JPH05277402A - Turbid material separator - Google Patents

Abstract

PURPOSE:To provide a simple and compact turbid matter separator capable of sufficiently enhancing the separation efficiency of turbid matter. CONSTITUTION:The raw solution supplied into an outer cylindrical member 15 from a raw solution supply passage 1 forms a revolving stream to form a static pressure head in the diameter direction of the member 15. Air particles are moved to the central part of the member 15 by the buoyancy due to the static pressure head and a gasliquid mixed phase vortex stream is formed from air and the raw solution. The turbid matter in the raw solution is discharged to thick solution discharge passages 4, 5 by the gas-liquid mixed phase vortex stream. Further, the gas-liquid mixed phase vortex stream enters an inner cylindrical member 16 and an air rich layer is formed around a communication hole 17 by said vortex stream and the penetration of the turbid matter into a clarified solution discharge passage 3 is prevented by the air rich layer and the separation efficiency of the turbid matter is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbid matter separating apparatus using gas-liquid mixture and its vortex flow.

[0002]

2. Description of the Related Art A cyclone, which is one of separation devices for separating a heterogeneous component (eg, solid particles) contained in a fluid (gas or liquid) from the fluid (eg, actual application). (See Japanese Patent Laid-Open No. 63-152656). In a cyclone, generally, the undiluted solution is tangentially supplied to an outer cylinder composed of a cylindrical portion and a conical portion, and the centrifugal force due to the swirling flow generated in the outer cylinder causes the turbid matter to fall into the lower end of the outer cylinder (conical portion). The concentrated liquid with a high turbidity content is discharged from the lower end outlet while the clear liquid is discharged from the inner cylinder arranged at the upper end of the outer cylinder (cylindrical part). Such a cyclone has the advantages that it has a simple and compact structure and does not require a drive mechanism.

In the cyclone, the separation efficiency is substantially governed by the swirling flow velocity and swirling flow diameter of the liquid, that is, the strength of the centrifugal force, and the specific gravity difference between the fluid and the heterophase component. Of course, the separation efficiency also depends on the shape of the cyclone, such as the outer cylinder diameter and the inner cylinder diameter.

[0004]

By the way, such a cyclone is also used for separating a liquid containing turbidity into a concentrated liquid having a high content of turbidity and a clear liquid containing substantially no turbidity. And such a cyclone is a liquid cyclone
It is called (wet cyclone). However, in such a liquid cyclone, unlike in the case of the gas cyclone, the swirling flow velocity of the liquid cannot be increased so much, so that a strong centrifugal force cannot be obtained. Also,
The difference in specific gravity between the liquid and the turbidity is generally small, and the difference in specific gravity is very small, especially when the turbidity is an organic matter. Therefore, liquid cyclones have a relatively low separation efficiency and are not as popular as gas cyclones at the practical level.

In order to improve this, a liquid cyclone has been proposed in which compressed air is press-fitted into the stock solution, and the compressed air enhances the centrifugal force to enhance the separation efficiency (see Japanese Patent Laid-Open No. 57-24652). ). That is, when the gas is dispersed in the liquid, the apparent viscosity of the liquid is lowered, so that the swirling flow velocity is increased and the centrifugal force is increased accordingly. However, since the increase of the centrifugal force due to the press-fitting of the compressed air is not so large, the separation efficiency of the hydrocyclone has not been sufficiently increased.

The present invention has been made to solve the above-mentioned conventional problems, and provides a simple and compact turbid matter separating apparatus capable of sufficiently increasing the efficiency of separating turbid materials. With the goal.

[0007]

To achieve the above object, the first invention is to separate a stock solution containing turbid matter into a concentrated solution having a high turbidity content and a clear solution having a low turbidity content. A turbidity separator, (a) a stock solution supply passage for supplying a stock solution, (b) a gas injection means for dispersing and injecting a gas into the stock solution in the stock solution supply passage, and (c) an inlet from the stock solution supply passage The undiluted solution is swirled to generate a radial static pressure difference, and the static pressure difference causes the gas particles in the undiluted solution to move to the central portion to generate a gas-liquid mixed phase vortex flow, and the gas-liquid mixed phase vortex flow causes turbidity. A turbid matter separating section for concentrating the substance on one end side in the vortex flow axis direction to separate the stock solution into a concentrated solution and a clarified solution; (d) a concentrated solution discharge passage for discharging the concentrated solution in the turbid matter separating section; ) A clarified liquid discharge passage for discharging the clarified liquid in the turbid matter separating section is provided. Providing objects separator.

A second aspect of the invention is the turbidity separating apparatus according to the first aspect of the invention, in which (a) the turbidity separating portion is arranged substantially coaxially with the large-diameter outer cylinder member. And (b) the first end surface of the inner cylinder member is formed so as to be separated from the facing end surface of the outer cylinder member. A communication portion that connects the inner tubular member inner space portion and the outer tubular member inner space portion is formed, and the fining liquid discharge passage is connected to the second end surface of the inner tubular member, and (c) the outer circumferential surface of the outer tubular member. And a concentrated liquid discharge passage is connected to an end surface of the outer cylinder member facing the first end surface of the inner cylinder member, and the stock solution supply passage is connected to the outer cylinder member in the circumferential direction. A turbid matter separating device is provided.

According to a third aspect of the invention, in the turbidity separating apparatus according to the second aspect of the invention, the first end surface of the inner tubular member is formed in a flat plate shape, and a communication portion is provided at a substantially central portion thereof. There is provided a turbid matter separating apparatus, which is characterized by the above.

According to a fourth aspect of the present invention, in the turbidity separating apparatus according to the second aspect, the first end surface of the inner tubular member is formed in a tapered shape so as to bulge outward, and the communicating portion is provided at the top thereof. Provided is a turbid matter separating device characterized by being provided.

A fifth aspect of the present invention is the turbidity separating apparatus according to any one of the second to fourth aspects of the invention, wherein the first end surface of the inner tubular member is a circle projecting outward while surrounding the communicating portion. Provided is a turbid matter separating device, which is provided with a tube member.

A sixth aspect of the invention is a turbidity separating apparatus according to any one of the second to fourth aspects of the invention, wherein the first end surface of the inner tubular member is a circle protruding inward while surrounding the communicating portion. Provided is a turbid matter separating device, which is provided with a tube member.

A seventh aspect of the present invention is to bring a stock solution and a gas into contact with each other,
A gas-liquid contact device for effecting mass transfer between gas and liquid,
(a) an undiluted solution supply passage for supplying undiluted solution, (b) a gas injection means for injecting a predetermined gas by dispersing a predetermined gas in the undiluted solution supply passage, and (c) swirling the undiluted solution flowing from the undiluted solution supply passage. A radial static pressure difference is generated, the gas particles in the stock solution are moved to the central portion by the static pressure difference, a gas-liquid mixed phase vortex flow is generated in the central portion, and the gas-liquid mixed phase vortex flow causes a mass transfer rate between gas and liquid. And a gas-liquid discharge passage for discharging the gas and the liquid after the gas-liquid contact (d).

[0014]

EXAMPLES Examples of the present invention will be specifically described below.
As shown in FIGS. 1 to 3, the turbid matter separating apparatus S1 basically injects a slurry-like stock solution obtained by mixing a liquid and an insoluble turbid material by dispersing air. Then, it is supplied to the turbid matter separating section 2 through the undiluted solution supply passage 1, and in the turbid matter separating section 2, it is separated into a clear solution containing almost no turbid matter and a concentrated solution (sludge) having a high turbidity content rate, The clarified liquid is discharged through the clarified liquid discharge passage 3, while the concentrated liquid is discharged through the upper concentrated liquid discharge passage 4 and the lateral concentrated liquid discharge passage 5. The stock solution supply rate is adjusted by the first valve 6, the clear solution discharge rate is adjusted by the second valve 7, and the concentrated solution discharge rate from the upper concentrated solution discharge passage 4 and the lateral concentrated solution discharge passage 5 is Each of them is adjusted by the third valve 8 and the fourth valve 9. As will be described later, the upper concentrated liquid discharge passage 4 discharges air and components having a specific gravity or small particle size in the turbid material, and the lateral concentrated liquid discharge passage 5 discharges specific gravity in the turbid material. Or, a component having a large particle size is discharged.

The specific structure of each part of the turbidity separating apparatus S1 will be described below. The stock solution supply passage 1 includes an ejector 1
1 is interposed, and the negative pressure of the ejector 11 sucks air from the air supply passage 12. The air flow rate is adjusted by the air adjusting valve 13. Air is finely dispersed by the ejector 11 and injected into the stock solution.

The turbid matter separating portion 2 is provided with a substantially conical outer cylinder member 15 that narrows downward and a substantially conical inner cylinder member 16 that is disposed in the outer cylinder member 15 and narrows downward. ..
Here, the upper end portion 16a of the inner tubular member 16 is the outer tubular member 15
The upper end portion 15a is spaced apart from the upper end portion 15a by a predetermined distance. Then, the upper end portion 16a of the inner tubular member 16 is formed in a blunt conical shape that slightly bulges outward, and a space portion inside the inner tubular member 16 and a space portion inside the outer tubular member 15 (however, at the top thereof). ,
A communication hole 17 for communicating with the outside of the inner cylinder member) is formed. Further, the bottom portion of the inner tubular member 16 is joined to the bottom portion of the outer tubular member 15, and the inner tubular member 16 has a lower end portion at the outer tubular member 15.
It has been partitioned. The stock solution supply passage 1 is opened on the inner peripheral surface of the outer cylinder member 15 so as to be oriented substantially in the outer cylinder member circumferential direction. Therefore, the stock solution that has flowed into the outer cylinder member 15 from the stock solution supply passage 1 generates a swirling flow in the outer cylinder member 15.

A lower pipe 18 is provided at the lower end of the inner tubular member 16.
Is connected, and the other end of the lower pipe 18 is connected to the clarified liquid discharge passage 3. A gas-liquid mixed phase eddy current locking member 20 supported by a supporting member 19 is provided near the lower end of the lower pipe 18. The gas-liquid mixed phase vortex flow locking member 20 is provided to prevent a gas-liquid mixed phase vortex, which will be described later, from entering the downstream side.

An upper pipe 21 is connected to an upper end portion 15a of the outer cylinder member 15, and an upper concentrated liquid discharge passage 4 is inserted into the upper end portion of the upper pipe 21 from the upper side to the lower side. Therefore, the upper pipe 21 has a double pipe structure near the upper end thereof. Also, the upper pipe 2
In the vicinity of the upper end portion of 1, the lateral concentrated liquid discharge passage 5 is opened in the inner peripheral surface of the upper pipe 21 so as to be oriented substantially in the circumferential direction of the upper pipe member.

FIG. 4 shows a second turbid matter separating device S2 which is basically the same as the turbid substance separating device S1 described above, but slightly different in the following points. That is, as shown in FIG. 4, in the turbid matter separating apparatus S2, the outer cylinder member 15 ′ is provided.
And the inner cylinder member 16 'are formed in a substantially cylindrical shape. Further, a circular pipe member 24 is provided on the upper end portion 16′a of the inner tubular member 16 ′ so as to surround the communication hole 17 and project inside (downward) of the inner tubular member 16 ′. The circular tube member 24 has a function of increasing the efficiency of separating turbid substances. The circular tube member 24 may be projected outward (upward). Further, two sets of the lateral concentrated liquid discharge passage 5 and a valve 9 for opening and closing the same are provided to enhance the vortex flow near the upper end of the upper pipe 21. A spare passage 25 is connected to the peripheral surface of the outer cylinder member 15 ′, and the other end of the spare passage 25 is closed by a flange 26. The two turbid matter separating devices S1 and S2 shown in FIGS. 1 to 4 are vertically arranged, but they may be horizontally arranged.

The function or action of the turbid matter separating apparatus S2 shown in FIG. 4 will be described below as an example. Outer cylinder member 1
The flow characteristics of the liquid in 5'or the inner cylinder member 16 'are shown in FIG.
They are as shown in (a), (b) and (c). As is apparent from FIGS. 5 (a), 5 (b) and 5 (c), the stock solution supply passage 1 through the outer cylinder member 1 is accompanied by air.
The undiluted solution that has flowed into the 5'generates a swirling flow in the outer cylinder member 15 '.

As shown in FIG. 8, the swirling flow forms a core portion in which the swirling flow velocity is substantially proportional to the swirling radius in the vicinity of the central portion (r _{0 to} r ₁ ) and outside the core portion (r ₁ to r ₁ ). At r ₂ ), the swirling velocity forms a quasi-free vortex part, which is almost inversely proportional to the swirling radius.
Therefore, a centrifugal force distribution G (r) is formed in the outer cylinder member 15 ', and a static pressure distribution P (r) is formed by the centrifugal force distribution. The static pressure distribution in the vertical direction is as shown in FIG. 9, and the static pressure between A and C is particularly low. Generally, the static pressure distribution in the radial direction is obtained by integrating the centrifugal force distribution. That is, static pressure P and centrifugal force G
The relationship expressed by the following Expression 1 is established between the two.

[Formula 1] dP / dr = ρ · d (r · G) / dr ………………………………………………………………………………………………………………………………………………………………………………………………………………………………. The pressure is highest at the peripheral portion (r ₂ ) and rapidly decreases toward the central portion (r ₀ ). Therefore, due to the static pressure distribution or the static pressure drop ΔP, the air particles in the liquid in the outer cylinder member 15 ′ have a very strong buoyancy acting toward the center.

Therefore, as shown in FIG. 6, in the outer cylinder member 15 ', the air particles swirl and rapidly move to the center portion, and liquid and air are collected in the center portion of the outer cylinder member 15'. Vortex that violently swirls in different phase, so-called gas-liquid mixed-phase vortex T
₂ (tornado) occurs. The gas-liquid mixed phase vortex T ₂ rises in the upper pipe 21 while swirling violently and reaches the upper concentrated liquid discharge passage 4. Here, the suspended matter floating in the liquid rises while swirling in the upper pipe 21 together with the gas-liquid mixed phase vortex T ₂ . Then, the components having a large specific gravity or large particle diameter in the turbid matter are concentrated on the peripheral side of the upper pipe 21 due to the strong centrifugal force, and the components having a small specific gravity or small particle diameter are not subjected to the strong centrifugal force so that the upper pipe 21 is Many gather near the center of the city. Therefore, a concentrated liquid containing air and a component having a specific gravity or a small particle size is discharged from the upper concentrated liquid discharge passage 4, and a concentrated liquid containing a component having a specific gravity or a large particle size is discharged from the lateral concentrated liquid discharge passage 5. Is discharged.

The liquid in the inner cylinder member 16 'is discharged through the lower pipe 18 and the clearing liquid discharge passage 3 as described above. Therefore, a part of the liquid inside the outer cylinder member 15 ′ (outside the inner cylinder member) is part of the inner cylinder member 16 ′ through the communication hole 17.
Flows in. At this time, the air particles gathered in the vicinity of the central portion due to the static pressure drop ΔP suddenly abruptly move to the inner cylinder member 16 ′.
The inner cylinder member 1 enters the inside and is caused by the air particles.
A gas-liquid mixed-phase vortex T ₁ is also generated in 6 ′. The gas-liquid mixed phase vortex T ₁ flows into the lower pipe 18 along with the downward flow of the liquid. However, since the gas-liquid mixed phase vortex flow locking member 20 is provided near the lower end of the lower pipe 18, the gas-liquid mixed phase vortex flow T ₁ does not enter the downstream side.

As shown in the enlarged view of FIG. 7, when the gas-liquid mixed phase vortex T ₁ is formed, first, the liquid layer 33 containing a large amount of air particles is pressed against the outer peripheral portion of the inner cylindrical member 16 '. A large amount of air particles 32 inside pass through the communication hole 17 and the inner cylinder member 1
Go inside 6 '. At this time, a layer in which the air particles 32 are densely formed is formed in a region slightly below the communication hole 17.
The layer in which the air particles 32 are dense prevents the turbid particles 31 from entering the inner cylindrical member 16 ′. That is,
A filter action is exerted on the turbid particles 31. Therefore, the turbid substance does not enter the inner tube member 16 ′, and the clarified liquid containing almost no turbid substance is discharged from the clarified liquid discharge passage 4. With such a simple structure, the undiluted solution supplied from the undiluted solution supply passage 1 to the turbid matter separating section 2 has a very high separation efficiency and a clear solution containing almost no turbidity, and a specific gravity or a particle size smaller than that of air. It is separated into a concentrated liquid containing a turbid component and a concentrated liquid containing a turbid component having a large specific gravity or particle size.

By the way, in such a turbid matter separating apparatus, when the air particles move to the central portion due to the static pressure drop ΔP in the outer cylindrical members 15 and 15 ', the air particles rapidly expand due to the decrease in static pressure. Gas-liquid contacts violently, and the gas-liquid contact area becomes very large. In addition, the gas-liquid violently contacts even in the gas-liquid mixed-phase vortex.

Therefore, as shown in FIG. 10, if the portion below the lower pipe is not provided or the valve of the clear liquid discharge passage is completely closed, the turbid matter cannot be separated, but the gas-liquid is violently violent. Can be contacted. In addition,
The radial centrifugal force distribution and static pressure distribution in this case are shown in FIG.
It is as 1. Therefore, the device shown in FIG. 10 can be used as a gas-liquid contact device. For example, the gas Y1 having a high solubility (small Henry constant) can be effectively absorbed in the predetermined liquid X1. In this case, the liquid X1 is passed through the stock solution supply passage 1 and the ejector 11
When the gas Y1 is supplied to the inside of the outer cylinder member 15 or the upper pipe 21, the gas-liquid violently contacts with the gas Y1 and the gas Y1 is effectively absorbed by the liquid X1. Further, the gas Y2 can be effectively removed from the liquid X2 containing the gas Y2 having low solubility (large Henry constant). In this case, when the liquid X2 is passed through the stock solution supply passage 1 and a predetermined inert gas is supplied to the ejector 11, the gas Y2 in the liquid X2 is effectively diffused into the inert gas in the outer cylinder member 15 or the upper pipe 21. To be done.

Further, the apparatus shown in FIG.
It has a sterilization function because a sudden change in static pressure occurs inside.
Therefore, by using this device, it is possible to sterilize a predetermined liquid without chemical injection. In this case, the ejector 1
The sterilization effect can be enhanced by supplying ozone to 1, or irradiating the liquid in the outer cylinder member 15 with ultraviolet rays or applying ultrasonic waves. Furthermore, the device shown in FIG. 10 utilizes its high gas-liquid contact property to promote dispersion (combustibility) of air in alcohol fuel or the like, promotion of catalytic action for gas-liquid reaction system, promotion of aggregation reaction, It can be used for promoting heat exchange action of a gas-liquid system.

Hereinafter, the results of various experiments conducted by the inventors of the present application in order to know the preferable configuration of the turbid matter separating apparatus according to the present invention, preferable operating conditions, and the like will be described. (1) Experiment 1 FIGS. 12 (a) to (f), FIGS. 13 (g) to (l) and FIGS. 14 (m) to (p)
Is a result of an experiment conducted under the following experimental conditions in order to know a preferable configuration such as the position, size, and communication hole diameter of the inner cylinder member. <Experimental conditions> Turbid matter separating part …… Large conical turbid matter ……………… Sawdust (3mm sieve under, specific gravity about 1.2) Liquid ………… Water undiluted liquid supply pressure …… 2K Here, the evaluation A means the separation effect / large, the evaluation B means the separation effect / medium, and the evaluation C means the separation effect / small. Note that this is the same in other experiments. From this Experiment 1, it is understood that the following is roughly understood: (a) The upper end portion of the inner tubular member is preferably flat plate-shaped or mountain-shaped which bulges outward. (b) It is not preferable that the upper end position of the inner tubular member is too high. (c) It is not preferable that the inner cylinder member is too large. (d) It is not preferable that the communication hole is too large.

(2) Experiment 2 FIGS. 15 to 17 show the results of an experiment conducted under the same conditions as in Experiment 1 to find out a preferable configuration of the upper end portion of the inner cylinder member. The evaluation numbers here are evaluation scores with 100 being the perfect score. From this Experiment 2, it can be seen that the followings are roughly understood: (a) It is not preferable that the upper end of the inner tubular member bulges inward (downward). (b) It is preferable to provide a circular pipe member around the communication hole of the inner tubular member.

(3) Experiment 3 FIGS. 18 to 19 were conducted under the same conditions as in Experiment 1 except that the stock solution supply pressure was 3K, in order to know the preferable configuration of the upper end of the inner tubular member and the preferable shape of the upper pipe. It is the result of the experiment conducted in. The evaluation numbers here are evaluation scores with 100 being the perfect score. In addition, Table 1 shows the experimental conditions and experimental results of Experiment 3 in more detail. Items 1 to 6 in Table 1 are shown in FIG.
Corresponding to (f), items 7 to 12 are shown in FIG.
Corresponds to (f).

[Table 1] From Experiment 3, the following can be seen. (a) The amount of clear water drawn is 40 to 50% of the stock solution supply
Is possible. (b) As for the upper shape of the upper pipe, the cylindrical shape is slightly preferable to the tapered shape.

(4) Experiment 4 FIGS. 20 to 22 show the results of an experiment conducted to find out the preferable configuration of the inner cylinder member under the following experimental conditions. <Experimental conditions> Turbid matter separation part …… Large cylindrical turbid matter ……………… Sawdust (3mm sieve under, specific gravity about 1.2) Liquid ………… Water stock solution supply pressure …… 3K , Here, the evaluation number is the SS concentration (m
g / l). In addition, Table 2 shows the experimental conditions and experimental results of Experiment 4 in more detail. Items 1 to 3 in Table 2 correspond to FIGS. 20 (a) to 20 (c), items 4 to 6 correspond to FIGS. 21 (a) to 21 (c), and items 7 to 9 correspond to FIGS. 22 (a) to 22 (c).

[Table 2] From this Experiment 4, the following facts can be seen (a) It is preferable that the inner cylinder member is small. (b) It is not preferable that the diameter of the communication hole exceeds 20 mm. (c) Even if the amount of the clear water drawn out exceeds 50% of the amount of the undiluted solution supplied, the separation effect does not decrease, and the stability is higher than that of the conical type.

[0032]

According to the first aspect of the present invention, the gas-liquid mixed-phase vortex flow composed of the liquid and the air particles moving to the center due to the buoyancy caused by the static pressure difference generated in the turbid matter separating portion causes The turbidity is discharged to the concentrated liquid discharge passage, and the filter effect of the air that has moved to the center portion prevents the turbidity from entering the clear liquid discharge passage. it can.

According to the second invention, basically, the same operation and effect as those of the first invention can be obtained. Furthermore, since a strong static pressure drop occurs in the outer cylinder member, the separation efficiency can be further enhanced with a simple configuration.

According to the third invention, basically, the same operation and effect as those of the second invention can be obtained. Further, since the first end surface of the inner cylinder member is formed in a flat plate shape, the turbidity separating property by the gas-liquid mixed phase vortex and the filter effect of air particles are further enhanced.

According to the fourth invention, basically, the same operation and effect as those of the second invention can be obtained. Furthermore, since the first end surface of the inner tubular member is formed in a tapered shape that bulges outward, the turbidity separating property due to the gas-liquid mixed phase vortex flow and the filter effect of air particles are further enhanced.

According to the fifth invention, basically, the same action and effect as any one of the second to fourth inventions can be obtained. Further, the circular tube member protruding outwardly further enhances the turbidity separating property by the gas-liquid mixed phase vortex and the filter effect of the air particles.

According to the sixth invention, basically, the same action and effect as any one of the second to fourth inventions can be obtained. Furthermore, the inwardly projecting circular tube member further enhances the turbidity separating property by the gas-liquid mixed phase vortex and the filter effect of air particles.

According to the seventh aspect of the invention, when the air particles move to the central part by the buoyancy resulting from the static pressure difference generated in the gas-liquid contact portion, they rapidly expand due to the decrease in static pressure. Is promoted. In addition, since the gas and the liquid violently contact each other in the gas-liquid mixed phase vortex, the mass transfer between the gas and the liquid is further promoted.

[Brief description of drawings]

FIG. 1 is an elevational view of a partial cross section of a turbid matter separating apparatus.

FIG. 2 is an explanatory plan cross-sectional view at the upper end position of the upper pipe of the turbid matter separating apparatus shown in FIG.

FIG. 3 is a plan cross-sectional explanatory view at a lower pipe lower end position of the turbidity separating apparatus shown in FIG.

FIG. 4 is a partial cross-sectional elevational view of another preferred turbidity separator.

5 (a) to 5 (c) are diagrams showing a liquid flow state in a turbid matter separating section.

FIG. 6 is a view showing the movement of air and the state of a gas-liquid mixed phase vortex in the turbid matter separating unit.

FIG. 7 is an enlarged view of the area around the communication hole in FIG. 6;

FIG. 8 is a diagram showing radial distribution characteristics of centrifugal force and static pressure.

FIG. 9 is a diagram showing a vertical distribution characteristic of static pressure.

FIG. 10 is a schematic view of a gas-liquid contact device.

FIG. 11 is a diagram showing radial distribution characteristics of centrifugal force and static pressure distribution.

12 (a) to 12 (f) are diagrams showing the results of an experiment conducted to know a preferable configuration of a turbid matter separating section.

13 (g) to (l) are diagrams showing the results of an experiment conducted to find out a preferable configuration of the turbid matter separating section.

14 (m) to (p) are diagrams showing the results of an experiment conducted to know a preferable configuration of a turbid matter separating section.

FIG. 15 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member.

FIG. 16 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member.

FIG. 17 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member.

FIG. 18 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member and the upper pipe.

FIG. 19 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member and the upper pipe.

FIG. 20 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member.

FIG. 21 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member.

FIG. 22 is a diagram showing a result of an experiment conducted to know a preferable configuration of the inner cylinder member.

[Explanation of symbols]

 S1, S2 ... Turbid matter separating device 1 ... Stock solution supply passage 2 ... Turbid matter separating section 3 ... Clarified liquid discharge passage 4 ... Upper concentrated liquid discharge passage 5 ... Horizontal concentrated liquid discharge passage 11 ... Ejector 12 ... Air supply passage 15 ... Outer tubular member 15a ... upper end portion 16 ... inner tubular member 16a ... upper end portion 17 ... communication hole 24 circular pipe member

Claims (7)

[Claims] 1. A turbid matter separating apparatus for separating a stock solution containing a turbid material into a concentrated solution having a high turbid material content and a clear solution having a low turbid material content, comprising a stock solution supply passage for supplying the stock solution. A gas injection means for dispersing and injecting a gas into the undiluted solution in the undiluted solution supply passage and a swirl of the undiluted solution flowing in from the undiluted solution supply passage to generate a radial static pressure difference, and the static pressure difference causes the gas particles in the undiluted solution to be centered. To produce a gas-liquid mixed phase vortex flow in the central part, and the gas-liquid mixed phase vortex flow concentrates the turbidity on one end side in the vortex flow axis direction to separate the stock solution into a concentrated solution and a clarified solution. And a clear liquid discharge passage for discharging the clear liquid in the turbid matter separating unit, and a turbid liquid separating apparatus for discharging the concentrated liquid in the turbid matter separating unit. 2. The turbidity separating apparatus according to claim 1, wherein the turbidity separating section has a large-diameter outer cylinder member, and a small-diameter inner cylinder member arranged substantially coaxially in the outer cylinder member. And a first end surface of the inner tubular member is formed so as to be separated from an opposing end surface of the outer tubular member, and the inner tubular member inner space portion and the outer tubular member are formed on the first end surface. A communication portion that communicates with the member inner space portion is formed, a fining liquid discharge passage is connected to the second end surface of the inner cylinder member, and a stock solution supply passage is formed on the peripheral surface of the outer cylinder member in the outer cylinder member circumferential direction. The concentrated liquid discharge device is characterized in that a concentrated liquid discharge passage is connected to an end surface of an outer cylinder member that is directionally connected and is opposed to the first end surface of the inner cylinder member. 3. The turbidity separating apparatus according to claim 2, wherein the first end surface of the inner tubular member is formed in a flat plate shape, and a communication portion is provided at a substantially central portion thereof. And a turbid matter separation device. 4. The turbidity separating apparatus according to claim 2, wherein the first end surface of the inner tubular member is formed in a tapered shape that bulges outward, and a communication portion is provided at the top thereof. The turbidity separation device characterized by being. 5. The turbidity separating apparatus according to any one of claims 2 to 4, wherein the first tubular member has a first end surface of the inner tubular member that projects outward while surrounding the communication portion. The turbidity separation device is provided with. 6. The turbidity separating apparatus according to any one of claims 2 to 4, wherein the first tubular member has a first end surface of the inner tubular member that projects inward while surrounding the communication portion. The turbidity separation device is provided with. 7. A gas-liquid contact device for bringing a stock solution and a gas into contact with each other to perform mass transfer between the gas and the liquid, the stock solution supply passage supplying the stock solution, and a predetermined gas for the stock solution in the stock solution supply passage. The gas injection means for dispersing and injecting the solution and the stock solution flowing from the stock solution supply passage are swirled to generate a static pressure difference in the radial direction, and the static pressure difference moves the gas particles in the stock solution to the central part, and to the central part. A gas-liquid contact portion for generating a gas-liquid mixed-phase vortex and increasing the mass transfer rate between the gas and the liquid by the gas-liquid mixed-phase vortex, and a gas-liquid discharge passage for discharging the gas and the liquid after the gas-liquid contact are provided. A gas-liquid contact device characterized in that