KR20070115265A - Apparatus for condensation oily vapor - Google Patents

Abstract

An apparatus for condensing oil-vapor is provided to recover only oil from oil-vapor, send oil into an oil storage tank and discharge only air to the outside. An apparatus for condensing oil vapor includes a filter housing(100) and a filter(200). The filter housing(100) has a predetermined space in the shape of a hollow. The filter housing(100) has a oil-vapor inlet and an oil-vapor outlet having an anti-backflow valve. The filter housing(100) has the second end formed with a vent hole. The filter(200) includes a plurality of filters and a finish material formed at the side surface of the filter. The finish material is used to adhere to the filter and seal the filter. The apparatus includes a plate-type separator interposed between the outlet and the vent hole of the filter housing(100) and has the first side formed with a passage.

Description

Steam Apparatus {apparatus for condensation oily vapor}

1 is a partial cutaway perspective view of the present invention, the vapor coagulation device,

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1;

3 is a cross-sectional view of the vapor condensation apparatus provided with a boundary membrane,

4 is a cross-sectional view showing an embodiment of the present invention;

Figure 5 is an assembled perspective view showing another embodiment of the present invention,

Figure 6 is a perspective view of the present invention, the vapor condensing device,

7 is a cross-sectional view taken along the line B-B 'of FIG.

8 is a state of use of the present invention vapor coagulation apparatus.

<Description of the symbols for the main parts of the drawings>

10,10 ': Oil vapor flocculation device 20: Oil storage tank

30: vapor outflow pipe 40: vapor recovery unit

100: filter housing 110: oil outlet

111: non-return valve 120: vent

130: oil vapor inlet 140: hollow portion

200: filter portion 210: finishing material

220: ceramic filter 230: paper filter

240: non-woven filter 250: porous filter

260: moving hole 300: boundary membrane

310: oil passage 400: upper plate

410: discharge pipe 420: through hole

The present invention relates to a vapor condensing device that can efficiently manage the vapor in a simple configuration, when discharging the vapor generated in the oil storage tank through the vapor outflow pipe to the outside, provided with a filter inside the end of the vapor outflow pipe The oil vapor is collected and sent to an oil storage tank as a vapor coagulant is installed and the oil vapor is collected and sent to an oil storage tank.

In general, in a gas station or a large factory that uses a large amount of oil, an oil supply device is provided, and an oil storage tank for receiving and storing oil from an oil supply device, such as a conventional oil supply amount, is provided at the same time. Oil is supplied through the connected oil supply pipe.

The oil in the oil storage tank generates the oil vapor as much as the amount of oil used due to its volatility, and the oil vapor generated as described above is discharged to the outside through the oil vapor outflow pipe to act as the main culprit of air pollution. When all the oils in the tank are used and the oil is filled into the oil storage tank again, the oil vapor filled in the oil storage tank is simultaneously discharged to the outside, where the amount of oil vapor discharged to the outside of the oil storage tank is equal to the volume of the newly supplied oil. Therefore, when a large amount of oil vapor is discharged and the oil vapor is discharged to the outside, it becomes a main contaminant to pollute the air, and economic losses are also caused according to the amount of vapor vaporized.

The present invention relates to an oil vapor recovery apparatus that can efficiently manage oil vapor generated in an oil storage tank in order to solve the problem of oil vapor treatment as described above, and to an oil vapor recovery device that recovers oil vapor in an oil tank to an oil recovery amount. A hollow body formed in a “T” shape, upper and lower fastening portions respectively formed at upper and lower ends of the body so that the oil tank side upper and lower pipes can be respectively fixed through nut coupling, and a central end of the body; The central fastening part to which the hollow connection part is fastened so that the oil quantity side hose can be coupled to the upper part of the body, and is installed in the upper fastening part of the body, and corresponds to the horizontal valve device on the central fastening part side, and the oil vapor path to the atmosphere through Shanghai East. Vertical valve device for opening and closing the valve, and is installed in the central fastening portion of the body, the front and rear movement by the coupling of the oil flow side hose It consists of a horizontal valve device for opening and closing the oil vapor path to the recovery tank through, and a sealing ring installed between the upper and lower fastening portion and the upper and lower pipes on the oil tank side to prevent the leakage of oil vapor, thereby to generate the oil pressure generated in the oil tank. By implementing a more accurate mechanical operation than the conventional steam recovery device that was operated through the oil vapor generated in the oil tank is not discharged to the atmosphere can be recovered in the oil recovery amount of the tank to prevent air pollution, in particular the vapor recovery device The upper and lower fastening parts in the form of male threads for fastening nuts are formed on the upper and lower parts of the oil outlet without any additional work on the steam discharge pipe installed to contact the atmosphere from the oil tanks underground. Korea Patent Registration 10-0515729 is provided with excellent effect that can be installed and used Although the shape of the bar is very complicated, the failure of the device frequently occurs, and there is a problem of adding an economic burden to the user as the manufacturing cost increases, and there is a limit in the recovery of harmful and other oil components, which results in ultrafine gas. There is a big problem that can not efficiently recover the vapor, such as polluted air by the vapor while being discharged as it is not recovered.

The present invention is to solve the above problems, when discharging oil vapor generated in the oil storage tank to the outside by moving the pipe, equipped with an oil vapor agglomeration apparatus equipped with a filter inside the pipe end to filter the oil vapor According to this, the oil component is recovered and sent to the oil storage tank, and the clean air from which the oil component is removed by the filter is discharged to the atmosphere so that the oil vapor generated in the oil tank is not discharged to the atmosphere, and only the oil component is collected and recovered into the oil storage tank. It can prevent air pollution and save energy.

In addition, the vapor condensing device configured as described above can be installed in all of the oil vapor outflow pipes installed in the longitudinal or transverse direction to enable the binding in multiple directions, to achieve the maximum vapor recovery efficiency with a minimum configuration. There is this.

In order to achieve the above object, the present invention is connected to an oil storage tank to recover oil vapor, and clean air separated from oil vapor is provided with a predetermined space portion therein in a hollow shape, One side is open and has an oil vapor inlet to allow entry and exit from the outside, an oil outlet having a backflow prevention valve formed therein, a filter housing having an air vent at the other end, and between the air vent and the vapor inlet of the space part. Provided is a vapor condensation apparatus comprising a plurality of filters filled in the cross-sectional shape of the space portion, and a filter portion made of a finish formed on the side of the filter for adhering and sealing the filter.

The present invention also provides an oil vapor condensing device, which is formed between the oil outlet of the filter housing and the air vent, and has a plate-shaped boundary membrane that forms an oil passage on one side.

In addition, the filter unit is formed to form a hollow inside to surround the hollow portion, the hollow portion is connected to the oil vapor inlet provides an oil vapor agglomeration apparatus characterized in that the oil vapor is mixed.

In addition, the filter unit is provided with a plurality of discharge pipes protruding upwards on the front side of the vent side and an upper plate having a through hole on one side, the filter unit having a moving hole to correspond to the through hole, the through hole and the moving hole is oil Provided is a vapor condensing device, characterized in that connected to the outlet in a straight line.

In addition, the filter is composed of a ceramic filter, a paper filter, a nonwoven fabric filter, and a porous filter, and the ceramic filter, the paper filter, the nonwoven fabric filter, and the porous filter in order from the oil vapor inlet side in order of high filtration efficiency. Provided is a vapor condensation apparatus, characterized in that laminated in the order of.

Hereinafter, the configuration and effect of the present invention according to the accompanying drawings in more detail.

Figure 1 is a partial cutaway perspective view of the present invention, the vapor coagulation apparatus, Figure 2 is a cross-sectional view taken along line AA 'of Figure 1, Figure 3 is a cross-sectional view of the vapor coagulation apparatus equipped with a boundary membrane, Figure 4 is an embodiment of the present invention 5 is an assembled perspective view showing yet another embodiment of the present invention, Figure 6 is a perspective view of the present invention, the vapor coagulation apparatus, Figure 7 is a cross-sectional view taken along line B-B 'of Figure 6, 8 is a state diagram of use of the present invention vapor coagulation apparatus.

As shown in FIG. 1, the present invention, the vapor condensing device 10, 10 ′ is composed of a filter housing 100 and a filter part 200.

The filter housing 100 is provided in a hollow shape with a predetermined space portion therein, and has an oil vapor inlet 130 so that one side is open and accessible from the outside, and has a non-return valve 111 at one end thereof. According to the cross-sectional shape of the oil vapor outlet pipe 30 so as to form an oil outlet 110, the other end is provided with a vent 120, and can be connected to the oil vapor outlet pipe 30 provided in the oil storage tank (20) It may be provided in a circular or square or other shape, the filter housing 100 can be modified in the form of an open top, in this case is provided with a separate upper cover foreign matter is introduced into the filter housing 100 from the outside To prevent them.

The material of the filter housing 100 is not particularly limited, but a metal material or synthetic resin having a low responsiveness to air or moisture may be used to maintain its shape for a long time without rust, and since the pipe is cylindrical, the filter housing 100 ) Is also provided in a cylindrical shape and is provided in various sizes so that it can be directly connected to the vapor discharge pipe 30 directly, and the sealing part is connected to the connection of the vapor discharge pipe 30 and the vapor coagulation device (10, 10 '). And, having a locking step integrally extended to the lower end of the cylindrical filter housing 100 can be changed into various forms such as different diameters of the top and bottom or to show the bent shape of the cross section. to be.

The oil outlet 110 may be integrally formed to be integrally extended at one side upper end of the filter housing 100 to allow entry and exit of the filter housing 100, or may be provided therein, and the interior of the oil outlet 110 may be It is provided with a diameter smaller than the diameter of the filter housing 100, and is provided with a non-return valve 111 therein.

The oil outlet 110 is the unfiltered oil component remaining in the filtered gas by the filter unit 200 condenses itself by reacting with the outside air, and when extracted by liquefaction, the condensed oil component is evaporated. It functions as a passage for transferring to the oil storage tank 20 for reuse without being discharged to the outside, and is provided with a separate connection pipe and connected to the oil storage tank 20 through the connection pipe to condense and extract itself. The oil component of the may be transferred to the oil storage tank 20, or may be transferred to the oil storage tank 20 in connection with the oil vapor outlet pipe (30).

The structure as described above is to allow the present invention the vapor condensing device 10 is installed in the horizontal direction through the three-way valve or the vapor recovery device 40 of the type, such as shown in Figure 8, the oil storage tank 20 When the oil vapor outlet pipe (30) connected in the horizontal direction is installed, the oil vapor agglomeration apparatus 10 is installed at the end thereof, but the oil outlet 110 is installed at the lower end so that the liquid oil component in its own weight By the oil outlet 110 connected to the oil storage tank 20 to be exited.

The non-return valve 111 is positioned between the oil storage tank 20 and the oil outlet 110 so as to be movable only in one direction. The oil component in the liquid state is connected to the oil storage tank 20 by its own weight. Out of the outlet 110 to be transported to the oil storage tank 20, the oil vapor in the oil storage tank 20 is moved to the oil vapor inlet 130 is not filtered in the filter unit 200 to the oil outlet 110 It is to prevent the discharge by.

The non-return valve 111 includes a housing having a flow path formed therein and a valve seat provided on the flow path, and a valve body that opens and closes the flow path while being in close contact with or spaced from the valve seat. Can be used.

The vent 120 may be integrally formed at the other end of the filter housing 100 at a lower end than the oil outlet 110 or may be formed as a whole and the inside thereof may have a diameter less than or equal to the diameter of the filter housing 100. It is provided with, and configured to be able to enter and exit the inner space portion of the filter housing 100.

The vent 120 serves as a passage through which oil components remaining in the gas components filtered by the filter are condensed and the clean air remaining without condensation is discharged to the outside of the filter housing 100. When the oil vapor outlet pipe 30 is installed horizontally, at the end of the oil vapor outlet pipe 30, the vent 120 is located at the top, the oil outlet 110 is installed at the lower end of the vapor coagulation apparatus 10 is installed The relatively light clean air is to escape to the outside of the vapor condensation apparatus 10, and the oil component condensed in the liquid state is to be transferred to the oil storage tank 20 through the oil outlet 110 provided at the bottom.

In addition, since the vent 120 is exposed to the atmosphere, foreign matter may enter, and thus may further include a separate cover.

The cover is installed to surround the vent 120 in an annular shape having a 'b'-shaped short life bent twice, the gas can be covered with various types of cover to prevent the introduction of foreign matter.

The filter unit 200 is formed by forming a plurality of filters in the longitudinal direction at the lower end of the vent of the space, and by treating the side surface of the filter with a finishing material 210 in order to adhere and seal the filter, the filter housing 100 It is provided between the inner surface and the filter unit 200 to filter the oil vapor. The oil component of the oil vapor is filtered to flow down into the liquid state to be collected in the oil storage tank 20, and the other air components are filtered and discharged into the atmosphere. It is possible to use various kinds of filters to discharge through the post treatment and to increase the filtration efficiency of oil vapor.

The filter unit 200 is configured at the bottom of the vent 120 of the space of the filter housing 100, so that oil vapor introduced into the filter housing 100 can be filtered by the filter unit 200 without being immediately discharged, and the filter Sealing is performed between the inner surface of the housing 100 and the filter part 200. The sealing method is to press-fit a gasket made of rubber or an elastic material, or to melt the adhesive to completely seal the joint and to melt and seal the silicon. By removing the gap between the inner surface of the filter housing 100 and the filter unit 200 by the sealing operation as described above, all the vapor is filtered without the oil vapor transferred through the oil vapor outlet pipe 30 to the gap. It can be filtered to the portion (200).

The oil vapor inlet 130 is provided at the bottom of the filter housing 100 so as to form a predetermined space with the filter unit 200. The shape or size of the oil vapor inlet 130 is formed at a lower end according to the shape of the filter housing 100. Each may be provided differently, and the space between the filter unit 200 and the space is to allow the oil vapor transferred to the oil vapor outlet pipe 30 to be diffused in the space and evenly introduced into the filter unit 200. It does not have a separate vapor inlet 130, because the lower end is itself open shape can be used directly connected to the vapor outlet pipe 30, and when directly connected to the filter unit 200 and a predetermined distance The oil component filtered and filtered by the filter unit 200 is moved to the oil storage tank through the oil vapor inlet 130 and the oil vapor outlet pipe 30.

In addition, the present invention is a plate-shaped boundary membrane 300 is formed between the oil outlet 110 and the vent 120 of the filter housing 100, as shown in Figure 3 to form an oil passage 310 on one side surface It is characterized by comprising:

The boundary membrane 300 is stagnated by the boundary membrane 300 without the gas component filtered by the filter immediately exiting the oil outlet 110, the remaining oil component is condensed, the gas component through the vent 120 In order to escape to the outside, the oil vapor filtered by the filter unit 200 is stagnated between the boundary membrane 300 and the filter unit 200 so that the oil component is condensed by itself, the oil by the filter The clean air from which the components have been removed is intended to escape to the vent 120 provided above.

In addition, as shown in FIG. 4, the filter part 200 is filled to form a hollow part 140 therein at a predetermined distance from the filter housing 100 in an open shape on one side, and the hollow part. 140 provides a vapor condensing device 10, characterized in that the vapor is mixed.

As the filling method of the filter, various methods may be used, and as described above, a plurality of rectangular filters may be stacked in the longitudinal direction, and the hollow part 140 may be formed therein to introduce the oil vapor introduced into the hollow part ( 140 may be filled so as to surround the hollow portion 140 so that the introduced oil vapor can be diffused and filtered in all directions, it can be repeatedly filled, multiple types of filters used have.

The hollow part 140 is connected to the vapor inlet 130, and since the filter surrounds the outside of the hollow part 140, the contact area between the vapor and the filter part 200 increases, and thus the filter is filled in the longitudinal direction to have a cross section only. It is possible to filter a large amount of steam in the same time than when filtering, thereby improving the treatment efficiency of the steam.

The reason for placing a predetermined distance between the filter filled to surround the hollow part 140 and the inner wall of the filter housing 100 is that oil vapor filtered through the filter part 200 is transferred to the upper end of the filter housing 100 to filter the filter. The clean air from which the oil component is removed by the exhaust air is discharged to the vent 120, and the oil component condensed by itself is separated to the oil outlet 110 of the filter housing 100.

In addition, the present invention is provided with a plurality of discharge pipes 410 protruding vertically upward, the upper plate 400 having a through hole 420 on one side is formed on one side of the filter unit 200, the through hole 420 ) Is characterized in that connected to the oil outlet (110).

The upper plate 400 includes a plurality of discharge pipes 410 in the vertical upward direction, and the gas component filtered by the filter unit 200 does not immediately exit the air vent 120, but the discharge pipe 410 of the upper plate 400. Only to be discharged to the discharged through the discharge pipe 410, the oil component is condensed by itself flows down to the liquid phase through the outer surface of the discharge pipe 410, clean air is immediately discharged to the vent 120, The oil component condensed into the liquid phase and extracted to the outer surface of the discharge pipe 410 is accumulated between the discharge pipe 410 and the discharge pipe 410.

The through hole 420 is moved to the through hole 420 when the oil component extracted along the outer surface of the discharge pipe 410 is a predetermined amount, and the inside of the filter housing 100 along the moving hole 260 of the filter unit 200. It is transferred to the oil storage tank 20 along the oil outlet 110 provided in the

The through hole 420 serves as a passage for transferring to the oil storage tank 20 and the through hole 420 is provided with a separate moving pipe and connected to the vapor outflow pipe 30 through the moving pipe through the through hole 420. The oil component transferred through the oil can be transferred to the oil storage tank 20. In this case, a separate backflow prevention valve is provided in the moving pipe so that the oil vapor of the oil storage tank 20 is not filtered by the filter and exits the moving pipe. Prevent release to the atmosphere.

5 to 6 as described above, the vapor coagulation apparatus 10 of the present invention to be installed in the longitudinal direction, the end of the vapor discharge pipe 30 configured in the longitudinal direction as shown in Figs. ') Is installed, but the oil vapor inlet 130 and the oil vapor outlet pipe 30 is coupled to the joint portion is configured to seal, the condensed oil components are transferred to the oil storage tank 20, clean air to the vent 120 The vent 120 may be provided with a separate cover to prevent the gas from being discharged and foreign substances from being introduced from the outside.

In addition, the present invention can be applied to the conventional vapor recovery apparatus 40 to enable the entry and exit in three directions, such as Republic of Korea Patent Registration 10-0358432.

The vapor recovery device 40 is connected to the T-type connector, attached to the present invention vapor condensing device (10 ') equipped with the present invention, the vapor vapor condensing device provided with a filter, the vapor vapor recovery vehicle, without the vapor recovery vehicle itself The oil component is filtered to transfer to the oil storage tank 20, and the clean air from which the oil component is removed by the filter is discharged to the outside.

In addition, in the present invention, the filter unit 200 is composed of a ceramic filter 220, a paper filter 230, a nonwoven fabric filter 240, a porous filter 250, in order of high filtration efficiency oil vapor The ceramic filter 220, the paper filter 230, the nonwoven filter 240, and the porous filter 250 are sequentially stacked from the inlet 130.

The ceramic filter 220 is a material having a filtration efficiency of 1 / 10000mesh, manufactured by using chamotte and clay as main constituents, and as a micro filter, which is made of suspended solids or particulates with very precise pores. The foreign substance is removed, and the general ceramic filter 220 is also used for filtration of liquid and includes ceramic porous bodies such as alumina and silica having good corrosion resistance.

The ceramic filter 220 is a slurry of 60 to 75 parts by weight of chamotte, 10 to 15 parts by weight of alumina cement, 13 to 23 parts by weight of clay, 2 to 10 parts by weight of lignite and 1 to 3 parts by weight of methyl cellulose (MC). The composition is filled into a centrifugal molding mold and centrifuged at 500 to 1200 rpm for 5 to 15 minutes, and the finished sample is separated from the centrifugal molding mold after natural drying for 24 hours, and the separated sample is separated at 20 ° C to 25 ° C. After drying completely for 48 hours, a known ceramic filter 220 such as a porous ceramic filter, which is calcined for 2 hours in an electric furnace at 1300 ° C. to 1550 ° C., is used.

A plurality of paper filters 230 are stacked to filter oil vapor filtered by the ceramic filter 220. The paper filter 230 refers to a porous paper used for filtering and selecting precipitates and impurities present in the liquid. It is also called vulgaris, and it is porous, soft and low in ash. It is resistant to water and various solvents, resistant to acids and alkalis, contains no inorganic substances, and requires homogeneity of each chapter. Therefore, unlike ordinary paper or pulp, it contains no pectin, lead, fats, fats, proteins, or inorganic substances, and no paste or size agent is used, and purified cotton, purified rags, and bleached chemical pulp are used as raw materials. If used, the cotton is purified and steamed under high pressure with sodium carbonate solution, dissolved in impurities and washed with water, then removed with unsuitable fibers with a selector, floated with paper, frozen with moist fibers to destroy cells,細孔) make water, and then dry it naturally to become a paper filter.To remove the inorganic matter, treat it with hydrofluoric acid and hydrochloric acid before drying and then wash it with distilled water, and then treat it with quantitative paper filter and nitric acid. It is called hard paper filter and is used for qualitative analysis or qualitative filtration of manufacturing chemistry. 3-10 mothamyeo relatively large and also by uneven × 10 ^-3 mm, ash content is also not constant not obsolete, the quantitative analysis, quantitative filter paper 230, and the ash content per unit area is represented by the figure, perforated also relatively goreumyeo, 6 There are various types ranging from × 10 ^-4 mm to 1.5 × 10 ^-3 mm, and 4-10 cm in diameter, and 2 cm butterfly and 40-50 cm in length for paper chromatography. The paper filter 230 is also used to penetrate various indicators and reagents to make various test papers.

Like the paper filter 230, the nonwoven filter 240 is laminated in plural and is one of coating materials. The nonwoven filter 240 is made of felt by arranging fibers in parallel or in an opposite direction and combining them with a synthetic resin adhesive without going through a woven fabric process. At the beginning, synthetic fibers such as cotton, viscose rayon, and nylon were also used. The processing method is immersion and dry, and the immersion method is also called papermaking. The fibers are soaked in a synthetic resin adhesive container and dried and heat-treated. It is similar to paper, and dry means that the fiber is made of thin cotton and spouted with synthetic resin and dried by heating.

In addition, the porous filter 250 is located at the top of the ceramic filter 220, the paper filter 230, and the non-woven fabric filter 240 is laminated, respectively, the filtration of the oil vapor is completed outside the filter unit 200 Discharge to and maintains the shape of the filter unit 200 or serves to protect and support from external impact.

The porous filter 250 may be used in a variety of ways, but the ceramic filter 220, the paper filter 230, In order to diffuse the gas component filtered by the nonwoven fabric filter 240, the filter unit 200 is laminated as described above to form a solid adhesive layer on the side portion in order to make the construction more robust, more easy to finish It can be finished by melting or using a separate finish material.

The present invention is not limited to the above-described specific embodiments, and those skilled in the art to which the present invention pertains may make various modifications without departing from the gist of the invention as claimed in the claims, and Such changes are within the scope of the claims.

In the present invention as described above, when discharging the oil vapor generated in the oil storage tank to the outside through the pipe-shaped oil vapor outflow pipe, the oil vapor recovery device equipped with a filter at the end of the oil vapor outflow pipe to filter the oil vapor Accordingly, the oil components are recovered and sent to the oil storage tank, and the clean air from which the oil components have been removed by the filter is discharged to the atmosphere so that the oil vapor generated in the oil tank is not discharged to the atmosphere, and only the oil components are collected separately and recovered to the oil storage tank. As a result, air pollution can be prevented, energy can be saved, and exhaust pipes installed in the longitudinal or transverse direction can be installed to facilitate binding, and the maximum amount of vapor recovery is possible with a minimum configuration. It is a very useful invention to realize efficiency.

Claims (5)

In the device that is connected to the oil storage tank to recover the oil vapor, and the clean air separated from the oil vapor to the outside,  It is provided with a predetermined space portion inside the hollow shape, having one side is open and having an oil vapor inlet to allow entry and exit to the outside, an oil outlet having a backflow prevention valve therein is formed, and the other end is provided with a vent Filter housings; A filter portion comprising a plurality of filters filled in a cross-sectional shape of the space portion between the air vent and the vapor inlet of the space, and a finish formed on the side of the filter to seal and seal the filter; Steam agglomeration apparatus, characterized in that consisting of. The vapor condensing apparatus according to claim 1, further comprising a plate-shaped boundary membrane formed between the oil outlet of the filter housing and the air vent, and forming an oil passage on one side. The apparatus of claim 1, wherein the filter part is formed to form a hollow part to surround the hollow part, and the hollow part is connected to an oil vapor inlet to mix oil vapor. According to claim 1, A plurality of discharge pipes protruding upwards on the front side of the vent side of the filter portion and an upper plate having a through hole on one side, The filter unit is provided with a moving hole to correspond to the through hole, The moving hole is a vapor condensing device, characterized in that connected to the oil outlet in a straight line. 2. The filter according to claim 1, wherein the filter comprises a ceramic filter, a paper filter, a nonwoven fabric filter, and a porous filter, in order from the oil vapor inlet side in order of high filtration efficiency, the paper filter, the nonwoven fabric filter, , The vapor condensing device, characterized in that laminated in the order of the porous filter.

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