WO2018223296A1 - Mélangeur à tuyaux - Google Patents

Mélangeur à tuyaux Download PDF

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Publication number
WO2018223296A1
WO2018223296A1 PCT/CN2017/087364 CN2017087364W WO2018223296A1 WO 2018223296 A1 WO2018223296 A1 WO 2018223296A1 CN 2017087364 W CN2017087364 W CN 2017087364W WO 2018223296 A1 WO2018223296 A1 WO 2018223296A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
heat exchange
inner sleeve
twisted
exchange medium
Prior art date
Application number
PCT/CN2017/087364
Other languages
English (en)
Chinese (zh)
Inventor
王昌松
刘耀倩
陈晶晶
陆小华
吴佳军
宋健
Original Assignee
南京工业大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京工业大学 filed Critical 南京工业大学
Priority to EP17912567.9A priority Critical patent/EP3587987B1/fr
Priority to PCT/CN2017/087364 priority patent/WO2018223296A1/fr
Priority to CN201780088617.5A priority patent/CN110431371B/zh
Publication of WO2018223296A1 publication Critical patent/WO2018223296A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4331—Mixers with bended, curved, coiled, wounded mixing tubes or comprising elements for bending the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4333—Mixers with scallop-shaped tubes or surfaces facing each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0052—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for mixers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/06—Heat exchange conduits having walls comprising obliquely extending corrugations, e.g. in the form of threads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the invention belongs to a fluid mixing device, in particular to a tubular mixer having a heat exchange function.
  • Mixing is a unit operation in which a mechanical or hydrodynamic method is used to disperse two or more materials to each other to achieve a certain degree of uniformity.
  • mechanical agitation, gas circulation agitation and hydraulic agitation are used to achieve mixing purposes.
  • engineering or engineering processes require heating or temperature control of the feedstock, discharge, and reaction processes; temperature affects both system energy consumption and is a key factor in ensuring normal and efficient reaction processes. Therefore, combining heat transfer technology with hybrid technology, the development of efficient and energy-saving mixers is of great significance for reducing production costs and saving energy.
  • the mixing equipment commonly used in the industry includes a stirred mixing tank, a static mixer and a circulating mixer.
  • the commonly used heat exchange equipments include tubular heat exchangers, plate heat exchangers and finned heat exchangers, but these devices.
  • process raw materials have high solid content, high apparent viscosity and complex rheology, such as fermentation raw materials (straw and poultry manure systems, etc.), which cause blockage and scaling of the equipment, which greatly reduces the process transfer efficiency.
  • the continuous and stable operation of the system is affected.
  • Chinese patent CN201510185307.8 invents a tubular mixer with a spiral passage, which is provided with a spiral groove on the outer wall of the inner tube, and the spiral groove is connected with the inner wall of the outer tube to form a spiral passage.
  • the mixer of this structure can be in a short axial direction. Provides a long mixing length within the distance to provide better mixing during the same mixing time.
  • the passage is a spiral passage
  • this configuration is only suitable for a low solid content system, and for a high solid content system, especially a fiber-containing straw, it is easily clogged in such a passage, thereby reducing the mixing effect, and the patent Only for intensive mixing, it is not possible to enhance heat transfer at the same time.
  • Chinese patent CN201510305639.5 invented a casing type heat exchanger suitable for high solid content sewage, which is suitable for high solid content sewage, and dirt impurities in sewage are not easily scaled or formed on the walls of the sewage passage. Clogged, The heat exchange efficiency and continuous stable operation of the heat exchanger are ensured, and the heat transfer efficiency of the tube and shell side of the heat exchanger is high, so that it has high heat transfer enhancement performance, but the twisted tube in the heat exchanger The cross-section is triangular. For high-solids and high-viscosity complex fluids containing fibers, this configuration has a dead angle and does not achieve the effect of intensive mixing.
  • the twisted tube heat exchanger with a twisted tube section is elliptical. Although it has certain advantages in enhancing heat transfer performance, it is limited to single-phase fluids without solid particles, such as sulfuric acid cooling, ammonia preheating, and lubricating oil. Cool down and so on.
  • the object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a tubular mixer for high solid content, high viscosity or fiber-containing complex fluid, which simultaneously achieves enhanced mass transfer and heat transfer, and has anti-fouling , anti-blocking and replace the role of mechanical agitation.
  • the invention has important application background in the fields of petrochemical industry, food processing, biological fermentation and the like.
  • a tubular mixer comprising a mixing inner sleeve and a heat exchange outer sleeve, the inner sleeve being located in an outer sleeve, the inner sleeve having a hexagonal cross section and being along the tube
  • the center clockwise twisted inner tube is combined with the counterclockwise twisted inner tube.
  • the tubular mixer is suitable for a high solid content, high viscosity material system, and has the advantages of simple structure, anti-blocking and anti-fouling, heat exchange and mixing.
  • the inner sleeve has an equilateral hexagonal cross section.
  • the central axis of the inner casing is a straight line or a curve, and a linear central axis is used under preferred conditions.
  • the inner sleeve is formed by an inner tube which is uniformly twisted clockwise along the center of the tube and an inner tube which is uniformly twisted counterclockwise.
  • the inner sleeve torque that is, the inner wall of the tube is helically deformed by 360° around the central axis of the tube.
  • the tube length is 300-800 mm, preferably 500-800 mm.
  • the inscribed circle diameter of the hexagonal section of the inner sleeve is 20-150 mm, preferably 80-150 mm. It is found that the diameter of the inscribed circle is too large or too small, which affects the heat exchange efficiency and the mixing effect, and is easy. Causes dirt or blockage on the inner casing wall.
  • the cross-sectional shape of the outer sleeve of the present invention is not limited and may be circular, square, hexagonal, etc., in order to facilitate production and better heat exchange efficiency, it is preferred that the outer sleeve has a circular interface shape.
  • the inscribed circle diameter of the inner sleeve and the inner cut of the outer sleeve The diameter of the circle is 5-15mm, preferably 10-15mm. It is found that the excessive or too small spacing will reduce the heat transfer effect, especially if the spacing is too large, it will result in higher energy consumption and cost.
  • the inscribed circle diameter of the inner sleeve and the outer sleeve of the present invention can be adjusted within the scope of the present invention according to actual needs, in order to achieve better anti-fouling and anti-clogging effect, higher mixing effect and better.
  • the inner sleeve of the present invention may comprise one or more such constituent units;
  • the tubular mixer of the present invention comprises a material mixing passage and a heat exchange medium passage, wherein the material mixing passage is composed of an inner casing, and two ends of the material mixing passage are respectively provided with a material feeding port and a material. a discharge port; the heat exchange medium passage is formed by an annular gap between the outer sleeve and the inner sleeve, and both ends of the heat exchange medium passage formed by the gap between the outer sleeve and the inner sleeve can be closed, An inlet pipe of the heat exchange medium and an outlet pipe of the heat exchange medium are disposed on the heat medium passage or the total passage of the heat exchange medium.
  • the material feed port corresponds to the outlet pipe of the heat exchange medium
  • the material discharge port corresponds to the inlet pipe of the heat exchange medium.
  • the dead zone of the mixer is relatively small, which can significantly enhance the mixing effect.
  • the mixing channel is formed by the coaxial tube and the twisted tube which are nested with each other, and can be conveniently manufactured by using conventional machining technology, and the cost is low.
  • the material can be fully mixed and exchanged in the mixing channel to improve the efficiency of the later system reaction and reduce energy consumption.
  • Figure 1 is a general view of a mixer having a heat exchange function
  • FIG. 3 is a schematic diagram of the mixer section
  • the invention relates to a tubular mixer with high solid content, high viscosity or fiber-containing complex fluid, and at the same time realizes enhanced mass transfer and heat transfer, including an inner sleeve and an outer sleeve, the inner sleeve is located in the outer sleeve, and the inner sleeve is The cross section is hexagonal and is composed of an inner tube that is twisted clockwise along the center of the tube and an inner tube that is twisted counterclockwise.
  • the tubular mixer is suitable for a high solid content, high viscosity material system, and has the advantages of simple structure, anti-blocking and anti-fouling, heat exchange and mixing.
  • the inner sleeve of the present invention may be a hexagonal twisted tube which is hexagonal in cross section and which is composed of an inner tube which is uniformly twisted clockwise along the center of the tube and an inner tube which is uniformly twisted counterclockwise.
  • the cross-section of the hexagonal twisted tube is a regular hexagon, the central axis of which is a straight line or a curve, and a linear central axis as shown in FIG. 2 is used under preferred conditions.
  • the torque that is, the length of the tube corresponding to the distortion of the tube wall around the central axis of the tube by 360°
  • the torque of the hexagonal twisted tube is 300-800 mm.
  • the inscribed circle diameter of the hexagonal section of the hexagonal twisted tube is 20-150 mm, as shown in FIG.
  • the material and the heat exchange medium directly exchange heat through the tube wall of the hexagonal twisted tube.
  • a common circular casing can be used, the outer casing has a circular cross section, and the pipe diameter is larger than the inner casing, and the outer casing wall and the inner casing are spaced 5-15 mm apart.
  • the cross-sectional structure of the inner and outer casings in this example is shown in Fig. 3.
  • Figure 1 shows a relatively complete tubular mixer consisting of outer casing 1, inner casing 2, material A inlet 3, material B inlet 4, material outlet 5, heat exchange medium inlet 6, heat exchange medium outlet 7
  • the outer sleeve is a heat exchange medium passage
  • the inner sleeve is a material mixing passage
  • the inner sleeve is located in the outer sleeve, wherein the inner sleeve has a hexagonal cross section and is uniformly twisted clockwise along the center of the tube.
  • the tube is combined with a counter-clockwise uniformly twisted inner tube.
  • the inner tube ends are respectively connected with a feed nozzle A and a feed nozzle B and a material outlet 5.
  • the heat exchange medium flows from the heat exchange medium inlet 6 into the annular gap of the circular section casing and the hexagonal section twisted tube, and flows out from the heat exchange medium outlet 7, and the outer sleeve is provided with the heat insulating material.
  • the outer casing is a circular casing
  • the material A is straw
  • the material B is a CMC (Carboxy Methylated Cellulose) solution (mass fraction is 1%)
  • the heat exchange medium is water.
  • the material inlet temperature is 10 ° C
  • the heat exchange medium inlet temperature is 55 ° C.
  • the tracer method was used to characterize the mixing effect. 0.7 mol/L KCl solution was injected into the inlet, and the voltage was measured at the outlet with a conductivity meter (DDSJ-308A). The dimensionless variance of the residence time was calculated by the voltage.
  • the inlet speeds of the materials in the examples and the comparative examples in Table 1 are the same, the inlet speeds of the heat exchange medium are also the same, D 1 is the diameter of the hexagonal inscribed circle, D 2 is the diameter of the outer tube, and n 1 and n 2 are respectively two twists.
  • the torque of the tubes, L 1 and L 2 are the lengths of the two twisted tubes, respectively (see Figure 2).
  • Example 4 and Example 5 respectively changed the torque and length of the two-stage twisted tube
  • Example 7 changed the structural dimensions of the inner tube and the outer tube. According to the characterization results, the mixing and heat exchange effects were compared with the example 1 Similar, so in the actual operation, the above various combinations can be flexibly selected according to the specific situation.
  • Example 6 and Comparative Example 5 it can be seen from Example 6 and Comparative Example 5 that for a high solid content, high viscosity fiber-containing material, the diameter of the hexagonal inscribed circle is too small to cause clogging; from Example 1 and Comparative Example 6-7, the same inner tube is known. In the case of reducing or enlarging the annular gap between the inner tube and the outer tube, the mixing effect is not greatly affected, but the small gap will cause the temperature difference to be insufficient, which is insufficient to heat the material in the inner tube, thereby reducing the heat exchange effect.
  • the hexagonal inscribed circle has an excessively large diameter, which causes slight scaling, destroys the swirling flow pattern, and increases the heat transfer resistance, thereby reducing the mixing effect and heat transfer performance.
  • D 1 20 ⁇ 80mm of the inner tube
  • D of the outer tube 2 30 ⁇ 95mm preferred, for 10-15% TS of the material selection
  • tubular mixer having a heat exchange function according to the present invention can be converted into a plurality of specific structural forms according to its structural features, such as in an outer casing.
  • the inner sleeve of the present invention may further comprise one or more constituent units; neither of the above various transformations and combinations thereof constitute a tubular mixer It is out of the scope of protection of the present invention.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geometry (AREA)
  • Dispersion Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un mélangeur à tuyaux comprenant un tuyau manchon interne (2) apportant une action de mélange et un tuyau manchon externe (1) apportant une action d'échange de chaleur, le tuyau manchon interne (2) étant situé à l'intérieur du tuyau manchon externe (1), la section transversale du tuyau manchon interne (2) étant hexagonale et formée d'une combinaison d'une section de tuyau interne tournant dans le sens des aiguilles d'une montre le long du centre de tuyau et d'une section de tuyau interne tournant dans le sens inverse des aiguilles d'une montre. Le mélangeur à tuyaux est destiné à un fluide complexe à haut contenu de solides, à haute viscosité ou contenant des fibres et permet également un transfert de masse et un transfert de chaleur améliorés. Ladite invention présente en outre des fonctions anti-salissure, antiblocage et d'agitation mécanique en alternance.
PCT/CN2017/087364 2017-06-07 2017-06-07 Mélangeur à tuyaux WO2018223296A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17912567.9A EP3587987B1 (fr) 2017-06-07 2017-06-07 Mélangeur à tuyaux
PCT/CN2017/087364 WO2018223296A1 (fr) 2017-06-07 2017-06-07 Mélangeur à tuyaux
CN201780088617.5A CN110431371B (zh) 2017-06-07 2017-06-07 一种管式混合器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/087364 WO2018223296A1 (fr) 2017-06-07 2017-06-07 Mélangeur à tuyaux

Publications (1)

Publication Number Publication Date
WO2018223296A1 true WO2018223296A1 (fr) 2018-12-13

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PCT/CN2017/087364 WO2018223296A1 (fr) 2017-06-07 2017-06-07 Mélangeur à tuyaux

Country Status (3)

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EP (1) EP3587987B1 (fr)
CN (1) CN110431371B (fr)
WO (1) WO2018223296A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN111960971B (zh) * 2020-09-19 2023-04-11 寿光市荣晟新材料有限公司 一种2-丙烯酰胺基-2-甲基丙磺酸的生产工艺及生产设备

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Title
See also references of EP3587987A4

Also Published As

Publication number Publication date
EP3587987A4 (fr) 2020-11-04
CN110431371B (zh) 2024-05-07
EP3587987A1 (fr) 2020-01-01
EP3587987B1 (fr) 2023-02-15
CN110431371A (zh) 2019-11-08

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