JP3609344B2 - Mixing element of static mixer - Google Patents

Description

Technical field
The present invention relates to a mixing element body of a static mixer.
Background art
Conventionally, as shown in FIGS. 21 to 24, a static mixer that mixes a plurality of fluids in-line has a plurality of mixing elements in a cylindrical casing A that is a flow channel structure constituting a fluid flow channel. The mixing element B is composed of two large and small discs C, D, and the large-diameter disc C has a hexagonal cylindrical shape of the same shape and size around the central flow hole E ( Although not shown in the drawings, a small chamber row group G in which small chambers F of a square tube, an octagon tube, a triangular tube, a round tube shape, etc. are arranged is provided, and further, a small chamber row group having a smaller diameter in the diameter (outer) direction. Around the small chamber F of G, a large-diameter small chamber row group G in which small chambers F of the same shape and size are arranged is formed in a honeycomb shape (closest density) as a whole.
The small-diameter disk D is overlapped with the large-diameter disk C, and the small-diameter disk D is also formed with a hexagonal cylindrical chamber F having the same shape and size in a honeycomb shape. The small chamber F of the large disc D and the small chamber F of the large-diameter disc C are arranged at different positions so that the small chambers F facing each other communicate with each other, that is, the other small chamber F is formed at the center of the small chamber F. It arranges so that the cross connection part P of the side wall H to be located may be located.
In addition, the plurality of mixing elements B in the casing A have the same shape of the discs C and D overlapped back to back, the outer periphery of the large-diameter disc C and the inner periphery of the casing A are sealed, and the small-diameter circle A flow passage M is formed between the outer periphery of the plate D and the inner periphery of the casing A, and the flow hole E communicates with the other flow holes E, the inlet J, and the outlet K.
Next, as a mixing mechanism, when a fluid is caused to flow into the casing A from the inlet J, the small chambers F that reach the inside through the flow holes E of the large-diameter disk C of the upstream mixing element B and communicate with each other are formed. The fluid that passes through and flows radially outward from the center and reaches the inner peripheral side of the casing A enters the small chambers F from the outside of the mixing element B on the downstream side through the flow passage M, and passes through the small chambers F that communicate with each other. Passing through and flowing from the outside to the center while gathering in a centripetal manner, entering the mixing element B on the downstream side again from the flow hole E, and flowing in the plurality of mixing elements B sequentially while passing through each small chamber again And flows out from the exit K.
However, the conventional static mixer has the following problems regardless of the shape of the chamber F (hexagonal cylinder, square cylinder, octagonal cylinder, triangular cylinder, round cylinder, etc.).
That is, the small chambers F having the same shape and the same size are arranged in a honeycomb shape, and the number of the small chambers F increases as it moves to the outside, so that when the fluid enters from the flow hole E of the mixing element B on the upstream side, In the mixing element B, the fluid is dispersed while being diffused, but in the downstream mixing element B arranged next, the number of the small chambers F decreases as the center moves to the center. Flows from the outside and gathers from a plurality of chambers F to one chamber F toward the center, so that the coalescence phenomenon of dispersed particles occurs inside the mixing element B, and the dispersed particles become finer. I can not expect.
Further, the dispersed state from the facing small chamber F to the other small chambers F is not uniformly dispersed. That is, regardless of the flow direction (radial or centripetal direction), even in the case of the illustrated hexagonal cylindrical chamber F, the chamber group G includes one chamber having a dispersion number of 2 and one chamber having a dispersion number of 1 that does not contribute to dispersion. In addition, the number of the small chambers F increases in the small chamber row group G sequentially arranged on the outside, and the outer dispersion region (circumferential direction) inside the mixing element B and the center side thereof are combined. There is a difference in the number of dispersions in the dispersion region (circumferential direction), which results in non-uniform dispersion mixing.
In order to increase the total number of dispersions (hereinafter referred to as the total number of dispersions) when the fluid flows into and out of the mixing element B, the small chambers F are arranged in a close-packed manner. Other than increasing the row group G, it is not possible to cope with it, so that the mixing element B is enlarged.
Disclosure of the invention
The present invention is a two-layer structure composed of a primary mixing element part and a secondary mixing element part in view of problems such as coalescence of dispersed particles based on the above prior art, non-uniform dispersion mixing, and increase in size due to an increase in the total number of dispersions. The mixing element body forms a complex flow channel that communicates from the inside (or outside) to the outside (or inside) inside, and this flow channel flows in one direction (from outside to inside) and in the other direction. The number of dispersion during flow (from inside to outside) is the same, and the dispersion state from the primary mixing chamber group (or secondary mixing chamber group) to the secondary mixing chamber group (or primary mixing chamber group) is the dispersion By making uniform in the whole area (circumferential direction), it is possible to make the dispersed particles finer and uniformly disperse and mix, and the increase or decrease in the total number of dispersions is the primary that divides the primary mixing chamber (or secondary mixing chamber). Corresponding to the increase or decrease of the ward dividing wall (or secondary ward dividing wall) That it has to eliminate provide mixing elements of a static mixer to subject matter to solve such problems described above.
The mixing element body of the static mixer is provided in a fluid flow path, and is composed of a two-layer structure of a primary mixing element part and a secondary mixing element part. An entrance / exit is formed, and at the boundary surface of the two-layer structure around the primary entrance / exit, mixing chambers communicating therewith are arranged circumferentially, and these circumferential mixing chamber groups are arranged concentrically. The two mixing chambers are configured to communicate with each other through a step which applies a shearing force between the mixing chambers in the radial positional relationship of the mixing chamber group.
Furthermore, it consists of a two-layer structure of a primary mixing element part and a secondary mixing element part, the primary mixing element part is provided with a primary inlet / outlet, a primary mixing chamber group, and the primary inlet / outlet is formed in the primary plate part, In addition, the primary mixing chamber group is formed with an annular primary groove portion on the boundary surface of the two-layer structure around the primary entrance in the primary plate portion, and a plurality of primary partition walls are radially formed in the primary groove portion. It consists of a primary mixing chamber divided by.
In addition, the secondary mixing element part is provided with a secondary mixing chamber group, and the secondary mixing chamber group forms an annular secondary groove part on the boundary surface of the secondary layer of the secondary plate part. The secondary partition wall is the same as the primary partition wall, and is composed of secondary mixing chambers divided by the secondary partition wall.
The secondary mixing chamber and the primary mixing chamber partially overlap in the diametrical direction, and the primary inlet / outlet communicates with either the primary mixing chamber or the secondary mixing chamber, and the other primary mixing chamber or the secondary mixing chamber. The mixing chamber is open to the outside and serves as a secondary entrance.
In addition, the primary mixing chamber group and the secondary mixing chamber group of the secondary mixing element unit are formed in multiple layers, or the primary partition wall of the primary mixing element unit and the secondary mixing element unit The dividing wall is provided with the position in the circumferential direction matched, and the primary dividing wall and the secondary mixing element part in the primary mixing element part are alternately provided at substantially equal intervals in the circumferential direction.
Moreover, a through-hole is formed on the outer peripheral side of either the primary plate portion of the primary mixing element portion or the secondary plate portion of the secondary mixing element portion, and the primary mixing chamber or the secondary mixing chamber is set to the outside. The secondary entrance is formed by communicating with the through-hole without being opened, and a plurality of radial partition walls are formed at the through-hole to form the secondary entrance.
Moreover, each mixing chamber formed in the said primary mixing element part and the secondary mixing element part is formed as an independent recessed part in the double-layer structure boundary surface of both board parts, respectively.
Furthermore, the mixing element body of the static mixer is provided in the fluid flow path, and is composed of a two-layer structure of a primary mixing element section and a secondary mixing element section. A cup-shaped casing that forms a primary inlet / outlet and a flow path between the other secondary mixing element part, and is mixed around the collision surface of the secondary element part facing the primary inlet / outlet. The chambers are formed in a circumferential arrangement, the circumferential mixing chamber groups are concentrically arranged, and a shearing force is applied between the mixing chambers in the radial positional relationship of the mixing chamber groups. A mixing element body of a static mixer characterized in that two mixing chambers communicate with each other through a step, and the outer peripheral side of the mixing chamber is formed as an inclined surface between the mixing chambers. Or the above secondary mixing is required. The mixing chamber group of each row formed circumferentially parts as stepped, obtained by forming the step.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a mixing element body of a static mixer according to the present invention, FIG. 2 is a plan view showing a primary mixing element portion constituting the mixing element body, and FIG. 3 is a perspective view thereof. FIG.
FIG. 4 is a plan view showing a secondary mixing element portion constituting the mixing element body, and FIG. 5 is a perspective view thereof.
FIG. 6 is a view showing the communication relationship between the primary mixing chamber and the secondary mixing chamber, and FIG. 7 shows another embodiment of the same communication state.
FIGS. 8, 9, 10 and 11 are sectional views showing other embodiments of the mixing element body.
FIG. 12 is a cross-sectional view showing a static mixer in which the mixing element body is provided in the flow channel structure, and FIG. 13 is a cross-sectional view showing another embodiment of the static mixer. .
FIG. 14 is a schematic view showing a mixing process of the mixing element body of the present invention.
15 (A) and 15 (B) are plan views showing other embodiments of the present invention.
FIG. 16 is a schematic view showing a modification of the mixing process of the mixing element body of the present invention.
17 (A) and 17 (B) are perspective views showing another embodiment of the present invention based on the schematic diagram of FIG.
FIGS. 18 (A) and 18 (B) are other embodiments of the present invention shown in the schematic diagram of FIG. 16 and show a mixer in which a step is formed with an inclined surface between concentric mixing chamber groups. It is a perspective view.
FIGS. 19 (A) and 19 (B) show another embodiment of the present invention shown in the schematic diagram of FIG. 16 as a step-shaped section between concentric mixing chamber groups. It is a perspective view which shows the mixer which gave the dispersion | distribution effect | action.
FIG. 20 is a perspective view showing another embodiment of the combination of the step between the step-like mixing chamber and the dividing wall of the present invention shown in the schematic diagram of FIG.
FIG. 21 is a cross-sectional view showing the internal structure of a conventional static mixer, and FIGS. 22 and 23 show a large-diameter disk and a small-diameter disk constituting the mixing element of the static mixer. FIG. 24 is a front view, and FIG. 24 is a view showing a communication state of the small chambers of the mixing element of the static mixer.
BEST MODE FOR CARRYING OUT THE INVENTION
The mixing element 1 of the static mixer according to the present invention is a kind of in-line mixer used for mixing various fluids such as gas and liquid (liquid / liquid, gas / liquid, gas / gas, solid / liquid, etc.), An invention of a structure of a static mixer having no mechanical movable part, and the inventions of claims 1 to 8 are sequentially based on FIGS. 1 to 15 and claims 9 to 12 of the invention. The described invention will be described with reference to FIGS.
The mixing element body 1 has a two-layer structure of a primary mixing element part 2 and a secondary mixing element part 3, and when the primary mixing element part 2 and the secondary mixing element part 3 are formed as separate bodies, the 2 The former primary mixing element portion 2 has a primary entrance 5 penetrating through the central side of the disc-shaped primary plate portion 4, and an overlapping surface around the primary entrance 5. An annular primary groove 6 having a predetermined inner and outer diameter and depth is formed on the boundary surface 4a, and a plurality of primary partition walls 7 are radially formed in the primary groove 6, and this primary partition Two or more primary mixing chambers 8 are divided in the circumferential direction by walls 7, and a primary mixing chamber group 9 including the primary mixing chambers 8 is provided.
Further, the latter secondary mixing element portion 3 includes an annular secondary groove portion 11 having a predetermined inner and outer diameter and depth on a two-layer structure boundary surface 10a that is an overlapping surface of the disk-shaped secondary plate portion 10. A plurality of secondary partition walls 12 are formed radially in the groove 11, and the secondary partition walls 12 surround two or more secondary mixing chambers 13 that should have the same number as the primary mixing chamber 8. A secondary mixing chamber group 14 composed of the secondary mixing chambers 13 is provided which is divided in the direction.
Further, the primary mixing chamber 8 and the secondary mixing chamber 13 are formed in the primary groove 6 and the secondary groove 11 by the primary partition wall 7 and the secondary partition wall 12 in order to uniformly disperse the fluid in the radial and centripetal directions. , Each of them is divided almost uniformly.
Moreover, the shape of the primary plate part 4 and the secondary plate part 10 is not limited to a disk shape, and the primary mixing chamber group 9 and the secondary mixing chamber group 14 are formed on the two-layer structure boundary surface 4a and the two-layer structure boundary surface 10a. Can be formed into a polygonal plate shape having a triangular shape or more, for example, and the primary groove portion 6 and the secondary groove portion 11 are not limited to a circular shape in a plan view, and the primary groove portion 6 If the primary mixing chamber 8 and the secondary mixing chamber 13 having a substantially uniform size can be formed in the secondary groove 11 by the primary partition wall 7 and the secondary partition wall 12, respectively, for example, a plan view of a triangle or more It may be polygonal.
The secondary mixing chamber 13 of the secondary mixing element part 3 and the primary mixing chamber 8 of the primary mixing element part 2 are in a state where the two-layer structure boundary surface 4a and the two-layer structure boundary surface 10a are concentrically overlapped, A part of them overlaps in the diametrical direction, that is, the primary mixing chamber group 9 of the primary mixing element part 2 and the secondary mixing chamber group 14 of the secondary mixing element part 3 have a primary groove part 6 and a secondary groove part 11 respectively. Of the primary mixing chamber group 9 and the secondary mixing chamber group 14 by overlapping the inner and outer sides of the primary groove portion 6 and the secondary groove portion 11 in the diametrical direction. The next mixing chamber 13 is communicated.
Regarding the communication state, the primary partition wall 7 of the primary mixing chamber group 9 and the secondary partition wall 12 of the secondary mixing chamber group 14 are displaced by a predetermined angle so that the positions in the circumferential direction are alternated. Preferably, in order to uniformly disperse the fluid in the radial and centripetal directions, the primary partition walls 7 and the secondary partition walls 12 are provided alternately at substantially equal intervals in the circumferential direction, and the primary mixing chamber 8 and the secondary mixing chamber 13 are provided. The primary partition wall 7 and the secondary partition wall 12 are positioned approximately in the center of each, and one primary mixing chamber 8 or secondary mixing chamber 13 and two secondary mixing chambers 13 or primary mixing chambers 8 are provided. Communicate.
In addition, the primary partition wall 7 of the primary mixing chamber group 9 and the secondary partition wall 12 of the secondary mixing chamber group 14 are provided so as to coincide with each other in the circumferential direction. , One secondary mixing chamber 13 communicates.
Further, the number of the primary mixing chamber group 9 of the primary mixing element part 2 and the secondary mixing chamber group 14 of the secondary mixing element part 3 may be formed as a single (single), and further increase the dispersion repeatedly, In order to increase the total number of dispersions and increase the mixing efficiency, the primary mixing chamber group 9 and the secondary mixing chamber group 14 may be formed concentrically (multiple).
Further, the primary inlet / outlet 5 communicates with the primary mixing chamber group 9 of the primary mixing element unit 2 or the secondary mixing chamber group 14 of the secondary mixing element unit 3 which is formed at the outermost side, and also performs primary mixing. Of the primary mixing chamber group of the element part 2 or the secondary mixing chamber group 14 of the secondary mixing element part 3, the outermost one formed outside is opened to the outside to form a secondary inlet / outlet 15 (eighth). , See FIG. 9).
The primary mixing chamber group 9 or the secondary mixing chamber group 14 is configured so as to communicate with the primary inlet / outlet 5 and the secondary inlet / outlet 15 respectively, so that the groove-shaped primary groove 6 and the secondary groove 11 are the outer wall and the inner wall. Each is formed without being formed.
Further, as another embodiment of the secondary inlet / outlet 15, the primary plate portion 4 or the secondary plate of the primary mixing element portion 2 corresponding to the primary mixing chamber group 9 or the secondary mixing chamber group 14 formed on the outermost side. A through-hole 16 is provided around the secondary plate portion 10 on the outer peripheral side of the mixing element portion 3 to form a secondary entrance 15. Further, a plurality of partition walls 17 can be radially formed in the through-hole 16 (see FIGS. 10 and 11).
Moreover, although the primary mixing element part 2 and the secondary mixing element part 3 were demonstrated based on what was formed based on the disk-shaped primary plate part 4 and the secondary plate part 10 which were formed separately, There is no limitation to such a form, and a divided body (not shown) that is divided into at least two bodies at appropriate locations in the thickness direction and the circumferential direction of these members can be joined together by bonding, welding means, or the like. In this case, the two-layer structure boundary surface 4a and the two-layer structure boundary surface 10a are assumed to be virtual surfaces. Even if it does, what is necessary is just to provide each above-mentioned form as a last form.
Next, there are various usage forms of the mixing element body 1, and the mixing element body 1 has either the primary inlet / outlet 5 or the secondary inlet / outlet 15 as the fluid inflow side and the other as the fluid outflow side. When the unit is connected to a pipe (not shown) through which a fluid flows and used as a static mixer, or in the mixing element body 1 as shown in FIGS. 1 and 10, the primary inlet / outlet 5 and the secondary inlet / outlet 15 are coaxial. If the fluid inflow and outflow directions are also in the same direction, a plurality of mixing element bodies 1 can be connected and used. In this case, between the front and rear mixing element bodies The primary entrance 5 or the secondary entrance 15 is made to communicate with each other.
Further, as a fluid mixer, a sealing device 18 is provided at a necessary place in order to prevent leakage of the fluid from an unnecessary place depending on the nature and characteristics of the fluid to be mixed, the degree of mixing, the mixing application, the purpose and the like. What is necessary is just to provide, for example, the part of the "black circle" mark on drawing can be illustrated.
Another use form of the mixing element body 1 is a case where the mixing element body 1 is provided in a flow path structure 19 corresponding to a pipe and used as a static mixer. Is composed of a cylindrical cylindrical body 20 and a lid body 21 that seals the openings at both ends of the cylindrical body 20, and the lid body 21 has a fluid inlet 22 and an outlet 23 formed in the center of each. It is detachably mounted through a sealing device 18a that prevents fluid leakage.
And as the arrangement | positioning form of the mixing element body 1 in the flow-path structure 19, as shown in FIG. 12, while making the primary entrance / exit 5 or the secondary entrance / exit 15 communicate with each other, the primary entrance / exit 5 is made into the entrance 22, the exit 23 to communicate.
Further, as shown in FIG. 13, the other use form is to mix the primary inlet / outlet 5 of the downstream mixing element body 1 with the secondary inlet / outlet 15 of the upstream mixing element body 1. A ring-shaped spacer 24 is interposed between the primary inlet 5 and the secondary inlet 15 and the inlet 22 and outlet 23 are communicated with each other.
Although not shown in the figure, when the mixing element body 1 shown in FIGS. 8 and 9 is disposed in the flow path structure 19, it flows out of or flows in from the secondary outlet 15. The outer diameter of the mixing element body 1 is set so that the flow path M shown in the conventional static mixer is formed on the inner peripheral side of the cylindrical body 20 of the path structure 19. For example, the mixing element body 1 When the primary mixing element part 2 or the secondary mixing element part 3 are stacked back to back, the flow path M is formed on the outer peripheral side of the secondary mixing element part 3 and the inner peripheral side of the cylindrical body 20 in the mixing element body 1. What is necessary is just to form.
Next, the operation of the mixing element body of the present invention will be described. First, the mixing element body 1 can have either the primary inlet / outlet 5 or the secondary inlet / outlet 15 as the fluid inflow side and the other as the outflow side. The fluid to be dispersed and mixed is dispersed and mixed in the process of flowing through a complicated flow path formed by the primary mixing chamber group 9 and the secondary mixing chamber group 14 of the mixing element body 1.
First, as shown in FIGS. 1 and 6, in the mixing element body 1 in a form in which one primary mixing chamber 8 or secondary mixing chamber 13 and two secondary mixing chambers 13 or primary mixing chamber 8 communicate with each other. When the inflow side is the primary inlet / outlet 5, the fluid is dispersedly entered into a plurality of (12 in the drawing) secondary mixing chambers 13 communicating with the primary inlet / outlet 5 first, and then the secondary mixing chamber 13. The course is changed by the outer wall of the secondary groove portion 11 and flows into the two primary mixing chambers 8 arranged so as to communicate with the secondary mixing chamber 13, The course is changed at the outer wall of the primary groove portion 6 of the primary mixing chamber 8, and the two are mixed in the two secondary mixing chambers 13 that are arranged so as to communicate with the primary mixing chamber 8. This secondary distribution is repeated in order and finally opened to the outside. 15 distributed mixture treated fluid flows out in the inflow direction and the direction from.
In addition, since the secondary inlet / outlet 15 has a configuration in which the partition wall 17 is formed in the through-hole 16, the numerical aperture partitioned by the partition wall 17 is also obtained when the secondary inlet / outlet 15 finally flows into the secondary inlet / outlet 15 from the primary mixing chamber 8. Depending on the distribution.
Next, contrary to the above, in the case where the inflow side is the secondary inlet / outlet 15, the flow direction is only reversed, and the total number of dispersions is not affected by the flow direction and does not change. The same dispersion and mixing action is the same.
Next, the mixing element body 1 of another embodiment shown in FIG. 11 is basically the same as the above, except that the first inflow chamber is replaced with the primary mixing chamber 8, The outflow direction is reversed with respect to the inflow direction.
Next, in the mixing element body 1 having a form in which one primary mixing chamber 8 and one secondary mixing chamber 13 are communicated with each other as shown in FIG. The plurality of (12 in the figure) secondary mixing chambers 13 communicating with the entrance / exit 5 at first are dispersed and entered, and then the course is changed at the outer wall of the secondary groove 11 of the secondary mixing chamber 13. Then, it flows into one primary mixing chamber 8 disposed so as to be in communication with the secondary mixing chamber 13, and the course is changed at the outer wall of the primary groove 6 of the primary mixing chamber 8. At the same time, it enters one secondary mixing chamber 13 which is disposed so as to communicate with the primary mixing chamber 8, and this flow is repeated in succession and finally opened to the outside. The fluid that has been dispersed and mixed from 15 is discharged in the same direction as the inflow direction.
Next, contrary to the above, the case where the inflow side is the secondary inlet / outlet 15 is basically the same as the above except that the flow direction is reversed. In addition, the primary mixing element part 2 and the secondary mixing element part 3 are configured separately, and the mixing element body 1 that is concentrically overlapped is divided into the primary partition wall 7 of the primary mixing chamber group 9 and secondary mixing. The positions of the secondary partition walls 12 of the chamber group 14 can be alternated or matched in the circumferential direction, so that the total number of dispersions can be changed even for the same mixed element body 1. Become.
As described above, the present invention comprises a two-layer structure of the primary mixing element part 2 and the secondary mixing element part 3, and the primary mixing element part 2 forms the primary inlet / outlet 5 in the primary plate part 4, and the primary inlet / outlet is formed. 5 is formed on the boundary surface 4a of the two-layer structure around 5 and primary mixing walls are formed in the primary groove section 6 by radially forming a plurality of primary partition walls 7 and dividing by the primary partition walls 7. A primary mixing chamber group 9 consisting of chambers 8 is provided, and the secondary mixing element portion 3 is formed with an annular secondary groove portion 11 on the two-layer structure boundary surface 10a of the secondary plate portion 10, and is formed in the secondary groove portion 11. Is provided with a secondary mixing chamber group 14 composed of secondary mixing chambers 13 which are formed radially with the same number of secondary dividing walls 12 as the primary dividing walls 7 and divided by the secondary dividing walls 12. The mixing chamber 13 and the primary mixing chamber 8 partially overlap in the diametrical direction, and the primary inlet / outlet 5 is the primary mixing chamber 8 or secondary mixing. Since the other primary mixing chamber 8 or the secondary mixing chamber 13 is opened to the outside and becomes the secondary inlet / outlet 15, even if the fluid flows in the radial or centripetal direction, the primary mixing chamber The number of the primary mixing chamber 8 of the chamber group 9 and the secondary mixing chamber 13 of the secondary mixing chamber group 14 does not change between the inner side and the outer side in the diametrical direction. Since the flow and flow in the same state as when flowing, that is, the dispersion and mixing action with the same number of dispersions can be obtained regardless of the flow direction, the coalescence phenomenon caused by the collective flow that has occurred in conventional mixers can be eliminated. In addition, the fineness of the dispersed particles is not impaired, and also in the entire dispersion region (circumferential direction) from the primary mixing chamber group 9 to the secondary mixing chamber group 14, there are chambers having different dispersion numbers as in a conventional mixer. The number of variances Differences can heterogeneous dispersion mixing prevention by mixing ability is remarkably improved compared with the prior art.
Further, the increase or decrease of the total number of dispersions can be easily dealt with by the increase or decrease of the primary partition wall 7 and the secondary partition wall 12 that divide the primary mixing chamber 8 and the secondary mixing chamber 13, and the mixing element 1 is the conventional one. Thus, a mixed element body 1 having the same outer shape and a different total number of dispersions can be obtained. Thus, the total number of dispersed elements as a static mixer when the mixed element bodies 1 are connected in the flow path structure 19 can be obtained. There is an effect that the degree of freedom of setting increases and the adjustment of the mixing degree according to various fluids can be easily performed.
Next, since the primary mixing chamber group 9 of the primary mixing element unit 2 and the secondary mixing chamber group 14 of the secondary mixing chamber unit 3 are formed in a multiplexed manner, the number of groups of the primary mixing chamber group 9 and the secondary mixing chamber group 14 is increased. In addition, the total number of dispersed particles can be remarkably increased, and the above-mentioned fineness of the dispersed particles and the uniform mixing effect can be maintained without any loss regardless of the number of groups.
Next, since the primary partition wall 7 of the primary mixing element part 2 and the secondary partition wall 12 of the secondary mixing element part 3 are provided with their positions in the circumferential direction matched, Provided is a mixing element body 1 that can be maximized, thereby reducing the pressure loss during flow and increasing the flow velocity and flow rate.
Next, since the primary partition wall 7 of the primary mixing element part 2 and the secondary partition wall 12 of the secondary mixing element part 3 are alternately provided at substantially equal intervals in the circumferential direction, the above-described effect In addition, at the time of each dispersion, the mixing element body 1 having a uniform dispersion mixing action can be provided.
Next, the through-hole 16 is provided in the outer side of either the primary plate part 4 of the primary mixing element part 2 or the secondary plate part 10 of the secondary mixing element part 3, and the primary mixing chamber 8 or the secondary mixing chamber 13 is provided. Since the secondary inlet / outlet 15 is communicated with the through-hole 16 without opening it to the outside, when the secondary inlet / outlet 15 is provided in the primary plate part 4 of the primary mixing element part 2, the flow flows in the inflow direction. When the secondary inlet / outlet 15 is provided in the secondary plate part 10 of the secondary mixing element part 3, the mixing element body 1 can be used by linearly connecting it. The dispersive mixing ability of the element body 1 alone can be remarkably improved.
Further, since a plurality of radial partition walls 17 are formed in the through-hole 16 to form the secondary entrance / exit 15, the fluid is further dispersed and mixed when the fluid flows out according to the numerical aperture of the partition wall 17; Provided is a mixed element body 1 capable of further improving the dispersion capacity based on the total number.
The mixing action of the static mixer according to the present invention consists of complicated behavior of a three-dimensional fluid, so the details of the mechanism are not necessarily clear, but the mixing process is schematically shown in FIG. become.
In the figure, the fluid flowing in from the inlet / outlet 5 of one of the primary mixing element portions collides with the bottom surface 50 of the opposing secondary mixing element portion and changes its direction, and flows radially along the bottom surface 50 as indicated by arrows. The fluid is dispersed by the partition wall 12, is redirected by the outer wall 30, exceeds the step of the outer wall 20 of the primary mixing chamber 8 on the opposite side, and is dispersed by the partition wall 7 and adjacent thereto. The mixed flow is combined with the dispersed flow to be mixed into the mixing chamber 8. Further, the fluid is redirected to the opposing secondary mixing chamber 13 by the outer wall 20 on the outer side of the mixing chamber 8, crosses the step of the outer wall 30, is dispersed by the partition wall 12 and is adjacent. The dispersed flow from the mixing chamber joins and flows into the mixing chamber 13 and is mixed, and thereafter the same mixing process is repeated.
As is apparent from the above, the mixing process of the mixer according to the present invention comprises a mixing chamber group in which the mixing chambers formed on the two-layer boundary surface of the mixing element body are arranged circumferentially with respect to the mixed fluid. Further, these mixing chamber groups are concentrically arranged, and the mixing chamber groups are displaced in the radial direction and the circumferential direction between the pair of mixing element portions, so that each mixing chamber is in the radial direction. Each of the mixing chambers communicates with the two mixing chambers and is subjected to a shearing force by being stepped by the outer wall between the rows of the respective mixing chamber groups, so that the fluid flows in the concentrically arranged mixing chambers in a radial or centripetal manner. During the flow, the process of mixing by receiving dispersion and shearing force is repeated.
In other words, the basic structure of the static mixer is that a group of mixing chambers composed of grooves formed in a pair of mixing elements are arranged circumferentially and annularly concentrically in the centripetal direction, that is, in the radial direction. By arranging the pair of mixing element portions concentrically with each other, the respective mixing chamber groups are overlapped in the radial direction and the positions in the circumferential direction are alternated. The above mixing process is realized by deviating by a predetermined angle and communicating with each other.
The fine dispersion action due to the dispersion and shearing force is made uniform by the mixing effect represented by the large total number of dispersions composed of these mixing chamber groups, so that the droplet diameter is uniform over the entire mixed fluid. Fine dispersed particles are obtained.
Therefore, based on these mixing processes and basic configurations, the grooves constituting the mixing chamber are not limited to the form partitioned by the dividing wall and the outer peripheral wall, and the basic positional relationship of the mixing chambers that brings about the above mixing processes. Similar functions can be achieved by various shapes and structures satisfying the above requirements.
For example, as shown in FIGS. 15 (A) and 15 (B), the planar shape of the groove portion that becomes the mixing chambers 8 and 13 formed on the plate surfaces of the mixing element portions 2 and 3 is elliptical or other rounded. It may be a quadrilateral, its cross-sectional shape may be formed as a concave portion with an R formed at the corner, or its depth varied in the radial direction, and may be independent from each other in structure. In short, as is apparent from the mixing process described above, the mixing chambers / groups (8, 13: 9, 14) are arranged circumferentially and concentrically in an annular fashion, and liquid sequentially passes ( It is only necessary that each mixing chamber communicates with the two mixing chambers on the front and rear sides between the mixing chambers / groups (on the opposite side) and a step for applying a shearing force is formed between them.
In this example, the shearing action of the step between the mixing chamber groups is achieved by the radially outer wall of each mixing chamber.
In the above description, the fluid is alternately routed between the mixing chambers formed by the grooves formed in the two pairs of mixing element plate portions. Even if it is formed in the mixing element portion, it can be carried out in the same manner.
FIG. 16 is a schematic diagram showing a mixing process in the case where a groove serving as a mixing chamber is formed in only one of such mixing element portions. In this case, the mixing chamber 13 is formed in the secondary mixing element portion plate portion. The fluid flowing in from the fluid inlet / outlet 5 provided at the center of the opposing primary mixing element plate is directed radially along the bottom 50 of the mixing chamber as indicated by arrows in the figure, and the dividing wall 12 And mixed with the adjacent dispersed flow beyond the stepped portion 30 of the mixing chamber, and flows into and mixed with the mixing chamber 13. Hereinafter, the mixing process proceeds by repeating this process, and the mixing process is the same as that obtained by concentrically superposing the pair of mixing elements.
In order to form a fluid flow path or mixing chamber between the mixing element portions, a member for closing each mixing chamber and the flow path between them is required, and one of the opposing mixing element portions is relative to the mixing chamber. In other words, it becomes a cup-shaped casing and forms the flow path of the mixed fluid or the wall surface of the mixing chamber. The step portion 30 is formed as a weir-like wall that divides the mixing chamber in the radial direction as in the above example, and a part of the step portion 30 is lowered to communicate with the mixing chamber in the next row so that the ceiling is lowered. A gap may be provided between the casing and the casing side, but it is only necessary to form a step between the mixing chamber groups in the next row. A step is provided between the mixing chamber groups, an inclined surface is provided between the mixing chambers to form a step on the rear side thereof, or the next row is used as a step between the next mixing chamber group. A mixing chamber may be formed.
Examples are shown in FIGS. 17 (A) and 17 (B). In the figure, each mixing chamber of such a step-like mixing chamber group is partitioned by a dividing wall 12, and the mixing chamber 13 is formed between the stepped portion 30 and the mixing element portion 2 serving as the partition wall 12 and the casing. Form. In the static mixer having this structure, the fluid flowing in from the fluid inlet / outlet 5 of the mixing element unit 2 collides with the bottom surface 50 of the opposing mixing element unit 3 and travels radially in the circumferential direction along the bottom surface. It is dispersed by the dividing wall 12 and is given a shearing force by the step 30, merges with the dispersed flow from the adjacent region, and flows into and mixed with the mixing chamber 13 in the next row. Thereafter, the above-described mixing action is achieved by repeating this process.
Such a mixer having a stepped mixing chamber group is more fluid than other examples in which the mixing process proceeds beyond a weir-shaped outer wall between mixing chambers formed in a pair of mixing elements. There is an advantage that resistance is small and flow velocity and flow rate can be increased.
In the example of FIG. 18, a partition 40 having an inclined surface 41 is provided between the mixing chambers in a circumferential shape, and the outer peripheral side becomes a step 30, so that the partition 40 in the next row is between The mixing chamber 13 is configured between the bottom surface of the casing and the casing in contact with the top surface 46 of the partition. The inclined surface 41 changes the direction of the fluid in the tangential direction of the circumference formed by the mixing chamber group with respect to the fluid, collides with the shunt flow from the adjacent mixing chamber, and accelerates the merged fluid to the mixing chamber in the next row. Has the effect of flowing in. As a result, the mixed fluid becomes a finely dispersed mixed fluid by the two-liquid collision action and the wall collision action by merging and accelerating and being directed to the bottom surface and the wall surface 41. In the case of a liquid-liquid mixed fluid Can form fine emulsions.
In addition, when forming the mixing chamber as a step between the mixing chamber groups as they are, the mixing chamber groups are stepped for each row by these steps, but between adjacent mixing chambers, The fluid flowing into the next row is divided into two parts as a partition body 40 that is divided by the partition wall 12 or is divided into flat surfaces by dividing the next row of mixing chambers by a step.
Further, FIG. 19 shows another embodiment of the present invention. The basic configuration is the same as the embodiment shown in FIG. 18, but the bottom surfaces forming the stepped steps between the mixing chambers are extended as they are and divided as the division body 40. This corresponds to a structure in which the inclined surface 41 of the partition body 40 in the embodiment of FIG. 17 is gently inclined to form a water surface on the structure and integrated with a continuous stepped bottom surface. As a result, as shown in the figure, each bottom surface 50 has a shape arranged in a stepped manner as a collision surface.
The behavior of the fluid is basically the same as that of the embodiment of FIG. 18 described above, and the fluid press-fitted from the fluid inlet / outlet 5 of the mixing element body 2 is changed in the direction perpendicularly by the collision surface 50 and is changed in the radial direction. Opposite, it is dispersed by the division body 40 and can be changed in the circumferential direction, and the fluid after merging is accelerated and collides against the bottom surface 50 of the next-stage division body 40.
The bottom surface of the divided body 40 divides the mixed fluid into the next row of mixing chambers and divides the mixed fluid finely by a so-called wall collision action. On the other hand, it is subjected to the dispersive action of the so-called two-liquid collision system, which is directed in the tangential direction and adjoins, repeats the process of joining and accelerating and being guided to the mixing chamber in the next row, thus exhibiting an effective dispersive action. be able to.
According to these embodiments, the structure of each mixing element portion is further simplified and easy to manufacture, and can have higher rigidity in terms of strength. In addition, even the advantages of the above-described cleaning treatment can exhibit a more excellent effect.
FIG. 20 shows still another embodiment of the present invention, but since the structure of the mixing element portion 2 is basically the same, only the mixing element portion 3 is shown. In this example, the number of division bodies 40 arranged in the circumferential direction is reduced to 6 from the above embodiment, and the extension of the outer periphery of the collision surface 50 is a division wall 12. The aim is to achieve a more effective gas / liquid and liquid / liquid dispersion action by quickly guiding the fluid to the next-stage mixing chamber, reducing the flow resistance, and increasing the flow rate / flow velocity. The number of such partition walls and channel divisions can be changed as appropriate depending on the type of fluid to be mixed and the properties such as viscosity. It can be provided as appropriate using the arrangement or structure or as a modification thereof.
A specific example representing the characteristics of the present invention has been given above, or the shape and structure of the mixing chamber that disperses the mixed fluid and gives a shearing force in the flow path formed between the mixing element portions 2 and 3. Can be changed in various ways depending on the basic structure clarified in the mixing process, and by changing the shape, positional relationship, or number thereof, the properties and applications of the mixed fluid, or the target gas / liquid, liquid / liquid It is possible to cope with the drop diameter of the dispersed particles.
For example, the shearing force applied to the fluid between the mixing chambers is adjusted not only by the size of the weir-shaped step, but also by the slope of the partition, the size of the stepped step, or the planar shape of the partition, Moreover, it can also adjust by changing the shape and structure of the flow path between these space | intervals and the mixing element parts 2 and 3. FIG.
Further, although not mentioned in the above description, the other mixing element portion 2 forming the flow path also has a collision action with the fluid as in the case of the conventional wall surface collision system, and these actions are performed. The shape and structure is not a simple cup shape, if necessary, for example, to adjust the flow velocity and flow rate according to the properties of the fluid, so that it can be used effectively, or as a collision wall with the mixing element part 3, The structure and shape can be modified so that the flow path is enlarged and converged.
As described above, the shape, structure, number, and the like of each constituent element described in the claims of the present invention can be changed depending on the properties of the fluid to be treated, the purpose and application of the mixing, and the like. Obviously, the invention is not limited to the form of examples.
Industrial applicability
The static mixer according to the present invention has a simple structure composed of the shape and structure of the mixing chamber (group), which is a flow path formed from the mixing element portions 2 and 3, and the mutual positional relationship. It can be easily handled by changing the shape and structure of these structural elements in response to various conditions such as the properties and applications of the fluid or the required droplet size of the emulsion, and storing these data Thus, more appropriate conditions can be set.
The mixer of the present invention is also characterized in that there is no restriction in size in principle and structure, and it can be expanded to an industrial scale and production volume by scaling up, while its simple structure is advantageous in downsizing. Not only is it possible to reduce the size of the structure, but also when the fluid is emulsified and mixed, the simple structure is less affected by fluid flow resistance, viscous resistance, turbulence, etc. Or the microminiature device operates as effectively as the large size device.
In addition, the mixer of the present invention has a low pressure loss, so that the flow rate is large and efficient. In addition, since the mixer operates effectively at a low pressure, the load on the pump can be reduced. Higher and finer emulsions can be carried out under practical pressure conditions.
As for the target mixed fluid, the above explanation is mainly made in the case of two-liquid mixing. However, the same effect is obtained also in the case of gas-liquid mixing, liquid-solid mixing, and kneading for high viscosity fluid. As a result, the gas-liquid mixture is suitable for miniaturization and ultra-miniaturization as described above. Since the resistance is small, it can be applied to a kneading process that has been difficult in the past, and the above-described simple structure and excellent cleaning properties are indispensable characteristics for food and chemical applications. Application to the industrial field can contribute to the development of industry widely.

Claims (12)

A mixing chamber composed of a two-layer structure of a primary mixing element portion and a secondary mixing element portion, forming a primary inlet / outlet in one plate portion thereof, and communicating with this at a boundary surface of the two-layer structure around the primary inlet / outlet Are arranged in a circumferential manner, and the circumferential mixing chamber groups are concentrically arranged to provide a shearing force between the mixing chambers in the radial positional relationship of the mixing chamber groups. A mixing element of a static mixer, wherein the two mixing chambers are configured to communicate with each other via each other. It consists of a two-layer structure of a primary mixing element part and a secondary mixing element part. A primary groove portion is formed, a plurality of primary partition walls are radially formed in the primary groove portion, a primary mixing chamber group consisting of primary mixing chambers divided by the primary partition wall is provided, and the secondary mixing element portion is An annular secondary groove is formed at the boundary of the two-layer structure of the secondary plate part, and the same number of secondary partition walls as the primary partition wall are formed radially in the secondary groove part. A secondary mixing chamber group consisting of divided secondary mixing chambers is provided, and the secondary mixing chamber and the primary mixing chamber partially overlap in the diameter direction, and the primary inlet / outlet is the primary mixing chamber or the secondary mixing chamber. It communicates with either one of the chambers, and the other primary mixing chamber or secondary mixing chamber is open to the outside and serves as a secondary entrance. Mixing elements of the static mixer to. 3. The mixing element of the static mixer according to claim 2, wherein a plurality of primary mixing chamber groups of the primary mixing element section and a plurality of secondary mixing chamber groups of the secondary mixing element section are formed concentrically. body. The primary partitioning wall of the primary mixing element part and the secondary partitioning wall of the secondary mixing element part are provided with their positions in the circumferential direction matched to each other. Mixing element of static mixer. The primary partition wall of the primary mixing element part and the secondary partition wall of the secondary mixing element part are provided with positions in the circumferential direction alternately at substantially equal intervals. The mixing element of the static mixer according to claim 4. A through-hole is provided on the outer peripheral side of either the primary plate part of the primary mixing element part or the secondary plate part of the secondary mixing element part, and the primary mixing chamber or the secondary mixing chamber is not opened to the outside. 6. The mixing element of a static mixer according to claim 2, 3, 4 or 5, wherein the mixing element is a secondary inlet / outlet. 6. The mixing element body according to claim 6, wherein a plurality of radial partition walls are formed at the through-holes to form secondary entrances. The mixing chambers formed in the primary mixing element part and the secondary mixing element part are formed as independent recesses on the boundary surface of the two layers of both plate parts, respectively. A mixing element of the described static mixer. It consists of a two-layer structure of a primary mixing element part and a secondary mixing element part, and forms a primary inlet / outlet in one primary element part plate part and flows on the opposite surface with respect to the other secondary mixing element part. A cup-shaped casing that forms a path is formed around the collision surface facing the primary entrance of the secondary element portion, and the mixing chambers communicating therewith are arranged in a circumferential manner. The mixing chamber groups are arranged concentrically, and the two mixing chambers are configured to communicate with each other through a step that applies a shearing force between the mixing chambers in the radial positional relationship of the mixing chamber groups. A mixing element body of a static mixer characterized by comprising: Each of the mixing chambers is partitioned by a dividing wall, and each row of the mixing chambers formed in a circumferential shape is formed in a stepped shape with the step, and the dividing wall and the step and the cup-shaped primary mixing element portion 10. The static mixer according to claim 9, wherein a mixing chamber is formed therebetween. By forming an inclined surface between the mixing chambers, the step is formed on the inclined outer peripheral side, and a mixing chamber is formed between the step and the inclined surface between the next row mixing chamber and the cup-shaped primary mixing element portion. 10. The static mixer according to claim 9, wherein The circumferentially formed mixing chambers in each row are stepped to form the step, and the mixing chambers are partitioned by the extension of the mixing chamber in the front row, the step, the front row extension side wall, and The static mixer according to claim 9, wherein a mixing chamber is formed between the cup-shaped primary mixing element portion.

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