JP4106147B2 - Bug filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag filter that is a dust collecting device that captures and removes dust in a gas.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3, a large bag filter for processing a large amount of gas introduces dust-containing gas from the vicinity of the hopper portion 2 below the dust collection chamber 1 and raises the inside of the dust collection chamber 1. A cylindrical filter cloth 4 is passed through to the clean room 5. Further, dust adhering to the surface of the filter cloth 4 is discharged to the outside as appropriate while being temporarily stored by being wiped off to the hopper portion 2 by high-pressure air jetted from the air jet pipe 6.
[0003]
[Problems to be solved by the invention]
However, in the conventional bag filter, since the gas is introduced from the vicinity of the hopper portion 2 in the lower portion of the dust collection chamber 1, an upward air flow is generated in the hopper portion 2 and is accumulated in the lower portion of the hopper portion 2. The dust that is being removed and the dust that is being removed will be raised again. In addition, since the gas is introduced and raised from the lower side of the filter cloth, the amount of dust adhering on the upper and lower parts of the filter cloth will be different, and the gas will concentrate on the part where the amount of dust adhering is low. It has the disadvantage that the balance becomes worse and the life of the filter cloth is shortened.
[0004]
In view of the above points, an object of the present invention is to provide a bug filter capable of efficiently capturing and removing dust.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is divided into a dust collection chamber and a clean chamber by a partition, and a gas inlet is formed in the dust chamber and a gas outlet is formed in the clean chamber, while the upper portion of the dust chamber is In the bag filter in which a large number of filter cloths are suspended from the partition wall and a hopper part for temporarily storing captured dust is formed in the lower part, the gas inlet is formed on the upper side of the dust collecting chamber. A pair of guide plates having a large number of vent holes in the dust collection chamber facing the gas inlet are arranged at a predetermined distance, and a number of filter cloths are provided on both sides of the pair of guide plates. It is characterized by that.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
According to the bag filter of the present invention, the gas is introduced from the upper side of the dust collection chamber and is advanced while guiding the inside of the dust collection chamber by the pair of guide plates. Gas is led out from the lower end side of the guide plate to the filter cloth side.
[0007]
At this time, the gas led out from the vent of the guide plate to the filter cloth side immediately rises from the flow in the substantially horizontal direction, and the gas flowing out from the lower end side of the guide plate to the filter cloth side also immediately rises. As it passes through the cloth, a strong gas flow is generated only in the upper part of the dust collection chamber, and the upward air flow is reduced in the lower part of the dust collection chamber, and the dust accumulated in the hopper and the behavior of dust during dedusting Raising can be suppressed as much as possible.
[0008]
In addition, since the gas is blown out from the vent holes of the guide plate over the entire length of the filter cloth, the gas uniformly passes through the entire filter cloth, and this and the effect of suppressing the rising of the dust cause the dust to flow. Capturing and dust removal can be performed efficiently, and the life of the filter cloth is extended.
[0009]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
The inside of the bag filter 10 is partitioned into a dust collection chamber 12 and a clean chamber 13 by a partition wall 11. A hopper section 14 having a substantially funnel cross section is formed in the lower part of the dust collection chamber 12, and a screw feeder 15 is disposed below the hopper section 14 to carry out dust that has fallen and accumulated.
[0011]
A gas introduction port 16 is formed in the upper side of the dust collection chamber 12, and a pair of guide plates 18 having a large number of ventilation holes 17 in the dust collection chamber 12 facing the gas introduction port 16 is collected. A predetermined distance is provided along the longitudinal direction of the chamber 12.
[0012]
A large number of tubular filter cloths 19 are detachably suspended from both side portions of the pair of guide plates 18 with the partition wall 11 being passed therethrough. The length of the guide plate 18 in the vertical direction is approximately the same as or slightly longer than that of the filter cloth 19, and the upper end is preferably in contact with the partition wall 11.
[0013]
The cleaning chamber 13 is formed with a gas outlet 20 through which the gas passed through the filter cloth 19 is discharged, and high-pressure air is pulsed into the cleaning chamber 13 from the upper opening of each filter cloth 19. An air injection pipe 22 having a pulse injection valve 21 for injecting the air is provided. In addition, a venturi tube 23 that draws in ambient air with the blast air is attached to the opening of each filter cloth 19.
[0014]
Thus, when gas is introduced from the gas inlet 16 of the bag filter 1, the gas is guided by the guide plate 18, and the filter cloth is passed through the vent hole 17 formed in the guide plate 18 while moving forward or from the lower end side of the guide plate 18. 19 side is derived. At this time, the gas led out from the vent hole 17 of the guide plate 18 to the filter cloth 19 side immediately rises from the flow in the substantially horizontal direction as shown in FIG. The gas flowing out to the 19 side also immediately rises and passes through the filter cloth 19. For this reason, a strong gas flow is generated only in the upper part of the dust collecting chamber 12, and the upward airflow is reduced in the lower part of the dust collecting chamber 12, so that the dust accumulated in the hopper part 14 and the dust during the dust removal rise as much as possible. It will be suppressed.
[0015]
When the gas passes through the filter cloth 19, dust in the gas is captured by the filter cloth 17 and adheres to the surface of the filter cloth, and the cleaned gas flows into the clean chamber 13 and passes through the gas outlet port 20. It flows downstream of the device. Dust adhering to the surface of the filter cloth 17 is dedusted by the high-pressure air ejected from the air ejection pipe 22 every predetermined time and falls to the hopper unit 11, but a rising air flow is generated in the hopper unit 14. There is little soaring.
[0016]
In this way, dust-containing gas is introduced from the gas inlet 16 on the upper side of the dust collecting chamber 12 and guided by the guide plate 18 having the vent 17 formed from the lower side of the vent hole 17 or the guide plate 18. Since it is led out to the filter cloth 19 side, a strong gas flow is generated only in the upper part of the dust collecting chamber 12, the upward air flow is reduced in the lower part of the dust collecting chamber 12, and dust and dedusting in the hopper part 14 are reduced. The rise of dust inside is suppressed as much as possible, and gas is blown out from the vent holes 17 of the guide plate 18 over the entire length of the filter cloth 19, so that the gas uniformly passes through the entire filter cloth, Dust can be captured and removed efficiently, and the life of the filter cloth can be extended.
[0017]
【The invention's effect】
As described above, in the bag filter according to the present invention, the gas introduction port is formed on the upper side portion of the dust collection chamber, and a large number of ventilation holes are formed in the dust collection chamber so as to face the gas introduction port. A pair of guide plates are arranged at a predetermined distance and a large number of filter cloths are arranged on both sides of the pair of guide plates, so that a strong gas flow is generated only at the upper part of the dust collection chamber, and the lower part of the dust collection chamber. In the hopper of this section, there is little ascending air flow and the amount of dust rising can be reduced, and the gas can be uniformly passed over the entire filter cloth, so that dust can be captured and removed efficiently. The life of the cloth can be extended.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an embodiment of a bag filter according to the present invention.
2 is a sectional view taken along line AA in FIG. .
FIG. 3 is a view corresponding to FIG. 2 of a conventional bag filter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Partition 12 ... Dust collection chamber 13 ... Clean room 14 ... Hopper part 16 ... Gas inlet 17 ... Vent 18 ... Guide plate 19 ... Filter cloth 20 ... Gas outlet

Claims (1)

The partition is divided into a dust collection chamber and a clean chamber. A gas inlet is formed in the dust chamber and a gas outlet is formed in the clean chamber, while a number of filter cloths are suspended from the partition above the dust chamber. In the bag filter in which a hopper part for temporarily storing captured dust is formed in the lower part of the bag filter, the gas inlet is formed on the upper side of the dust collecting chamber, and the dust inlet faces the gas inlet. A bag filter characterized in that a pair of guide plates having a large number of ventilation holes in a room are disposed at a predetermined distance, and a plurality of filter cloths are disposed on both sides of the pair of guide plates.

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