JP4627765B2 - Filter regeneration method and apparatus for tunnel ventilation gas purification device - Google Patents

Description

  The present invention relates to a technique for regenerating a purification device for purifying ventilation gas from a tunnel.

  Conventionally, as a system for ventilating inside an automobile road tunnel, a ventilation passage leading to the tunnel, a blower for forming a flow of ventilation gas from the tunnel in the ventilation passage, and the ventilation passage And a purification device for performing a dust removal treatment of the ventilation gas is known. As the purification device, one that removes soot in the ventilation gas using a dust removal filter is known.

The dust filter is clogged as it is used, the gas flow resistance increases, and ultimately the original function is impaired. Therefore, the filter needs to be periodically subjected to a regeneration process. In order to perform this regeneration process, it is known that the purification device is composed of a plurality of filter units. Each filter unit includes the dust removal filter and a case for holding the dust removal filter, and is arranged vertically and horizontally on a plane orthogonal to the ventilation direction of the ventilation passage. When the dust removal filter is regenerated, the filter units are sequentially extracted from the locations where they are disposed and regenerated by a predetermined regenerating facility.
JP-A-9-165999

  In order to attach and detach the filter unit, complicated equipment such as a crane and a lifter is required, and the operation is not easy. Furthermore, the dust or the like captured by the filter is likely to fluctuate during the attachment / detachment, and the working environment is not preferable.

  As a method of regenerating the filter unit at the site, so-called air regeneration in which high pressure air is blown into the target unit is known, but the regeneration effect is not high, and regeneration is performed as the number of regeneration increases. There is an inconvenience that the frequency of arrival of necessary time increases at an accelerated rate. In addition, a large blower is required to pump the air for air regeneration, and it is difficult to move the blower. Therefore, each filter unit must be transferred to the position where the blower is installed. Therefore, a complicated transfer mechanism is required for this purpose.

  In view of such circumstances, an object of the present invention is to provide a technique for efficiently and effectively regenerating the filter unit without requiring attachment or detachment or movement of the filter unit.

As means for solving the above-mentioned problems, the present invention comprises a plurality of filter units including dust removal filters, and these filter units are arranged on a plane perpendicular to the ventilation direction in a ventilation air passage communicating with the tunnel. The filter units are arranged vertically and horizontally, and each filter unit has a first dust removal filter disposed so as to incline in a direction perpendicular to the ventilation direction so as to face an upstream side in the ventilation direction, and a downstream side in the ventilation direction. A method for regenerating each dust removal filter of a tunnel ventilation gas purification apparatus including a second dust removal filter arranged to be inclined in a direction perpendicular to the ventilation direction inclined to face. the tunnel ventilation gas purification apparatus with placing the first nozzle unit having a jettable nozzle cleaning water on the upstream side of the tunnel ventilation gas purifying device The wash water is disposed a second nozzle unit having a jettable nozzle downstream, the cleaning from the nozzle while maintaining the orientation nozzle of the first nozzle unit directed to the tunnel ventilation gas purifying device Water is sprayed and applied to the upper surface of the first dust removing filter of any one of the filter units, and the nozzle of the second nozzle unit is washed from the nozzle while maintaining a posture directed to the tunnel ventilation gas purification device. An injection step of injecting water onto the upper surface of the second dust removing filter of any one of the filter units, and the nozzle units are injected from the nozzles by translating along the arrangement direction of the filter units. And a nozzle transfer step of sequentially changing the dust removal filter to which the cleaning water hits. In which sequentially cleans the dust removal filter in the filter unit.

  In this method, the nozzle unit having nozzles for injecting cleaning water is transferred along the arrangement direction of the filter units arranged in the vertical and horizontal directions, so that the cleaning of the dust removal filter by the injection of the cleaning water is sequentially executed. The Therefore, regeneration of each filter unit is realized without requiring the attachment or detachment or movement of the filter unit. Moreover, the nozzle unit for injecting the cleaning water is lighter and smaller than, for example, a blower for pumping air for the purpose of air regeneration of the filter, and there is no hindrance to the transfer of the nozzle unit. Moreover, rinsing of the dust removal filter with the rinsing water sprayed from the nozzle unit exhibits a higher regeneration effect than the air regeneration.

  In the nozzle transfer step, it is preferable to transfer the nozzle unit so that the dustproof filter is cleaned in order from the upper filter unit. Such transfer prevents the regenerated dust filter from being contaminated again by dirty water generated by cleaning other filters. That is, the dirty water generated by the filter cleaning flows down from the filter as it is, and in order to prevent the dirty water from contaminating the regenerated dust filter, it is effective to perform the cleaning in order from the upper filter.

  In particular, in the injection step, a nozzle unit having a nozzle injection region extending in the entire width direction of each filter unit is used as the nozzle unit. In the nozzle transfer step, the nozzle unit is By removing the filter units from the top along the column for each column, the dust removal filters in all the filter units can be cleaned efficiently and uniformly.

In the present invention, the filter for dust removal of each filter unit is arranged so as to incline in a direction perpendicular to the ventilation direction, and the injection step is performed between the upstream side and the downstream side of the tunnel ventilation gas purification device. Since the cleaning water is sprayed from the side where the upper surface of the dust removal filter faces and is applied to the upper surface of the dust removal filter , the injected cleaning water hits the upper surface side of the dust removal filter to be cleaned. The filter is effectively washed and flows down from the filter as it is.

More specifically, each filter unit includes a first dust removal filter that is inclined so as to face the upstream side in the ventilation direction, and a second dust removal filter that is inclined so as to face the downstream side in the ventilation direction. see containing the injection process, as the nozzle unit, the second nozzle unit on the downstream side of the tunnel ventilation gas purifying device with disposing the first nozzle unit on the upstream side of the tunnel ventilation gas purifying device The cleaning water sprayed from the nozzle of the first nozzle unit is applied to the upper surface of the first dust removal filter, and the cleaning water sprayed from the nozzle of the second nozzle unit is the second dust removal. since those shed on the upper surface of use filter, wherein relative to the first dust filter and the second dust filter, in both the wash water is applied to the upper surface side , Washing the filter both dust are effectively performed.

  In that case, the nozzle transfer step may alternately perform injection from the first nozzle unit and injection from the second nozzle unit, or wash water from the first nozzle unit. A period in which the injection and the injection of the washing water from the second nozzle unit are performed simultaneously may be included. In the latter case, the cleaning water is sprayed while shifting the positions of the two nozzle units so that the cleaning water sprayed at the same time does not interfere with each other in the period, thereby more effectively using the energy of the cleaning water. can do.

The present invention also includes a plurality of filter units including a dust removal filter, and the ventilation gas for tunnels arranged in a vertical and horizontal direction on a plane orthogonal to the ventilation direction in a ventilation air passage through which these filter units communicate with the tunnel. A device for regenerating a dust removal filter of each filter unit in a purification device, comprising a nozzle capable of injecting wash water, and at least one side upstream and downstream of the ventilation gas purification device for tunnel A nozzle unit, a water supply device for supplying cleaning water to the nozzle unit and injecting the cleaning water from the nozzle, and a posture in which the nozzle unit is directed to the tunnel ventilation gas purification device And moving the nozzle unit in parallel along the arrangement direction of the filter units. And a unit transfer device nozzles of the nozzle unit changes the filter unit to be oriented, wherein the filter unit includes a first dust filter which is inclined so as to face the upstream side of the ventilating direction, downstream of the ventilating direction A second dust removal filter that is inclined to face the first nozzle unit disposed on the upstream side of the tunnel ventilation gas purification device as the nozzle unit, and the tunnel ventilation gas purification device A second nozzle unit disposed on the downstream side of the first nozzle unit, and the nozzle transfer device is configured so that the cleaning water sprayed from the nozzle of the first nozzle unit hits the upper surface of the first dust removal filter. A first nozzle transfer device that translates the first nozzle unit, and cleaning water sprayed from the nozzles of the second nozzle unit Is obtained by a second nozzle transferring device for moving in parallel the said at second hits the upper surface of the dust filter position the second nozzle unit.

The present invention also includes a plurality of filter units including a dust removal filter, and the ventilation gas for tunnels arranged in a vertical and horizontal direction on a plane orthogonal to the ventilation direction in a ventilation air passage through which these filter units communicate with the tunnel. A device for regenerating a dust removal filter of each filter unit in a purification device, comprising a nozzle capable of injecting wash water, and at least one side upstream and downstream of the ventilation gas purification device for tunnel A nozzle unit, a water supply device for supplying cleaning water to the nozzle unit and injecting the cleaning water from the nozzle, and a posture in which the nozzle unit is directed to the tunnel ventilation gas purification device And moving the nozzle unit in parallel along the arrangement direction of the filter units. A unit transfer device that changes a filter unit to which a nozzle of the nozzle unit is directed, and the nozzle unit includes a spray area of the nozzle included in the nozzle unit that extends over the entire width direction of the dust removal filter in each filter unit. A plurality of nozzles arranged in a specific direction and a unit main body for holding these nozzles, wherein the water supply device simultaneously ejects cleaning water from the nozzles, and the nozzle transfer device comprises: The nozzle unit is moved in parallel while holding the unit body of the nozzle unit in a posture in which the nozzles are arranged in a horizontal direction, and each nozzle of the nozzle unit has a specific spread in the lateral direction. Wide-angle injection on the injection surface, adjacent to each other when viewed from above That ejection area between the nozzles are respectively arranged at positions overlapping, and that the injection surface of each nozzle so that the interference is avoided actual washing water together with the overlapping region is inclined with respect to the horizontal direction It is.

According to this structure, the injection area | region which has the breadth over the whole width direction of a filter unit can be formed by juxtaposing a plurality of nozzles. Then, by lifting and lowering the plurality of nozzles integrally with the unit body, it is possible to efficiently and evenly clean the dust removal filters of the filter units in each column.

More specifically, each nozzle of the nozzle unit performs wide-angle injection on a specific injection surface that spreads in the lateral direction, and is disposed at a position where the injection areas of nozzles adjacent to each other overlap each other when viewed from above. In addition, since the ejection surface of each nozzle is inclined with respect to the horizontal direction so as to avoid interference between actual cleaning waters in the overlapping area, the ejection area of the entire nozzle unit is continuous in the horizontal direction. To do. In addition, since the ejection surfaces of the nozzles are inclined with respect to the horizontal direction so as to avoid interference between the actual cleaning waters in the overlapping region, energy loss due to the interference between the cleaning waters is avoided. .

  In addition, the nozzle unit is arranged along the vertical column for each column of the filter unit as long as the injection region of the nozzle included in the nozzle unit has a spread over the entire width direction of each filter unit. The dust filter can be cleaned efficiently and uniformly.

  In this case, the nozzle transfer device includes a lifting support member that supports the nozzle unit so that the nozzle unit can be lifted, a lifting drive device that lifts the nozzle unit along the lifting support member, and the lifting support member. A horizontal support member that supports the filter unit so as to be movable in a horizontal direction along the arrangement surface of the filter units, and the elevating support member and the nozzle unit supported by the elevating support member along the horizontal support member horizontally. What has the horizontal drive device moved to a direction is suitable. In this apparatus, among the transfer of the nozzle unit in each direction, the low-frequency horizontal transfer is performed by combining the nozzle unit and the lifting support member, while the high-frequency vertical transfer is performed by the nozzle unit alone. Since this can be done, the energy required to transfer the nozzle unit is saved.

  The present invention also relates to a tunnel ventilation system for ventilating a gas in a tunnel, wherein the ventilation air passage communicates with the tunnel, and the gas from the tunnel side to the exhaust side in the ventilation air passage. And a plurality of filter units including a dust filter, and these filter units are arranged in the ventilation air passage vertically and horizontally on a plane orthogonal to the ventilation direction. A purification device and a filter regeneration device of any one of the tunnel ventilation gas purification devices, and the ventilation air passage includes a ventilation gas purification device for the tunnel ventilation when the tunnel ventilation gas purification device is used. A retreat space for retreating the nozzle unit of the filter regeneration device is secured at a position deviating from the arrangement area of each filter unit.

  In this system, by using the filter regeneration device, regeneration processing by cleaning the dust removal filter in each filter unit is efficiently and effectively performed. In addition, when the filter unit is not regenerated, the function of each filter unit can be satisfactorily performed by retreating the nozzle unit of the filter regenerating apparatus to a retreat space that is out of the area where the filter unit is disposed, without causing the nozzle unit to get in the way. .

  As described above, according to the present invention, the nozzle unit for injecting cleaning water is moved along the arrangement direction of the filter units, so that the filter for dust removal in each filter unit can be regenerated without requiring attachment or detachment or movement of the filter units. Can be efficiently and effectively performed.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a tunnel 10 and a ventilation system for ventilating gas in the tunnel 10.

  The ventilation system includes a ventilation air passage 12 that communicates with the tunnel 10, a gate 14 that is provided in this ventilation air passage 12 in order from the upstream side, a plurality of ventilation gas purification devices 16, and a blower 17. . The gate 14 is disposed so as to face the tunnel 10. The blower 17 forms a gas flow from the tunnel 10 and the gate 14 side toward the exhaust side. Each ventilation gas purification device 16 is arranged in the left-right direction at a position between the gate 14 and the blower 17, and each device 16 captures the dust in the ventilation gas flowing by the operation of the blower 17. This trapping purifies the gas. The gas that has passed through the ventilation gas purification device 16 and the blower 17 is gathered by the air collecting pipe 18 on the downstream side thereof, and is discharged to the atmosphere from an appropriate place through the exhaust pipe 20.

Each ventilation gas purification device 16 includes a plurality of filter units 22 as shown in FIG. 2 and a frame 24 that holds these filter units 22. The filter units 22 are arranged vertically and horizontally on a plane perpendicular to the ventilation direction in the ventilation path 12 in the frame 24. FIG. 2 shows a state in which a total of 20 filter units 22 are arranged in 5 rows and 4 rows for convenience, but in this embodiment, exactly as shown in FIGS. Blocks in which a total of 50 filter units 22 are arranged in 10 rows and 5 rows are further arranged in three upper and lower stages.

  Each filter unit 22 includes a plurality (two in the illustrated example) of first dust removal filter 26A and second dust removal filter 26B arranged in the vertical direction, and these dust removal filters 26A and 26B from the left and right. And a pair of side walls 28 to be held.

  The first dust removal filter 26A and the second dust removal filter 26B are alternately arranged in the vertical direction and arranged in a posture inclined in the ventilation direction. Of these, the first dust removal filter 26A is disposed in an inclined posture so as to face the upstream side in the ventilation direction, and conversely, the second dust removal filter 26B faces the downstream side in the ventilation direction. Arranged in an inclined posture.

  The both side walls 28 have a trapezoidal shape whose height decreases from the upstream side to the downstream side in the ventilation direction, and the dustproof filters 26A and 26B are sandwiched between the side walls 28. That is, the dust-proof filters 26A and 26B are arranged in such a manner that the W-shape is turned sideways when viewed from the side, and the left and right side edges thereof are fixed to the side walls 28, respectively.

  For example, a non-woven fabric is applied to each of the dust removal filters 26A and 26B. The material is not particularly limited as long as it has a function of capturing dust in the gas. In practice, a soft filter body made of the nonwoven fabric or other material is stretched around a frame (not shown), and the left and right side portions of the frame are fixed to the inner surface of each side wall 28.

  As shown in FIGS. 3 to 10, the filter regeneration device according to the present invention is attached to each ventilation gas purification device 16. Each filter regenerator includes the first nozzle unit 30A and the second nozzle unit 30B disposed upstream of the ventilation gas purification device 16 in the ventilation direction (exhaust direction), and the first nozzle unit 30A. The first nozzle transfer device 40A for transferring along the arrangement direction (vertical and horizontal directions) of the filter units 22 and the second nozzle unit 30B are transferred along the arrangement direction (vertical and horizontal directions) of the filter units 22. A second nozzle transfer device 40B.

  As shown in FIGS. 8 and 10, each of the nozzle units 30A and 30B includes a plurality of (three in the illustrated example) nozzles 32 arranged in the horizontal direction, and a unit main body that holds these nozzles 32 in the arrangement state. 34. The unit main body 34 includes a held portion 36 that extends to the opposite side (outside) of the filter regeneration device 16, and the held portion 36 is held by the nozzle transfer device 40A (40B) so as to be movable up and down. .

  Each of the nozzles 32 is for injecting washing water for washing the dust removal filters 26A and 26B, and performs wide-angle injection as shown in FIGS. 10 (a) and 10 (b) on a specific injection surface. Its tip shape is designed to do. As shown in the figure, these nozzles 32 are respectively arranged at positions where the injection regions 38 of the nozzles 32 adjacent to each other overlap each other when viewed from above. Thereby, the injection area | region (injection area | region of nozzle unit 30A, 30B whole) which continues in the horizontal direction over the width direction whole region of each said filter unit 22 is ensured. Furthermore, an appropriate inclination angle θ with respect to the horizontal direction is given to the ejection surface of each nozzle 32 so as to avoid interference between actual cleaning waters in the region 38a where the ejection regions 38 overlap each other ( (B) in FIG.

In the nozzle transfer device 40A, the nozzle 32 directs the filter regeneration device 16 from the upstream side while maintaining the arrangement state of the nozzles 32 of the nozzle units 30A and 30B on the upstream side of the filter regeneration device 16. Translate horizontally and vertically by posture. Similarly, the nozzle transfer device 40B is configured such that the nozzle 32 moves the filter regeneration device 16 downstream from the filter regeneration device 16 while maintaining the arrangement of the nozzles 32 of the nozzle units 30A and 30B. Translate horizontally and vertically in a posture oriented from the top.

  Specifically, the nozzle transfer devices 40A and 40B according to this embodiment include a vertical guide rail 42 and two upper and lower horizontal guide rails 43 and 44 as shown in FIGS. And a horizontal driving device 48.

  The vertical guide rail 42 corresponds to an elevating support member that supports the nozzle unit 30A (30B) to be movable up and down, and is installed in a posture extending in the vertical direction. The rear end portion of the held portion 36 of the nozzle unit 30 </ b> A (30 </ b> B) is connected to the vertical guide rail 42 so that it can be moved up and down along the vertical guide rail 42. Specifically, a plurality of rollers 37 as shown in FIGS. 8 and 9 are attached to the held portion 36 so as to be rotatable around a horizontal axis parallel to the longitudinal direction of the held portion 36. Is engaged with the vertical guide rail 42 so as to be able to roll on the vertical guide rail 42.

  The horizontal guide rails 43 and 44 correspond to horizontal support members that support the vertical guide rails 42 so that the vertical guide rails 42 can move in the horizontal direction along the arrangement surface of the filter units 22. They are arranged up and down in a horizontal posture parallel to each other.

  As shown in FIGS. 3 and 4, the upper horizontal guide rail 43 is fixed at a position above the arrangement region of the filter units 22, and the upper end of the vertical guide rail 42 corresponds to the horizontal guide rail 43. It is connected so as to be movable along the lateral guide rail 43. Specifically, a plurality of rollers 52 are attached to the upper end of the vertical guide rail 42 via a bracket 50 as shown in FIG. 7 so as to be rotatable about a horizontal axis, and these rollers 52 roll on the horizontal guide rail 43. It is engaged with the lateral guide rail 43 so as to be movable.

  Similarly, as shown in FIG. 4, the lower horizontal guide rail 44 is laid on the ground at a position immediately below the arrangement region of the filter units 22, and the vertical guide rail 44 is connected to the horizontal guide rail 44. The lower ends of 42 are connected so as to be movable along the horizontal guide rail 44. Specifically, a plurality of rollers 54 as shown in FIGS. 3 and 4 are attached to the lower end of the vertical guide rail 42 so as to be rotatable about a vertical axis, and these rollers 54 roll along the horizontal guide rail 44. It is engaged with the lateral guide rail 44 so as to be movable.

  The raising / lowering driving device 46 is for raising and lowering the nozzle unit 30A (30B) along the vertical guide rail 42, and includes an electric check block 56 as shown in FIGS.

  The electric check block 56 includes a long chain 56a, a block main body 56b that houses a chain drum capable of winding and unwinding the chain 56a, and a motor 56c for rotating the chain drum (FIG. 6). ). The block body 56b is suspended from the bracket 50 via a hook 57B. A hook 57A is fixed to the tip of the chain 56a, and the hook 57A is hooked on the held portion 36. The winding of the chain 56a by the block body 56b pulls up the entire nozzle unit 30A (30B) including the held portion 36 against its own weight. Conversely, the unwinding of the chain 56a by the block main body 56b allows a drop due to the weight of the nozzle unit 30A (30B).

  The horizontal driving device 48 is for horizontally moving the vertical guide rail 42 along the horizontal guide rails 43 and 44. As means for this purpose, a lifting drive motor 58 as a drive source and a drive transmission mechanism (not shown) are provided, and these are assembled to the bracket 50. The drive transmission mechanism rotates the roller 52 to run along the lateral guide rail 43 by transmitting the output of the lifting drive motor 56 to a specific roller 52 among the rollers 52.

  A water supply device 60 as shown in FIG. 11 is connected to the nozzles 32 of the nozzle units 30A and 30B. The water supply device 60 supplies cleaning water to the nozzles 32 and injects the cleaning water. A tank 62 for storing cleaning water, a pump unit 64 for pumping the cleaning water in the tank 62, A pipe 66 connecting the pump unit 64 and each nozzle 32 and an appropriate valve are provided. The pipe 66 has a flexible portion for following the movement of the nozzle units 40A and 40B.

  Next, a method for regenerating each of the dust removal filters 26A and 26B using this filter regeneration device will be described.

  First, each nozzle unit 30A, 30B is transferred to an initial position by the operation of each nozzle transfer device 40A, 40B. In the example shown in FIG. 12, each initial position is a position corresponding to the filter unit 22 at the upper right end as viewed from the upstream side (the upper left end as viewed from the downstream side).

  Of the nozzle units 30A and 30B in the initial position, first, water supply from the water supply device 60 is started to the upstream nozzle unit, that is, the first nozzle unit 30A. In this water supply, washing water is simultaneously ejected from the plurality of nozzles 32 of the first nozzle unit 30A. The sprayed cleaning water hits the dust removal filter of the filter unit 22 facing the first nozzle unit 30A. In parallel with this jetting, the nozzle transfer device 40A performs a downward scanning that lowers the nozzle unit 30A along the column of the filter units 22 (that is, along the vertical guide rail 42). Accordingly, the cleaning process is sequentially performed on the filter units 22 in the right end row in FIG. 12 from the top.

  In this embodiment, the simultaneous injection of the cleaning water from the plurality of nozzles 32 provided in each nozzle unit 30A, 30B enables simultaneous supply of the cleaning water to the entire width direction of the filter unit 22 and increases the cleaning efficiency. . Further, since the injection regions 38 of the nozzles 32 overlap with each other when viewed from above, the cleaning regions are continuous in the horizontal direction, and the continuity of the filter can be achieved without unevenness. In addition, since the jetting surfaces of the nozzles 32 are inclined so that the cleaning water does not actually interfere with each other in the region 38a where the jetting regions 38 overlap with each other, energy loss due to the interference is prevented and high cleaning efficiency is achieved. Is secured.

  The nozzle units 30A and 30B for injecting the cleaning water may be lighter than, for example, a blower for regenerating the filter air, and there is no hindrance to the transfer. Moreover, spraying of the cleaning water on the cleaning water filter exhibits a regenerative effect that is remarkably higher than that of air regeneration, as shown in a later embodiment.

  In order to effectively wash the dust removal filters 26A and 26B of each filter unit 22, it is preferable that the washing water hits the upper surface of the filter. The washing water that hits the upper surface of the filter wash away dust and the like adhering to the filter, and flows down from the filter as dirty water.

In this embodiment, since the first dust removal filter 26A is inclined such that the upper surface of the first dust removal filter 26A faces the upstream side of the dust removal filters 26A, 26B, the first dust removal filter 26A, 26B is inclined. The cleaning water sprayed by the nozzle unit 30A hits the upper surface of the first dust removal filter 26A. Therefore, the washing water jet from the first nozzle unit 30A effectively acts on the washing of the first dust removal filter 26A.

  The water that contributed to the washing flows down as dirty water from the filter to be washed. Therefore, in order to prevent the water that has flowed down from contaminating the filter that has already been cleaned, it is desirable to proceed with the cleaning process in order from the upper filter unit 22. In this respect, the downward scanning of the nozzle unit 30A as described above is extremely effective in increasing the cleaning efficiency.

  When the first nozzle unit 30A reaches the lower end by such downward scanning, the cleaning process from the upstream side of the filter unit 22 in the right end row is completed. At this time, the injection from the first nozzle unit 30A is temporarily stopped, and the first nozzle unit 30A is pulled up to the upper end position. That is, it is forwarded to the initial position. In the meantime, the water supply to the second nozzle unit 30B and the downward scanning of the second nozzle unit 30B are started. Thereby, the cleaning process from the downstream side of the filter unit 22 in the same row (the leftmost row when viewed from the second nozzle unit 30B side) as the row cleaned by the first nozzle unit 30A is also sequentially performed from the top. Done. The washing water sprayed from the second nozzle unit 30B then hits the upper surface of the second dust removal filter 26B that is inclined so that the upper surface faces the downstream side. Accordingly, the washing water jet from the second nozzle unit 30B effectively cleans the second dust removal filter 26B.

  On the other hand, when the first nozzle unit 30A returns to the upper end position, the first nozzle unit 30A is moved in the horizontal direction (left side in the figure) together with the vertical guide rail 42 by the driving of the horizontal driving device 48, and the cleaning process is completed. Is positioned in the column immediately to the left of the selected column. When the second nozzle unit 30B completes the row cleaning process (that is, when the second nozzle unit 30B reaches the lower end position), the water supply to the first nozzle unit 30A and the The downward scanning of the unit 30A is resumed, and the cleaning process for the filter units 22 in the second row from the right is performed in order from the top.

  Hereinafter, in the same manner, in order from the right end column of the filter unit 22, the washing water is jetted from the upstream side by the first nozzle unit 30A and the washing water is jetted from the downstream side by the second nozzle unit 30B. Are performed alternately. Thus, finally, the cleaning process for the dust removal filters 26A and 26B of all the filter units 22 is completed without the attachment or detachment or movement of the filter units 22.

  It is preferable that the interval from the end of the injection by the first nozzle unit 30A to the start of the injection by the second nozzle unit 30B is short. When this interval is long, there is a risk that dirty water flowing down by the cleaning by the second nozzle unit 30B may contaminate the first dust removal filter 26A that has been cleaned.

  From this point of view, the cleaning processing by the second nozzle unit 30B may be started for the same row before the cleaning processing of the predetermined row by the first nozzle unit 30A is not completed. In other words, there may be a period in which the injection by the first nozzle unit 30A and the injection by the second nozzle unit 30B are performed simultaneously. In such a period, it is preferable to sufficiently shift the positions of the nozzle units 30A and 30B so that the cleaning water sprayed from both the nozzle units 30A and 30B does not interfere with each other.

When the regeneration process as described above is not performed, it is preferable that the nozzle units 30A and 30B are retracted to a position outside the arrangement area of the filter unit 22 so as not to obstruct ventilation. In the system shown in FIG. 4, a retreat space for retreating the nozzle units 30A and 30B and the vertical guide rail 42 is secured on the right side of the filter unit arrangement region.

  The reproduction method according to the present invention is not limited to the method for completing the cleaning process for each column by downward scanning as described above. For example, the cleaning process may be performed for each row by horizontal scanning. Even in this case, it is desirable that the cleaning is performed from the upper filter unit.

  The specific configuration of the nozzle transfer device is not particularly limited. However, the nozzle transfer devices 40A and 40B according to the above-described embodiment are advantageous for the downward scanning type reproduction process as described above. When performing such downward scanning, the movements of the nozzle units 30A and 30B are more frequently raised and lowered than the horizontal movement. Accordingly, the nozzle units 30A and 30B are lifted and lowered independently by the nozzle units 30A and 30B as in the above-described device, and the nozzle units 30A and 30B and the long vertical guide rail 42 are integrally moved only in the horizontal direction. This saves energy required for transferring the nozzle units 30A and 30B.

  Conversely, when the nozzle unit is horizontally scanned, the horizontal guide rail directly holds the nozzle unit so as to be horizontally movable, and an elevating support member that supports the horizontal guide rail and the nozzle unit so as to be movable up and down integrally. The provided device is advantageous in terms of energy saving.

  The filter regeneration device according to the present invention is not limited to the one in which the nozzle unit and the nozzle transfer device are provided on both the upstream side and the downstream side of the ventilation gas purification device. For example, in the case where there is a single dust removing filter included in each filter unit and all the filters are arranged so as to incline only on either the upstream side or the downstream side, the filter is disposed only on the corresponding side. A nozzle unit and a nozzle transfer device may be provided. Moreover, when the filter is stretched along the vertical plane, the washing water is more effectively jetted from the upstream side.

(Comparison with air regeneration)
The water jet cleaning (hereinafter referred to as WJ cleaning) by jetting cleaning water according to the present invention is different from the air regeneration method, that is, the method of pumping cleaning air to the filter unit, and the clogging progress speed of the filter after regeneration. Has the excellent effect of almost no change from the initial.

  FIG. 13 is a graph showing the relationship between the number of elapsed days and the number of regenerations when air regeneration is performed. In this air regeneration, as shown in the figure, the period from the end of the first regeneration process until the clogging progresses and the second regeneration process becomes necessary is as long as 7 days. However, as the number of times of reproduction is increased, the clogging progress speed increases and the interval until the next reproduction is shortened, and the reproduction process must be performed every day at the end.

On the other hand, in the regeneration method using WJ cleaning according to the present invention, it was confirmed that the clogging progress speed after the regeneration process does not change no matter how many times the regeneration process is performed.
(Comparison with hand-washing regeneration)
FIGS. 14A to 14E are graphs respectively showing results obtained by measuring the air resistance characteristics of the filter after the regeneration process is performed by the WJ cleaning according to the embodiment every seven days. Specifically, these graphs show the relationship between the air volume of the test air flow and the air resistance when the filter is blown on a test basis, and as a reference example, each filter unit is detached and attached one by one. The characteristics of air resistance after regeneration by hand washing are also shown.

  FIG. 8F summarizes the behavior of air resistance shown in the graphs as the relationship between the elapsed days after the regeneration process and the air resistance.

  Each of the above graphs shows that the characteristics of air resistance after regeneration according to the present invention and the change with time are almost inferior to those of air resistance after hand washing regeneration. This is proof that the regeneration method according to the present invention can achieve a regeneration effect equivalent to hand-wash regeneration that requires removal and attachment of the filter unit without requiring removal or movement of the filter unit.

1 is an overall perspective view of a tunnel ventilation system according to an embodiment of the present invention. It is a schematic perspective view of the ventilation gas purification apparatus which concerns on the said ventilation system for tunnels. It is a side view of the said ventilation gas purification apparatus and the filter regeneration apparatus attached to this. It is a front view of the said ventilation gas purification apparatus and filter regeneration apparatus. It is a top view of the said ventilation gas purification apparatus and filter regeneration apparatus. It is a side view which shows the principal part of the said filter reproduction | regeneration apparatus. It is a front view which shows the principal part of the said filter reproduction | regeneration apparatus. It is the VIII-VIII sectional view taken on the line of FIG. It is an enlarged view of the IX part of FIG. (A) is a top view which shows the injection area | region of each nozzle in the nozzle unit of the said filter reproduction | regeneration apparatus, (b) is the front view. It is a piping diagram of the water supply apparatus contained in the said filter regeneration apparatus. It is a figure which shows the filter reproduction | regeneration procedure by the said filter reproduction | regeneration apparatus. It is a graph which shows a time-dependent change of the frequency of the air regeneration frequency by an air regeneration method. (A)-(e) is a graph which shows the air resistance characteristic of the filter after having regenerated by the regeneration method by the WJ washing | cleaning which concerns on this invention, and the hand-washing regeneration method, (f) is a graph which shows the time-dependent change of the said air resistance. It is.

DESCRIPTION OF SYMBOLS 10 Tunnel 12 Ventilation air path 16 Ventilation gas purification apparatus 17 Blower 20 Exhaust pipe 22 Filter unit 26A 1st dust filter 26B 2nd dust filter 30A Nozzle unit 30B Nozzle unit 32 Nozzle 34 Unit main body 36 Holding part 38 40A 1st nozzle transfer device 40B 2nd nozzle transfer device 42 Vertical guide rail (elevation support member)
43 Lateral guide rail (horizontal support member)
44 Lateral guide rail (horizontal support member)
46 Elevating drive device 48 Horizontal drive device 60 Water supply device θ Inclination angle of spray surface

Claims (8)

A plurality of filter units including a dust removal filter are provided, and these filter units are arranged vertically and horizontally on a plane orthogonal to the ventilation direction in a ventilation air passage communicating with the tunnel, and each filter unit is arranged upstream of the ventilation direction. A first dust removal filter arranged to incline in a direction perpendicular to the ventilation direction so as to face the side, and an inclination in a direction perpendicular to the ventilation direction to incline toward the downstream side of the ventilation direction A method for regenerating each dust removal filter of a tunnel ventilation gas purification apparatus including a second dust removal filter arranged to
A first nozzle unit having a nozzle capable of injecting cleaning water is disposed upstream of the tunnel ventilation gas purification device, and a nozzle capable of injecting cleaning water is disposed downstream of the tunnel ventilation gas purification device. 2 nozzle units are disposed, and the cleaning water is jetted from the nozzles while maintaining a posture in which the nozzles of the first nozzle units are directed to the tunnel ventilation gas purification device. The cleaning water is sprayed from the nozzle while keeping the posture in which the nozzle of the second nozzle unit is directed to the tunnel ventilation gas purification device while being applied to the upper surface of the dust removal filter. A spraying process applied to the upper surface of the dust removal filter ;
A nozzle transfer step of sequentially changing the dust removal filter to which the cleaning water sprayed from the nozzles hits by translating the nozzle units along the arrangement direction of the filter units,
A filter regeneration method for a tunnel ventilation gas purifying apparatus, wherein the dust removal filters in the respective filter units are sequentially washed by performing both the steps. In the filter regeneration method of the ventilation gas purification apparatus for tunnels of Claim 1,
The method of regenerating a filter for a tunnel ventilation gas purification apparatus, wherein the nozzle transferring step transfers the nozzle unit so that the dust filter is cleaned in order from an upper filter unit. In the filter regeneration method of the ventilation gas purification apparatus for tunnels of Claim 2,
In the injection step, as the nozzle unit, a nozzle unit in which the injection region of the nozzle included in the nozzle unit has a spread over the entire width direction of the dust removal filter in each filter unit,
The method of regenerating a filter for a tunnel ventilation gas purification apparatus, wherein the nozzle transfer step is to lower the nozzle unit from above along each column of the filter units. In the filter regeneration method of the ventilation gas purification apparatus for tunnels in any one of Claims 1-3 ,
The nozzle transfer step includes a period in which the washing water is jetted from the first nozzle unit and the washing water is jetted from the second nozzle unit at the same time. A method of regenerating a filter for a tunnel ventilation gas purification apparatus, wherein the cleaning water is jetted while the positions of both nozzle units are shifted from each other so that water does not interfere with each other. A plurality of filter units including a dust removal filter, and each of the filter units in the ventilation gas purification device for tunnels arranged vertically and horizontally on a plane orthogonal to the ventilation direction in a ventilation air passage communicating with the inside of the tunnel. An apparatus for regenerating a dust removal filter of a filter unit,
A nozzle unit having a nozzle capable of injecting cleaning water, and disposed on at least one of the upstream side and the downstream side of the tunnel ventilation gas purification device;
A water supply device for supplying cleaning water to the nozzle unit and injecting the cleaning water from the nozzle;
The nozzle unit is held in a posture in which the nozzle is directed to the tunnel ventilation gas purification device, and the nozzle of the nozzle unit is moved in parallel along the arrangement direction of the filter units. A unit transfer device for changing the filter unit oriented,
Each of the filter units includes a first dust removal filter that is inclined so as to face the upstream side in the ventilation direction, and a second dust removal filter that is inclined so as to face the downstream side in the ventilation direction. ,
The nozzle unit includes a first nozzle unit disposed on the upstream side of the tunnel ventilation gas purification device, and a second nozzle unit disposed on the downstream side of the tunnel ventilation gas purification device,
As the nozzle transfer device, a first nozzle transfer device that translates the first nozzle unit in a posture in which cleaning water sprayed from the nozzles of the first nozzle unit hits the upper surface of the first dust removal filter; And a second nozzle transfer device that translates the second nozzle unit in such a posture that the cleaning water sprayed from the nozzle of the second nozzle unit hits the upper surface of the second dust removal filter. Filter regenerator for tunnel ventilation gas purifier. A plurality of filter units including a dust removal filter, and each of the filter units in the ventilation gas purification device for tunnels arranged vertically and horizontally on a plane orthogonal to the ventilation direction in a ventilation air passage communicating with the inside of the tunnel. An apparatus for regenerating a dust removal filter of a filter unit,
A nozzle unit having a nozzle capable of injecting cleaning water, and disposed on at least one of the upstream side and the downstream side of the tunnel ventilation gas purification device;
A water supply device for supplying cleaning water to the nozzle unit and injecting the cleaning water from the nozzle;
The nozzle unit is held in a posture in which the nozzle is directed to the tunnel ventilation gas purification device, and the nozzle of the nozzle unit is moved in parallel along the arrangement direction of the filter units. A unit transfer device for changing the filter unit oriented,
The nozzle unit includes a plurality of nozzles arranged in a specific direction, and these nozzles, in which the ejection region of the nozzles included in the nozzle unit has a wide area across the entire width direction of the dust removal filter in each filter unit. Having a unit body
The water supply device is for injecting cleaning water from the nozzles simultaneously,
The nozzle transfer device is configured to translate the entire nozzle unit while holding the unit body of the nozzle unit in a posture in which the nozzles of the nozzle unit are arranged in a horizontal direction.
Each nozzle of the nozzle unit performs wide-angle injection on a specific injection surface that spreads in the lateral direction, and is disposed at a position where the injection regions of nozzles adjacent to each other overlap each other when viewed from above. A filter regenerator of a tunnel ventilation gas purification apparatus, wherein an injection surface of each nozzle is inclined with respect to a horizontal direction so that interference between actual wash waters in the region is avoided. In the filter regeneration apparatus of the ventilation gas purification apparatus for tunnels of Claim 6 ,
The nozzle transfer device is
An elevating support member for supporting the nozzle unit so as to elevate;
A lifting drive device that lifts and lowers the nozzle unit along the lifting support member;
A horizontal support member for supporting the elevating support member so that the elevating support member is movable in a horizontal direction along the arrangement surface of the filter units;
A horizontal driving device that integrally moves the elevating support member and the nozzle unit supported by the elevating support member along the horizontal support member in a horizontal direction;
A filter regeneration device for a ventilation gas purification device for tunnels. A tunnel ventilation system for ventilating gas in a tunnel,
A ventilation path leading into the tunnel;
A blower that forms a flow of gas from the tunnel side to the exhaust side in the ventilation air passage;
A plurality of filter units including dust removal filters, and these filter units are arranged vertically and horizontally on a plane orthogonal to the ventilation direction in the ventilation air passage,
A filter regeneration device for a tunnel ventilation gas purification device according to any one of claims 5 to 7 for regeneration of the tunnel ventilation gas purification device,
In the ventilation air passage, the nozzle unit of the filter regeneration device is retracted to a position that is out of the arrangement area of each filter unit of the tunnel ventilation ventilation gas purification device when the tunnel ventilation gas purification device is used. A ventilation system for tunnels, which has a retreat space for it.

Images