JPS6230520A - Dust removing filter for motor car tunnel - Google Patents

Abstract

PURPOSE:To enhance the amount of dust removed air to a large extent by obtaining a wide filtering area, by parallelly providing a large number of rotary drums formed of an air permeable hard net material so as to block an air passage and arranging a strip like filter material to the outer peripheries of the rotary drums in a meandering state. CONSTITUTION:Air having dust mixed therein flows through the meandering material 7 in a filter 4 toward the direction shown by an arrow. The filter material 7 is a strip like one allowed to extend along the outer peripheral surfaces of rotary drums in a meandering state. The drums 6 for carrying the filter material 7 and a receiving member 8 are formed of an air permeable net material. Dust is collected by the filter material 7 and purified air flows out through a damper 27. When the filter material 7 was contaminated, a take-up shaft 12 is rotated by a take-up motor 13 to take up the filter material 7 while a new filter material 7 is drawn out. Therefore, filtering area can be widened and a filter material having weak mechanical strength can also be used.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Industrial Application Field) This invention relates to a filter that filters dust-containing air and removes dust from the air.

(Prior art) This type of filter, in which the filter material is stretched linearly to block the ventilation path through which dust-containing air flows, has a low throughput of air that can remove dust. The problem was that there were few.

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems, and by arranging the filter media in a meandering manner, a significantly wider filtration area can be obtained, and the amount of air to be removed can be reduced. The purpose is to provide a filter that can be significantly improved.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) A filter medium is supported in a meandering manner by a plurality of rotating drums each made of a hard net material.

When the air mixed with dust passing through the ventilation path attempts to pass through the filter medium, the dust mixed therein is removed by the filter medium. In the above case, since the filter medium is supported by the outer peripheral surfaces of the plurality of rotating drums, it is extremely unlikely that the filter medium will be damaged by the air flowing through the ventilation path. When replacing the filter medium, the plurality of rotating drums are rotated to send the dirty filter medium to one side and removed from the rotating drum, and at the same time, a new filter medium is replaced by the dirty filter medium along the movement path of the dirty filter medium. It can be attached in a meandering manner to the outer peripheral surface of a plurality of rotating drums.

(Embodiments) The drawings showing the embodiments of the present application will be explained below. 1 is a floor surface, 2 is a seal plate, and a ventilation path 3 is formed between them. Note that the side surface of the air passage 3 is surrounded by a well-known side wall (not shown). 4
indicates a filter arranged so as to block the air passage 3.

In this filter 4, 5 is a machine frame, and 6, 6, . . . are rotating drums for supporting filter media, each of which is made of a hard net material, such as a wire mesh, and has a circular cross section (hexagonal or other polygonal shapes are also acceptable). It is also rotatably mounted on the machine frame 5.

The mesh of the net material constituting the rotating drum 6 is preferably selected to have a size that keeps the pressure loss of the air flowing through the ventilation path 3 small, for example, 5 ts square to 10 mm square or more. indicates a band-shaped filter medium attached to the outer peripheral surface of the plurality of rotating drums 6 in a meandering manner. The filter medium 7 used has a mesh size that corresponds to the type of dust to be removed. 8
is a receiving member attached to the machine frame 5, and is made of a hard net material.

It is preferable that the mesh of this receiving member 8 is defined in the same manner as the rotating drum.Next, 10 indicates a filter medium supply section, and 11 indicates a winding section. Since the supply section 1O and the winding section 11 have the same structure, only the winding section 11 will be described in detail, and the overlapping explanation of the supply section 10 will be omitted. 1
Reference numeral 2 denotes a winding shaft rotatably mounted on the machine frame 5, and is rotationally driven by a winding motor 13 equipped with a speed reducer. 14 is a cover, 15 is a limit switch for detecting the end of winding, and a detection piece 15a is brought into contact with the outer peripheral surface of the filter medium 7 wound around the winding shaft 12. Reference numeral 16 denotes a guide roll rotatably mounted on the machine frame 5, and an operating piece 17 is provided on a part of its outer peripheral surface. On the 1st, the limit switch is used to detect the amount of winding. When the guide roll 16 rotates and the operation piece 17 intermittently operates this switch 18, the number of times the switch is operated is counted and the winding shaft 12 is activated. Detecting the winding m- of the filter medium 7 relative to the winding. 20 indicates a playback device,
In this, 21 is a regeneration chamber, 22 is a regeneration nozzle, and is provided with an air outlet 23. 24 is a high-pressure air supply pipe, one end of which is connected to the nozzle 22 and the other end connected to a high-pressure air supply device. 25 is a duct, one end of which is connected to the regeneration chamber 21 and the other end of which is connected to a well-known dust collector (not shown) (e.g. bag filter, cyclone, etc.)
It is connected to. The reproducing device 20 configured as described above is also provided in the supply section 10 . Next, 27 is a well-known damper for adjusting the flow rate attached to the machine frame 5, and has a plurality of damper blades 28. These damper blades are driven in conjunction with a morph (not shown).

When removing dust (for example, unburned carbon, sand, etc.) from dust-containing air using the filter configured as described above, the dust-containing air flows into the ventilation passage 3 as shown by the arrow from the left in Fig. 1. be swept away. The dust-mixed air passes through a meandering filter medium 7 in the filter 4. In this case, since the rotating drum 6 and the receiving member 8 are made of a net material to allow air to pass through, the air can flow through the meandering filter medium 7 regardless of the presence of the rotating drum 6 and the receiving member 8. pass through any part of At that time, the dust contained in the air is captured by the filter medium 7, and only the air from which the dust has been removed passes through the filter medium 7. The air purified as described above flows out to the right in FIG. 1 through the damper 27. In the case of the above example, even if the air flow is too strong and the filter medium 7 rises from the right side circumferential surface of the rotating drum 6 in FIG. 1, it is stopped by the receiving member 8 and damage is prevented.

If the filter medium 7 attached to the rotating drum 6 becomes dirty due to the removal of dust as described above (this is detected, for example, by detecting the differential pressure between the upstream side and the downstream side of the air passageway from the filter 4), Perform reupholstery as follows. The take-up shaft 12 is rotated by the take-up motor 13. Then, the dirty filter medium is drawn to the shaft 12, so each rotary drum 6 rotates, and the filter medium 7 moves downward, and is sequentially wound around the shaft 12.
As a result, a new filter medium is drawn out from the supply section IO, and the new filter medium is again attached to the rotating drum 6 in a meandering manner. It is detected by the winding amount detection limit switch 18 that all of the dirty filter medium has been wound onto the winding shaft 12, and the motor 13 is stopped when the winding is finished.

In the process of winding up the dirty filter medium 7 onto the winding shaft 12 as described above, the regeneration device 20 regenerates the filter medium 7, that is, removes dust adhering to the filter medium 7 as follows. That is, air in the regeneration chamber 21 is sucked toward the dust collector through the duct 25, high-pressure air is supplied to the nozzle 22 through the supply pipe 24, and high-speed air is sent from the outlet 23 to the filter medium 7.
is sprayed towards.

The width of the air outlet 23 is, for example, 1.5 mm, and the speed of the air blown out from it is 100 m/sec or more. The dust adhering to the filter medium 7 is blown away from the filter medium 7 by such blowing of air, and the blown dust is sent to the dust collector through the duct 25 along with the air. The amount of air sucked in by the duct 25 is greater than the amount of air blown out from the nozzle 22 (for example, 2.5 times or more), and the air is blown away from the corner of the regeneration chamber 21 (the part where the filter medium 7 enters and exits). It is a good idea to prevent dust from flowing out.

When the filter medium 7 is re-covered on the rotary drum 6 by the operation of the winding section 11 as described above several times and there is no filter medium 7 remaining in the supply section 10 (for example, the length of the filter medium 7 described above is 20 30 m, and the above-mentioned re-covering can be performed about 7 times), the moving direction of the filter medium 7 is reversed so that it is sent out from the winding section 11 and is wound up on the supply section IO, and then It is sufficient to repeat the dust removal operation and the relining operation again, and once all the filter media has been wound up in the supply section 10,
The direction may be reversed again and the dust removal and re-covering operations may be performed in the same manner as described above.

Next, FIG. 4 shows an example of how the filter is used. In the figure, reference numeral 31 denotes an exhaust passage for ventilation of the automobile tunnel, one end 31a of which is connected to the main road of the automobile tunnel, and the other end 31b connected to an exhaust tower. 32 is an exhaust fan, 33
indicates a rectifier plate.

In such a configuration, air mixed with dust is sucked in from the tunnel main road by the exhaust fan 32, and the dust is removed from the air mixed with dust by passing through the filter 4. The purified air is then discharged into the atmosphere through the exhaust tower.Next, FIG. 5 shows a further different example of how the filter is used. In the figure 3
4 is a tunnel main road, 35 is a circulation duct, and 36 is a circulation fan.

In such a configuration, dust-containing air sucked in the direction of the arrow from the tunnel main road 34 passes through the filter 4 and is purified, and is further returned to the tunnel main road 34 through the circulation fan 36.

In this specification, the use of the above-mentioned filter has been explained as a dust removal filter for automobile tunnels, but its use is not necessarily limited to automobile tunnels; for example, it can be used as a filter for general air conditioning such as air conditioning equipment in buildings and factories. Of course it is possible.

(Effects of the Invention) As described above, in the present invention, when the dust-containing air flowing through the ventilation path is filtered by the filter medium 7, the filter medium 7 is attached to a plurality of rotating drums in a meandering manner. , it is possible to obtain a significantly wider filtration area than when the filter medium is stretched in a straight line, blocking the ventilation path, and has the effect of significantly improving the throughput of the air to be dusted.

Moreover, in the above case, even if a wide filtration area is obtained as described above, the filter medium 7 is not connected to the rotating drum 6.
Since the filter medium 7 is supported on the circumferential surface of the filter medium 7, even if the mechanical strength of the filter medium against the air flowing through the ventilation path is weak, the filter medium 7 can maintain its original shape and resist breakage. This has the advantage of not only being able to use relatively thick and durable filter media, but also meeting the demand for using fine-mesh and extremely thin filter media to increase the removal efficiency for fine dust.

Furthermore, in the present invention, when the filter medium 7 becomes dirty.

By rotating the rotating drum 6, dirty filter media can be sent to one side and removed, and new filter media can be added to the plurality of rotating drums 6 to replace the dirty filter media, so that the filter media can be replaced with new filter media. It also has the effect of significantly shortening the time required.

Also, by automating the playback process, it can be reused!
Since the σε material is wound up in the winder, there is no need to replace the filter media, and labor can be omitted.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal cross-sectional view;
2 is a partially cutaway left side view of FIG. 1, FIG. 3 is a vertical sectional view showing the detailed structure near the winding section, and FIGS. 4 and 5 are views showing installation examples, respectively. 6...Rotating drum, 7...Filtering material. Figure 2

Claims (1)

[Claims] A plurality of rotating drums each made of a hard net material that allows air to pass through are arranged in parallel so as to block the air passages, and the outer circumferences of the plurality of rotating drums are 1. A dust removal filter for an automobile tunnel, characterized in that a belt-shaped filter medium is attached in a meandering manner, and the filter medium is supported by the outer peripheral surface of a plurality of rotating drums.