JP3142761B2 - Mixer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid or gas mixer, and more particularly, to a mixer which can be used as a reactor without a stirrer and without a risk of explosion.

[0002]

2. Description of the Related Art Generally, a mixer is provided with a stirrer, and the mixture is uniformly dispersed by rotating or reciprocating blades of the stirrer.

[0003]

However, the uniform dispersion according to this method has a problem that a great deal of time is required for stirring, in addition to the complexity of requiring a power mechanism. Further, depending on the type of the mixture and the mixing conditions, an abnormal reaction may be induced to cause an explosion. The present invention has been made in view of these problems,
No power mechanism such as wings required for stirring is required, and
It is an object of the present invention to provide a mixer free from a risk of explosion.

[0004]

In order to achieve the above object, a mixer according to the present invention is provided with a hot isostatic pressing sintering method in a plurality of concentrically arranged metal cylinders having different diameters. A mixer mainly comprising a first mixing cylinder formed by forming a metal porous body chamber made of a united body, and an inlet for each of the chambers is provided on one side of the first mixing cylinder. In each of the chambers, a bottom plate that blocks an axial flow path from the inflow port , except for the one positioned at the outermost in the radial direction, gradually moves away from the inflow port as the chamber is positioned more outward in the radial direction. Except for those located on the outermost side in the radial direction, on the outer peripheral portion of each of the metal cylinders,
A through hole is formed near the bottom plate located inside, on the inflow side from the bottom plate, and the fluid that has moved through the radially inner chamber moves to the radially outer chamber through each through hole. Then, it is mixed with other fluids in the metal porous body made of the hot isostatic pressing sintered body.

[0005] Here, the metal porous body chamber may be filled with a plurality of types of metal powders having different particle sizes and material types between metal cylinders and subjected to hot isostatic pressing, or the shape of each metal cylinder. It is preferable to form a hot isostatically pressurized sintered body having different porosity and pore diameter individually and press-fit it into a metal cylinder arranged concentrically. Further, the surface of the metal powder forming the metal porous body chamber was previously set to Zn,
If coating is performed by plating or vapor-depositing a metal such as Cr, Cu, Ag, Pt, or Ti, the action of a metal catalyst during a chemical reaction can be performed. In addition, the hot isostatic pressing process is a process in which a processing material is inserted into a pressure vessel, and a high isostatic pressure is applied using a gas as a pressure medium under a high temperature, thereby utilizing a synergistic effect of a high temperature and a high pressure. It refers to the process of sintering metal powder under pressure. However, if the temperature and pressure are too high, the porosity will decrease. On the other hand, if the temperature and pressure are insufficient, the adhesion between the particles will be lacking. Therefore, the temperature and pressure are adjusted to the optimum values according to the type of metal powder used. There is a need.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments. FIG. 1 is an external view of a mixer 1 according to the present invention, and FIG. 2 is a plan view (a) and a partial cross-sectional view (b) thereof. As shown in the figure, the mixer 1 is equipped with an upper mixing cylinder 2 having a concentric triple structure, a lower mixing cylinder 3 formed in a funnel shape, and a hollow chamber 4 provided therebetween. . The upper mixing cylinder 2 includes metal porous bodies 8 having a predetermined porosity and a predetermined pore diameter in large, medium and small metal cylinders 5, 6, and 7 formed of a corrosion-resistant metal such as stainless steel, titanium, and an alloy. 9,
10 are press-fitted, and the porous body chambers 2A to 2C
Are formed (FIGS. 2 to 4). And small diameter cylinder 5
A circular plate 11 is in close contact with the inner peripheral portion, and an annular plate 12 is in close contact between the small-diameter cylinder 5 and the medium-diameter cylinder 6 (FIGS. 4 and 5). A plurality of through-holes 5a and 6a are formed in the outer peripheral portions of the small-diameter cylinder 5 and the medium-diameter cylinder 6, respectively, in the vicinity of the upper side of the disk 11 and the upper side of the annular plate 12, in the circumferential direction. The through holes 5a and 6a are provided between the disc 11 and the annular plate 12 respectively.
And the circular plate 11 and the annular plate 12 are in close contact with the metal cylinders 5 and 6, the through-hole 5a functions as a flow path from the chamber 2A to the chamber 2B, and the through-hole 6a is , From the chamber 2B to the chamber 2C.

The metal porous bodies 8, 9 and 10 are hot isostatically pressed sinters formed in a columnar or cylindrical shape. The sintering raw material powder is, for example, stainless steel (SUS3).
04, SUS630 etc.), tool steel (SKD61, S
KD11), maraging steel (18Ni, 2
Various metals such as ONi-based metals, high-speed steels (such as SKH51 and SKH55), and non-ferrous metals (such as aluminum alloys and titanium alloys) are used. The porosity and pore diameter of the metal porous body are appropriately selected as necessary, but the porosity is 7.0.
In the case where the pore diameter is set to 50.0% or less and the pore diameter is set to 500 μm or less, it is based on the disclosure in the application specification of Japanese Patent Application No. 6-255228. That is, the raw material powder having a particle size corresponding to the porosity and the pore diameter is vacuum-sealed in a capsule, and hot isostatic pressing is performed at a lower temperature, a lower pressure, and a shorter time than the processing conditions for a high-density sintered body. A pressure sintering (HIP) process is performed. For example, in a HIP process using a stainless steel or alloy tool steel-based powder as a raw material powder, a temperature of about 400 to 800 ° C. and a pressure of 5
When the high-speed steel-based powder is used as the raw material powder, the temperature is about 30 to about 150 MPa and the processing time is about 0.5 to 4 hr.
The pressure is about 0 to 800 ° C., the pressure is about 50 to 150 MPa, and the processing time is about 0.5 to 4 hr. The porosity and pore diameter of the porous metal body obtained as a sintered body are adjusted by using a pressing temperature, a pressing force, a processing time, and the like as control factors. After the HIP treatment, a temperature range of 60 to 90% of the melting point is set to 2%.
When heat treatment is performed for a time period of about 10 to 10 hours, the bonding between particles can be strengthened without substantially changing the porosity or pore diameter of the sintered body. Alternatively, the raw material powder is filled in a rubber mold, cold isostatic pressing is performed to form a green compact, and then the powder compact is encapsulated or HIP-treated without being encapsulated. You may. In this manufacturing process, the porosity and pore diameter of the sintered body are controlled by the particle size of the raw material powder, the pressure under cold compaction, and the HIP processing conditions (temperature, pressure, time) of the compact. be able to.

The metal porous bodies 8, 9 and 10 are manufactured by the above-described method, and the porosity and the pore diameter of each porous body are largest in the columnar porous body 8 located at the center.
The ring-shaped porous body 10 located on the outer peripheral portion is set to be the smallest. In this example, the porous bodies 8 to 10 are press-fitted into the metal cylinders 5 to 7; however, the invention is not limited thereto, and the metal cylinders 5, 6, and 7 are arranged at equal intervals. In this state, raw material powders having different particle diameters may be filled and HIP-treated. In this case, a metal porous body having a triple structure having a different pore distribution is preferably formed integrally, but the metal cylinders 5, 6, and 7 are preferably formed to have a cross-sectional shape as shown in FIG. . Further, each of the porous bodies 8, 9, and 10 may have a multilayer structure in the axial direction.
It is preferable because the pore distribution can be varied not only in the radial direction but also in the axial direction. In this case, for example, the porosity or the like may be reduced from the upper part to the lower part of the porous bodies 8 to 10. However, the manufacturing method is disclosed in Japanese Patent Application No. 7-11.
No. 1593. That is,
A plurality of types of metal powders having different particle sizes and materials are stacked and filled, and a temperature of 0.2 to 0.85 mpK and a pressure of 0.5 to 15 are applied.
The multi-layer metal porous bodies 7, 8, 9 may be manufactured by performing hot isostatic pressing under the condition of 0 MPa. Here, mpK is the melting point (absolute temperature) of the powder, and refers to the melting point of the low melting point powder when different kinds of powders are stacked and filled. Also,
A plurality of types of metal powders having different particle sizes and materials may be stacked and filled, and after the cold pressing, a hot isostatic pressing may be performed.

The lower mixing cylinder 3 is composed of a metal cylinder 13, a metal porous body 14 inside the metal cylinder 13, and a funnel cylinder 15, as shown in FIG. The lower mixing cylinder 3 is a HIP
The metal porous body 14 produced by the treatment is
, Or by filling a metal cylinder 13 with metal powder and integrally molding by HIP processing. The funnel cylinder 15 is fixed to the metal cylinder 13 by welding or the like in pre-processing or post-processing. The assembled state of the mixer 1 shown in FIG.
The lower mixing cylinder 3 is fitted to a pressure-resistant casing 17 attached to the
Attach. Further, the upper mixing cylinder 2 is fitted on the lower mixing cylinder 3 and mounted and fixed in the pressure-resistant casing 17. On the other hand, a pressure-resistant casing cover 19 is mounted on the upper part of the upper mixture 2, and press-fitting pipes 8P, 9P for injecting a liquid or a gas into a chamber formed of the porous metal bodies 8, 9, 10 are mounted on the casing cover 19. , 10P. The casing cover 19 is fastened by fixing bolts 20.

FIG. 8 is a flow sheet showing an example of use of the mixer 1 according to the present invention. Liquid hoppers 21a, 21b,
The liquids A, B, and C of 21c are supplied to the mixer 1 via the opening / closing valve 22 and the pressure pump 23 and mixed, and the mixed liquid A
The state where + B + C is supplied to the next stage via the pump 24 and the check valve 25 is shown. The pressurizing pump 23 is controlled by a computer controller 26, and the additive liquid and the catalyst are stored in the additive liquid hopper 21d and the catalyst hopper 21e. Next, an example of the operation of the mixer 1 shown in FIG. 1 will be described with reference to FIG. The liquids A to C from the liquid hoppers 21a to 21c pass through the press-fit pipes 8P to 10P, respectively, and the porous body chambers 2A to 2C
C. In addition, the porous body chambers 2A to 2C
Are different from each other, the computer controller 26 considers the difference in the porosity, and
Is controlled to an optimum operating state. Each of the liquids A to C pressed into the porous body chambers 2A to 2C is divided into fine particles by the metal porous bodies 8, 9, and 10, respectively. The flow velocity at this time is determined by the porosity of the porous body and the pressure of the liquid. However, since the porosity of the porous body chamber 2A is large, the flow velocity and the flow rate are generally large. Then, the liquid A having descended from the porous body chamber 2A flows out of the through-hole 5a provided on the outer periphery of the metal cylinder 5, and flows into the porous body chamber 2B. On the other hand, the porosity of the porous body chamber 2B is formed to be smaller than the porosity of the porous body chamber 2A. However, the solution A and the solution B are uniformly mixed in the vicinity of flowing out of the through hole 5a. Similarly, the porosity of the porous body chamber 2C is formed to be smaller than the porosity of the porous body chamber 2B.
Is uniformly mixed with the liquid C in the vicinity of the outflow. After that, the mixed liquid A + B + C flows out into the hollow chamber 4, but passes through the porous body 14 filled in the lower mixing cylinder 2, whereby the mixed liquid A + B + C is further subdivided into a uniformly dispersed mixed liquid. .

Although the liquid mixing has been described above, it goes without saying that the mixer according to the present invention can also be used for gas mixing. In addition, even if a chemical reaction is involved, even if an abnormal reaction occurs, the risk of explosion is small and the safety factor is high.
This is because an extremely minute cavity in which the inside of the porous body is finely divided is formed. For example, it is said that the integrated area of the microcavities in activated carbon of 1 cm ³ is equivalent to 30 m ^2. However, although not discussed similarly, the size of the internal area of the microcavities of the porous metal body is , Effectively eliminating the risk of explosion. In addition, the porous body chamber 2A
Pt, Ag, Cu, Z on the metal powder forming ~ 2C
Select n, Cr, Ni, etc. and perform HIP sintering,
Alternatively, various reaction mechanisms can be formed by forming a metal catalyst by subjecting a metal powder obtained by plating or depositing these metals to HIP sintering. Therefore, it can be used not only as a mixer but also as a mechanism of a polymerization reaction and a polycondensation reaction by a chemical reaction.

[0012]

As described above, the mixer according to the present invention does not require a power mechanism for rotating or reciprocating the blades for stirring, and only allows a plurality of liquids and gases to flow. The liquid can be uniformly dispersed. In addition, it is an extremely excellent mixer that effectively functions as a chemical reactor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a mixer according to the present invention.

FIG. 2 is a plan view and a partial cross-sectional view of the mixer of FIG.

FIG. 3 illustrates a metal porous body that is a component of the upper mixing cylinder.

FIG. 4 illustrates a metal cylinder as a component of the upper mixing cylinder.

FIG. 5 illustrates an arrangement state of large, medium and small metal cylinders.

FIG. 6 illustrates a cross-sectional shape of a metal cylinder.

FIG. 7 illustrates a lower mixing cylinder.

FIG. 8 is a flow sheet showing a use state of the mixer of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mixer 2 Upper (first) mixing cylinder 2A-2C Porous chamber 3 Lower (second) mixing cylinder 4 Hollow chamber (hollow cylinder) 5-7 Large, medium and small metal cylinders 5a, 6a Through-holes 8-10 Metal porous body (Hot isostatic pressing sintered body) 8P-10P Press-fit pipe (inlet) 11-12 Bottom plate

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Sasaki 2-chome 2-3-2 Tsuundai, Suita-shi, Osaka (72) Ryutaro Motoki 1-1-1 Nakamiya Oike, Hirakata-shi, Osaka Prefecture Kubota Hirakata Co., Ltd. Inside the factory (72) Atsushi Funakoshi 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Inside Kubota Hirakata Factory (72) Inventor Takashi Nishi 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Kubota Hirakata Co., Ltd. Inside the factory (72) Inventor Akira Kosaka 1-1-1 Nakamiya Oike, Hirakata-shi, Osaka Kubota Corporation Hirakata Factory (56) References JP-A-48-15161 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) B01F 3 / 02,3 / 08,5 / 06

Claims (6)

(57) [Claims] 1. A first mixing cylinder comprising a metal porous body chamber made of a hot isostatically pressed sintered body formed in a plurality of concentrically arranged metal cylinders having different diameters. a mixer for the element, wherein the one side of the first mixing tube, said inlet is provided for each chamber, except those located radially outermost, said each chamber, A bottom plate that blocks an axial flow path from the inflow port is provided so as to be gradually distant from the inflow port as the chamber is positioned radially outward. In the outer peripheral portion of the metal cylinder, a through hole is formed in the inflow side from the bottom plate in the vicinity of the bottom plate located inside, and the fluid that has moved through the chamber on the radially inner side is provided with each of the through holes. To the radially outer chamber through A mixer characterized by being mixed with another fluid in a metal porous body made of a pressure sintered body. 2. The method according to claim 1, wherein the surface of the metal powder forming the metal porous body chamber is previously formed of Zn, Cr, Cu, Ag, P
The mixer according to claim 1, wherein the mixer is coated by metal plating or vapor deposition of t, Ti or the like. 3. A second mixing cylinder is mounted on the other side of the first mixing cylinder with a hollow cylinder portion interposed therebetween, and the second mixing cylinder is also hot-isolated in a metal cylinder. The mixer according to claim 1 or 2, wherein a metal porous body chamber made of a pressure sintered body is formed. 4. The metal cylinder of the first mixing cylinder includes large, medium and small metal cylinders.
The first mixing cylinder comprises a metal porous body chamber, a sintered body inside a small diameter cylinder, a sintered body between a small diameter cylinder and a medium diameter cylinder, and a sintered body between a large diameter cylinder and a medium diameter cylinder. The mixer according to any one of claims 1 to 3, wherein the porosity and the pore diameter are different between the sintered body and the sintered body. 5. The metal porous body chamber of the first mixing cylinder is formed by individually forming hot isostatically pressurized sintered bodies according to the shapes of large, medium and small cylinders, and then arranging them in a concentric manner. 5. The mixer according to claim 4, wherein the mixer is press-fitted to the large, medium and small cylinders. 6. The mixing cylinder according to claim 1, wherein a large, medium and small cylinders concentrically arranged are filled with a metal powder of a predetermined particle size, and hot isostatic pressing and sintering are performed. 5. The mixer according to 4.