JP2022097908A - Ultra high pressure filter - Google Patents

Abstract

To provide an ultra high pressure filter capable of performing filter processing even on raw materials of a single structure and various fibrous forms.SOLUTION: An ultra high pressure filter 1 that sorts raw material M particles before supplying pressurized raw material M to an injection chamber 104, includes: a body 2 having a groove part 3: a two-layer structure filter part 8 which is arranged on the groove part 3 and which has a concavo-convex filter 10 and a metal filter 11; and a filter pressing part 4 for pressing the filter pat 8.SELECTED DRAWING: Figure 2

Description

The present invention relates to an ultra-high pressure filter in an apparatus for atomizing, dispersing, emulsifying, etc. by colliding high-pressure fluids of raw materials to be treated with each other.

Conventionally, as an ultra-high pressure filter used in a wet atomizing device for atomization, dispersion, emulsification, etc., for example, a wedge wire that disperses and crushes large-diameter particles by passing a raw material through a mesh gap between wires. Filters are known. When targeting extremely hard particles such as barium titanate, when these hard particles pass through a narrow mesh at high speed, the filter surface made of SUS wire constituting the mesh is worn or eroded by ablation or erosion. Eventually, large particles may pass through the filter as they are, causing nozzle clogging.

In order to solve such a problem, the material particles are arranged in the middle of the pipe for sending the raw material liquid pressurized via the pressurizing means to the injection nozzle, and the material particles having a diameter larger than the injection diameter of the injection nozzle in the raw material liquid are solved. A filter device for crushing is disclosed (for example, Japanese Patent No. 4933760). This filter device is formed between a first ring member made of a high hardness member, a second member separate from the first ring member, and a first ring member and a second member. It has a raw material liquid flow path composed of gaps. The gap has a width dimension smaller than the injection diameter of the injection nozzle. Then, the material particles having a diameter larger than the injection diameter of the injection nozzle are crushed to the width dimension or less.

In the conventional filter device, the first ring member and the second member must be arranged, and further, it is necessary to adjust the injection diameter of each member, which has a problem in terms of maintainability.

An object of the present invention is to provide an ultrahigh pressure filter capable of filtering a single structure and various fibrous raw materials.

The ultra-high pressure filter of the present invention
An ultra-high pressure filter that sorts particles of the raw material before supplying the pressurized raw material to the injection chamber.
The main body with a groove and
A filter unit arranged in the groove portion.
Concavo-convex filter and
With a metal filter,
A two-layer structure filter unit with
The filter holding part that holds the filter part and the filter holding part
Have.

According to the ultra-high pressure filter of the present invention, it is possible to perform a filter treatment even on various fibrous raw materials having a single structure.

Configuration diagram of the atomizing device 100 of this embodiment Sectional drawing which shows the ultra-high pressure filter 1 of this embodiment (A) Perspective view of the filter unit 8 of the embodiment, (b) Cross-sectional view of the filter unit 8 of the embodiment, (c) Perspective view of the filter unit 8 of another embodiment (d) Filter unit of another embodiment. Section 8

Hereinafter, embodiments will be described with reference to the drawings as appropriate.

(Structure of atomizer)
As shown in FIG. 1, the atomizing device 100 of the present embodiment includes a raw material tank 101, a liquid supply pump 102, a pressure booster 103, and an injection chamber 104. The raw material tank 101 stores the raw material M (slurry). The liquid supply pump 102 pumps the raw material M of the raw material tank 101 by pressure. The pressure booster 103 pressurizes the raw material M that is pressure-fed from the liquid supply pump 102. The ultra-high pressure filter 1 filters the pressurized raw material M. The injection chamber 104 is subjected to atomization treatment.

(Composition of ultra-high pressure filter)
As shown in FIG. 2, the ultra-high pressure filter 1 of the present embodiment has a main body 2 of the ultra-high pressure filter and a filter unit 8. The filter portion 8 is arranged in the groove portion 3 in the main body 2 and is fixed by the filter holding portion 4. The filter unit 8 has a two-layer structure of a cylindrical concavo-convex filter 10 and a metal filter 11, respectively.

In the main body 2 of the ultra-high pressure filter, the raw material M after pressurization supplied from the pressure booster 103 passes through the main body flow path 2a and is carried to the injection chamber 104 for filtering. The main body 2 has a groove portion 3. The groove portion 3 is located on the downstream side of the main body flow path 2a. The groove portion 3 has a diameter larger than that of the main body flow path 2a. The filter portion 8 is arranged in the groove portion 3. By fitting the filter portion 8 with the filter pressing portion 4 and fixing the filter pressing portion 4 and the main body 2 with the fixing member 7, the filter portion 8 can be fixed more stably.

The shape of the groove portion 3 may be any shape as long as it can be fitted into the filter portion 8, and is, for example, a cylindrical shape. The diameter of the groove portion 3 is larger than the outer diameter of the filter portion 8. Therefore, after the raw material M flows into the gap formed between the filter portion 8 and the groove portion 3, it easily passes through the unevenness filter 10 and the metal filter 11.

An auxiliary groove portion 3a may be formed between the main body flow path 2a and the groove portion 3. For example, the diameter of the auxiliary groove portion 3a is made smaller than that of the groove portion 3. As a result, the groove expands as it progresses inward, smoothing the passage of the raw material M, and preventing clogging in the main body 2 of the ultra-high pressure filter.

The filter pressing unit 4 presses the filter unit 8 to the main body 2. A through hole 5 is formed inside the filter holding portion 4. The through hole 5 communicates with the internal space of the unevenness filter 10 and the metal filter 11. The outer shape of the through hole 5 is the same size as the main body flow path 2a. Therefore, it is difficult to put a burden on a specific portion of the through hole 5.

The filter holding portion 4 may have a stepped shape in order to ensure the airtightness associated with the connection with the main body 2. Specifically, the main body opening 2b of the main body 2 and the intermediate portion 4c of the filter holding portion 4 are used as primary connection points. By making the diameter of the intermediate portion 4c larger than the diameter of the groove portion 3, a portion where the main body opening 2b and the intermediate portion 4c overlap is created. Therefore, it is possible to prevent the raw material M filled in the groove 3 from leaking to the outside.

The filter sealing portion 4b of the filter holding portion 4 is connected to the end faces of the concave-convex filter 10 and the metal filter 11. This makes it possible to seal the inside of the filter. The shape of the filter sealing portion 4b is, for example, an end face perpendicular to the end faces of the concave-convex filter 10 and the metal filter 11, or a tapered shape having an acute angle toward the tip.

A plurality of openings 6 are formed in the tip portion 4a of the filter holding portion 4 in the direction perpendicular to the center line of the through hole 5. The raw material M that has passed through the metal filter 11 and the unevenness filter 10 is reintegrated toward the inner peripheral direction. By forming the opening 6 in the direction perpendicular to the center line of the through hole 5, the reintegrated raw materials M are likely to be guided to the through hole 5.
For example, by arranging the four openings 6 evenly, the raw material M can be drawn evenly from the four directions. The number of openings 6 is not limited to four, and can be appropriately changed to two, six, eight, etc., depending on the size of the ultrahigh voltage filter 1, the size of the raw material M, and the like.

It is desirable that the plurality of openings 6 are arranged on the downstream side of the unevenness filter 10 and the metal filter 11. The raw material M is supplied to the ultrahigh pressure filter 1 from the pressure booster 103 side and processed in the injection chamber 104. Here, if the opening 6 is arranged on the upstream side, the raw material M tends to be stored in the space on the downstream side. By arranging the opening 6 on the downstream side, the raw material M can be smoothly supplied.

The filter unit 8 is, for example, a cylindrical member. The filter portion 8 may have a shape other than the cylindrical shape, but it is desirable that the filter portion 8 has a cylindrical shape because the raw material M is filtered from all directions.
The unevenness filter 10 and the metal filter 11 are arranged on the ring portion 9 or the lid member 12.

The filter portion 8 has an integral structure in which the concave-convex filter 10 and the metal filter 11 are welded to the ring portion 9 or the lid member 12 at the peripheral portion. The welding method is, for example, laser welding, solder welding, or the like. For brazing or the like, a method in which a part of the composite structure of the unevenness filter 10 and the metal filter 11 is not filled is desirable because a part of the composite structure is filled and the aperture ratio is deteriorated.
As in the embodiment shown in FIGS. 3A and 3B, one end of the unevenness filter 10 and the metal filter 11 is sealed by the lid member 12. The other ends of the unevenness filter 10 and the metal filter 11 are sealed by the filter holding portion 4. Further, as in another embodiment shown in FIGS. 3 (c) and 3 (d), one end or both ends of the concave-convex filter 10 and the metal filter 11 are welded by the ring portion 9, and the ring portion 9 is closed by the lid member 12. You may.

The unevenness filter 10 is filtered by passing the raw material M through the raw material M. The unevenness filter 10 has a cylindrical shape according to the shape of the filter portion 8. The surface of the unevenness filter 10 has, for example, an unevenness shape or a polygonal shape. For the unevenness filter 10, for example, a wedge wire screen is desirable. The width (slot size, rod pitch, etc.), angle, size, aperture ratio, etc. of the unevenness can be selected to obtain the most effect in consideration of the grain shape, fiber length, etc. of the raw material M. In the case of a wedge wire screen, it can be applied to relatively hard raw materials (particles) and has excellent pressure resistance. Therefore, by arranging such a strong member inside the filter unit 8, it functions as a secondary filter, and the life of the ultra-high voltage filter can be extended.

Like the concave-convex filter 10, the metal filter 11 has a cylindrical shape that matches the shape of the filter portion 8. The metal filter 11 is arranged on the outer periphery of the unevenness filter 10. The metal filter 11 functions as a primary filter of the raw material M. The metal filter 11 has, for example, a mesh structure. As the mesh structure, the opening ratio and aperture ratio of the metal filter 11 formed by the weaving method such as plain weave wire mesh, twill weave wire mesh, plain weave wire mesh, and twill weave wire mesh, and the grain shape and fiber length of the raw material M are taken into consideration. Then you can select the one that gives the most effect. The metal filter 11 is, for example, copper, titanium, aluminum, or stainless steel.

Hereinafter, the processing procedure in the atomizing device 100 of the present embodiment will be described.
First, the raw material M to be processed is put into the raw material tank 101 and adjusted into a slurry. Next, the raw material M in the raw material tank 101 is pressure-fed into the pressure boosting chamber of the pressure booster 103 by the liquid supply pump 102. The pressure-fed raw material M is pressurized by the pressure booster 103. Then, the pressurized raw material M is supplied to the injection chamber 104 and injected after passing through the ultra-high pressure filter 1. It should be noted that this process may be repeated not only once but also a plurality of times.

Here, the procedure for passing through the ultra-high voltage filter 1 will be described in detail.
The pressurized raw material M is filled inside the groove 3 from the inlet of the ultra-high pressure filter 1 through an internal flow path. The filled raw material M is separated so that the particles, shape, and the like are made uniform when passing through the outer peripheral portion of the metal filter 11 and the inside of the unevenness filter 10. The separated raw material M is supplied from the opening 6 to the injection chamber 104 via the through hole 5 of the filter holding portion 4.

(Verification test)
A verification test was performed on the ratio of the unevenness filter 10 and the metal filter 11. In the verification test, cellulose microfiber (100 μm) was boosted to 245 MPa with a booster, and the flow rate was 0.5? It was verified whether or not clogging occurred by injecting 5 passes from the chamber (nozzle diameter 100 μm) at / min. The results are shown in Table 1 below. The resulting symbols are expressed as 〇: passage (no clogging), △ partial passage (no significant clogging), and × (with clogging).

In Comparative Example 1, a wedge wire screen (100 μm) alone is arranged as the unevenness filter 10. In Comparative Example 2, a single metal mesh (100 μm) is arranged as the metal filter 11. In Comparative Examples 1 and 2, clogging occurred in the filter itself and the chamber.

In Examples 1 to 3, a wedge wire screen as the unevenness filter 10 and a metal mesh as the metal filter 11 have a two-layer structure. In Examples 1 to 3, as shown in Table 1, wedge wire screens are combined as 100 μm, 60 μm, 50 μm, and metal meshes are combined as 100 μm, 75 μm, and 60 μm, respectively.

In Example 1, a small amount of clogging occurred on the filter side. No clogging occurred in Example 2 and Example 3. From this, it is preferable that the mesh width (size) of the metal filter 11 which is the primary filter is larger than the uneven width (size) of the unevenness filter 10 which is the secondary filter. Specifically, the unevenness filter 10 is preferably 50 to 100 μm, and the metal filter 11 is preferably 60 to 100 μm. The size ratio of the unevenness filter 10 to the metal filter 11 is preferably 1: 1 to 1: 5, more preferably 1: 1 to 1: 3.

As described above, the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be appropriately modified without departing from the spirit of the present invention.

1 Ultra-high voltage filter 2 Main body 2a Main body flow path 2b Main body opening 3 Groove 3a Auxiliary groove 4 Filter holding part 4a Tip part 4b Filter sealing part 4c Intermediate part 5 Through hole 6 Opening 7 Fixing member 8 Filter part 9 Ring part 10 Concavo-convex filter 11 Metal filter 12 Lid member 100 Atomizer 101 Raw material tank 102 Liquid supply pump 103 Pressure booster 104 Injection chamber M Raw material

Claims (10)

An ultra-high pressure filter that sorts particles of the raw material before supplying the pressurized raw material to the injection chamber.
The main body with a groove and
A filter unit arranged in the groove portion.
Concavo-convex filter and
With a metal filter,
A two-layer structure filter unit with
The filter holding part that holds the filter part and the filter holding part
Has an ultra-high pressure filter. The metal filter is arranged on the outer periphery of the unevenness filter.
The ultrahigh pressure filter according to claim 1. Further having a lid member for sealing one end of the filter portion.
The ultrahigh pressure filter according to claim 1 or 2. The unevenness filter is a wedge wire screen.
The ultrahigh pressure filter according to any one of claims 1 to 3. The metal filter has a mesh structure.
The ultrahigh pressure filter according to any one of claims 1 to 4. The metal filter is a metal material of any one of copper, titanium, aluminum, and stainless steel.
The ultrahigh pressure filter according to any one of claims 1 to 5. The size ratio of the unevenness filter to the metal filter is 1: 1 to 1: 1.5.
The ultrahigh pressure filter according to any one of claims 1 to 6. The filter holding portion has a through hole inside and has a through hole.
At the tip of the through hole, a plurality of openings are formed in the direction perpendicular to the center line of the through hole.
The ultrahigh pressure filter according to any one of claims 1 to 7. The plurality of openings are arranged on the downstream side of the unevenness filter and the metal filter.
The ultrahigh pressure filter according to any one of claims 1 to 8. The raw material is a fibrous raw material.
The ultrahigh pressure filter according to any one of claims 1 to 9.

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