JP2020081940A - Static mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of clogging due to a long substance mixed in a liquid, and to promote agitation and mixing of a fluid and a flow of a fluid. SOLUTION: A first ring 7 is provided inside a main body pipe 1 having a lid plate 5 and a bottom plate 2, an outlet pipe 6 is connected to the upper part of the main body pipe, and the outlet pipe 6 is inserted into a central portion of the lid plate 5. A connecting cylinder 4 having an annular convex portion 14 is connected to the downstream side of the fixed inlet pipe assembly 3, a first passage 11 is provided between the lower portion of the connecting cylinder and the first ring 7, and the first ring 7 is provided with a first passage 11. A second passage 12 is provided between the annular convex portion 14 formed to have substantially the same diameter as the inner diameter and the main body pipe 1, and the first mixing action chamber 8 and the main body formed by the main body pipe 1, the bottom plate 2, and the first ring 7. A first passage 11 is provided between the pipe 1 and the second action chamber 9 formed by the annular convex portion 14, and the second mixing action chamber 9, the inlet pipe assembly 3, and the annular convex portion 14 of the connecting cylinder 4 are provided. A second passage 12 is provided between the third mixing action chamber 10 formed by the lid plate 5 and the third mixing action chamber 10. [Selection diagram] Fig. 1

Description

The present invention relates to a static mixer which solves the problem of clogging of a flow path due to a long substance mixed in a fluid and has a low pressure loss.

In order to efficiently stir and mix fluids such as gas, liquid, powder, etc., a mixing means is provided in the flow path to generate turbulence (turbulent flow such as vortex flow) in the flow path and make the fluid effective. A static mixer is widely known as a device for mechanically stirring and mixing, and its structure is also diverse. In particular, as a static mixer for efficiently agitating a fluid, a ring portion having a plurality of agitating projections is provided on the inner surface of the inflow pipe of the flow channel (Patent Document 1). Further, there is known one in which a front propeller and a rear propeller are rotatably attached to a rotary shaft orifice plate in a pipe in a flow path to efficiently agitate a fluid (Patent Document 2).

Japanese Unexamined Patent Publication No. 4-44814 Japanese Patent Laid-Open No. 52-130058

However, since the former static mixer has wings provided in the centripetal direction of the flow path, long dust particles contained in the fluid easily get caught in the protruding pieces, and the flow path gradually clogs over time. This may increase the internal pressure and make it difficult to flow. In the latter static mixer, long dust is easily caught on the front propeller and the rear propeller rotatably provided on the orifice plate for the rotating shaft interposed in the pipe in the flow path, and the long object When is caught, there is a problem in that the internal pressure increases and the flow rate of the fluid flows decreases, making it difficult to flow.

Furthermore, in public water supply facilities or facilities that treat large amounts of water or sewage, such as sewers, the aeration tank that is part of the standard activated sludge facility uses a diffuser pipe blower to generate a large amount of air to generate fine air bubbles. Since the power cost is enormous, in the sewage treatment plant which is a public facility, the power cost associated with the air generation requires a great electricity cost cost equivalent to 40% of the power cost of the entire facility.

On the other hand, the sewage for treating sewage contains a lot of dust (hair and long string-like objects), and when a conventional static mixer is used to generate fine air bubbles for aeration, As described above, since the static mixer stirs the fluid, many stirring blades project in the centripetal direction in the flow path. Therefore, there is always a problem of "clogging" in which dust (hair or long string-like material) contained in flowing sewage is caught by the stirring blade or the propeller and the fluid flow is deteriorated. Therefore, the actual situation is that effective static mixers are not yet distributed in the trading market.

Therefore, in order to solve such a problem, the present invention provides a static mixer (hereinafter referred to as a mixer) arranged in a flow path even when hair or a long filamentous substance is mixed therein. It is an object to efficiently mix and mix fluids by improving efficiency of mixing fluids and reducing pressure loss by reducing internal power consumption, and reducing power consumption by reducing power consumption. It is a thing.

The first aspect of the present invention is to provide a first ring 7 inside a main body pipe 1 having a lid plate 5 and a bottom plate 2 and to connect an outlet pipe 6 above the main body pipe so that a central portion of the lid plate 5 is provided. The connecting pipe 4 having the annular convex portion 14 is attached to the downstream side of the inlet pipe assembly 3 which is inserted and fixed, and the first passage 11 is provided between the lower portion of the connecting pipe and the first ring 7, The second passage 12 is provided between the main body pipe 1 and the annular convex portion 14 formed to have the same diameter as the inner diameter of the first ring 7, and is formed between the main pipe 1, the bottom plate 2 and the first ring 7. The first mixing action chamber 8 and the second mixing action chamber 9 formed between the main body pipe 1 and the annular convex portion 14 are communicated with each other by the first passage 11, and the second mixing action chamber 9 and the main body pipe are connected. A second passage 12 is provided between the first mixing inlet 10 and the inlet pipe assembly 3, the annular convex portion 14 of the connecting cylinder 4, and the third mixing action chamber 10 formed by the cover plate 5. Further, a plurality of concave portions 60 having concave and convex surfaces are concentrically provided on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1, and the fluid flowing out from the lower portion of the inlet pipe assembly passes on the concave portions. It is characterized by doing so. Further, on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1, there are provided a plurality of spiral inclined plates 62 inclined from one end to the other end with each end flush with the surface of the bottom plate. It is characterized in that they are attached radially to each.

Therefore, by adopting a configuration in which the long substance flowing into the mixer is not caught in the device, a static mixer can be obtained in which fluid smoothly flows and pressure loss is small and stirring and mixing efficiency is high.

A second aspect of the invention is to attach a first ring 7 and a second ring 7a to a lower inner surface of a main body pipe 1 having a lid plate 5 and a bottom plate 2 with a space and connect an outlet pipe 6 to an upper portion of the main body pipe 1. Then, the first connecting cylinder 16 and the second connecting cylinder 17 are connected to the downstream side of the inlet pipe assembly 3 which is inserted and fixed in the central portion of the cover plate 5, and the annular convex portion 16a of the first connecting cylinder 16 and the first connecting cylinder 16 are connected. The inner diameters of the first ring 7 and the second ring 7a are formed to be substantially the same, and the first mixing action chamber 20 formed by the main body pipe 1, the bottom plate 2 and the first ring 7 is attached to the main body pipe 1. A first passage 22 is provided between the first ring 7 and the second mixing action chamber 21 formed by the annular convex portion 18 of the second connecting cylinder 17, and the annular convex portion 18 of the second connecting cylinder 17 and the main body pipe 1 are provided. The third mixing action chamber 25 formed by the second ring 7a attached to the third mixing action chamber 25 and the fourth mixing action chamber 27 formed by the second ring 7a and the annular projection 16a of the first connecting cylinder 16 A passage 26 is provided, a second passage 23 is provided between the main body pipe 1 and the annular convex portion 18 of the second connecting cylinder 17, and a second passage 7 is provided between the second ring 7a provided on the main body pipe and the first connecting cylinder 16. The third passage 26 is provided, and the fourth passage 28 is provided between the annular convex portion 16a of the first connecting cylinder 16 and the main body pipe 1. Further, a plurality of concave portions 60 having concave and convex surfaces are concentrically provided on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1 so that the fluid flowing out from the lower portion of the inlet pipe assembly may pass through the concave portions. It is characterized by having done. Further, on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1, there are provided a plurality of spiral inclined plates 62 inclined from one end to the other end with each end flush with the surface of the bottom plate. It is characterized in that they are attached radially to each

Therefore, since the fluid has an orifice effect due to a pressure change received when alternately passing through a plurality of narrow passages and a plurality of wide mixing action chambers, the fluid can be efficiently stirred and mixed to enhance the mixing effect. , It is possible to greatly reduce the pressure loss of the fluid. Therefore, when used in equipment for purifying a large amount of water or sewage, the power cost required for air generation can be greatly reduced, which is very economical.

3rd invention connects outlet pipe 6 to the 2nd bottom plate 2b attached to the bottom part of the long outer cylinder 30 provided in the outer periphery of the main body pipe 1 through the annular path 36, and connects the 2nd bottom plate 2b and the bottom plate 2. A lower passage 37 is provided between the outer pipe 30 and the inlet pipe assembly 3, which is fixed by being inserted into the central portion of the cover plate 5 attached to the upper portion of the outer pipe 30 and the main body pipe 1, and has an annular convex portion 33a on the downstream side. The pipe 33 is connected, and a first passage 34 is provided between the lower portion of the connection pipe and the first ring 7 provided on the main body pipe 1, and between the main body pipe 1 and the annular convex portion 33 a of the connection pipe 33. Is provided with a second passage 35, and a third passage 38 having a plurality of small holes provided on the upper peripheral surface of the main body pipe 1 is provided. Further, a plurality of concave portions 60 having concave and convex surfaces are concentrically provided on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1 so that the fluid flowing out from the lower portion of the inlet pipe assembly may pass through the concave portions. It is characterized by having done. Further, on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1, a plurality of spiral inclined plates 62 inclined from one end to the other end with each end flush with the surface of the bottom plate are provided. It is characterized in that it is attached to each part radially.

Therefore, the long outer cylinder 30 is attached to the outer periphery of the main body pipe 1 via the annular passage 36, so that the fluid changes in pressure when alternately passing through the plurality of narrow passages and the plurality of wide mixing action chambers. Since the orifice effect is obtained, the fluid can be efficiently stirred and mixed to enhance the mixing effect.

A fourth invention is an inlet pipe assembly in which an outlet pipe 6 is connected above a main body pipe 1 having a lid plate 5 and a bottom plate 2, and is inserted into the central portion of the lid plate 5 and fixed in the main body pipe 1. 3 is connected to the connecting cylinder 45 having an annular convex portion 45a on the downstream side, and an annular protruding portion 48 provided on the lower peripheral edge of the annular convex portion 45a of the connecting cylinder and a first internal portion provided below the main body pipe 1 are connected. It is characterized in that a narrow first passage 49 is provided between the ring 7 and the upper surface of the ring 7, and a narrow second passage 52 is provided between the outer periphery of the annular convex portion 45a and the main body pipe 1. Further, a plurality of concave portions 60 having concave and convex surfaces are concentrically provided on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1 so that the fluid flowing out from the lower portion of the inlet pipe assembly may pass through the concave portions. It is characterized by having done. Further, on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1, there are provided a plurality of spiral inclined plates 62 inclined from one end to the other end with each end flush with the surface of the bottom plate. It is characterized in that they are attached radially to each.

Therefore, when the fluid alternately passes through a plurality of narrow passages and a plurality of wide mixing action chambers, an orifice effect is obtained by the pressure change received from the mixer, so that the fluid is efficiently agitated and mixed, thereby agitating and mixing. The effect can be enhanced and the pressure loss of the fluid can be significantly reduced.

It is sectional drawing of a 1st static mixer. It is sectional drawing which showed the 1st modification of the connection cylinder attached to the 1st static mixer. It is sectional drawing which showed the 2nd modification of the connection cylinder attached to the 1st static mixer. It is sectional drawing which showed the modification of the inlet pipe assembly. It is sectional drawing of a 2nd static mixer. It is sectional drawing which showed the 1st modification of the 2nd connection cylinder attached to the 2nd static mixer. It is sectional drawing which showed the 2nd modification of the 2nd connection cylinder attached to the 2nd static mixer. It is sectional drawing of a 3rd static mixer. It is sectional drawing of a 4th static mixer. It is sectional drawing of the inlet pipe assembly and connection pipe which comprise the 4th static mixer. It is a bottom view of the connection cylinder shown in FIG. It is sectional drawing which showed the 1st modification of the bottom plate of the 1st-4th static mixer. It is the sectional view on the AA line of FIG. It is sectional drawing which showed the 2nd modification of the bottom plate of the 1st-4th static mixer. It is the BB sectional view taken on the line of FIG. It is explanatory drawing which showed the flow direction of the fluid from an inlet pipe assembly with respect to the spiral inclination board shown in the 2nd modification of a bottom plate. It is an enlarged plan view of a spiral inclined plate. FIG. 18 is an enlarged front view of the spiral inclined plate shown in FIG. 17.

An embodiment of the invention of a first static mixer A will be described with reference to the accompanying drawings. FIG. 1 is a sectional view of the first static mixer, and FIG. 2 is a first modification of a connecting cylinder attached to the first static mixer. FIG. 3 is a sectional view showing a second modification of the connecting cylinder attached to the first static mixer, and FIG. 4 is a sectional view showing a modification of the inlet pipe assembly. In the first static mixer A, a bottom plate 2 is provided at a bottom bottom portion of a pipe main body 1 which is formed in a tubular shape as a whole, a lid plate 5 is attached to an upper end thereof, and a fluid is introduced into a main body pipe through an attachment hole 5a provided at the center of the lid plate. 1, an inlet pipe assembly 3 to be flowed in is inserted and fixed.

An outlet pipe 6 for allowing the fluid in the main body pipe 1 to flow out is connected to a connection hole 1a provided on the upper side surface of the main body pipe 1, and a tubular portion 3a of the inlet pipe assembly 3 is provided on the downstream side of the inlet pipe assembly 3. The connecting cylinders 4 having substantially the same diameter are connected to each other, and a flange-shaped annular convex portion 14 is provided on the outer periphery of the upper end of the connecting cylinders. In this inlet pipe assembly 3, the connecting cylinder 4 having the annular convex portion 14 at the lower end of the cylindrical portion 3a is formed separately, but it may be integrally formed.

A first ring 7 located below the inlet pipe assembly 3 inserted and fixed in the main body pipe 1 is fixed to the main body pipe 1, and further, a first ring 7 is provided below the main body pipe 1 having a bottom plate 2 and a lid plate 5. The first ring 7 and the collar-shaped annular convex portion 14 provided in the circumferential direction above the connecting cylinder 4 provided at the lower portion of the tubular portion 3a forming the inlet pipe assembly 3 form the first mixing action chamber 8. Two mixing chambers 9 are formed. Furthermore, the annular convex portion 14 of the connecting cylinder 4 provided in the lower portion of the inlet pipe assembly 3 and the lid plate 5 provided in the main body pipe 1 form a third mixing action chamber 10, and the third mixing action chamber 10 is It communicates with the outlet pipe 6.

The first mixing action chamber 8 and the second mixing action chamber 9 are provided between the first ring 7 and the lower part of the connecting cylinder 4 connected to the inlet pipe assembly 3 fixed to the cover plate 5 attached to the main body pipe 1. The second mixing action chamber 9 and the third mixing action chamber 10 located above the second mixing action chamber 9 communicate with each other through the narrow first passage 11 and the narrow second passage 12 provided between the main body pipe 1 and the annular convex portion 14. It is in communication.

The fluid flowing out from the lower part of the connecting cylinder 4 connected to the inlet pipe assembly 3 flows from the lower part of the connecting cylinder 4 into the first mixing action chamber 8 through the inside of the first ring 7, collides with the bottom plate 2, and is inverted upward. Then, it rises through the outer portion of the fluid flowing down from the lower part of the connecting cylinder, and passes through the narrow first passage 11 provided between the lower part of the connecting cylinder 4 and the first ring 7 to the second mixing action chamber 9 Flow into. The fluid that has flowed into the second mixing action chamber 9 rises along the outer periphery of the connecting cylinder 4 and collides against the lower surface of the annular convex portion 14 so as to be reversed and becomes a turbulent flow such as a swirl flow or a collision flow. And collide with the upper surface of the first ring 7 to efficiently stir and mix.

The fluid agitated and mixed in the second mixing action chamber 9 rises along the outer periphery of the connecting pipe 4 of the main body pipe 1 and the inlet pipe assembly 3, and is narrowed between the annular convex portion 14 and the main body pipe 1. It flows into the third mixing action chamber 10 through the two passages 12, collides with the lid plate 5 and reverses, is disturbed and mixed in the third mixing action chamber 10, and then flows out from the outlet pipe 6 connected to the main body pipe 1. .. In this way, the orifice effect is obtained by the pressure change that the fluid receives when alternately passing through the narrow first and second passages 11 and 12 and the slightly wider mixing action chambers 8, 9 and 10, and the fluid is depressurized and pressurized. By repeating the above, stirring and mixing can be enhanced.

In FIG. 2, the connecting pipe 4a connected to the lower portion of the inlet pipe assembly 3 of the first embodiment is provided below the first ring 7 provided at the lower end of the tubular portion below the main pipe 1, that is, at the main pipe 1. By being located in the first working chamber 8 formed by the first ring 7 and the bottom plate 2, the fluid is compressed in the narrow first passage 11 between the first ring 7 and the connecting cylinder 4a to increase the pressure. After passing through, it flows into the second mixing action chamber 9 provided above the first mixing action chamber 8 and the pressure is reduced. The fluid from the second mixing action chamber 9 passes through the second passage 12 provided between the annular convex portion 14 and the main body pipe 1, enters the third mixing action chamber 10 located above, and reaches the lid plate. After colliding and reversing, it flows out from the outlet pipe 6. In this way, the pressure change exerted on the fluid when alternately passing through the flow path and the mixing action chamber can improve the efficiency of stirring and mixing the fluid.

In FIG. 3, the lower portion of the connecting cylinder 4b provided in the lower portion of the inlet pipe assembly 3 is formed to be longer than that shown in FIG. 1, and is located at an intermediate position of the inner diameter of the first ring 7 provided in the lower inside of the main body pipe 1. positioned. Therefore, the throttling effect of the fluid passing through the first passage 11 can be enhanced. That is, the fluids that are respectively pressured as they pass through the narrow first and second passages 11 and 12 are more agitated and mixed. Further, when the liquid passes through the narrow second passage 12 provided between the first ring 7 and the annular convex portion 14 provided on the upper portion of the connecting cylinder 4b, the liquid is pressurized and the pressure increases, and then the liquid having a slightly larger width. When the fluid flows into the first and second mixing action chambers, the pressure of the fluid is reduced and flows into the third mixing action chamber 10 formed on the outer periphery of the annular convex portion 14, the lid plate 5, the main body pipe 1, and the inlet pipe assembly 3. The agitated and mixed fluid flows out from the outlet pipe 6 connected to the main body pipe 1.

The inlet pipe assembly 3 is formed at a lower part thereof with a connecting cylinder 4 (FIG. 1), a connecting cylinder 4a formed longer than the connecting cylinder 4 (FIG. 2), and is formed longer than the connecting cylinder 4 and shorter than the connecting cylinder 4a. By arranging the lower part of the connecting cylinder 4b (FIG. 3) in the middle of the first ring 7 and changing the pressure of the fluid passing through the first passage 11, the effect of stirring and mixing can be enhanced. FIG. 4 shows another embodiment of the inlet pipe assembly 3d, in which an annular ring 7c having the same diameter as the outer diameter of the annular convex portion 14 is fixed at an intermediate position of the tubular portion to fix the inlet pipe assembly 3d. May be simply configured.

An embodiment of the invention of the second static mixer B will be described with reference to the accompanying drawings. FIG. 5 shows a sectional view of the second static mixer, and FIG. 6 shows a modification of the second connecting cylinder attached to the second static mixer. FIG. 7 is a sectional view showing a second modification of the second connecting cylinder attached to the second static mixer. In the second static mixer B, the bottom plate 2 is provided at the bottom of the main body pipe 1 formed into a tubular shape, and the inlet pipe assembly 3 is fixed by inserting the bottom plate 2 into the attachment hole 5a provided at the center of the lid plate 5 attached to the upper part. The lower part of the main body pipe 1, that is, the first ring 7 provided on the lower inner surface of the main body pipe 1 and above the first mixing action chamber 20 formed by the bottom plate 2, the first ring 7 and the second part of the inlet pipe assembly 3 are provided. A second mixing action chamber 21 is formed in the main body pipe 1 with the annular convex portion 18 of the connecting cylinder 17, and a narrow first passage 22 is provided between the first ring 7 and the lower portion of the second connecting cylinder 17, A narrow second passage 23 is formed by the pipe 1 and the annular convex portion 18 provided on the upper portion of the second connecting cylinder 17.

The second ring 7a is formed in the main body pipe by the second ring 7a provided on the upper inner surface of the main body pipe 1 and the annular convex portion 18 provided on the upper part of the second connecting cylinder 17. A narrow third passage 26 is formed between and the outer circumference of the first connecting cylinder 16. Further, the second ring 7a provided in the main body pipe 1 and the annular convex portion 16a provided at the upper portion of the first connecting cylinder 16 form the fourth mixing action chamber 27 communicating with the third mixing action chamber 25, A fourth passage 28 is formed between the inlet pipe assembly 3 connected to the annular convex portion 16 a of the first connecting cylinder 16 and the inner surface of the main body pipe 1.

The fluid flowing out from the lower part of the inlet pipe assembly 3 flows into the first mixing action chamber 20 from the lower end of the second connecting cylinder 17 through the first ring 7, collides with the bottom plate 2 and reverses to form a narrow first passage. It flows into the 2nd mixing action chamber 21 through 22 and further rises, collides with the annular convex part 18 of the 2nd connection cylinder 17, inverts, and stirs.

Then, it flows from the second mixing action chamber 21 through the narrow second passage 23 into the third mixing action chamber 25 formed in the main body pipe 1 by the annular convex portion 18 of the second connecting cylinder 17 and the second ring 7a. After colliding with the lower surface of the second ring 7a and turning over, the fourth convex portion formed in the main body pipe 1 by the annular convex portion 16a provided in the first connecting cylinder 16 through the third passage 26 and the second ring 7a. It flows into the mixing action chamber 27, further passes through the fourth passage 28 provided in the upper portion of the main body pipe 1, and flows out from the outlet pipe 6 communicating with the main body pipe. As described above, the pressure is reduced when passing through the first, second, third, and fourth mixing action chambers 20, 21, 25, and 27 which are respectively wide, and the first, second, third, and fourth passages are also provided. The pressure rises when passing through 22, 23, 26 and 28, and the orifice effect is obtained by repeatedly receiving the pressure change in this way, so that the stirring and mixing ratio of the fluid can be increased.

FIG. 6 shows a first modified example of the second connecting cylinder, in which the second connecting cylinder 17a connected to the lower portion of the inlet pipe assembly 3 via the first connecting cylinder 16 has a long cylindrical portion. It is formed, and its lower end position is projected into the first mixing action chamber 20 below the position of the first ring 7. That is, the fluid flowing out from the lower part of the second connecting cylinder 17a flows into the first mixing action chamber 20, collides with the bottom plate 2 and is inverted, and is provided between the first ring 7 and the outer periphery of the second connecting cylinder 17a. While passing through the narrow first passage 22, the fluid is pressurized and flows into the second mixing action chamber 21 while increasing the pressure and is depressurized. Next, the fluid collides with the lower surface of the annular convex portion 18 provided on the upper portion of the second connecting cylinder 17a and is inverted, and then the narrow first portion provided between the annular convex portion 18 of the second connecting cylinder 17a and the main body pipe 1 is provided. It flows into the third mixing action chamber 25 through the second passage 23. The fluid that has flowed into the third mixing action chamber 25 collides with the lower surface of the second ring 7a, inverts, and rises, and the third narrow space provided between the second ring 7a and the outer periphery of the first connecting cylinder 16 is provided. It flows into the fourth mixing action chamber 27 through the passage 26, and then flows out of the outlet pipe 6 through the fourth passage 28. In this way, the fluid can be efficiently stirred and mixed while repeating inversion, collision, pressurization, and depressurization.

FIG. 7 shows a second modification of the second connecting cylinder, and the lower end position of the second connecting cylinder 17b connected to the lower portion of the inlet pipe assembly 3 via the first connecting cylinder 16 is shown in FIG. It is formed shorter than that of the first ring, and is located in the middle of the first ring 7. That is, by arranging the outlet of the second connecting cylinder 17b in the middle of the first ring 7, the fluid flows into the first working chamber 20 through the first ring 7, collides with the bottom plate 2 and is inverted to the first position. The pressure of the fluid is increased when passing through the narrow first passage 22 provided between the first ring 7 and the lower end of the second connecting cylinder 17b, and then, when the fluid flows into the second working chamber 21, the pressure is reduced, and The fluid whose pressure has been increased again through the narrow second passage 23 provided between the annular convex portion 18 of the connecting cylinder 17b and the main body pipe 1 flows into the third working chamber 25 and rises while the pressure decreases. ..

Further, the fluid collides with the lower surface of the second ring 7a and is inverted while being pressurized in the narrow third passage 26, passes through the fourth mixing action chamber 27, and is depressurized. The fluid that has flowed into the fourth mixing action chamber 27 collides with the lower surface of the annular convex portion 16 a of the first connection cylinder 16 and rises while reversing and flows out of the outlet pipe 6 through the fourth passage 28. .. As described above, the fluid is subjected to the pressure change when repeatedly passing through the narrow passage and the wide action chamber, so that the stirring effect can be enhanced.

An embodiment of the invention of a third static mixer C will be described with reference to the accompanying drawings. FIG. 8 is a sectional view of the third static mixer. The third static mixer C includes a first ring 7 provided in a tubular main body pipe 1 and a bottom plate 2 provided on the bottom surface to provide a first mixing action chamber 40 in the lower portion of the main body pipe 1. The lid plate 5 is mounted on the upper part of the outer cylinder 30 and the upper part of the outer cylinder 30 installed on the outer circumference of the main body pipe 1, and the outlet pipe 6 is mounted on the mounting opening 31 provided at the center of the second bottom plate 2b mounted on the lower part of the outer cylinder 30. There is.

The inlet pipe assembly 3 is inserted and fixed in a mounting port 5a provided in the central portion of the lid plate 5, and the lower end of the inlet pipe assembly 3 is positioned above the first ring 7 fixed to the lower inner surface of the main body pipe 1, A narrow first passage 34 is provided between the first ring 7 and the lower portion of the connecting cylinder 33 connected to the downstream side of the inlet pipe assembly 3. A first mixing action chamber 40 is provided in the lower portion of the main body pipe 1 having the first ring 7 and the bottom plate 2, and the first mixing action chamber 40 is provided in the main body pipe by the first ring and the annular convex portion 33a of the connecting cylinder 33. 41 is formed, and the third mixing action chamber 42 is provided in the main body pipe 1 by the annular convex portion 33a and the lid plate 5.

A narrow second passage 35 is formed between the main body pipe 1 and the annular convex portion 33a of the connecting pipe 33 connected to the lower portion of the inlet pipe assembly 3, and an annular communication passage is formed between the main body pipe 1 and the outer cylinder 30. 36 is provided, and a third passage 38 formed of a plurality of small holes communicating with the communication passage 36 of the outer cylinder 30 is provided on the upper peripheral surface of the main body pipe 1 and is attached to the second bottom plate 2 b and the lower portion of the main body pipe 1. A lower passage 37 communicating with the communicating passage 36 is provided between the lower plate 37 and the bottom plate 2.

The fluid flowing from the lower part of the inlet pipe assembly 3 inserted into and fixed to the main body pipe 1 flows into the first mixing action chamber 40 provided at the lower part of the main body pipe 1 through the first ring 7 and collides with the bottom plate 2. Then, it rises while reversing and flows into the second mixing action chamber 41 through the first passage 34 provided between the first ring 7 and the lower portion of the connecting cylinder 33 provided at the lower portion of the inlet pipe assembly 3. The fluid that has risen along the main body pipe 1 and the connecting tube 33 collides with the annular convex portion 33a and is inverted and stirred and mixed, and further, a narrow second passage provided between the annular convex portion 33a and the main body pipe 1. After passing through 35, it flows into the third mixing action chamber 42 formed by the annular convex portion 33 a and the cover plate 5 in the main body pipe 1. Further, the fluid passes through a plurality of third passages 38 provided above the third mixing action chamber 42, a communicating passage 36 in the outer cylinder 30 outside the main body pipe 1, and further passes through a lower passage 37 to form a bottom plate. It flows out from the outlet pipe 6 connected to 2b. Thus, the stirring and mixing can be further enhanced by the collision of the fluid and the pressure which the fluid receives when it alternately passes through the narrow passage and the wide mixing action chamber.

An embodiment of the invention of a fourth static mixer D will be described with reference to the accompanying drawings. FIG. 9 is a cross-sectional view of the fourth static mixer, and FIG. 10 is an inlet pipe assembly and a connecting tube which constitute the fourth static mixer. 11 is a bottom view of the connecting cylinder shown in FIG. In the fourth static mixer D, the bottom plate 2 is attached to the lower end of the tubular pipe body 1, the lid plate 5 is attached to the upper end, and the inlet pipe assembly 3 is inserted into the attachment hole 5a provided in the central portion of the lid plate 5. And connecting the connecting pipe 45 having the same diameter as that of the inlet pipe assembly at the lower portion of the inlet pipe assembly, and providing a collar-shaped annular convex portion 45a on the outer periphery of the upper portion of the connecting pipe. A protrusion 48 is formed on the outer peripheral edge of the lower surface of the. The protruding portion 48 is located slightly above the first ring 7, a narrow first passage 49 is provided between the first ring 7 and the lower end of the protruding portion 48, and an annular convex portion provided on the connecting cylinder 45 is further provided. A narrow second passage 52 is continuously provided between the outer periphery of 45a and the main body pipe 1, and the first passage 49 is formed narrower than the second passage 52.

Therefore, the fluid flowing from the inlet pipe assembly 3 flows into the first mixing action chamber 50 provided below the first ring 7 attached to the main body pipe 1, collides with the bottom plate 2, and is inverted. Then, the fluid collides with the annular concave groove 47 provided on the lower surface of the annular convex portion 45a and is reversed, and a very narrow first gap between the first ring 7 and the protruding portion 48 provided on the outer peripheral lower surface of the annular convex portion 45a. One passage 49, and further, a narrow second passage 52 is continuously passed between the main body pipe 1 and the annular convex portion 45a to flow into the second mixing action chamber 50 in the main body pipe 1 for stirring and mixing. It flows out from the outlet pipe 6. As described above, since the extremely narrow passage 49 and the narrow second passage 52 are provided adjacent to each other, and further, the first working chamber 50 and the second mixing working chamber 51 located above and below the passage 49 are provided, the flowing fluid is changed. A large pressure change occurs, and the stirring effect of the fluid can be enhanced even with a small and compact structure.

FIG. 12 shows a second embodiment of the bottom plate 2 attached to the main body pipe 1 which constitutes the first, second, third, fourth static mixer A, B, C, D of the present invention. It is a plan view showing a state of being cut horizontally, and a recessed portion 60 having a plurality of steps having an arbitrary shape in the circumferential direction from the center of the main body pipe 1 is provided at an arbitrary position on the surface of the bottom plate 2. Therefore, as shown in FIG. 13, the fluid flowing from the main body pipe 1 into the first mixing action chamber 20 utilizes the step between the portion having the concave portion 60 on the surface and the flat portion of the bottom plate 2, and the bottom plate 2 The flow of the fluid that collides with can be disturbed and mixed by stirring. In the figure, t represents the depth of the recess 60.

FIG. 14 shows a third embodiment of the bottom plate 2 attached to the main body pipe 1 constituting the first, second, third, and fourth static mixers A, B, C, and D of the present invention. In a plan view showing a state of being cut horizontally, a plurality of spiral inclined plates 62 are arranged in a radial direction from the central portion of the main body pipe 1, and the spiral inclined plates 62 are viewed from a plane as shown in FIG. And is formed in an arc shape. That is, as shown in FIG. 15, the fluid that has collided with the inner bottom surface is installed so as to flow onto the bottom plate so as to flow against the spiral inclined plate 62 in the flow path indicated by the arrow. In the figure, t indicates the height of the spiral inclined plate.

As shown in FIG. 16, this spiral inclined plate 62 has one end of the spiral inclined plate 62 radially positioned from the center of the bottom plate 2 formed to be the same as the surface of the bottom plate 2 as shown in FIG. The fluid flowing from the inlet pipe assembly 3 is formed in an arc shape so as to rise while swirling when hitting the inner bottom surface. That is, when the fluid swirls along the bottom plate 2 in the first mixing action chamber 20, one end of the spiral sloping plate 62 is formed flat with the surface of the bottom plate even if the slender filamentous substance is mixed in the fluid. Since it can be made to flow together with the fluid without being caught, the thread-like long object is not caught and clogged. That is, even when a long substance enters between the spiral inclined plates 62, since the plurality of spiral inclined plates 62 are radially provided, the long substance is guided upward along the inclined surface provided on the upper surface and flows. Therefore, the filamentous long object does not get clogged.

The first, second, third, fourth static mixers A, B, C, and D are provided with a slightly wider mixing action chamber and a narrower flow passage alternately inside thereof, so that a liquid, a gas, and a liquid can be obtained. When liquid and liquid are mixed, collision between fluids and compression and expansion (in the case of gas) are repeated alternately, so pressure loss is small and stirring and mixing efficiency is improved, and long filamentous mixture mixed in the fluid Since it is possible to prevent clogging, it is possible to enhance reliability as a static mixer.

Usually, a static mixer is accompanied by pressure loss due to mixing of fluids, so it is necessary to press-in an additive (for example, air) for mixing on the upstream side of the mixer with a compressor or the like. The ejector's air is self-contained, so it does not require a compressor because it is air-pressurized, making it a convenient device for carrying around.

The fluid stirred and mixed by the first, second, third and fourth static mixers A, B, C and D of the present invention is a so-called nano bubble, which is a fluid in which very fine bubbles are mixed. Nanobubbles are ultrafine bubbles generated by stirring, mixing, and separating a liquid and a gas. For example, when the bubble having a general size of microbubbles is 10 μm, the bubble size of the nanobubbles is 200 to 700 nm. It is formed into a size.

In order to confirm the performance of the first, second, third, fourth static mixers A, B, C, D (hereinafter referred to as mixer) of the present invention, carbon dioxide was added to room temperature water in an amount corresponding to the saturation concentration. When a water production test was conducted, 980 ppm was measured during the operation of the present mixer (double type) one-pass (mixer passage time within 0.1 seconds). In this temperature range, the saturated concentration is about 1500 ppm according to Henry's law, but it was proved that good mixing performance was obtained because such an excellent value was obtained without applying pressure for dissolution. Became. For example, when applied to a chemical factory, it has various uses such as wastewater treatment and chemical reaction, and a great energy saving effect can be expected.

In terms of chemical reactions, our in-house conventional mixer required a residence time of 30 to 120 minutes in the chemical reaction tower under conventional reactions, but the reaction can be completed almost instantly, so extra chemicals are added. It does not need to be used, and the great effect of energy saving is achieved in many examples. As a result, almost 30% to 40% of the basic unit of chemicals has been achieved in almost all the actual results, but the mixer of the present invention is comparable in performance to the conventional type, and moreover, pressure loss is higher. Since it is small, combined with the reduction effect of power cost, the future economic effect can be expected dramatically.

Even if it is a mixer that can be used without long objects, it is not worth it if there is a problem with the mixing performance, so the pressure loss measurement data with the mixer of the present invention (tentative name: HFM) and sufficient results already marketed We carried out pressure drop comparison data and performance comparison tests with some in-house mixers (1000 units or more). In the performance test, a comparative test was conducted on the solubility of carbon dioxide in water, and the test results are shown below.

ＨＦＭ１；１段式であって圧損データを示したものである。
ＨＦＭ２：２段式であって圧損データを示したものである。
1) HEM pressure loss measurement data

HFM1 is a one-stage type and shows pressure loss data.
HFM2: Two-stage type, showing pressure loss data.

このテストの結果から、自社従来品のミキサー（ＳＳ．Ｍ１）とその混合性能において
ほぼ同等の結果が出たことが確認できた。
2) CO2 dissolution comparison test using HFM1 and in-house conventional mixer (abbreviated as SS.M1) The carbonated water concentration measuring device used for the test judgment is a simple type carbonated water concentration measuring device commercially available for carbonated spring hot spring facilities ( Product name: Furi Furi) was adopted.

From the results of this test, it was confirmed that the mixing performance of the conventional mixer (SS.M1) was almost the same.

Also, although the structure is a little complicated compared to the conventional method of our company, the pressure loss (ΔP) is kept lower than that of the conventional method of our company, so it is sent to the mixer for users who are performing large flow processing. As a result, the power cost of the pump can be significantly reduced, making it possible to provide an optimal device.

As can be understood from the above-mentioned table, the average pressure of the mixer according to the present invention is reduced by about 20% in comparison with the pressure loss of the conventional mixer of the present invention. As far as the applicant knows, when comparing the pressure loss of the conventional mixer of the commercial product with that of the mixer of the present invention, the mixer of the present invention of the applicant is generally 5 to 20 kPa, while the mixers of other companies are generally around 200 kPa. Is. As described above, if "the pressure loss is low and they are mixed well", the possibility of being adopted not only for the large flow rate processing but also in many fields which have not been the target until now is increased.

1 Main Body Pipe 2 Bottom Plate 3 Inlet Pipe Assembly 4 Connecting Tube 5 Lid Plate 6 Outlet Pipe 7 First Ring 8 First Mixing Action Chamber 9 Second Mixing Action Chamber 10 Third Mixing Action Chamber 11 First Passage 12 Second Passage 14 Annular Convex part 16 1st connecting cylinder 16a Annular convex part 17 2nd connecting cylinder 18 Annular convex part 20 1st mixing action chamber 21 2nd mixing action chamber 22 1st passage 23 2nd passage 25 3rd mixing action chamber 26 3rd passage 27 Fourth Mixing Action Chamber 28 Fourth Passage 30 Outer Cylinder 31 Mounting Port 33 Connecting Cylinder 33a Annular Convex 34 First Passage 35 Second Passage 36 Communication Passage 37 Lower Communication Passage 38 Third Passage 40 First Mixing Action Chamber 41 2 mixing action chamber 45 connecting cylinder 45a annular protrusion 47 annular recess 48 protrusion 49 first passage 50 first mixing action chamber 51 second mixing action chamber 52 second passage 55 long pipe 60 recess 62 spiral inclined plate A 1 Static mixer B 2nd static mixer C 3rd static mixer D 4th static mixer

Claims (6)

A first ring 7 is provided below the main body pipe 1 having a lid plate 5 and a bottom plate 2, an outlet pipe 6 is connected to the upper portion of the main body pipe, and the inlet is inserted through and fixed to the central portion of the lid plate 5. A connecting cylinder 4 having an annular convex portion 14 is attached to the downstream side of the pipe assembly 3, a first passage 11 is provided between the lower portion of the connecting cylinder and the first ring 7, and the inner diameter of the first ring 7 is A second passage 12 is provided between the annular projection 14 and the body pipe 1 which are formed to have substantially the same diameter,
A first mixing action chamber 8 formed between the main body pipe 1, the bottom plate 2 and the first ring 7, and a second mixing action chamber 9 formed between the main body pipe 1 and the annular convex portion 14 The second mixing action chamber 9 communicates with the passage 11, and is provided between the second mixing action chamber 9 and the third mixing action chamber 10 formed by the main pipe 1, the inlet pipe assembly 3, the annular convex portion 14 of the connecting cylinder 4, and the lid plate 5. A static mixer comprising a second passage 12. The first ring 7 and the second ring 7a are attached to the lower inner surface of the main body pipe 1 having the cover plate 5 and the bottom plate 2 with a space therebetween, and the outlet pipe 6 is connected to the upper part of the main body pipe to form the center of the cover plate 5. The first connecting cylinder 16 and the second connecting cylinder 17 are connected to the downstream side of the inlet pipe assembly 3 fixed by being inserted into the portion, and the annular convex portion 16a of the first connecting cylinder 16 and the first ring 7 and the second ring The inner diameter of the ring 7a is formed to be substantially the same,
A second mixing action chamber 20 formed by the main body pipe 1, the bottom plate 2, and the first ring 7, a second ring 7 formed by the first ring 7 attached to the main body pipe 1 and the annular convex portion 18 of the second connecting cylinder 17. A first passage 22 is provided between the mixing action chamber 21 and
The third mixing action chamber 25 formed by the annular convex portion 18 of the second connecting cylinder 17 and the second ring 7a attached to the main body pipe 1, the second ring 7a and the annular convex portion 16a of the first connecting cylinder 16. The third passage 26 is provided between the formed fourth mixing action chamber 27 and
A second passage 23 is provided between the main body pipe 1 and the annular convex portion 18 of the second connecting cylinder 17, and a third passage 26 is provided between the second ring 7a provided in the main body pipe and the first connecting cylinder 16. ,
A static mixer characterized in that a fourth passage 28 is provided between the annular convex portion 16a of the first connecting cylinder 16 and the main body pipe 1. The outlet pipe 6 is connected to the second bottom plate 2b attached to the bottom of the elongated outer cylinder 30 provided on the outer periphery of the main body pipe 1 via the annular passage 36, and the lower passage 37 is provided between the second bottom plate 2a and the bottom plate 2. Is provided, and the connecting cylinder 33 having the annular convex portion 33a is connected to the downstream side of the inlet pipe assembly 3 fixed by being inserted through the central portion of the outer cylinder 30 and the lid plate 5 attached to the upper portion of the main body pipe 1, A first passage 34 is provided between the lower portion of the connecting pipe and the first ring 7 provided in the main body pipe 1, and a second passage 35 is provided between the main body pipe 1 and the annular convex portion 33a of the connecting pipe 33. A static mixer provided with a third passage 38 formed of a plurality of small holes 43 provided on the upper peripheral surface of the main body pipe 1. The outlet pipe 6 is connected above the main body pipe 1 having the cover plate 5 and the bottom plate 2, and is inserted downstream of the inlet pipe assembly 3 fixed in the main body pipe 1 by being inserted into the central portion of the cover plate 5. The connecting cylinder 45 having the annular convex portion 45a is connected, and the annular protruding portion 48 provided on the lower peripheral edge of the annular convex portion 45a of the connecting cylinder and the upper surface of the first ring 7 provided inside the lower portion of the main body pipe 1 are connected to each other. A static mixer characterized in that a narrow first passage 49 and a narrow second passage 52 are provided between the outer periphery of the annular convex portion 45a and the main body pipe 1. A plurality of concavities 60 having concavo-convex surfaces are concentrically provided on the inner bottom surface of the bottom plate 2 attached below the main body pipe 1 so that the fluid flowing out from the lower part of the inlet pipe assembly 3 may pass through the concavities. The static mixer according to any one of claims 1, 2, 3, and 4, wherein On the inner bottom surface of the bottom plate 2 attached below the main body pipe 1, there are provided a plurality of spiral inclined plates 62 each of which has one end flush with the surface of the bottom plate and is inclined from one end to the other end. The static mixer according to claim 1, wherein the static mixer is attached to the static mixer.

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