JP2007307492A - Filter washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical filter washing device that effectively removes dust without damaging a filter medium. <P>SOLUTION: A vibrating means 9a is provided in the filter washing device 41 and the dust is removed by vibrating the filter. Waste water in the device 41 and a filter pre-washing device 45 are stored in a sedimentation/flocculation tank 44 and a pre-washing sedimentation/flocculation tank 42 is recycled to perform filter-washing excellent in a low-running cost and environmental load. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filter cleaning device suitable for use in, for example, a gas turbine system or an air conditioning system.

  When suctioning atmospheric air in the intake part of the gas turbine, a filter is installed in the intake duct part to remove atmospheric dust in order to reduce the output if dust in the atmosphere flows in and adheres to the blades of the gas turbine. Yes. As the dust is collected, the pressure loss increases with time, so when the exchange pressure loss is reached, the filter is replaced with a new one and is treated as waste.

For the purpose of reducing waste and running cost, a cleaning and regeneration filter is known in which a filter that has reached an exchange pressure loss is washed and regenerated and reused. FIG. 12 shows a perspective view of such a cleaning regeneration filter. The cleaning regeneration filter is bent so that the filter medium 7 forms peaks and valleys, forms a zigzag filter surface with respect to the inflowing fluid, and is surrounded by a filter frame 51.
As a cleaning method, ultrasonic cleaning is mainly performed. (See Patent Document 1)

Japanese Unexamined Patent Publication No. 2000-317230 (paragraph [0005] and FIGS. 3 and 6)

  However, in ultrasonic cleaning, when the ultrasonic force is increased, the surface of the non-woven fabric of the filter becomes rough, the filter is damaged, and the performance of collecting dust is lowered.

  This invention is made | formed in view of such a situation, Comprising: It is providing the washing | cleaning method and filter washing | cleaning apparatus which do not damage a filter.

In order to solve the above problems, the filter cleaning apparatus of the present invention employs the following means.
That is, according to the first aspect of the present invention, a conveying unit that conveys a filter to which dust is attached, a primary spray nozzle that ejects fluid from one side of the filter and removes dust on the gas inflow side of the filter, It is a filter dust removing device that is disposed opposite to the primary spray nozzle and includes a secondary spray nozzle that ejects fluid and removes dust on the gas outflow side of the filter.

The filter is placed on the transport means and moved, and high-pressure water is ejected from one side of the filter with a spray nozzle and washed. With respect to the primary side (inflow side) of the filter to which most of the dust adheres, the primary spray nozzle ejects high-pressure water, so that the filter dust is separated and the cleaning effect can be enhanced. More preferably, when the filter is placed so that the primary side of the filter faces downward and covers the conveying means, and the filter dust is released toward the direction of gravity when washed with the high pressure water of the primary spray nozzle from below the conveying means, the effect Can be cleaned automatically. Moreover, if a plurality of spray nozzles are installed, filter dust can be further removed.
Here, the filter dust removing device is a device that removes filter dust, and is, for example, a filter pre-cleaning device, a cleaning device, or a rinsing device. For example, a roller conveyor can be used as the conveying means.

  If dust is previously removed using the filter dust removing apparatus of this embodiment as preliminary cleaning for filter cleaning, even a filter with much dust adhesion can be cleaned while suppressing contamination of the cleaning liquid in a subsequent cleaning step.

  A second embodiment according to the present invention is the filter dust removing device according to the first embodiment, wherein nozzle angles of the primary spray nozzle and the secondary spray nozzle are variable.

By adopting a structure in which the nozzle angle is variable, the entire filter can be washed without unevenness. Further, since the conveying means moves and each nozzle maintains a suitable angle regardless of the direction of the filter with respect to the nozzle, a wide area and depth can be cleaned.
In addition, when the filter is stopped and washed, a mechanism for changing the water pressure according to the nozzle angle can be added.

  According to a third aspect of the present invention, when the primary spray nozzle and / or the secondary spray nozzle is close to the filter medium, the fluid ejection pressure is reduced and the distance from the filter medium is long. The filter dust removing device according to the second embodiment, which increases the fluid ejection pressure.

  The distance detection means calculates the distance between the nozzle and the filter medium, and uses pressure adjusting means to adjust the ejection pressure according to the distance between the nozzle and the filter medium. If the distance between the filter medium and the nozzle is far, the ejection pressure When the distance between the filter medium and the nozzle is small, the ejection pressure can be reduced.

  When cleaning the back of the primary side where a lot of dust is attached, increase the pressure, and when cleaning the front of the filter, decrease the pressure so that the cleaning pressure applied to the filter becomes substantially constant. Damage can be prevented. In particular, it is possible to easily remove dust in the back part of the filter primary side, which is difficult to clean.

  According to a fourth aspect of the present invention, any one of the primary spray nozzle and the secondary spray nozzle is set to have a fluid ejection pressure higher than the other one. This is a filter dust removing device.

  A filter dust removing device in which the fluid spray pressure of the primary spray nozzle is set higher than the fluid spray pressure of the secondary spray nozzle can be provided. Since the fiber strength of the filter medium on the primary side (fluid inflow side) of the filter is strong and the fiber strength of the filter medium on the secondary side (fluid outflow side) of the filter is small, the fluid spray pressure of the primary spray nozzle is adjusted to the secondary spray nozzle. If the jetting pressure is set higher than the fluid jetting pressure, the dust adhering to the secondary side can be washed off from the secondary side while washing away the dust with a strong pressure from the primary side without damaging the filter medium.

  According to a fifth aspect of the present invention, there are provided gripping means for gripping a filter to which dust adheres, a vibrator for applying vibration to the filter via the gripping means, and a cleaning tank for immersing the filter in a cleaning liquid. A filter cleaning apparatus provided for removing dust from the filter by applying vibration from the vibrator through the filter gripping means in the cleaning tank.

  By removing the dust by vibrating the filter, there is no influence of the density of standing waves in the conventional ultrasonic cleaning, the filter medium can be damaged, and the filter can be cleaned evenly.

  According to a sixth aspect of the present invention, there is provided a cleaning liquid outlet provided in the cleaning tank, and a circulation pipe for circulating the cleaning liquid extracted from the cleaning liquid outlet to the cleaning tank. It is a filter washing | cleaning apparatus as described in a 5th form provided with the strainer which removes the inside separation dust.

  By circulating the cleaning liquid while removing the dust contained in the cleaning liquid, the cleaning liquid can be continuously purified and reused. In addition, by removing the dust that is sometimes generated and mixed in the cleaning liquid, it is possible to suppress the reattachment of the dust and improve the cleaning efficiency.

  A seventh aspect according to the present invention is the sixth aspect according to the sixth aspect, wherein the circulation pipe is provided with a clean water supply port, and the filter is rinsed with the cleaning tank using clean water introduced from the clean water supply port. It is a filter cleaning device.

  The filter can be washed and rinsed in the same washing tank, and the operation can be performed by opening and closing the valve of the clean water supply port provided in the circulation pipe.

  According to an eighth aspect of the present invention, the sixth or sixth aspect includes a filtering unit that separates dust that is not removed by the strainer in the cleaning liquid and a detergent concentration monitoring unit that monitors the detergent concentration in the cleaning liquid. 7 is a filter cleaning apparatus according to the seventh embodiment.

  By installing the filtering means, the dust that is not removed by the strainer can be separated from the cleaning liquid, the expensive detergent can be collected, and the cleaning liquid can be reused. By providing a detergent concentration sensor in the middle of the piping, the detergent concentration can be monitored on time. Further, if the detergent charging means is provided in the circulation pipe, a system for automatically charging the detergent can be constructed. Detergent concentration sensors can add costly detergent without waste.

  According to a ninth embodiment of the present invention, gripping means for gripping a filter to which dust is attached, a vibrator for applying vibration to the filter via the gripping means, and removing dust by ejecting fluid to the filter A washing tank equipped with a washing nozzle, a coagulation sedimentation tank for pre-washing that stores the waste water of the pre-washing liquid used in the pre-washing, and a precipitate that stores the waste water of the washing liquid used in the washing or the waste water of clean water used in the rinsing A filter cleaning system comprising a tank and a membrane separation device for filtering waste water from the settling tank, wherein the filter is vibrated in the cleaning tank for preliminary cleaning to remove dust, and contains separated dust The prewash waste water to be stored is stored in the prewash coagulation sedimentation tank, and a coagulant precipitant is added to the prewash wastewater to precipitate dust, and the supernatant liquid is reused as a wash liquid. The filter is washed or rinsed to remove dust, and the waste liquid of the cleaning tank containing the separated dust is stored in the sedimentation tank, and the stored waste liquid is filtered by the membrane separation means as a cleaning liquid. A filter cleaning system that reuses and performs pre-cleaning, cleaning, and rinsing in a single cleaning tank.

  Cleaning efficiency can be enhanced by providing a filter cleaning system that vibrates the filter with a vibrator and ejects fluid from the cleaning nozzle toward the filter. By providing a coagulation sedimentation tank and a coagulation sedimentation tank for preliminary washing, dust can be removed from wastewater generated by preliminary washing, washing and rinsing, and used again for washing. In addition, pre-cleaning, cleaning and rinsing of the filter can be performed in one cleaning tank. Performing from pre-washing to rinsing using a single washing tank can reduce the initial investment in the system, and reducing the running cost and reducing the environmental burden by reusing wastewater. Can do. Since the main cleaning tank performs preliminary cleaning, cleaning, and rinsing in one tank, it is not necessary to move the filter, and is a cleaning system that does not require a very large area. A detergent concentration sensor may be provided in the middle of the cleaning tank.

  A tenth aspect according to the present invention includes a conveying unit that conveys a filter to which dust adheres, a primary spray nozzle that ejects fluid from the gas inflow side of the filter by removing fluid from one side of the filter, and the primary spray. A filter pre-cleaning means disposed opposite to the nozzle and having a secondary spray nozzle that ejects fluid and removes dust on the gas outflow side of the filter; and a filter pre-cleaned by the filter pre-cleaning means. A filter cleaning device that performs cleaning and rinsing, a coagulation sedimentation tank for pre-cleaning that stores waste water generated from the filter pre-cleaning means, a precipitation tank that stores waste water generated from the filter cleaning device, and waste water from the precipitation tank A filter cleaning system comprising a membrane separation device for filtering a pre-cleaning wastewater containing dust separated by the pre-cleaning means Stored in the coagulation sedimentation tank for pre-cleaning, add coagulating precipitant to the pre-cleaning wastewater to precipitate dust and reuse the supernatant liquid as cleaning liquid, and / or remove dust in the washing tank and remove A filter cleaning system for storing pre-cleaning, cleaning, and rinsing by storing the cleaning waste liquid containing the dust in the settling tank, filtering the stored cleaning waste liquid by the membrane separation means, and reusing it as a cleaning liquid.

  By providing the pre-cleaning means and the filter cleaning device that performs cleaning and rinsing independently, even if the filter has a large amount of dust, the pre-cleaning means can remove the dust from the filter in advance. Cleaning can be performed while suppressing contamination of the cleaning liquid in the subsequent cleaning process. Further, the waste water of the pre-cleaning liquid generated by the pre-cleaning means can be regenerated and used by the coagulating precipitant. In addition, by providing the preliminary cleaning means and the filter cleaning device that performs cleaning and rinsing independently, the filter can be cleaned by a flow operation, and a large amount of filters can be cleaned efficiently.

  By washing and rinsing by vibrating the filter dust, it is more uniform than ultrasonic cleaning and dust can be removed without damaging the filter. Moreover, dust can be removed from the waste water generated by washing and rinsing by providing a coagulation sedimentation tank, and it can be used again for washing. In addition, a roller conveyor can be used for a conveyance means, for example. A detergent concentration sensor may be provided in the middle of the piping of the filter cleaning device.

The present invention has the following effects.
It is possible to clean the primary side and secondary side of the filter with appropriate pressures, respectively, and to prevent the filter from being damaged. The filter can be regenerated by washing without deteriorating the performance of collecting dust without roughening the surface of the nonwoven fabric of the filter. As a result, even if the filter has an increased pressure loss due to use, after reaching the replacement pressure loss, the filter can be washed and regenerated, and waste can be reduced.
In addition, it is possible to remove fine dust from relatively coarse dust from wastewater generated by the filter cleaning system from the wastewater using a sedimentation tank and membrane separation means, and the water and detergent can be used effectively.

Embodiments according to the present invention will be described below with reference to the drawings.
[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In FIG. 9, a filter cleaning system 40 is shown. The filter cleaning system 40 is an apparatus that includes a preliminary cleaning, cleaning, and rinsing process for the filter.

The filter cleaning system 40 includes a filter cleaning device 41, a preliminary cleaning coagulation sedimentation tank 42, a membrane separation device 43, and a sedimentation tank 44.
The filter cleaning device 41 stores the cleaning liquid 10 in the cleaning tank 8 and cleans the filter 1. Both ends of the filter 1 are gripped by the gripping means 9, and vibration is given by the vibrator 9 a through the gripping means 9. The filter cleaning device 41 includes cleaning nozzles 21 a and 21 b that clean the filter 1, and cleans the filter medium 7 of the filter 1.

  The cleaning nozzles 21a and 21b spray the cleaning liquid, tap water, or clean water supplied from the line 22 onto the filter medium 7 to purify the filter. A cleaning liquid or the like is sprayed on the filter primary side 5 by the cleaning nozzle 21a. Further, a cleaning liquid or the like is sprayed on the secondary side of the filter by the cleaning nozzle 21b.

FIG. 13 shows a cross-sectional view of the filter medium 7 as an example. The filter primary side 5 is the side where the dust mixed gas flows in, and the filter secondary side 6 is the side where the gas after dust removal flows out.
The filter material on the filter primary side 5 is a nonwoven fabric made of polypropylene fibers in which a plurality of layers having different effective opening diameters are laminated, and the filter material on the filter secondary side 6 is a polyester whose surface is coated with a polyolefin resin. A nonwoven fabric made of fibers or a nonwoven fabric made of polyolefin resin fibers.
In the figure, the filter primary side 5 and the filter secondary side 6 are laminated in order from the upstream side of the air flow indicated by the arrow, and the effective opening diameter of each layer of the filter medium on the filter primary side 5 is downstream of the air flow. The smaller it is to the side. Since the filter primary side is made of a filter material using relatively thick fibers, the strength of the filter primary side 5 is higher than that of the filter secondary side 6.

Therefore, the cleaning nozzle 21a can clean the filter 1 with a stronger pressure than the other cleaning nozzle 21b. Here, the relationship among the water pressure of the cleaning liquid ejected from the nozzle, the cleaning efficiency, and the soundness of the filter will be described with reference to FIG.
As the water pressure increases, the amount of dust that can be removed increases as the water pressure increases, and the cleaning efficiency of the filter tends to increase as the water pressure increases. On the other hand, the soundness of the filter, that is, the probability that the filter medium will not be damaged by water pressure is kept constant up to a certain value as shown by the two-dot broken line in the graph. Since the filter cloth is damaged, the soundness tends to decrease as the water pressure increases. If the soundness of the filter is lost, the amount of dust that can be collected by the filter is lowered, so that the dust collection rate, that is, the filter performance is lowered.
Therefore, cleaning the filter using the strongest water pressure within a range where the filter performance does not deteriorate can be referred to as a cleaning water pressure with high filter performance. That is, it is preferable to use the ejection pressure near the vertex of the solid line that draws the curve of the graph.

The filter cleaning apparatus according to the first embodiment of the present invention includes the following steps.
Pre-cleaning step: The pre-cleaning of the filter 1 is performed in order to largely remove the dust of the filter 1 in advance. In the preliminary cleaning, dust having a relatively large particle size such as sand and metal particles is removed. At this time, if there is a detergent, the effect of the flocculant is reduced, so that no detergent is used.
Cleaning step: Dust that is difficult to be removed by preliminary cleaning such as carbon clogging the filter medium 7 of the filter 1 is removed.
Rinsing step: The detergent components and dust adhering to the filter 1 washed in the washing step are removed.
Hereinafter, these steps will be described with reference to FIG. 9 again.

[Preliminary washing process]
Preliminary cleaning liquid is ejected from the cleaning nozzles 21a and 21b to the filter 1 placed in the cleaning tank 8, and dust is removed in advance. At this time, the filter 1 is vibrated by the vibration exciter 9a. The preliminary cleaning liquid can use tap water supplied from the line 23. Further, as the pre-cleaning liquid, it is possible to use reclaimed water obtained by adding a flocculant to the cleaning waste water stored in the pre-cleaning coagulation sedimentation tank 42 to remove dust and the like. Reclaimed water is supplied from line 30 to line 22 by pump 34.

[Washing process]
The cleaning liquid is supplied to the cleaning tank 8 through the line 23 or the line 24. In the cleaning tank 8 in which the cleaning liquid is stored, the cleaning liquid is ejected from the cleaning nozzles 21a and 21b to the filter 1 to remove dust. The cleaning liquid contains a detergent component and can be, for example, a phosphorus-based detergent. At this time, the filter 1 is vibrated by the vibration exciter 9a.

  The cleaning liquid can be extracted from the bottom of the cleaning tank 8, dust in the cleaning liquid is removed by the strainer 12 provided in the line 28, and ejected from the cleaning nozzles 21 a and 21 b through the line 22 again. The cleaning liquid may be stored in the sedimentation tank 44, regenerated through the membrane separation device 43, and ejected from the cleaning nozzles 21a and 21b through the line 25 again. This membrane separator completely removes dust contained in the cleaning liquid, and collects and reuses water and costly detergents.

[Rinsing process]
Clean water for rinsing is supplied from line 24. The cleaning liquid in the cleaning tank 8 is once discharged from the line 29 and stored in the precipitation tank 44. Thereafter, the filter 1 of the washing tank 8 is rinsed with clean water. The water used in the rinsing can be reused in the washing process and the preliminary washing process, and water can be effectively used.

  The line 22 of the filter cleaning system 40 is provided with a pump 31 that sends out pre-cleaning liquid supplied from the line 23 or clean water supplied from the line 24, and a pump 32 that sends out cleaning liquid supplied from the line 28. ing. The line 25 is provided with a pump 33 that feeds the cleaning liquid that has passed through the membrane separation device 43. The line 30 is provided with a pump 34 for delivering a precleaning liquid for the precleaning coagulation sedimentation tank 42.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In FIG. 10, a filter cleaning system 40 is shown. The filter cleaning system 40 is an apparatus that includes a filter preliminary cleaning step and a cleaning / rinsing step independently.

  The filter cleaning system 40 according to this embodiment includes a filter preliminary cleaning device 45, a filter cleaning device 41, a preliminary cleaning coagulation sedimentation tank 42, a membrane separation device 43, a sedimentation tank 44, and the roller conveyor 2. ing.

  The filter preliminary cleaning device 45 is a device that removes dust adhering to the filter 1 prior to the cleaning step. The filter preliminary cleaning device 45 stores a primary spray nozzle 3 that ejects the preliminary cleaning liquid toward the filter 1, a secondary spray nozzle 4, a waste water tray 36 that recovers the preliminary cleaning liquid after preliminary cleaning, and the recovered preliminary cleaning liquid. And a coagulation sedimentation tank 42 for preliminary washing.

  The primary spray nozzle 3 and the secondary spray nozzle 4 spray the preliminary cleaning liquid supplied from the line 38 onto the filter medium, and purify the filter in advance. The primary spray nozzle 3 sprays preliminary cleaning liquid on the filter primary side 5. The secondary spray nozzle 4 sprays preliminary cleaning liquid on the filter secondary side 6.

  The filter cleaning device 41 stores the cleaning liquid 10 in the cleaning tank 8 and cleans the filter 1. Both ends of the filter 1 are gripped by the gripping means 9 and are vibrated by the vibrator 9 a through the gripping means 9. The filter cleaning device 41 includes cleaning nozzles 21 a and 21 b that clean the filter 1, and cleans the filter medium 7 of the filter 1.

  The cleaning nozzles 21a and 21b spray the cleaning liquid or clean water supplied from the line 24 onto the filter medium to purify the filter. The cleaning nozzle 21 a sprays cleaning liquid or the like on the primary side of the filter 1. The cleaning nozzle 21b sprays cleaning liquid or the like on the filter secondary side.

The filter cleaning system 40 having the above configuration includes the following steps.
Pre-cleaning step: The pre-cleaning of the filter 1 is performed in order to largely remove the dust of the filter 1 in advance.
Cleaning step: Dust clogged in the filter medium of the filter 1 is removed.
Rinsing step: The detergent components and dust adhering to the filter 1 washed in the washing step are removed.

[Preliminary washing process]
The filter 1 to which dust adheres is sent to the filter preliminary cleaning device 45 by the roller conveyor 2, and preliminary cleaning liquid is ejected from the primary spray nozzle 3 and the secondary spray nozzle 4 to the filter 1 to remove dust in advance. As the preliminary cleaning liquid, for example, recycled water obtained by adding a flocculant to the cleaning waste water stored in the preliminary cleaning coagulation sedimentation tank 42 to remove dust and the like can be used.
By providing the filter pre-cleaning device 45 in the pre-cleaning process independently from the filter cleaning device 41 in the cleaning process, the dust removal efficiency in the pre-cleaning process is enhanced and the reattachment of dust separated from the filter 1 in the cleaning process is prevented. can do.

[Washing process]
The precleaned filter 1 is carried to the filter cleaning device 41 and fixed by the gripping means 9. The filter 1 is immersed in the cleaning liquid in the cleaning tank 8. The cleaning liquid is ejected from the cleaning nozzles 21 a and 21 b and removes dust adhering to the filter 1. The cleaning liquid contains a detergent component and can be, for example, a phosphorus-based detergent. At this time, the filter 1 is vibrated by the vibration exciter 9a.

  The cleaning liquid is drawn out from the bottom of the cleaning tank 8, dust in the cleaning liquid is removed by the strainer 12 provided in the line 28, and is ejected from the cleaning nozzles 21 a and 21 b again. Further, the cleaning liquid can be stored in the sedimentation tank 44 and regenerated through the membrane separation device 43 and ejected from the cleaning nozzles 21a and 21b through the line 25 again. This membrane separator completely removes dust contained in the cleaning liquid, and collects and reuses water and costly detergents.

[Rinsing process]
Clean water for rinsing is supplied from line 24. The cleaning liquid in the cleaning tank 8 is discharged from the bottom of the cleaning tank. In the cleaning tank 8 from which the cleaning liquid has been discharged, clean water is ejected from the cleaning nozzles 21a and 21b to the filter 1 and rinsed. The water used in the rinsing can be stored in the sedimentation tank 44, and can be reused in the next filter washing step via the membrane separator.

  The line 22 of the filter cleaning system 40 is provided with a pump 31 for sending clean water supplied from the line 24 and a pump 32 for sending cleaning liquid supplied from the line 28. The line 25 is provided with a pump 33 that sends out the cleaning liquid that has passed through the membrane separation device 43. The line 38 is provided with a pump 35 for feeding the precleaning liquid for the precleaning coagulation sedimentation tank 42.

Hereinafter, the constituent devices of the above-described embodiments will be described in more detail.
The filter preliminary cleaning apparatus 45 shown in the second embodiment will be described. FIG. 8 shows the nozzle portion of the filter preliminary cleaning device 45.

  The filter pre-cleaning device 45 includes a roller conveyor 2 that conveys the filter 1 to be cleaned, a primary spray nozzle 3 below the roller conveyor 2, and a secondary spray nozzle 4 above the roll conveyor 2. Has been. The roller conveyor 2 has a gap structure through which the filter 1 is sent to the cleaning unit by the roller conveyor belt 2a and the roller 2b, and the roller conveyor in the cleaning unit allows high-pressure water ejected from the lower primary spray nozzle 3 to pass therethrough.

The primary spray nozzle 3 and the secondary spray nozzle 4 are arranged with the roller conveyor 2 and the filter 1 interposed therebetween. The nozzles (injection positions) 3a of the primary spray nozzle 3 and the nozzles (injection positions) 4a of the secondary spray nozzle 4 are not arranged on the same straight line in the vertical direction, but are alternately displaced. It is preferable. As a result, even when the filter is pleated or when the filter is washed in a stationary state, the nozzles 3a and 4a of the primary spray nozzle 3 and the secondary spray nozzle 4 can face the vicinity of the pleat valley. This is because it can be effectively cleaned to the depth of the pleats.
Or if it is set as the structure (for example, refer FIG.1 (b)) which the nozzle located in both ends faces inside among the primary spray nozzle 3 and the secondary spray nozzle 4, wash water can be used without waste. Moreover, when a filter is a pleat shape, it is preferable that the spray water flow waveform of each nozzle is a planar fan shape because it can be effectively washed to the depth of the pleat.

  The primary spray nozzle 3 ejects high-pressure water of about 0.5 to 1.0 MPa and removes dust adhering to the filter primary side 5. The secondary spray nozzle 4 ejects high pressure water of about 0.2 to 0.5 MPa to remove dust adhering to the filter secondary side 6. Here, the filter primary side 5 refers to the fluid inflow side to the filter, and the filter secondary side 6 refers to the fluid outflow side to the filter.

  By making the high pressure water of the primary spray nozzle 3 relatively strong and making the high pressure water of the secondary spray nozzle 4 relatively weak, while protecting the weak filter medium fiber on the secondary side, there are many on the primary side of the filter. Adhering dust can be removed efficiently.

As shown in FIG. 8, if the nozzle angles of the spray nozzles 3 and 4 are fixed, the configuration of the apparatus becomes simple and can be provided at low cost.
On the other hand, as shown in FIG. 1, the angles of the primary spray nozzle 3 and the secondary spray nozzle 4 may be variable. Here, FIG. 1A is a front view, and FIG. 1B is a side view. By making the nozzle angle variable in this way, even when the roller conveyor 2 is moved at a low speed or when the roller conveyor 2 is in a stationary state, the filter medium 7 can be uniformly distributed. Can be washed.
The direction of the nozzle and the jetting strength of the nozzle can be controlled as follows, for example. As shown in FIG. 1B, the primary spray nozzle 3 and the secondary spray nozzle 4 are each fixed to one nozzle mounting pipe 52. By rotating the nozzle mounting pipe 52 around its axis, the direction of the nozzle is changed. By adjusting the water supply valve (not shown) together with the angle of the nozzle mounting pipe 52, the angle of the variable resistor (not shown) and the nozzle can be linked, and the signal from the variable resistor is used to control the solenoid valve. Can apply and adjust water flow.

  FIG. 2 shows an example of washing water jetting onto the filter medium 7 folded in a zigzag manner as described above. When cleaning the portion 5a close to the primary spray nozzle 3 on the primary side of the filter, the pressure of the high-pressure water of the primary spray nozzle 3 is set to be small, and when cleaning the deep portion 5b on the primary side of the filter, the high pressure of the primary spray nozzle 3 is set. By setting the water pressure large, the filter medium 7 can be washed without damaging the filter medium 7.

  With such a configuration and control, it is possible to change the water pressure according to the angle of the nozzle to increase the efficiency of removing dust, and it is possible to remove dust that has entered the gap of the filter 1 without leakage. In the preliminary cleaning device, a plurality of primary spray nozzles 3 and secondary spray nozzles 4 are provided, respectively, so that the entire filter can be thoroughly cleaned.

  The filter pre-cleaning device 45 is provided with a flocculant supply means (not shown), and the water used in the pre-cleaning precipitates dust with a flocculant such as PAC (polyaluminum chloride), alum, iron chloride and the like. Later, it can be used again as a preliminary wash.

  A filter cleaning device 41 suitable for use in the first embodiment and the second embodiment will be described below. FIG. 3 shows a filter cleaning device 41.

  The filter cleaning device 41 includes a cleaning tank 8 filled with the cleaning liquid 10 and a gripping means 9 for gripping the filter 1. The gripping means 9 grips the filter 1 from both sides of the filter 1, soaks the filter 1 in the cleaning liquid 10 of the cleaning tank 8, and applies vibration to the filter 1 in the horizontal direction (the direction of the arrow shown). The vibration applied to the filter at this time is determined based on the natural frequency of the filter. Although it depends on the size of the filter, if the filter is 600 (W) × 600 (H) × 300 (D) mm, it is preferable that the gripping means gives a vibration of about 10 or more Hz.

  By vibrating the filter 1 in the cleaning liquid 10, the attached dust can be removed and the filter can be cleaned evenly. The cleaning liquid 10 can be, for example, phosphoric acid soap. Compared to ultrasonic cleaning, there is no density of standing waves and stable cleaning performance. Moreover, damage to the filter can be reduced.

FIG. 4 shows a filter cleaning device 41 that reuses the cleaning liquid.
The filter cleaning device 41 includes a cleaning tank 8 filled with the cleaning liquid 10 and a gripping means 9 for gripping the filter 1. The circulation pipe 11 is pulled out from the lower part of the cleaning tank 8, and the circulation pipe 11 is provided with a pump 13 and a strainer 12 for removing dust mixed in the cleaning liquid 10.

  Dust separated from the filter during filter cleaning is mixed into the cleaning liquid 10, and the cleaning liquid 10 mixed with dust is drawn out from the circulation pipe 11 to the strainer 12, dust is removed by the strainer 12, and the circulation pipe is supplied to the cleaning tank 8 by the pump 13. Returned from end 14 again.

  By removing the dust mixed in the cleaning liquid 10, the reattachment of the dust to the filter 1 can be suppressed, and the cleaning efficiency can be improved. Further, by continuously purifying the cleaning liquid 10, the cleaning liquid 10 can be reused and the consumption of the cleaning liquid can be reduced.

FIG. 5 shows a filter cleaning device 41 that reuses the cleaning liquid.
The filter cleaning device 41 is provided with a cleaning tank 8 filled with a cleaning liquid 10 inside and a gripping means 9 for gripping the filter 1. The circulation pipe 11 is drawn from the lower part of the cleaning tank 8. And the strainer 12 which removes the dust mixed in the cleaning liquid 10 is provided. The purified cleaning liquid 10 is returned to the cleaning tank 8 from the circulation pipe end 14 a provided in the vicinity of the filter medium 7 of the filter 1.

  Since the circulation pipe end 14a ejects the cleaning liquid 10a in the vicinity of the filter medium 7 processed into a mini-pleat shape, the cleaning liquid 10 around the filter medium 7 can be moved, and dust adhering to the filter medium 7 can be removed. It can be removed and the cleaning efficiency can be increased.

  The filter medium 7 may be cleaned by providing a plurality of circulation pipe ends 14a, or the filter medium 7 may be cleaned by using one circulation pipe end 14a as a movable type. By making the tip of the circulation pipe end 14a a shape having a plurality of nozzles, the cleaning efficiency can be further increased. The attached dust removal rate after cleaning was 70% without preliminary cleaning, and 92% when preliminary cleaning was performed. However, the adhering dust removal rate is the total adhering dust amount obtained by subtracting the unused filter weight from the weight of the adhering dust filter, and 100% adhering dust removal when the total adhering dust amount is removed. Rate.

FIG. 6 shows a filter cleaning device 41 of a cleaning liquid reuse type with a rinsing function.
The filter cleaning apparatus includes a cleaning tank 8 filled with a cleaning liquid 10 inside and a gripping means 9 for gripping the filter 1. A circulation pipe 11 is drawn from the lower part of the cleaning tank 8, and a pump 13 is connected to the circulation pipe 11. A strainer 12 for removing dust mixed in the cleaning liquid 10 is provided. A circulation pipe end 14 for returning the cleaning liquid 10 purified in the cleaning tank 8 is provided above the cleaning tank 8.

  A clean water line 15 is provided in the middle of the circulation pipe 11. The clean water line 15 is provided with a valve 16 for adjusting the amount of clean water to be introduced. The cleaning tank 8 is provided with a cleaning liquid discharge port (not shown).

  By providing the clean water line 15 and the cleaning liquid discharge port, the cleaning liquid 10 can be replaced even during cleaning. Further, the filter 1 can be rinsed in the cleaning tank 8 by discharging the cleaning liquid 10 from the cleaning liquid discharge port and supplying water from the clean water line.

FIG. 7 shows a detergent reuse filter cleaning device 41.
The filter cleaning apparatus is purified in the cleaning tank 8 filled with the cleaning liquid 10, the gripping means 9 for gripping the filter 1, the circulation pipe 11 drawn from the lower part of the cleaning tank 8, and the upper part of the cleaning tank 8. A circulation pipe end 14 for returning the cleaning liquid 10 is provided. The circulation pipe 11 is provided with a pump 13, a strainer 12 for removing dust mixed in the cleaning liquid 10, a filtration membrane 17, a bypass line 18, and a detergent sensor 19.

  The filtration membrane 17 allows the costly detergent component contained in the cleaning liquid 10 of the circulation pipe 11 to be recovered and reused. Further, the detergent concentration of the circulation pipe 11 can be monitored by the detergent sensor 19 without being affected by dust. Furthermore, in order to set the concentration of the cleaning liquid 10 to a desired value, the detergent concentration of the cleaning liquid 10 can be adjusted by supplying the detergent from the bypass line 18 without waste. The detergent sensor may be provided in the cleaning tank 8 in addition to the circulation pipe 11. In addition, the detergent concentration in the cleaning tank 8 can be adjusted.

As shown in FIG. 8, the rinsing device 46 can have the same configuration as the filter pre-cleaning device 45. That is, the rinsing device 46 includes the shower 20 and the roller conveyor 21. The shower 20 is provided above the filter 1 and sprays water from the filter secondary side 6 toward the filter medium 7. It is set as the flowing water which sprays water from one direction with respect to the filter 1 after washing | cleaning. With such a configuration, it is possible to rinse the detergent that tends to remain in the narrowed filter portion. A shower 20 can also be provided below the filter 1. The rinse waste water can be used as the cleaning liquid 10. The washed filter 1 is sent to a dryer.
The rinsing device does not have to be arranged as a separate device in the filter cleaning system when rinsing is performed in the cleaning tank 8, and in this case, there is no need for a roller conveyor.

It is a figure which shows the nozzle part of the filter preliminary cleaning apparatus which concerns on this invention. It is an enlarged view of the primary spray nozzle of the filter preliminary cleaning apparatus which concerns on this invention. It is a figure which shows the filter washing | cleaning apparatus which concerns on this invention. It is a figure which shows the filter washing | cleaning apparatus which reuses the washing | cleaning liquid which concerns on this invention. It is a figure which shows the filter washing | cleaning apparatus which reuses the washing | cleaning liquid which concerns on this invention. It is a figure which shows the washing | cleaning-liquid reuse type | mold washing apparatus with a rinse function which concerns on this invention. It is a figure which shows the detergent reusable filter cleaning apparatus which concerns on this invention. It is a figure which shows the filter preliminary washing apparatus or rinse apparatus which concerns on this invention. It is a figure showing a filter washing system concerning a first embodiment of the present invention. It is a figure which shows the filter washing | cleaning system which concerns on 2nd embodiment of this invention. It is a graph which shows the pressure of the fluid to eject, the performance of a filter, cleaning efficiency, and the soundness of a filter. It is a figure which shows the filter wash | cleaned in the filter washing | cleaning system which concerns on this invention. It is a figure which shows the cross-section of a filter medium.

Explanation of symbols

1 Filter 2 Roller Conveyor 2a Roller Conveyor Belt 2b Roller 3 Primary Spray Nozzle 4 Secondary Spray Nozzle 5 Filter Primary Side 5a Part Close to Filter Primary Side Nozzle 5b Filter Primary Side Recessed Part 6 Filter Secondary Side 7 Filter Filter 8 Washing tank 9 Grasping means 9a Exciter 10 Washing liquid 11 Circulating piping 12 Strainer 13 Pump 14 Circulating piping end 14a Circulating piping end 15 Clean water line 16 Valve 17 Filtration membrane 18 Bypass line 19 Detergent sensor 20 Shower 21 Cleaning nozzle 21a Cleaning nozzle 21b Washing nozzle 36 Waste water tray 40 Filter washing system 41 Filter washing device 42 Preliminary washing coagulation sedimentation tank 43 Membrane separation device 44 Precipitation tank 45 Filter prewashing device 46 Rinse device 50 Filter material filter medium 51 Filter frame 52 Nozzle attachment Piping

Claims (10)

  Conveying means for conveying a filter to which dust has adhered, a primary spray nozzle for ejecting fluid from one side of the filter to remove dust on the gas inflow side of the filter, and a fluid that is disposed opposite the primary spray nozzle, And a secondary spray nozzle for removing dust on the gas outflow side of the filter.   The filter dust removing device according to claim 1, wherein nozzle angles of the primary spray nozzle and the secondary spray nozzle are variable.   The primary spray nozzle and / or the secondary spray nozzle reduces the fluid ejection pressure when the distance to the filter medium is short, and increases the fluid ejection pressure when the distance from the filter medium is long. Item 3. The filter dust removing device according to Item 2. The filter dust removing device according to any one of claims 1 to 3, wherein either one of the primary spray nozzle or the secondary spray nozzle is set to have a higher fluid ejection pressure than the other. A gripping means for gripping the filter to which dust has adhered;
A vibrator for applying vibration to the filter via the gripping means;
A cleaning tank in which the filter is immersed in a cleaning solution;
A filter cleaning device comprising:
A filter cleaning apparatus for removing dust from the filter by applying vibration from the vibration exciter through the filter gripping means in the cleaning tank. A cleaning liquid outlet provided in the cleaning tank, and a circulation pipe for circulating the cleaning liquid extracted from the cleaning liquid outlet to the cleaning tank,
The filter cleaning apparatus according to claim 5, wherein the circulation pipe is provided with a strainer for removing detached dust in the cleaning liquid.   The filter cleaning apparatus according to claim 6, wherein the circulation pipe is provided with a clean water supply port, and the filter is rinsed with the cleaning tank using clean water introduced from the clean water supply port.   The filter cleaning apparatus according to claim 6 or 7, further comprising a filtering unit that separates dust that is not removed by the strainer in the cleaning liquid and a detergent concentration monitoring unit that monitors the detergent concentration in the cleaning liquid. A cleaning tank comprising: gripping means for gripping a filter to which dust has adhered; a vibrator for applying vibration to the filter through the gripping means; and a cleaning nozzle for ejecting fluid to the filter to remove dust. ,
A coagulation sedimentation tank for pre-cleaning to store the waste water of the pre-cleaning liquid used in the pre-cleaning;
A settling tank for storing waste water of cleaning liquid used for cleaning or clean water used for rinsing;
A filter cleaning system comprising a membrane separation device for filtering waste water from the settling tank,
Pre-washing is performed in the washing tank to remove dust, pre-washing wastewater containing separated dust is stored in the pre-washing coagulation sedimentation tank, and a coagulating precipitant is added to the pre-washing waste water to precipitate the dust. Reuse the supernatant as a cleaning solution,
Alternatively, cleaning or rinsing is performed in the cleaning tank to remove dust, and the waste liquid of the cleaning tank containing the separated dust is stored in the sedimentation tank, and the stored waste liquid is filtered by the membrane separation means as a cleaning liquid. Reuse,
A filter cleaning system that performs pre-cleaning, cleaning and rinsing in a single cleaning tank. Conveying means for conveying a filter to which dust has adhered, a primary spray nozzle for ejecting and removing the dust on the gas inflow side of the filter from one side of the filter, and a fluid which is disposed opposite the primary spray nozzle, Filter pre-cleaning means provided with a secondary spray nozzle that ejects and removes dust on the gas outflow side of the filter;
A filter cleaning device for cleaning and rinsing the filter precleaned by the filter precleaning means;
A coagulation sedimentation tank for pre-cleaning for storing waste water generated from the filter pre-cleaning means;
A settling tank for storing waste water generated from the filter cleaning device;
A filter cleaning system comprising a membrane separation device for filtering waste water from the settling tank,
Pre-cleaning wastewater containing dust separated by the pre-cleaning means is stored in the pre-cleaning coagulation sedimentation tank, a coagulating precipitant is added to the pre-cleaning waste water to precipitate dust, and the supernatant liquid is reused as a cleaning liquid. ,
And / or storing the cleaning waste liquid containing the dust removed by removing dust in the cleaning tank in the settling tank, filtering the stored cleaning waste liquid by the membrane separation means, and reusing it as a cleaning liquid. Filter cleaning system for cleaning, cleaning and rinsing.

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