JPH0243932A - Mixing element - Google Patents

Abstract

PURPOSE:To enhance mixing efficiency by providing a fluid passage structure in a passage pipe so as to form a plurality of fluid passages and providing an auxiliary body magnifying a fluid contact area and shearing force to the inner peripheral surface of the passage pipe and the surface of the fluid passage structure. CONSTITUTION:The mixing element is constituted of passage pipes 3, 8 through which a fluid flows and fluid passage structures 6, 11 forming a plurality fluid passages in said passage pipes. Auxiliary bodies 7, 12 (e.g., porous bodies), which magnify the fluid contact surfaces of the passage pipes 3, 8 and the aforementioned fluid passage structures and shearing force, are provided to the inner peripheral surfaces of the pipes 3, 8 and the surfaces of the structures 6, 11. Each of the aforementioned fluid passage structures is composed of the spiral blade partitioning the inside part of each of the aforementioned passage pipes to form a plurality of the fluid passages and twisted from one end part in the longitudinal direction thereof to the other end part thereof in a right or left direction. A plurality of mixing elements thus constituted are connected in the longitudinal direction of the passage pipes so that the adjacent end edges of the blades of the adjacent elements form predetermined angles mutually.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mixing element for mixing a small number (at least two or more types of fluid) and a static fluid mixer using this mixing element.

In a static fluid mixer, a fluid passage structure having no mechanically movable parts is disposed within a passage pipe, and two or more types of fluids are mixed by flowing fluid through the passage pipe.

This type of static fluid mixer is used in the chemical, food, anti-pollution technology, electronic industry, and many other fields.

Conventionally, as a static fluid mixer for mixing two or more types of fluids, (1) a plurality of bent sheet-like blades are inserted in series in a point contact manner into a hollow cylindrical tube, and the ends of adjacent blades are Mixing tools are constructed by connecting and fixing the edges so that they are perpendicular to each other (e.g., Japanese Patent Publication No. 1982-8290)
, (II) As shown in FIG. 15, a cylindrical passage pipe 53
A plurality of fluid passages 57 and 58 are formed by partitioning this inner portion by a spiral blade 55 to form a mixing element 51, and a plurality of mixing elements 51
A fluid mixer in which the adjacent edges of the blades are arranged at a predetermined angle (for example, JP-A-58-128134
No.) etc.

However, such conventional static fluid mixers do not necessarily provide a sufficient fluid mixing effect, and in the case of gas-liquid mixing, sufficient gas absorption and mixing effects cannot be expected. Furthermore, in the case of dust collection, it was extremely difficult to capture minute particles.Furthermore, in the case of mixing powder and granular materials, a sufficient mixing effect could not be obtained.

Therefore, in the present invention, the mixer has a simple and compact configuration, has a high fluid mixing effect (particularly suitable for gas-liquid mixing, and is also capable of mixing powder and granular materials, and a mixing element using the same. The purpose is to provide a static fluid mixer.

The mixing element of the present invention includes a passage tube through which fluids to be mixed flow, and a fluid passage structure forming a plurality of fluid passages inside the passage tube.

In addition, an auxiliary body is arranged on the inner circumferential surface of the passage pipe and the surface of the fluid passage structure (both sides) to increase the contact area with the fluid and the shear force, thereby increasing the mixing effect. It is.

Further, in the present invention, a plurality of these mixing elements are connected in the longitudinal direction of the passage pipe, and at that time, adjacent edges of the blades of adjacent mixing elements are arranged at a predetermined angle to each other to form a static mixer. Configure.

The fluid mixed by the static fluid mixer of the present invention includes liquid, gas, and powder.

In particular, according to the present invention, fluids having different physical properties such as viscosity,
It is possible to mix at least two or more types of fluids with different characteristics or materials, such as fluids with different compositions, fluids with different temperatures, fluids with different colors, or fluids with different particle sizes. Furthermore, in addition to mixing liquids and gases, it is also possible to mix fluids together, which has been difficult in the past, such as mixing liquids and gases, and mixing powders and granules.

Furthermore, it is also possible to proceed with a chemical or biochemical reaction while mixing these fluids in the static fluid mixer of the present invention. That is, the static fluid mixer of the present invention can be used not only for mixing fluids on a boat, but also for gas absorption, dust collection,
It can be used in a wide range of applications, including mixing powder and granular materials.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 respectively show a mixing element 1 (twisted to the right) and a mixing element 2 (twisted to the left) according to an embodiment of the present invention. .

The mixing element 1 is composed of a cylindrical passage pipe 3, a spiral vane 6 and an auxiliary body 7, which are fluid flow path structures formed within the passage pipe 3. The vane 6 is twisted clockwise (rightward) by 90° from the inlet end to the outlet end in the longitudinal direction of the passage 'f3.

On the other hand, the mixing element 2 includes a cylindrical passage pipe 8, a spiral blade 11 formed on the passage pipe 8, and an auxiliary body 12. The blade 11 is connected to the passage pipe 8
The flow path is twisted by 90° counterclockwise (to the left) from the inlet end to the outlet end in the longitudinal direction of the flow path.

The passage pipes 3, 8 and the vanes 6, 11 can be made of aluminum, stainless steel, ceramic or plastic, and the passage pipes 3.8 and the vanes 6, 11 may be formed in one piece, or , they may be formed separately and then welded or brazed. However, if the passage pipe 3.8 and the vanes 6, 11 are integrally formed, manufacturing becomes easier and no weld bulges or the like are formed on the mixing element 1.2, thereby avoiding abnormal fluid retention. This has the advantage of Further, it is preferable that the edges of the blades 6 and 11 be rounded. Accordingly, the resistance to passage of fluid can be reduced. Further, by rounding the interface between the vane 6° 11 and the passage pipe 3.8, it is possible to prevent fluid from abnormally staying at the interface.

Furthermore, an inner annular projection 13.14 and an outer annular projection (not shown) for connecting the mixing element 1.2 are formed at both ends of the passage pipes 3, 8 in the longitudinal direction of the flow path, respectively. A plurality of mixing elements can be connected by fitting the inner annular projections 13, 14 of one of the mixing elements 1, 2 into the outer annular projection of the other mixing element 1.2.

Inside the mixing element 10 passage pipe 3, there are blades 6
Fluid passages 4 and 5 are formed, which are partitioned by , and these fluid passages 4 and 5 are spirally turned clockwise. Moreover, fluid passages 9 and 10 partitioned by vanes 11 are formed inside the passage pipe 8 of the mixing element 20, and the fluid passages 9 and 10 are spirally turned in a counterclockwise direction. Further, the fluid passage 4.5.910 has a semicircular arc shape in vertical cross section over the longitudinal direction of the passage pipes 31, 8.

In the present invention, as shown in FIG. 3, in particular, a mesh member 7 having a predetermined thickness is provided as an auxiliary member on the inner circumferential surface of the passage pipe 3.

This mesh-like body 7 may be fixed to the inner circumferential surface of the passage pipe 3 by adhesive, as shown in FIG. Tools (not shown)
The mesh-like body 7 may be fixed and attached from K. Furthermore, instead of being arranged along the inner peripheral surface of the passage pipe 3,
It may be arranged along the surface of the blade 60.

This mesh body 7 is made of fibrous plastic, metal,
Ceramic, glass, carbon, or a composite material thereof woven into a two-dimensional or three-dimensional structure is used. In particular, when using metal fibers, it is preferable to sinter them after weaving them together.

As the auxiliary body used in the present invention, in addition to the Messi's body 7 shown in FIG. 3C&), various types of auxiliary bodies can be used. A porous body 15 as shown in FIG. 3(c) or an uneven body 16 as shown in FIG. 3(c) may be used. The porous body 15 and the uneven body can be manufactured using a material such as plastic, metal, ceramic, glass, or carbon by a molding method such as sintering molding or compression molding. In particular, when a porous body is used as an auxiliary body, it is preferable to form as many fine through holes as possible in the auxiliary body in order to increase the contact area with a plurality of fluids and improve the mixing effect. Furthermore, when the porous body is made of metal or plastic, it is also possible to use foamed metal or foamed plastic. Furthermore, the shape of the protrusion of the uneven body 16 can be various, such as rectangular, triangular, or circular. Even in the case of the porous body and uneven body of the present invention, it is possible to increase their surface area and expand the shear force and the contact area with a plurality of fluids on the inner circumferential surface of the passage pipe, as in the case of the mesh body. , As a result, it becomes possible to improve the mixing efficiency.

Furthermore, in the embodiment of the present invention, as shown in FIG. 3(d), a microporous body 18 having fine pores is used as an auxiliary body.
is fixed to the inner circumferential surface of the passage pipe 3, and a coarse porous body 17 having coarse pores is fixed inside this fine porous body 18, thereby laminating the fine porous body 18 and the coarse porous body 17. It can also be a structure. With such a configuration, when the present invention is used as a device for removing foreign substances in gas, an aqueous solution is injected from a spray nozzle, and the aqueous solution that adheres to and flows down a porous body first removes the coarse porous material. Coarse particles in the gas are captured by the body 17, and then fine particles remaining in the gas are captured by the fine porous body 18. Therefore, fine particles of various sizes can be removed from the gas extremely efficiently, so when used in a dust collector, high dust collection efficiency can be expected.

Further, as shown in FIG. 3(e), the mesh-like body 7 may be arranged so as to have a gap 19 between it and the inner circumferential surface of the passage pipe 3. Furthermore, as shown in Figure 3), an uneven body 16 may be fixed to the inner circumferential surface of the passage pipe 3, and a mesh body 7 may be disposed on the uneven surface of the uneven body 16. Third
As shown in Figure @), the inner circumferential surface of the passage pipe 3 is formed into a tapered shape, and a fine porous body 18, a mesh-like body 7, an uneven body 16, or a coarse porous body 17 is formed on the tapered inner circumferential surface. An auxiliary body consisting of the above may be fixed alone or in a stacked manner. Alternatively, as shown in Fig. 3 Φ), K, passage pipe 3
A tapered mesh-like body 7 is formed on the inner peripheral surface of the body through a gap 19.
(auxiliary body) may be fixed. As a result, when the mixing element of the present invention is used as a wet type dust collector, the contact area between gas and liquid increases, and the dust collection efficiency improves. Further, when the mixing element of the present invention is used in a gas-liquid contact device, the contact area between gas and liquid becomes large, and the gas-liquid contact efficiency is further improved.

Next, a static fluid mixer using the mixing elements 1 and 2 of the present invention will be explained.

As shown in FIG. 4, the static fluid mixer 21 of the present invention has a clockwise (rightward rotation) type mixing element 1 and a counterclockwise (leftward rotation) type mixing element 2 connected to a pipe 2.
0, and the annular projections 13.14 are fitted into each other to connect these mixing elements 1.2. At this time, the element 1.2 is arranged in such a way that the edges of the blades 6, 11 are perpendicular to each other in the connected position. In the static fluid mixer 21 configured in this way, two types of fluids FA and F
B flows from the inlet of the fluid mixer 210 and flows into the fluid flow path of the mixing element 1, respectively.
It is turned spirally by 90° to the right while flowing through it. Then, the fluids FA and FA are separated by the mixing element 1 and this connection point, and flow through the other fluid passage of the mixing element 1 to join the separated fluids FB and FA.

Further, the divided and merged fluids are spirally turned 90 degrees to the left while flowing through the arrow mixing element 2. Furthermore, the fluid is divided at the next connection point between the mixing elements 2 and 1 and merges with the fluid flowing through the other fluid passage. In this way, as the fluid flows through the fluid passageway by spirally turning to the right or left, respectively, a turbulent movement is created in the fluid and the fluids are mixed. Furthermore, by fixing the auxiliary body in the fluid passage, the contact area between fluids is expanded,
Further, the fluid is sheared to further promote mixing of the fluid. Therefore, the fluid is mixed into the mixing elements 1, 2
The two types of fluids FA and FB are mixed into a uniform single fluid during repeated rotation, contact, shearing, division, and merging in the fluid passage.

FIG. 5 shows a 90° right-swivel mixing element 22 having three fluid passages 24, 25, 26. This mixing element 22 can mix two or more types of fluid (for example, three types) more efficiently than a mixing element having only two fluid passages. A similar mixing effect can also be obtained with a 900 left-handed mixing element (not shown).

FIG. 6 shows a mixing element 27 having an opening 31 extending from one end of the blade 29, 30 in the longitudinal direction (fluid flow direction) to the other end. By forming the openings 31 in the longitudinal direction of the blades 29 and 30 in this way, the shear force against the fluid increases in the diametrical and axial directions of the mixing element 27, making it possible to mix the fluid efficiently. Note that this opening 31 is
It may have a shape in which one end thereof is closed. Furthermore, 8g6
The mixing effect can be further improved by forming openings in the longitudinal direction of the blades of the mixing element with three fluid passages as shown in the figure.

In the present invention, when arranging the mixing elements 1 and 2 to configure a static fluid mixer, right-handed and left-handed mixing elements as shown in the above embodiments are alternately arranged. It is not limited to the arrangement in which the blades are arranged so that the edges of the blades are perpendicular to each other. For example, a pair of right-handed mixing elements are connected so that their edges are parallel, a pair of left-handed mixing elements are connected so that their edges are parallel, and It is also possible to connect a right-handed mixing element and a pair of left-handed mixing elements such that the edges of their blades are perpendicular to each other. With this configuration, the fluid is first
After flowing in an 80° spiral, the fluid then reverses and flows in a 180° spiral in the opposite direction. It is also possible to alternately arrange the mixing elements so that they are right-handed, left-handed, left-handed, and right-handed, and the edges of the blades of each mixing element are orthogonal. It is. Furthermore, the present invention provides 5i as shown in FIG.
The C mixing element 42A may be twisted 180' to the right or left. In this case, the mixing element 42 is composed of a cylindrical passage pipe 43, and the passage pipe blades 45 are spiral blades 45 formed within the longitudinal direction 43 of the mixing element 42A.

Twisted from one end to the other [rightward or leftward. Further, fluid passages 47 and 48 partitioned by vanes 45 are formed inside the passage pipe 43 of the mixing pipe 42A. Then, an auxiliary body is arranged on the inner peripheral surface of the passage pipe 43 or on the surface of the spiral blade.

In FIG. 8, an embodiment will be described in which a static fluid mixer 21 using a mixing element having the above-described configuration is applied to an exhaust gas removal device 32 that removes fine particles in exhaust gas. As shown in FIG. 8, exhaust gas containing fine particles such as SiO3, chlorine or hydrochloric acid mist, etc. is introduced into the exhaust gas removal device 32, and is fed into the removal device 32 while being sprayed with an aqueous solution sprayed from a spray nozzle 33. is passed through. This exhaust gas and aqueous solution are mixed into a mixing element 1 disposed within the removal device 32.
While flowing through 2 and 2, division, merging, and spiral rotation (reversal) in different directions are repeated, and the gas and liquid are appropriately mixed and brought into gas-liquid contact. In addition, the aqueous solution adheres to the mesh surface of the auxiliary mesh body 7.12 disposed on the inner circumferential surface of the mixing elements 1, 2, and the adhering aqueous solution comes into contact with fine particles in the exhaust gas. Due to this contact, fine particles in the exhaust gas are captured by the aqueous solution and fall together with the aqueous solution in the form of droplets.
is collected in a collection tank (not shown) located below. Further, chlorine, hydrochloric acid mist, etc. contained in the exhaust gas are dissolved in the aqueous solution and captured. In this way,
Droplets of aqueous solution containing fine particles and mist fall into the tank, where they are collected and stored. On the other hand, clean exhaust gas from which fine particles and mist have been removed is discharged to the outside by an exhaust fan (not shown).

According to the exhaust gas removal device configured in this manner, fine particles such as dust in the exhaust gas are efficiently removed. especially,
According to the removing device 32 of the present invention, it is possible to collect ultrafine particles having a particle size of 1 pm or less, which could not be removed by conventional dust removing devices. Furthermore, since the removal device is simply a combination of a plurality of mixing elements, the removal device has a simple structure and can be downsized. Furthermore, the maintenance of the device is easy, and the number of maintenance operations can be significantly reduced compared to conventional devices. Moreover, since the MEC 2-shaped body is disposed along the inner circumferential surface of the passage pipe, the pressure loss of the exhaust gas flowing through the mixing element is small. Therefore, the capacity of the exhaust fan may be small. Furthermore, liquid/gas ratio C1/rr
? This makes it easier to process high-concentration gases and reduces equipment costs for this type of equipment.

Further, troubles due to clogging in the removing device due to the attachment and growth of fine particles such as highly adhesive 5102 do not occur.

In the above-described embodiments of the present invention, the direction in which the gas and liquid flow through the removal device is the same (parallel flow), but the direction in which the gas flows and the direction in which the liquid flows are different. Alternatively, the flows may be in countercurrent directions, such that they oppose each other.

Next, the case where the present invention is used as an exhaust gas purification device for automobiles, etc. will be explained. In this case, as shown in FIG. 9, an exhaust gas purification device 34 may be installed in the middle of the exhaust gas pipe, and the exhaust gas may be made to flow through the purification device 34. In this case, each vane, passage pipe, and auxiliary body are made of a metal material, ceramic material, etc. that has a catalytic effect. This results in
While the exhaust gas flows through the purification device 34, nitrogen oxides (NOx) and the like in the exhaust gas can be removed without obstructing ventilation.

Furthermore, it is also possible to collect and purify fine particles such as carbon in exhaust gas. Furthermore, by manufacturing the mixing element with a self-heating element, it is also possible to burn off particulates such as carbon. It also has a silencing effect.

The catalyst supported on the passage tube, vane and auxiliary body of the present invention is, for example, a noble metal such as platinum, a metal salt such as an alkali metal salt, an alkaline earth metal salt, a molybdate or a silver salt, or a soluble salt of a rare earth element. etc. are used. These metal salts are usually used in the form of an aqueous solution, and the passage pipes, vanes, and auxiliary bodies are immersed in these catalyst-supporting solutions the required number of times and dried, or the required amount of the solution is applied to the passage pipes, vanes, and auxiliary bodies by spraying, etc. and after drying,
Fire. Alternatively, metal particles may be supported by heating, evaporating, and solidifying a metal material. Note that the purification efficiency is further improved by forming the passage pipe and the blades from a porous material.

The present invention is applied to a bioreactor 35 [when used]
As shown in FIG. 10, a fluid mixer 21 carrying microorganisms or immobilized enzymes is placed in a reaction tank 36, and a stock solution 3
7 may be passed through the fluid mixer 21. When using immobilized aerobic bacteria, add air or oxygen to the stock solution 3.
7 may be made to flow into the fluid mixer 21.

When using this bioreactor 35 to treat organic wastewater containing ammonia, etc., a fluid mixer 21 in which an auxiliary body carries microorganisms such as nitrifying bacteria is placed in the raw solution, and inside the mixer 21 When the stock solution is passed through, ammonia etc. are efficiently decomposed. In this case, a gas such as air or oxygen is supplied to the mixer 21 in order to activate the microorganisms.
Let the flow flow inside. In the mixer 21, the microorganisms, the stock solution, and air or oxygen are thoroughly mixed and contacted, and the organic wastewater is treated cleanly with low power costs. When supporting or immobilizing microorganisms, animal and plant cells, etc. on an auxiliary body, the auxiliary body made of a porous material or the like is immersed in pre-prepared microorganisms to adsorb the microorganisms, or the auxiliary body is immersed in a pre-fabricated microorganism to adsorb the microorganism, or a auxiliary body made of a porous material is immersed in a pre-prepared microorganism to adsorb the microorganism. It is also possible to bring the microorganisms and auxiliary bodies into contact with each other from the bacterial stage and to adsorb them as the culture progresses.In addition, the passage tubes and blades are made of a porous material, etc., and the enzymes, microorganisms, etc. are placed in the passage tubes and blades. It may be supported or immobilized.

Furthermore, when the present invention is applied as a powder/granular material mixing device 38, as shown in FIG. . In this case, it is preferable to use an auxiliary body 16 having an uneven protrusion.

As described above in detail, according to the present invention, it is possible to obtain a mixing element that has a high mixed bud and is easy to manufacture. In the present invention, while a plurality of fluids flow through a passage pipe partitioned by spiral blades, the fluids are mixed with high efficiency and come into contact with each other. Therefore, for example, the contact efficiency between gas and liquid is further improved, and dissimilar substances in the gas (fine particles such as dust or mist, etc.) are removed with high efficiency. Furthermore, when mixing a plurality of powders and granules, the improved shearing force allows for efficient mixing.

Dimensions such as the diameter and length of each mixing element, the twist angle of the blades, the intersection angle of adjacent edges of the blades, the shape and quantity of the blades, etc. can be set arbitrarily, depending on the type of fluid and application, etc. It is possible to select the appropriate one.

In the above embodiment, the fluid passage structure is a spiral blade that partitions the inner part of the passage pipe to form a plurality of fluid passages, but the structure is not limited to this. By configuring the fluid passage with an appropriately shaped VC in the passage pipe, it is possible to mix fluids with a wide range of Reynolds numbers.
can do. In the present invention, any fluid passage structure having no mechanically movable parts may be used.

Furthermore, as shown in FIG. 12, in the static fluid mixer of the present invention, spacers 42 having fluid passages between them and the mixing element 1.2 can be alternately inserted into the casing 41. In the fluid mixer 40 configured in this way, when the two types of fluids FA and FB flow through the mixing element 1, they turn 180° spirally to the right and reach the connection point between the mixing element 1 and the spacer 42. Then, fluids FA and FB merge. While flowing through the spacer 42, the merging fluids merge, converge, and further diffuse toward the center of the casing 41. The merged fluids are separated at the connection point between the spacer 42 and the mixing element 2, and then spirally rotated 180° to the left.

In this manner, the two types of fluids FA and FB are mixed into a uniform fluid while the fluids repeatedly rotate through 180 degrees and undergo the effects of merging, convergence, diffusion, and division.

In the present invention, as shown in FIG. 13, the spacer 42 is composed of a cylindrical passage pipe 44 and a fluid passage 43 formed within the passage pipe 44. The fluid passage 43 is continuous from one end to the other end in the longitudinal direction of the passage pipe 44, and the cross-sectional area of the body passage 43 may be constant in the longitudinal direction, or the constriction may be made constant. 431 may be formed in the fluid passage 43 to change its cross-sectional area. Furthermore, the spacer 42
An auxiliary body such as a mesh-like body 7 is placed inside the passage pipe 44.
It's okay.

Further, in the present invention, as shown in FIG.
Three vanes 61, 62, 63 may be provided inside the 90 passage tube 60 and an opening may be provided in the longitudinal direction of the passage tube.

[Brief explanation of the drawing]

In the accompanying drawings, FIG.
J A perspective view of the mixing element with the spiral blade turned to the right; FIG. 2 is a perspective view of the mixing element with the spiral blade turned 90 degrees to the left; FIG. 3 is a perspective view of various auxiliary bodies used in the mixing element of the present invention. 4 is a vertical sectional view taken along the flow path of a static mixer configured by connecting a plurality of mixing elements of the present invention, and FIG. The blade rotates 90 degrees to the right, and 3
a perspective view of a mixing element with fluid passages;
FIG. 6 is a perspective view of a mixing element having an opening in the longitudinal direction of the spiral blade rotated to the right by 90 degrees, which is an embodiment of the present invention, and FIG. 7 is a rightward or leftward direction, which is an embodiment of the present invention. 8 to 11 are schematic diagrams of the operation of a static fluid mixer using the mixing element of the present invention, and FIG. 12 is an embodiment of the present invention. A vertical sectional view along the flow path of a static fluid mixer with a certain spacer interposed between mixing elements, 8g13 is a perspective view of the spacer used in the static fluid mixer of FIG. 12, and FIG. 14 is a torsion FIG. 15 is a plan view of a spacer having blades and an opening in the longitudinal direction, and is a first view of a conventional mixing element.

Claims (1)

[Scope of Claims] 1. A mixing element consisting of a passage pipe through which fluid flows, and a fluid passage structure in which a plurality of fluid passages are formed inside the passage pipe, in which: A mixing element characterized in that an auxiliary body is provided on at least a part of the peripheral surface and the surface of the fluid passage structure to enlarge the fluid contact area and shear force of the surface. 2. The fluid passage structure partitions the inner portion of the passage pipe to form a plurality of fluid passages, and the spiral blade is twisted rightward or leftward from one longitudinal end to the other end of the fluid passage structure. A mixing element according to claim 1, characterized in that the mixing element comprises: 3. The mixing element according to claim 2, wherein an opening is provided in the longitudinal direction of the spiral blade. 4. The mixing element according to claim 1, wherein the passage pipe has a cylindrical cross section. 5. The mixing element according to claim 1, wherein the auxiliary body is made of a porous body. 6. The mixing element according to claim 1, wherein the auxiliary body is made of a mesh-like body. 7. The mixing element according to claim 1, wherein the auxiliary body is composed of an uneven body having an uneven surface. 8. A patent characterized in that the auxiliary body is a laminated structure in which a fine porous body is provided on the inner peripheral surface of the passage pipe, and a coarse porous body is arranged inside the fine porous body. A mixing element according to claim 1. 9. Claim 1, characterized in that the auxiliary body is made of a mesh-shaped body, and the mesh-shaped body is arranged so as to have a gap between it and the inner circumferential surface of the passage pipe. Mixing elements described in . 10. The auxiliary body is a laminated structure in which an uneven body is provided on the inner circumferential surface of the passage pipe, and a mesh-like body is arranged on the uneven surface of the uneven body. A mixing element according to range 1. 11. The mixing element according to claim 4, wherein the inside of the cylindrical passage tube is tapered, and an auxiliary body is provided along this tapered surface. 12. The mixing element according to claim 4, characterized in that a tapered auxiliary body is provided inside the cylindrical passage tube. 13. The mixing according to claim 2, wherein the spiral blade is twisted 90 degrees to the right or left from one end to the other end in the longitudinal direction of the mixing element. element. 14. The mixing according to claim 2, wherein the spiral blade is twisted 180 degrees to the right or left from one end to the other end in the longitudinal direction of the mixing element. element. 15. The mixing element according to claim 1, wherein the auxiliary body is bonded to an inner circumferential surface of the passage pipe and at least a part of the surface of the fluid passage structure. 16. The auxiliary body is fixed to the inner circumferential surface of the passage pipe and at least a part of the surface of the fluid passage structure by a fixture. mixing element. 17. The mixing element according to claim 1, wherein the auxiliary body supports a metal material having a catalytic action. 18. The mixing element according to claim 1, wherein the auxiliary body supports or immobilizes an enzyme having a biochemical catalytic action, a microorganism, or an animal or plant cell. 19. A passage pipe through which fluid flows, a fluid passage structure having a plurality of fluid passages formed inside the passage pipe, and at least a portion of the inner peripheral surface of the passage pipe and the surface of the passage structure. A plurality of mixing elements each having an auxiliary body for expanding the fluid contact area and shear force on the surface are connected in the longitudinal direction of the passage pipe, and adjacent edges of blades of adjacent mixing elements form a predetermined angle. A static fluid mixer in which the mixing element is arranged as described above. 20. The static fluid mixer according to claim 19, wherein a spacer having a fluid passage is interposed between adjacent mixing elements. 21. The static fluid mixer according to claim 20, wherein the spacer has a cylindrical shape. 22. The static fluid mixer according to claim 20, wherein the cross-sectional area of the fluid passage of the spacer changes from one longitudinal end of the spacer to the other end. 23. The spacer is characterized by having a plurality of blades spirally twisted in the rightward or leftward direction from one end in the longitudinal direction to the other end in the fluid passage of the spacer. A static fluid mixer according to claim 20. 24. The static fluid mixer according to claim 20, wherein the cross section of the fluid passage of the spacer is constant from one end to the other end in the longitudinal direction of the spacer. 25. The static fluid mixer according to claim 23, wherein an opening is provided in the longitudinal direction of the spiral blade of the spacer.