JP5105270B2 - Mixing element and static fluid mixer using the same - Google Patents

Description

  The present invention uses a mixing element used in a static fluid mixer that mixes one or more fluids (liquid, gas, solid and / or a mixture thereof) without a mechanical moving part, and the same. The present invention relates to an improvement of a static fluid mixer.

  This type of static fluid mixer is used for mixing, stirring, extraction, distillation, gas absorption, dissolution, dissipation, emulsification, heat exchange, dispersion, powder mixing, and the like.

  Static fluid mixers are used in many fields such as the chemical industry, paper and pulp industry, petrochemical industry, pharmaceutical industry, semiconductor industry, optical fiber manufacturing industry, energy industry, and environment-related industry.

For example, an absorption tower type exhaust gas treatment device by gas-liquid contact of harmful substances such as HCl, NH ₃ , NOx, SOx, SiCl ₄ , SiHCl ₃ , SiF ₄ , CO ₂ , Hg, dioxin in exhaust gas and SiO in exhaust gas _2. It is used as a packing for dust removal equipment that collects and collects fine particles such as dust and dust, and distillation equipment. In addition, it is used as a device for removing and collecting organochlorine compounds, ammonia (NH ₄ ⁺ ), etc., and aeration processing equipment by wastewater discharge treatment.

  A conventional mixing element and a static fluid mixer using the mixing element have been filed by the present inventor, and are composed of two to four right-handed or left-handed spiral blades in a passage tube. Yes. This static fluid mixer has an opening at the center, and the edges of the right-handed and left-handed blades are alternately arranged orthogonally via the space. The blades have twist angles of 90 °, 180 °, and 270 °. Furthermore, the method of manufacturing the static fluid mixer includes a step of dividing the longitudinal direction of the passage tube into a plurality of pieces, joining two to four blades to the inner wall portion of the divided passage tube, and the passage The process includes joining the split surfaces of the pipes. (For example, see JP-A-5-168882).

  Next, a description will be given of a manufacturing method of a conventional mixing element that has a blade body that is disposed inside a cylindrical passage tube and that forms a plurality of fluid passages, and the fluid passages communicate with each other through an opening. To do. In this mixing element, the passage tube and the blade body are manufactured separately, and each is manufactured by joining them. The twisting angles of the mixing element are 90 °, 180 °, 270 °, and 360 ° (see, for example, JP-A-7-284642). In addition, the conventional mixing element is formed of a plurality of spiral blades disposed in the passage tube, and the blade member is missing at the center portion of the passage tube, and in order to increase the mechanical strength in the missing portion. The inner tube is intermittently installed. The rotation angle of the blade is 90 °, 180 °, or 30 °, 45 °, and 135 °. (For example, refer to JP 2001-170476 A.)

  Further, the mixing element is provided with an outer cylinder tube, a blade provided in the outer tube, and an inner tube intermittently for disposing the blade in the outer tube (for example, Japanese Patent Laid-Open No. 2001-2001). -See 187313).

  Furthermore, there is a mixed fluid conduit in which a plurality of annular sleeves and a plurality of types of stirring blades of the same length are arranged concentrically in the mixing portion inside the main pipe. (For example, see JP-A-11-304067 and JP-A-10-339396.) This mixed fluid conduit is used as a static fluid mixer by rotating, merging, reversing, and dividing in the right and left directions. It is a technique that does not fall within the category of the basic mixing principle, and is a technique that is used for mixing gases by the generation of turbulent flow by a stirring blade under a gas flow rate of 20 to 34 (m / sec). In addition, in the plurality of simply twisted stirring blades arranged inside the short pipe, the adjacent stirring blades are not arranged at equal intervals at the same interval. Is difficult to produce and has the disadvantage of causing problems in quality uniformity and reaction homogeneity. Furthermore, for the manufacture of a stirring blade having a twist, only a casting method can be adopted for reasons of processing, particularly in the case of a metal. This makes the production costs expensive. Further, the thickness of the stirring blade is increased. Furthermore, twisting of the stirring blade by forging, which is one of the inexpensive manufacturing methods, causes cracks in the plate material of the metal material, making it difficult to manufacture the stirring blade, especially with a large diameter (diameter 1 m or more). Manufacture is impossible due to cracks caused by expansion and contraction of the plate material.

  Further, an exhaust gas elimination system using a static mixer (for example, see Japanese Patent Application Laid-Open No. 7-88319) has been reported.

  In the conventional mixing element, as the diameter of the passage tube through which the fluid flows increases, it is necessary to increase the cross-sectional area, that is, the diameter of the opening (center portion) in proportion to the diameter of the passage tube due to difficulty in manufacturing. There is. For this reason, the packing density is low, and there is a drawback that the mixing / stirring effect is reduced because the fluid flows directly through the opening, that is, short-circuits. Further, in order to compensate for the decrease in the mixing / stirring effect, it is necessary to arrange a large number of mixing elements in the longitudinal axis direction, resulting in high equipment costs and high pressure loss.

  Furthermore, for example, when a mixing element having a large aperture (diameter of 1 m or more) with a rotation angle of 180 ° is manufactured by a forging method, a crack occurs in the plate material, which makes it impossible to manufacture. Also, the mold cost is expensive. In addition, the mixing / stirring efficiency has a disadvantage that the diameter of the opening is enlarged, so that the fluid is short-circuited in the opening and greatly reduced. Furthermore, the use of a mixing element as a packing in a distillation column of the prior art is limited by the size of the manhole where the operator enters and exits due to the large size of the mixing element, so that replacement work and arrangement are impossible. It is.

  Furthermore, the mixing element of the present invention can be manufactured at a small rotation angle (for example, about 10 °), and can be used as a packing material in a prior art distillation column. As a result of this improvement, the production capacity is easily improved with high performance.

    JP-A-58-128134     JP-A-5-168882     Japanese Patent Laid-Open No. 7-80279     Japanese Patent Laid-Open No. 7-284642     JP 2001-170476 A     JP 2001-187313 A     Japanese Patent Application Laid-Open No. 11-304067     JP 10-339396 A     JP-A-7-88319   European Patent 0678329   US Pat. No. 5,605,400   US Pat. No. 6,431,528   S. J. et al. Chen, et al. “Static Mixing Handbook”, Institute for Chemical Research, published in June 1973   Matsumura Teruichiro, Morishima Yasushi, et al. "Static Mixer-Fundamentals and Applications-" Nikkan Kogyo Shimbun, published September 30, 1981

  In the conventional mixing element and the static fluid mixer using the mixing element, the diameter of the axial center portion increases in proportion to the increase in the diameter of the mixing element because of the production of the blade body by an inexpensive manufacturing method. For this reason, the mixing / stirring efficiency due to the decrease in packing density is decreased, so that it is necessary to increase the mixing / stirring time between the fluids. For this reason, the cost of equipment such as an absorption tower and a distillation tower becomes expensive. In addition, as the diameter becomes larger, it becomes difficult to manufacture and assemble, and the mold cost becomes higher. Furthermore, it has been impossible to use a conventional mixing element as a packing in a distillation column of the prior art because of the size and performance of members such as passage tubes and blades that form the mixing element. Further, it has been impossible to use a conventional mixing element as a packing material in a conventional absorption tower for treating a large amount of air.

  Furthermore, a distillation column using a packing of the prior art is required to have a large gas-liquid contact interface area, a high-performance liquid distribution function, and a wide operating range under a low pressure loss (for example, Japanese Patent Laid-Open No. Hei 7). (See -080279). In addition, as the capacity of exhaust gas generated from incinerators, ships, power plants, rotary kilns, etc. has increased, the performance of absorption towers used in exhaust gas treatment equipment has been improved, and space saving has been achieved. There are demands for energy savings and lower prices.

The mixing element of the present invention for solving the above-described problems includes a cylindrical passage tube through which a fluid flows, and a spiral-shaped second tube that rotates clockwise (clockwise) or counterclockwise (counterclockwise) in the passage tube. A single blade body is provided, a first inner tube is disposed at the axial center of the first blade body, and a clockwise or counterclockwise spiral second blade body is provided in the first inner tube. A second inner tube is disposed at the axial center of the second blade body, and the length of the passage tube in the longitudinal axis direction is equal to or slightly longer than the first blade body, and the second blade body The length in the longitudinal axis direction is substantially equal to or shorter than the length in the longitudinal axis direction of the first blade body, and the first inner tube and the second inner tube are formed of a porous body. It is characterized by. According to the present invention, there is provided a mixing element with high mixing efficiency, improved manufacturing simplicity and low manufacturing costs. Further, the present invention provides a mixing element that can be applied to a large-diameter (1 m or more) distillation tower type and absorption tower type gas-liquid contact device.

According to the mixing element of the present invention, the mixing / stirring efficiency is improved and the gas-liquid contact time is shortened by improving the packing density (m ² / m ³ ). In addition, manufacturing costs are reduced by facilitating manufacturing. Furthermore, the production of large-diameter distillation towers and absorption towers is simplified. Furthermore, the production cost can be reduced by improving the performance and energy saving by exchanging with the packing used in the existing distillation column and absorption column. The packing density used here (hereinafter the same) indicates the total surface area (m ² ) of the blades per unit volume (m ³ ) of the mixing element. Specifically, the total surface area (m ² ) of the first blade body and the second blade body per unit volume (m ³ ) in the passage pipe is shown.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a 90 ° clockwise rotating mixing element according to a first embodiment of the present invention, FIG. 2 is a bottom view of the 90 ° clockwise rotating mixing element according to the first embodiment, and FIG. 3 is a second embodiment. FIG. 4 is a partially enlarged perspective view of a 90 ° clockwise rotating mixing element according to an example, and FIG. 4 shows a mixing element comprising a right rotating first blade body and a left rotating second blade body according to a third embodiment of the present invention. Similarly, FIG. 5 is a perspective view of a left-rotation type mixing element according to the fourth embodiment, and FIG. 6 is a left-rotation type first blade body and a right-rotation type first according to the fifth embodiment. 7 is a perspective view of a mixing element composed of two blades, FIG. 7 is an explanatory view showing a cross section in the diametrical direction of the right-rotating mixing element according to the first embodiment of the present invention, and FIG. 8 is similarly related to the sixth embodiment. Perspective view and diagram of 15 ° right-handed mixing element FIG. 10 is a perspective view of a mixing element in which four 15 ° right-turning mixing elements according to a sixth embodiment of the present invention are arranged, and FIG. 10 is a drawing in which three stages of 30 ° right-turning mixing elements in the seventh embodiment are similarly arranged. FIG. 11 is a perspective view of the mixing element in which three 60 ° right-turning mixing elements of the eighth embodiment are similarly arranged, and FIG. 12 is a 90 ° right-turning mixing element of the ninth embodiment. FIG. 13 is a schematic side sectional view of the static fluid mixer according to the first embodiment using the mixing element of the present invention, and FIG. 14 uses the mixing element of the present invention. FIG. 15 is a schematic side partial sectional view of a static fluid mixer according to a third embodiment. FIG. 15 is a schematic side sectional view of a static fluid mixer according to a third embodiment. 16 is a schematic longitudinal sectional perspective view of the static fluid mixer according to the embodiment of the present invention shown in FIG. 13, and FIG. 17 is an application example when the mixing element of the present invention is applied to a distillation column type gas-liquid contact device. FIG. 18 is a schematic partial side sectional view showing an application example in the case where it is similarly applied to an absorption tower type gas-liquid contact device.

  FIG. 1 is a perspective view of a 90 ° clockwise rotating (clockwise) mixing element according to a first embodiment of the present invention, and FIG. 2 is a bottom view of the mixing element. The mixing element 1 includes a cylindrical passage tube 2 and a plurality of spiral right-turning first blade bodies 3 provided in the passage tube 2. The first blade body 3 is formed of a porous body having a large number of perforated holes 4. A cylindrical first inner tube 5 is disposed inside the first blade body 3. The first inner tube 5 is provided in the connecting portion of the first blade body 3 by a necessary length in the axial direction (longitudinal axial direction), and is not disposed elsewhere. The first inner tube 5 has a plurality of spiral right-turning second blades 6, and the blades 6 are formed of a porous body having a number of perforations 7. A cylindrical second inner tube 8 is arranged inside the second blade body 6 to form an opening 9. The second inner tube 8 is installed to increase the mechanical strength against the torsional stress of the second blade body 6. The second inner tube 8 is provided for the necessary length at the connecting portion of the second blade body 6 as necessary, and is not disposed elsewhere. One end portion of the first blade body 3 is connected to the outer peripheral surface of the first inner tube 5, and the other end portion is spirally twisted in a clockwise direction (clockwise rotation) toward the inner peripheral surface of the passage tube 2. The passage pipe 2 is connected to the inner peripheral surface. The length of the passage tube 2 in the longitudinal axis direction is equal to or slightly longer than that of the first blade body 3.

  One end of the second blade body 6 is connected to the outer peripheral surface of the second inner tube 8, and the second blade body 6 is spirally twisted in the clockwise direction (right rotation) toward the inner surface of the first inner tube 5. The end portion is connected to the inner peripheral surface of the first inner tube 5. Since the center portion of the second inner tube 8 is opened, the second blade body 6 does not exist in the axial center portion of the second inner tube 8 and this portion is missing. Thereby, as shown in FIGS. 1 and 2, an opening 9 in which the blade body 6 does not exist is formed in the axial center portion of the second inner tube 8. The length of the second blade body 6 in the longitudinal axis direction is substantially equal to or shorter than the similar length of the first blade body 3. Preferably, it is in the range of about 10 to about 60% of the length of the first blade body 3 in the axial direction.

The rotation angle (torsion angle) of the blade bodies 3 and 6 is not limited to 90 °, but is preferably in the range of about 5 ° to 270 °, more preferably about 10 ° to 180 °, depending on the inner diameter of the mixing element 1. It is. The axial length of the blade bodies 3 and 6 is preferably in the range of 2.5 to 100%, more preferably 2.5 to 50% with respect to the diameters of the passage tube 2 and the inner tube 5. It is a range. Further, the number of the inner cylindrical tubes is arranged as in the third, fourth, fifth, and nth inner cylindrical tubes according to the inner diameter of the mixing element 1 so that the diameter of the opening 9 is the minimum diameter, for example, 50 mm or less. At least one or more can be used by appropriately increasing or decreasing. Further, the number (number) of the blade bodies 3 and 6 is not limited to 12 and 6, but can be appropriately increased or decreased. The number of second blades 6 can be increased easily by using a rotation angle of 30 ° or less, for example, so that the number of second blades 6 can be easily increased and the mixing efficiency is improved. In addition, the blade member 6 can be easily processed into a spiral shape. Furthermore, the arrangement positions in the radial direction of the blade bodies 3 and 6 are arranged at equal intervals in the passage pipe 2 and the inner cylinder pipe 5 and joined. Thereby, homogenization of the fluid mixing is achieved. The filling density ^(m 2 / ^{m 3),} for example in the case of an aperture ratio of 10% of the pores of the sail body 3 and 6, is preferably in the range of 10 to 100 m ² / ^{m 3,} more preferably 20~60m ² / m is in the range of ^3. However, it is not limited to this range, and it is appropriately selected and used according to the density, viscosity, interfacial tension, diffusion coefficient, flow rate, Reynolds number, fluid type, etc. of the fluid.

  FIG. 3 is a partially enlarged perspective view of a 90 ° clockwise rotating mixing element showing a second embodiment according to the present invention.

  Similar to the mixing element 1 shown in FIG. 1 and FIG. 2, the mixing element 10 includes a cylindrical passage tube 11 and a plurality of spiral right-turning first blades 12 provided in the passage tube 11. have. The blade body 12 is formed of a porous body having a large number of perforated holes 13. A cylindrical first inner tube 14 is disposed inside the blade body 12, and one end portion of the blade body 12 is connected to the outer peripheral portion of the inner tube 14. The inner tube 14 is formed of a porous body having a large number of perforated holes 15. The inner cylindrical tube 14 has a plurality of spiral right-turning second blade bodies 16, and the blade bodies 16 are formed of a porous body having a number of perforated holes 17. A cylindrical second inner tube 18 is disposed inside the blade body 16. The inner tube 18 is formed of a porous body having a number of perforations 19. The length of the passage tube 11 in the longitudinal axis direction is equal to or slightly longer than that of the first blade body 12.

  By forming the first inner tube 14 and the second inner tube 18 with a porous body having a large number of perforations 15 and 19, the axial direction (longitudinal axis direction) in the mixing element 10 flows. The mixing effect and homogenization of the fluid are further improved. The shapes of the holes 15 and 19 are appropriately selected and used as necessary, such as a triangular shape, a square shape, an elliptical shape, and a slit shape. The aperture ratio of the holes 15 and 19 is appropriately selected and used depending on the use conditions in the range of about 5% to 95%. In addition, the arrangement positions in the radial direction of the blade bodies 12 and 16 are joined to the passage pipe 11 and the inner cylinder pipe 14 so as to be arranged at almost equal intervals, similarly to the mixing element 1.

  FIG. 4 is a perspective view of a mixing element showing a third embodiment according to the present invention. The mixing element 20 includes a cylindrical passage pipe 21 and a plurality of spiral right-turning first blade bodies 22 provided in the passage pipe 21. The blade body 22 is formed of a porous body having a number of perforations 23. A cylindrical first inner tube 24 is disposed inside the blade body 22. The inner cylindrical tube 24 has a plurality of spiral left-rotating second blade bodies 25, and the blade bodies 25 are formed of a porous body having a number of perforated holes 26. A cylindrical second inner tube 27 is disposed inside the blade body 25 to form an opening 28. The length of the passage tube 21 in the longitudinal axis direction is equal to or slightly longer than that of the first blade body 22.

  The mixing element 20 includes a first blade body 22 that rotates clockwise (clockwise) and a second blade body 25 that rotates left (counterclockwise) in the passage tube 21. As a result, the right-handed and left-handed fluids flowing through the mixing element 20 generate strong shear stress due to opposite vortex flows in the radial direction in the mixing element 20, for example, in the range of a gas flow rate of 1 to 15 m / s. However, the mixing efficiency is further improved. In addition, mixing efficiency and homogenization further improve by forming the inner cylinder pipe 24 and the inner cylinder pipe 27 with a porous body.

  FIG. 5 is a perspective view of a 90 ° counterclockwise (counterclockwise) mixing element showing a fourth embodiment according to the present invention. The mixing element 29 has a cylindrical passage tube 30 and a plurality of spiral left-turning first blade bodies 31 provided in the passage tube 30. The first blade body 31 is formed of a porous body having a large number of perforated holes 32. A cylindrical first inner tube 33 is disposed inside the first blade body 31. The first inner tube 33 is provided at the connecting portion of the first blade body 31 by a necessary length in the axial direction (longitudinal axial direction), and is not disposed elsewhere. The first inner tube 33 has a plurality of spiral second rotation type second blades 34, and the blades 34 are formed of a porous body having a number of perforations 35. A cylindrical second inner tube 36 is disposed inside the second blade body 34 to form an opening 37. Similarly to the above, the second inner tube 36 is installed to increase the mechanical strength against the torsional stress of the second blade body 34. The second inner tube 36 is provided in the connection portion of the second blade body 34 as necessary, as required, and is not disposed elsewhere. One end of the first blade body 31 is connected to the outer peripheral surface of the first inner tube 33, and the other end is spirally twisted counterclockwise (counterclockwise) toward the inner peripheral surface of the passage tube 30. Is connected to the inner peripheral surface of the passage tube 30. The length of the passage tube 30 in the longitudinal axis direction is equal to or slightly longer than that of the first blade body 31.

  One end of the second blade body 34 is connected to the outer peripheral surface of the second inner cylindrical tube 36, and is twisted spirally in the counterclockwise direction (counterclockwise rotation) toward the inner peripheral surface of the first inner cylindrical tube 33. The other end is connected to the inner peripheral surface of the first inner tube 33. Since the center portion of the second inner tube 36 is opened, the second blade body 34 does not exist in the axial center of the second inner tube 36 and this portion is missing.

  Similarly to the above, the rotation angle (twisting angle) of the blades 31 and 34 is not limited to 90 °, but is preferably in the range of about 5 ° to 270 °, more preferably about 10 according to the inner diameter of the mixing element 29. It is in the range of ° to 180 °. Further, the number of the inner tube tubes can be appropriately increased or decreased by at least one according to the inner diameter of the mixing element 29. Further, the number of blade bodies 31 and 34 is not limited to 12 and 6, but can be appropriately increased or decreased within a manufacturable range according to the required packing density.

  FIG. 6 is a perspective view of a mixing element showing a fifth embodiment according to the present invention. The mixing element 38 includes a cylindrical passage tube 39 and a plurality of spiral left-rotating first blade bodies 40 provided in the passage tube 39. The blade body 40 is formed of a porous body having a large number of perforated holes 41. A cylindrical first inner tube 42 is disposed inside the blade body 40. The inner cylindrical tube 42 has a plurality of spiral right-turning second blade bodies 43 and is formed of a porous body having a large number of perforated holes 44. A cylindrical second inner tube 45 is disposed inside the blade body 43 to form an opening 46. The length of the passage tube 39 in the longitudinal axis direction is equal to or slightly longer than that of the first blade body 40.

  The mixing element 38 is provided with a blade body 40 that rotates counterclockwise (counterclockwise) and a blade body 43 that rotates clockwise (clockwise) in the passage pipe 39. As a result, the right-handed and left-handed fluids flowing through the mixing element 38 generate strong shearing stress due to the opposite vortex flows in the radial direction in the mixing element 38, and the mixing efficiency is further improved. The mixing efficiency is further improved by forming the inner tube 42 and the inner tube 45 from a porous body.

  FIG. 7 is an explanatory diagram relating to dimensions (lengths) of the diameters of the passage tube and the inner tube in the mixing element according to the present invention. The mixing element 47 is composed of a passage pipe 48, a first blade body 49, a first inner cylinder pipe 50, a second blade body 51, and a second inner cylinder pipe 52 as described in FIGS. An opening 53 is formed. The dimensional ratio of the diameter of the passage pipe and the inner cylinder pipe in the mixing element 47 is such that the diameter of the passage pipe 48 is φD and the diameter of the inner cylinder pipe 50 is φd, and φd ranges from about 5% to 95% of φD. preferable. More preferably, it is in the range of 10% to 60%. The diameter of the opening 53 is preferably a small diameter, for example, 50 mm or less, and is in the range of about 5% to 50% of the diameter φd of the first inner tube 50. More preferably, it is in the range of about 10% to 30%. The dimensional ratio between the passage tube and the inner tube is appropriately selected and used according to the size of the passage tube, ease of manufacture, and mixing efficiency. Further, the inner tube is not limited to the first inner tube and the second inner tube, and the inner tube may be, for example, the third, fourth, fifth inner tube, the nth inner tube, and the center portion of the sequential passage tube. In the same manner, a plurality of blades are sequentially arranged in each inner tube and used as appropriate. The rotation angle of the second blade body 51 is formed at a rotation angle substantially equal to or smaller than the rotation angle of the first blade body 49. Thereby, manufacture becomes easy, and a packing density improves and mixing efficiency improves more.

  FIG. 8 is a perspective view of a 15 ° clockwise rotating (clockwise) mixing element showing a sixth embodiment according to the present invention. The mixing element 54 a has a cylindrical passage pipe 55 and a plurality of spiral right-turning first blade bodies 56 provided in the passage pipe 55. The blade body 56 is formed of a porous body having a large number of perforated holes 57. A cylindrical first inner tube 58 is disposed inside the blade body 56. The inner tube 58 is provided in the connecting portion of the first blade body 56 by a necessary length in the axial direction (longitudinal axial direction), and is not disposed elsewhere. The inner tube 58 is formed of a porous body having a plurality of spiral right-turning second blade bodies 59 and a large number of perforated holes 60. A cylindrical second inner tube 61 is disposed inside the blade body 59 to form an opening 62. The inner tube 61 is installed to increase the mechanical strength against the torsional stress of the blade body 59. The second inner tube 61 is provided for the necessary length at the connecting portion of the second blade body 59 as necessary, and is not disposed elsewhere. One end of the first blade 56 is connected to the outer peripheral surface of the first inner tube 58, and the first blade 56 is spirally twisted about 15 ° clockwise (clockwise) toward the inner peripheral surface of the passage tube 55. The end is connected to the inner peripheral surface of the passage pipe 55. The length in the longitudinal axis direction of the passage tube 55 is formed to be equal to or slightly longer than the first blade body 56.

  One end of the second blade body 59 is connected to the outer peripheral surface of the second inner cylindrical tube 61, and the second blade body 59 is spirally twisted in the clockwise direction (clockwise rotation) toward the inner peripheral surface of the first inner cylindrical tube 58. The end is connected to the inner peripheral surface of the first inner tube 58. Since the center portion of the second inner tube 61 is opened, the second blade body 59 does not exist in the axial center of the second inner tube 61 and this portion is missing. Thereby, the opening part 62 in which a blade | wing body does not exist in the axial center part of the 2nd inner cylinder pipe 61 is formed. The mixing elements 54b, 54c and 54d are formed in the same manner as the mixing element 54a.

  In the mixing element 54, by making the rotation angle of the first blade body 56 and the second blade body 59 approximately 15 °, the manufacture of the blade bodies 56 and 59 is simplified, and the number of the blade bodies 56 and 59 installed is easy. The mixing efficiency is further improved by increasing the packing density. In addition, production of a large diameter (diameter 1000 mm or more) is simplified, and the production cost is reduced due to the reduction in mold cost and the ease of production. Furthermore, it is possible to replace the packing used in the existing distillation tower and absorption tower, and the assembly and installation work of the mixing element 54 in the field and in these towers can be easily performed. In the method of manufacturing the mixing element 54, the passage pipe 55, the blade bodies 56 and 59, and the inner cylinder pipes 58 and 61 are manufactured separately. Further, the passage pipe 55 and the inner cylindrical pipes 58 and 61 are manufactured by a plurality of members divided into at least two or more in the longitudinal axis direction, and the plurality of divided members are connected to form the cylindrical passage pipe 55 and The inner tube 58, 61 may be formed. Similarly, the blade bodies 56 and 59 may be divided into at least two in the longitudinal axis direction or the radial direction, and the plurality of divided members may be connected to form the spiral blade bodies 56 and 59. In addition, the mixing element 54 is easily manufactured by connecting the passage pipe 55, the inner cylindrical pipes 58 and 61, and the blade bodies 56 and 59 by means such as welding, adhesion, welding, and locking.

  In the mixing element 63 shown in FIG. 9, the 15 ° right-rotating type mixing elements 54a, 54b, 54c, 54d are arranged in four stages, that is, four mixing elements 54a, 54b, 54c, 54d are arranged in series. The body 56 is connected so that the rotation angle (torsion angle) of the body 56 is about 60 ° in total. That is, the mixing element 63 having a blade body of 15 ° + 15 ° + 15 ° + 15 ° = 60 ° is formed by connecting the edges of the adjacent first blade bodies 56. That is, the mixing element 63 having a rotation angle of 60 ° is easily formed.

  By arranging the required number of mixing elements 54 in this way, a mixing element having an arbitrary rotation angle such as about 180 °, about 270 °, or about 360 ° can be easily manufactured.

  In addition, you may arrange | position and use in arbitrary positions, without being limited to connecting the edge of the adjacent blade | wing body 56 in a predetermined position. Further, the mixing element is not limited to the right rotation type blade body, and the rotation element of the blade body forming the mixing elements 10, 20, 29, and 38 shown in FIGS. Combinations are appropriately selected and used as necessary.

  FIG. 10 is a perspective view of a 30 ° clockwise rotating (clockwise) mixing element showing a seventh embodiment according to the present invention. Similar to the mixing element shown in FIG. 8, the mixing element 64 has a cylindrical passage pipe 65 and a plurality of spiral right-turning first blade bodies 66 provided in the passage pipe 65. Yes. The first blade body 66 is formed of a porous body having a large number of perforated holes 67. A cylindrical first inner tube 68 is disposed inside the first blade body 66. The inner tube 68 is provided in the connecting portion of the blade body 66 by a necessary length in the longitudinal axis direction, and is not disposed elsewhere. The inner tube 68 is formed of a porous body having a plurality of spiral right-turning second blade bodies 69 and a plurality of perforated holes 70. A cylindrical second inner tube 71 is arranged inside the blade body 69 to form an opening 72. The inner tube 71 is installed to increase the mechanical strength against the torsional stress of the blade body 69. The inner tube 71 is provided for the necessary length at the connecting portion of the blade body 69 as required, and is not disposed elsewhere.

  The following is the same as the mixing element shown in FIG.

  The mixing element 64 shown in FIG. 10 is connected so that the rotation angle of the blade body 66 is about 90 ° in total by arranging three stages of about 30 ° right rotation type mixing elements 64a, 64b and 64c. Similar to the mixing element 63 shown in FIG. 9, a mixing element 64 having a blade body of 30 ° + 30 ° + 30 ° = 90 ° is easily formed.

  FIG. 11 is a perspective view of a 60 ° clockwise rotating (clockwise) mixing element according to an eighth embodiment of the present invention. The mixing element 73 has a cylindrical passage pipe 74 and a plurality of spiral right-turning first blade bodies 75 provided in the passage pipe 74. The blade body 75 is formed of a porous body having a large number of perforated holes 76. A cylindrical first inner tube 77 is disposed inside the blade body 75. The inner tube 77 is provided in the connecting portion of the blade body 75 by a necessary length in the axial direction (longitudinal axial direction), and is not disposed elsewhere. The inner tube 77 has a plurality of spiral right-turning second blades 78 and is formed of a porous body having a number of perforations 79. A cylindrical second inner tube 80 is disposed inside the blade body 78 to form an opening 81. The inner tube 80 is installed to increase the mechanical strength against the torsional stress of the blade body 78. The inner tube 80 is provided as much as necessary at the connecting portion of the second blade body 78 as necessary, and is not disposed elsewhere. The length of the second blade body 78 in the longitudinal axis direction is preferably substantially equal to the length of the first blade body 75 in the longitudinal axis direction or 50% or less. That is, it is preferable to form at least two second blade bodies 78 with respect to one first blade body 75.

  The following is the same as the mixing element shown in FIG.

  The mixing element 73 shown in FIG. 11 is connected so that the rotation angle of the blade body 75 is about 180 ° in total by arranging about 60 ° clockwise rotation mixing elements 73a, 73b and 73c in three stages. Similar to the mixing element 63 shown in FIG. 9, the mixing element 73 having a blade body of 60 ° + 60 ° + 60 ° = 180 ° is easily formed.

  FIG. 12 is a perspective view of a 90 ° clockwise rotating (clockwise) mixing element showing a ninth embodiment according to the present invention. The mixing element 82 includes a cylindrical passage pipe 83 and a plurality of spiral right-turning first blade bodies 84 provided in the passage pipe 83. The blade body 84 is formed of a porous body having a large number of perforated holes 85. A cylindrical first inner tube 86 is disposed inside the blade body 84. The inner tube 86 is provided at the connecting portion of the blade body 84 by a necessary length in the axial direction (longitudinal axis direction), and is not disposed elsewhere. The inner cylindrical tube 86 is formed of a porous body having a plurality of spiral right-turning second blade bodies 87 and a plurality of perforated holes 88. A cylindrical second inner tube 89 is disposed inside the blade body 87 to form an opening 90. The inner tube 89 is installed to increase the mechanical strength against the torsional stress of the blade body 87. The inner tube 89 is provided for the necessary length at the connecting portion of the blade body 87 as required, and is not disposed elsewhere. As in the eighth embodiment, it is preferable that at least two second blades 87 are formed for one first blade 84.

  The following is the same as the mixing element shown in FIG.

  The mixing element 82 shown in FIG. 12 is connected so that the rotation angle of the blade body 84 is about 270 ° in total by arranging three stages of about 90 ° right rotation type mixing elements 82a, 82b and 82c. Similar to the mixing element 63 shown in FIG. 9, a mixing element 82 having a blade body of 90 ° + 90 ° + 90 ° = 270 ° is easily formed.

  FIG. 13 shows a static fluid mixer in which a right-turning mixing element according to the first embodiment using the mixing element of the present invention and a left-turning mixing element according to the fourth embodiment are connected in series through spacers. It is a schematic sectional side view. A cylindrical static fluid mixer 91 includes a clockwise rotating mixing element 93 and a left rotating mixing element 94 in a cylindrical casing 92 alternately with spacers 95 having the same diameter as the mixing elements 93 and 94. It is arranged and formed. In addition, two right rotation type second blade bodies 98 are arranged over the entire length of the right rotation type first blade body 96. Further, the mixing elements 93 and 94 are formed by disposing the first inner tube 97 and the second inner tube 99 shown in FIGS. 1 and 5, respectively. It is preferable to arrange a plurality of inner tube tubes and blades and to form the opening 100 with a small diameter (diameter 50 mm or less). Note that the static fluid mixer may be formed by alternately arranging the mixing elements 93 and 94 in the casing 92 without arranging the cylindrical spacer 95. Alternatively, the ends of the mixing elements 93 and 94 may be joined to form a static fluid mixer. Note that the length of the second blade body 98 in the longitudinal axis direction is substantially half that of the first blade body 96. The second blade body 98 has a predetermined rotation angle and is formed at a rotation angle smaller than the rotation angle of the first blade body 96. For example, the rotation angle of the second blade body 98 is about 45 ° with respect to the rotation angle of the first blade body 96 of about 90 °.

  While the two types of fluids FA and FB flow through the static fluid mixer 91 configured as described above, a part of the fluid spirally rotates along the rotation angle of the blade body and turns clockwise. Part of the fluid is sheared by flowing through the hole in the blade body, and part of the fluid is sheared by flowing through the hole in the inner tube, and these fluids merge and are further reversed and divided. . In this way, rotation, passage, shearing, merging, inversion, and division are continuously repeated, so that the two types of fluids FA and FB are homogeneously mixed.

  FIG. 14 is a schematic sectional side view of a static type fluid mixer in which at least one clockwise rotating mixing element according to the second embodiment shown in FIG. 3 using the mixing element of the present invention is arranged. The cylindrical static fluid mixer 101 is formed by disposing a right-rotating mixing element 103 and a cylindrical spacer 110 having the same diameter as the mixing element 103 in a cylindrical casing 102. The right rotation type first blade body 104 provided in the mixing element 103 is the same as the mixing element 93 shown in FIG. 13, but the right rotation type second blade body 106 is the same as the first inner tube 105. Two pieces are arranged through a space 109 in a portion that requires a length in the axial direction (longitudinal axial direction), and a mixing element 103 is formed having a second inner tube 107 and an opening 108. Yes. Thus, by forming the space portion 109 in which the second blade body 106 is missing in the first inner tube 105, the mixing efficiency is further improved due to the effect of fluid merging in the radial direction. Note that the second blade 106 is not limited to the right rotation type, and the right and left rotation types may be alternately arranged to form the static fluid mixer 101.

  FIG. 15 is a schematic partial side sectional view of a static fluid mixer in which at least one clockwise rotating mixing element according to the third embodiment shown in FIG. 4 using the mixing element of the present invention is arranged. The cylindrical static fluid mixer 111 is formed by disposing a right rotation type mixing element 113 and a cylindrical spacer 120 having the same diameter as the mixing element 113 in a cylindrical casing 112. The right rotation type first blade body 114 provided in the mixing element 113 is the same as the mixing element 93 shown in FIG. 13, but the second blade provided in the first inner tube 115. The body 116 is formed as a left rotation type. Similarly to the mixing element 103 shown in FIG. 14, two left-rotating second blade bodies 116 are arranged via the space 119 to form the mixing element 113. Further, the mixing element 113 is formed having the second inner tube 117 and the opening 118 as in FIG. The rotation angle of the second blade body 116 is formed at a rotation angle smaller than the rotation angle of the first blade body 114.

  The static fluid mixer 111 configured as described above further improves the mixing efficiency due to the generation of the swirling flow that is counterclockwise and counterclockwise. Note that the second blade body 116 is not limited to the left rotation type, and the left and right rotation types may be alternately arranged to form the static fluid mixer 111.

  FIG. 16 is a schematic longitudinal sectional perspective view in the axial direction (longitudinal axial direction) of the static fluid mixer according to the embodiment of the present invention shown in FIG. 13. The cylindrical static fluid mixer 121 is formed by alternately arranging a cylindrical right rotation type mixing element 122 and a cylindrical left rotation type mixing element 123 via a cylindrical spacer 124.

  The right-rotating mixing element 122 has a cylindrical passage pipe 125 and a plurality of spiral right-turning first blade bodies 126 provided in the passage pipe 125. The blade body 126 is formed of a porous body having a large number of perforations 127. A cylindrical first inner tube 128 having a perforation hole on the inner side (center portion) of the blade body 126 is disposed over the entire length of the first blade body 126. The inner cylindrical tube 128 has a plurality of spiral right-turning second blade bodies 129 and is formed of a porous body having a large number of perforated holes 130. A cylindrical second inner tube 131 is arranged on the inner side (center) of the blade body 129 having the predetermined rotation angle to form an opening 133. Like the first inner tube 128, the inner tube 131 has a large number of perforations 132. One end of a cylindrical spacer 124 having the same diameter as the mixing element 122 is joined to the end edge of the mixing element 122. The length of the spacer 124 in the axial direction (longitudinal axial direction) is preferably in the range of 0.1 to 10 times the total length of the mixing element 122. More preferably, it is in the range of 0.2 to 5 times. The shape of the cross-sectional area in the axial direction of the spacer 124 is not limited to a cylindrical shape having the same diameter, and may be an irregular cone shape. Thereby, the fluid flowing through the inner wall portion of the passage pipe 125 is moved to the center portion.

  One end of the left rotation type mixing element 123 is joined to the other end of the spacer 124. The left rotation type mixing element 123, like the right rotation type mixing element 122, will not be described in detail, but a cylindrical passage tube 134 and a plurality of spiral tubes provided in the passage tube 134 are provided. Left-rotation type first blade body 135. The blade body 135 is formed of a porous body having a large number of perforated holes 136. A cylindrical first inner tube 137 having a perforated hole is arranged over the entire length of the first blade body 135 in the inside (center portion) of the blade body 135 having the predetermined rotation angle, as in FIG. The inner cylindrical tube 137 has a plurality of spiral left-rotating second blade bodies 138 and is formed of a porous body having a number of perforations. A cylindrical second inner tube is disposed inside (center part) of the blade body 138 to form an opening 133. Like the first inner tube 137, this inner tube is formed with a number of perforations. The other end of the left rotation type mixing element 123 is joined to the same spacer 124 as described above, and the same right rotation type mixing element 122 is joined via the spacer 124 so that the static fluid mixer 121 is connected. Forming. The static fluid mixer 121 includes two right-rotating mixing elements 122 and one left-rotating mixing element 123. However, the present invention is not limited to this, and at least one of the mixing elements is not limited thereto. May be used to form a static fluid mixer. The number of the mixing elements arranged, the rotation angle, the direction of rotation, the number of blades arranged, etc. are appropriately selected and used according to the application and use conditions.

Application example 1

  FIG. 17 is a schematic partial longitudinal sectional view showing an application example when the mixing element according to the embodiment of the present invention is applied to a distillation column type gas-liquid contact apparatus. The distillation tower 139 is formed by arranging a cylindrical casing 140 and four stages of clockwise rotating mixing elements 141a, 141b, 141c, and 141d in the casing 140. The mixing elements 141 a, 141 b, 141 c, and 141 d are locked at predetermined positions by a mixing element support 142 provided in the casing 140. The manhole 143 is formed in the casing 140 with a structure and dimensions that allow the members of the mixing element 141 and the operator to carry in and out. Note that the high-efficiency distillation column 139 may be formed by alternately arranging right-rotating mixing elements and left-rotating mixing elements in a column (not shown). In addition, the distillation column 139 may be formed by alternately arranging at least one right rotation type or left rotation type mixing element.

  In the distillation column 139 configured as described above, the gas (FA) rising and the liquid (FB) rising in the distillation column 139 are passed counter-currently through the mixing element 141, and the gas and the liquid are stirred. Mixed and gas-liquid is in full contact. By applying this distillation column 139 that prevents drift and does not require a liquid redistributor to flash distillation, steam distillation, etc., separation, purification, and recovery operations of foreign substances in the liquid can be performed.

  By applying the mixing element according to the present invention as a packing in the distillation column, the gas velocity in the distillation column can be processed in the range of 1.5 to 5 times that of the distillation column of the prior art, and the column diameter Will be smaller and the equipment cost will be lower. In addition, the gas-liquid effective contact area is improved by improving the packing density, the tower height is lowered, operation with low pressure loss is possible, and the amount of supply steam, the amount of gas, etc. are reduced. Furthermore, the operation range is wide with respect to fluctuations in the liquid gas ratio, and operation management becomes easy. Furthermore, by replacing the packing used in the prior art distillation column with the mixing element of the present invention, production capacity and maintenance management are easily improved. Replacement work and installation work with the mixing element of the present invention can be easily performed through the manhole of the existing distillation tower. Furthermore, compared to a distillation column using a conventional static mixer, the diameter of the opening of the mixing element of the present invention can be minimized (for example, 50 mm or less), the packing density can be improved, Short circuit is reduced and gas-liquid contact efficiency is further improved. Further, by reducing the rotation angle of the blade (for example, 15 ° or less), the mixing element of the present invention can be easily manufactured, and the mixing element of the present invention can be installed and installed in a narrow distillation column. Become. Furthermore, it becomes easy to manufacture a distillation tower having a large diameter (diameter of 1 m or more), and a large capacity treatment is possible. Furthermore, the maintenance cost is reduced by preventing clogging due to adhesion and growth of the generated solid material.

Application example 2

  FIG. 18 is a schematic partial longitudinal sectional view showing an application example when the mixing element according to the embodiment of the present invention is applied to an absorption tower type gas-liquid contact device. The absorption tower 144 is formed by arranging a cylindrical casing 145 and four stages of clockwise rotating mixing elements 146a, 146b, 146c, and 146d in the casing 145. The mixing elements 146a, 146b, 146c, and 146d are locked in place by a mixing element support 147 provided in the casing 145. The manhole 148 is formed in the casing 145 with a structure and dimensions that allow a member of the mixing element 146 to be carried in and out and a worker to enter and exit. Similarly to the distillation column, the absorption column 144 may be formed by alternately arranging a right rotation type mixing element and a left rotation type mixing element in a column (not shown). Further, the absorption tower 144 may be formed by alternately arranging at least one right rotation type or left rotation type mixing element.

  In the absorption tower 144 configured in this way, the gas (FA) and the liquid (FB) descending in the absorption tower 144 flow in the mixing element 146 in parallel, and the gas and the liquid are stirred and mixed. , Gas-liquid contact well. By applying this absorption tower 144 to gas absorption, gas cooling, dust removal operations, etc., it can be applied to the separation, purification, recovery, and detoxification of foreign substances in the gas.

When the mixing element according to the present invention is applied as a packing for an absorption tower, flooding does not occur, so the gas velocity in the absorption tower is in the range of 5 to 15 times that of the conventional packed tower system. Gas absorption treatment becomes possible, and the equipment cost is reduced. In addition, the gas-liquid contact efficiency is improved by improving the packing density, the tower height is reduced by 10 to 50%, the tower diameter is reduced by 1/3 to 1/2, and the operation is performed with a low pressure loss of 200 to 1000 Pa. Is possible. It allows operation at a low liquid-to-gas ratio (l / ^{m 3)} for example in a range from 2~8l / ^{m 3.} In addition, gas absorption can be performed with high efficiency even at a low gas flow rate in the column, for example, in the range of 1 to 6 m / s, thereby saving space and energy. Furthermore, since the operation range is wide with respect to fluctuations in the amount of gas to be processed and gas concentration, operation management is facilitated. Furthermore, the production capacity is easily improved by exchanging with the packing used in the prior art absorption tower. Replacement work with the prior art filler can also be easily performed through the manhole. Furthermore, compared to the absorption tower using a conventional static mixer, the opening of the mixing element, that is, the diameter of the inner tube can be minimized, the short circuit of the fluid is reduced, and the gas-liquid contact efficiency is reduced. More improved. In addition, it is easy to manufacture mixing elements with large diameters (diameters of 1 m or more), absorption towers with large diameters (diameters of 1 m or more) can be easily manufactured, and high-efficiency processing large air volumes (30000 m ³ / h or more). Absorption tower fabrication and processing costs are reduced.

  1 is a perspective view of a 90 ° clockwise rotating mixing element according to an embodiment of the present invention.   It is a bottom view of a mixing element similarly.   It is a partial expansion perspective view of a mixing element similarly.   It is a perspective view of the mixing element which consists of a right rotation type 1st blade body and a left rotation type 2nd blade body concerning an example of the present invention.   FIG. 3 is a perspective view of a 90 ° counterclockwise mixing element according to an embodiment of the present invention.   It is a perspective view of the mixing element which similarly consists of a left rotation type 1st blade and a right rotation type 2nd blade.   It is explanatory drawing which shows the cross section of the right rotation type mixing element which concerns on the Example of this invention.   1 is a perspective view of a 15 ° clockwise rotating mixing element according to an embodiment of the present invention.   It is a perspective view of the mixing element which arranged the mixing element which consists of 15 degrees right rotation type blades concerning the example of the present invention at four steps.   FIG. 5 is a perspective view of a mixing element in which three 30 ° right-turning mixing elements are arranged in the same manner.   FIG. 5 is a perspective view of a mixing element in which three 60 ° right-rotating mixing elements are arranged in the same manner.   It is a perspective view of a mixing element in which three 90 ° right-turning mixing elements are arranged in the same manner.   It is a schematic sectional side view of the static fluid mixer which uses the mixing element which concerns on the Example of this invention.   It is a schematic side fragmentary sectional view of a static fluid mixer.   It is a schematic side fragmentary sectional view of a static fluid mixer.   It is a schematic longitudinal cross-sectional perspective view of the static type fluid mixer which concerns on this invention.   It is a general | schematic fragmentary longitudinal cross-section which shows the application example at the time of applying the mixing element which concerns on this invention to a distillation tower type gas-liquid contact apparatus.   It is a general | schematic fragmentary longitudinal cross-section which shows the application example at the time of applying to an absorption tower system gas-liquid contact apparatus.

Explanation of symbols

1, 10, 20, 29, 38, 47, 54a, 54b, 54c, 54d, 63, 64, 64a, 64b, 64c, 73, 73a, 73b, 73c, 82, 82a, 82b, 82c, 93, 94, 103, 113, 122, 123, 141a, 141b, 141c, 141d, 146a, 146b, 146c, 146d: Mixing element 2, 11, 21, 30, 39, 48, 55, 65, 74, 83, 125, 134: Passage pipes 3, 12, 22, 49, 56, 66, 75, 84, 96, 104, 114, 126: Right rotation type first blade body 6, 16, 43, 51, 59, 69, 78, 87, 98 , 106, 129: right rotation type second blade bodies 31, 40, 135: left rotation type first blade bodies 25, 34, 116, 138: left rotation type second blade bodies 5, 14 24, 33, 42, 50, 58, 68, 77, 86, 97, 105, 115, 128, 137: First inner tube 8, 18, 27, 36, 45, 52, 61, 71, 80, 89 , 99, 107, 117, 131: second inner tube 4, 7, 13, 15, 17, 19, 23, 26, 32, 35, 41, 44, 57, 60, 67, 70, 76, 79, 85, 88, 127, 130, 132, 136: Holes 9, 28, 37, 46, 53, 62, 72, 81, 90, 100, 108, 118, 133: Openings 91, 101, 111, 121: Stationary Mold fluid mixers 92, 102, 112, 140, 145: casings 95, 110, 120, 124: spacers 109, 119: space 139: distillation tower 144: absorption towers 142, 147: supports 143, 14 : Manhole

Claims (4)

A cylindrical passage tube through which fluid flows;
A right-handed or left-handed spiral first blade body installed in the passage tube;
A first inner tube disposed in the axial center of the first blade body;
A right-handed or left-handed spiral second blade body installed in the first inner tube;
A second inner tube disposed in the axial center of the second blade body,
The first blade body and the second blade body are formed of a porous body,
The length in the longitudinal axis direction of the passage tube is formed to be equal to or slightly longer than the first blade body,
The length of the second blade body in the longitudinal axis direction is substantially equal to or shorter than the length of the first blade body in the longitudinal axis direction;
The mixing element according to claim 1, wherein the first inner tube and the second inner tube are formed of a porous body . A cylindrical passage tube through which a fluid flows, a right-handed or left-handed spiral first blade body provided in the passage tube, and a first disposed at the axial center of the first blade body An inner tube, a right-handed or left-handed spiral second blade provided in the first inner tube, and a second inner tube arranged in the axial center of the second blade The first blade body and the second blade body are formed of a porous body, and the length of the passage tube in the longitudinal axis direction is equal to or slightly longer than the first blade body, and the second blade The length of the body in the longitudinal axis direction is substantially equal to or shorter than the length of the first blade body in the longitudinal axis direction, and the first inner tube and the second inner tube are formed of a porous body. A static fluid mixer comprising at least one mixing element . 2. The gas-liquid contact device according to claim 1, wherein at least one of the mixing elements is disposed in a distillation column type gas-liquid contact device through which a fluid flows in a counterflow . 2. The gas-liquid contact device according to claim 1, wherein at least one of the mixing elements is disposed in an absorption tower type gas-liquid contact device in which fluid flows in parallel flow .

Images