eliminated. (Ii) It is possible to suppress the processing cost and the remodeling cost of existing equipment when performing slurry processing on coke dust D.

(Iii) There is no need to use complicated measuring devices and arithmetic units. (Iv) When the coke dust falls to the air blower 22, the reverse flow of the coke dust to the dust collector can be eliminated, so that the present invention can be applied not only to the offline dust collector but also to the online dust collector.

(V) Almost no modification is necessary for existing equipment, and the capacity and capacity of each of the newly installed dust collector 21 and air supply 22 equipment and the storage tank 24 are compared with the specifications of the existing equipment. By simply adapting the above, a highly efficient dust collection and dust collection device that has not been achieved in the past can be obtained.

(Vi) Since the coke dust D can be reused as coke at low cost to manufacture the sintered ore, the manufacturing cost of the sintered ore can be significantly reduced.

[0075]

EXAMPLES Further, the present invention will be described in detail with reference to examples. Coke dust D was supplied onto the conveyor 38 by using the dust collection device 20 shown in FIG. In this embodiment, the apparatus has the following specifications.

(1) Air volume of the dust collector 21: 7000 m ³ /
(Number of filter cloth chambers: 8) (2) Ventilation pressure of dust collecting blower 28: -550 mmAq (3) Backwash method of dust collector 21: pulse jet type online cleaning method (pulse pressure 4 kgf / cm ² ) (4) Pneumatic Blower 32: Roots type blower (5) Blow volume of pneumatic blower 32: 34 m ³ / min (6) Pressure of pneumatic blower 32: 4200 mmAq (7) Diameter of pneumatic element 22: 150A (8) Pneumatic distance: About 40 m As a result, 15 (g / m ³ ) ×
Coke dust D in an amount of 7000 (m ³ / min) = 6300) kg / hour could be supplied stably.

[0077]

As described in detail above, according to the present invention, an increase in processing cost can be suppressed, the equipment is simple and inexpensive, and the present invention can be applied not only to offline type backwashing but also to online type backwashing. It is possible to provide a possible dust collection device and a dust collection method.

The significance of the present invention having such effects is extremely remarkable.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing an entire configuration of a dust collection dust collection device according to an embodiment.

FIG. 2 is an explanatory diagram showing an enlarged part A in FIG. 1;

FIG. 3 is an explanatory diagram showing a state in which both switching valves are opened.

FIG. 4 is an explanatory diagram showing a storage tank of the embodiment in an enlarged manner.

FIG. 5 is an explanatory view schematically showing a situation of coke dust reuse by conventional means.

FIG. 6 is an explanatory diagram schematically showing off-line backwashing.

[Explanation of symbols]

 Reference Signs List 20 Dust collection device 22a Transport space 22 Pneumatic element 23 Communication room 30g Stacking space 35g Communication space 36g, 37g Open / close valve

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mikio Kitajima 3 Oaza Hikari, Kashima City, Ibaraki Prefecture Sumitomo Metal Industries, Ltd. Kashima Works (72) Inventor Yoshio Hashiguchi 3 Oaza Hikari, Kashima City, Ibaraki Prefecture Sumitomo Metal Industries, Ltd. Inside Kashima Works (72) Inventor Masaki Yamanaka 3 Oaza Hikari, Kashima City, Ibaraki Prefecture Sumitomo Metal Industries Kashima Works F-term (reference) 3F047 AA01 CA02 CA06 CC28 4D058 JA04 JB24 JB25 MA15 MA18 MA53 RA03 RA12 SA20

Claims (8)

[Claims] A dust collector for separating dust contained in the dust-containing gas and depositing the dust in a lower deposition space; and a dust collector disposed below the dust collector and transporting the dust accumulated in the deposition space by air flow. And a communication chamber having a communication space communicating with any of the accumulation space and the transport space, further provided in the communication room, and three spaces in a direction in which the dust moves in the communication space. First opening / closing mechanism and second opening / closing mechanism
A dust collection device, comprising: an opening / closing mechanism. 2. The dust collection dust collecting apparatus according to claim 1, further comprising a control device for causing the first opening and closing mechanism and the second opening and closing mechanism to perform opening and closing operations opposite to each other. apparatus. 3. The pneumatic body is connected to a storage tank which communicates with the pneumatic space and has a storage space for storing dust to be pneumatically transported. The dust collecting dust collecting apparatus according to claim 1 or 2, further comprising: a device; and an exhaust device configured to discharge gas in the housing space. 4. A plurality of combinations of the dust collector and the communication chamber are provided in a direction in which air is transported by the air carrier in the direction of dust flow, and the control device is configured to supply the dust to the air carrier from a certain dust collector. Wherein the supply of dust to the air blower from another dust collector located upstream of the dust collector in the airflow transport direction is stopped. Dust collection device. 5. The dust collector according to claim 3, wherein the dust collector is arranged in a coke manufacturing process or a conveying process, and the storage tank is arranged in a sinter ore manufacturing process. Collection device. 6. A pneumatic pump having a transport space disposed below the dust collector and communicating with the communication space, via a communication space communicating with the accumulation space, for dust accumulated in the lower accumulation space of the dust collector. When supplying to the body, the communication space and the communication space are communicated with each other, and the communication space and the transport space are not communicated with each other.After dropping the dust from the accumulation space to the communication space, the communication space and A dust collection method for collecting dust, wherein the dust is dropped from the communication space to the transport space without communicating the communication space and the communication space and the accumulation space. 7. The dust collection according to claim 6, wherein the dust is pneumatically transported by the pneumatic body, and the dust is stored in a storage tank having a storage space communicating with the pneumatic space. Dust collection method. 8. A plurality of combinations of the dust collector and the communication chamber in a direction in which the dust is transported by the air carrier in the air current transport direction, and while the dust is being supplied from the dust collector to the air carrier, the dust collector is provided. The dust collection method according to claim 6 or 7, wherein the supply of dust to the air blower from another dust collector located on the upstream side in the airflow transport direction is stopped. .