WO2020208845A1

WO2020208845A1 - Vacuum degassing machine

Info

Publication number: WO2020208845A1
Application number: PCT/JP2019/042273
Authority: WO
Inventors: 榎村眞一
Original assignee: エム・テクニック株式会社
Priority date: 2019-04-09
Filing date: 2019-10-29
Publication date: 2020-10-15

Abstract

A vacuum degassing machine that degasses material to be processed by placing a rotating rotor 30 with a screen in a vacuum vessel, introducing a liquid material to be processed into the rotor 30 from the interior thereof and causing the liquid to pass through the screen 3 to refine the same, wherein the vacuum degassing machine is characterized in that: the screen 3 is a cylinder with a circular cross-section and is in the form of a porous plate in which a plurality of through holes are opened in the radial direction of the cylindrical screen 3; and the screen 3 is provided such that the area of inflow openings is greater than the area of outflow openings, where the inflow openings are openings of a plurality of penetration portions provided on the inner wall face of the screen 3 and the outflow openings are openings of the plurality of penetration portions provided on the outer wall face of the screen. Thus, the processing capacity of the vacuum degassing machine is improved without increasing the size of the device.

Description

Vacuum deaerator

The present invention relates to a vacuum deaerator with a miniaturization device.

In the manufacturing process of various products such as pharmaceuticals, cosmetics, foods, and fine chemicals, bubbles are generated in the liquid processed product, and these bubbles cause various obstacles to product manufacturing. Therefore, the processed material is defoamed by a vacuum deaerator, and in this defoaming treatment, it is required to continuously remove air bubbles in the liquid from low viscosity to high viscosity in a vacuum state. .. In response to such problems, the following prior art documents are known as vacuum degassing machines with miniaturization devices, and even the applicant of the present application (M Technique Co., Ltd.) has made an in-house defoaming machine. Is on the market.

However, recently, there are many demands for complete defoaming of even smaller bubbles, and there remains a problem in terms of defoaming ability. The same applies to dedissolved gas, de-VOC (volatile organic compound), and the like.
In Patent Document 1, a disk having a gap cylindrical screen wall on the upper surface of the peripheral edge and an outer peripheral surface thereof are surrounded by a gap so as to close the upper part of the annular gap and the outer periphery of the disk at the lower part of the gap. A guide cylinder having an annular shape or a separate gap formed between the guide cylinders is integrally connected, and the disk is provided to rotate in a processing container held in a vacuum state, and the lower peripheral edge of the guide cylinder extends downward. The lower surface is opened, the raw material is supplied to the inside of the narrow screen wall, the lower part of the processing container is made into a funnel shape, and the lower end is used as a discharge port to form a peripheral gap inside the funnel-shaped part to form a weight piece. A vacuum type continuous centrifugal defoaming machine is described.

In the apparatus of Patent Document 1, first, the processing raw material is sprayed toward the inner week surface of the guide disk through the gap screen wall by the action of centrifugal force rotating at high speed, and at that time, it is refined and defoamed.
Secondly, it forms a layer on the inner surface of the peripheral wall of the guide cylinder and is defoamed by utilizing the difference in specific gravity of centrifugal force.
Thirdly, the bubbles are defoamed by forming a thin film along the lower peripheral wall surface of the guide cylinder and flowing down to increase the area. It is described that the bubbles are efficiently defoamed by these first to third effects.

In this case, the details are not described, but from the drawing, a commercially available wedge wire is used for the gap screen, and the gap is connected on the circumference, so a considerable gap product is required to miniaturize the processed product. Use and require high rotation for stronger centrifugal force. Further, it is essential that the defoaming ability increases as the flight distance of the processed material refined from the thin wall increases, but the flight distance is structurally reduced and thin film defoaming is expected.

According to the results of various experiments, the inventor of the present invention has found that defoaming in a flowing liquid film in vacuum is difficult in an advanced defoaming region. The most important issue of defoaming ability is whether to increase the amount. Further, the smaller the particle size is, the shorter the required flight distance is, so that the device can be miniaturized and the price can be reduced. The flight distance is the distance that the processed object discharged from the screen flies in a vacuum state and reaches the inner surface of the vessel.

Patent Document 2 states that the contact area between the treatment liquid and the vacuum is increased by increasing the number of stages of the dispersion plate to increase the defoaming rate, but the basis for increasing the defoaming rate is not sufficiently shown.

Jitsufuku No. 05-17125 Japanese Unexamined Patent Publication No. 2001-009206

That is, neither of Patent Documents 1 and 2 sufficiently responds to the above-mentioned current request.
Therefore, the present invention has been made to provide a rotary vacuum degassing machine capable of performing more advanced degassing, defoaming, degassing such as degassing from a processed material having fluidity such as liquid.

In the present invention, a rotor with a screen that rotates inside a vessel with a vacuum inside is arranged, and a liquid processed product is introduced into the rotor from the inside and passed through the screen to make the processed product finer and degas. In the machine, the screen has a cylindrical shape with a circular cross section, and a large number of through holes are formed in the radial direction of the tubular screen to form a perforated plate, and a plurality of the penetrations provided on the inner wall surface of the screen. The opening of the portion is used as an inflow opening, the openings of the plurality of through portions provided on the outer wall surface of the screen are used as outflow openings, and the opening area of the inflow opening is provided so as to be larger than the opening area of the outflow opening. The above problem is solved by providing a vacuum deaerator characterized by the above.
Further, by setting the minimum diameter of the opening of the penetrating portion of the screen to 0.01 mm or more and 1.00 mm or less, the function of enhancing the degassing effect is fulfilled.
Further, in the present invention, a rotor with a screen that rotates inside a vessel having a vacuum inside is arranged, and a liquid processed material is introduced into the rotor from the inside and passed through the screen to make the processed material finer and degas. In the air, the screen is a wedge wire provided with a plurality of slits on its circumference and a screen member located between the adjacent slits, and the screen has a cylindrical shape with a circular cross section. The openings of the plurality of slits provided on the inner wall surface of the screen are defined as inflow openings, and the openings of the plurality of slits provided on the outer wall surface of the screen are defined as outflow openings, and between the inflow opening and the outflow opening. The space of is a slit space
The circumferential width (So) of the outflow opening and the circumferential width (Si) of the inflow opening are provided so as to be larger than the circumferential width (Sm) of the slit space. The above problem is solved by providing a vacuum deaerator with a miniaturization device.
Further, by setting the minimum width of the openings of the plurality of slits of the screen to 0.01 mm or more and 1.00 mm or less, the function of enhancing the degassing effect is fulfilled.
Further, by laying a temperature adjusting mechanism on the vacuum vessel, precise degassing performance can be ensured.

INDUSTRIAL APPLICABILITY The present invention has been able to provide a vacuum deaerator in which the processed material is made finer and the function related to degassing is enhanced.
Further, the present invention has been able to provide a miniaturized device and a low price.

The internal structure explanatory drawing which shows the whole of the vacuum deaerator with the miniaturization apparatus which concerns on embodiment of this invention. (A) is a schematic perspective view showing the outer shape of the screen included in the vacuum deaerator of FIG. 1, (B) is a schematic perspective view showing a modified example of the screen, and (C) shows a further modified example of (B). Enlarged view of the main part of the communication department. (A) is an enlarged cross-sectional view of a main part of a connecting portion provided on the screen of FIG. 2 (A), and (B) to (F) are enlarged sectional views of a main part showing a modified example of the connecting portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Overview)
In this vacuum deaerator with a miniaturization device (hereinafter, simply referred to as a deaerator 100), a processed material having fluidity is introduced into the inside of the vessel 1 having a vacuum or a vacuum space close to vacuum to degas. After taking care, the processed material is continuously discharged to the outside of the vessel 1 (FIG. 1).

(Constitution)
In the deaerator 100, inside the vessel 1, a rotor 30 that rotates with respect to the vessel 1 (referred to as a rotary rotor 30 if necessary) and a miniaturization device 31 provided on the rotor 30 are provided. ing. The processed product is miniaturized by the miniaturization device 31 and degassed, and then discharged to the outside from the discharge port 14.
In the vessel 1, the miniaturization device 31 includes one or a plurality of tubular screens 3 provided on the rotor 30 and surrounding the rotation axis of the rotor 30.
By introducing the processed material into the inside of the screen 3 and passing it through the screen 3, one or both of the processed material and the air bubbles in the processed material are refined and degassed.

The screen 3 includes a plurality of spaces connecting the inside and the outside of the tubular screen 3 as a communication unit 3a (FIGS. 2A and 3A). In each connecting portion 3a, the opening on the inner wall surface side of the tubular screen 3 is the inflow opening 3b, and the opening on the outer wall surface side of the tubular screen 3 is the outflow opening 3c (FIG. 3A).
For at least one of the screens 3, at least a part of the section between the inflow opening 3b and the outflow opening 3c of each connecting portion 3a is an action space that promotes miniaturization of the processed material. The working space gradually decreases in cross-sectional area from the inflow opening 3b side toward the outflow opening 3c side.
Each configuration will be described in more detail below.

(About Vessel 1)
The vessel 1 is a container having a hermeticity kept in a high vacuum of about 5 Pa to 0.1 Pa. In this embodiment, the container body 10 and the lid 13 and the bottom 14 arranged on the upper portion thereof open and close. It is possible to join. Specifically, the container body 10 includes an upper cylindrical portion 11 and a bottom portion 12 provided below the cylindrical portion 11. In this example, the bottom 12 is a sloped bottom that is easy to drain. At the lower end of the sloped bottom 12, a discharge port 14 for discharging the processed material after the degassing treatment to the outside is provided.

A temperature adjusting mechanism 40 such as a jacket through which a temperature adjusting fluid such as hot water or cold water flows along the outer wall surface of the container body 10 is arranged. The temperature adjusting mechanism 40 may also be provided on the lid 13. The temperature adjusting mechanism 40 can be used to keep the processed material inside the vessel 1 in a predetermined temperature range, and to heat and cool the vessel if necessary. Further, the temperature adjusting mechanism 40 can also be implemented by adopting a well-known means other than the jacket.
The lid 13 is provided with a vacuum port 15 for keeping the inside of the vessel 1 in a vacuum, and the gas inside is discharged to the outside by a vacuum pump 53 connected to the vacuum port 15, so that the vessel 1 is discharged. The inside of the is in a vacuum state of a predetermined pressure.

It is desirable that the inside of the vessel 1 (container) be completely evacuated, but if degassing can be performed appropriately, the pressure may be reduced to a state close to vacuum.
The vessel 1 is provided with an introduction pipe 16 that is introduced from a source of the processed material outside the vessel 1 into the inside of the tubular screen 3 inside the vessel 1. In this example, the discharge port 16a (introduction port into the vessel 1) of the introduction pipe 16 is arranged on the central axis of the rotating tubular screen 3. In this example, the lid 13 is provided with the introduction pipe 16 for charging the processed material into the vessel 1, and the discharge port 16a at the lower end of the introduction pipe 16 is arranged on the central axis to introduce the introduction. The processed material is introduced into the vessel 1 from a supply source 51 such as a tank to which the pipe 16 is connected.
The container body 10 and the lid 13 are fixed so that the flanges provided on the two face each other to ensure airtightness under reduced pressure, thereby forming an integrated vessel 1. What position is the vessel 1? It may be divided into two parts, and the joining means can be changed as appropriate.

(About miniaturization device 31)
The miniaturization device 31 is arranged at a position corresponding to the cylindrical portion 11 of the container body 10, and includes the above-mentioned rotating rotor 30 (corresponding to the rotor in the claims) and the screen 3 (FIG. 1). ). In this example, the miniaturization device 31 includes two screens 3 of a first screen 32 and a second screen 33 (FIG. 1).
The diameter of the tubular second screen 33 is larger than the diameter of the tubular first screen 32, and the second screen 33 is arranged outside the first screen 32. In this example, the rotary rotor 30 includes a lower plate 30a and an upper plate 30b. The upper plate 30b is arranged above the lower plate 30a at intervals from the lower plate 30a. Both the lower plate 30a and the upper plate 30b are disks arranged with the board surfaces facing up and down.

In this example, the diameter of the upper plate 30b is larger than the diameter of the lower plate 30a, the first screen 32 is provided on the outer peripheral portion of the lower plate 30a and extends upward, and the second screen 33 is provided on the outer peripheral portion of the upper plate 30b. It is made and extends downward.
A tubular introduction chamber 30c is formed in the center of the lower surface of the upper plate 30b so as to be concentric with the upper plate 30b. The upper end of the tubular introduction chamber 30c is integrated with the lower surface of the upper plate 30b, and the inside of the introduction chamber 30c is in contact with the hollow portion of the donut-shaped upper plate 30b. An opening 30d for connecting the inside and outside of the introduction chamber 30c is provided on the side of the introduction chamber 30c. The center of the lower end of the introduction chamber 30c is provided with a raised portion 30e that rises downward.

At the center of the lower surface of the lower plate 30a, a tubular neck portion 30f extending downward with the center line vertical is formed. The inside of the hollow neck portion 30f communicates with the hollow portion of the donut-shaped lower plate 30a.
The raised portion 30e of the introduction chamber 30c may be rotatably fitted to the hollow portion of the lower plate 30a with respect to the lower plate 30a, and may slide with respect to the lower plate 30a to change its direction. Then, it is assumed that the raised portion 30e is attached so as not to rotate with respect to the lower plate 30a.
The drive shaft 21 of the rotor electric motor 20 is passed through the inside of the neck portion 30f, and the tip (upper end) of the drive shaft 21 is fixed to the raised portion 30e.
The drive shaft 21 of the rotor electric motor 20, which will be described later, is arranged on the center line of the tubular first screen 32 and the second screen 33 extending vertically.

The above-mentioned introduction pipe 16 penetrates the center of the lid 13 and extends downward, and the lower end, that is, the discharge port 16a is arranged in the hollow portion of the donut-shaped upper plate 30b. The processed material discharged from the discharge port 16a is introduced into the introduction chamber 30c and is rotated by the drive shaft 21 of the rotor electric motor 20 from the opening 30d of the introduction chamber 30c toward the inner peripheral surface of the first screen 32. It is released.
On the other hand, the lower plate 30a rotates by indirectly receiving the driving force of the drive shaft 21 from the raised portion 30e by contact with the raised portion 30e.
The diameter of the lower plate 30a may be larger than the diameter of the upper plate 30b, the first screen 32 may be provided on the upper plate 30b, and the second screen 33 may be provided on the lower plate 30a.

As described above, the rotary rotor 30 is rotated by the drive shaft 21, and specifically, the drive shaft 21 is rotated by the rotor electric motor 20 provided outside the bottom portion 12 via the rotor power transmission unit 23. To do.
Further, a sealing device 22 for the rotating portion is laid.
As described above, the introduction pipe 16 is arranged on the inner peripheral side of the rotary rotor 30, and the processed material is introduced toward the rotary rotor 30 from the inlet (discharge port 16a) at the tip of the introduction pipe 16. ..
The defoaming effect is enhanced by passing the processed material that has advanced in the outer peripheral direction of the rotary rotor 30 by centrifugal force through the first screen 32 and the second screen 33 that are arranged in an annular shape.

In this example, the connecting portion 3a of each screen 3 (first screen 32 and second screen 33) is a through portion, particularly a fine through hole, that is, a fine hole (FIG. 2A). In particular, in this example, the opening area (Ri) of the outflow opening 3c of the connecting portion 3a of the second screen 33 is smaller than the opening area (R0) of the inflow opening 3b. Each of the connecting portions 3a has the entire section between the inflow opening 3b and the outflow opening 3c as the above-mentioned working space (FIG. 3A).
As shown in FIG. 3A, in this example, the connecting portion 3a is narrowed in a truncated cone shape, that is, in a mortar shape, from the inflow opening 3b toward the outflow opening 3c.

The screen 3 is a perforated plate having the plurality of micropores.
The plurality of micropores (communication portion 3a) of the screen 3 may be randomly distributed on the front and back surfaces of the screen 3, but have a plurality of rows arranged vertically, horizontally or diagonally, and other regularities. It can also be implemented as a distribution. In particular, it is preferable that the fine holes are uniformly distributed on the screen 3.
The first screen 32 may also be a unique perforated plate provided with a connecting portion 3a having the above-mentioned working space like the second screen 33, but in this example, the first screen 32 is an existing punching plate (FIG. 2 (A). )) And wedge wire screens are used. Here, the first screen 32 is used as a punching plate.

Each of the connecting portions 3a has a diameter of 0.01 mm or more and 1.00 mm or less at the end of the working space on the outflow opening side, that is, the end point of the section of the working space.
In the second screen 33, as described above, the penetrating portion (communication portion 3a) gradually reduces the cross section (cross section of the surface orthogonal to the moving direction of the fluid) from the inflow opening 3b side to the outflow opening 3c side. It is a space with a narrowed tip.
The screen 3 includes a screen main portion S and the plurality of penetrating portions 3a.
In this example, the area between the penetrating portions 3 adjacent to each other in the circumferential direction of the screen 3 that coincides with the rotation direction of the rotating rotor 30 is the screen main portion S.

The number of screens 3 may be one, that is, only the second screen 33, but in this example in which one drive shaft is used, the second screen 33 has a larger centrifugal force, so that the first screen 32 is the second screen 32. It is desirable that the screen 33 is a perforated plate having large eyes (communication portion 3a). As described above, a relatively large screen such as a punching plate or a wedge wire can be used as the first screen 32, and the second screen 33 can be a uniquely formed perforated plate having a smaller eye than the punching plate or the wedge wire.

The first screen 32 may also have the micropores as the connecting portion 3a to provide the above-mentioned working space.
As described above, the openings of the plurality of penetrating portions (micropores which are the connecting portions 3a) provided on the inner wall surface of the screen 3 are defined as the inflow opening 3b, and the openings of the plurality of penetrating portions provided on the outer wall surface of the screen 3 are provided. (FIG. 3A), a second screen 33 having micropores provided so that the opening area (Ri) of the inflow opening is larger than the opening area (Ro) of the outflow opening is used. As a result, the processed material can be subdivided and the degassing performance is further increased.

The screen 3 may be implemented by using two or more screens 3 such as a third screen and a fourth screen. The processed material that has passed through the rotating rotor 30 and the second screen 33 becomes extremely small fine particles, flies under vacuum, and reaches the inner wall surface of the cylindrical portion 11. The degassing effect is maximized in the flight distance at this time.
When the processed material is made into fine particles, the smaller the size is, the larger the surface area and the smaller the distance to the center, so that complete degassing is possible. On the contrary, if it is large to some extent, the surface area is reduced, the distance between the centers is increased, and the flight time to the inner surface of the vessel 1 is shortened. Therefore, if the degassing effect is required, the end surface of the second screen 33 and the inner surface of the vessel 1 are required. It is necessary to take a large distance to the device itself, which inevitably increases the size of the device itself. Therefore, atomization of the processed product became a big problem, and the present invention was reached.

When the centrifugal force is the same, the discharge performance of the processed product depends on the area of the through hole. Therefore, with the conventional technology, it was not possible to make it extremely small, so in order to increase the centrifugal force, a large motor was required by increasing the number of revolutions.
By using the technique of the present invention, the pressure loss can be reduced, the liquid can pass smoothly, and the processed product can be atomized.

As described above, in the through hole (communication portion 3a), by making the opening area (Ro) of the inflow opening 3b larger than the opening area (Ri) of the outflow opening 3c, this device can exert a high effect of degassing. .. Further, by gradually reducing the cross-sectional area from the inflow opening 3b side to the outflow opening 3c side, the passing speed is also increased and the droplets fly as fine droplets.
In particular, in either case, the minimum diameter of the opening of the penetrating portion (communication portion 3a) of the screen 3 is set to 0.01 mm or more and 1.00 mm or less, regardless of whether the working space is provided or not. It exerts the above effect.

As the material of the screen 3, various metals such as stainless steel, resin, ceramic and the like can be used.
For any of the first and

second screens

32 and 33, a plate-shaped material may be drilled and then a cylinder may be drilled, or a cylindrical object may be drilled from the beginning. Further, the hole can be machined by etching, electroforming, laser or cutting, and a commercially available product may be used, or the hole may be round, square or hexagonal. Is.

In the example shown in FIG. 3A, the width So of the inflow opening 3b is smaller than the width Si of the outflow opening 3c in the circumferential direction of the screen 3. In this case, it is preferable that the generatrix of the connecting portion 3a, which is a truncated cone, has a narrowing angle θ (inclination angle) of 1 to 45 degrees with respect to a straight line passing through the center of the inflow opening 3b and the center of the outflow opening 3c.

(Change example)
The connecting portion 3a can be a truncated cone instead of the truncated cone, and FIG. 3B shows an example in which the connecting portion 3a is a square truncated cone. In the connecting portion 3a shown in FIG. 3B, the pair of front and rear slopes with respect to the rotation direction are the back side end 3e and the front side end 3f, and the angle between the center line and the generatrix in FIG. The same shall apply.

Further, the connecting portion 3a may be provided with a minimum cross-sectional portion 3d having a cross-sectional area smaller than that of the inflow opening 3b and the outflow opening 3c in the middle of the section from the inflow opening 3b to the outflow opening 3c (FIG. 3C). ~ (E)). Specifically, the connecting portion 3a gradually reduces the cross-sectional area from the inflow opening 3b toward the minimum cross-sectional portion 3d. Further, the penetrating portion 3a gradually increases the cross-sectional area from the minimum cross-sectional portion 3d toward the outflow opening 3c. The minimum cross-sectional portion 3d is a constriction provided in the penetrating portion 3a.

The minimum cross-sectional portion 3d may be an annular ridge having no width between the inflow opening 3b side and the outflow opening 3c side (not shown), but the minimum cross-sectional portion 3d is the inflow opening 3b side and the outflow opening 3c side. It can be carried out as a minimum diameter section having a constant width between the two (FIGS. 3C to 3E).
When the minimum cross-sectional portion 3d is provided, the outflow opening 3c may have a smaller cross-sectional area than the inflow opening 3b, or the inflow opening 3b may have a smaller cross-sectional area than the outflow opening 3c as much as possible to obtain the effect of the present invention. May be good.

In the examples shown in FIGS. 3C to 3E, the connecting portion 3a has an inflow opening 3b and an outflow in the middle of the section from the inflow opening 3b to the outflow opening 3c in the circumferential direction r (rotational direction) of the screen 3. A minimum cross-sectional portion 3d having a width Sm smaller than that of the opening 3c is provided. Specifically, in the circumferential direction of the screen 3, the connecting portion 3a gradually reduces the width from the inflow opening 3b toward the minimum cross-sectional portion 3d. Further, in the circumferential direction r of the screen 3, the connecting portion 3a gradually increases the width from the minimum cross-sectional portion 3d toward the outflow opening 3c.
As a modification of FIG. 3C, as shown in FIG. 3F, the outflow opening 3c may be the end (outflow side end) of the minimum cross-sectional portion 3d.

The connecting portion 3a may have a circular cross section from the inflow opening 3b to the outflow opening 3c as described above, that is, a drum shape (FIG. 3C), or the cross section of the entire section may be a quadrangle (FIG. FIG. 3 (D).
Further, when the cross-sectional shape of the entire section of the connecting portion 3a is a quadrangle, the ratio of the sides of the quadrangle may be changed vertically and horizontally (FIG. 3 (E)).
The connecting portion 3a of FIG. 3 (E) may be a hole, but it is suitable to be implemented as a slit (notch).

For the connecting portion 3a having the minimum cross-sectional portion 3d, if the cross-sectional area is gradually reduced (providing a working space) from the inflow opening 3b toward the minimum cross-sectional portion 3d, and for the connecting portion 3a not having the minimum cross-sectional portion 3d. In any case, if the cross-sectional area is gradually reduced from the inflow opening 3b to the outflow opening 3c (providing a working space), the cross section of the entire section of the connecting portion 3a should be a triangle or a polygon of a pentagon or more. It may be a curved shape other than a circle, or a combination of a curved line and a straight line, and further, there may be a section having a cross-sectional shape different from that of other sections in the entire section of the connecting portion 3a. Various changes are possible.

Further, the screen 3 (second screen 33) is not limited to the one provided with fine through holes, and a wedge wire screen using a wedge wire may be adopted as described above (FIG. 2B). (C)). A wedge wire is a wire having a wedge-shaped cross section.
When adopting a wedge wire screen, it is necessary to use the finest gap. Each wedge wire may extend in the circumferential direction r of the screen 3 (FIG. 2 (C)) or in the vertical direction (FIG. 2 (B)) in the example shown in FIG. 2 (B). , The individual wedge wires are the screen main parts S described above.

Assuming that the wedge wire extends in the circumferential direction r, the connecting portions 3a extend continuously in the circumferential direction r. Therefore, a plurality of connecting portions 3a provided on the inner wall surface of the screen 3 are used as slit spaces. The circumferential width (So) of the outflow opening 3c and the circumferential width (Si) of the inflow opening 3b need to be provided so as to be larger than the circumferential width (Sm) of the slit space (FIG. 2 (FIG. 2). C)). The purpose of this is to reduce the flow path because the gap is continuous, then expand the flow path to cut off the continuous flow and make the particles finer. This overcomes the disadvantages of continuous gaps.

In this case, if the minimum vertical width of the plurality of slit spaces (communication portions 3a) of the screen 3 is 0.01 mm or more and 1.00 mm or less, the effect is more effective.

Further, unlike the example of FIG. 1, the discharge port 16a of the introduction pipe 16 may be arranged at an eccentric position off the central axis of the rotating tubular screen 3 (not shown).
Further, in the example of FIG. 1, the power unit such as the rotor electric motor 20 is arranged below the rotary rotor 30, so that the introduction pipe 16 is routed on the central axis of the rotary rotor 30 from above the rotary rotor 30. Although it is possible, by arranging the introduction pipe 16 at a position deviated from the central axis of the rotary rotor 30 as described above, the power unit can be arranged above the rotary rotor 30. By arranging the power unit above the rotary rotor 30, the drive shaft 21 is provided with an extension portion (rotary shaft) extending downward from the rotary rotor 30, and a rotary discharge blade is provided on the extension portion. It is also possible to enhance the continuous discharge function from the discharge port 14 of the defoamed processed product (not shown).

Specifically, the lower portion of the container body 10 is formed in a funnel shape that tapers downward to form a funnel portion, the discharge port 14 is provided at the lowermost portion of the funnel portion, and the rotary discharge blade is provided with the rotary discharge blade having its side end to the funnel. A spiral plate-like body along the inner peripheral surface of the portion and with the front and back plate surfaces facing up and down, and the rotation of the extension portion through the center line of the spiral plate-like body via a rod-shaped support. Fix the discharge blade. As the extension portion rotates, the spiral rotary discharge blade rotates to continuously move the processed material downward along the inner peripheral surface of the funnel portion, and continuously moves the processed material downward from the discharge port 14 to the outside of the vessel 1. The processed material can be discharged to the helix.

1 Vessel 3 Screen

3a Communication part

3b Inflow opening 3c Outflow opening 10 Container body 11 Cylindrical part 12 Bottom
13 Lid body 14 Discharge port 15 Vacuum port
16 Introductory pipe 16a (introductory pipe 8) Discharge port 20 Rotor motor 21 Drive shaft 22 Sealing device 23 Rotor power transmission unit 30 Rotating rotor (rotor)

30a Lower plate

30b Upper plate 30c Introductory chamber 30d Opening 30e Raised part 30f Neck 31 Miniaturizing device 32 First screen 33 Second screen 40 Temperature control mechanism 51 Source 52 Vacuum pump 100 (vacuum) Deaerator S screen main part

Claims

In a vacuum deaerator in which a rotor with a screen that rotates inside a vacuum vessel is arranged, and a liquid processed material is introduced into the rotor from the inside and passed through the screen to make the processed material finer and degas.
The screen has a cylindrical shape with a circular cross section, and has a perforated plate shape having a large number of through holes in the radial direction of the tubular screen.
The openings of the plurality of penetrations provided on the inner wall surface of the screen are defined as inflow openings, and the openings of the plurality of penetrations provided on the outer wall surface of the screen are defined as outflow openings.
The opening area (Ri) of the inflow opening is the opening area (Ro) of the outflow opening.
A vacuum deaerator characterized by being installed so as to be larger than.
The vacuum deaerator according to claim 1, wherein the minimum diameter of the opening of the through portion of the screen is 0.01 mm or more and 1.00 mm or less.
In a vacuum deaerator in which a rotor with a screen that rotates inside a vacuum vessel is arranged, and a liquid processed material is introduced into the rotor from the inside and passed through the screen to make the processed material finer and degas.
The screen is a wedge wire having a plurality of slits on its circumference and a screen member located between the adjacent slits, and the screen has a cylindrical shape with a circular cross section.
The openings of the plurality of slits provided on the inner wall surface of the screen are defined as inflow openings, and the openings of the plurality of slits provided on the outer wall surface of the screen are defined as outflow openings, and between the inflow opening and the outflow opening. The space of is a slit space
The circumferential width (So) of the outflow opening and the circumferential width (Si) of the inflow opening are provided so as to be larger than the circumferential width (Sm) of the slit space. Vacuum deaerator with miniaturization device.
The vacuum deaerator according to claim 3, wherein the minimum width of the openings of the plurality of slits of the screen is 0.01 mm or more and 1.00 mm or less.
The vacuum deaerator according to claim 1 to 4, wherein a temperature adjusting mechanism is laid on the vacuum vessel.