JP7403167B2 - vacuum deaerator - Google Patents

Description

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

BACKGROUND OF THE INVENTION During the manufacturing process of various products such as pharmaceuticals, cosmetics, foods, and fine chemicals, air bubbles are generated in liquid processed materials, and these air bubbles pose various obstacles to product manufacturing. For this reason, the processed material is degassed using a vacuum deaerator, but this degassing process requires continuous removal of air bubbles from low to high viscosity liquids under vacuum. . In response to such problems, the following prior art documents are known as vacuum deaerators equipped with atomization devices, and the applicant of the present application (M Technique Co., Ltd.) has also developed an in-house deaerator. is being introduced into the market.

However, recently there has been a growing demand for complete defoaming down to even the smallest bubbles, and issues remain in terms of defoaming ability. The same applies to removing dissolved gases and removing VOCs (volatile organic compounds).
Patent Document 1 discloses a disk having a narrow cylindrical screen wall on the upper surface of its periphery, surrounding the outer circumferential surface with a gap, closing the upper part of the annular gap, and connecting the outer periphery of the disk at the lower part of the gap. A guide cylinder having an annular shape and a separate gap formed therebetween is integrally connected, and the disk is rotated in a processing container kept in a vacuum state, and the lower peripheral edge of the guide cylinder is extended downward. The lower surface of the processing vessel is opened, raw materials are supplied inside the slit screen wall, the lower part of the processing vessel is shaped like a funnel, the lower end of which is used as a discharge port, and a surrounding gap is formed inside the funnel-shaped part to form a weight piece. A vacuum continuous centrifugal defoaming machine is described.

In the apparatus of Patent Document 1, the raw material to be treated is first blown toward the inner surface of the guide disk through the slit screen wall by the centrifugal force of high-speed rotation, and is atomized and defoamed at that time.
Second, it forms a layer on the inner surface of the circumferential wall of the guide cylinder and is degassed using the difference in specific gravity due to centrifugal force.
Thirdly, the gas flows down in the form of a thin film along the lower circumferential wall surface of the guide cylinder, and as the area becomes larger, the gas is degassed. It is described that these first to third effects result in efficient defoaming.

Although the details are not described in this case, it is clear from the drawing that a commercially available wedge wire is used for the slit screen, and the gaps are connected on the circumference, so a considerable amount of slit material is required to make the processed material finer. and requires high rotation for stronger centrifugal force. Furthermore, although the essence is that the greater the flight distance of the finely processed material from the thin wall, the greater the defoaming ability, it is expected that thin film defoaming will be achieved by reducing the flight distance due to the structure.

The inventor of the present invention has found through various experimental results that degassing in a falling liquid film in a vacuum is difficult in a highly degassing region. The most important issue regarding defoaming ability is whether it can be further increased. Furthermore, the smaller the particle diameter is, the shorter the required flight distance becomes, which allows the device to be made smaller and cheaper. The flight distance refers to the distance that the processed material discharged from the screen flies in a vacuum state and reaches the inner surface of the vessel.

Patent Document 2 states that the degassing rate is increased by increasing the contact area between the processing liquid and the vacuum by using multiple stages of dispersion disks, but does not sufficiently show the basis for increasing the degassing rate.

Publication number 05-17125 Japanese Patent Application Publication No. 2001-009206

That is, neither Patent Documents 1 nor 2 satisfactorily meet the above-mentioned current demands.
Therefore, the present invention aims to provide a rotary vacuum deaerator capable of performing more advanced degassing such as degassing, defoaming, and VOC removal from a process material having fluidity such as liquid.

The present invention provides vacuum degassing, in which a rotor with a screen that rotates is arranged in a vessel with a vacuum inside, and a liquid to be treated is introduced into the rotor from the inside and passed through the screen to atomize and deaerate the treated substance. In the machine, the screen has a cylindrical shape with a circular cross section, and has a perforated plate shape with a number of through holes formed in the radial direction of the cylindrical screen, and the screen has a plurality of through holes provided on the inner wall surface of the screen. The openings of the portions are defined as inflow openings, the openings of the plurality of through-holes provided on the outer wall surface of the screen are defined as outflow openings, and the opening area of the inflow openings is provided to be larger than the opening area of the outflow openings. The above problems are solved by providing a vacuum deaerator characterized by:
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 deaeration effect is achieved.
Further, the present invention provides a vacuum decomposition system in which a rotating rotor with a screen is arranged in a vessel with a vacuum inside, and the liquid to be treated is introduced from the inside to the rotor and passed through the screen to atomize and deaerate the to-be-treated material. In the air machine, 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, the openings of the plurality of slits provided in the outer wall surface of the screen are defined as outflow openings, and between the inflow opening and the outflow opening Let the space be the slit space,
The circumferential width (So) of the outflow opening and the circumferential width (Si) of the inflow opening are set to be larger than the circumferential width (Sm) of the slit space. The above problems are solved by providing a vacuum deaerator with a characteristic micronization device.
Furthermore, the minimum width of the openings of the plurality of slits in the screen is set to 0.01 mm or more and 1.00 mm or less, thereby enhancing the deaeration effect.
Further, by installing a temperature adjustment mechanism in the vacuum vessel, precise deaeration performance can be ensured.

The present invention has been able to provide a vacuum deaerator that can further refine the processed material and has enhanced functions related to deaeration.
Further, the present invention makes it possible to provide a compact and low-cost device.

FIG. 1 is an explanatory diagram of an internal structure showing the entire vacuum deaerator with a micronization device according to an embodiment of the present invention. (A) is a schematic perspective view showing the outer shape of the screen provided in the vacuum deaerator of FIG. 1, (B) is a schematic perspective view showing a modified example of the screen, and (C) is a further modified example of (B). Enlarged view of the main parts of the communication section. (A) is an enlarged cross-sectional view of a main part of a communication section provided in the screen of FIG.

Embodiments of the present invention will be described below based on the drawings.
(overview)
This vacuum deaerator with atomization device (hereinafter simply referred to as the deaerator 100) degasses by introducing a fluid to be treated into the inside of a vessel 1 whose interior is a vacuum or a reduced pressure space close to a vacuum. After the treatment, the treated material is continuously discharged out of the vessel 1 (Fig. 1).

(composition)
In this deaerator 100, a rotor 30 that rotates with respect to the vessel 1 (referred to as a rotating rotor 30 as necessary) and a micronization device 31 provided on the rotor 30 are provided inside the vessel 1. ing. The processed material is pulverized and deaerated by the pulverizer 31 and then discharged to the outside from the discharge port 14 .
In the vessel 1, the atomization device 31 includes one or more cylindrical screens 3 that are provided on the rotor 30 and surround the rotation axis of the rotor 30.
By introducing the treated material into the inside of the screen 3 and passing it through the screen 3, one or both of the treated material and the bubbles in the treated material are made fine and degassed.

The screen 3 includes a plurality of spaces as communication portions 3a that communicate the inside and outside of the cylindrical screen 3 (FIGS. 2(A) and 3(A)). In each communication portion 3a, the opening on the inner wall side of the cylindrical screen 3 is defined as an inflow opening 3b, and the opening on the outer wall side of the cylindrical screen 3 is defined as an outflow opening 3c (FIG. 3(A)).
Regarding 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 communication portion 3a is an action space that promotes the miniaturization of the processed material. The cross-sectional area of the working space gradually decreases from the inflow opening 3b side to the outflow opening 3c side.
Each configuration will be described in more detail below.

(About Vessel 1)
The vessel 1 is an airtight container that can be maintained at a high vacuum of about 5 Pa to 0.1 Pa, and in this embodiment, a container body 10 and a lid 13 disposed on the top thereof are connected to each other so as to be openable and closable. It is what was done. 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 for easy drainage. A discharge port 14 is provided at the lower end of the sloped bottom portion 12 for discharging the processed material after the deaeration process to the outside.

A temperature adjustment mechanism 40 such as a jacket for flowing a temperature adjustment fluid such as hot water or cold water along the outer wall surface of the container body 10 is arranged. Note that the temperature adjustment mechanism 40 may also be provided on the lid 13. This temperature adjustment mechanism 40 can be used to maintain the processed material inside the vessel 1 within a predetermined temperature range, or to heat and cool it as necessary. Further, the temperature adjustment mechanism 40 can be implemented by employing known means other than the jacket described above.
The lid body 13 is provided with a vacuum port 15 for keeping the inside of the vessel 1 in a vacuum, and a vacuum pump 52 connected to the vacuum port 15 discharges the gas inside the vessel 1 to the outside. The interior of the is in a vacuum state at a predetermined pressure.

Although it is desirable that the interior of the vessel 1 (container) be in a complete vacuum, it may be in a reduced pressure state close to vacuum as long as degassing can be performed appropriately.
The vessel 1 is equipped with an introduction pipe 16 that introduces the treated material from a supply source outside the vessel 1 into the inside of the cylindrical screen 3 inside the vessel 1 . In this example, the discharge port 16a (the introduction port into the vessel 1) of the introduction pipe 16 is arranged on the central axis of the rotating cylindrical screen 3. In this example, the lid 13 is provided with the introduction pipe 16 for introducing 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. The material to be treated is introduced into the vessel 1 from a supply source 51 such as a tank connected to the pipe 16.
The container main body 10 and the lid 13 are fixed with flanges provided on both facing each other to ensure airtightness under reduced pressure, thereby constructing an integrated vessel 1. However, where is the vessel 1 located? It does not matter if it is divided into two parts, and the joining method can be changed as appropriate.

(About the miniaturization device 31)
The atomization device 31 is disposed at a position corresponding to the cylindrical portion 11 of the container body 10, and includes the aforementioned rotating rotor 30 (corresponding to the rotor in the claims) and a screen 3 (FIG. 1). ). In this example, the micronization device 31 includes two screens 3, a first screen 32 and a second screen 33 (FIG. 1).
The diameter of the cylindrical second screen 33 is larger than the diameter of the cylindrical first screen 32, and the second screen 33 is disposed outside the first screen 32. In this example, the rotating rotor 30 includes a lower plate 30a and an upper plate 30b. The upper plate 30b is arranged above the lower plate 30a with a space therebetween. Both the lower side plate 30a and the upper side plate 30b are disks arranged with their surfaces facing upward and downward.

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 periphery of the lower plate 30a and extends upward, and the second screen 33 is provided on the outer periphery of the upper plate 30b. and extends downward.
A cylindrical 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 cylindrical introduction chamber 30c is integrated with the lower surface of the upper plate 30b, and the inside of the introduction chamber 30c communicates with the hollow portion of the donut-shaped upper plate 30b. An opening 30d that communicates 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 protrusion 30e that protrudes downward.

A cylindrical neck portion 30f is formed at the center of the lower surface of the lower plate 30a and extends downward with the center line vertical. The inside of the hollow neck portion 30f communicates with the hollow portion of the donut-shaped lower plate 30a.
The protruding portion 30e of the introduction chamber 30c may be fitted into the hollow portion of the lower plate 30a so as to be rotatable relative to the lower plate 30a, and may be slidable relative to the lower plate 30a, but in this example Here, it is assumed that the raised portion 30e is attached to the lower plate 30a so as not to rotate.
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.
A drive shaft 21 of a rotor electric motor 20, which will be described later, is arranged on the center line of the vertically extending cylindrical first screen 32 and second screen 33.

The aforementioned introduction pipe 16 extends downward through the center of the lid body 13, and its lower end, that is, the discharge port 16a, is arranged in the hollow part 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. released.
On the other hand, the lower plate 30a rotates by indirectly receiving the driving force of the drive shaft 21 from the raised part 30e through contact with the raised part 30e.
Note that the diameter of the lower plate 30a may be larger than the diameter of the upper plate 30b, and 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 mentioned above, the rotating rotor 30 is rotated by the drive shaft 21. Specifically, the drive shaft 21 is rotated by the rotor electric motor 20 provided outside the bottom portion 12 via the rotor power transmission section 23. do.
A sealing device 22 for the rotating part is also installed.
As described above, the introduction pipe 16 is arranged on the inner peripheral side of the rotating rotor 30, and the processed material is introduced toward the rotating rotor 30 from the input port (discharge port 16a) at the tip of the introduction pipe 16. .
The defoaming effect is enhanced by the process material progressing toward the outer circumferential direction of the rotating rotor 30 due to centrifugal force and passing through the first screen 32 and second screen 33 which are arranged in an annular manner.

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

The screen 3 is a perforated plate having a plurality of the above-mentioned micropores.
The plurality of micropores (connection portions 3a) of the screen 3 may be randomly distributed on the front and back surfaces of the screen 3, but may have a plurality of rows arranged vertically and horizontally or diagonally or with other regularity. It can also be implemented as a distribution. In particular, it is preferable that the fine pores are uniformly distributed in the screen 3.
Like the second screen 33, the first screen 32 may also be a unique perforated plate equipped with the communication section 3a having the above-mentioned working space, but in this example, the first screen 32 can be replaced with an existing punching plate (see FIG. 2). A)) or wedge wire screen is adopted. Here, the first screen 32 is a punching plate.

Each of the communication parts 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 that is the working space.
In the second screen 33, as described above, the penetration part (the communication part 3a) has a cross section (a cross section perpendicular to the moving direction of the fluid) that gradually decreases from the inflow opening 3b side to the outflow opening 3c side. It is a narrow space.
The screen 3 includes a screen main portion S and the plurality of penetration 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 rotational direction of the rotating rotor 30 is the screen main portion S.

There may be one screen 3, that is, only the second screen 33, but in this example where there is only one drive shaft, the second screen 33 has a larger centrifugal force, so the first screen 32 is replaced with the second screen 33. It is desirable that the screen 33 be a perforated plate with large openings (communication portions 3a). As described above, the first screen 32 may be a relatively large screen such as a punching plate or wedge wire, and the second screen 33 may be a uniquely formed perforated plate with smaller mesh than the punching plate or wedge wire.

Incidentally, the first screen 32 may also be provided with the above-mentioned working space using micropores as the communication portions 3a.
As mentioned above, the openings of the plurality of penetration parts (microholes that are the communication parts 3a) provided on the inner wall surface of the screen 3 are defined as the inflow openings 3b, and the openings of the plurality of penetration parts provided on the outer wall surface of the screen are defined as the inflow openings 3b. is the outflow opening 3c (FIG. 3(A)), and a second screen 33 is provided with fine holes provided so that the opening area (Ri) of the inflow opening is larger than the opening area (Ro) of the outflow opening. By using it, the material to be treated can be divided into smaller pieces, further increasing the degassing performance.

Note that the screen 3 may be implemented 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 particles, flies under vacuum, and reaches the inner wall surface of the cylindrical portion 11. At this time, the deaeration effect becomes most apparent in the flight distance.
When the processed material is made into fine particles, the smaller the particles, the larger the surface area and the smaller the distance to the center, which makes complete degassing possible. On the other hand, if the screen is large to some extent, the surface area will decrease and the distance between the center will increase, and the flight time to the inner surface of the vessel 1 will become shorter. Since it is necessary to provide a large distance to the terminal, the size of the device itself cannot be avoided. Therefore, atomization of the processed material became a big problem, and the present invention was developed.

When the centrifugal force is the same, the discharge performance of the processed material depends on the area of the through hole. Therefore, with conventional technology, it was not possible to make it extremely small, so in order to increase the centrifugal force, it was necessary to increase the rotation speed and use a large motor.
By using the technology of the present invention, it was possible to reduce pressure loss, allow liquid to pass through smoothly, and achieve atomization of the processed material.

As mentioned above, by making the opening area (Ro) of the inflow opening 3b larger than the opening area (Ri) of the outflow opening 3c in the through hole (communication part 3a), this device can exhibit a high deaeration effect. . Moreover, by making the cross-sectional area gradually decrease from the inflow opening 3b side to the outflow opening 3c side, the passing speed increases and the droplets fly as fine droplets.
In particular, it will be even better if the minimum diameter of the opening of the penetrating part (communication part 3a) of the screen 3 is set to 0.01 mm or more and 1.00 mm or less, regardless of whether the screen 3 is equipped with the above-mentioned working space or not. Demonstrates the above effects.

The screen 3 can be made of various metals such as stainless steel, resin, ceramic, etc.
For both the first and second screens 32 and 33, holes may be formed in a plate-shaped material and then formed into a cylindrical shape, or holes may be formed in a cylindrical material from the beginning. In addition, the hole processing of the through-hole can be done by etching, electroforming, laser processing, or cutting, and commercially available products can also be used, and the hole can be formed into shapes such as round, square, or hexagonal. It is.

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

(Example of change)
The connecting portion 3a may be a truncated pyramid instead of the truncated cone, and FIG. 3(B) is an example in which the connecting portion 3a is a truncated square pyramid. In the connecting portion 3a shown in FIG. 3(B), a pair of front and rear slopes with respect to the rotation direction are the rear end 3e and the front end 3f, and the included angle with respect to the center line is the generatrix of FIG. 3(A). The same shall apply.

Further, the communication portion 3a can be implemented as having a minimum cross-sectional portion 3d having a smaller cross-sectional area than 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. 3(C)). ～(E)). Specifically, the cross-sectional area of the communication portion 3a gradually decreases from the inflow opening 3b toward the minimum cross-sectional portion 3d. Furthermore, the cross-sectional area of the penetrating portion 3a gradually increases from the minimum cross-sectional portion 3d toward the outflow opening 3c. The minimum cross-sectional portion 3d is a constriction provided within the penetrating portion 3a.

The minimum cross-sectional portion 3d may be a circular ridge having no width between the inflow opening 3b side and the outflow opening 3c side (not shown); This can be implemented as a minimum diameter section with a constant width between them (FIGS. 3(C) to (E)).
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 long as the effects of the present invention can be obtained. Good too.

In the example shown in FIGS. 3(C) to 3(E), in the circumferential direction r (rotational direction) of the screen 3, the communication portion 3a is located between 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. A minimum cross-sectional portion 3d having a width Sm smaller than the opening 3c is provided. Specifically, in the circumferential direction of the screen 3, the width of the communication portion 3a gradually decreases from the inflow opening 3b toward the smallest cross-sectional portion 3d. Further, in the circumferential direction r of the screen 3, the width of the communication portion 3a gradually increases from the minimum cross-sectional portion 3d toward the outflow opening 3c.
As a modification of FIG. 3(C), as shown in FIG. 3(F), the outflow opening 3c may be the end (outflow side end) of the minimum cross-sectional portion 3d.

The cross section of the entire section from the inflow opening 3b to the outflow opening 3c of the communication part 3a may be circular as described above, that is, it may be drum-shaped (FIG. 3(C)), or the cross section of the entire section may be square ( Figure 3(D)).
Further, even when the cross-sectional shape of the entire section of the communication portion 3a is a quadrangle, the ratio of the sides of the quadrangle may change in length and width (FIG. 3(E)).
The communication portion 3a in FIG. 3(E) may be a hole, but is preferably 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 from the inflow opening 3b toward the minimum cross-sectional portion 3d (having an action space), 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 (provided with a working space), the cross section of the entire section of the communication part 3a can be made into a triangle or a polygon of pentagon or more. It may be a curved shape other than a circle or a combination of a curved line and a straight line.Furthermore, there may be a section in the entire section of the connecting portion 3a whose cross-sectional shape is different from other sections. Various modifications are possible.

Furthermore, the screen 3 (second screen 33) is not limited to one with fine through holes, and a wedge wire screen using wedge wire as described above may be adopted (see FIG. 2(B)). (C)). A wedge wire is a wire with a wedge-shaped cross section.
If wedge wire screens are used, narrower gaps must be used. Each wedge wire may extend in the circumferential direction r of the screen 3 (FIG. 2(C)), or may extend in the vertical direction (FIG. 2(B)).The example shown in FIG. 2(B) In this case, each wedge wire is the screen main portion S described above.

If the wedge wire extends in the circumferential direction r, the connecting portions 3a extend continuously in the circumferential direction r, so the plural connecting portions 3a provided on the inner wall surface of the screen 3 are connected to the slit space. The vertical width (So) of the outflow opening 3c and the vertical width (Si) of the inflow opening 3b must be larger than the vertical width (Sm) of the slit space (Fig. 2(C)). The purpose of this is to reduce the flow path because the gap is continuous, and then expand the flow path to interrupt the continuous flow and perform atomization. This overcomes the disadvantages of continuous gaps.

In this case, the effect will be more effective 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.

Further, unlike the example shown in FIG. 1, the discharge port 16a of the introduction pipe 16 may be arranged at an eccentric position off the center axis of the rotating cylindrical 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 rotating rotor 30, so that the introduction pipe 16 can be routed from above the rotating rotor 30 onto the central axis of the rotating rotor 30. However, by arranging the introduction pipe 16 at a position off the center axis of the rotating rotor 30 as described above, the power unit can be arranged above the rotating rotor 30. By arranging the power unit above the rotating rotor 30, the drive shaft 21 is provided with an extending portion (rotating shaft) extending downward from the rotating rotor 30, and a rotating discharge vane is provided in the extending portion, It is also possible to enhance the continuous discharge function of the defoamed processed material from the discharge port 14 (not shown).

Specifically, the lower part of the container body 10 is formed into a funnel shape that tapers downward to form a funnel part, the discharge port 14 is provided at the lowest part of the funnel part, and the rotary discharge blade has its side end connected to the funnel part. A spiral plate-like body along the inner circumferential surface of the part and with the front and back plate surfaces facing up and down, and the rotation is carried out through a rod-shaped support to the extending part passing through the center line of the spiral plate-like body. Fix the discharge vane. As the extension part rotates, the spiral discharge blade rotates and continuously moves the processed material downward along the inner circumferential surface of the funnel part, so that the material is continuously transported from the discharge port 14 to the outside of the vessel 1. The processed material can be discharged to.

1 Vessel 3 Screen 3a Communication part 3b Inflow opening 3c Outflow opening 10 Container body 11 Cylindrical part 12 Bottom part
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 section 30 Rotating rotor (rotor)
30a Lower plate 30b Upper plate 30c Introduction chamber 30d Opening 30e Protuberance 30f Neck 31 Atomization device 32 First screen 33 Second screen 40 Temperature adjustment mechanism 51 Supply source 52 Vacuum pump 100 (vacuum) deaerator S Screen main part

Claims (6)

In a vacuum deaerator, a rotating rotor with a screen is arranged in a vessel with a vacuum inside, and a liquid processed material is introduced into the rotor from the inside and passed through the screen to atomize and degas the processed material,
The screen is a perforated punching plate having a cylindrical shape with a circular cross section and having a large number of through holes at least in the circumferential direction of the cylindrical screen,
The openings of the plurality of through holes provided in the inner wall surface of the screen are defined as inflow openings, and the openings of the plurality of through holes provided in the outer wall surface of the screen are defined as outflow openings,
The through hole is formed into a truncated cone shape or a truncated quadrangular pyramid shape, and the opening area (Ri) of the inflow opening is larger than the opening area (Ro) of the outflow opening, and the inflow opening has a circular truncated pyramid shape. The circumferential width (Si) is set to be larger than the circumferential width (So) of the outflow opening, and the cross-sectional area of the through hole gradually increases from the inflow opening to the outflow opening. By tilting the front and rear surfaces of the through hole with respect to a straight line passing through the center of the inflow opening and the center of the outflow opening, with the rotational direction of the screen being the front-back direction, the through-hole A vacuum deaerator with an atomization device, characterized in that the width in the circumferential direction of the vacuum deaerator is gradually reduced from the inflow opening to the outflow opening. The vacuum deaerator according to claim 1, wherein the minimum diameter of the opening of the through hole of the screen is 0.01 mm or more and 1.00 mm or less. In a vacuum deaerator, a rotor with a screen that rotates in a vessel with a vacuum inside is arranged, and a liquid processed material is introduced into the rotor from the inside and passed through the screen to atomize and degas the processed material,
The screen is a wedge wire screen that includes a plurality of slits on its circumference and a wedge wire that is the main part of the screen located between the adjacent slits,
The screen has a cylindrical shape with a circular cross section,
Each of the plurality of wedge wires extends in the axial direction of the rotating cylindrical screen,
The openings of the plurality of slits provided on the inner wall surface of the screen are defined as inflow openings, the openings of the plurality of slits provided in the outer wall surface of the screen are defined as outflow openings, and between the inflow opening and the outflow opening Equipped with a slit space,
The circumferential width (Si) of the inflow opening is set to be larger than the circumferential width (Sm) of the slit space, and in the section from the inflow opening to the slit space, the screen By inclining each of the front and rear surfaces of the slit with respect to a straight line passing through the center of the inflow opening and the center of the outflow opening, with the rotational direction being the front-back direction, the slit is formed from the inflow opening to the slit space. A vacuum deaerator with a micronization device, characterized in that the width in the circumferential direction is gradually reduced toward the target. 4. The vacuum deaerator according to claim 3, wherein the minimum width of the openings of the plurality of slits in the screen is 0.01 mm or more and 1.00 mm or less. 5. The vacuum deaerator according to claim 1, wherein a temperature adjustment mechanism is installed in the vacuum vessel. In a vacuum deaerator, a rotating rotor with a screen is arranged in a vessel with a vacuum inside, and a liquid processed material is introduced into the rotor from the inside and passed through the screen to atomize and degas the processed material,
The screen is a perforated punching plate having a cylindrical shape with a circular cross section and having a large number of through holes at least in the circumferential direction of the cylindrical screen,
The openings of the plurality of through holes provided in the inner wall surface of the screen are defined as inflow openings, and the openings of the plurality of through holes provided in the outer wall surface of the screen are defined as outflow openings,
The through hole includes a minimum cross-sectional portion having a smaller cross-sectional area than the inflow opening in the middle of a section from the inflow opening to the outflow opening,
The opening area (Ri) of the inflow opening is set to be larger than the cross-sectional area of the minimum cross-section portion, and the width (Si) of the inflow opening in the circumferential direction is set to be larger than the circumference of the minimum cross-section portion. The cross-sectional area of the through hole is provided so as to be larger than the width (Sm) in the direction, and the cross-sectional area of the through hole gradually decreases from the inflow opening to the minimum cross-sectional part, and the rotation direction of the screen is the front-back direction, By slanting both the front and rear surfaces of the through hole from the inflow opening to the minimum cross section with respect to a straight line passing through the center of the inflow opening and the center of the outflow opening , the circumferential direction of the through hole is A vacuum deaerator with a micronization device that reduces the width sequentially from the inflow opening toward the minimum cross-section portion.

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