JP4856320B2 - Oil mist removal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centrifugal rotation type oil mist removing apparatus that uses centrifugal force to remove oil mist adhering to a filter, and in particular, passes a gas containing mist from the outside to the inside of a cylindrical filter. The present invention relates to an oil mist removing device that collects oil mist, dust, and the like from the outer surface side of a filter.
[0002]
[Prior art]
In general, when performing various kinds of metal processing such as cutting, it is known that oil mist in the form of fine smoke is generated in the air. Oil mist not only greatly deteriorates the working environment and causes great harm to workers, but if it is discharged, it will also contribute to air pollution. Therefore, conventionally, an oil mist removing device is installed in a factory or the like where cutting is performed in order to remove oil mist generated during processing. At present, interest in environmental conservation is increasing, and a high-performance oil mist removing device is strongly demanded, and various methods are put into practical use.
[0003]
For example, an electrostatic oil mist removing device includes a discharge electrode and a dust collecting electrode. A DC high voltage is applied between both electrodes to generate a corona discharge, and the oil mist in the air is utilized using Coulomb force. Is being collected. However, since an electrostatic system uses a high voltage, an insulating structure is indispensable. In addition, if the oil mist remains attached to the dust collecting electrode, the dust collecting performance deteriorates. Therefore, maintenance work for removing the oil mist from the dust collecting electrode must be performed periodically. In particular, when the oil mist is highly sticky, this maintenance work is troublesome and an economic burden increases. In addition to the above method, a filtration method using an air filter has been proposed. However, in the filtration method, it is necessary to frequently clean or replace the filter so that the air filter is not clogged, which is also expensive.
[0004]
Therefore, recently, a centrifugal rotation method has been put to practical use as a method for reducing maintenance work and reducing costs. This method collects oil mist with a filter and then applies centrifugal force to the filter to cause the oil mist adhering to the filter to be detached from the filter, which has the advantage of reducing the frequency of cleaning and replacement of the filter. Here, a centrifugal rotation type oil mist removing device will be described in detail with reference to the schematic view of FIG.
[0005]
As shown in FIG. 8, a cylindrical casing 1 is provided, and a cylindrical drum filter 2 is coaxially disposed therein with a predetermined clearance. The drum filter 2 passes air and collects oil mist, and is configured to be rotated by a drive motor (not shown). In such an oil mist removing device, air 3 containing oil mist is fed into the drum filter 2 while the drum filter 2 is rotated by the driving force of the drive motor. The air that has entered the drum filter 2 passes through the drum filter 2 and enters the casing 1. When the air passes through the drum filter 2, oil mist adheres to the inside of the drum filter 2 due to inertial collision effect and blocking effect. At this time, since the drum filter 2 rotates at a high speed, the inertial collision effect and the blocking effect can be increased, and oil mist can be collected efficiently. Further, the air that has passed through the drum filter 2 exits from the casing 1 to the outside.
[0006]
The oil mist adhering to the drum filter 2 gathers and grows to form oil droplets having a certain size. On the other hand, since the drum filter 3 is rotated by the driving force of the driving motor, the oil droplets adhering to the drum filter 2 receive a centrifugal force. As a result, the oil droplets jump out of the drum filter 2 and collide with the inner wall portion of the casing 1. In this way, oil mist can be separated from the drum filter 2.
[0007]
[Problems to be solved by the invention]
However, the above-described conventional technology of the centrifugal rotation method has the following problems. That is, the oil mist includes a liquid substance that is the oil itself and a carbonized solid that is generated when the oil mist is generated, and the viscosity of the oil mist on the drum filter 2 is high. In the conventional example of FIG. 8, since the air 3 containing oil mist enters from the inside of the drum filter 2 and escapes to the outside, highly viscous oil mist and solid matter are sequentially deposited on the inner peripheral portion of the drum filter 2. Will go. Therefore, the drum filter 2 is easily clogged, and the air 3 containing oil mist is difficult to pass through the drum filter 2. As a result, it becomes difficult for air to pass through the drum filter 2, the pressure loss increases, and the oil mist removal performance decreases as the air volume decreases. The air that has passed through the drum filter 2 flows along the inner wall portion of the casing 1, but oil mist that has jumped out of the drum filter 2 is attached to the inner wall portion of the casing 1. For this reason, there is a possibility that the oil mist may be scattered again in the air from which the oil mist has been removed, and the purified air will become dirty.
[0008]
The present invention has been proposed to solve the above problems, and its main purpose is to prevent clogging of the filter due to accumulation of dirt such as oil mist having increased viscosity and solid matter in the oil mist. It is to provide a high-performance and low-cost oil mist removing device that can be easily avoided and maintenance-free.
Another object of the present invention is to provide an oil mist removing device that can prevent the purified air and the air containing the oil mist from mixing to exhibit an excellent air cleanliness.
Furthermore, another object of the present invention is to provide an oil mist removing apparatus capable of maintaining excellent performance for a long period of time by cleaning a filter.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an intake port for taking air containing oil mist into the casing, and an exhaust port for taking clean air from which oil mist has been removed to the outside of the casing. A rotating member having a space therein is housed in the casing, and a filter that collects oil mist while allowing air to pass therethrough is mounted on the rotating member, and the filter is disposed inside the rotating member. A spray nozzle is installed toward the inner surface side of the nozzle, the cleaning liquid is sprayed from the spray nozzle, a centrifugal force is generated by the rotating operation of the rotating member, and the oil mist collected by the filter is collected by the centrifugal force. An oil mist removing apparatus configured to be separated from a filter and collect the same has the following technical features. [0010]
According to a first aspect of the present invention, the intake port is disposed in the casing so as to send air containing oil mist from the outside to the inside of the rotating member, and the exhaust port takes out clean air from the inside of the rotating member. An electrolyzed water generator for generating electrolyzed alkaline water and electrolyzed acidic water , wherein a spray nozzle for injecting a cleaning liquid toward the inner surface of the filter is installed inside the rotating member. An alkaline water pipe for supplying the electrolytically strong alkaline water and an acidic water pipe for supplying the electrolytically strong acidic water are disposed in the electrolytic water generator, and the spray nozzle is connected to the alkaline water pipe. The casing is provided with a drain pipe for flowing the drain of the cleaning liquid, and the acidic water pipe is connected to the drain pipe .
In the invention of claim 1 as described above, the air containing the oil mist enters the casing from the intake port and enters the inside from the outside of the cylindrical filter attached to the rotating member. At this time, the filter collects oil mist by inertial collision effect and blocking effect. Since the oil mist collected by the filter adheres from the outer surface side of the filter, the centrifugal force due to the rotating operation of the rotating member does not act in the direction of pushing the oil mist into the filter. Therefore, the highly viscous oil mist and solid matter grown on the filter can be smoothly detached from the filter without any obstacles. As a result, highly viscous oil mist and solid matter do not accumulate on the filter. As a result, the filter does not cause clogging, allows air to pass smoothly, and maintains the initial oil mist removal performance.
Furthermore, electrolyzed alkaline water and electrolyzed acidic water can be produced by an electrolyzed water generator, and the electrolyzed alkaline water can be supplied to a spray nozzle and used as a cleaning liquid. Electrolytic strong alkaline water has a high dissolving power and an excellent solvent effect for taking in soluble components, and is suitable for dissolving oils and fats, proteins and the like, so that highly viscous oil mists and solids can be easily washed away. Moreover, since electrolyzed alkaline water tends to react with oxygen in the air, it returns to neutral if exposed to air as it is. Therefore, there is no persistence, it is possible to ensure excellent safety, and it is suitable as a cleaning liquid used for an environmental conservation type apparatus. Furthermore, it is possible to mix the electrolytic acid water generated as a secondary matter with the drainage from the casing to obtain a neutral drainage. Therefore, it can be drained as it is, and environmental harmony is improved.
Since the spray nozzle sprays the cleaning liquid toward the filter where the centrifugal force works, viscous oil mist and solid matter accumulated on the outside of the filter can be cleaned using the centrifugal force, and the filter is clogged. Can be reliably and easily prevented. Therefore, the oil mist removal performance can be maintained over a long period of time. Moreover, since the highly viscous oil mist and solid matter adhering to the filter are dropped from the rotating member to the casing, the cleanliness inside the rotating member can be maintained.
[0011]
According to a second aspect of the present invention, in the oil mist removing apparatus according to the first aspect, an airtight seal mechanism is provided between the exhaust port and the rotating member.
In the second aspect of the present invention, since the airtight seal mechanism is provided between the exhaust port and the rotating member, the air containing the oil mist in the casing and the purified air are not mixed with each other. Can keep the degree.
[0012]
According to a third aspect of the present invention, in the oil mist removing device according to the first or second aspect, an exhaust fan is connected to the exhaust port.
In the above invention of claim 3, since the air in the rotating member can be exhausted by the exhaust fan, the air can be surely taken out from the exhaust port against the centrifugal force caused by the rotation of the filter. In addition, it is possible to intake air from a desired position and exhaust air to a desired position by attaching the exhaust fan.
[0013]
According to a fourth aspect of the present invention, in the oil mist removing apparatus according to the first, second, or third aspect, a blower is connected to the intake port.
In the above invention of claim 4, the inside of the casing can be set to a positive pressure, a back pressure can be applied to the collected portion of the collected oil mist, and the operation of collecting the liquefied oil is facilitated.
[0015]
According to a fifth aspect of the present invention, in the oil mist removing apparatus according to the first, second, third, or fourth aspect , the spray nozzle is configured to intermittently eject the cleaning liquid.
In the above invention of claim 5 , since the spray nozzle ejects the cleaning liquid intermittently, the amount of the cleaning liquid used can be reduced. Moreover, since the moisture contained in the exhaust gas from the oil mist removing device is small, the interior of the room does not become high humidity, and the production device and products can be prevented from generating rust.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
(1) First Embodiment [Configuration]
Hereinafter, an example of an embodiment according to the present invention will be specifically described with reference to the drawings. The first embodiment is a centrifugal rotation type oil mist removing apparatus and includes the inventions of claims 1 to 5 . 1 is a cross-sectional view of the first embodiment, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of a drum filter in the first embodiment, and FIG. 4 is an air-tight seal mechanism in the first embodiment. It is an expanded sectional view.
[0019]
As shown in FIGS. 1 and 2, in the first embodiment, a rotating rotor 12 is disposed inside a cylindrical casing 11 with a predetermined space. The central axis of the rotary rotor 12 is arranged so as to coincide with the central axis of the casing 11. The rotary rotor 12 is connected to a rotary shaft of a drive motor 14 that applies high-speed rotational force to the rotary rotor 12. Further, a drum filter 13 is attached to the rotary rotor 12. The drum filter 13 collects oil mist while allowing air to pass, and is made of a cylindrical member equipped with a washable nonwoven fabric or other washable filter (see FIG. 3).
[0020]
As shown in FIG. 1, a frustum-shaped air inlet 15 is formed in the side surface of the casing 11. The intake port 15 is disposed in the casing 11 so as to send air 17 containing oil mist from the outer peripheral portion of the rotary rotor 12 to the inner peripheral portion. In addition, a cylindrical exhaust port 20 is formed in the casing 11, and an exhaust fan 21 is connected thereto. The exhaust fan 21 takes out the clean air 22 from which the oil mist has been removed to the outside of the casing 11. A drain port 19 is provided on the bottom surface of the casing 11.
[0021]
Further, an airtight seal mechanism 18 is installed between the exhaust port 20 and the rotary rotor 12. As shown in FIG. 4, the hermetic seal mechanism 18 is provided with a first metal plate 18 a that protrudes outward from the rotary rotor 12 and a second metal plate 18 b that protrudes inward from the casing 11. The plate 18a is located above the metal plate 18b, and both are arranged to face each other. Between these metal plates 18a and 18b and between the end surface of the casing 11 and the metal plate 18a, a seal portion 18c is formed by oil.
[0022]
Incidentally, a spray nozzle 23 is installed in the rotary rotor 12. The spray nozzle 23 is configured to intermittently spray the cleaning liquid onto the drum filter 13. Further, an electrolyzed water generating device 24 for generating electrolyzed strong alkaline water 26 and electrolyzed strongly acidic water 27 is provided. A water pipe 27a is arranged. The alkaline water pipe 26 a is connected to the spray nozzle 23, and the acidic water pipe 27 a is connected to the drain tank 25. The drain port 19 is connected to the drainage tank 25, and here, the electrolytic strong alkaline water 26 and the electrolytically strong acidic water 27 are mixed to form a neutral drainage 28.
[0023]
[Function and effect]
The operational effects of the first embodiment having the above-described configuration are as follows. That is, air 17 containing oil mist enters the inside of the casing 11 through the intake port 15 and enters the inside from the outer peripheral portion of the drum filter 13. When passing through the drum filter 13, oil mist and solid matter in the air 17 are attached to the outer surface of the drum filter 13 by inertial collision effect and blocking effect. At this time, since the drum filter 13 rotates at a high speed together with the rotary rotor 12 by the driving force of the drive motor 14, the inertial collision effect and the blocking effect are enhanced, and oil mist can be collected efficiently.
[0024]
The oil mist adhering to the drum filter 13 gradually grows and becomes oil droplets having a large particle diameter. Further, the carbonized solid produced simultaneously with the generation of oil mist is also attached to the drum filter 13. Since the drum filter 13 rotates at a high speed as described above, a large centrifugal force is applied to the oil droplets and solid matter, and these are separated from the drum filter 13 toward the casing 11.
[0025]
According to the first embodiment as described above, the centrifugal force generated by the rotation of the drum filter 13 is used to separate the highly viscous oil mist and solid matter from the drum filter 13, thereby depositing on the outer surface of the drum filter 13. Can be avoided. Moreover, the spray nozzle 23 intermittently injects electrolytic strong alkaline water 26 toward the inner surface of the drum filter 13 for cleaning. Since the electrolytically strong alkaline water 26 has a large cleaning effect, the drum filter 13 can be reliably prevented from being clogged with oil mist. As a result, the drum filter 13 can smoothly pass air, can easily cope with maintenance-free operation, and is extremely advantageous economically.
[0026]
By the way, the air 17 that has passed through the drum filter 13 is removed from the oil mist and solid matter, becomes clean air 22 and enters the inside of the rotary rotor 12. Go out to. When clean air 22 exits the rotary rotor 12, an airtight seal mechanism 18 (more specifically, a seal portion 18 c formed of oil) exists between the rotary rotor 12 and the exhaust port 20. There is no worry that the air 17 containing the oil mist is mixed with the clean air 22. Therefore, the clean air 22 is not mixed with the air 17 containing oil mist and can be exhausted while maintaining a high cleanliness. Even when the drum filter 13 is washed by the spray nozzle 23, oil mist and solid matter adhering to the drum filter 13 are dropped from the rotary rotor 12 toward the casing 11, so that the inside of the rotary rotor 12 is always highly clean. You can keep the degree.
[0027]
Furthermore, in the first embodiment, the air 22 in the rotary rotor 12 can be forcibly exhausted by the exhaust fan 21. For this reason, even if the drum filter 13 rotates with the rotary rotor 12 at a high speed, the air 22 can be reliably exhausted from the exhaust port 20 against the centrifugal force. In addition, by adjusting the capacity of the exhaust fan 21, intake from a desired position and exhaust to a desired position can be performed.
[0028]
Further, in the first embodiment, strong alkaline water 26 is used as the cleaning liquid for the drum filter 13, but the drainage tank 25 is mixed with the electrolytically strong alkaline water 26 and the electrolytically strong acidic water 27 for the drainage. Neutralized and drained as neutral drainage 28. Also in terms of such drainage, it can exhibit excellent environmental harmony and is suitable as an environment-conserving device. In addition, since the electrolyzed alkaline water 26 returns to neutral if exposed to air as it is, there is no persistence and safety is high. Further, the electrolytically strong alkaline water 26 having a strong detergency has the advantage that the amount of the cleaning liquid used can be suppressed, and the cost can be reduced. Moreover, since the spray nozzle 23 in the first embodiment ejects the electrolytically strong alkaline water 26 intermittently, the amount of the cleaning liquid used can be reduced in this respect as well. Further, by reducing the cleaning liquid, it is possible to suppress moisture contained in the exhaust from the oil mist removing apparatus, and it is possible to prevent indoor humidity from being increased and production equipment and products from being rusted.
[0029]
(2) Second Embodiment [Configuration]
The second embodiment corresponds to the invention of claim 4, FIG. 5 is a sectional view of the second embodiment, and FIG. 6 is a plan view of the same. The feature of the second embodiment is that the blower 21 is removed from the exhaust port 20 and the blower 16 is connected to the intake port 15. An air inlet 16 a is formed in the blower 16, from which air 17 including oil mist is sucked and air that forms a swirling flow is sent to the drum filter 13. The same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0030]
[Function and effect]
According to the second embodiment as described above, in addition to the operational effects of the first embodiment, the inside of the casing 11 can be set to a positive pressure, and a back pressure can be applied to the drain port 19. It becomes. Therefore, it becomes easy to collect the liquefied oil mist.
[0031]
(3) Other Embodiments The present invention is not limited to the above-described embodiments, and the shape and the number of arrangement of each constituent member can be appropriately changed. Regarding the arrangement of the intake port 15 and the exhaust port 20, the intake port 15 sends air 17 containing oil mist from the outside to the inside of the rotating member, and the exhaust port 20 takes out clean air 22 from the inside of the rotating member. If so, for example, the casing 11 may be arranged horizontally as shown in FIG. Further, the shape of the rotating member is not limited to a cylindrical shape like the rotating rotor 12, and a spherical shape or the like can be appropriately selected as long as the oil mist and the solid matter are separated by centrifugal force. Furthermore, it is also possible to attach both the blower 16 and the exhaust fan 21 to the casing. In addition, the present invention relates to an oil mist removing device, but the object to be removed also contains dust equivalent to the oil mist and can be used as an air cleaning device for removing dust from the air. It is.
[0032]
【Effect of the invention】
As described above, according to the present invention, the cleaning liquid is sprayed onto the filter in which air containing oil mist is fed from the outside to the inside of the filter and the filter on which highly viscous oil mist and solid matter are deposited. By cleaning the filter, it is possible to easily realize maintenance-free by avoiding clogging of the filter, and to provide a high-performance and low-cost oil mist removing device.
[Brief description of the drawings]
FIG. 1 is a sectional view of a first embodiment according to the present invention.
FIG. 2 is a plan view of the first embodiment.
FIG. 3 is a perspective view of a drum filter according to the first embodiment.
FIG. 4 is an enlarged cross-sectional view of an airtight seal mechanism in the first embodiment.
FIG. 5 is a sectional view of a second embodiment according to the present invention.
FIG. 6 is a plan view of a second embodiment.
FIG. 7 is a sectional view of another embodiment of the present invention.
FIG. 8 is a schematic view of a conventional centrifugal rotation type oil mist removing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,11 ... Casing 2,13 ... Drum filter 3,17 ... Air containing oil mist 12 ... Rotary rotor 15 ... Intake port 16 ... Blower 18 ... Airtight seal mechanism 18a, 18b ... Metal plate 20 ... Exhaust port 21 ... Exhaust air 22 ... Clean air 23 from which oil mist has been removed ... Spray nozzle 24 ... Electrolyzed water generator 25 ... Drain tank 26 ... Electrolyzed alkaline water 26a ... Alkaline water piping 27 ... Electrolyzed acidic water 27a ... Acidic water piping 28 ... Neutral waste water

Claims (5)

In the casing, an intake port for taking air containing oil mist into the casing,
An exhaust port for taking out clean air from which oil mist has been removed to the outside of the casing is disposed,
A rotating member having a space inside is accommodated in the casing,
The rotating member is equipped with a filter that collects oil mist while allowing air to pass through,
A centrifugal force is generated by the rotating operation of the rotating member, and the oil mist collected by the filter by the centrifugal force is separated from the filter,
In the oil mist removing apparatus configured to collect this,
The intake port is disposed in the casing so as to send air containing oil mist from the outside to the inside of the rotating member,
The exhaust port is arranged in the casing so as to take out clean air from the inside of the rotating member,
A spray nozzle for injecting a cleaning liquid toward the inner surface side of the filter is installed inside the rotating member,
An electrolyzed water generator for generating electrolyzed alkaline water and electrolyzed acidic water is provided,
An alkaline water pipe for supplying the electrolytically strong alkaline water to the electrolytic water generator;
An acidic water pipe for supplying the electrolytically strong acidic water is disposed;
The spray nozzle is connected to the alkaline water pipe;
In the casing, a drainage pipe for flowing the drainage of the cleaning liquid is disposed,
An oil mist removing apparatus, wherein the acid water pipe is connected to the drain pipe.   The oil mist removing apparatus according to claim 1, wherein an airtight seal mechanism is provided between the exhaust port and the rotating member.   The oil mist removing apparatus according to claim 1 or 2, wherein an exhaust fan is connected to the exhaust port.   4. The oil mist removing device according to claim 1, wherein a blower is connected to the intake port.   5. The oil mist removing apparatus according to claim 1, wherein the spray nozzle is configured to intermittently eject the cleaning liquid.

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