JP2006297363A - Method and device of separating foreign matter from compressed air - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device capable of sufficiently contacting compressed air and an oil adsorbent material for definitely catching foreign matter such as oil mist contained in the compressed air. <P>SOLUTION: In the method for separating the foreign matter from the compressed air, the system is configured by allowing the compressed air to always contact the oil adsorbent material 55 while allowing the compressed air to pass through cylindrical oil adsorbing tanks 50, 60, 80 filled with the material 55 for catching the oil mist contained in the compressed air and allowing the compressed air flows to advance inside oil adsorbing chambers of the oil adsorbing tanks. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a foreign matter separation method and a foreign matter separation device for separating foreign matter from compressed air. More specifically, the present invention relates to a reliable method, at the same time, in a simple manner and in an inexpensive form, and further with pressure. Describes the technology to determine whether foreign matter including oil mist can be separated from compressed air while considering loss and installation location.

  Conventionally, as a technique related to a foreign matter separation method and a foreign matter separation device that separates foreign matter from compressed air, a system that uses a mist filter instead of the oil adsorption tanks 50, 60, and 80 shown in FIG. The filter element 90 seen in FIG. 4 was configured as a mist filter.

  In this case, the filter element 90 having the purpose of capturing oil mist from the compressed air has a cylindrical glass fiber 92 disposed inside a plastic foam 93 whose outer shape is cylindrical, as shown in FIG. Further, a cylindrical pre-filter 91 is formed inside thereof.

  The prefilter 91 has a pleated structure to increase the filtration area, reduce pressure loss, and reduce the burden on the downstream glass fiber 92. Further, the glass fiber 92 has a structure of a plurality of layers (in FIG. 4, triple winding), and captures foreign matters of 0.01 μm or more while promoting aggregation of liquid particles. Further, although not specifically shown, a stainless steel screen is inserted between the prefilter 91, the glass fiber 92, and the plastic foam 93 to take into account the differential pressure.

  By the way, in this filter element 90, the compressed air containing foreign matter mainly in the oil mist is interrupted directly by the fibers in the compressed air flow 90a flowing from the center to the outside, or is removed from the flow by inertia. It is captured by colliding with the fiber or by colliding with the fiber by Brownian motion which is not related to the compressed air flow 90a as the particle size of the foreign matter is smaller. Therefore, in the filter element 90, the compressed air that has entered from the inside of the element constitutes the filter element 90 from the center. The prefilter 91, the inner screen, the glass fiber reinforcing cloth, the glass fiber 92, the glass fiber reinforcing cloth, The outer screen and the plastic foam 93 were sequentially passed to the outside of the element.

In this way, rust or the like having a relatively large particle diameter among foreign matters contained in the compressed air is captured by the prefilter 91 in the process of flowing from the center to the outside, and the foreign matter that has passed through the prefilter 91 is captured in the glass fiber 92. One after another, the fibers are caught and collided. At this time, solid particles are held on the surface of the fiber, but liquid particles such as oil mist form droplets. Furthermore, the droplets are combined with other droplets and gather at the bottom of the element due to their own weight, and the droplets collected at the bottom of the element are absorbed by the plastic foam 93 and become supersaturated, and then gradually reach the bottom of the filter container. It will fall.
“Machine Design” published by Nikkan Kogyo Shimbun (Vol. 41, No. 11, July 1997, separate volume)

  However, the foreign matter separating method and the foreign matter separating apparatus for separating foreign matter from such conventional compressed air have the following problems.

  First, the compressed air produced by recent air compressors is mostly oil-free due to the small amount of oil mist contained therein, and the need to remove oil mist has been reduced. Therefore, the demand for mist filters has been reduced.

  On the other hand, the oil-free air compressor is expensive when installed as a device, and the maintenance cost is higher than that of a normal air compressor.

  On the other hand, regarding the capture of the oil mist by the mist filter, in the process of flowing from the center of the filter element 90 to the outside, it collides with the glass fiber 92 and agglomerates to form droplets, and further combines with other droplets by its own weight. Although gathered at the bottom of the element, the glass fiber 92 that captures the most oil mist is about 7 to 8 layers although it is said to be a plurality of layers. In addition, when the function deteriorates, it has become prominent that it is not captured.

  In this case, if the number of the glass fibers 92 is increased from 3 layers to 7 to 8 layers in some cases, the processing capability is improved. However, considering the shape of the cylindrical filter element 90 flowing from the center to the outside, the size is simply increased. There was a limit.

  The present invention relates to a foreign matter separation method for separating foreign matter from compressed air, and a cylindrical oil adsorption filled with oil adsorbents 55, 71 and 88 for capturing oil mist contained in the compressed air. By passing through the tanks 50, 60, 80, the oil adsorbent is always provided while the compressed air travels through the oil adsorption chambers 50a, 60a, 80a at least in the length direction of the cylinder in the oil adsorption tanks 50, 60, 80. 55, 71, 88, and the oil adsorbents 55, 71, 88 are fibers, activated carbon, and sawdust from a nonwoven fabric of polypropylene or polystyrene, Immediately before oil mist is captured by the oil adsorbing materials 55, 71, 88, water and dust are removed in the vicinity of the oil adsorbing tanks 50, 60, 80, and the oil adsorbing chambers 50a, 60 , The length of 80a, by which is a 10～800Cm, it was to solve the above problems.

  Further, in the foreign matter separating apparatus for separating foreign matter from compressed air, the present invention has a cylindrical shape of the oil adsorbents 55, 71 and 88 made of fibers containing nonwoven fabric for the purpose of capturing oil mist contained in the compressed air. The oil adsorption chambers 50a, 60a, 80a forming the oil adsorption tanks 50, 60, 80 are filled, and the oil adsorption chambers are compressed in the length direction of at least the cylinders of the oil adsorption tanks 50, 60, 80. The oil adsorbents 55, 71, and 88 are always in contact with the oil adsorbents 55, 71, and 88 while traveling through the oil adsorbers 50, 60a, and 80a. Further, the entrances 51a, 51b, 61a, and 61b of the oil adsorbing tanks 50, 60, and 80 are used. , 85a, 84b and the oil adsorbing chambers 50a, 60a, 80a, spaces 51x, 51y, 61x, 61y, 80x, 80y are formed for the purpose of flowing compressed air uniformly. in front The oil adsorbing tanks 50, 60, and 80 have a volume of at least 0.2 to 1000 liters, and the oil adsorbing tank 150 has a circular or polygonal diameter or a longest length forming a cross section. The ratio of the diagonal line or the longest side of the oil to the total length of the passage distance of the oil adsorbing chamber 50a filled with the oil adsorbing material 55 is 1: 2 to 1:20. In the adsorption tank 60, an inner cylinder 67 having a smaller cross section than the outer cylinder 64 is positioned inside the outer cylinder 64 which is sealed in a cylindrical shape, spaced from the outer cylinder 64, and one end of the inner cylinder 67 is connected to the outer cylinder 64. The inner cylinder 67 is fixed to the upper plate 61 positioned at one side of the inner cylinder 67 and the other end of the inner cylinder 67 communicates with the inner side and the outer side of the inner cylinder 67 on the lower plate 62 side positioned at the other side of the outer cylinder 64. A passage 67z is formed so that the upper plate 61 has dirty compressed air. The two inlet / outlet ports 61a and 61b through which clean compressed air is discharged are formed, and the inside of the inner cylinder 67 and the outer side of the inner cylinder 67 and the outer cylinder 64 between the two inlet / outlet ports 61a and 61b are formed. The oil adsorbing material 71 is housed in the oil adsorbing chamber 60a in between, the dirty compressed air is introduced into one of the two inlets 61a and 61b, and the other is clean compressed air, Further, the oil adsorption tanks 50, 60, 80 are arranged in a plurality of series in series, a plurality of sets in parallel, or a plurality of both in series and in parallel. Further, the oil adsorption tanks 50, 60, 80, A dust removing filter 40 that removes dust and an air dryer 20 that removes moisture are disposed upstream of 80, and the dust removing filter 40 and the oil adsorption tanks 50, 60, 80 are integrated into an integrated oil adsorption tank 150, 160, 18 The above-described problem has been solved by using 0 as a feature.

  As is clear from the above description, the present invention can provide the following effects.

  First, by passing through a cylindrical oil adsorption tank filled with an oil adsorbent for capturing oil mist contained in the compressed air, the compressed air is separated from the radial direction in the oil adsorption tank. Foreign material centered on oil mist, especially by ensuring 10 to 800 cm as the length of the oil adsorbing chamber by being always in contact with the oil adsorbing material while traveling through the oil adsorbing chamber in the length direction of the cylinder Can be reliably captured.

  Secondly, regarding the oil adsorption tank, the diameter of the circle or polygon forming the cross section of the oil adsorption tank can be described from another angle when the volume of the oil adsorption tank is 0.2 to 1000 liters. Also, the ratio of the longest diagonal line or the longest side to the total length of the oil adsorbing chamber filled with the oil adsorbent is 1: 2 to 1:20. It became possible to capture.

  Third, just before oil mist is captured by the oil adsorbing material in the oil adsorption tank, moisture and dust are removed in the vicinity of the oil adsorption tank, so that moisture and dust are generated again after capturing the moisture and dust. Concerns were completely relieved, and no further consideration was needed to install an air dryer or dust filter.

  Fourth, by configuring the dust removal filter and the oil adsorption tank as an integrated oil adsorption tank, a compact device in which the dust removal filter is always in close proximity to the oil adsorption tank is possible. Therefore, the consideration that a dust filter must be installed is completely unnecessary.

  Fifth, by forming a space for the purpose of flowing compressed air uniformly between the inlet and outlet of the oil adsorption tank and the oil adsorption chamber, the compressed air can flow without forming a specific flow path. As a result, the deterioration of the oil adsorbent is promoted uniformly in each cross section, and as a result, the life of the oil adsorbent becomes very long.

  Sixth, the oil adsorption tank has an inner cylinder whose cross section is smaller than that of the outer cylinder inside the outer cylinder sealed in a cylindrical shape, and is positioned at one end of the outer cylinder. The inner plate is fixed to the upper plate and the other end of the inner cylinder is formed with a passage so that the inner and outer sides of the inner cylinder can communicate with each other on the lower plate side of the outer cylinder. Two inlets and outlets for allowing air to flow in and discharging clean compressed air are formed, and the oil adsorbing material is stored in the oil absorbing chamber between the inner cylinder and the outer cylinder and the outer cylinder between the two inlets and outlets, By allowing dirty compressed air to flow in at one of the two ports and discharging clean compressed air on the other side, a compact, one-sided, stable oil adsorption tank is possible.

  Seventh, the oil adsorption tanks are arranged in series, in parallel, or in series and in parallel, so that the installation area, price, convenience of maintenance, maintenance costs, etc. are met. The device was made possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Here, FIG. 1 is the figure which showed the whole this invention, FIG. 2 is another figure of this invention oil adsorption tank, FIG. 3 is another figure of this invention oil adsorption tank. .

[First Example]
As shown in FIG. 1, reference numeral 10 denotes an air compressor. Although not specifically shown in FIG. 1, an air compressor that sucks the atmosphere 201 to generate compressed air, and an electric motor that rotates the air compressor. Is configured.

  Here, the compressed air produced by the air compressor constituting the air compressor 10 includes a compressed air pipe 111 for allowing the compressed air to flow out, an on-off valve 11 for manually opening and closing the flow of the compressed air, Compressed air piping 112, air dryer 20 for drying compressed air, compressed air piping 113, air tank 30 for storing compressed air, compressed air piping 114, and the flow of compressed air are manually opened or closed. On-off valve 31, compressed air piping 115, dust removing filter 40 for removing various foreign matters such as dust contained in compressed air, compressed air piping 116, and oil for removing mist contained in compressed air By passing through the adsorption tank 50 and the compressed air pipe 117, the dried beautiful compressed air 205 is removed from the air motor or air cylinder. It is possible to supply to the seed of the actuator.

  In this case, the air dryer 20 is considered to be a refrigeration type, but may be another type such as a membrane type or a desiccant. It should be noted that the drain water 202 generated by the dehydration of the compressed air by the air dryer 20 can be discharged through the drain water discharge pipe 221 and the open / close valve 25 that manually opens or closes the flow of the compressed air. It has become. Note that the air dryer 20 may be configured integrally with the air compressor 10.

  In addition, drain water 203 generated by dewing from compressed air in the air tank 30 can be discharged via a drain water discharge pipe 231 and an on-off valve 35 that manually opens or closes the flow of compressed air. It has become. Note that the air tank 30 may be configured integrally with the air compressor 10. Therefore, it is conceivable that the air compressor 10, the air dryer 20, and the air tank 30 are integrally formed.

  Further, the drain water 204 generated by dew condensation from the compressed air by the dust filter 40 can be discharged via the drain water discharge pipe 241 and the on-off valve 45 that manually opens or closes the flow of the compressed air. It has become.

  On the other hand, in the oil adsorption tank 50, the entrances and exits 51a and 51b are formed at both ends of the end of the cylindrical body 51 in the length direction, and the entrance and exit 51a is formed by a cylindrical ring-shaped fixing ring 53 having a smaller diameter than the body 51. , 51b and 51b are formed between the perforated plate 52 capable of passing the gas supported in the vicinity of 51b and the inlets / outlets 51a and 51b, and the two perforated plates 52 are simultaneously formed. The oil adsorbing chamber 55 is filled with an oil adsorbing material 55. However, regarding the fixing ring 53, as long as the perforated plate 52 can be supported, it is not necessary to stick to the cylindrical ring shape, and other shapes including those not in the ring shape may be used. In addition, regarding the entrance / exit 51a, 51b, it does not matter which becomes an entrance or an exit.

  In this case, the shape of the oil adsorption tank 50 need not be limited to a cylinder having a circular cross section, and the cross section may be a triangle, a regular triangle, a square, a rectangle, a square, a pentagon, a regular pentagon, a hexagon, or a regular hexagon. It may be a square, regular octagon, or other shapes. As the perforated plate 52, a porous material such as sintered plastic or a material having a plurality of small holes can be considered.

  Here, as the oil adsorbing material 55, a material made of a fiber including a nonwoven fabric such as polypropylene or polystyrene can be considered. However, the oil adsorbent 55 need not be limited to the above-mentioned ones, and if it has an oil adsorbing function and is insoluble in water, activated carbon or sawdust may be considered, and other materials may be used. Absent.

  In this regard, the oil adsorption tank 50 will be described. By filling the entire oil adsorption chamber 50a forming the cylindrical oil adsorption tank 50 with the oil adsorbent 55, the compressed air is at least the length of the cylinder aside from the radial direction. This means that the oil adsorbent 55 is always in contact with the oil adsorbing chamber 50a in the vertical direction.

  In this case, the meaning of advancing through the oil adsorbing chamber 50a in the length direction of the cylinder will be described more specifically. The oil adsorbing material 55 is placed in the oil adsorbing chamber 50a completely without any gap as shown in FIG. By filling, in the oil adsorption chamber 50a while compressed air enters from the inlet / outlet port 51a and exits from the inlet / outlet port 51b, the length of the oil adsorption chamber 50a in the length direction of the cylinder is at least the length of the cylinder. The corresponding distance is always in contact with the oil adsorbent 55. Therefore, unlike the conventional case of going from the center of the circle, which is a cross-section, to the outer circumference of the circle with the radius as the limit, the length of the oil adsorption chamber 50a can be increased arbitrarily and the length is much larger. It became possible.

  In this way, in the oil adsorbing chamber 50a filled with the oil adsorbing material 55, compressed air is directly blocked by the oil adsorbing material 55, or collides with the oil adsorbing material 55 due to being out of the original flow due to inertia. As the particle size of the foreign matter is smaller, the foreign material is captured by colliding with the oil adsorbing material 55 by Brownian motion, which is not related to the flow of compressed air.

  However, as the meaning of proceeding through the oil adsorbing chamber 50a in the length direction of the cylinder, specifically, 10 to 800 cm as the length can be said to be the most desirable value. The reason is that there is a relationship with the pressure of compressed air, and a value close to 10 cm is appropriate for low-pressure compressed air, and a value close to 800 cm is appropriate for high-pressure compressed air. If it is too short, there will naturally be a performance problem that does not reliably catch foreign matter. If it is too long, it is very effective in terms of performance, but the pressure loss increases and the length of the cylinder increases. This is because the oil adsorbing chamber 50a in the vertical direction forms the majority of the entire length of the oil adsorbing tank 50, and is imbalanced both in terms of installation location and strength.

  The meaning of proceeding through the oil adsorbing chamber 50a in the length direction of the cylinder is described from another point of view. The volume of the oil adsorbing tank 50 is 0.2 to 1000 liters, and the cross section of the oil adsorbing tank 50 is also shown. The ratio of the diameter or the longest diagonal line or the longest side of the circle or the polygon forming the oil to the passing distance of the oil adsorbing chamber 50a filled with the oil adsorbing material 55 is 1: 2 to 1:20. In other words, it can be said that foreign matter centered on oil mist can be reliably captured in consideration of the pressure and flow rate of compressed air.

  In this case, the volume of the oil adsorption tank 50 means that the flow rate of compressed air is taken into consideration from the viewpoint of the distance described so far, and it is natural that it is necessary to pay attention to the viewpoint of the ratio described later. However, from the relationship with the pressure of compressed air, a value close to 0.2 liters for low-pressure compressed air and a value close to 1000 liters for high-pressure compressed air are reasonable values. However, if the amount is too small, it is a matter of course that a foreign matter cannot be surely captured. If the amount is too large, it is very effective in terms of performance, but the pressure loss increases, and further in the height direction. This is because the fixed distance forms most of the entire length of the oil adsorption tank 50, and the fixed distance in the height direction is related to the volume, which is imbalanced from the standpoint of installation location and strength.

  Further, if the ratio of the oil adsorption tank 50 is as small as 1: 2, of course, if the cross section is the same, the overall length of the oil adsorption chamber 50a is shortened, causing a problem in performance that foreign matters are not reliably captured. However, if it is as large as 1:20, if the cross section is the same, the total length of the oil adsorbing chamber 50a is increased, so that the entire length of the oil adsorbing tank 50 is formed. This is because it becomes more unbalanced from the standpoint of installation location and strength.

  The oil adsorbent 55 filled in the oil adsorbing chamber 50a is preferably (10 to 200 mm) × (2 to 50 mm), or more preferably (30 to 80 mm) × (5 ˜40 mm). In particular, it is most desirable to prepare two types of sizes of (35 to 55 mm) × (25 to 40 mm) and (40 to 60 mm) × (3 to 10 mm). From another viewpoint, this can be said to be close to the idea of preparing two types of small pieces of 100 mm x 50 mm or less and 3 to 10 times different in area. It can be said that it is ideal to prepare two kinds of small pieces of 60 mm × 40 mm or less and different sizes 4 to 8 times in area.

  Here, the reason why such a size is preferable is that when the oil adsorbing material 55 is filled in the oil adsorbing chamber 50a, if the size is too large, it is difficult to fill a large amount because the gap becomes large. However, it is difficult to obtain a large surface area, and there are many parts that are forcibly compressed, but the function of oil adsorption declines in such parts, and the amount to be filled decreases, so the performance cannot be secured, When it is too small, since the gap is basically small, the oil adsorbing function is rapidly deteriorated, and it is troublesome to cut and various kinds of management.

  Furthermore, the use of two types of sizes means that by preparing two types of small pieces of different sizes, adding small ones to the large gaps and unreasonable compression that are issues with increasing the size It has a great meaning that it can be compensated by adding a big thing to the early functional decline that is a problem by making it small at the same time.

  As for the oil adsorption tank 50, FIG. 1 shows only one set of the configuration of the entire apparatus, but by configuring a plurality of sets in series, the length of the oil adsorption chamber 50a is consequently obtained. It may have the meaning of improving the performance by securing the thickness, or it may have the meaning of improving the processing capacity by securing the area of the oil adsorption chamber 50a as a result by configuring a plurality of sets in parallel. In addition, by configuring a plurality of sets in series and in parallel, it has the meaning of improving both performance and processing capacity by securing the length and area of the oil adsorption chamber 50a as a result. Also good.

  By the way, in the oil adsorbing tank 50, the oil mist is captured by the filled oil adsorbing material 55, but the dust is removed by the dust removing filter 40 immediately before that, that is, the compressed air pipe 116 is connected. By making it as short as possible, and in some cases, by integrating the dust removal filter 40 and the oil adsorption tank 50, it is possible to eliminate the concern that dust will be generated again after the dust is removed. The dust removal filter 40, the compressed air pipe 116, the oil adsorbing tank 50, and the compressed air pipe 117 are integrated to form the integrated oil adsorbing tank 150, so that it is no longer necessary to take the above-mentioned considerations. Conversely, if the compressed air pipe 116 is long, dust may be generated in the meantime, which is prevented.

  In this case, it can be said that the air dryer 20 that removes moisture is exactly the same as the dust removal filter 40 that removes dust. That is, it is desirable to be integral with the oil adsorption tank 50, and it is further desirable to be integral with the dust removal filter 40 and the oil adsorption tank 50, and it is ideal to make the compressed air pipes 113, 114, 115, 116 as short as possible. It is.

  The foreign matter separation method and foreign matter separation device for separating foreign matter from compressed air according to the present invention are configured as described above, and the operation thereof will be described below.

  First, when the electric motor constituting the air compressor 10 is operated, the rotation of the electric motor is transmitted to the air compressor, and the air 201 is sucked to create compressed air. The compressed air produced here is dried by being cooled by the air dryer 20 via the compressed air pipe 111, the on-off valve 11, and the compressed air pipe 112, and temporarily passes through the compressed air pipe 113 to the air tank 30. Stored. Further, the stored compressed air is removed from the compressed air pipe 116 via the compressed air pipe 114, the on-off valve 31 and the compressed air pipe 115 by the dust filter 40, and then sent to the oil adsorption tank 50 from the compressed air pipe 116. Removed.

  Finally, the dried beautiful compressed air 205 can be sent from the compressed air pipe 117 connected to the oil adsorption tank 50 to various actuators such as an air motor and an air cylinder.

  In this case, in the oil adsorbing tank 50, the compressed air that has entered from the inlet / outlet 51a is once stored in the space 51x, and the oil filled with the oil adsorbing material 55 from the perforated plate 52 that has a large number of holes. When the oil mist is fed into the adsorption chamber 50 a and touches the oil adsorbent 55, it is adsorbed by the oil adsorbent 55. Finally, the compressed air is sent out clean and clean compressed air 205 from the inlet / outlet port 51b and the compressed air pipe 117 through the perforated plate 52 and the space 51y with the oil mist removed.

  At that time, in the oil adsorbing chamber 50a filled with the oil adsorbing material 55, the compressed air is directly blocked by the oil adsorbing material 55, collides with the oil adsorbing material 55 by being out of the flow due to inertia, or particles of foreign matter. As the diameter is smaller, the oil adsorbent 55 is captured by colliding with the oil adsorbent 55 by Brownian motion, which is not related to the flow of compressed air. Therefore, the greater the chance that the oil adsorbent 55 is directly blocked or collided, the more reliably the oil mist is removed.

  Since the oil adsorbing material 55 is filled in the oil adsorbing chamber 50a with a high density without any gaps, even if the oil mist is not adsorbed by a few contacts, there are many opportunities to be adsorbed. You can think of it. If the performance of the oil mist adsorption is insufficient, the length of the oil adsorption chamber 50a may be increased apart from the problem of pressure loss. Therefore, in other words, the volume can be determined by the length of the oil adsorption chamber 50a corresponding to the pressure loss of the compressed air, and sometimes the width of the cross section of the oil adsorption chamber 50a corresponding to the flow rate. It can be said that it is an important point.

  On the other hand, in the air dryer 20, the air tank 30, and the dust removal filter 40, drain water 202, 203, 204 generated by dew from compressed air is discharged into drain water discharge pipes 221, 231, 241 and on-off valves 25, 35, It is possible to discharge via 45.

[Second Example]
The second embodiment is different from the first embodiment in that the compressed air pipe 116, the oil adsorption tank 50 and the compressed air pipe 117 in FIG. That is, the tank 60 and the compressed air pipe 122 are configured. In addition, the compressed air pipe 115, the dust filter 40, the compressed air pipe 121, the oil adsorption tank 60, and the compressed air pipe 122 are integrated to form an integrated oil adsorption tank 160.

  Incidentally, the details of the oil adsorption tank 60 are shown in FIG. In this case, as the structure, an inner cylinder 67 having a smaller cross section than the outer cylinder 64 is positioned inside the outer cylinder 64 which is sealed in a cylindrical shape and spaced from the outer cylinder 64, and one end of the inner cylinder 67 is connected to the outer cylinder 64. A passage 67z that is fixed to the upper plate 61 located on one side of the inner cylinder 67 and communicates with the other end of the inner cylinder 67 on the lower plate 62 side located on the other side of the outer cylinder 64 so that the inside and outside of the inner cylinder 67 can communicate with each other. The upper plate 61 is formed with two inlets 61a and 61b through which dirty compressed air is introduced and clean compressed air is discharged, and the inner cylinder 67 and the inner cylinder between the two inlets 61a and 61b. The oil adsorbing material 71 is accommodated in the oil adsorbing chamber 50a between the outer side of the outer cylinder 67 and the outer cylinder 64, and dirty compressed air is introduced into one of the two inlets 61a and 61b, and clean compressed air is discharged on the other side. ing.

  That is, by configuring the inner cylinder 67 and the outer cylinder 64, a long-distance oil adsorption chamber 50a is secured.

  As for the inner cylinder 67, an inner seat 67b and an outer seat 67c are integrally formed on the inner cylinder main body 67a by welding or the like. By the way, the inner seat 67b and the outer seat 67c are formed to position the disc-shaped perforated plate 68 and the ring-shaped perforated plate 69. Further, the outer cylinder 64, the upper plate 61, and the lower plate 62 are fixed by through bolts 65 and nuts 66, and the outer cylinder 64, the upper plate 61, and the lower plate are fixed by O-rings 63 positioned at both ends of the outer cylinder 64. Leakage between 62 is prevented. Similarly, leakage between the inner cylinder 67 and the upper plate 61 is prevented by the O-ring 74.

  It should be noted that the compressed air flows in the length direction of the cylinder, including the material, purpose and function of the spaces 61x and 61y, the perforated plates 68 and 69, the outer fixing ring 72, the inner fixing ring 73, and the oil adsorbing material 71. The oil adsorbing chamber 60a is always in contact with the oil adsorbing material 71, the length of the oil adsorbing chamber 60a in the length direction of the cylinder is 10 to 800 cm, and the adsorbing tank 60 is the most desirable value. It may be considered that it is the same as that of the first embodiment that the volume of is preferably 0.2 to 1000 liters.

  However, FIG. 2 shows an example in which dirty compressed air flows from the inlet / outlet 61a and clean compressed air flows out from the inlet / outlet 61b. By the way, the inflow / outflow ports 61a and 61b may be reversed.

  The foreign matter separation method and foreign matter separation device for separating foreign matter from compressed air according to the present invention are configured as described above, and the operation thereof will be described below.

  In this case, the second embodiment is different from the first embodiment in that the distance that the compressed air moves in the oil adsorption chambers 50a, 60a forming the oil adsorption tanks 50, 60 is In contrast to the length of the oil adsorption tank 50, in the second embodiment, the length of the oil adsorption tank 60 is approximately twice as long as the inner cylinder 67 is configured. is there. As a matter of course, when comparing the oil adsorption tanks 50 and 60 having the same outer shape, the chance of contacting the oil adsorbents 55 and 71 is the second implementation, apart from the problem of the amount of compressed air that can flow. In the case of the example, it is clear that it is twice that of the first embodiment, and it can be said that the performance for adsorbing the oil mist is greatly improved. Note that the problem of the amount of compressed air that can flow can be dealt with by increasing the cross-sectional area of the oil adsorption tank 60 or increasing the volume.

[Third embodiment]
The third embodiment is different from the first embodiment in that the compressed air pipe 116, the oil adsorption tank 50, and the compressed air pipe 117 in FIG. That is, the tank 80 and the compressed air pipe 132 are configured. In addition, the compressed air pipe 115, the dust filter 40, the compressed air pipe 131, the oil adsorption tank 80, and the compressed air pipe 132 are integrated to form an integrated oil adsorption tank 180.

  Incidentally, the details of the oil adsorption tank 80 are shown in FIG. In this case, the structure is such that a middle cylinder 82 having a smaller cross section than the outer cylinder 81 is positioned inside the outer cylinder 81 that is sealed in a cylindrical shape, spaced from the outer cylinder 81, and one end of the middle cylinder 82 is connected to the outer cylinder 81. The other end of the middle cylinder 82 is connected to the other side of the outer cylinder 81 and the other side of the outer cylinder 81 can communicate with the inside and the outside of the middle cylinder 82, An inner cylinder 83 having a smaller cross section than the middle cylinder 82 is positioned inside the middle cylinder 82 at a distance from the middle cylinder 82, and one end of the inner cylinder 83 is fixed to the lower plate 85 located on the other side of the outer cylinder 81. In addition, the other end of the inner cylinder 83 can communicate with the inner side and the outer side of the inner cylinder 83 on the upper plate 84 side positioned on one side of the outer cylinder 81, and the upper plate 84 and the lower plate 85 have dirty compressed air. To form two inlets / outlets 85a and 84b for discharging clean compressed air. An oil adsorbent is provided in the oil adsorbing chamber 80a between the inner cylinder 83 between the two entrances 85a and 84b, between the outer side of the inner cylinder 83 and the inner side of the middle cylinder 82, and between the outer side of the middle cylinder 82 and the inner side of the outer cylinder 81. 88 is housed, dirty compressed air is introduced into one of the two entrances 85a and 84b, and clean compressed air is discharged on the other side.

  That is, by configuring the inner cylinder 83, the middle cylinder 82, and the outer cylinder 81, a long-distance oil adsorption chamber 80a is secured.

  It should be noted that the compressed air is always in the oil adsorbing material 88 while it travels through the oil adsorbing chamber 80a in the length direction of the cylinder, including the purpose and function of the space portions 80x and 80y, the porous plates 86 and 87, and the oil adsorbing material 88. It is preferable that 10 to 800 cm is the most desirable value as the length of the oil adsorption chamber 80a in the length direction of the cylinder, and that the volume of the adsorption tank 80 is 0.2 to 1000 liters. This can be considered the same as the first embodiment. Although not described in FIG. 3, it may be considered that something similar to the fixing ring 53 exists in some form. Further, although FIG. 3 does not show how to fix the outer cylinder 81, the middle cylinder 82, and the inner cylinder 83, it can be said that the method is substantially the same as that of the second embodiment.

  However, FIG. 3 shows an example in which dirty compressed air flows in through the entrance / exit 85a and clean compressed air flows out through the entrance / exit 84b. By the way, the inflow / outflow ports 85a and 84b may be reversed.

  The foreign matter separation method and foreign matter separation device for separating foreign matter from compressed air according to the present invention are configured as described above, and the operation thereof will be described below.

  In this case, the third embodiment is different from the first embodiment in that the distance that the compressed air moves in the oil adsorption chambers 50a, 80a forming the oil adsorption tanks 50, 80 is In contrast to the length of the oil adsorption tank 50, in the third embodiment, the middle cylinder 82 and the inner cylinder 83 constitute a length approximately twice the length of the oil adsorption tank 60. It is to become. As a matter of course, when comparing the oil adsorption tanks 50 and 80 having the same outer shape, the chance of contacting the oil adsorbents 55 and 88 is the third implementation, apart from the problem of the amount of compressed air that can flow. In the case of the example, it is clear that it is three times that of the first embodiment, and it can be said that the performance for adsorbing the oil mist is greatly improved. The problem of the amount of compressed air that can flow can be dealt with by increasing the cross-sectional area of the oil adsorption tank 80 or increasing the volume.

  By the way, if the third embodiment is further enlarged, it is possible to arrange another cylinder inside the inner cylinder 83 to secure the length four times or more and form the oil adsorption chamber. It is.

  Capturing oil mist from compressed air has improved dramatically, making it unnecessary to use an expensive oil-free compressor in many ways.

  Diagram showing the entire invention of the present application   Another view of the oil adsorption tank of the present invention   Still another view of the present invention oil adsorption tank   Previously used filter element

Explanation of symbols

10. Air compressor 11. On-off valve 20. Air dryer 25. On-off valve 30 ... Air tank 31 ... ..Open / close valve 35 ... Open / close valve 40 ... Dust removal filter 45 ... Open / close valve 50 ... Oil adsorption tank 50a ... Oil adsorption chamber 51... Main body 51 a. ········ Fixing ring 55 ··· Oil adsorbent 60 ··· Oil adsorbing tank 60a · · · Oil adsorbing chamber 61 · · · Upper plate 61a ··· Entrance / exit 61b ··· Exit / exit 61x ··· Space portion 61y ··· Space portion 62 ··· Lower plate 63 ···· O phosphorus 64 ··· outer cylinder 65 ··· through bolt 66 ··· nut 67 ··· inner tube 67a · · · inner cylinder body 67b ··· Inner seat 67c ... Outer seat 67z ... Passage 68 ... Perforated plate 69 ... Perforated plate 71 ... Oil adsorbent 72 ... .... Outer fixing ring 73 ... Inner fixing ring 74 ... O-ring 80 ... Oil adsorption tank 80a ... Oil adsorption chamber 80x ... Space Portion 80y ... Space part 81 ... Outer cylinder 82 ... Middle cylinder 83 ... Inner cylinder 84 ... Upper plate 84b ...・ Inlet / outlet 85 ··· Lower plate 85a ··· Inlet / outlet 86 ··· Perforated plate 87 ··· Perforated plate 88 ··· Oil adsorbent 90 ··· ... Filter filter Ment 90a ... compressed air flow 90z ... liquid particles 91 ... pre-filter 92 ... glass fiber 93 ... plastic foam 111 ... .... Compressed air piping 112 ... Compressed air piping 113 ... Compressed air piping 114 ... Compressed air piping 115 ... Compressed air piping 116 ... Compressed air piping 117 Compressed air piping 121 Compressed air piping 122 Compressed air piping 131 Compressed air piping 132 Compressed air piping 150 -Integrated oil adsorption tank 160 -Integrated oil adsorption tank 180 -Integrated oil adsorption tank 201 -Air 202 -Drain water 203 -Drain Water 204 ... Drain water 205 ... Dry Dry and clean compressed air 221 ... drain water discharge pipe 231 ... drain water discharge pipe 241 ... drain water discharge pipe

Claims (11)

  In a foreign matter separation method for separating foreign matter from compressed air, a cylindrical oil adsorption tank (55, 71, 88) filled with an oil adsorbent (55, 71, 88) for capturing oil mist contained in the compressed air 50, 60, 80), the compressed air always passes through the oil adsorption chamber (50a, 60a, 80a) in the length direction of the cylinder in the oil adsorption tank (50, 60, 80). A foreign matter separation method for separating foreign matter from compressed air, wherein the foreign matter is contacted with the oil adsorbent (55, 71, 88).   2. The foreign matter separating method for separating foreign matter from compressed air according to claim 1, wherein the oil adsorbing material (55, 71, 88) is a fiber, activated carbon, or sawdust containing a nonwoven fabric of polypropylene or polystyrene.   The water or dust is removed in the vicinity of the oil adsorbing tank (50, 60, 80) immediately before the oil mist is captured by the oil adsorbing material (55, 71, 88). A foreign matter separation method for separating foreign matter from compressed air according to claim 2.   The length of the oil adsorption chamber (50a, 60a, 80a) is 10 to 800 cm, and the foreign matter separation for separating foreign matter from the compressed air according to any one of claims 1 to 3. Method.   In a foreign matter separating apparatus for separating foreign matter from compressed air, a cylindrical oil adsorbing tank is made of oil adsorbents (55, 71, 88) made of fibers containing nonwoven fabric for the purpose of capturing oil mist contained in compressed air. (50, 60, 80) is filled in the oil adsorption chamber (50a, 60a, 80a), and the compressed air is at least in the length direction of the cylinder of the oil adsorption tank (50, 60, 80). A foreign matter separating apparatus for separating foreign matter from compressed air, wherein the foreign matter is always in contact with the oil adsorbent (55, 71, 88) while traveling through the adsorbing chamber (50a, 60a, 80a).   For the purpose of flowing compressed air uniformly between the inlet / outlet (51a, 51b, 61a, 61b, 85a, 84b) of the oil adsorption tank (50, 60, 80) and the oil adsorption chamber (50a, 60a, 80a). 6. A foreign matter separating apparatus for separating foreign matter from compressed air according to claim 5, wherein a space (51x, 51y, 61x, 61y, 80x, 80y) is formed.   The foreign matter separating apparatus for separating foreign matter from compressed air according to claim 5 or 6, wherein the oil adsorption tank (50, 60, 80) has a volume of at least 0.2 to 1000 liters.   The oil adsorbing tank (50) includes a circle or polygonal diameter forming a cross section, the longest diagonal or the longest side, and the oil adsorbing chamber (50a) filled with the oil adsorbing material (55). The foreign substance separating apparatus for separating foreign substances from compressed air according to any one of claims 5 to 7, wherein the ratio of the total length of the passing distance is 1: 2 to 1:20.   The oil adsorbing tank (60) has an inner cylinder (67) having a smaller cross section than the outer cylinder (64) inside the outer cylinder (64) sealed in a cylindrical shape, spaced from the outer cylinder (64). One end of the inner cylinder (67) is fixed to the upper plate (61) located on one side of the outer cylinder (64), and the other end of the inner cylinder (67) is fixed to the outer cylinder (64). On the other side of the lower plate (62), a passage (67z) is formed so that the inside and outside of the inner cylinder (67) can communicate with each other, and dirty compressed air flows into the upper plate (61). The two inlets (61a, 61b) for discharging clean compressed air are formed, and the inside of the inner cylinder (67) and the outer side of the inner cylinder (67) between the two outlets (61a, 61b). The oil adsorbing material (71) in the oil adsorbing chamber (60a) between the outer cylinder (64) and the outer cylinder (64), The foreign matter is separated from the compressed air according to claim 6 or 7, wherein dirty compressed air is introduced into one of the two entrances (61a, 61b) and clean compressed air is discharged on the other. Foreign material separator.   10. The oil adsorption tank (50, 60, 80) is arranged in a plurality in series, a plurality in parallel, or a plurality in both series and parallel. A foreign matter separating device for separating foreign matter from the compressed air described in 1.   A dust removal filter (40) for removing dust and an air dryer (20) for removing moisture are disposed upstream of the oil adsorption tank (50, 60, 80), and the dust removal filter (40) and the oil adsorption tank ( The foreign matter is separated from the compressed air according to any one of claims 5 to 10, characterized in that 50, 60, 80) are integrally formed as an integrated oil adsorption tank (150, 160, 180). Foreign material separator.

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