WO2014115450A1

WO2014115450A1 - Liquid-liquid separation device

Info

Publication number: WO2014115450A1
Application number: PCT/JP2013/084087
Authority: WO
Inventors: 宜之吉尾; 康弘小路; 隆志大橋
Original assignee: 株式会社クレハ
Priority date: 2013-01-23
Filing date: 2013-12-19
Publication date: 2014-07-31

Abstract

A liquid-liquid separation device (100) which separates a mixed liquid, in which two liquids having different specific gravities from one another are mixed, into the respective liquids. The device comprises a body section (1), a baffle plate (3), a liquid introduction nozzle (2) which has an opening section (2a), an upper section discharge passage (4), and a lower section discharge passage (5). The liquid introduction nozzle (2) introduces the mixed liquid along an inner wall surface of the body section (1), and horizontally from the opening section (2a).

Description

Liquid-liquid separator

The present invention relates to a liquid-liquid separator that separates liquids using light weight of specific gravity.

A separation method using light weight of specific gravity is generally used to separate two liquids that have different specific gravity, such as water and oil, and are not mixed with each other. However, when the droplets formed by the liquid to be removed are fine, the settling speed of the droplets is slow, and the separated droplets are mixed again, which takes time. It is difficult to separate. For this reason, there is a problem that the volume of the apparatus has to be increased in order to ensure the residence time of the liquid.

In order to solve such problems, various separation devices have been developed. For example, Patent Document 1 discloses a separation apparatus that enables efficient separation by bringing a small amount of liquid to be removed in the separation apparatus into contact with each other to enlarge the droplets. Patent Document 2 discloses a separation device provided with a separation member that prevents separated liquids from being mixed again by combining separated liquids having a large specific gravity.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2001-252503 (published on September 18, 2001)” Japanese Patent Publication “Japanese Unexamined Patent Publication No. 2009-178654 (Released on August 13, 2009)”

However, in the case of the separation devices disclosed in Patent Document 1 and Patent Document 2, it is necessary to complicate the flow path in order to enlarge the droplet to some extent or to separate the liquid having a large specific gravity. In addition, in an apparatus that performs separation by circulating a liquid in a horizontal direction as disclosed in Patent Document 1 and Patent Document 2, it is difficult to reduce the floor area of the separation apparatus. Furthermore, it is difficult to use the configurations disclosed in Patent Document 1 and Patent Document 2 in an apparatus that performs separation by circulating a liquid in the vertical direction.

The present invention has been made in view of the above-described problems, and its object is to efficiently separate even liquid that exists as fine droplets while reducing floor area and apparatus capacity. Is to provide a simple liquid-liquid separator.

In order to solve the above-described problems, a liquid-liquid separation device according to the present invention is a liquid-liquid separation device that separates a mixed liquid obtained by mixing a first liquid and a second liquid having different specific gravities into liquids. A body part for retaining the mixed liquid therein, a rectifying plate that contacts one part of the inner wall surface of the side surface of the body part with one surface facing downward, and an opening part that discharges the mixed liquid into the body part A liquid introduction means having an upper discharge means that is provided in the body portion above the current plate and discharges one of the first liquid and the second liquid that are separated from each other and having a smaller specific gravity to the outside. And a lower discharge means for discharging the one of the first liquid and the second liquid, which are separated from each other, having a higher specific gravity to the outside, below the opening. The rectifying plate is above the opening. Located in, the opening is provided to the mixed liquid to discharge in a horizontal direction along the inner wall surface of the barrel.

According to the present invention, it is possible to provide a liquid-liquid separation apparatus that can efficiently separate even a liquid contained in a trace amount while reducing the floor area and the capacity of the apparatus.

It is sectional drawing which shows schematic structure of the liquid-liquid separator which concerns on one Embodiment of this invention. It is a perspective view of the front-end | tip part of the liquid introduction nozzle in the liquid-liquid separator which concerns on one Embodiment of this invention. It is arrow sectional drawing of the liquid-liquid separator which concerns on one Embodiment of this invention. It is a figure which shows the support method of the baffle plate in the liquid-liquid separator which concerns on one Embodiment of this invention. It is a figure explaining the direction of the liquid introduction nozzle in the liquid-liquid separator which concerns on other embodiment of this invention. It is a perspective view of the front-end | tip part of the liquid introduction nozzle in the liquid-liquid separator which concerns on other embodiment of this invention.

An embodiment of the liquid-liquid separation device according to the present invention will be described below with reference to FIGS.

The liquid-liquid separation device 100 according to the present embodiment separates each liquid from a mixed liquid in which liquids having different specific gravities (first liquid and second liquid) are mixed using the light weight of each liquid. Is. Examples of the mixed liquid that can be separated by the liquid-liquid separator 100 include a mixed liquid of oil and water. In this mixed liquid, oil has a relatively low specific gravity and water has a relatively high specific gravity. Each liquid (the first liquid and the second liquid) need not contain only one kind of chemical substance, and may be a mixture of chemical substances that can be mixed with each other.

Also, the liquid-liquid separation device 100 can be used continuously with another separation device such as a gas-liquid separation device in a chemical plant or the like, for example.

FIG. 1 is a vertical sectional view showing a schematic configuration of the liquid-liquid separator 100. As shown in FIG. 1, the liquid-liquid separation device 100 includes a barrel portion 1, a liquid introduction nozzle (liquid introduction means) 2 for introducing the mixed solution into the barrel portion 1, a rectifying plate 3, and a small specific gravity. An upper discharge passage (upper discharge means) 4 for discharging the liquid (hereinafter simply referred to as “liquid having a low specific gravity”) and a liquid having a higher specific gravity (hereinafter simply referred to as “liquid having a high specific gravity”). ), And a lower discharge passage (lower discharge means) 5.

The body part 1 is a tank in which the mixed liquid to be treated is retained, and the upper part is cylindrical and the lower part is conical. The cross-sectional shape in the horizontal direction of the inner wall surface of the body 1 is circular at any position. The height and diameter of the body portion 1 are not particularly limited, and may be appropriately determined depending on the type and amount of the liquid to be processed. The upper end of the body 1 is covered with a lid 6.

An upper discharge passage 4 is provided in the upper portion of the trunk portion 1. The upper discharge passage 4 is a passage for discharging a liquid having a low specific gravity among a liquid having a high specific gravity and a liquid having a low specific gravity that are separated from each other. In the upper discharge passage 4, the inside and outside of the body portion 1 communicate with each other, so that the liquid is always discharged. The shape and diameter of the upper discharge passage 4 are not particularly limited.

A lower discharge passage 5 is provided at the lower portion of the trunk portion 1. The lower discharge passage 5 is a passage for discharging a liquid having a high specific gravity among a liquid having a high specific gravity and a liquid having a low specific gravity that are separated from each other. The lower discharge passage 5 is provided with means (for example, a valve, a cock, etc.) capable of blocking communication between the inside and the outside of the body portion 1 and has a large specific gravity from the lower discharge passage 5 at a desired timing. The liquid is discharged. For example, when a certain amount of liquid having a large specific gravity accumulates, it can be discharged to the outside. Alternatively, a liquid having a large specific gravity can be continuously discharged during operation of the liquid-liquid separator 100.

The liquid introduction nozzle 2 is a passage for introducing the mixed liquid to be processed into the body 1. FIG. 2 is a perspective view of the tip portion of the liquid introduction nozzle 2. As shown in FIG. 2, the liquid introduction nozzle 2 is L-shaped, and is formed by combining a cylindrical penetrating portion 2b and a square columnar horizontal introducing portion 2c. As shown in FIG. 1, in the liquid introduction nozzle 2, the penetration portion 2 b extends from the outside of the barrel portion 1 through the lid 6 in the vertical direction to the lower portion of the barrel portion 1. The horizontal introduction portion 2c is provided with an opening 2a, and the opening 2a faces the horizontal direction. The opening 2 a is located higher than the lower discharge passage 5. The opening 2a is shown on the near side in FIG. 1 and on the left side in FIG. The mixed liquid flows in an L shape from the outside of the body 1 through the liquid introduction nozzle 2 and is discharged into the body 1 from the opening 2a.

FIG. 3 is a cross-sectional view taken along the line A-A ′ in FIG. 1 showing the state in which the liquid-liquid separator 100 is cut. As shown in FIG. 3, the opening 2 a is provided close to the inner wall surface of the body 1. Further, the opening 2a is a horizontal tangent L2 at a point where a straight line L1 connecting the central axis of the barrel 1 and the central axis of the liquid introduction nozzle 2 (the central axis of the penetration portion 2b) intersects the inner wall surface of the barrel 1. It is provided to face in the same direction. Therefore, the mixed liquid discharged from the opening 2 a is effectively introduced in the horizontal direction along the inner wall surface of the body 1. Moreover, since the liquid introduction nozzle 2 is L-shaped, the mixed liquid that has flowed in the vertical direction from the upper part to the lower part in the columnar part is changed into a flow in the horizontal direction in the horizontal introduction part 2c. That is, a horizontal flow is formed in advance in the liquid introduction nozzle 2. Therefore, the mixed liquid discharged from the opening 2 a is more effectively introduced in the horizontal direction along the inner wall surface of the body 1. The length of the horizontal introduction part 2c is not particularly limited, but a longer one may be preferable.

Further, the projected portion of the inner wall surface of the body portion 1 in the direction of discharge of the mixed liquid in the opening portion 2 a is a tangent line parallel to the opening portion 2 a among the tangent lines of the inner wall surface in the horizontal section of the inner wall surface of the body portion 1. An opening 2a is provided so as not to include a contact point between the body portion 1 and the inner wall surface of the body portion 1. For this reason, the mixed liquid discharged from the opening 2a is likely to face in one direction (clockwise or counterclockwise) after hitting the inner wall surface of the body 1. Therefore, it is more efficiently converted into a swirling flow in one direction (clockwise or counterclockwise).

As shown in FIG. 3, the rectifying plate 3 has a semicircular shape, and the entire arc-shaped portion is in contact with the inner wall surface of the side surface of the trunk portion 1. The rectifying plate 3 is in contact with one surface facing downward, and is provided horizontally. The rectifying plate 3 is at a position higher than the opening 2 a and at a position lower than the upper discharge passage 4. The height of the rectifying plate 3 with respect to the height of the opening 2a and the upper discharge passage 4 is not particularly limited, but the rectifying plate 3 is slightly higher than the opening 2a or slightly lower than the upper discharge passage 4. The case where the current plate 3 is at a height near the middle between the opening 2a and the upper discharge passage 4 is more preferable than the case. When the rectifying plate 3 is at a height near the middle between the opening 2a and the upper discharge passage 4, a part of the liquid having a large specific gravity is discharged from the upper discharge passage 4 without swirling below the rectifying plate 3. This is because the flow rate on the upper side of the flow straightening plate 3 is increased and the possibility that the liquid having a large specific gravity is sucked into the upper discharge passage 4 is reduced. Further, the current plate 3 is provided on the same side as the upper discharge passage 4 when viewed from above.

FIG. 4 is a view showing a method of supporting the current plate 3. As shown in FIG. 3 and FIG. 4A, the rectifying plate 3 is supported horizontally by five supports 7 provided on the lid 6, and is welded to the body 1. It has not been. Specifically, as shown in FIG. 4B, the support body 7 includes

support parts

7a and 7b and

bolts

7c and 7d. The upper part (shaded part) of the support part 7a is welded to the lid 6, and the support part 7a and the support part 7b are fixed by bolts 7c. Further, the support component 7b and the rectifying plate 3 are fixed by bolts 7d. In FIG. 4B, a description of a through-hole 3a described later is omitted.

As shown in FIG. 3, the current plate 3 is provided with a plurality of through holes 3 a. The through hole 3a is a hole for dropping a liquid having a large specific gravity accumulated on the current plate 3 downward. The hole diameter and the number of the through holes 3a are not particularly limited, but the hole diameter of the through holes 3a is preferably, for example, 1 mm to 20 mm from the viewpoint of the effect of the current plate 3 and the prevention of clogging.

The separation process of the mixed liquid by the liquid-liquid separation apparatus 100 according to this embodiment will be described below.

First, the mixed liquid flows through the liquid introduction nozzle 2 and is continuously introduced into the body 1 from the opening 2a. At this time, as described above, the opening 2a is such that a straight line L1 that connects the central axis of the barrel 1 and the central axis of the liquid introduction nozzle 2 (the central axis of the penetration portion 2b) intersects the inner wall surface of the barrel 1. It is provided so as to face in the direction equal to the horizontal tangent line L2. Therefore, the mixed liquid flows along the horizontal direction on the inner wall surface of the body 1. That is, with reference to FIG. 3, the opening 2 a is located below the liquid introduction nozzle 2 when the liquid-liquid separation device 100 is viewed from above. Therefore, a clockwise flow along the inner wall surface occurs. On the other hand, since the mixed liquid is continuously introduced from the opening 2a, the mixed liquid flows toward the upper discharge passage 4 where the liquid is always discharged. Here, since the rectifying plate 3 is provided at a position higher than the opening 2 a and lower than the upper discharge passage 4, the mixed liquid is prevented from locally rising toward the upper discharge passage 4. Accordingly, in the trunk portion 1, a flow gradually moving upward is formed while the mixed liquid swirls along the inner wall surface of the trunk portion 1. The flow rate at which the mixed liquid is introduced is not particularly limited, and the flow rate may be appropriately set according to the target degree of separation, but is preferably slower from the viewpoint of increasing the residence time.

In the process in which the mixed liquid flows while swirling from the opening 2a to the upper discharge passage 4, the liquid having a large specific gravity cannot follow the upward flow of the mixed liquid due to its own weight. Therefore, the liquid having a large specific gravity gradually settles while turning and accumulates in the lower portion of the trunk portion 1. The liquid having a large specific gravity that has flowed to the upper side of the rectifying plate 3 accumulates on the rectifying plate 3, but since the rectifying plate 3 is provided with a through hole 3a, the accumulated liquid having a large specific gravity passes through the through hole 3a. Falls down.

Therefore, the ratio of the liquid having a large specific gravity decreases toward the upper part of the body portion 1, and when the mixed liquid reaches the upper discharge passage 4, the liquid having a large specific gravity is hardly included. The mixed liquid that has reached the upper discharge passage 4 is pushed out and discharged by the mixed liquid continuously introduced from the opening 2a.

On the other hand, as the amount of liquid having a large specific gravity accumulated in the lower portion of the body portion 1 increases with the passage of time, when the liquid having a larger specific gravity than a predetermined amount has accumulated, the lower portion of the body portion 1 passes through the lower discharge passage 5. If discharged to the outside, only the liquid having a large specific gravity can be discharged from the lower discharge passage 5. Alternatively, a liquid having a large specific gravity may be always discharged from the lower discharge passage 5. If the accumulated liquid with a large specific gravity is appropriately discharged from the lower discharge passage 5, the excessively accumulated liquid with a large specific gravity can be prevented from being mixed again with the liquid with a small specific gravity. It is desirable to discharge the liquid having a large specific gravity so that the boundary surface between the liquid having a large specific gravity and the liquid having a small specific gravity is always lower than the lower end of the opening 2a. This is because the risk of the mixed liquid introduced from the opening 2a being drawn up and mixed again is reduced.

Since the opening 2a is above the lower end of the body 1, the liquid having a large specific gravity accumulated between the lower end of the body 1 and the lowermost part of the opening 2a can be entrained in the upward flow. It is suppressed. The height from the lower end of the body 1 to the lowermost part of the opening 2a is not particularly limited, but is preferably smaller from the viewpoint of miniaturization of the liquid-liquid separator 100, and from the viewpoint of the discharge frequency of liquid having a large specific gravity. Is preferably larger.

Further, since the rectifying plate 3 is provided, the liquid having a large specific gravity accumulated in the lower portion of the body portion 1 is discharged into the upper portion even when the liquid having a large specific gravity accumulated in the upward flow. Direct arrival at the passage 4 is suppressed. Therefore, the liquid having a large specific gravity is suppressed from being discharged from the upper discharge passage 4. Furthermore, since the rectifying plate 3 is provided horizontally, disturbance in the vertical direction is more efficiently suppressed.

As described above, in the liquid-liquid separator 100, the mixed liquid swirls and the occurrence of a local upward flow toward the upper discharge passage 4 is suppressed, so that the distance until the liquid is discharged from the upper portion is increased. For this reason, the time for staying in the body part 1 becomes longer. As a result, the separation between the liquid having a small specific gravity and the liquid having a large specific gravity is further promoted, so that the liquid having a large specific gravity can be prevented from being discharged from the upper discharge passage 4. For example, even if the liquid having a large specific gravity is a mixed liquid existing as fine droplets, the residence time becomes long, so that the liquid having a large specific gravity can be efficiently separated and removed. Therefore, it can isolate | separate efficiently with a small capacity | capacitance compared with the apparatus which does not turn. Moreover, compared with the apparatus which distribute | circulates a liquid to a horizontal direction and is isolate | separated as described in patent document 1 and patent document 2, a floor area can be made small.

The liquid discharged from the upper discharge passage 4 is not only in a state containing only a liquid having a small specific gravity, but also a liquid having a large specific gravity compared to the mixed liquid introduced from the opening 2a of the liquid introduction nozzle 2. The ratio may be in a reduced state.

It is preferable that the gas contained in the mixed liquid is removed before being processed by the liquid-liquid separator 100. This is because the upward flow of the mixed liquid accompanying the rise of the gas in the body portion 1 can be suppressed. Therefore, the liquid-liquid separator 100 can be used continuously with the gas-liquid separator, for example, in a chemical plant.

The liquid-liquid separation device 100 has a structure applicable to existing tanks. That is, the existing tank can be used as the trunk 1 as it is. The liquid introduction nozzle 2 is provided by forming an opening in the lid 6 and inserting it from above. The rectifying plate 3 is provided by providing a support 7 on the lid 6 and supporting the support 7 on the lid 6. Therefore, the liquid-liquid separator 100 can be highly versatile and inexpensive. Further, the liquid-liquid separator 100 does not require a large-scale member and can be easily manufactured.

In the liquid-liquid separator according to the present invention, the shape of the body 1 is not limited to that shown in FIG. 1, but the cross-sectional shape in the horizontal direction of the inner wall surface is preferably circular or elliptical. When the cross-sectional shape in the horizontal direction of the inner wall surface is a circle or an ellipse, the side surface of the inner wall surface of the trunk portion 1 is a curved surface curved inward. Therefore, the mixed liquid introduced from the opening 2a of the liquid introduction nozzle 2 turns in a state in which the disturbance in the vertical direction is further suppressed. Therefore, it is further suppressed that the liquid having a small specific gravity and the liquid having a large specific gravity once separated are mixed again. Therefore, it can isolate | separate more efficiently.

In the liquid-liquid separation device according to the present invention, the position of the opening 2 a is not limited to that shown in FIG. 1, but the opening 2 a is preferably other than on the central axis of the body 1. More preferably, the opening 2 a is located within a range in which the distance from the inner wall surface of the trunk portion 1 is shorter than half of the distance from the central axis of the trunk portion 1 to the inner wall surface of the trunk portion 1. For example, when the horizontal cross-sectional shape of the inner wall surface of the trunk portion 1 is circular, when the radius of the inner wall surface of the trunk portion 1 that is the distance from the center of the trunk portion 1 to the inner wall surface of the trunk portion 1 is R, The opening 2a is preferably within a range of R / 2 distance from the inner wall surface of the trunk portion 1, and more preferably as the distance from the inner wall surface of the trunk portion 1 is shorter. When the opening 2a is within the range of R / 2 distance from the inner wall surface of the body 1, the distance until the mixed liquid discharged from the opening 2a reaches the inner wall of the body 1 is short. Therefore, the mixed liquid collides with the inner wall surface of the trunk portion 1 while maintaining the flow direction without being disturbed from the opening 2a. Therefore, the mixed liquid discharged from the opening 2 a is effectively introduced along the inner wall surface of the body 1.

In the liquid-liquid separator according to the present invention, the direction of the opening 2a is not limited to that shown in FIG. 3, but the center of the opening 2a passes through the central axis of the penetration 2b as shown in FIG. The direction with respect to the straight line L3 parallel to the tangent line L2 is preferably within ± 45 degrees. The distance from the opening 2a to the inner wall surface of the trunk portion 1 is shortened, and the mixed liquid that has hit the inner wall surface of the trunk portion 1 tends to face in one direction (clockwise or counterclockwise). Therefore, a swirl flow in one direction (clockwise or counterclockwise) is formed more efficiently. Further, the opening 2a is particularly preferably in the same direction as the tangent L2 (the direction of the opening 2a in FIG. 3 and the direction opposite to that by 180 degrees). This is because a swirl flow in one direction (clockwise or counterclockwise) is more efficiently formed. When the opening 2a is in the opposite direction to that shown in FIG. 3, a counterclockwise flow along the inner wall surface occurs.

In the liquid-liquid separation device according to the present invention, the positional relationship of the liquid introduction nozzle 2, the rectifying plate 3, and the upper discharge passage 4 when viewed from above is not limited to that shown in FIG. For example, the upper discharge passage 4 does not have to be provided on the inner wall surface above the portion of the inner wall surface of the body portion 1 where the rectifying plate 3 is in contact. For example, in FIG. 3, the rectifying plate 3 may be provided at a position covering the right half of the body portion 1. However, as shown in FIG. 3, the upper discharge passage 4 is preferably provided on the inner wall surface above the portion of the inner wall surface of the body portion 1 where the rectifying plate 3 is in contact. With such an arrangement, even when a liquid having a high specific gravity existing below the height of the current plate 3 is rolled up, the amount that reaches the upper discharge passage 4 directly is reduced. When the liquid-liquid separation device according to the present invention is used in, for example, a chemical plant that performs processing continuously, the relative positions of the liquid introduction nozzle 2 and the upper discharge passage 4 are the steps before the step using the liquid-liquid separation device. By the liquid / liquid separation device provided in the device used in the subsequent step of the step using the liquid / liquid separation device, and the discharge port for discharging the mixed liquid processed by the liquid / liquid separation device. It can be determined appropriately depending on the position of the inlet through which the processed liquid with a small specific gravity is introduced.

In the liquid-liquid separator according to the present invention, the overall shape of the liquid introduction nozzle 2 and the shape of the opening 2a are not limited to the shapes shown in FIG. For example, as shown in FIG. 6, the liquid introduction nozzle 2 may be one in which an opening 2 a is formed by cutting a part of the side surface at the tip of the penetration portion 2 b. When the liquid introduction nozzle 2 has such a shape, for example, an opening having the same diameter as the liquid introduction nozzle 2 is formed in the lid 6 and inserted from above. Therefore, it is easy to install and can be easily applied to general-purpose tanks.

In the liquid-liquid separation device according to the present invention, the liquid introduction nozzle 2 is not limited to the case where the liquid introduction nozzle 2 is provided in the body portion 1 from the lid 6, and may be provided on the side surface or the bottom surface of the body portion 1. From the viewpoint of easy installation of the liquid introduction nozzle 2, it is preferable that the liquid introduction nozzle 2 is provided in the body 1 from the lid 6 as shown in FIG. 1. From the viewpoint of not disturbing the swirling flow in the body portion 1, it is preferably provided on the side surface or the bottom surface of the body portion 1.

In the liquid-liquid separator according to the present invention, the method of supporting the rectifying plate 3 is not limited to the method shown in FIG. For example, the current plate 3 may be welded to the side surface of the body portion 1. Alternatively, support legs may be provided on the lower surface of the current plate 3. Further, the rectifying plate 3 does not need to have the through hole 3a. For example, a liquid with a large specific gravity accumulated on the rectifying plate 3 may be dropped downward by installing it at a slight inclination. The inclination angle is not particularly limited as long as the effect of suppressing the upward flow disorder of the mixed liquid is obtained, but is preferably within 20 degrees. Moreover, you may use the baffle plate 3 which the upper surface inclined. In addition, the said inclination is formed so that the part which is not contacting the inner wall face of the trunk | drum 1 among the outer periphery of the upper surface of the baffle plate 3 may become a low position.

In the liquid-liquid separation device according to the present invention, the cross-sectional area of the rectifying plate 3 is not particularly limited, but in the horizontal cross section of the inner wall surface of the body portion 1 at the contact position of the rectifying plate 3 (that is, In the projection in the vertical direction at the height of the contact position), it is preferable to cover 10% or more of the body part 1, and more preferably to cover 50% or more. Further, it is preferable that the area of the uncovered body portion 1 is larger than the cross-sectional area of the liquid introduction nozzle 2 in the horizontal cross section of the inner wall surface of the body portion 1 at the contact position of the rectifying plate 3. When the rectifying plate 3 has the cross-sectional area as described above, generation of a local upward flow that flows toward the upper discharge passage 4 is effectively suppressed, and vertical disturbance is effectively suppressed. In addition, in the horizontal cross section of the inner wall surface of the barrel portion 1 at the contact position of the rectifying plate 3, the rectifying plate 3 covers 10% or more of the barrel portion 1 so that a sufficient separation effect can be obtained. .

Further, in the liquid-liquid separator according to the present invention, it is preferable that the rectifying plate 3 is in contact with one of the inner wall surfaces of the body portion 1. Moreover, when the horizontal cross-sectional shape of the inner wall surface of the trunk | drum 1 is circular, it is preferable that the arc-shaped part of the baffle plate 3 is contact | abutting to the inner wall surface of the trunk | drum 1, and the shape of the baffle plate 3 is an arc shape. It is a shape having a portion, more preferably an arcuate shape or a sector shape. When the current plate 3 has an arcuate shape, the arcuate portion of the arcuate shape comes into contact with the inner wall surface of the trunk portion 1, and other portions do not come into contact with the inner wall surface of the trunk portion 1. Further, when the current plate 3 is fan-shaped, the fan-shaped arc-shaped portion is in contact with the inner wall surface of the body portion 1 and the other portions are not in contact with the inner wall surface of the body portion 1 or only at one point at the apex. Touch. That is, when the shape of the current plate 3 is an arcuate shape, the current plate 3 is brought into contact with one of the inner wall surfaces of the body portion 1. When the current plate 3 has the shape as described above, the flow toward the upper discharge passage 4 is effectively suppressed, and the vertical disturbance is effectively suppressed.

In the liquid-liquid separation device according to the present invention, a gas discharge port is provided on the side surface of the barrel portion 1 or the lid 6 above the upper discharge passage 4, and the gas accumulated in the barrel portion 1 (mixed in the mixed liquid). Gas) may be appropriately discharged.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope indicated in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

As described above, the liquid-liquid separation device according to the present invention is a liquid-liquid separation device that separates a mixed liquid, in which a first liquid and a second liquid having different specific gravities are mixed, into each liquid, A liquid having a barrel portion that retains the mixed liquid, a rectifying plate that contacts one part of the inner wall surface of the side surface of the barrel portion with one surface facing down, and an opening that discharges the mixed liquid in the barrel portion Introducing means, upper discharge means provided on the body part above the current plate and discharging the separated first liquid and second liquid having a smaller specific gravity to the outside, and the opening Lower discharge means provided on the body portion below the portion and discharging the separated first liquid and second liquid having a higher specific gravity to the outside, and the current plate Located above the opening, the opening is The liquid mixture is provided so as to emit in a horizontal direction along the inner wall surface of the barrel.

According to the above configuration, the mixed liquid is introduced into the body portion from the opening provided in the liquid introducing means in the horizontal direction. Since the mixed liquid is introduced in the horizontal direction along the inner wall surface of the body portion, the mixed liquid swirls along the inner wall surface. In addition, there is a rectifying plate that is on the upper side of the opening and faces one side of the inner wall surface of the body portion with the surface facing downward, so that a local fast upward flow toward the upper discharge means is generated. Is suppressed. For this reason, the time during which the mixed liquid stays in the body portion becomes longer, and the separation of the first liquid and the second liquid is further promoted. Of the first liquid and the second liquid separated from each other, the one having a smaller specific gravity moves upward, and is thus discharged through the upper discharge means provided in the body portion above the current plate. On the other hand, the first liquid and the second liquid separated from each other have a higher specific gravity and move downward, so that they are discharged through the lower discharge means provided in the body below the opening. .

In this way, since the residence time of the mixed liquid can be increased by suppressing the up-and-down turbulence using the swirling flow, the liquid existing as fine droplets while reducing the floor area and the capacity of the apparatus Even so, it can be separated efficiently.

In the liquid-liquid separator according to the present invention, the opening is preferably oriented in the horizontal direction.

According to the above configuration, the mixed liquid is effectively discharged in the horizontal direction from the opening. Therefore, the mixed liquid effectively swirls along the inner wall surface.

In the liquid-liquid separation device according to the present invention, it is preferable that the body portion has a circular or elliptical cross section in the horizontal direction of the inner wall surface.

According to the above configuration, the side surface of the inner wall surface of the trunk portion is a curved surface curved inward. For this reason, the mixed liquid introduced from the opening turns in a state where the disturbance in the vertical direction is further suppressed. Therefore, it is further suppressed that the liquid having a small specific gravity and the liquid having a large specific gravity once separated are mixed again. Therefore, the mixed liquid can be separated into each liquid more efficiently.

In the liquid-liquid separation device according to the present invention, the opening is within a range in which the distance from the inner wall surface of the trunk is shorter than half of the distance from the central axis of the trunk to the inner wall of the trunk. Preferably there is.

According to the above configuration, the opening is located near the inner wall surface of the trunk. Therefore, the distance until the mixed liquid discharged from the opening reaches the inner wall surface of the trunk is short. Therefore, the mixed liquid hits the inner wall surface of the body portion without being disturbed while maintaining the flow direction. Therefore, the mixed liquid discharged from the opening is effectively introduced along the inner wall surface of the trunk.

In the liquid-liquid separation device according to the present invention, the projected portion of the opening in the inner wall surface in the discharge direction of the mixed liquid is the opening of the tangent to the inner wall in the horizontal section of the inner wall. It is preferable not to include a contact point between the tangent line parallel to the inner wall surface and the inner wall surface.

According to the above configuration, the mixed liquid discharged from the opening is likely to face in one direction (clockwise or counterclockwise) after colliding with the inner wall surface of the trunk. Therefore, it is more efficiently converted into a swirling flow in one direction (clockwise or counterclockwise).

In the liquid-liquid separation device according to the present invention, the opening is equal to a horizontal tangent at a point where a straight line connecting the central axis of the trunk and the central axis of the liquid introducing means intersects the inner wall surface of the trunk. It is preferable to face the direction.

According to the above configuration, the opening discharges the mixed liquid in a direction equal to a horizontal tangent at a point where a straight line connecting the central axis of the body portion and the central axis of the liquid introducing means intersects the inner wall surface of the body portion. can do. Therefore, the distance from the opening to the inner wall surface of the trunk portion is shortened, and the mixed liquid hitting the inner wall surface of the trunk portion tends to face in one direction (clockwise or counterclockwise). Therefore, it is more efficiently converted into a swirling flow in one direction (clockwise or counterclockwise).

In the liquid-liquid separation device according to the present invention, it is preferable that the liquid introduction means has a horizontal introduction portion extending in the horizontal direction, and has the opening at the tip of the horizontal introduction portion.

According to the above configuration, the mixed liquid is preliminarily formed with a horizontal flow before being introduced into the body from the opening. Therefore, the mixed liquid discharged from the opening is more effectively introduced along the horizontal direction on the inner wall surface of the trunk.

In the liquid-liquid separator according to the present invention, the rectifying plate has an arc-shaped portion, the arc-shaped portion is in contact with the inner wall surface of the trunk portion, and the vertical direction at the height of the contact position of the rectifying plate. It is preferable to cover 10% or more of the body part.

According to the above configuration, it is possible to more effectively suppress the occurrence of a local upward flow that flows toward the upper discharge means. Moreover, a sufficient separation effect can be obtained by covering 10% or more of the body portion.

In the liquid-liquid separator according to the present invention, the rectifying plate is more preferably an arc shape or a fan shape.

According to the above configuration, when the current plate is bow-shaped, the arc-shaped portion of the bow is in contact with the inner wall surface of the trunk portion, and the other portions are not in contact with the inner wall surface of the trunk portion. When the current plate has a fan shape, the fan-shaped arc-shaped portion abuts on the inner wall surface of the trunk portion, and the other portions do not abut on the inner wall surface of the trunk portion or abut only at one point on the apex. That is, the current plate is brought into contact with one of the inner wall surfaces of the trunk portion. Therefore, the flow toward the upper discharge means is effectively suppressed, and the vertical disturbance is effectively suppressed.

In the liquid-liquid separator according to the present invention, it is more preferable that the arc-shaped portion is in contact with an inner wall surface below a position where the upper discharge means is provided.

According to the above configuration, the rectifying plate is provided below the position where the upper discharge means is provided. For this reason, even when a liquid having a large specific gravity existing below the height of the current plate is rolled up, the amount that reaches the upper discharge means directly decreases. In addition, the flow toward the upper discharge means is suppressed, and vertical disturbance is suppressed. Therefore, it is possible to effectively prevent the liquid having a large specific gravity from being discharged from the upper discharge means.

In the liquid-liquid separator according to the present invention, the rectifying plate is preferably provided horizontally.

According to the above configuration, the rectifying plate effectively suppresses the vertical flow in the mixed liquid. Therefore, it is possible to introduce the mixed liquid in a state where the disturbance in the vertical direction is suppressed. Therefore, the mixed liquid can be separated into each liquid more efficiently.

In the liquid-liquid separation device according to the present invention, it is preferable that the rectifying plate has a plurality of through holes.

According to the above configuration, when a liquid having a large specific gravity that has flowed to the upper side of the current plate accumulates on the current plate, it can be dropped from the current plate through the through hole. Therefore, it is possible to prevent the liquid having a large specific gravity accumulated on the current plate from being discharged from the upper discharge means.

The apparatus according to the present invention can be used for separation of a mixed liquid in a chemical plant or the like.

1 body 2 liquid introduction nozzle (liquid introduction means)

2a Opening part

2b Penetration part 2c Horizontal introduction part 3 Current plate 3a Through-hole 4 Upper discharge passage (upper discharge means)
5 Lower discharge passage (lower discharge means)
6 Lid 7 Support

7a Support part

7b Support part 7c Bolt 7d Bolt 100 Liquid-liquid separator

Claims

A liquid-liquid separation device for separating a mixed liquid in which a first liquid and a second liquid having different specific gravities are mixed into each liquid,
A body portion for retaining the mixed liquid therein;
A rectifying plate that contacts one part of the inner wall surface of the side surface of the body portion with one surface facing downward;
A liquid introducing means having an opening for discharging the mixed liquid in the body portion;
Upper discharge means that is provided on the body portion above the current plate and discharges one of the first liquid and the second liquid that are separated from each other to the outside with a smaller specific gravity,
A lower discharge means provided on the body portion below the opening and for discharging one of the first liquid and the second liquid separated from each other having a higher specific gravity to the outside;
The rectifying plate is located above the opening,
The liquid crystal separation device, wherein the opening is provided so as to discharge the mixed liquid in a horizontal direction along an inner wall surface of the body portion.
The liquid-liquid separator according to claim 1, wherein the opening portion is oriented in the horizontal direction.
The liquid-liquid separator according to claim 1 or 2, wherein the body portion has a circular or oval cross-sectional shape in the horizontal direction of the inner wall surface.
4. The opening according to claim 1, wherein the distance from the inner wall surface of the body portion is within a range shorter than half of the distance from the central axis of the body portion to the inner wall surface of the body portion. The liquid-liquid separator according to item 1.
The projected portion of the opening in the inner wall surface in the direction in which the mixed liquid is discharged is, in a horizontal section of the inner wall surface, of the tangent line of the inner wall surface and a tangent line parallel to the opening portion and the inner wall surface. The liquid-liquid separator according to any one of claims 1 to 4, which does not include a contact.
6. The liquid according to claim 1, wherein the liquid introducing means has a horizontal introducing portion extending in a horizontal direction, and the opening is provided at a tip of the horizontal introducing portion. Liquid separation device.
The rectifying plate has an arc-shaped portion, and the arc-shaped portion is in contact with the inner wall surface of the trunk portion, and 10% of the trunk portion in the vertical projection at the height of the abutting position of the rectifying plate. The liquid-liquid separator according to claim 4 or 5, which covers the above.
The liquid-liquid separator according to claim 7, wherein the rectifying plate has a bow shape or a fan shape.
The liquid-liquid separator according to claim 7 or 8, wherein the arc-shaped portion is in contact with an inner wall surface below a position where the upper discharge means is provided.
The liquid-liquid separator according to any one of claims 1 to 9, wherein the rectifying plate is provided horizontally.
The liquid-liquid separator according to any one of claims 1 to 10, wherein the rectifying plate has a plurality of through holes.