JP6014831B2 - Gas-liquid separation filter and air purifier for compressed air - Google Patents

Description

  The present invention is a cylindrical thin wall having a plurality of ventilation holes provided in the entire thin wall to form a ventilation structure material, and a cylindrical shape surrounding the outer peripheral side of the cylindrical screen. Supplying compressed air to a gas-liquid separation filter provided with a filtration part that filters contaminated gas and a pair of end plates that seal and fix both ends of the cylindrical filter component parts with an adhesive For compressed air that is placed in the middle of compressed air piping that connects a compressor and pneumatic equipment that uses compressed air supplied from the compressor, and has a built-in gas-liquid separation filter to clean it by filtering compressed air Relates to the air purifier.

  Conventionally, the present applicant has formed a filtering part by arranging a filtering medium around a hollow core material having a plurality of ventilation holes, and the gas supplied to the inside of the core material has changed the filtering part. A filter for filtering an object to be filtered with a filter medium when it is passed through, comprising a first filter section and a second filter section as the filter section, wherein the first filter section is a fibrous first filter medium formed article A laminate of the first filter sheet as the filter medium processed into a sheet form and the second filter sheet as the filter medium processed into a sheet form from the fibrous second filter medium formed article is disposed around the core material. A filter formed by winding, and the second filtration part is formed by winding the second filtration sheet around the core material to the outer peripheral side without winding the first filtration sheet; A filter manufacturing method (see Patent Document 1) is disclosed. There. According to this, the manufacturing cost can be sufficiently reduced (see Patent Document 1).

  As the second filter medium, there is a filter (gas-liquid separation filter) in which, for example, a breathable sponge-like polyurethane foam is wound around a cylindrical outer peripheral side and used as a filter medium for oil aggregation separation. . In this gas-liquid separation filter, the gas-liquid separation efficiency may be extremely lowered due to deterioration of the material over time. In addition, when the state change of the filter medium appears apparently, the performance is remarkably deteriorated.

  In addition, as a filter material for oil agglomeration and separation, there is an example in which a thick felt-like polyester fiber nonwoven fabric is employed, but in this polyester fiber nonwoven fabric, filter fibers constituting the filter material are bonded to each other (welding, adhesive, etc.) ) Is fixed in three dimensions. According to this, the displacement between the filter fibers hardly occurs, the pore size becomes small due to the oil swelling related to the filter fibers, and clogging is likely to occur, and the pressure loss (venting resistance) is likely to increase. In this case, the replacement time cannot be determined by appearance.

JP2011-189325A (first page)

The problems to be solved with regard to the gas-liquid separation filter and the air purifier for compressed air are that the conventional filter media is swollen by mist of liquid such as oil and the gas-liquid separation efficiency is deteriorated due to deterioration of the filter media itself. Filter performance such as pressure loss and pressure loss is reduced, and filter life is shortened.
SUMMARY OF THE INVENTION An object of the present invention is to provide a gas-liquid separation filter and an air purifier for compressed air that can separate liquid mist from gas more efficiently with lower pressure loss and extend filter life. .

The present invention has the following configuration in order to achieve the above object.
According to one aspect of the gas-liquid separation filter according to the present invention, a cylindrical screen which is a cylindrical thin wall and has a large number of ventilation holes provided on the entire thin wall to form a ventilation structure, Provided in a cylindrical shape that surrounds the outer peripheral side of the cylindrical screen and filters the pollutant gas, and a pair of end plates that seal and fix both ends of the cylindrical filter component parts with an adhesive. a gas-liquid separation filter, the filtration unit, large number of thin nonwoven filter cloth material provided by the fibrous material made of material which swells by the mist of the liquid, not pull so as to substantially elongated It is configured to be formed in multiple layers by wrapping around a number of times, and is provided so as to generate wrinkles when swollen by a liquid mist.

  Moreover, according to one form of the gas-liquid separation filter which concerns on this invention, it is a cylindrical thin wall and many ventilation holes are provided in the whole thin wall, and it is the ventilation structure material of the inner peripheral side. An inner cylinder screen, a first filtering portion that is provided in a cylindrical shape surrounding the outer peripheral side of the inner cylinder screen and that primarily filters contaminated gas, and a cylindrical thin wall that has a large number of An outer cylinder screen that is provided with a vent hole and surrounds the first filtration part to form an outer peripheral ventilation structure, and is provided in a cylindrical shape that surrounds the outer periphery side of the outer cylinder screen and is provided in the first filtration part. A gas-liquid separation filter comprising: a second filtration unit that secondarily filters the filtered polluted gas; and a pair of end plates that seal and fix both ends of the cylindrical filter component with an adhesive. The second filtration part is swollen by liquid mist It is composed of a thin non-woven filter cloth material provided by a fiber material made of a material that is wound in multiple layers without being pulled so as to be substantially stretched, and is swollen by a liquid mist. It is provided so as to generate wrinkles.

  Moreover, according to one form of the gas-liquid separation filter which concerns on this invention, the said 1st filtration part is characterized by providing the filter paper material provided with the glass fiber in the shape of a pleat. it can.

  Moreover, according to one form of the gas-liquid separation filter which concerns on this invention, the fiber material which comprises the said thin nonwoven fabric-like filter cloth-like material can be the polypropylene fiber by a melt blow manufacturing method, It can be characterized by the above-mentioned.

  Moreover, according to one form of the air cleaner for compressed air which concerns on this invention, it is an air cleaner for compressed air comprised by mounting | wearing with said cylindrical gas-liquid separation filter, Comprising: The said gas-liquid The separation filter is erected so that the pair of end plates are mounted so as to be positioned vertically.

  According to the gas-liquid separation filter and the air purifier for compressed air according to the present invention, the special advantageous effect that the filter life can be further extended by separating the liquid mist from the gas with higher pressure loss at a lower pressure loss. Play.

It is sectional drawing which shows the form example of the gas-liquid separation filter which concerns on this invention. It is sectional drawing which shows the form example of the air cleaner for compressed air which concerns on this invention. It is explanatory drawing which shows the initial state of a filter fiber and a filter material, and the state after swelling. It is a photograph which shows the form example of the unused state of the gas-liquid separation filter which concerns on this invention. It is a photograph which shows the form example after the fiber which comprises a filter medium swells and the wrinkle produced by using the gas-liquid separation filter which concerns on this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a gas-liquid separation filter and an air purifier for compressed air according to the present invention will be described in detail based on the attached drawings (FIGS. 1 to 5).
The present invention is a cylindrical thin wall 30 having a large number of ventilation holes provided in the entire thin wall to form a ventilation structure, and a cylinder surrounding the outer peripheral side of the cylindrical screen 30. Gas-liquid comprising a filter part 31 that is provided in a shape and filters polluted gas, and a pair of end plates 41 and 42 that seal and fix both ends of the cylindrical filter components 30 and 31 with an adhesive. It relates to a separation filter.

  And the filtration part 31 is comprised by winding the thin nonwoven fabric filter cloth-like material 32 provided with the fiber material which consists of a raw material swollen with a liquid mist many times, and forming in multiple layers, liquid state When swollen by mist, it is provided so that wrinkles 33 are generated.

  In this embodiment, an inner cylindrical screen 20 which is a cylindrical thin wall and has a large number of ventilation holes in the entire thin wall to form a ventilation structure material on the inner peripheral side, and the inner cylindrical screen 20 A first filtering portion 21 that is provided in a cylindrical shape surrounding the outer peripheral side and primarily filters pollutant gas, and a thin tubular wall that has a large number of ventilation holes in the entire thin wall and is provided with a first filtration. The outer cylinder screen 30 that surrounds the portion 21 and serves as a ventilation structure material on the outer peripheral side, and the polluted gas that is provided in a cylindrical shape that surrounds the outer peripheral side of the outer cylinder screen 30 and is filtered by the first filtration unit 21 A second filtration unit 31 for subsequent filtration and a pair of end plates 41 and 42 for sealing and fixing both ends of the cylindrical filter components 20, 21, 30, and 31 with an adhesive. The present invention relates to a liquid separation filter.

The second filtering unit 31 does not pull the thin non-woven filter cloth material 32 provided by a fiber material made of a material swollen by a liquid mist such as oil or water so as to substantially extend. It is configured by being wound many times and formed into multiple layers, and is provided so as to generate ridges 33 when swollen by a mist of a liquid such as oil or water. The number of winding layers is, for example, 20 to 30 layers.
The filter part (second filter part) 31 which is a filter material layer swollen by a liquid mist reduces the pore size of the filter part 31 and increases the filtration area by making it wavy so as to generate the ridge 33. be able to. Thereby, it can stabilize in the state which the separation efficiency of gas-liquid separation improved, can prevent the rise in pressure loss, and can extend the lifetime of a filter.

Further, in the present embodiment, the first filtering unit 21 is provided by forming a filter paper material provided with glass fibers in a pleated shape.
According to this, the filter paper material itself made of glass fiber has high performance as a filter element, and the filtration area can be reduced by forming the pleated shape to increase the filtration area, so that a filtration layer with low ventilation resistance can be appropriately formed. Can be configured. For this reason, mists such as oil mist and water mist, and dust can be separated and captured efficiently, pressure loss can be reduced, and separation and collection efficiency can be increased.

  Moreover, the fiber material which comprises the thin nonwoven fabric-like filter cloth-like material 32 of this form example is a polypropylene fiber by a melt blow manufacturing method. According to this, it is possible to manufacture an extremely fine filter fiber, and it is possible to configure a high-performance filter cloth material 32 that can realize high separation / collection efficiency with a low pressure loss. And since the filter cloth-like material 32 which is swollen by the liquid mist in the state wound by the multilayer and forms a suitable wrinkle can be comprised, the filtration area is increased and the performance of the gas-liquid separation filter 10 is improved more. Can do.

Next, the effect of the gas-liquid separation filter 10 according to the above configuration will be described in detail with reference to FIG.
The gas-liquid separation filter 10 of the present embodiment configures a filter element as a filtration unit (second filtration unit) 31 in a wet process of collecting particles such as oil mist and getting wet with liquid mist such as oil mist. The filter fiber of the filter material for oil coagulation and separation absorbs liquid such as oil, and utilizes the property of swelling (see FIG. 3A) in which the fiber diameter and surface area increase.

  As an effect | action by the swelling of this filtration part (2nd filtration part) 31, since a hole diameter (pore size) becomes small as shown in FIG.3 (b), collection efficiency and separation efficiency can be improved appropriately and rapidly. it can. However, the pore size is not simply reduced, but as shown in FIG. 3C, it is provided to extend as a whole to form the ridge 33, so that the surface area is increased, and the pore size is larger than necessary. It will never get smaller. According to this, the collection efficiency and the separation efficiency are stabilized, and the filter life can be extended. As a result of continuous tests at high temperature and high humidity, stable collection efficiency and separation efficiency were maintained.

  In the gas-liquid separation filter 10 provided in the shape of the cylindrical body of this embodiment, horizontal stripe-shaped ridges 33 in the direction orthogonal to the axial center of the cylindrical body are likely to occur as shown in the photograph of FIG. This is because the dimension between the pair of end plates 41 and 42 is fixed and restricted so as not to change, but the direction in the diametrical direction is not restricted at all. That is, the axial length parallel to the axial center is constrained by the cylindrical screen (outer cylinder screen) 30 or the inner cylinder screen 20 and the pair of end plates 41, 42, and is maintained at a certain length. The second filtration unit 31 swells and extends.

According to this, the second filtration part 31 expands in all directions as a result of swelling, but there is no escape in the axial direction, and the extension appears as horizontal stripe-shaped ridges 33. . The horizontal stripe-shaped ridge 33 appears by providing a ring-shaped groove portion 33a and a ring-shaped stripe portion 33b by forming irregularities extending in a direction orthogonal to the axial direction.
On the other hand, in the radial direction orthogonal to the axial center of the second filtration part 31, there is nothing to regulate outside, so the diameter of the second filtration part 31 expands by swelling. Thus, since the 2nd filtration part 31 expands in diameter, a vertical stripe wrinkle hardly appears.

  In addition, the second filtration part 31 of this embodiment is bonded to prevent the winding so that the outermost end part 32a is not turned up only by winding the thin non-woven filter cloth material 32 around a large number of layers. The layers of the material 32 are not bonded to each other. That is, a thin non-woven filter cloth material 32 that is two-dimensionally spread is wound without bonding, and the filter fibers are three-dimensionally arranged for the thin thickness of the cloth of the filter cloth material 32. However, the filter fibers are not in a three-dimensionally bonded state over the entire thickness of the second filtration part 31. Thus, since the 2nd filtration part 31 is comprised, it has a structure which is easy to form the collar 33. FIG.

The polypropylene fibers constituting the filter cloth material 32 of this embodiment can be subjected to electret treatment. According to the filter cloth-like material 32 subjected to the electret treatment, the filter performance can be improved, and it is difficult to turn when wound in the manufacturing process, and it is easy to hold the wound shape, so that there is an advantage that productivity can be improved.
Moreover, the axial length of the filtering part 31 may be provided longer than the cylindrical screen 30, and may be contracted so that the flange 33 may be retracted at an early stage and fixed between the pair of end plates 41 and 42. According to this, the filtration area can be further increased, and the filter performance can be further improved.

  By the way, in the gas-liquid separation filter 10 according to the present embodiment, a space is formed between the first filtration unit 21 and the outer cylinder screen 30, and the outer cylinder screen 30 flows down through a condensed liquid such as oil. It also functions as a guide material. Moreover, since the 1st filtration part 21 of this embodiment is formed in the shape of a pleat, the space | gap formed between the outer surfaces of adjacent pleats is ensured suitably as an aggregation space, and the aggregation effect increases. Then, the horizontal stripe-shaped ridges 33 are formed in the second filtration unit 31, so that the outer filtration surface of the outer cylinder screen 30 is reliably contacted with the ridge 33 portion of the second filtration unit 31. This contact is strongly made by the ring-shaped streak portion 33b. On the contrary, the ring-shaped groove portion 33 a functions so as to form a gap that becomes a cohesive space without contacting the outer peripheral surface of the outer cylinder screen 30. By contacting in this way, a liquid such as oil that is agglomerated in the layer of the second filtration unit 31 moves to the outer cylinder screen 30 and easily flows along the surface of the outer cylinder screen 30. According to this, clogging of the 2nd filtration part 31 can be prevented, and filter performance can be improved more.

  In addition, the material of the cylindrical screen (outer cylinder screen) 30 is preferably aluminum having higher lipophilicity than, for example, stainless steel when separating the oil mist. As described above, if the material of the cylindrical screen 30 is selected, the oil easily flows down through the cylindrical screen 30, and the agglomerated oil is quickly flowed by an action such as gravity to clog the gas-liquid separation filter 10. Can be prevented.

  The second filtration unit 31 of the present embodiment uses polypropylene fibers having an ultrafine fiber diameter, but other materials such as polyethylene fibers and acrylic fibers having a property of swelling in oil can also be used. Moreover, about the gas-liquid separation filter 10 for isolate | separating water mist, raw materials, such as nylon, can be utilized as a filter fiber.

Next, a configuration example of the air cleaner 102 for compressed air configured by mounting the gas-liquid separation filter 10 described above will be described with reference to FIG.
In this embodiment, the compressor 100 that supplies compressed air and the pneumatic equipment 105 that uses the compressed air supplied by the compressor 100 are arranged in the middle of the compressed air pipe 103, and the gas-liquid separation filter 10 is built-in. Thus, the air cleaner 102 for compressed air is purified by filtering the compressed air. 102a is an air inlet of the air purifier 102, and 102b is an air outlet. 102 c is a casing of the air purifier 12.

In this compressed air cleaner 102, the gas-liquid separation filter 10 is erected so that a pair of end plates (upper end plate 41, lower end plate 42) are positioned vertically. It is provided in the structure. According to this, the agglomerated liquid can be suitably dropped along the vertical cylindrical screen (outer cylinder screen) 30 erected by gravity, and clogging of the filtration unit (second filtration unit) 31 is prevented. Can prevent and improve the filter performance.
In addition, 41a is a connection port part, is provided in the upper end plate 41, and is provided so that it may be connected to the flow path of the air inlet 102a of the air cleaner 102. As a result, the contaminated air is introduced into the gas-liquid separation filter 10, and the clean air that has passed through the gas-liquid separation filter 10 from the inside to the outside is discharged from the air outlet 102b.

  The air purifier for compressed air according to the present invention is not limited to compressed air, and can be adapted for other compressed gases.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

DESCRIPTION OF SYMBOLS 10 Gas-liquid separation filter 20 Inner cylinder screen 21 1st filtration part 30 Outer cylinder screen (cylindrical screen)
31 2nd filtration part (filtration part)
32 Filter cloth material 32a Endmost portion 33 ３３ 33a Ring-shaped groove portion 33b Ring-shaped stripe portion 41 Upper end plate 41a Connection port portion 42 Lower end plate 100 Compressor 101 Compressed air dehumidifier 102 Air cleaner 102a Air inlet 102b Air outlet 102c Casing 103 Compressed air piping 105 Pneumatic equipment

Claims (5)

A cylindrical screen that is a cylindrical thin wall and has a large number of ventilation holes in the entire thin wall to form a ventilation structure;
A filtration part that is provided in a cylindrical shape surrounding the outer peripheral side of the cylindrical screen and filters contaminated gas;
A gas-liquid separation filter comprising a pair of end plates for sealing and fixing both ends of the above tubular filter component with an adhesive,
A thin non-woven filter cloth-like material provided by a fiber material made of a material that swells with liquid mist is wound many times without being pulled so as to be substantially stretched to form a plurality of layers. The gas-liquid separation filter is characterized by being formed so as to generate wrinkles when swollen by a liquid mist. An inner cylindrical screen which is a cylindrical thin wall and has a large number of ventilation holes in the entire thin wall to be a ventilation structure material on the inner peripheral side;
A first filtration part that is provided in a cylindrical shape surrounding the outer peripheral side of the inner cylinder screen and that primarily filters contaminated gas;
An outer cylindrical screen which is a cylindrical thin wall and has a large number of ventilation holes in the entire thin wall and surrounds the first filtration part to be an outer peripheral ventilation structure material;
A second filtration part that is provided in a cylindrical shape surrounding the outer peripheral side of the outer cylinder screen and secondarily filters the polluted gas filtered by the first filtration part;
A gas-liquid separation filter comprising a pair of end plates for sealing and fixing both ends of the above tubular filter component with an adhesive,
The second filtration part is wound in a number of layers by winding a thin non-woven filter cloth material provided by a fiber material made of a material swelled by a liquid mist without pulling the filter cloth material so as to substantially extend. A gas-liquid separation filter, which is formed so as to form wrinkles when swollen by a liquid mist.   3. The gas-liquid separation filter according to claim 2, wherein the first filtration part is provided by forming a filter paper material provided with glass fibers in a pleated shape.   The gas-liquid separation filter according to any one of claims 1 to 3, wherein the fiber material constituting the thin non-woven filter cloth material is a polypropylene fiber produced by a melt blow manufacturing method.   An air purifier for compressed air configured by mounting the cylindrical gas-liquid separation filter according to any one of claims 1 to 4, wherein the gas-liquid separation filter is erected and the pair of end plates The air purifier for compressed air according to any one of claims 1 to 4, wherein the air purifier is provided so as to be mounted so as to be positioned vertically.