JP2014195759A - Filter washing device and filter washing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively wash a filter in which a plurality of filter mediums having different fiber intervals are stacked so as to capture very small powder dust.SOLUTION: Cleaning liquid 22 is caused to stay in meshes 42 and 32 of an exhaust side filter medium 40 in which fibers 41 are thin and arranged at narrow intervals and that captures foreign matters 63 and 64 and an intake side filter medium 30 in which fibers 31 are thick and arranged at wide intervals and that captures foreign matters 61 and 62. The fibers 41 and 31 are immersed in the liquid 22 to release the foreign matters 61, 62, 63, and 64 from the fibers 41 and 31. Thereafter, high pressure gas 23 is used to discharge the cleaning liquid 22 and the respective foreign matters 61, 62, 63, and 64 stayed among the meshes 42 and 32 from the filter mediums 40 and 30.

Description

  The present invention relates to a structure of a filter cleaning device and a filter cleaning method, and more particularly, to a filter cleaning device provided in an air conditioner and the like, and a filter cleaning method using the filter cleaning device.

  In general, a filter is attached to an air intake port of a building air conditioner or the like to collect foreign matter such as dust in the air sucked by the air conditioner or the like and filter the air. This filter removes foreign matter by removing or replacing or cleaning the filter from the air intake at regular intervals, because foreign matter such as dust adheres to the filter surface due to use and the filter's ability to filter air is reduced. Has been done.

  The filter is washed by, for example, water washing with a high-pressure jetter, vacuum suction, sifting (striking) using a vibrator, scraping with a brush, etc., or a combination thereof. There is a problem that work efficiency is low because it is often performed. For this reason, various methods for automatically cleaning the filter have been proposed.

  Patent Document 1 relates to a filter cleaning device, and a plurality of air injection nozzles for injecting high-pressure air are provided on a transfer path of a filter transferred by a transfer conveyor, and high-pressure water is provided downstream of the air injection nozzle in the transfer direction of the filter. A plurality of gas-liquid injection nozzles for injecting high-pressure air are provided. After the filter is washed by colliding high-pressure air injected from the air-injection nozzle with the filter, high-pressure water and high-pressure air injected from the gas-liquid injection nozzle collide with each other. A cleaning device for washing the filter with water has been proposed.

  Patent Document 2 relates to a cleaning method for a filter in which a filter medium is folded so that V-shaped peaks and valleys are repeatedly continuous. When cleaning liquid and gas are injected from above, the cleaning liquid and gas pressure are applied to the filter medium. In order to solve the problem that the cleaning liquid and gas do not easily penetrate through the filter medium without acting in the thickness direction, the cleaning liquid and gas are jetted at a slow flow rate to the central part of the filter medium, and the cleaning liquid and gas are sprayed to the peripheral part at a high flow rate. Injecting and cleaning liquid in the peripheral part, cleaning liquid injected into the central part by gas, suppressing the gas from flowing out without passing through the filter medium, increasing the pressure of the cleaning liquid and gas in the thickness direction of the filter medium, and more There has been proposed a method for effectively cleaning the gas so that a large amount of the cleaning liquid and gas pass through the filter medium.

  The conventional filter cleaning methods described in Patent Document 1 and Patent Document 2 both inject high-pressure water or gas into the filter, and remove foreign matter collected in the filter by the fluid force of water or gas. To be discharged.

JP-A-9-122425 JP 2010-12374 A

  By the way, in recent years, many high-performance filters capable of collecting minute dust of about several μm have been used. Such a high-performance filter is, for example, a fine nonwoven fabric of 10 to 20 μm on a dry nonwoven fabric in which 20 to 50 μm of polyester or vinylon fiber is entangled in a network and immersed in a rubber resin or acrylic resin to fix the fiber. A non-woven fabric for fine dust, in which fibers are entangled in a mesh at fine intervals, is laminated and fixed with an adhesive or the like.

  The dry nonwoven fabric is arranged on the air inflow side, collects foreign matters such as dust of 100 to several hundred μm larger than the distance of the fibers of the dry nonwoven fabric on the surface, and between the fibers inside the dry nonwoven fabric. In this case, foreign matter of about several tens of μm is collected. On the other hand, the fine dust non-woven fabric is arranged on the air outflow side, and has a narrower fiber interval than the dry non-woven fabric, and collects fine dust of about several μm between the fibers or on the fiber surface. The adhesive surface between the dry nonwoven fabric and the fine dust nonwoven fabric has a reduced cross-sectional area through which water and other fluids pass by the area of the adhesive, etc., so the nonwoven fabric for fine dust is laminated and fixed to the dry nonwoven fabric with an adhesive, etc. The high-performance filter has a problem that even if water is injected at a high pressure, the water does not easily penetrate the entire filter, and it is difficult to discharge foreign matter by the fluid force of water. Further, even if high-pressure gas is passed through, since the gas has a small specific gravity and a small fluid force, there is a problem that it is difficult to sufficiently discharge large foreign matter collected inside the dry nonwoven fabric or on the air inflow side.

  Furthermore, even if a fluid such as gas or water is passed through the nonwoven fabric for fine dust, a large fluid force does not act on the foreign matter adhering to the surface of the fiber of the fine dust nonwoven fabric. It was difficult to discharge foreign matter. For this reason, the conventional cleaning methods described in Patent Documents 1 and 2 have a problem that it is difficult to clean a high performance filter in which a nonwoven fabric for fine dust is laminated and fixed on a dry nonwoven fabric.

  Then, an object of this invention is to wash | clean effectively the filter which laminated | stacked the several filter medium from which the space | interval of a fiber differs so that micro dust can be collected.

  The filter cleaning apparatus according to the present invention includes a first filter medium in which first fibers are entangled in a mesh pattern at a first interval, and a second fiber that is thinner than the first fiber than the first interval. A second filter medium entangled in a mesh at a fine second interval is stacked, the first filter medium collects the first foreign matter, and the second filter medium is smaller than the first foreign matter. A filter cleaning device for cleaning the filter that collects the second foreign matter, spraying a cleaning liquid onto the first filter medium, and discharging a part of the first foreign matter from the first filter medium, A cleaning liquid injection nozzle for immersing the first fiber of the first filter medium in a cleaning liquid and peeling off the remaining portion of the first foreign matter that has not been discharged from the first filter medium from the first fiber; and the second filter Spraying the cleaning liquid on the filter medium, immersing the second fiber of the second filter medium in the cleaning liquid, and A cleaning liquid spray nozzle for peeling the second foreign matter from the second fiber of the filter medium, a cleaning liquid spraying high-pressure gas onto the filter, and soaking the first fiber and the second fiber, and the first A high-pressure gas injection nozzle for extruding the remaining portion of the first foreign matter and the second foreign matter peeled from one fiber and the second fiber to the outside of the filter.

  In the filter cleaning apparatus of the present invention, the cleaning apparatus includes a filter transport unit that transports the filter, and the cleaning liquid spray nozzle, the cleaning liquid spray nozzle, and the high-pressure gas spray nozzle are arranged along the filter transport direction, the cleaning liquid spray nozzle, It is also preferable that the cleaning liquid injection nozzle and the high-pressure gas injection nozzle are arranged in this order, and the cleaning liquid injection nozzle is arranged below the filter, and the cleaning liquid spray nozzle and the high-pressure gas injection nozzle Is preferably disposed on the upper side of the filter, and the cleaning liquid spray nozzle, the cleaning liquid spray nozzle, and the high-pressure gas spray nozzle are provided in a plurality of sets as a set of continuous devices, It is also suitable.

  Further, in the filter cleaning device of the present invention, a hollow casing that is supplied with high-pressure gas and moves in a direction intersecting with the direction in which the filter is conveyed, and m rows × n columns on the surface of the hollow casing facing the filter It is also preferable to include a high-pressure gas injection nozzle group including the high-pressure gas injection nozzles having a diameter of 0.3 mm to 2 mm.

  In the filter cleaning method of the present invention, the first filter medium in which the first fibers are entangled in a mesh pattern at the first intervals, and the second fibers that are thinner than the first fibers are more than the first intervals. A second filter medium entangled in a mesh at a fine second interval is stacked, the first filter medium collects the first foreign matter, and the second filter medium is smaller than the first foreign matter. A filter cleaning method for cleaning a filter that collects second foreign matters, wherein a cleaning liquid is sprayed on the second filter medium, and the second fibers of the second filter medium are immersed in the cleaning liquid, and the second filter medium is cleaned. A first step of separating the second foreign matter from the second fiber of the filter medium, and a cleaning liquid is sprayed onto the first filter medium, and a part of the first foreign matter is discharged from the first filter medium. In addition, the first filter medium was not discharged from the first filter medium by immersing the first fiber of the first filter medium in a cleaning solution. A second step of peeling the remainder of the first foreign matter from the first fiber, a high-pressure gas sprayed on the filter, and a cleaning liquid soaking the first fiber and the second fiber; And a third step of pushing out the remaining part of the first foreign matter and the second foreign matter peeled from one fiber and the second fiber to the outside of the filter.

  In the filter cleaning method of the present invention, the first step, the second step, and the third step are preferably repeated a plurality of times as a set of continuous steps, In the first step, the cleaning liquid is sprayed on the filter from the upper side of the filter, in the second step, the cleaning liquid is sprayed on the filter from the lower side of the filter, and in the third step, the filter is It is also preferable to inject high pressure gas into the filter from above.

  The present invention has an effect of effectively cleaning a filter in which a plurality of filter media having different fiber intervals are stacked so as to collect minute dust.

It is a systematic diagram which shows the structure of the filter washing | cleaning apparatus in embodiment of this invention. It is sectional drawing which shows the AA cross section of the filter cleaning apparatus shown in FIG. It is a perspective view of the filter which the filter washing | cleaning apparatus of this embodiment makes the object of washing | cleaning. It is explanatory drawing which shows the detail of the A section of FIG. It is explanatory drawing which shows the 1st process of the filter washing | cleaning method of this embodiment. It is explanatory drawing which shows the 2nd process of the filter cleaning method of this embodiment. It is explanatory drawing which shows the state of the filter at the time of completion | finish of the 2nd process of the filter washing | cleaning method of this embodiment. It is explanatory drawing which shows the detail of FIG. It is explanatory drawing which shows the 3rd process of the filter cleaning method of this embodiment. It is a perspective view which shows the structure of the high pressure gas injection nozzle group of the filter washing | cleaning apparatus in other this embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the filter cleaning device 1 of the present embodiment is installed in a casing 19, and includes a conveyor 3 that is a filter conveying means for transferring the filter 2, and an upper side of the filter 2 on the conveying surface of the conveyor 3. A cleaning liquid spray nozzle group 4a composed of a plurality of cleaning liquid spray nozzles 24a for spraying the cleaning liquid, and a cleaning liquid sprayed from the lower side of the filter 2 on the transport surface of the conveyor 3 is arranged downstream of the cleaning liquid spray nozzle group 4a in the filter transport direction. A cleaning liquid injection nozzle group 4b composed of a plurality of cleaning liquid injection nozzles 24b, and a high pressure gas injection nozzle group 5 composed of a plurality of high pressure gas injection nozzles 25 that inject high pressure gas downstream of the cleaning liquid injection nozzle group 4b in the filter transport direction, It has. The cleaning liquid spray nozzle group 4 a, the cleaning liquid injection nozzle group 4 b, and the high pressure gas injection nozzle group 5 constitute a set of continuous devices that clean the filter 2. In this embodiment, three sets of the cleaning liquid spray nozzle group 4 a, the cleaning liquid injection nozzle group 4 b, and the high pressure gas injection nozzle group 5 are arranged along the conveyance direction of the filter 2.

  As shown in FIG. 2, the upper cleaning liquid spray nozzle group 4a and the lower cleaning liquid spray nozzle group 4b are each composed of a plurality of cleaning liquid spray nozzles 24a and cleaning liquid spray nozzles 24b arranged in a straight line. The cleaning liquid is sprayed substantially uniformly over the entire width direction of the. Similarly, the high-pressure gas injection nozzle group 5 is composed of a plurality of high-pressure gas injection nozzles 25 arranged in a straight line, and injects the high-pressure gas substantially uniformly over the entire width direction of the filter 2. In the present embodiment, the cleaning liquid spray nozzle group 4a and the cleaning liquid spray nozzle group 4b are each configured with seven cleaning liquid spray nozzles 24a and cleaning liquid spray nozzles 24b, but the number is not limited thereto.

  As shown in FIG. 1, the conveyor 3 includes a belt conveyor including left and right rollers 6 a and 6 b and a belt 7, and a plurality of roller conveyors 8. The filter 2 is conveyed in the direction of arrow B in FIG. As shown in FIG. 1, the belt 7 of the belt conveyor is moved by rotating a roller shaft 9 by a belt drive motor (not shown), and the roller conveyor 8 is rotated by the movement of the belt 7, and the roller conveyor 8 is rotated. Thus, the filter 2 is conveyed in the direction of arrow B. The roller conveyor 8 may be omitted, and the filter 2 to be conveyed may be mounted on the belt 7 and conveyed. In this case, the belt 7 is preferably provided with a plurality of holes through which the cleaning liquid and high-pressure gas flow out.

  As shown in FIG. 1, the cleaning liquid 22 is supplied from the cleaning liquid tank 10 through the cleaning liquid supply pipe 12 to the cleaning liquid spray nozzle group 4 a and the cleaning liquid injection nozzle group 4 b of the filter cleaning apparatus 1. As shown in FIG. 2, the supply amount of the cleaning liquid 22 is controlled by the spray liquid control device 18 provided in the cleaning liquid spray nozzle group 4a and the cleaning liquid spray nozzle group 4b, and an appropriate amount of the cleaning liquid 22 is supplied. Similarly, the high pressure gas injection nozzle group 5 of the filter cleaning device 1 is supplied with the high pressure gas 23 from the high pressure gas tank 13 through the high pressure gas supply pipe 14. The supply amount of the high-pressure gas 23 is controlled by a high-pressure gas control device (not shown) provided in the high-pressure gas injection nozzle group 5, and an appropriate amount of the high-pressure gas 23 is supplied.

  The cleaning liquid spray nozzle group 4a and the high-pressure gas injection nozzle group 5 are attached to a lifting device 15 that moves up and down in the direction C shown in FIG. . That is, the thickness d in the vertical direction of the transferred filter 2 is in the range of about 10 mm to about 500 mm. The cleaning liquid spray nozzle group 4a and the high-pressure gas spray nozzle group 5 are moved up and down so as to spray. The lifting device 15 is provided with a ball screw (not shown) and is lifted and lowered in the C direction by a servo motor (not shown), but may be lifted and lowered by another method, for example, a lock cylinder.

  Next, the filter 2 to be cleaned by the filter cleaning apparatus of the present embodiment will be described with reference to FIGS. The filter 2 has a filter frame 20 shown in FIG. 3 attached in a metal frame (not shown). As shown in FIG. 3, the filter medium 20 of the filter 2 includes an intake side filter medium 30 (first filter medium) on which air is sucked into the filter 2 and an exhaust side filter medium on the exhaust side from which air is discharged from the filter 2. 40 (second filter medium) is laminated and fixed with an adhesive 50.

  The suction-side filter medium 30 as the first filter medium is a dry nonwoven fabric in which fibers 31 such as polyester or vinylon having a diameter of 20 to 50 μm are entangled in a mesh shape and immersed in a rubber resin or an acrylic resin to fix the fibers. The distance between the fibers 31 (first fibers) (first distance) or the size of the eyes 32 (the space between the fibers 31) of the suction side filter medium 30 is 40 to 50 μm. Is often used. As shown in FIG. 3, the suction-side filter medium 30 captures foreign matter 61 such as dust of 100 to several hundred μm larger than the first interval of the fibers 31 constituting the intake-side filter medium 30 on the intake-side surface. The foreign matter 62 of about several tens of μm is collected between the fibers 31 inside. The foreign matter 61 and the foreign matter 62 collected by the suction side filter medium 30 which is the first filter medium are the first foreign substances.

  The exhaust-side filter medium 40, which is the second filter medium, is a nonwoven fabric in which, for example, ultrafine fibers 41 (second fibers) made of polypropylene of about 10 μm are entangled in a mesh shape. The interval between the fibers 41 (second fibers) (second interval) or the size of the eyes 42 of the exhaust-side filter medium 40 (the space between the fibers 41 and 41) is 5 to 10 μm. It is often used. The interval between the fibers 41 (second interval) is narrower than the interval between the fibers 31 of the intake-side filter medium 30 (first interval). As shown in FIG. 3, the exhaust-side filter medium 40 collects the foreign matter 63 that is fine dust of about several μm between the fibers 41, or the fine dust foreign matter 64 of the fibers 41 as shown in FIG. 4. Or collected on the surface. The foreign matter 63 and the foreign matter 64 collected by the exhaust-side filter medium 40, which is the second filter medium, are second foreign substances.

  As shown in FIG. 3, the suction-side filter medium 30 and the exhaust-side filter medium 40 are, for example, dispersed by adhering an adhesive 50 such as low melting point EVA resin powder between the filter media 30 and 40, and being laminated and fixed. ing. Lamination fixation may be performed by heat-welding the filter medium at the adhesion point portion by ultrasonic waves. The adhesive 50 or the heat welding part is scattered on the joint surface of each filter medium 30 and 40, and makes an aeration cross-sectional area small. Therefore, the smallest cross-sectional area of the air in the filter medium 20 is the bonding surface between the suction-side filter medium 30 and the exhaust-side filter medium 40 where the adhesive 50 or the joint exists.

  Next, a method for cleaning the filter 2 by the filter cleaning apparatus 1 of the present embodiment described with reference to FIGS. 1 and 2 will be described with reference to FIGS. 5, 6, and 9 are diagrams schematically showing a first process, a second process, and a third process for cleaning the filter medium 20 of the filter 2.

  As shown in FIG. 5, the filter 2 is placed on the conveyor 3 shown in FIG. 1 so that the exhaust-side filter medium 40 is on the upper side and the intake-side filter medium 30 is on the lower side. The conveyor 3 conveys the filter 2 into the casing 19. Then, as shown in FIG. 5, the cleaning liquid 22 is sprayed from above the exhaust-side filter medium 40 from the cleaning liquid spray nozzles 24a of the cleaning liquid spray nozzle group 4a arranged on the upper side of the filter 2 (exhaust-side filter medium 40 side). The As shown in FIG. 5, the sprayed cleaning liquid 22 becomes mist-like fine water droplets and hits the surface of the exhaust-side filter medium 40, and has 5 to 10 μm eyes 42 (fiber 41) between the fibers 41 of the exhaust-side filter medium 40. And the inside of the exhaust-side filter medium 40. On the other hand, the air that has entered the eyes 42 of the exhaust-side filter medium 40 is pushed downward, passes through the joint surface with the intake-side filter medium 30, and is discharged from the surface of the intake-side filter medium 30 to the outside. As a result, the cleaning liquid 22 that has penetrated into the exhaust-side filter medium 40 enters between the fibers 41 of the exhaust-side filter medium 40 and immerses the fibers 41, as shown by the hatching between the fibers 41 in FIG.

  The air that has entered the exhaust-side filter medium 40 is discharged from the intake-side filter medium 30 to the outside, but the cleaning liquid 22 is separated from the intake-side filter medium 30 in which the adhesive 50 is scattered to reduce the fluid cross-sectional area. It hardly penetrates into the inside of the suction side filter medium 30 beyond the joint surface. For this reason, the joint surface of the exhaust-side filter medium 40 and the intake-side filter medium 30 is in a state like the bottom of the container, and the cleaning liquid 22 that has penetrated into the exhaust-side filter medium 40 does not fall down and enters the exhaust-side filter medium 40. The state is stored and the fiber 41 is immersed.

  While spraying the cleaning liquid 22, the conveyor 3 slowly transports the filter 2 in the transport direction indicated by arrow B in FIG. 1, so that the exhaust-side filter medium 40 of the filter 2 gradually moves from the front end side in the transport direction. When the filter 2 is immersed in the cleaning liquid 22 and the entire length of the filter 2 passes through the cleaning liquid spray nozzle group 4a, the fibers 41 of the exhaust-side filter medium 40 as a whole are immersed in the cleaning liquid 22 (first step).

  When the filter 2 in which the fibers 41 of the exhaust-side filter medium 40 are immersed in the cleaning liquid 22 is conveyed by the conveyor 3 and comes over the cleaning liquid injection nozzle group 4b, as shown in FIG. The cleaning liquid 22 is jetted from the cleaning liquid jet nozzles 24b of the cleaning liquid jet nozzle group 4b arranged on the (intake side filter medium 30 side) toward the lower side of the suction side filter medium 30. The injected cleaning liquid 22 hits the surface of the intake-side filter medium 30 as water droplets, and blows away foreign matter 61 such as dust of 100 to several hundred μm collected on the surface of the intake-side filter medium 30. When the foreign matter 61 on the surface is blown off, the cleaning liquid 22 sprayed from the cleaning liquid spray nozzle 24b has 40 to 50 μm eyes 32 (fibers) between the fibers 31 of the suction side filter medium 30 by water pressure, as shown by hatching in FIG. 31). Since the fibers 41 of the exhaust-side filter medium 40 on the upper side of the intake-side filter medium 30 are immersed in the cleaning liquid 22, the air that has entered the eyes 32 between the fibers 31 flows into the upper exhaust-side filter medium 40. It cannot escape to the outside through, escapes in the lateral direction toward the region where the cleaning liquid 22 of the suction side filter medium 30 is not sprayed, and is discharged to the outside from the surface of that region. As a result, the air that has entered the eyes 32 between the fibers 31 of the suction-side filter medium 30 is replaced by the cleaning liquid 22. The foreign matter 61 adhering to the surface (a part of the foreign matter collected by the suction side filter medium 30) is blown off by the water droplets jetted from the cleaning liquid jet nozzle 24b and discharged from the suction side filter medium 30. The foreign matter 62 collected in the meantime is not blown away by the fluid force of the jetted water droplets, and remains in the intake side filter medium 30. The foreign matter 62 is the remaining portion that has not been discharged in the second step among the foreign matter collected by the suction side filter medium 30.

  Since the cleaning liquid 22 that has entered the eye 32 between the fibers 31 of the suction-side filter medium 30 is held between the fibers 31 by the surface tension between the fibers 41, the cleaning liquid 22 is located below the intake-side filter medium 30. Will not fall. For this reason, the cleaning liquid 22 that has entered the eye 32 between the fibers 31 is stored inside the suction-side filter medium 30 and maintains a state in which the fibers 31 are immersed (second step).

  Then, when the filter 2 passes the position of the cleaning liquid injection nozzle group 4b and the second step is completed, both the exhaust-side filter medium 40 and the intake-side filter medium 30 are arranged between the fibers 41 and 31 as shown in FIG. The cleaning liquid 22 is stored in 42 and 32, and the fibers 41 and 31 are both immersed in the cleaning liquid 22.

  As shown in FIG. 8, when the fiber 41 is immersed in the cleaning liquid 22, the foreign matter 64 collected on the surface of the fiber 41 is peeled off from the surface of the fiber 41 by the cleaning liquid 22, and the eyes between the fibers 41 are removed. It becomes a floating state in the cleaning liquid 22 staying in 42. Similarly, the foreign matter 63 and the foreign matter 62 collected between the fibers 41 and between the fibers 31 are also separated from the fibers 41 and 31 and float in the cleaning liquid 22.

  In this way, the filter 2 is transported to the position of the high-pressure gas injection nozzle group 5 by the conveyor 3 in a state where the foreign substances 62, 63, 64 are floating in the cleaning liquid 22. Then, high-pressure gas 23 (air) is injected toward the surface of the exhaust-side filter medium 40 from each high-pressure gas injection nozzle 25 of the high-pressure gas injection nozzle group 5 arranged on the upper side of the filter 2 (exhaust-side filter medium 40 side). The The jetted high-pressure gas 23 (air) enters the eyes 42 of the fibers 41 of the exhaust-side filter medium 40 by the pressure, and the cleaning liquid 22 staying in the eyes 42 and the foreign matter 63 floating in the cleaning liquid 22. , 64 is pushed downward (to the suction side filter medium 30 side). When the pressure by the high-pressure gas 23 becomes larger than the surface tension between the fibers 41 and 31 retaining the cleaning liquid 22 in the eyes 42 and 32 between the fibers 41 and 31 and the cleaning liquid 22, the cleaning liquid 22 , 31 move downward from the gap between the fibers 41 and 31 and stay in the eyes 42 and 32 between the fibers 41 and 31 together with the foreign substances 62, 63 and 64 from the surface of the suction-side filter medium 30. It is discharged (third process).

  In this way, the filter 2 is transported by the conveyor 3, the cleaning liquid spray nozzle group 4 a disposed above the filter 2, the cleaning liquid spray nozzle group 4 b disposed below the filter 2, and disposed above the filter 2. When the position of the high-pressure gas injection nozzle group 5 is passed, the first cleaning of the filter 2 is completed. Thereafter, the filter 2 passes the position of the next cleaning liquid spray nozzle group 4a, the cleaning liquid spray nozzle group 4b, and the high pressure gas spray nozzle group 5 by the conveyor 3, and the second cleaning is completed. When the cleaning liquid spray nozzle group 4a, the cleaning liquid injection nozzle group 4b, and the high pressure gas injection nozzle group 5 pass again, the third cleaning is finished, and the filter 2 is transported to a dehydration process (not shown).

  As described above, according to the filter cleaning device and the filter cleaning method of the present embodiment, the exhaust-side filter medium 40 that collects the foreign matter 63 and 64 of fine dust, in which the fibers 41 are narrow and the distance between the fibers 41 is narrow, and the fibers 31. The cleaning liquid 22 is retained in the respective eyes 42 and 32 of the suction side filter medium 30 that collects the dust foreign matters 61 and 62 with a large gap between the fibers 31 and the fibers 31 and 31 into the cleaning liquid 22. After immersing and making the foreign matter 62, 63, 64 peel from the fibers 41, 31, the cleaning liquid 22 and the foreign matter 62, 63, 64 staying between the eyes 42, 32 by the high pressure gas 23 are removed. Since the filter media 40 and 30 are discharged, the filter media 20 in which the exhaust-side filter media 40 and the intake-side filter media 30 having different fiber intervals are laminated and fixed by the adhesive 50 can be effectively washed.

  In FIGS. 5 to 7 and FIG. 9, the cleaning liquid 22 and the high-pressure gas 23 have been described as being jetted vertically toward the surface of the filter medium 20. For example, the filter medium 20 has a V-shaped peak and valley. In the case where the cleaning liquid 22 and the high-pressure gas 23 hit the surface of the filter medium 20 at an angle, as in the case of a pleated shape that is continuous, the filter cleaning described in the present embodiment It can be washed by the method. In the present embodiment, the cleaning liquid spray nozzle group 4a, the cleaning liquid injection nozzle group 4b, and the high pressure gas injection nozzle group 5 are described as being passed three times, and cleaning is performed three times. May be more than three times. Furthermore, in this embodiment, the cleaning liquid spray nozzle group 4a, the cleaning liquid injection nozzle group 4b, and the high pressure gas injection nozzle group 5 have a large number of nozzles 24a, 24b, and 25, and the cleaning liquid 22 is almost uniformly in the width direction of the filter 2. Alternatively, the high-pressure gas 23 has been described as being sprayed or sprayed. For example, the number of the nozzles 24 a, 24 b, and 25 is several, and the nozzles 24 a, 24 b, and 25 are moved in the width direction of the filter 2. You may comprise so that the washing | cleaning liquid 22 and the high pressure gas 23 may be spread | diffused or injected substantially uniformly in the width direction of the filter 2. FIG.

  Next, another embodiment of the present invention will be described with reference to FIG. The same parts as those described with reference to FIGS. 1 to 9 are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, as shown in FIG. 10, a high pressure gas injection nozzle group 5 is configured by attaching a pipe 71, which is a high pressure gas injection nozzle, to a hollow housing 70 that can move in the width direction of the filter 2. The configuration is the same as the configuration described with reference to FIGS.

  As shown in FIG. 10, the high pressure gas injection nozzle group 5 of the present embodiment includes a hollow casing 70 to which the high pressure gas 23 is supplied from the high pressure gas supply pipe 14, and a filter 2 from the lower surface of the hollow casing 70. Pipe 71 that is a plurality of high-pressure gas injection nozzles extending in the direction, and a guide rail 73 that is attached to the gantry 16 (not shown) by a bracket 74 and guides the hollow housing 70 in the horizontal direction in the width direction of the filter 2. Yes.

  The pipe 71, which is a high-pressure gas injection nozzle, has an injection port diameter (inner diameter) of 0.3 to 2 mm, and has m rows × n columns (m, n) on the lower surface of the hollow housing 70 as shown in FIG. n is an integer of 1 or more. Here, m is the number (number of rows) of pipes 71 arranged in the conveyance direction of the filter 2 indicated by the arrow B in FIG. 10, and n is a pipe arranged in a direction intersecting or perpendicular to the conveyance direction of the filter 2. 71 (number of columns). The pipe 71, which is a high-pressure gas injection nozzle, injects the high-pressure gas 23 supplied from the high-pressure gas supply pipe 14 connected to the hollow housing 70 toward the filter 2.

  As shown in FIG. 10, a left-right moving mechanism 72 is attached to the upper surface of the hollow casing 70, and the left-right moving mechanism 72 is guided by a guide rail 73 and is indicated by an arrow E in FIG. The hollow housing 70 is moved horizontally in the left-right direction.

  Next, a third process for injecting the high-pressure gas 23 from the high-pressure gas injection nozzle group 5 of the present embodiment will be described. A first step in which the cleaning liquid 22 is sprayed on the exhaust-side filter medium 40 of the filter 2 by the cleaning liquid spray nozzle group 4a and the fibers 41 are immersed in the cleaning liquid 22, and the suction-side filter medium 30 of the filter 2 by the cleaning liquid spray nozzle group 4b. The second step of spraying the cleaning liquid 22 to make the fibers 31 immersed in the cleaning liquid 22 is the same as the embodiment described with reference to FIGS. 1 to 9.

  In the third step of this embodiment, when the filter 2 conveyed by the roller conveyor 8 approaches the high pressure gas injection nozzle group 5, the high pressure gas 23 is supplied to the hollow housing 70 through the high pressure gas supply pipe 14. The high-pressure gas 23 supplied to the hollow housing 70 is injected to the surface of the exhaust-side filter medium 40 on the upper side of the filter 2 through pipes 71 attached to m rows × n columns. At the same time as the high-pressure gas 23 is supplied, the left-right moving mechanism 72 attached to the hollow housing 70 operates, and the hollow housing 70 moves between the brackets 74 attached to the guide rail 73 in FIG. Move left and right as shown by. The time required for the hollow housing 70 to move left and right on the guide rail 73 is determined by the transport speed of the filter 2, and the distance (L 1) that the filter 2 is transported while the hollow housing 70 reciprocates left and right once is the hollow housing 70. It is made to become smaller than the distance (L2) of the foremost line and the last line of the pipe 71 arrange | positioned at m line attached to. In this way, by controlling the conveyance speed of the filter 2, the high-pressure gas 23 injected from the pipe 71 attached to the hollow housing 70 hits the entire surface of the exhaust-side filter medium 40 of the filter 2.

  In the present embodiment, since the high-pressure gas 23 is injected from the pipe 71 attached to the hollow housing 70, the injection speed of the high-pressure gas 23 can be easily increased. In order to extrude the cleaning liquid 22 and the foreign substances 62, 63, and 64 that are retained in the laminated and fixed filter medium 20 as shown in FIG. 9, the high-pressure gas 23 is jetted at a speed of 50 m / sec to 34 m / sec to laminate and fix the filter medium. It is necessary to apply a gas pressure inside 20. As in the embodiment described with reference to FIG. 2, when the high-pressure gas injection nozzle groups 5 are arranged in a line in a direction perpendicular to the conveyance direction of the filter 2, the necessary gas is obtained because the injection region of the high-pressure gas 23 is strip-shaped. In order to obtain pressure, the amount of injected gas increases. On the other hand, when the pipe 71 is attached to the hollow housing 70, since the injection region of the high-pressure gas 23 is narrowed, there is an advantage that the amount of gas used is reduced and the economy is increased. Further, by arranging the pipes 71 in m rows × n columns, the high pressure gas 23 is intensively supplied to a narrow area where the pipes 71 are arranged, thereby effectively increasing the gas pressure in the area. The cleaning liquid 22 and the foreign substances 62, 63, 64 staying in the filter medium 20 fixed in a stacked manner can be effectively pushed out. The configuration of the high-pressure gas injection nozzle group 5 may be such that an injection port having the same inner diameter as the pipe 71 is formed in a rectangular parallelepiped member without using the pipe 71 as shown in FIG.

  1 filter cleaning device, 2 filter, 3 conveyor, 4a cleaning liquid spray nozzle group, 4b cleaning liquid injection nozzle group, 5 high pressure gas injection nozzle group, 6a, 6b roller, 7 belt, 8 roller conveyor, 9 roller shaft, 10 cleaning liquid tank, DESCRIPTION OF SYMBOLS 11 Cleaning liquid pump, 12 Cleaning liquid supply piping, 13 High pressure gas tank, 14 High pressure gas supply piping, 15 Lifting device, 16 Mount, 17 Support rod, 18 Injection liquid control apparatus, 19 Casing, 20 Filter medium, 22 Cleaning liquid, 22 Cleaning liquid, 23 High pressure Gas, 24a Cleaning liquid spray nozzle, 24b Cleaning liquid injection nozzle, 25 High pressure gas injection nozzle, 30 Intake side filter medium, 31, 41 Fiber, 32, 42 eyes, 40 Exhaust side filter medium, 50 Adhesive, 61-64 Foreign object, 70 Hollow casing , 71 pipe, 72 left-right moving mechanism, 73 guide rail, 4 bracket.

Claims (8)

A first filter medium in which the first fibers are entangled in a mesh pattern at a first interval, and a second fiber that is thinner than the first fiber is a mesh pattern at a second interval that is smaller than the first interval. And the first filter medium collects the first foreign matter, and the second filter medium collects the second foreign matter smaller than the first foreign matter. A filter cleaning device for cleaning a filter,
A cleaning liquid is sprayed onto the first filter medium to discharge a part of the first foreign matter from the first filter medium, and the first fiber of the first filter medium is immersed in the cleaning liquid to A cleaning liquid jet nozzle that peels off the remainder of the first foreign matter that has not been discharged from the filter medium from the first fiber;
A cleaning liquid spraying nozzle for spraying a cleaning liquid on the second filter medium and immersing the second fiber of the second filter medium in the cleaning liquid to separate the second foreign matter from the second fiber of the second filter medium. When,
A high-pressure gas is sprayed onto the filter, the cleaning liquid dipping the first fiber and the second fiber, the remainder of the first foreign matter peeled off from the first fiber and the second fiber, and the first A high-pressure gas injection nozzle for extruding two foreign substances to the outside of the filter;
A filter cleaning apparatus comprising: The filter cleaning device according to claim 1,
Comprising a filter conveying means for conveying the filter;
The cleaning liquid spray nozzle, the cleaning liquid spray nozzle, and the high-pressure gas spray nozzle are arranged in the order of the cleaning liquid spray nozzle, the cleaning liquid spray nozzle, and the high-pressure gas spray nozzle along the filter transport direction.
A filter cleaning device characterized by the above. The filter cleaning device according to claim 1 or 2,
The cleaning liquid injection nozzle is disposed below the filter,
The cleaning liquid spray nozzle and the high-pressure gas injection nozzle are disposed above the filter;
A filter cleaning device characterized by the above. The filter cleaning device according to any one of claims 1 to 3,
The filter cleaning apparatus, wherein a plurality of sets of the cleaning liquid spray nozzle, the cleaning liquid spray nozzle, and the high-pressure gas spray nozzle are provided as one set of continuous apparatuses. The filter cleaning device according to claim 1,
A hollow housing that is supplied with high-pressure gas and moves in a direction crossing the direction in which the filter is conveyed, and m rows × n columns (m and n are integers of 1 or more) on the surface of the hollow housing that faces the filter A high-pressure gas injection nozzle group having the high-pressure gas injection nozzles having a nozzle diameter of 0.3 mm to 2 mm arranged in
A filter cleaning device characterized by the above. A first filter medium in which the first fibers are entangled in a mesh pattern at a first interval, and a second fiber that is thinner than the first fiber is a mesh pattern at a second interval that is smaller than the first interval. And the first filter medium collects the first foreign matter, and the second filter medium collects the second foreign matter smaller than the first foreign matter. A filter cleaning method for cleaning a filter,
First spraying a cleaning liquid on the second filter medium, immersing the second fiber of the second filter medium in the cleaning liquid to separate the second foreign matter from the second fiber of the second filter medium Process,
A cleaning liquid is sprayed onto the first filter medium to discharge a part of the first foreign matter from the first filter medium, and the first fiber of the first filter medium is immersed in the cleaning liquid to A second step of peeling off the remainder of the first foreign matter that was not discharged from the filter medium from the first fiber;
A high-pressure gas is sprayed onto the filter, the cleaning liquid dipping the first fiber and the second fiber, the remainder of the first foreign matter peeled off from the first fiber and the second fiber, and the first A third step of extruding a second foreign substance to the outside of the filter;
A filter cleaning method comprising: The filter cleaning method according to claim 6,
The first step, the second step, and the third step are repeated a plurality of times as a set of continuous steps,
A filter cleaning method characterized by the above. The filter cleaning method according to claim 6 or 7,
In the first step, a cleaning liquid is sprayed on the filter from above the filter,
In the second step, a cleaning liquid is sprayed onto the filter from the lower side of the filter,
The third step is to inject high-pressure gas into the filter from above the filter;
A filter cleaning method characterized by the above.

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