JP2742020B2 - Dust removal device with automatic regeneration function for filter media - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover having an automatic regeneration function for filter media, such as a large-scale filter dust remover provided in a road tunnel ventilation device or the like.

[0002]

2. Description of the Related Art Conventionally, in a tunnel for an automobile having a long and heavy traffic, an exhaust tunnel is provided to forcibly exhaust the exhaust gas and other soot from an automobile running inside the tunnel, and the tunnel is compulsorily installed in the tunnel. The ventilation is done. In the middle of the exhaust tunnel, a dust remover is provided to remove dust such as soot and discharge the purified exhaust gas to the atmosphere. The dust removal device filters dust such as soot contained in exhaust gas with a filter. Filtered dust accumulates on the filter, causing clogging and losing the filtering function.Therefore, clean and regenerate the clogged filter or filter media with a filtering function as a filter. Need to be replaced.

[0003] The prior art for cleaning with the filter media attached is disclosed in, for example, Japanese Patent Application Laid-Open No. 64-58314. This prior art discloses a configuration in which a part of a filter medium is sealed, high-pressure air is blown to blow off dust adhering to the surface of the filter medium, and the blown dust is sucked and cleaned.

In the method of replacing the filter media with a new one, a dirty filter media is washed and regenerated,
Have been reused. In order to wash and reuse the filter media, there are mainly two types: a system in which the shape of the filter media is provided as a roll and a cleaning device is provided in a part of the transport path, and a system in which the filter media is divided into flat plates and manually extracted from the mounting base for cleaning. Is being done.

[0005]

In the prior art in which the filter media is cleaned with the filter media attached, dust on the surface of the filter media can be blown to some extent and sucked, but it is difficult to remove dust inside the filter media. is there. Even dust on the surface, such as dust from a road tunnel, which is mixed with oil and fat and adheres to the surface of the filter media, cannot be sufficiently cleaned to be cleaned. In a configuration in which the filter medium is formed as one large roll and a cleaning device is provided in a part of the transport path of the roll, the cleaning device must be provided near the filter, and there is a restriction on the installation location. Further, it is difficult to realize a filter medium having a large area.

[0006] It is difficult to automatically clean and regenerate the filter media to which the fats and oils adhere with the conventional dust removing device. In the end, the filter media is extracted manually and transported to the cleaning device for cleaning. It is necessary to return the used filter media to a predetermined position on the mounting table again. For such a filter medium, in a dust removing device for an exhaust in a road tunnel, it is necessary to stop the ventilation blower at midnight when traffic volume in the tunnel is small, and perform replacement work. To replace many filter media at the same time, a relatively large number of personnel must be gathered in the exhaust tunnel.
It is also difficult to secure a large number of personnel late at night, and since a dirty filter is handled in a narrow exhaust tunnel, the working environment is poor and there is a problem in worker health.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dust removing apparatus having an automatic filter media regenerating function capable of automatically cleaning and regenerating the filter media without manual operation.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a dust removing apparatus provided in a gas flow passage and having an automatic regeneration function of a filter medium for filtering dust contained in gas,
A plurality of flat filter media can be inserted and removed in the vertical or horizontal direction, and adjacent filter media face each other so as to form a V-shaped planar arrangement, and are arranged so as to cross the gas flow passage as a whole. A filter support frame, a cleaning device disposed downstream of the gas flow passage with respect to the filter support frame, for cleaning the filter media, and a filter device mounted between the space above the filter support frame and the cleaning device; An automatic transport device for extracting the media from the array position upward or in the horizontal direction, transporting the cleaned filter media to the cleaning device for cleaning, returning the washed filter media to the extracted array position and inserting the media downward. This is a dust removal device having an automatic regeneration function of a filter medium.

Further, the present invention includes a differential pressure detecting device for detecting a differential pressure of gas pressure between an upstream side and a downstream side of the filter medium inserted in the filter support frame, and the automatic transporting device includes: In response to the output from the differential pressure detecting device, the filter media is reproduced when the detected differential pressure is equal to or larger than a predetermined reproduction reference value.

The filter support frame of the present invention is characterized in that the filter media divided into a plurality of sections in the vertical or horizontal direction are arranged so as to be shifted stepwise in the gas flow direction.

Further, the filter support frame of the present invention is characterized in that a plurality of filter media are arranged so as to traverse a gas flow passage in a curved shape as a whole.

Further, the cleaning apparatus of the present invention is characterized in that the conveyed filter medium is ultrasonically cleaned.

According to the present invention, a bypass door is provided on a partition wall around the filter support frame, the bypass door being opened only in a predetermined emergency, bypassing the filter medium and allowing gas to flow, and normally closed. It is characterized by.

Further, the present invention is characterized in that the automatic conveying device is provided with a hood for preventing the filter medium being conveyed from being shaken by a gas flow.

Further, the cleaning device of the present invention is characterized in that it is disposed separately from a filter medium arranged on a filter support frame.

Further, the filter support frame of the present invention is characterized in that a shield is attached in exchange for a filter medium so that the filter medium can be washed even during operation as a filter.

[0017]

According to the present invention, the filter media are arranged in the filter support frame so as to be vertically insertable or removable. The filter media have a flat plate shape, and adjacent filter media are arranged in a V-shape in a plane while being inserted into the filter support frame, and are arranged so as to cross the gas flow passage as a whole. The gas flowing through the gas flow passage is
Filtered through filter media. Since the filter media is arranged in a V-shape in a plane, the surface area through which the gas passes is larger than the cross-sectional area of the gas flow passage as a whole. The filter media pulled upward or horizontally from the filter support frame is transported by an automatic transport device to a cleaning device and cleaned. The washed filter media is returned to the original position where the filter support frame was pulled out by the automatic transport device, inserted downward or horizontally, and regenerated. Since the removal and insertion of the filter from the filter support frame is performed by an automatic transport device having a lifting function in the vertical and horizontal directions, even a large and heavy filter medium can be easily handled. The filter media to which dust has adhered is transported to the cleaning device, so that the cleaning device can be arranged at a distance from the filter support frame. Filter media can be played.

According to the present invention, the regeneration of the filter media is performed by detecting a differential pressure of gas pressure between the upstream side and the downstream side of the filter medium inserted in the filter support frame. This is performed when the pressure exceeds a predetermined reference value for regeneration. The reproduction timing of the filter media can be automatically determined without human judgment, and the filter media can be efficiently reproduced at an appropriate timing.

Further, according to the invention, the filter support frame arranges the filter media divided into a plurality of sections in the vertical direction so as to be displaced in a stepwise manner in the gas flow direction, so that the space in the depth direction of the gas flow passage is effectively used. The filter media can be arranged by utilizing the above. Also, since the length in the vertical direction is divided, the vertical stroke required when inserting and removing the filter media in each row can be reduced, and the height of the space required for the automatic transport device can be reduced, and gas can be reduced. The filter media can be arranged by effectively utilizing the cross-sectional area of the flow passage.

Further, according to the present invention, the filter support frame comprises:
Since the plurality of filter media are arranged so as to traverse the gas flow passage in a curved shape as a whole, the surface area of the filter media with respect to gas flow can be increased.

Further, according to the present invention, the cleaning device ultrasonically cleans the transported filter media, so that dirt firmly attached to the surface and inside of the filter media can be sufficiently and quickly removed. Further, according to the present invention, a partition door around the filter support frame is provided only with a predetermined emergency and a bypass door is provided to bypass the filter media, so that the gas can be smoothly circulated in an emergency, and Filter media can also be protected.

Further, according to the present invention, a hood is provided in the automatic conveying device to prevent the filter medium being conveyed from being shaken by the gas flow. Can be conveyed.

Further, according to the present invention, the filter medium which is disposed on the filter support frame and performs the filtering operation and the cleaning device for regenerating the filter media are separated from each other. For example, the cleaning device is maintained even when the blower is operating. be able to.

Further, according to the present invention, the filter supporting frame can be washed by attaching a shield in exchange for the filter medium. If the filter media is still extracted from the filter support frame during operation as a filter, gas will pass through the extracted portion without being filtered. If the part is covered with a shield, the filtering function of the filter is not impaired. Since the filter medium to be cleaned is clogged and has a high gas flow resistance, even if it is replaced with a shield, the influence on the overall operation of the filter is small.

[0025]

1 to 4 show a schematic arrangement of a dust removing apparatus having an automatic regeneration function of a filter medium according to an embodiment of the present invention. 1 is a front sectional view, FIG. 2 is a plan sectional view, and FIG. 3 is a sectional line IIIa-IIIa, III of FIG.
FIG. 4 is a cross-sectional view taken along lines b-IIIb and IIIc-IIIc, and FIG. 4 is a simplified perspective view showing the overall arrangement.
The exhaust tunnel 100 is provided for discharging polluted air in the tunnel to the atmosphere, for example, for ventilation of a road tunnel. The exhaust air is contaminated with soot and the like contained in the exhaust gas of the automobile, and is thus removed by the filter 101. A blower 102 is provided downstream of the filter 101, and rotates an exhaust fan to generate a flow of air. From the filter 101 to the blower 102, it is provided in the horizontal portion 100a of the exhaust tunnel 100, the flow direction is changed upward by the guide plate 103,
It flows to the vertical part 100b of the exhaust tunnel. Vertical part 100
A silencer 104 is provided in b to prevent wind noise of an air flow exhausted to the atmosphere and noise from a road tunnel from being emitted into the atmosphere together with exhaust gas. Exhaust tunnel 100
An inlet 105 that opens to the side wall of a road tunnel or the like is provided as an entrance, and an outlet 106 that opens to the atmosphere is provided as an outlet of the exhaust tunnel 100.

A cleaning chamber 110 is provided downstream of the filter 101.
Is provided. In the cleaning chamber 110, a filter cleaning device 111 for cleaning the filter media used for the filter 101, and a pretreatment cleaning device 112 for processing the filter media to be cleaned before being cleaned by the filter cleaning device 111 are provided. Provided. The cleaning liquid is supplied to the filter cleaning device 111 from the cleaning tank 113. Water is supplied from the water absorbing device 114 to the filter cleaning device 111, the pretreatment cleaning device 112, and the cleaning tank 113. The contaminated cleaning liquid after the filter cleaning device 111 and the pretreatment cleaning device 112 clean the filter media, respectively, is discharged at a certain timing to the wastewater treatment device 11.
5 and 116, respectively, to perform wastewater treatment. Cleaning room 1
A main controller 117 is provided for controlling the inside of the apparatus 10 and the entire dust removing apparatus. Filter 101 and cleaning room 11
A transport device control panel 118 is provided for controlling the transport device that transports the filter media between 0 and 0.

The space above the filter 101 and the cleaning chamber 11
A rail 119 is erected between the rails. Rail 11
9, a transport device 120 is suspended and the filter media 1 is suspended.
21 can be transported. Although the cleaning chamber 110 is located on the downstream side of the filter 101, it is separated. Therefore, even when the blower 102 is operating, maintenance of each device for regenerating the filter media is possible, and it is possible to prepare for the need for cleaning.

The filter medium 121 has a flat plate shape, and can be attached to and detached from a predetermined position of a filter mounting base 122 which is a filter support frame. The attachment / detachment of the filter media 121 to / from the filter mounting base 122 is performed by inserting and removing the filter media 121 in the vertical direction. The filter mounting base 122 arranges a plurality of filter media 121 in a shape such that adjacent filter media 121 have a V-shaped planar arrangement and cross the cross section of the exhaust tunnel 100.

A partition wall 123 that partitions the exhaust tunnel 100 is provided around the filter mounting base 122. The partition wall 123 is provided with a plurality of bypass doors 124. When the bypass door 124 is opened, the exhaust tunnel 1
The air sucked into 00 is bypassed by the filter 101 and is sucked by the blower 102 on the downstream side.

In front of the partition wall 123, the smoke detector 12
5 are provided. Behind the filter 101, a differential pressure transmitter 126 is provided. Outputs from the smoke detector 125 and the differential pressure transmitter 126 are provided to the main controller 117. When the differential pressure detected by the differential pressure transmitter 126 is equal to or greater than a predetermined reference value for regeneration, the main control device 117
The transport device 120 is operated via a transport device control plate 118 which is a mobile transport device, and the filter media 121 is pulled out from the filter mounting base 122 for cleaning and regeneration. When the differential pressure detected from the differential pressure transmitter 126 becomes equal to or larger than the reference value, the bypass door 124 is opened by an operation described later, as in the case where the smoke detector 125 obtains a smoke detection output. .

FIG. 5 shows one of the embodiments shown in FIGS.
2 shows a configuration related to an automatic reproduction function of the filter medium 121. The filter media 121 to be reproduced is conveyed while the upper edge portion is gripped by the gripper 130 of the conveyor 120. The gripper 130 can expand and contract in the vertical direction. The filter medium 121 can be immersed in the cleaning liquid at the position of the pretreatment cleaning device 112 or the filter cleaning device 111, and can be pulled up after cleaning. Inside the road tunnel,
As one of means for detecting the occurrence of a fire, a fire detector 127 for detecting a flame to detect a fire is provided in addition to the smoke detector 125 described above. The output from the fire detector 127 is also provided to the main controller 117.

The cleaning of the filter medium 121 in the filter cleaning device 111 and the pretreatment cleaning device 112
A wide surface to be cleaned is held parallel to the inner wall surface of the cleaning tank, and a vibrator having a width smaller than the width of the surface to be cleaned moves in parallel with the inner wall surface to generate ultrasonic waves. Preferably, it is generated. The ultrasonic wave generated in this manner generates a standing wave stably and furthermore, the surface to be cleaned is held in the state of the highest cleaning efficiency, so that the surface and the inside of the filter medium 121 have high cleaning performance. Efficiency is obtained.

Water is supplied from the water absorption device 114 to the cleaning tank 113 and the pretreatment cleaning device 112 via water supply pipes 131 and 132. From the water supply device 114 to the filter cleaning device 111 and the pretreatment cleaning device 112, since the cleaning tank is dirty due to the cleaning of the filter medium 121,
Water for watering before washing is supplied via watering pipes 133 and 134, respectively. The water supply pipes 131 and 132 and the water sprinkling pipes 133 and 134 have solenoid valves 131 for opening and closing.
v, 132v, 133v, and 134v, respectively. Filter cleaning device 111 and pretreatment cleaning device 11
The dirty cleaning liquid used for cleaning in Step 2 is drained 135,
The wastewater is sent to wastewater treatment devices 115 and 116 via 136, respectively. Drain pipes 135 and 136 have solenoid valves 135
v and 136v are provided, respectively. Wastewater treatment equipment 11
From 5,116, the treated wastewater is discharged to the outside of the cleaning room 110 via drainage pipes 137,138. The washing tank 113 is provided with a detergent tank 139. The water supplied through the water supply pipe 131 and the detergent from the detergent tank 139 are mixed, heated, and supplied to the filter detergent device 111 through the hot water supply pipe 140 as a cleaning liquid. Supply. Hot water supply pipe 140
Is provided with a solenoid valve 140v for opening and closing.

The transfer device 120 may be provided with a hood 130h surrounding the gripper 130. The hood 130h covers the filter media 121 being conveyed, and can prevent the filter media 121 from swinging even when the blower 102 is operating and air is flowing. At the time of cleaning, the gripper 130 extends downward, and the filter media 121 comes out of the cover area of the hood 130h and is immersed in the cleaning tank.

FIG. 6 shows a configuration for control of the embodiment shown in FIGS. The filter mounting base 122 displaces the filter media 121 in the depth direction of the exhaust tunnel 100 and arranges the filter media 141, 142, 143, 1.
44, 145, 146. The upper rail 119a is connected to the upper filter rows 141, 142, 143.
This is used for transporting the filter media 121 arranged in the. The lower rail 119b is used to transport the filter media 121 arranged in the lower filter rows 144, 145, and 146. Bypass door 1
24, a lock device 147 is provided, and a partition wall 123 is provided.
The pressure difference between the upstream side and the downstream side of the
Is prevented from being undesirably opened. An upstream pressure sensor 148 is installed on the upstream side of the lowermost filter row 146, and a downstream pressure sensor 149 is installed on the downstream side. The differential pressure transmitter 126 detects a differential pressure between the upstream pressure sensor 148 and the downstream pressure sensor 149. The differential pressure is normal if it is equal to or lower than a certain design point, and a reference value is set so that the filter medium 121 is reproduced when the pressure exceeds the design point. The pressure difference due to the filter medium 121 also changes depending on the air flow speed. The anemometer 150 is the blower 1
02 is also used to confirm that it is stopped. The timing at which the filter media 121 is reproduced is determined by the tunnel central controller 151 to the main controller 117.
Is also determined as one of the criteria.
For example, the reproduction is performed only in the time zone of late night when the traffic volume is small, or when the traffic volume is small for other reasons. In this embodiment, the filter media 1
In order to shorten the cleaning time of the filter 21, the filter cleaning devices 111a and 111b of the A and B systems and the pretreatment cleaning device 1
12a and 112b are provided, and the cleaning tank 113 is provided.
The cleaning liquid is supplied from a and 113b. Filter media 1 cleaned by each filter cleaning device 111a, 111b
The filter 21 is transferred to the dryers 152a and 152b, dried, and returned to a predetermined position on the filter mount 122. In the cleaning tanks 113a and 113b, a detergent tank 139 is provided.
The heaters 153a and 153b are heated so that the detergent supplied from the heaters 139a and 139b can work most efficiently.

FIG. 7 shows the operation of the filter media automatic reproduction function shown in FIG. In step a1, the differential pressure transmitter 1
Based on the output from 26, the differential pressure is detected. Step a
2, the differential pressure is a reference value for performing regeneration, for example, 20 m
It is determined whether or not the value exceeds mAq. If it has exceeded, the process proceeds to step a3, and the tunnel central controller 151
The operation of the cleaning system is started when a preset time has elapsed. In step a4, the blower 102 is stopped, and in step a5, the time is adjusted by a timer operation, and cleaning is performed by two systems.

In one cleaning system A, step a6
Then, the transporter 120 moves from the storage location provided at one end of the rail 119 to the filter mounting base 122. Step a
7, the filter media 121 is attached to the filter mounting base 122.
And is mounted on the transfer device 120. In step a8, the transporter 120 moves from the position of the filter mount 122 to the pretreatment cleaning device 112a, and transports the filter media 121. In step a9, the pretreatment cleaning of the filter media 121 is performed by the pretreatment cleaning device 112a. In the pretreatment cleaning, ultrasonic cleaning is performed in a state of being immersed in water without using a detergent. Next, in step a10, the transporter 120 moves from the pretreatment cleaning device 112a to the filter cleaning device 111a, and transports the filter media 121. In step all, the filter cleaning device 111a is operated to clean the filter media 121. In step a12, the transporter 120 is set to the filter cleaning device 111a.
Further, the filter media 121 is moved to the dryer 152a.
Transport. In step a13, the dryer 152a is operated to remove water adhering to the filter medium 121. In step a14, the transporter 120 moves from the dryer 152a to the filter mount 122, and
Carry one. In step a15, the filter medium 121 is detached from the carrier 120, and the filter
2. Insert it into the predetermined position and fix it.

In step a16, the pretreatment cleaning device 11
In step 2, it is determined whether the washing water needs to be replaced. For example, 2
When the zero filter medium 121 is washed, it is determined that the washing water needs to be changed, the washing water is changed in step a17, and the wastewater treatment by the wastewater treatment device 116 is performed in step a18. Next, in step a19,
It is determined whether or not the cleaning water needs to be changed in the filter cleaning device 111a. For example, 40 filter media 1
When it is determined that the washing water needs to be replaced when the washing water 21 has been washed, the washing water is replaced in step a20, and step a
At 21, waste water treatment is performed by the waste water treatment device 115.

Next, in step a22, it is determined whether the number of sheets to be cleaned of the filter media 121 has been processed. If it is determined that the processing has not been completed, step a
At 23, it is determined whether or not the system operation end time set by the tunnel central controller 151 has been reached. If the end time has not been reached, step a24
The transporter 120 moves to the next array position of the filter media 121, and the process returns to step a7.

In the time adjustment by the timer operation in step a5, when the B-series apparatus is used, the same regeneration processing as in steps a6 to a24 is performed in step a30 by using the filter cleaning device 111b, the pretreatment cleaning device 112b, and the dryer. This is performed using the device on the 152b side. Step a
If it is determined in step 22 that the number of sheets to be cleaned has been processed, or if it is determined in step a23 that the system operation has ended, the flow proceeds to step a40, in which the operation of the cleaning system is stopped, and in step a41, the blower 102 is stopped.
To return to normal operation as an exhaust tunnel.

FIG. 8 shows an emergency operation state when the pressure difference becomes abnormally high by the structure of FIG. Step b1
In step b2, the differential pressure is intermittently detected in accordance with the timer set value for several seconds. In step b3, it is determined whether or not the differential pressure detected by the differential pressure transmitter 126 is equal to or greater than a reference value of, for example, 30 mmAq. If the difference is not equal to or larger than the reference value, the process returns to step b2 to continue the differential pressure detection at regular time intervals. When the differential pressure is equal to or higher than the reference value, a lock release command is issued from the main control device 117 to the lock device 147, and the lock device 147 is released in step b4. Next, the main controller 117 instructs the bypass door 124 to “open”, and sets the bypass door to “open” in step b5. Next, the main controller 11
7 instructs the transport device control plate 118 to stop the operation of the transport device 120, and stops the transport device 120 in step b6. Next, the main control device 117 sends the pretreatment cleaning device 112
To the filter cleaning device 111 and the dryer 152, "OFF" is instructed.
2. Turn off the power of the filter cleaning device 111 and the dryer 152. Next, the main controller 117 notifies the tunnel central controller 151 of the occurrence of an abnormal situation, and step b8
Displays the occurrence of an abnormal situation on the tunnel central control device, and terminates the operation in step b9.

FIG. 9 shows an operation corresponding to an abnormal state when a fire is detected in the configuration of FIG. In step c1,
When the smoke detector detects an abnormal state, a timer is set for a few seconds in step c2, and in step c3, it is determined whether the smoke detector detects an abnormal state again to determine whether or not the state is abnormal. When it is determined that the state is abnormal, the process proceeds to step c4, and the lock device 147 is released. Hereinafter, the operations from step c4 to step c9 are basically the same as the operations from step b4 to step b9 in FIG. If it is determined in step c3 that the state is not abnormal, the current state is maintained in step c10, and
7 is not released and the bypass door 124 is not opened. The operation when the fire detection is performed by the output from the fire detector 127 is the same as that in step c2 and subsequent steps.

FIGS. 10A and 10B show the concept of attaching and detaching the filter media 155 of the horizontal embodiment to and from the filter mounting base 156 in FIG. 10A and the concept of attaching and detaching the filter media 121 to and from the filter mounting base 121 of the vertical embodiment in FIG. Are shown in comparison. The planar arrangement of the filter media 155 and the filter media 121 is the same as in the horizontal and vertical embodiments in which adjacent filter media are arranged in a V-shape, but the insertion and removal directions are different. Filter media 155 is horizontal 155a,
Since the insertion and removal is performed at 155b, the insertion and removal directions 155a and 155b are significantly different from the V-shaped planar arrangement. In the case of manual insertion and removal, it is difficult to handle the large filter media 155. On the other hand, the filter media 121 and 155 according to each embodiment are
1b and the insertion and removal in the horizontal direction 155a, 155b are automated, so that a large area can be handled. However, since the insertion / extraction stroke increases,
It is preferable to divide the vertical direction into a plurality of sections and arrange them in a stepwise manner using the depth from the upstream side to the downstream side of the exhaust tunnel 100 as shown in FIG.

FIGS. 11 and 12 show the structure of a filter according to another embodiment of the present invention. The filter media 161 of the present embodiment are also arranged in a stepwise manner by the filter mounting base 162. The width of the filter media arranged above the stairs is reduced in accordance with the cross-sectional shape of the tunnel. The filter mount 162 below the stairs is wider. Partition wall 163 around filter mount 162
Is provided with a bypass door 164,
A rail 169 is provided behind 64. FIG.
11A shows a planar arrangement, and FIG. 11B shows an arrangement state as viewed from the front. FIG. 12 shows a state further seen from an oblique direction. As shown in FIG. 11B, the uppermost filter medium 161 is composed of six sheets, and
Each of the third, fourth, and fourth stages has 19 sheets. The length L1 of each filter media 161 is about 1 m,
The width L2 is also about the same.

FIG. 13 shows a basic concept of still another embodiment of the present invention, in which the filter rows 170a are simply arranged on a straight line perpendicular to the air flow direction 169 as shown in FIG. Instead, it can be arranged in a curved manner as shown in FIG. When the filter media is arranged so as to be curved as a whole as in the filter row 170b, the width T3 of the same tunnel is
In FIG. 13A, 12 pairs of filter media can be arranged, whereas in FIG. 13B, 18 pairs of filter media can be arranged. Further, it is preferable that the direction in which the filter row 170b is curved as shown in FIG. 13B is convex or concave toward the upstream side.
By making the shape convex or concave toward the upstream side, the area of the filter medium can be increased.

According to each of the above embodiments, the following effects can be obtained. This eliminates the need for manual filter cleaning work in a bad environment, saves labor, and is also preferable in terms of worker health management. All the operation of regenerating the filter media is automated, tunnel maintenance and management costs are greatly reduced, and energy and labor can be saved. Since the filter media is handled by a dedicated device, there is almost no wear of the filter at the time of filter cleaning, and the number of times that the filter media can be repeatedly reproduced and used is greatly extended, thereby achieving resource saving. Since the filter media can be completely cleaned, it is possible to equip the filter media with the optimum mesh from the beginning, and to maintain a stable filtration function. If cleaning is not sufficient, a filter having a coarser mesh than required at the time of design must be provided to prepare for a clogging condition in the future, so that the filtering function is not stable.

Further, since the filter 101 and the cleaning chamber 110 can be separately provided, unlike a conventional dust-removing device having a roll-type automatic regeneration function, the device does not need to be a large-scale device at one location, and the tunnel can be easily replaced. The devices can be dispersedly arranged by effectively utilizing the depth of the flow passage.

Further, since a rail 119 is provided in the space between the filter 101 and the cleaning chamber 110 and can be automatically conveyed and moved by the conveying machine 120, the filter medium 121 is manually removed by a human. Or transported by human hands.

Further, removal and transport of the conventional filter media require a great deal of work time and labor, but if a plurality of rails 119 are provided, the filter media 121 can be washed in parallel. And cleaning time is greatly reduced.

Further, conventionally, the filter media is V-type 1
Although it is difficult to mechanize the removal as the surface arrangement method, the arrangement of the filter media 121 can be made stepwise so that the removal can be made mechanized, and the different stages can be worked simultaneously in parallel.

Although the size of the conventional filter media is limited on the assumption that it is manually removed and transported, since a machine is used to remove the filter media from the arrangement position, the size of one filter media 121 is reduced. Therefore, the area of the entire filter 101 can be increased, and the number of installed filters can be reduced.

As a conventional emergency response, a filter media is opened by using a part of a narrow space only in the case of a fire to directly take measures against the fire.
No measures have been taken against large differential pressures. For this reason, sometimes the filter media and the blower are damaged by the suction pressure due to the large differential pressure. According to the present invention, by providing the bypass door 124, it is possible to automatically cope with an increase in the differential pressure, and to monitor the differential pressure without using a large amount of unnecessary energy and preventing fire and smoke. Automatic discharge becomes possible, and the situation that the filter medium 121 is damaged can be prevented.

Conventionally, it was difficult to extract the filter media in the V-shaped arrangement in the horizontal direction, and therefore, it was difficult to mechanize the filter media. It's easy.

In addition, although there is no conventional idea of providing the bypass door 124, the bypass door 124 is provided, the lock device 147 is automatically released, and the opening of the bypass door 124 is also reliably automated.

Further, the filter media 121, 155
Is divided into pretreatment cleaning using only water cleaning and main cleaning using a detergent, so that the amount of detergent used for main cleaning can be saved. In addition, hood 130h
Is provided to prevent shaking during conveyance even during the tunnel ventilation operation of the exhaust tunnel, and to prevent the filter media 121,
155 can be cleaned. Further, if a shield that closes the extraction mark is inserted in exchange for the filter media 121 and 155 to be extracted, the function as a filter is not impaired.

Further, in each of the above embodiments, the dust removing device provided in the exhaust tunnel 110 attached to a road tunnel or the like is shown. However, in the process of removing dust and the like from gas in various industrial plants, the same as this embodiment. The present invention can be applied to

[0057]

As described above, according to the present invention, a flat filter medium is inserted into and removed from the filter support frame in the vertical direction, and the automatic transfer device is provided to the cleaning device disposed at an interval from the filter. Can transport and clean each filter media, and insert the cleaned filter media into the original arrangement position to automatically reproduce the media. Since the filter media is inserted and removed vertically or horizontally by the automatic transport device, it is possible to use a filter media that is heavier and has a larger surface area than handled manually, reduces the number of filter media used, and reduces It is possible to reduce the number of times that the filter media need to be inserted and removed, and to reduce the work time required for reproducing the entire filter media. In addition, since the filter medium is inserted and removed in the vertical and horizontal directions, it is easy to insert the filter medium into a predetermined arrangement position by using gravity when inserting the filter medium in the vertical direction.

According to the present invention, the filter medium is reproduced when the differential pressure of the gas passing through the filter medium is detected and the differential pressure is equal to or higher than a predetermined reference value for reproduction. The reproduction can be performed at an appropriate timing without requiring a great deal of manpower to monitor the file. If the pressure is not increased even if the pressure difference increases, the pressure corresponding to the filter media eventually becomes greater than the force that the filter support frame can withstand, and the filter media comes off and is damaged, and the blower etc. is damaged. However, it is possible to automatically play the filter media before reaching such a pressure difference.

According to the present invention, since the filter media are arranged so as to be curved and traverse the gas flow passage,
Compared with the cross-sectional area of the gas flow passage, the filter media can be arranged with a larger surface area, so that an efficient dust removing operation can be performed.

Further, according to the present invention, since the filter medium is cleaned by ultrasonic cleaning, quick and sufficient cleaning can be performed even when strong dirt is adhered to the surface and the inside of the filter medium.

According to the present invention, a bypass door is provided around the filter media, and in an emergency, the bypass door is opened to bypass the filter media. Can be distributed.

Further, according to the present invention, since the hood is provided in the automatic transfer device, it is possible to prevent the filter medium being transferred from being shaken by the gas flow even during operation of the blower or the like.

Further, according to the present invention, since the place for disposing the filter media and the cleaning device for regenerating the filter media are separated, maintenance of the cleaning device can be performed even during operation of the blower or the like.

Further, according to the present invention, since a shield can be attached to the filter support frame in exchange for the filter medium, the filter medium can be washed without impairing the function as a filter even during operation of the blower or the like.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an embodiment of the present invention.

FIG. 2 is a simplified plan sectional view of the embodiment of FIG.

FIG. 3 is a sectional line IIIa-IIIa, IIIb of FIG. 1;
It is sectional drawing seen from -IIIb and IIIc-IIIc.

FIG. 4 is a perspective view of the embodiment of FIG. 1;

FIG. 5 is a simplified perspective view showing a configuration for a reproduction function of a filter medium in the embodiment of FIG. 1;

FIG. 6 is a block diagram showing an electrical configuration for controlling a reproduction function of the filter medium of the embodiment of FIG. 1;

FIG. 7 is a flowchart showing the operation of the configuration of FIG. 6;

FIG. 8 is a flowchart showing the operation of the configuration of FIG. 6 when the differential pressure increases.

FIG. 9 is a flowchart showing an operation of the configuration of FIG. 6 when an abnormal state occurs.

FIG. 10 is a perspective view showing an arrangement state of filter media in the embodiment of FIG. 1 in comparison with a conventional arrangement state of filter media.

FIG. 11 is a plan view and a front view showing a filter media arrangement according to another embodiment of the present invention.

FIG. 12 is a perspective view of the embodiment of FIG. 11;

FIG. 13 is a simplified plan view showing an arrangement state of a filter medium according to still another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Exhaust tunnel 101 Filter 102 Blower 110 Cleaning chamber 111, 111a, 111b Filter cleaning device 112, 112a, 112b Pretreatment cleaning device 113, 113a, 113b Cleaning tank 116, 117 Wastewater treatment device 117 Main control device 118 Transport device control panel 119 , 169 rail 120 transporter 121, 155, 161 filter media 122, 156, 162 filter mount 123, 163 partition wall 124, 164 bypass door 125 smoke detector 126 differential pressure transmitter 127 fire detector 139, 139a, 139b Detergent tanks 141 to 146 Filter row 147 Locking device 148 Upstream pressure sensor 149 Downstream pressure sensor 151 Tunnel central control device 170a, 170b Filter row

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FIF24F 7/007 F24F 7/007 B (72) Inventor Shingo Hatanaka 3-1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Kobe factory

Claims (9)

(57) [Claims] 1. A dust removing apparatus provided in a gas flow passage and having an automatic regeneration function of a filter medium for filtering dust contained in a gas, wherein a plurality of flat filter media is vertically or horizontally mounted. A filter support frame that allows adjacent filter media to face each other so as to form a V-shaped planar arrangement, and that is arranged so as to cross the gas flow path as a whole; A cleaning device that is disposed downstream of the filter media and cleans the filter media; and is installed between the cleaning device and the space above the filter support frame. To the cleaning device for cleaning, return the cleaned filter media to the extracted array position, and insert it downward or horizontally. A dust removing device having an automatic regeneration function of a filter medium, comprising: an automatic transport device. 2. The automatic transfer device according to claim 2, further comprising a differential pressure detecting device for detecting a differential pressure of gas pressure between an upstream side and a downstream side of the filter medium inserted in the filter supporting frame. 2. The automatic reproduction of a filter medium according to claim 1, wherein the reproduction of the filter medium is performed when the detected differential pressure is equal to or more than a predetermined reproduction reference value in response to an output from the detection device. Dust removal device with functions. 3. The filter support frame according to claim 1, wherein the filter media divided into a plurality of sections in a vertical direction are arranged so as to be displaced stepwise in a gas flow direction.
Or a dust removing device having an automatic regeneration function of the filter media according to 2. 4. The filter support frame according to claim 1, wherein a plurality of filter media are arranged so as to traverse the gas flow path in a curved shape as a whole.
3. A dust removing device provided with the filter media automatic regeneration function according to any one of 3. 5. The cleaning device according to claim 1, wherein the conveyed filter medium is ultrasonically cleaned.
4. A dust removing device provided with an automatic regeneration function of the filter media according to any one of 4. 6. A partition wall around the filter support frame,
A bypass door which is opened only in a predetermined emergency and bypasses the filter medium to allow gas to flow and is normally closed is provided.
6. A dust removing device having the function of automatically regenerating a filter medium according to any one of 5. 7. The automatic reproducing apparatus for a filter medium according to claim 1, wherein a hood for preventing the filter medium being conveyed from being shaken by a gas flow is provided in the automatic conveying apparatus. Dust removal device provided. 8. The filter medium according to claim 1, wherein the cleaning device is provided separately from a filter medium arranged on a filter support frame. Dust removal device. 9. The filter support frame according to claim 1, wherein a shield is attached to the filter support frame in exchange for the filter medium, so that the filter medium can be washed even during operation as a filter. A dust remover having an automatic regeneration function of the filter media according to any one of the above.