WO2014010062A1

WO2014010062A1 - Degassing method and device for same

Info

Publication number: WO2014010062A1
Application number: PCT/JP2012/067836
Authority: WO
Inventors: 荒井孝一
Original assignee: 株式会社荒井鉄工所
Priority date: 2012-07-12
Filing date: 2012-07-12
Publication date: 2014-01-16
Also published as: JPWO2014010062A1; JP6012730B2

Abstract

Provided are a novel degassing method and a device for the same that can deaerate efficiently by disposing an element provided with a large number of pores and providing a gas scraping processing mechanism that slides along a porous surface, and by having a reduced pressure adjustment tube constitution that can vary a reduced pressure state within a reduced pressure air suction means and a vacuum vessel by combining and expanding gases and expanding the size of bubbles when a liquid containing bubbles passes through the pores.

Description

Defoaming method and apparatus

The present invention includes various foods such as milk, soy milk and fruit juice, health supplements or nutrients, pharmaceuticals such as drinks, cosmetics such as facial liquids and hair washing materials, paints, battery pastes, other polymer resins, etc. The present invention relates to a defoaming method and apparatus for mechanically eliminating bubbles mixed in various liquid materials including a viscous liquid material.

The inclusion of bubbles in the production process of various liquid foods, chemical products, pharmaceuticals, etc. is accompanied by many adverse effects such as product volume error, quality degradation, and deterioration. Processing steps such as gas and deaeration are incorporated.

The air bubbles mixed or generated in the manufacturing process of the liquid product are effectively eliminated, and many configurations and devices are known.

For example, a defoaming apparatus or method called a cyclone or a centrifugal separation system is known (see, for example, Patent Document 1 and Patent Document 2).

JP 2006-27012 A JP 10-43293 A

In each of

Patent Documents

1 and 2 described above, when introducing the foam-containing liquid into the container, the bubbles are separated by swirling in the circumferential direction and arranging a mesh plate as a closing plate in the swirling flow passage. In the center, a cylindrical filter body is arranged to separate bubbles and separate from the liquid to remove bubbles, and the deaeration is restricted simply by the mesh size and the size of the filter body. This problem is inevitable.

The present invention has been made paying attention to the above points, and is not simply a mesh or a filter body, but is provided with an element having pores and a bubble scratch that slides on the pore surface. Pressure reduction that can change the decompression state in the decompression air intake means and the decompression vessel at the time of passage by enlarging and enlarging the gas when the foam-containing liquid passes through the pores by interposing the treatment process It is an object of the present invention to provide a novel defoaming method and apparatus capable of efficiently degassing with an adjustment tube configuration.

The present invention can solve the above problems by providing the following configuration.

(1) a foam-containing liquid supply step of pressure-transferring the foam-containing liquid toward the wall surface having pores;
A bubble expanding step for collecting and expanding bubbles in the pores of the wall;
A deaeration / intake / exhaust treatment step of sucking and exhausting bubbles in the decompression vessel of the bubble-containing liquid that has passed through the pores of the wall surface;
A depressurization adjusting pipe step including a depressurization pipe for depressurizing the depressurization state in the depressurization container in an adjustable manner;
A liquid transfer step of taking out the defoamed liquid;
A defoaming method comprising a bubble scratching step of sliding on the wall surface before the bubble expansion step.

(2) a foam-containing liquid supply mechanism for pressure-feeding the foam-containing liquid;
A bubble expansion mechanism with a bubble expansion wall with pores;
A deaeration / intake / exhaust treatment mechanism for sucking and exhausting bubbles in the decompression vessel;
A depressurization adjusting pipe mechanism capable of adjusting a depressurization state acting on a degassed liquid in a depressurization state of the degassing / exhaust treatment mechanism;
A liquid transfer mechanism for transferring defoamed liquid;
A defoaming apparatus comprising a bubble scratching mechanism for slidingly scratching the surface of the pores on the wall surface of the bubble expanding mechanism.

(3) The bubble expansion mechanism has a cylindrical configuration having pores, and supplies the bubble-containing liquid to be supplied under pressure to either the inside or the outside of the cylindrical configuration and passes through the pores of the bubble expansion wall surface. The defoaming device according to (2) above, wherein the defoaming device can be fed to the deaeration / intake / exhaust processing mechanism.

(4) The bubble enlarging mechanism has a gap between adjacent long wires supported and fixed by a frame as pores, the width of the pores being from micron to millimeter, and bubbles in the liquid passing therethrough The defoaming apparatus according to any one of (2) and (3), wherein the degassing apparatus is configured to increase the number by combining them together.

(5) The bubble enlarging mechanism has pores that allow a bubble-containing liquid to pass between a grooved frame, a wire rod locked to the grooved frame, and an adjacent wire to bond and expand bubbles. The defoaming device according to any one of (2), (3), and (4), wherein the defoaming device is formed as a deaeration expansion element that can be formed.

(6) The defoaming device according to any one of (2) to (5), wherein an interval between adjacent wires constituting the pore is formed in a cross-sectional trumpet shape toward the discharge side.

(7) The bubble expansion mechanism is formed by forming a cylindrical deaeration expansion element by drilling a large number of holes such as round holes or long holes by laser processing on a flat plate having a plate thickness of 0.3 mm to 10 mm. The defoaming device according to (2), wherein bubbles in the liquid passing through either the inner side to the outer side or the outer side to the inner side of the deaeration expansion element can be combined and increased. .

(8) The defoaming device according to any one of (2) to (7), wherein the bubble expanding mechanism includes one of a cylindrical shape and a conical shape having both ends opened.

(9) The deaeration device according to (5), wherein the deaeration expansion element of the bubble expansion mechanism is provided with a scraper piece so that the surface of the pores can be scratched and slid.

(10) The pressure reducing adjustment pipe mechanism is open to the pressure reducing degassing side and the atmosphere opening side, and is configured to be able to adjust the opening degree of the control valve to introduce outside air on the atmosphere opening side. Defoaming device as described.

According to the present invention, bubbles in various liquids cannot be degassed depending on the type of liquid and the size of the viscosity, but by passing through long pores, the bubbles in the liquid overlap and expand. It can pass through, and a trumpet-shaped enlarged part is formed on the discharge side while passing, so that the expansion of bubbles is promoted, the vaporization action is accelerated by the reduced pressure environment, and the bubbles in the liquid rapidly Vaporized and exhausted.

The deaeration expansion element has a cylindrical shape or a conical shape with an opening at the top, and can form foam-containing liquid in different types of inside-outside or outside-in, depending on the type of foam-containing liquid. In addition, the scraper piece can be used to bring the surface of the pores into a scratching contact and push the bubbles into the pores or divide and cut large bubbles to promote the miniaturization of the bubbles and enter the pores. There are effects such as being able to be performed effectively.

At the same time, the depressurization state of the degassing / exhaust treatment mechanism can be adjusted by the depressurization adjusting pipe mechanism, so that the unexcluded gas in the defoamed liquid that has not been discharged can be completely exhausted.

Longitudinal explanatory view showing an example of an outer-inner type which is a basic configuration of a defoaming apparatus according to the present invention II-II sectional view of FIG. Longitudinal explanatory view showing an example of an inner-outer type which is a basic configuration of a defoaming apparatus according to the present invention IV-IV sectional view of FIG. 4 is a perspective view showing four examples of deaeration expansion elements used in the defoaming device of the present invention, where (a) is an outer-inner type, (b) is an inner-outer type, and (c) is an inner-outer or outer side. -When round holes that can be used for both types are used as pores, (d) shows the case where long holes that can be used for both types are used as pores. (A) is a partially enlarged cross-sectional view showing the pore structure of a frame body in which a wire rod fitted to the deaeration expansion element shown in (a) and (b) of FIG. 5 is inserted, and (b) is a diagram. 5 is a partially enlarged cross-sectional view showing the pore structure of the deaeration expansion element shown in 5 (c) and (d) 5 (a) and 5 (b), the shape of the pores through which the foam-containing liquid formed is circulated is varied depending on the cross-sectional shape of the cross-sectional shape of the wire. (A) is a wire with an equilateral triangular cross section, (b) is a wire with an isosceles triangular cross section, (c) is a wire with a cross-section base pentagon, (d ) Shows a case where a circular wire is used, and (e) shows a case where an elliptical cross-section wire is used.

Hereinafter, examples of the present invention will be described.

1 and 2 show an embodiment of a typical outer-inner type defoaming apparatus of the present invention.

1 shows a foam-containing liquid supply mechanism that can supply foam-containing liquid under pressure with a pump or the like, and the foam-containing liquid can be supplied with a desired supply pressure with a pressure pump or the like.

2 indicates a bubble expansion mechanism connected to the subsequent stage of the bubble-containing liquid supply mechanism 1 and includes a cylindrical deaeration expansion element 3.

As shown in FIGS. 5A and 5B, the deaeration expansion element 3 includes a spiral groove 5 on the outer periphery of a cylindrical frame 4, and the groove 5 shown in FIG. ), (B), (c), (d), and (e) have a cross-sectional shape such as a circle, a triangle, a pentagon, and an ellipse. The gap between the adjacent wire rods 6 is defined as the pores 7 to serve as the pores for the foam-containing liquid. Then, as shown in FIG. 6A, the sharp side of the wire 6 can be engaged and fixed in the concave groove 5 to keep the width W of the pore 7 at a predetermined size, and the sharp side. In the case of a circular cross section, an elliptical shape, or the like that does not have any, it can be fixed by engaging one of the sides into the groove 5. Thereby, the thing of the structure where the wall surface of the non-hanging side of the wire rod 6 is flat is (a), (b) and (c) of FIG. (D) and (e).

In this deaeration expansion element 3, the wire 6 mounted on the outer periphery faces the bubble-containing liquid supply mechanism 1, and the bubble-containing liquid is directed from the outer periphery to the inner periphery via the pores 7. And can be used as an outside-inside type by pushing it in the direction of the arrow in FIG.

Reference numeral 8 denotes a deaeration intake / exhaust processing mechanism formed on the inner cylinder side of the deaeration expansion element 3 of the bubble expansion mechanism 2, and a depressurization pump 9 having a depressurization function is disposed on the upper side, and the deaeration expansion A liquid transfer mechanism 10 is connected to the lower side of the element 3 to transfer the liquid that has been deaerated and accumulated in the container.

Reference numeral 11 denotes a bubble scratching mechanism that slides on the outer periphery of the deaeration expansion element 3 of the bubble expansion mechanism 2 and is provided at the subsequent stage of the bubble-containing liquid supply mechanism 1, and specifically includes a scraper piece 12. Then, the outer peripheral surface of the cylindrical deaeration expansion element 3 is rotated so that the bubbles in the liquid facing the peripheral surface of the pores 7 are pushed into the pores 7, or the large bubbles in the liquid are subdivided into the pores 7 It works so that the intrusion into can be done efficiently. In addition, although it is a straight shape in the drawing, it can be formed by bending a desired shape and length such as an arc shape or a spiral shape. In addition, the scraper piece 12 has its sliding contact side slidably contacted with the outer periphery of the deaeration expansion element 3 at an acute or obtuse angle to promote the effect of pushing bubbles in the liquid into the pores 7. It is also possible to effectively remove the solid matter in the liquid by filtration.

13 is a frame for supporting the

scraper piece

12, 14 is a hollow rotating shaft for rotating the

frame

13, 15 is a large gear provided at the end of the

rotating shaft

14, and 16 is the large gear 15 The small gear which meshes | engages can be shown and it can drive by the motor 17. FIG. Reference numeral 18 denotes a bearing disposed on the hollow rotating shaft 14.

A depressurization adjusting pipe mechanism 19 is provided in the deaeration / intake / exhaust processing mechanism 8. Specifically, one end of the tube body is opened to the atmosphere side, and the outside air is sucked in an adjustable manner, and the deaeration / exhaust process is performed. The depressurization state in the mechanism 8 can be freely adjusted in size, and the other end faces the deaeration / intake / exhaust processing mechanism 8. Reference numeral 20 denotes an openable and closable adjustment valve provided in the pressure reducing adjustment pipe mechanism 19 which can adjust the introduction of the atmosphere freely.

The operation will be explained based on the above structure.

A desired bubble-containing liquid produced or manufactured in advance is supplied to the bubble-containing liquid supply mechanism 1 using a pressurizing means such as a pump and supplied toward the bubble expansion mechanism 2 in the next stage.

Since the scraper piece 12 is disposed on the outer periphery of the deaeration expansion element 3 of the bubble expansion mechanism 2 and is rotated by the motor 17, the outer peripheral surface of the deaeration expansion element 3, that is, the pore 7. Therefore, the bubbles in the liquid are forcibly pushed into the pores 7 together with the liquid, and the liquid that hardly passes through the pores 7 due to the rotating action of the scraper pieces 12. Large bubbles in the inside are cut and reduced in size and are similarly pushed into the pores 7.

The bubbles pushed into the pores 7 merge with other neighboring bubbles, expand during the circulation of the pores 7, and are released from the liquid as soon as they enter the deaeration / exhaust treatment mechanism 8. Vaporization is performed and the deaeration process is promptly performed from the inner peripheral surface of the deaeration expansion element 3.

The degassed liquid flows down along the inner peripheral surface of the deaeration expansion element 3 and is stored in a container below the deaeration intake / exhaust treatment mechanism 8 without foaming. The required amount of air is inhaled, and the pressure in the container can be freely changed to maintain the water level of the defoamed liquid in a desired state. And the favorite liquid by which the deaeration process was carried out from the liquid transfer mechanism 10 of the next stage liquid can be obtained.

Incidentally, the pores 7 can have various structures as shown in FIG. With respect to the width W of the pore 7, it can be set to a desired micron unit size depending on the interval between adjacent spiral grooves 5 formed in the frame body 4. The cross-sectional shape of (d) circle, or (a), (b) equilateral triangle or isosceles triangle is very short, but (c) pentagon, (e) ellipse, etc. are compared. It is possible to promote the combined expansion effect of adjacent bubbles.

Further, the scraper piece 12 is flat when the opening surface of the pore 7 on the sliding contact side is (a), (b) and (c) in FIG. In the case of (d) and (e) in the figure, the shape of the arc is uneven, and therefore a conformable brush shape is preferable.

In addition, since the outlet side of the pore 7 shown in FIG. 7 has a trumpet shape α in cross section, the bubbles in the foam-containing liquid tend to vaporize due to the action of decompression expansion during the discharge operation of the pore 7. Inspired, more effective vaporization can be performed.

Specifically, during the production of tofu with relatively high viscosity, the bubbles are effectively reduced by the sliding contact scratching action of the scraper piece 12 on the surface of the pores of the deaeration expansion element 3 with the bubbles and impurities during the production. Inside, the foreign matter is removed, and the back is lined up to homogenize the raw koji, contributing to quality improvement. The bubbles that are pushed into the pores are united with each other and are effectively exhausted by the intake means immediately after passing.

That is, it becomes a kind of defoaming on the back, removes impurities from the raw material, uniformly disperses particulate and fibrous solids and liquids, and defoams while smoothing to obtain a small foam and homogenization of the raw material .

In the figure, reference numeral 21 denotes a back storage part for storing solids removed by the scraper pieces 12 on the surface of the pores 7 before entering the

bubble expanding mechanism

2, 22 is an air vent, and 23 is the frame 4. The hole which comprises is shown.

Next, FIGS. 3 and 4 show another typical embodiment of the defoaming device of the inner-outer type according to the present invention.

In addition, the same code | symbol is attached | subjected about the structure same as FIG.1 and FIG.2, and the detail of description is abbreviate | omitted.

Basically, the bubble-containing liquid supply mechanism 1, the bubble expansion mechanism 2, the deaeration / intake / exhaust treatment mechanism 8, the liquid transfer mechanism 10 and the decompression adjustment pipe mechanism 19 are the same as those in FIGS.

The difference between the two is that the deaeration expansion element 3a of the bubble expansion mechanism 2 shown in FIGS. 3 and 4 is provided with a spiral groove 5 on the inner periphery of the frame body 4, and the wire 6 is engaged in the groove 5. 1 and 2 has a flow mechanism that is formed from the inside to the outside, while the working mechanism of the pore 7 in FIGS. 1 and 2 is from outside to inside. This is the point where it circulates in and out, and everything else is the same constituent action. Moreover, the rotating shaft 14a is not hollow and has a normal shaft structure.

Next, since the scraper piece 12a slides on the inner peripheral surface of the deaeration expansion element 3a, the frame 13a for supporting and rotating the scraper piece 12a is a rotation provided on the central axis of the deaeration expansion element 3a. A pair of upper and lower shafts 14a are provided to fix the upper and lower sides of the scraper piece 12a. The shape and configuration of the scraper piece 12a are the same as in FIGS. 1 and 2, and there is no difference.

Although not shown, the

scrapers

12 and 12a shown in FIGS. 1 and 2 and the

scraper pieces

12 and 12a shown in FIGS. 3 and 4 increase the vertical width or swirl the entire foam-containing liquid as a spiral blade. In addition, it is possible to distribute the foam-containing liquid to the pores 7 effectively and at high speed.

Furthermore, in the drawing, the entire apparatus is shown in a vertical configuration in the vertical direction, but a configuration arrangement in an oblique direction can be similarly implemented.

Moreover, although the

deaeration expansion elements

3 and 3a are cylindrical, it is also possible to make it conical shape with the upper end portion cut off.

In the above embodiment, each of the

deaeration expansion elements

3 and 3a uses the wire 6 having various cross-sectional structures for the frame body 4, and is fitted on the outer periphery or the inner periphery of the cylindrical frame body 4 between the wire members 6. The gap is made to pass through the bubble-containing liquid, and the bubbles in the liquid are separated and expanded so that the bubbles are effectively separated and exhausted in the deaeration / exhaust treatment mechanism 8. Instead, in the embodiment shown in FIGS. 5 (c) and 5 (d), the

deaeration expansion elements

3b and 3c are simply formed with a plurality of small holes or long holes in the cylindrical structure, and these are included as pores 7 of the holes. Air bubbles in the liquid are separated and sucked, and all other configurations are the same as in the above embodiment, and there is no difference.

Specifically, a flat plate with a plate thickness of 0.3 mm to 10 mm of a preferred metal or hard synthetic resin material is drilled with a large number of round holes or long holes 7 such as long holes by laser processing, and is bent into a cylindrical shape. In general, however, the manufacturing process, such as processing with a drawn steel pipe, can be carried out by a desired method. And it can be provided as a straight cylindrical shape or a conical shape with the top and bottom cut off.

This type of defoaming method and defoaming apparatus is used for beverages such as juice, food seasonings such as soy sauce and sauce, liquid products such as chemicals, liquid products such as chemicals, and other cosmetic material liquid products. It can be widely applied to the defoaming treatment of a wide range of liquid products.

DESCRIPTION OF SYMBOLS 1 Foam-containing liquid supply mechanism 2

Bubble expansion mechanism

3, 3a, 3b, 3c Deaeration expansion element 4 Frame body 5 Concave groove 6 Wire material 7 Pore 8 Deaeration intake / exhaust treatment mechanism 9 Pressure reduction pump 10 Liquid transfer mechanism 11 Bubble

scratching process Mechanism

12,

12a Scraper piece

13,

13a Frame

14, 14a Rotating shaft 15 Large gear 16 Small gear 17 Motor 18 Bearing 19 Depressurization adjusting pipe mechanism 20 Control valve 21 Back storage part 22 Air vent 23 Hole W Hole 7 width V Depth α Cross-sectional trumpet shape

Claims

A foam-containing liquid supply step of pressure-transferring the foam-containing liquid toward the wall surface having pores;
A bubble expanding step for collecting and expanding bubbles in the pores of the wall;
A deaeration / intake / exhaust treatment step of sucking and exhausting bubbles in the decompression vessel of the bubble-containing liquid that has passed through the pores of the wall surface;
A depressurization adjusting pipe step including a depressurization pipe for depressurizing the depressurization state in the depressurization container in an adjustable manner;
A liquid transfer step of taking out the defoamed liquid;
A defoaming method comprising a bubble scratching step of sliding on the wall surface before the bubble expansion step.
A foam-containing liquid supply mechanism for pressure-feeding the foam-containing liquid;
A bubble expansion mechanism with a bubble expansion wall with pores;
A deaeration / intake / exhaust treatment mechanism for sucking and exhausting bubbles in the decompression vessel;
A depressurization adjusting pipe mechanism capable of adjusting a depressurization state acting on a degassed liquid in a depressurization state of the degassing / exhaust treatment mechanism;
A liquid transfer mechanism for transferring defoamed liquid;
A defoaming apparatus comprising a bubble scratching mechanism for slidingly scratching the surface of the pores on the wall surface of the bubble expanding mechanism.
The bubble expanding mechanism has a cylindrical structure having pores, and supplies the bubble-containing liquid to be supplied under pressure to either the inside or the outside of the cylindrical structure, and passes through the pores on the bubble expanding wall surface to remove it. 3. A defoaming device according to claim 2, wherein the defoaming device is configured to be fed to an air intake / exhaust processing mechanism.
The bubble expansion mechanism has a gap between adjacent long wires supported and fixed by a frame as pores, the width of the pores is from micron to millimeter, and the bubbles in the passing liquid are aggregated together. The defoaming device according to claim 2, wherein the defoaming device is configured to be able to be increased.
The bubble expansion mechanism is a detachment mechanism that can form pores that allow a bubble-containing liquid to pass between a grooved frame, a wire locked to the grooved frame, and an adjacent wire to bond and expand bubbles. The defoaming device according to any one of claims 2, 3 and 4, wherein the defoaming device is formed as a gas expansion element.
The defoaming device according to any one of claims 2 to 5, wherein an interval between adjacent wires constituting the pores is formed in a cross-sectional trumpet shape toward the discharge side.
The bubble expansion mechanism is a cylindrical deaeration expansion element that is formed in a cylindrical deaeration expansion element by drilling a large number of holes such as round holes or long holes by laser processing on a flat plate with a plate thickness of 0.3 mm to 10 mm. 3. The defoaming apparatus according to claim 2, wherein bubbles in the liquid passing from the inside to the outside of the element or from the outside to the inside of the element can be combined and increased.
The defoaming device according to any one of claims 2 to 7, wherein the bubble expanding mechanism has one configuration of a cylindrical shape or a conical shape having both ends opened.
6. The deaeration device according to claim 5, wherein the deaeration expansion element of the bubble expansion mechanism is provided with a scraper piece so that the surface of the pores can be scratched and slid.
3. The defoaming apparatus according to claim 2, wherein the depressurization adjusting pipe mechanism opens to the depressurization defoaming side and the atmosphere opening side so that the opening degree of the control valve can be adjusted by introducing outside air on the atmosphere opening side. apparatus.