CN217796126U

CN217796126U - Stirrer and polymerization reactor

Info

Publication number: CN217796126U
Application number: CN202221932435.6U
Authority: CN
Inventors: 余爱平; 孟启贵; 陈发挥; 张楠
Original assignee: Huafeng Group Shanghai Engineering Co ltd
Current assignee: Huafeng Group Shanghai Engineering Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-11-15
Anticipated expiration: 2032-07-26

Abstract

The utility model provides a stirrer and polymerization ware, including formally, the trans stirring structure, scrape material stirring structure, formally stir the structure including being the first helical blade that the heliciform extends, a plurality of first stirring vane's one end is fixed on first helical blade, the other end extends towards first helical blade's spiral center, the trans stirring structure is including the second helical blade that is the heliciform and extends, a plurality of second stirring vane's one end is fixed on second helical blade, the other end extends towards second helical blade's spiral center, scrape material stirring structure including being the heliciform and extending scrape material blade, formally, the trans stirring structure, it constitutes wholly to scrape material stirring structure and pass through the support fixed linking to each other. The utility model discloses simple structure, maintenance convenience can make the material flow along the direction of height circulation, improve the mixed uniformity of material, and can also effectively improve supporting reactor's the jade liquid film update rate, and then improve heat exchange efficiency.

Description

Stirrer and polymerization reactor

Technical Field

The utility model relates to a chemical industry field, in particular to agitator and polymerization ware.

Background

Nylon 66 salt is commonly known as hexamethylene adipamide salt, and has a molecular formula: c ₁₂ H ₂₆ O ₄ N ₂ . The nylon 66 salt is a white or yellowish gem-like monoclinic crystal with no odor, no corrosion and slight ammonia smell. Nylon 66 salt is relatively stable in dry or solution at room temperature. Polymerization occurs at temperatures above 200 ℃. In industrial production, firstly adipic acid and hexamethylenediamine are reacted in an equimolar ratio to prepare nylon 66 salt, and then the polycondensation reaction is carried out to obtain the nylon 66. In the reaction process, water is removed and simultaneously an amido bond is generated to form a linear macromolecule, the diffusion speed of water in the system determines the reaction speed, and the polycondensation process can be carried out continuously or intermittently.

The nylon polymerization reaction kettle in the prior art is generally a vertical cylindrical autoclave, and comprises a kettle body and a stirrer in the kettle body, wherein the temperature of materials is adjusted by inputting steam or cooling water into a jacket of the kettle body, and the materials are uniformly mixed by using the stirrer. However, when the temperature of the nylon material rises, the viscosity of the material also increases, and a part of the material can be adhered to the inner wall of the polymerization kettle to form wall scales, so that the heat transfer efficiency is reduced, the material is not sufficiently mixed, in addition, the matched stirrer only can enable the material to flow along the single direction, the three-dimensional stirring effect cannot be realized, and the stirring effect is poor.

Therefore, how to design an efficient stirrer, on the basis of ensuring the mixing consistency of high-viscosity fluid materials, the updating speed of a wall liquid film of a matched reactor is increased, and the quality of a polymer is further ensured, which is a problem to be solved urgently by technical personnel in the field.

Disclosure of Invention

One of the purposes of the utility model is to provide an agitator to prior art not enough, its simple structure, maintenance convenience can make the material flow along the direction of height circulation, improve the mixed uniformity of material, and can also effectively improve supporting reactor's the jade liquid membrane update rate, and then improve heat exchange efficiency.

The second purpose of the utility model is to provide a polymerization reactor, its simple structure, maintenance convenience to high viscosity material, make the material flow along high circulation, improve the mixing uniformity of high viscosity material, and polymerization reactor's the jade liquid film update rate is fast, improves polymerization reactor's heat exchange efficiency, effectively reduces the formation of gel under the high temperature in addition, can effectively guarantee the product quality of polymer.

The technical scheme of the utility model is that: the utility model provides a stirrer, includes formal stirring structure, trans stirring structure to and scrape material stirring structure, formal stirring structure is including being the first helical blade that the heliciform extends, and a plurality of first stirring vane's one end is fixed on first helical blade, along the even interval distribution of first helical blade's extending direction, and a plurality of first stirring vane's the other end extends towards first helical blade's spiral center, constitutes to be helical blade's frame construction, trans stirring structure is including being the second helical blade that the heliciform extends, and a plurality of second stirring vane, and second helical blade's spiral direction is opposite with first helical blade's spiral direction, and a plurality of second stirring vane's one end is fixed on second helical blade, along the even interval distribution of second helical blade's extending direction, and a plurality of second stirring vane's the other end extends towards second helical blade's spiral center, constitutes to be helical blade's frame construction, scrape material stirring structure including being the helical blade that extends, formal stirring structure, trans stirring structure, scrape the material stirring structure and pass through fixed linking to be constituted and the stirring bottom stirring structure is located the whole stirring.

Each first stirring blade and each second stirring blade are provided with a plurality of circular and/or elliptical flow guide holes.

The first helical blade extends upwards in a helical manner, the other end of the first stirring blade extends upwards in an inclined manner, and the inclination angle is 0-30 ℃.

The second helical blade extends downwards in a helical manner, the other end of the second stirring blade extends downwards in an inclined manner, and the inclination angle is 0-30 ℃.

The scraping blade extends downwards spirally.

The bottom of the scraping blade is provided with a stirring shaft.

Realize the utility model discloses the technical scheme of second purpose is: a polymerization reactor comprises a reaction vessel and any one of the stirrers, wherein the stirrer is arranged in the inner space of the reaction vessel and is driven to rotate by a driving shaft, a space is formed between a first helical blade of a formal stirring structure and the inner wall of the reaction vessel, a space is formed between a second helical blade of a reverse stirring structure and the inner wall of the reaction vessel, and a scraping blade of the scraping and stirring structure is in clearance fit with the inner wall of the reaction vessel.

The reaction vessel is formed by connecting an upper cylindrical section and a lower inverted conical section into a whole, and the scraping blade of the scraping and stirring structure is in an inverted conical structure with a small spiral diameter at the lower end and a large spiral diameter at the upper end and is in clearance fit with the lower inverted conical section of the reaction vessel.

The drive shaft is arranged at the bottom of the reaction vessel.

Adopt above-mentioned technical scheme to have following beneficial effect:

1. the stirrer comprises a formal stirring structure, a trans-stirring structure and a scraping stirring structure, wherein the formal stirring structure and the trans-stirring structure are used for driving surrounding materials to circularly flow along the height direction, the scraping stirring structure is used for scraping the materials adhered to the inner wall of the matched reactor, the updating speed of a liquid film on the inner wall of the matched reactor is improved, and the stirrer also has the function of assisting the surrounding materials to flow along the height direction. Formal stirring structure is including being the first helical blade that the heliciform extends, and a plurality of first stirring vane, the one end of a plurality of first stirring vane is fixed on first helical blade, along the even interval distribution of the extending direction of first helical blade, the other end of a plurality of first stirring vane extends towards first helical blade's spiral center, constitute and be helical blade form frame construction, the formal stirring structure of this kind of structure, through first helical blade, a plurality of first stirring vane combination, material around the formal stirring structure is adjusted well, especially high viscosity material forms the drive power towards the helical direction (upwards or downwards), make the material flow along the direction of height, and the space between a plurality of first stirring vane forms the supplementary entry of material (high viscosity material), improve formal stirring structure's stirring scope and stirring effect. The reverse stirring structure comprises a second spiral blade and a plurality of second stirring blades, wherein the spiral direction of the second spiral blade is opposite to the spiral direction of the first spiral blade, one ends of the second stirring blades are fixed on the second spiral blade and are uniformly distributed at intervals along the extending direction of the second spiral blade, and the other ends of the second stirring blades extend towards the spiral center of the second spiral blade to form a spiral blade-shaped frame structure. Scrape material stirring structure including being the heliciform extension scrape the material blade for with supporting reactor inner wall clearance fit, scrape the material of adhesion on the reactor inner wall and fall, not only improve heat exchange efficiency, still reduce the formation of gel on the reactor inner wall under the high temperature, guarantee the product quality of polymer. Formal stirring structure, anti-form stirring structure, scraping stirring structure pass through the support fixed connection and constitute wholly, and overall structure's agitator accessible drive rotates, simplifies the structure, and reduces the processing cost. Scrape material stirring structure and be located the bottom, usually, material adhesion inner wall formation wall dirt appears easily in the lower part inner wall of supporting reactor, scrapes material stirring structure to the particular position design, under the prerequisite of satisfying the scraping material, reduces the agitator and rotates the resistance, and guarantees that the material flows smoothly, reduces the agitator and rotates the resistance.

2. And a plurality of circular and/or oval diversion holes are formed in the first stirring blade and the second stirring blade, so that the supplement speed of high-viscosity materials is further increased, and the stirring efficiency of a formal stirring structure and a reverse stirring structure is improved.

The following further description is made with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a cross-sectional view of a polymerization reactor of the present invention.

In the drawing, 1 is a formal stirring structure, 11 is a first helical blade, 12 is a first stirring blade, 2 is a reverse stirring structure, 21 is a second helical blade, 22 is a second stirring blade, 3 is a scraping stirring structure, 31 is a scraping blade, 4 is a bracket, 5 is a reaction vessel, 51 is an upper cylindrical section, and 52 is a lower inverted conical section.

Detailed Description

Example 1

Referring to fig. 1, an embodiment of a blender is shown. The stirrer comprises a formal stirring structure 1, a trans-stirring structure 2 and a scraping stirring structure 3. The formal stirring structure 1 includes a first helical blade 11 extending in a spiral shape, and a plurality of first stirring blades 12, in this embodiment, the first helical blade extends upward along a clockwise spiral, one end of each of the first stirring blades 12 is fixed on the first helical blade 11, and is uniformly distributed at intervals along the extending direction of the first helical blade 11, and the other end of each of the first stirring blades 12 extends toward the spiral center of the first helical blade 11, so as to form a frame structure in a helical blade shape, and obviously, the other end of each of the first stirring blades extends upward in an inclined manner, and the inclined angle is controlled to be 0-30 ℃ as required, and in this embodiment, the inclined angle is 15 °. The reverse stirring structure 2 includes a second helical blade 21 extending in a spiral shape, and a plurality of second stirring blades 22, wherein the spiral direction of the second helical blade 21 is opposite to the spiral direction of the first helical blade 11, that is, the second helical blade extends downward along a clockwise spiral, one end of each second stirring blade 22 is fixed on the second helical blade 21 and evenly distributed at intervals along the extending direction of the second helical blade 21, and the other end of each second stirring blade 22 extends toward the spiral center of the second helical blade 21 to form a frame structure in a helical blade shape, and obviously, the other ends of the second stirring blades extend downward in an inclined manner, and the inclined angle is controlled to be 0-30 ℃ as required, and in this embodiment, the inclined angle is 15 °. Scrape material stirring structure 3 including being the scraping blade 31 of heliciform extension, in this embodiment, scrape material blade 31 and extend down along clockwise spiral, in order to satisfy the processing demand, is provided with the (mixing) shaft that extends along vertical direction in the bottom of scraping material blade 31. Formal stirring structure 1, trans-form stirring structure 2, scrape material stirring structure 3 pass through support 4 and fix the constitution whole that links to each other, and scrape material stirring structure 3 and be located the bottom.

Further, in order to meet the actual requirement, a plurality of circular and/or elliptical guide holes are disposed on each of the first stirring blade 12 and the second stirring blade 22.

Example 2

Referring to FIG. 1, a specific embodiment of a polymerization reactor is shown. The polymerization reactor comprises a reaction vessel 5 and the stirrer of the embodiment 1, in particular, the reaction vessel 5 is formed by connecting an upper cylindrical section 51 and a lower inverted conical section 52 into a whole, and other structures are in a conventional arrangement. The stirrer is arranged in the inner space of the reaction vessel 5, the first helical blade 11 of the formal stirring structure 1 and the inner wall of the upper cylindrical section of the reaction vessel 5 have a space, the second helical blade 21 of the trans-stirring structure 2 is an inverted cone-shaped structure with a small lower end helical diameter and a large upper end helical diameter, and is adapted to the shape of the lower inverted cone-shaped section 52 of the reaction vessel 5, and has a space with the lower inverted cone-shaped section of the reaction vessel 5, the scraping blade 31 of the scraping stirring structure 3 is in clearance fit with the inner wall of the reaction vessel 5, specifically, the scraping blade 31 is an inverted cone-shaped structure with a small lower end helical diameter and a large upper end helical diameter, and is in clearance fit with the lower inverted cone-shaped section 52 of the reaction vessel 5. The stirring shaft arranged at the bottom of the scraping blade is driven to rotate by the driving shaft to drive the whole stirrer to rotate.

Claims

1. An agitator, characterized in that: comprises a formal stirring structure (1), a reverse stirring structure (2) and a scraping and stirring structure (3),

the formal stirring structure (1) comprises a first helical blade (11) which extends in a helical shape and a plurality of first stirring blades (12), one ends of the first stirring blades (12) are fixed on the first helical blade (11) and are evenly distributed at intervals along the extending direction of the first helical blade (11), the other ends of the first stirring blades (12) extend towards the helical center of the first helical blade (11) to form a helical blade-shaped frame structure,

the reverse stirring structure (2) comprises a second helical blade (21) which extends in a helical shape and a plurality of second stirring blades (22), the helical direction of the second helical blade (21) is opposite to that of the first helical blade (11), one ends of the second stirring blades (22) are fixed on the second helical blade (21) and are evenly distributed at intervals along the extending direction of the second helical blade (21), the other ends of the second stirring blades (22) extend towards the helical center of the second helical blade (21) to form a helical blade-shaped frame structure,

the scraping and stirring structure (3) comprises a scraping blade (31) which extends in a spiral shape,

formal stirring structure (1), trans-form stirring structure (2), scrape material stirring structure (3) pass through support (4) and fixedly link to each other and constitute wholly, and scrape material stirring structure (3) and be located the bottom.

2. The blender as recited in claim 1, wherein: a plurality of circular and/or oval diversion holes are formed in the first stirring blade (12) and the second stirring blade (22).

3. The blender as recited in claim 1, wherein: the first helical blade (11) extends upwards in a helical manner, the other end of the first stirring blade (12) extends upwards in an inclined manner, and the inclined angle is 0-30 ℃.

4. The blender as recited in claim 1, wherein: the second helical blade (21) extends downwards in a helical mode, the other end of the second stirring blade (22) extends downwards in an inclined mode, and the inclined angle is 0-30 ℃.

5. The blender as recited in claim 1, wherein: the bottom of the scraping blade (31) is provided with a stirring shaft.

6. The blender as recited in claim 1, wherein: the scraper blade (31) extends spirally downwards.

7. A polymerization reactor characterized by: the stirrer comprises a reaction vessel (5) and the stirrer as claimed in any one of claims 1 to 6, wherein the stirrer is arranged in the inner space of the reaction vessel (5) and is driven to rotate by a driving shaft, a first helical blade (11) of the formal stirring structure (1) and the inner wall of the reaction vessel (5) are provided with a spacing space, a second helical blade (21) of the reverse stirring structure (2) and the inner wall of the reaction vessel (5) are provided with a spacing space, and a scraping blade (31) of the scraping stirring structure (3) is in clearance fit with the inner wall of the reaction vessel (5).

8. The polymerization reactor of claim 7, wherein: the reaction vessel (5) is formed by connecting an upper cylindrical section (51) and a lower inverted conical section (52) into a whole, and the scraping blade (31) of the scraping and stirring structure (3) is in an inverted conical structure with a small lower end spiral diameter and a large upper end spiral diameter and forms clearance fit with the lower inverted conical section (52) of the reaction vessel (5).

9. The polymerization reactor of claim 7, wherein: the drive shaft is arranged at the bottom of the reaction vessel (5).