JP6030360B2 - Oil mist collector - Google Patents

Description

  The present invention is capable of extending the maintenance interval of the filter over a long period of time on the premise of a device that separates and collects water-soluble or water-insoluble oil mist contained in the air using a filter. The present invention relates to an oil mist collecting device that can be sustained.

  Conventionally, an oil mist separator that separates and collects oil mist contained in air is known. There is also known a filter device that cleans the filter in order to prevent the filter from being blocked by clogging.

  For example, the “kitchen exhaust purification cleaning duct and kitchen exhaust purification device” of Patent Document 1 has an odor removal function in addition to an oil mist removal function, and can eliminate the need for cleaning the kitchen exhaust duct. In order to provide a small, easy-to-maintain kitchen exhaust purification device that can be easily added to the kitchen exhaust system, the cleaning panels are arranged in order at intervals so that the internal space is partitioned in the flow direction of the exhaust. The cleaning water containing deodorant is sprayed on the cleaning panel behind each cleaning panel except the last cleaning panel that is arranged and closest to the discharge port, and the water is recovered by the water curtain recovery method. Mist nozzle for cleaning, fog nozzle for removing odor components in exhaust by spraying cleaning water containing deodorant in a mist between the inlet and the first cleaning panel Between the outlet and the end of the cleaning panel, pressure drop compensating member to compensate for the pressure loss generated inside the cleaning ducts, the oil recovered water outlet on the bottom surface are provided.

JP 2005-205311 A

  In a device that separates and collects oil mist contained in the air, as long as the filter is used, it is also affected by dust contained in the air. Maintenance is required. In particular, when the oil mist is water-insoluble, there is a problem that the filter is easily clogged at an early stage and frequent maintenance is required.

  The present invention was devised in view of the above conventional problems, and is based on the premise of a device for separating and collecting water-soluble or water-insoluble oil mist contained in the air using a filter. An object of the present invention is to provide an oil mist collecting device capable of extending the interval and maintaining the operation time for a long period of time.

The oil mist collecting device according to the present invention is an oil mist collecting device that takes in air into a duct with a blower and separates and collects water-soluble or water-insoluble oil mist contained in the air, A filter provided in the duct; and an enzyme solution provided upstream of the filter in the duct along the air flow direction and collecting the oil mist in the air and making the filter soluble in water. In order to form a liquid film, a liquid film generating nozzle that ejects the enzyme solution toward the filter, and a duct provided upstream of the filter along the air flow direction in the duct. In order to wash away deposits to be clogged, a cleaning nozzle for jetting cleaning liquid toward the filter is provided, the cleaning nozzle is close to the filter, and the liquid film generation nozzle is remote from the filter. Therefore, the cleaning nozzle and the liquid film are generated so that the liquid film generation nozzle is not positioned behind the cleaning nozzle when viewed from the filter. The cleaning nozzle sprays the cleaning liquid onto the filter with a strong force, while the liquid film generation nozzle uses the enzyme liquid as a filter with a weaker force than the cleaning liquid. It is characterized by spraying .

  The duct has an air intake port formed at one end and an exhaust port formed at the other end. The air intake port and the exhaust port scatter the cleaning liquid ejected from the cleaning nozzle to the outside of the duct. In order to prevent this, the apparatus includes a cleaning air flow rate control means that is set above the position where the cleaning nozzle is installed, and that reduces the air flow rate of the blower during operation of the cleaning nozzle. To do.

  When the filter reaches a set clogging value, the liquid film generating nozzle is stopped, and nozzle control means for starting the cleaning nozzle is provided.

  The nozzle control means starts the liquid film generating nozzle after the cleaning nozzle is stopped in order to regenerate the enzyme liquid film after the cleaning with the cleaning liquid.

  In order to keep the blowing amount of the blower constant, the blower control means for increasing the output of the blower according to the progress of clogging of the filter is provided.

In the oil mist collecting device according to the present invention, the filter maintenance interval is extended on the premise of a device that separates and collects water-soluble or water-insoluble oil mist contained in the air using a filter. And the operation time can be maintained for a long time. Specifically, the cleaning nozzle can efficiently clean the liquid by spraying the cleaning liquid onto the filter with a strong force, while the liquid film generating nozzle can efficiently generate the liquid film by spraying onto the filter with a weaker force than the cleaning liquid. The cleaning nozzle is placed close to the filter, and the liquid film generation nozzle is set away from the filter. At this time, the cleaning nozzle and the liquid film are not positioned behind the cleaning nozzle as viewed from the filter. The generation nozzle is arranged in a shifted position, so that the enzyme liquid can be ejected from the liquid film generation nozzle to the filter without obstructing the washing nozzle, and the pressure of the air flowing in the duct In order not to increase the loss, the positional relationship between the cleaning nozzle and the liquid film generation nozzle can be provided so as to be displaced forward and backward with respect to the filter.

It is a whole lineblock diagram showing one suitable embodiment of an oil mist collection device concerning the present invention. It is a principal part enlarged view of the filter applied to the oil mist collection apparatus shown in FIG. It is a control flowchart figure of the oil mist collection apparatus shown in FIG. It is a time chart figure which shows the operation | movement sequence of the oil mist collection apparatus shown in FIG.

  Hereinafter, a preferred embodiment of an oil mist collecting device according to the present invention will be described in detail with reference to the accompanying drawings. 1 is an overall configuration diagram showing an oil mist collecting device 1 according to the present embodiment, FIG. 2 is an enlarged view of a main part of a filter 2 applied to the oil mist collecting device 1 shown in FIG. FIG. 4 is a control flowchart of the oil mist collecting device 1 shown in FIG. 1, and FIG. 4 is a time chart showing an operation sequence of the oil mist collecting device 1 shown in FIG.

  The oil mist collecting apparatus 1 according to the present embodiment is used when collecting a water-insoluble oil mist m. As shown in FIG. A duct 3 that takes in air from one end and exhausts it from the other end, a blower 4 that takes air into the duct 3 and exhausts the taken air, a filter 2 provided in the duct 3, and a duct 3, A liquid film generating nozzle 5 provided upstream of the filter 2 along the air flow direction, and a cleaning nozzle 6 provided upstream of the filter 2 along the air flow direction in the duct 3. Is done.

  The oil mist collecting device 1 according to the present embodiment is repeatedly and repeatedly operated mainly in two stages of an oil mist collecting operation stage and a filter cleaning operation stage, and replacement of the filter 2 and nozzles 5 and 6 are performed. It is stopped during maintenance such as cleaning.

  The duct 3 is arranged so as to lie approximately sideways, and a hollow cylindrical body portion 7 having a lateral opening 7a formed at the left end, a right end closed, and an upward opening 7b formed on the upper surface of the right end; One end is airtightly joined to the horizontal opening 7a of the main body 7 and one end is airtightly joined to the hollow cylindrical elbow 8 having the other end opened upward and the upward opening 7b of the main body 7. The other end of the hollow cylindrical body 9 is open at the other end.

  The other end of the elbow 8 constitutes the air intake 10 of the duct 3, and the other end of the short cylinder 9 constitutes the exhaust 11 of the duct 3. The height positions of the exhaust port 11 and the air intake port 10 are set to be higher than the upper surface of the main body portion 7. Further, the inner bottom surface of the main body 7 is formed by an inclined surface 12 having an inclination that gradually decreases from upstream to downstream in the air flow direction. A drain portion 13 that is connected to an external drain pipe (not shown) and discharges drain is provided in the middle of the inclined surface 12 and at the end of the inclined surface 12 (the right end of the main body portion 7).

  In the present embodiment, the duct 3 extends from the elbow part 8 to the short cylinder part 9 via the main body part 7 and has an inner surface formed in a rectangular cross section. However, the inner surface may have a circular cross section or a polygonal cross section. Further, the right end of the main body portion 7 may be configured using an elbow portion 8 similar to the left end.

  The blower 4 is installed on the exhaust port 11 side of the duct 3. When the blower 4 is operated, air is taken into the duct 3 from the air intake 10 and exhausted from the exhaust 11 to the outside of the duct 3. The blower 4 is provided with an inverter 14 that variably controls the amount of blown air (wind speed) by adjusting the output. The blower 4 may be provided on the air intake port 10 side, but it is preferably provided on the exhaust port 11 side in order to avoid fouling because of handling air including the oil mist m.

  In the duct 3, the filter 2 is provided between the air intake port 10 and the exhaust port 11, in the illustrated example, in the middle of the inclined surface 12. The filter 2 is provided so as to partition the duct 3 into an air intake port 10 side and an exhaust port 11 side so that the entire amount of air flowing through the duct 3 passes through the filter 2.

  Any conventionally known filter 2 may be used as long as it can generate a liquid film of the liquid to be sprayed on the surface of the filter 2 through which the oil mist m passes, for example, by surface tension. Also good. As the filter 2, for example, a well-known metal porous body filter having a spongy skeleton and a three-dimensional network shape is used. The duct 3 is provided with a loading / unloading port 15 that can be opened and closed by a door or the like in order to perform maintenance of the filter 2 by replacing the filter 2 or to replace the filter 2 on the side surface of the installation position of the filter 2. .

  In the duct 3, a liquid film generating nozzle 5 and a cleaning nozzle 6 are provided upstream of the filter 2 in the air flow direction. An enzyme liquid tank 19 is connected to the liquid film generating nozzle 5 via a first valve 17 and an enzyme liquid pump 18 provided in a pipe 16 extending to the outside of the duct 3. Enzyme solution F is stored in the enzyme solution tank 19. The enzyme solution F is one that makes water-insoluble oil soluble in water and is generally well known. The enzyme solution F may be diluted.

  When the first valve 17 is opened and the enzyme liquid pump 18 is activated, the enzyme liquid F is supplied from the enzyme liquid tank 19 to the liquid film generating nozzle 5 and is ejected from the liquid film generating nozzle 5 toward the filter 2. The enzyme liquid F ejected from the liquid film generation nozzle 5 adheres to the filter 2 and generates a liquid film L on the surface of the filter 2 (see FIG. 2). The liquid film L separates and collects the oil mist m in the air flowing in the duct 3 and simultaneously makes the oil mist m soluble in water.

  In addition, the enzyme liquid F is continuously ejected from the liquid film generating nozzle 5 so as to adhere to the filter 2 to maintain the liquid film L and collect the oil mist m. Then, it flows down the surface of the filter 2 and drops from the lower end of the filter 2 toward the inclined surface 12 of the duct 3.

  The cleaning liquid is supplied to the cleaning nozzle 6 via the second valve 21 and the cleaning liquid pump 22 provided in the pipe 20 extending to the outside of the duct 3. As the cleaning liquid, water or a known cleaning liquid is used.

  When the second valve 21 is opened and the cleaning liquid pump 22 is activated, the cleaning liquid is supplied to the cleaning nozzle 6 and ejected from the cleaning nozzle 6 toward the filter 2. The cleaning liquid ejected from the cleaning nozzle 6 is washed out from the filter 2 with deposits of oil mist m adhering to the filter 2 and clogging, and possibly deposits of oil mist m including dust. The cleaning liquid also drops from the lower end of the filter 2 toward the inclined surface 12 and is discharged from the drain portion 13 as drain.

  While the cleaning nozzle 6 can efficiently clean the sprayed liquid by spraying the cleaning liquid onto the filter 2, the liquid film generating nozzle 5 can efficiently spray the liquid film L by spraying the filter 2 at a lower speed than the cleaning liquid. In this embodiment, the cleaning nozzle 6 is placed close to the filter 2, and the liquid film generation nozzle 5 is placed away from the filter 2.

  At this time, the cleaning nozzle 6 and the liquid film generation nozzle 5 are arranged so as to be shifted from each other so that the liquid film generation nozzle 5 is not located behind the cleaning nozzle 6 when viewed from the filter 2. Thereby, the enzyme liquid F can be ejected from the liquid film production | generation nozzle 5 to the filter 2, without the washing nozzle 6 getting in the way. However, the cleaning nozzle 6 and the liquid film generation nozzle 5 may be provided side by side with respect to the filter 2.

  In order to prevent the pressure loss of the air flowing in the duct 3 from becoming large, the positional relationship between the cleaning nozzle 6 and the liquid film generating nozzle 5 is set so that the nozzles 5 and 6 are not concentrated in one place inside the duct 3. As in the present embodiment, it is preferable to provide the filter 2 so as to be displaced forward and backward.

  An air intake port 10 and an exhaust port 11 are set above the upper surface of the duct 3 with respect to the installation position of the cleaning nozzle 6 provided in the duct 3, and the cleaning liquid ejected from the cleaning nozzle 6 moves outward of the duct 3. It can be prevented from scattering.

  Although not shown in the drawing, an inspection port with a lid is provided on the upper surface of the duct 3 so that the liquid film generation nozzle 5 and the cleaning nozzle 6 can be exposed for maintenance.

  The oil mist collecting device 1 according to the present embodiment is provided with a differential pressure sensor 23, a wind speed sensor 24, and the inverter 14 and a control panel 25 for operation control.

  The differential pressure sensor 23 is inserted into the duct 3 and detects the internal pressure of the duct 3 upstream and downstream of the filter 2 at each detection terminal 23a installed upstream and downstream of the filter 2, and outputs the differential pressure. (See a in FIG. 1). The greater the differential pressure, the more clogging of the filter 2 has progressed. The wind speed sensor 24 is inserted into the duct 3 and detects and outputs the wind speed and hence the air volume (see b in FIG. 1). As the wind speed becomes slower, the clogging of the filter 2 progresses.

  The differential pressure sensor 23 and / or the wind speed sensor 24 are connected to the control panel 25, and the detected differential pressure value a and wind speed b are input to the control panel 25. The control panel 25 controls the operation of the enzyme liquid pump 18 and the first valve 17 for operating / stopping the liquid film generating nozzle 5, the cleaning liquid pump 22 and the second valve 21 for operating / stopping the cleaning nozzle 6, and also the blower 4. A control signal (see c, d, e in FIG. 1) is output to the inverter 14 to be controlled.

  In the control panel 25, a set clogging value (set differential pressure value) and a setting lower limit wind speed value, which are control values relating to clogging of the filter 2, and a set air volume of the blower 4 are set. Further, the control panel 25 is provided with a timer 26 for measuring the time for control.

  The control panel 25, the differential pressure sensor 23 and / or the wind speed sensor 24 constitute nozzle control means. In the nozzle control means, when the differential pressure value a and the wind speed b detected by the differential pressure sensor 23, that is, the clogged state reaches the set clogged value (set differential pressure value) or the set lower limit wind speed value, the control panel 25 Outputs the control signals c and d, stops the liquid film generating nozzle 5 that ejects the enzyme liquid F, starts the cleaning nozzle 6 that ejects the cleaning liquid from the stopped state, and starts the filter from the oil mist collecting operation stage. Switch to the washing operation stage.

  In the nozzle control means, the control panel 25 outputs control signals c and d. When the filter 2 has been cleaned, the operation of the cleaning nozzle 6 is stopped, and a liquid film is generated in order to resume the collection of the oil mist m. The nozzle 5 may be restarted to increase the concentration of the enzyme solution in the liquid film L with the enzyme solution F.

  Further, the control panel 25, the inverter 14, the differential pressure sensor 23, and / or the wind speed sensor 24 are clogged in the filter 2 in order to keep the air flow rate of the blower 4 constant (set wind speed) in the oil mist collecting operation stage. Functions as blower control means for raising the output of the blower 4 as the air travels. In the blower control means, detected values such as the differential pressure a detected by the differential pressure sensor 23 and the wind speed b detected by the wind speed sensor 24 are input to the control panel 25, and the control panel 25 reduces the air flow rate of the blower 4. Then, a control signal e is output to the inverter 14 so as to recover it to a constant amount (set wind speed), and the inverter 14 increases the output of the blower 4.

  Further, the control panel 25 and the inverter 14 output the start signal d to the cleaning liquid pump 22 and the opening signal d of the second valve 21 when the cleaning nozzle 6 is in the filter cleaning operation stage. The control signal e for lowering the output of the blower 4 is output to the inverter 14 and functions as a cleaning air flow rate control means for reducing the air flow rate of the blower 4. By reducing the blast volume by the cleaning blast volume control means, the cleaning liquid that collides with the filter 2 and scatters is prevented from scattering from the air intake port 10 and the exhaust port 11 to the outside of the duct 3.

  Although not shown, a lamp that is turned on during cleaning may be provided to notify the filter cleaning operation. The oil mist collecting apparatus 1 according to the present embodiment may be a stationary type that is installed on the floor or a suspended type that is suspended from a ceiling or the like.

  Next, the operation of the oil mist collecting device 1 according to the present embodiment will be described with reference to FIGS. 3 and 4. The operation control is executed according to the time measured by the timer 26 of the control panel 25. First, the start signals c and e are output from the control panel 25 to the blower 4, the enzyme solution pump 18 and the first valve 17, and the oil mist collecting operation is started. At this time, the cleaning liquid pump 22 is stopped and the second valve 21 is closed.

  As a result, the enzyme water F is ejected from the liquid film generating nozzle 5 to generate a liquid film L on the filter 2, and air including the oil mist m is taken into the duct 3 from the air intake port 10.

  When the air passes through the filter 2, the oil mist m contained in the air is separated from the air by the liquid film L of the enzyme solution F and collected, and becomes soluble in water by the liquid film L. Since the enzyme solution F is continuously sprayed on the filter 2 in order to maintain the liquid film L, the enzyme solution F flows down with the collected oil mist m in the filter 2 due to the action of gravity. Then, the liquid drops from the filter 2 toward the inclined surface 12 of the duct 3.

  The enzyme solution F dropped onto the inclined surface 12 flows along the inclined surface 12 and is discharged from the drain portion 13 to the outside of the duct 3 as a drain. The air from which the oil mist m has been separated and removed is exhausted from the exhaust port 11 of the duct 3.

  During the oil mist collecting operation, wind speed measurement and differential pressure measurement are continued by the wind speed sensor 24 and the differential pressure sensor 23. When repeatedly monitoring the wind speed or the like, if the wind speed falls below the set wind speed, the control panel 25 outputs a control signal e that increases the output to the inverter 14, whereby the wind speed of the blower 4 is restored to and maintained at the set wind speed. The On the other hand, when the set wind speed is maintained, the control of the blower 4 by the inverter 14 is not changed, and the enzyme liquid pump 18 is continuously operated to filter the enzyme liquid F from the liquid film generating nozzle 5. It spouts continuously toward 2.

  In the control panel 25, the oil mist collecting operation time is counted by the timer 26. After the set time elapses in the oil mist collecting operation, the control panel 25 stops the enzyme solution pump 18 and outputs a control signal c for closing the first valve 17.

  Next, the process proceeds to the filter cleaning operation. In the filter cleaning operation, the control panel 25 outputs an activation signal d to the cleaning liquid pump 22 and the second valve 21. As a result, the cleaning liquid is ejected from the cleaning nozzle 6 toward the filter 2, and the filter 2 is cleaned. Since the oil mist m is collected by the enzyme solution F that makes the oil mist m soluble in water, the filter 2 can be easily and quickly washed and cleaned with a cleaning solution such as water.

  The blower 4 is continuously operated from the oil mist collecting operation to the filter cleaning operation. When the filter cleaning operation starts, the control panel 25 outputs a control signal e for reducing the output to the inverter 14, thereby reducing the amount of air blown by the blower 4. As an example, the air volume of the blower 4 during the filter cleaning operation is reduced to about 40% during the normal operation. By reducing the amount of air blown by the blower 4, it is possible to prevent the cleaning liquid that collides with the filter 2 and scatters from leaking out from the air intake port 10 and the exhaust port 11.

  In the control panel 25, the filter cleaning operation time is counted by the timer 26. When the set time is reached, the control panel 25 stops the cleaning liquid pump 22 and outputs a control signal d for closing the second valve 21. Further, a stop signal e of the blower 4 is output to the inverter 14. Thereby, the operation of the oil mist collecting device 1 is stopped and the filter 2 is dried (see FIG. 4). The operation stop time is also counted by the timer 26. When the predetermined time has elapsed, the oil mist collecting operation is started again.

  The above is the operation control by the timer 26, but automatic operation control according to the detection values a and b by the differential pressure sensor 23 and the wind speed sensor 24 may be performed by the nozzle control means. That is, regarding the control for shifting from the oil mist collecting operation to the filter cleaning operation, as described above, a set clogging value (set differential pressure value) and a set lower limit wind speed value are set in the control panel 25, and the differential pressure sensor is set. When the detected value a by 23 or the like reaches the set clogging value or the like, the oil mist collecting operation may be shifted to the filter cleaning operation.

  Further, after cleaning with the cleaning liquid by the nozzle control means, the liquid film is generated after the cleaning nozzle 6 is stopped so that the enzyme liquid concentration of the liquid film L of the enzyme liquid F is recovered in the filter 2 and the liquid film L is regenerated. Control for starting the nozzle 5 may be executed. This control uses the timer 26 of the control panel 25 to clean the filter 2 with the cleaning nozzle 6 for a predetermined time as described above, stop the operation of the blower 4 and dry the filter 4, and then restart the blower 4. Prior to this, the enzyme liquid F is ejected from the liquid film generating nozzle 5 toward the filter 2 to wash the filter 2 with the enzyme liquid F and to generate the liquid film L. After a predetermined time has elapsed, the blower 4 is restarted. It starts and resumes oil mist collection operation.

  In this way, a liquid film L having a predetermined concentration can be generated in advance on the filter 2, and the oil mist m can be reliably collected from the restart point. The preceding generation of the liquid film L may be performed prior to the start of the blower 4 when the oil mist collecting device 1 is started.

  If the oil mist collecting operation and the filter cleaning operation are continuously repeated, the clogging of the filter 2 is not sufficiently recovered. As shown in FIG. 4, this is detected by differential pressure measurement by the differential pressure sensor 23 or wind speed measurement by the wind speed sensor 24. If the differential pressure value a exceeds the set differential pressure value due to the time set by the timer 26 of the control panel 25, the operation of the oil mist collecting device 1 is stopped, the filter 2 is taken out from the duct 3, Perform maintenance such as cleaning and replacement. On the other hand, when the set differential pressure value is not reached, the normal operation control is executed.

  In the oil mist collecting device 1 according to the present embodiment described above, the solution of the enzyme solution F provided in the duct 3 and collecting the oil mist m in the air in the filter 2 and making it soluble in water. In order to form the film L, the liquid film generation nozzle 5 that ejects the enzyme liquid F toward the filter 2 is provided, so that the oil mist m can be easily removed from the filter 2 by the liquid film L formed on the filter 2. Therefore, the filter 2 is less likely to be clogged, whereby the maintenance interval of the filter 2 can be extended, and the operation time can be maintained for a long time.

  In addition, in order to wash away the deposits that clog the filter 2, the cleaning nozzle 6 that jets the cleaning liquid toward the filter 2 is provided. Therefore, the oil mist m that has been made soluble in water is further washed away with the cleaning liquid. As a result, the maintenance interval of the filter 2 can be extended and the operation time can be maintained for a long period of time.

  The air intake port 10 and the exhaust port 11 formed in the duct 3 are set above the position where the cleaning nozzle 6 is installed in order to prevent the cleaning liquid ejected from the cleaning nozzle 6 from scattering outside the duct 3. In addition, since the air flow rate control unit for reducing the air flow rate of the blower 4 during operation of the cleaning nozzle 6 is provided, it is possible to prevent peripheral devices and the like from being soiled by the cleaning liquid or the like.

  In order to keep the air flow rate of the blower 4 constant, the air blower control means for increasing the output of the blower 4 according to the progress of the clogging of the filter 2 is provided, so that the oil mist m collecting ability is maintained. On the other hand, the oil mist collecting operation time can be extended, and the cycle time of the oil mist collecting operation and the filter cleaning operation can be set to be long, so that the maintenance interval of the filter 2 can also be extended.

  When the filter 2 reaches the set clogging value, the operation of the liquid film generation nozzle 5 is stopped and the nozzle control means for starting the cleaning nozzle 6 is provided, so that the oil mist collecting operation time is extended to the maximum. Can be rationally controlled automatically.

  Since the nozzle control means activates the liquid film generation nozzle 5 after the cleaning nozzle 6 is stopped in order to regenerate the liquid film L of the enzyme liquid F after the cleaning with the cleaning liquid, the liquid film L in the filter 2 is appropriately generated. The oil mist m can be collected appropriately.

  In the above embodiment, the case where the enzyme liquid F is ejected from the liquid film generating nozzle 5 to collect the water-insoluble oil mist m and the liquid film L of the enzyme liquid F is generated on the filter 2 has been described. The collection target is not limited to the water-insoluble oil mist m, but may be water-soluble oil mist. In this case, instead of the enzyme solution F, water or an oil mist liquefying agent is directed toward the filter 2. What is necessary is just to eject from the liquid film production | generation nozzle 5, and even if it is a case where water-soluble oil mist is collected by this, the effect similar to the said embodiment can be acquired.

DESCRIPTION OF SYMBOLS 1 Oil mist collection apparatus 2 Filter 3 Duct 4 Blower 5 Liquid film production | generation nozzle 6 Washing nozzle 10 Air intake port 11 Exhaust port 14 Inverter 23 Differential pressure sensor 24 Air speed sensor 25 Control panel 26 Timer F Enzyme liquid L Liquid film m Water-insoluble Sex oil mist

Claims (5)

An oil mist collecting device that takes air into a duct with a blower and separates and collects water-soluble or water-insoluble oil mist contained in the air,
A filter provided in the duct; and an enzyme solution provided upstream of the filter in the duct along the air flow direction and collecting the oil mist in the air and making the filter soluble in water. to form a liquid film, the liquid film generated nozzles for ejecting enzyme Motoeki toward the filter,
In the duct, provided with a cleaning nozzle that is provided upstream of the filter along the air flow direction, and that jets cleaning liquid toward the filter in order to wash away deposits that clog the filter,
The cleaning nozzle is placed close to the filter, the liquid film generating nozzle is placed away from the filter, and is displaced from the front and back with respect to the filter. The cleaning nozzle and the liquid film generation nozzle are disposed so as not to be located behind the cleaning nozzle,
The cleaning nozzle sprays the cleaning liquid onto the filter with a strong force, while the liquid film generation nozzle sprays the enzyme liquid onto the filter with a weaker force than the cleaning liquid. apparatus. The duct has an air intake port formed at one end and an exhaust port formed at the other end. The air intake port and the exhaust port scatter the cleaning liquid ejected from the cleaning nozzle to the outside of the duct. In order to prevent this, the apparatus includes a cleaning air flow rate control means that is set above the position where the cleaning nozzle is installed, and that reduces the air flow rate of the blower during operation of the cleaning nozzle. The oil mist collection device according to claim 1 . 3. The oil according to claim 1 , further comprising nozzle control means for stopping the operation of the liquid film generation nozzle and starting the cleaning nozzle when the filter reaches a set clogging value. Mist collecting device. 4. The oil mist collecting device according to claim 3, wherein the nozzle control unit starts the liquid film generating nozzle after the cleaning nozzle is stopped in order to regenerate the liquid film of the enzyme solution after cleaning with the cleaning liquid. apparatus. 5. The fan control device according to claim 1, further comprising a blower control unit configured to increase an output of the blower in accordance with the progress of the clogging of the filter in order to make the blown amount of the blower constant . The oil mist collection apparatus as described in the term of .

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