JP2002361056A - Fluid mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid mixer which is capable of efficiently mixing two kinds of fluids. SOLUTION: The first fluid is supplied from a first introducing pipe 3 connected in the tangent direction in the outer peripheral part of a first flow pipe 1, by which the swirling flow of the first fluid is generated in the first flow pipe 1 and on the other and, the second fluid is supplied from a second introducing pipe 4 connected in the tangent direction in the outer peripheral part of the second flow pipe 2, by which the swirling flow of the second fluid is generated in the second flow pipe 2. The first fluid and the second fluid progressing while respectively swirling collide against each other at a mixing point M, by which the fluids are mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid mixer, and more particularly, to a fluid mixer for uniformly mixing two kinds of fluids.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. 9-287883 discloses that a mixing gas in which a mainstream gas flows is jetted with a downstream gas from a tangential direction of an outer peripheral portion thereof to generate a swirling flow in the mixing tank.
A mixer for mixing a mainstream gas and a downstream gas by the swirling flow is disclosed. According to this mixer, a secondary flow is formed as a secondary flow by ejecting the subordinate gas to the mainstream gas, and this swirl flow is used. It becomes possible to mix efficiently.

[0003]

However, the mixing efficiency is not yet satisfactory only by utilizing the secondary flow formed by the ejection of the following gas, and it is not sufficient if a long distance and time are not required. Could not be mixed. Japanese Patent Application Laid-Open No. 10-339396 discloses a device for supplying a mixing fluid to a main fluid and then mixing the main fluid by swirling them. However, even in this device, it is necessary to mix sufficiently. However, there is a problem that it takes a long distance and time after turning.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a fluid mixer which can efficiently mix two kinds of fluids.

[0005]

A fluid mixer according to the present invention comprises: a first flow pipe for guiding a first fluid to a mixing point; a second flow pipe for guiding a second fluid to a mixing point; A first flow path provided in the first flow pipe and generating a swirling flow in the first fluid;
Swirl flow generating means, and a second flow pipe
And a second swirling flow generating means for generating a swirling flow in the first fluid and the first fluid and the second fluid, each of which generates a swirling flow, are mixed at a mixing point.

[0006] The first and second swirling flow generating means include first and second inlet pipes for supplying the first and second fluids from the eccentric direction to the first and second flow pipes, respectively. A propeller fixedly arranged in the first and second flow pipes,
A deflecting plate fixedly disposed in the first and second flow pipes, a torsion plate fixedly disposed in the first and second flow pipes, respectively, a deflection aperture fixedly disposed in the first and second flow pipes, respectively It can be constituted by any of a plate and a corrugated pipe portion provided in each of the first and second flow pipes. Further, the first and second flow pipes can be connected so as to cross each other at a predetermined angle at the mixing point, or to face in the same direction, or to face in opposite directions.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Embodiment 1 FIG. FIG. 1A shows a fluid mixer according to Embodiment 1 of the present invention. The first flow pipe 1 and the second flow pipe 2 are connected at right angles to each other. As shown in FIG. 1B, a first introduction pipe 3 for supplying a first fluid from the eccentric direction is connected to the first flow pipe 1. Similarly, as shown in FIG. 1C, a second introduction pipe 4 for supplying the second fluid from the eccentric direction is connected to the second flow pipe 2.

Next, the operation of the first embodiment will be described. The first fluid is supplied to the first circulation pipe 1 via the first introduction pipe 3 and the second fluid is supplied to the second introduction pipe 4.
Is supplied to the second distribution pipe 2 via the At this time, FIG.
As shown in (b), since the first introduction pipe 3 is connected in the tangential direction of the outer peripheral part of the first flow pipe 1, the swirling flow of the first fluid in the first flow pipe 1 is generated. appear. Similarly, as shown in FIG. 1C, since the second introduction pipe 4 is connected to the outer peripheral portion of the second flow pipe 2 in a tangential direction, the second introduction pipe 4 is formed inside the second flow pipe 2. A swirling flow of fluid is generated. In this way, the first fluid and the second fluid, which have each proceeded while turning, collide at the mixing point M and are mixed.

In general, it is known that there is a relationship as shown in FIG. 2 between the wave number and the energy density of a vortex in a turbulent flow. That is, in a region where the energy density is large, the wave number of the vortex is small (the diameter of the vortex is large), and as the energy density becomes small, the wave number of the vortex becomes large (the diameter of the vortex becomes small) and finally dissipates as thermal energy. Would.

Here, a fluid having a concentration C1 is supplied to the first flow pipe 1 and a fluid having a concentration C2 lower than the concentration C1 is supplied to the second flow pipe 2 so that these fluids collide at a mixing point M. When the concentration of the mixed fluid corresponding to the distance from the mixing point M is measured, a result as shown in FIG. 3 is obtained. A curve S1 indicates a case where a fluid having a large initial energy density before mixing is used, and a curve S2 indicates a case where a fluid having a small initial energy density is used. The distance from the mixing point M until the concentration of the mixed fluid reaches a predetermined value C lower than the concentration C1 and higher than the concentration C2 is L1 in the case of a fluid having a high initial energy density, whereas the distance from the initial energy density is L1. In the case of a small fluid, L2 (> L1), and it can be seen that a fluid having a large initial energy density can be mixed at a shorter distance.

According to the present invention, the first fluid and the second fluid collide at the mixing point M while rotating, that is, in a state where the initial energy density is large, so that the mixing can be performed efficiently at a short distance.

Embodiment 2 FIG. FIG. 4A shows the second embodiment.
1 shows a fluid mixer according to the present invention. This fluid mixer is different from the fluid mixer of the first embodiment shown in FIG.
Instead of the introduction pipes 3 and 4, propellers 5 and 6 as shown in FIGS. 4B and 4C are fixedly arranged inside the first and second flow pipes 1 and 2, respectively. Propellers 5 and 6 each have deflected wings,
By passing through these propellers 5 and 6, swirling flows of the first and second fluids are generated, respectively. As a result, as in the first embodiment, it is possible to mix efficiently over a short distance.

Embodiment 3 FIG. 5A shows the third embodiment.
1 shows a fluid mixer according to the present invention. This fluid mixer is different from the fluid mixer of the first embodiment shown in FIG.
5 (b) and 5 (c) are fixedly disposed inside the first and second flow pipes 1 and 2, respectively, instead of the introduction pipes 3 and 4. . The deflecting plates 7 and 8 are each formed of a fan-shaped, rectangular, or triangular plate attached to be deflected with respect to the flow of the fluid,
By passing through these deflecting plates 7 and 8, swirling flows of the first and second fluids are generated, respectively. as a result,
As in the first embodiment, it is possible to mix efficiently over a short distance.

Embodiment 4 FIG. 6A shows a fourth embodiment.
1 shows a fluid mixer according to the present invention. This fluid mixer is different from the fluid mixer of the first embodiment shown in FIG.
As shown in FIGS. 6B and 6C, the twisted plates 9 and 10 are fixedly disposed inside the first and second flow pipes 1 and 2, respectively, instead of the introduction pipes 3 and 4 of FIG. It is. The torsion plates 9 and 10 are formed by twisting flat plates, respectively, and by passing through these torsion plates 9 and 10, swirling flows of the first and second fluids are generated, respectively. As a result, as in the first embodiment, it is possible to mix efficiently over a short distance.

Embodiment 5 FIG. 7A shows a fifth embodiment.
1 shows a fluid mixer according to the present invention. This fluid mixer is different from the fluid mixer of the first embodiment shown in FIG.
7 (b) and 7 (c) are fixedly disposed inside the first and second flow pipes 1 and 2, respectively, instead of the introduction pipes 3 and 4. is there. The deflecting perforated plates 11 and 12 are formed by forming a large number of flow holes 13 and 14 diagonally in a thick plate, respectively. And a swirling flow of the second fluid is generated. As a result, as in the first embodiment, it is possible to mix efficiently over a short distance.

Embodiment 6 FIG. 8 shows a fluid mixer according to the sixth embodiment. This fluid mixer is different from the fluid mixer of the first embodiment shown in FIG. 1 in that corrugated pipes are respectively provided in first and second flow pipes 1 and 2 instead of the first and second introduction pipes 3 and 4. Parts 15 and 16 are provided. The corrugated pipe sections 15 and 16 are each twisted in the pipe, and when passing through these corrugated pipe sections 15 and 16, swirling flows of the first and second fluids are generated, respectively. As a result, as in the first embodiment, it is possible to mix efficiently over a short distance.

Embodiment 7 In the first to sixth embodiments, the first flow pipe 1 and the second flow pipe 2 are connected at right angles to each other, but as shown in FIG.
The flow of the fluid in the flow pipe 17 of the second flow pipe 18
Of the first flow pipe 17 so that the tip 19 of the
And the second flow pipe 18 may be connected. Also in this case, the first fluid that has advanced while circling in the first circulation pipe 17 and the second fluid that has circulated in the second circulation pipe 18 have advanced.
And collide with each other at the mixing point.

Embodiment 8 In the first to sixth embodiments, the first flow pipe 1 and the second flow pipe 2 are connected to each other at a right angle. However, as shown in FIG. Flow pipe 1 for the fluid flow of
8 so that the tip 19 of the first flow pipe 8 faces in the opposite direction.
7 and the second distribution pipe 18 may be connected. Also in this case, the first fluid that has advanced while circling in the first circulation pipe 17 and the second fluid that has circulated in the second circulation pipe 18 have advanced.
And collide with each other at the mixing point.

Further, the first distribution pipe and the second distribution pipe are
They may be connected so that they do not cross at right angles, in the same direction or in opposite directions, but intersect each other at a predetermined angle of acute or obtuse.

[0020]

As described above, according to the present invention, a swirling flow is generated in the first fluid by the first swirling flow generating means provided in the first flowing pipe, and the second flowing pipe is formed. The second swirling flow generating means provided in the first step generates a swirling flow in the second fluid, and in this state, the first fluid and the second fluid are mixed at the mixing point. It becomes possible to mix efficiently in time.

[Brief description of the drawings]

1A and 1B show a fluid mixer according to Embodiment 1 of the present invention, wherein FIG. 1A is a side sectional view, FIG. 1B is a front sectional view of a first circulation pipe, and FIG. 1C is a second circulation pipe. FIG.

FIG. 2 is a graph showing the relationship between the energy density and the wave number of a vortex in a turbulent flow.

FIG. 3 is a graph showing a relationship of a concentration of a mixed fluid corresponding to a distance from a mixing point.

FIG. 4 shows a fluid mixer according to a second embodiment,
(A) is a side sectional view, (b) is a front sectional view of a first circulation pipe, and (c) is a front sectional view of a second circulation pipe.

FIG. 5 shows a fluid mixer according to a third embodiment,
(A) is a side sectional view, (b) is a front sectional view of a first circulation pipe, and (c) is a front sectional view of a second circulation pipe.

FIG. 6 shows a fluid mixer according to a fourth embodiment,
(A) is a side sectional view, (b) is a front sectional view of a first circulation pipe, and (c) is a front sectional view of a second circulation pipe.

FIG. 7 shows a fluid mixer according to a fifth embodiment,
(A) is a side sectional view, (b) is a front sectional view of a first circulation pipe, and (c) is a front sectional view of a second circulation pipe.

FIG. 8 is a side view showing a fluid mixer according to a sixth embodiment.

FIG. 9 is a side sectional view showing a main part of a fluid mixer according to a seventh embodiment.

FIG. 10 is a side sectional view showing a main part of a fluid mixer according to an eighth embodiment.

[Explanation of symbols]

1,17 1st distribution pipe, 2,18 2nd distribution pipe, 3
A first inlet pipe, a fourth inlet pipe, a 5,6 propeller,
7,8 deflection plate, 9,10 twist plate, 11,12 deflection perforated plate, 13,14 flow hole, 15,16 corrugated tube part, 19 tip part.

Claims (10)

[Claims] 1. A fluid mixer for mixing a first fluid and a second fluid at a mixing point, wherein the first fluid pipe guides the first fluid to the mixing point, and the second fluid guides the second fluid to the mixing point. A second flow pipe, first swirl flow generating means provided in the first flow pipe and generating a swirl flow in the first fluid, and a swirl flow provided in the second flow pipe and swirl into the second fluid And a second swirling flow generating means for generating a flow, wherein the first fluid and the second fluid each having generated the swirling flow are mixed at a mixing point. 2. The first and second swirling flow generating means are provided in the first and second flow pipes from the first and second eccentric directions, respectively.
The fluid mixer according to claim 1, comprising first and second inlet pipes for supplying the fluid. 3. The fluid mixer according to claim 1, wherein the first and second swirling flow generating means comprise propellers fixedly disposed in the first and second flow pipes, respectively. 4. The fluid mixer according to claim 1, wherein the first and second swirling flow generating means comprise a deflecting plate fixedly disposed in the first and second flow pipes, respectively. 5. The fluid mixer according to claim 1, wherein the first and second swirling flow generating means comprise a twisted plate fixedly disposed in the first and second flow pipes, respectively. 6. The fluid mixer according to claim 1, wherein the first and second swirling flow generating means comprise a deflection perforated plate fixedly disposed in the first and second flow pipes, respectively. 7. The fluid mixer according to claim 1, wherein the first and second swirling flow generating means include corrugated pipes provided in the first and second flow pipes, respectively. 8. The fluid mixer according to claim 1, wherein the first and second flow pipes are connected so as to cross each other at a predetermined angle at a mixing point. 9. The first and second flow pipes are connected so as to face in the same direction at a mixing point.
A fluid mixer according to any one of the preceding claims. 10. The first and second flow pipes are connected so as to face in opposite directions at the mixing point.
A fluid mixer according to any one of the preceding claims.