CN114311390B - High-viscosity liquid phase granulation equipment - Google Patents

High-viscosity liquid phase granulation equipment Download PDF

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Publication number
CN114311390B
CN114311390B CN202210261200.7A CN202210261200A CN114311390B CN 114311390 B CN114311390 B CN 114311390B CN 202210261200 A CN202210261200 A CN 202210261200A CN 114311390 B CN114311390 B CN 114311390B
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liquid
drip
tray
rotating shaft
dropping
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CN114311390A (en
Inventor
张剑敏
张立明
王庆伟
刘超
尚良柱
陈凯迪
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Dongying Special Equipment Inspection And Research Institute
Shandong Haike Innovation Research Institute Co Ltd
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Dongying Special Equipment Inspection And Research Institute
Shandong Haike Innovation Research Institute Co Ltd
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Abstract

The invention provides high-viscosity liquid phase granulation equipment which comprises a precipitation groove, a dispersion cylinder, a dripping disc and a dripping pipe, wherein the dripping disc is provided with a disc surface and a rotating shaft, the rotating shaft is positioned at the central position of the disc surface and is vertical to the disc surface, the disc surface can freely rotate around the central axis of the rotating shaft, the rotating shaft is obliquely arranged, the dripping pipe drips polymerization liquid to the disc surface, and the polymerization liquid is scattered into precipitation liquid through the disc surface. The dropping liquid dish in this application is under the eccentric action of the high viscous reaction liquid in the dropping liquid pipe, make high viscosity reaction liquid rotate along with the dropping liquid dish, the dropping liquid dish can play the dispersion to high viscous reaction liquid on the one hand, avoid the reaction liquid to gather and separate out continuous or large granule solid, on the other hand high viscous reaction liquid is under the centrifugal action and the gravity dual function of dropping liquid dish, effectively overcome the viscous effect of reaction liquid and dropping liquid dish, similar water droplet is even, quick entering is to in the precipitation liquid, thereby form the solid of even granularity, the big uncovered type design of the groove adoption of separating out simultaneously can effectively prevent to block up the emergence.

Description

High-viscosity liquid phase granulation equipment
Technical Field
The invention belongs to the field of resin processing, relates to a mechanical granulation device for resin, and particularly relates to a high-viscosity liquid phase granulation device.
Background
High heat-resistant resins, such as polysulfone resins, polyphenylene sulfide resins, polyether ether ketone resins, poly (arylene ether nitrile) resins and the like, have excellent heat resistance, good mechanical properties, dielectric properties, corrosion resistance and the like; and can obtain molded products, fibers, films or foam materials and the like through extrusion, injection molding and other modes, has good processing performance, and is widely applied to the fields of aerospace, medical treatment, electronics and electrics, chemical industry and the like.
The above resins are usually prepared by first forming a reaction solution by a polycondensation reaction of the raw materials, the polycondensation polymerization reaction usually requires a high boiling point solvent as a reaction medium, forming a high viscosity reaction solution, and the reaction solution also generates an alkali metal halide salt by-product, and then conveying the reaction solution to a downstream unit for granulation.
When such a high-viscosity reaction liquid is granulated, a solid is usually precipitated from the reaction liquid, and then the resultant is granulated by a granulator. In the working process, because the solid particles have certain viscosity, the blockage phenomenon of the granulator often occurs, the granulation effect is poor, and the normal production is influenced.
Therefore, how to design a resin granulation device with uniform particle size and high efficiency, especially a granulation device in the production process of the high heat-resistant resin, becomes one of the problems to be solved in the production process of the resin.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a resin granulation apparatus with uniform particle size and high efficiency, especially a granulation apparatus in the production process of the above high heat-resistant resin.
The invention provides a high-viscosity liquid phase granulation device, which comprises a feeding pipeline for conveying polymerization liquid, and also comprises:
a precipitation tank which is filled with precipitation liquid;
a dispersion barrel having a barrel cavity with an opening facing the effluent;
the drip tray is arranged in the barrel cavity and is provided with a tray surface and a rotating shaft, the rotating shaft is positioned at the central position of the tray surface and is vertical to the tray surface, the tray surface can freely rotate around the central axis of the rotating shaft, the rotating shaft is obliquely arranged,
and the liquid dropping pipe is used for dropping the polymerization liquid to the disc surface, and the polymerization liquid is scattered into the precipitation liquid through the disc surface.
Preferably, the tray surface forms an included angle α with a horizontal plane, and the viscosity of the polymerization solution is μ, wherein:
α=0.002075μ 2 -0.055 μ +13.125, 1. Mu. Or less and 200. Mu. Units mPas.
Preferably, the included angle alpha formed between the disc surface and the horizontal plane is more than or equal to 3 degrees and less than or equal to 80 degrees.
Preferably, the outer edge of the disk surface is uniformly provided with a plurality of tooth-shaped unit structures.
Preferably, the plane of the tail part of the dropping liquid pipe is parallel to the disc surface.
Preferably, the liquid dropping pipe is provided with a liquid dropping port, and the liquid dropping port is eccentrically arranged relative to the disc surface;
the projection of the drip openings on the disk surface is positioned on the upper half part of the disk surface and is positioned in the middle of the rotating shaft and the outer edge of the disk surface.
Preferably, the number of the drip trays is multiple, the number of the drip tubes is multiple, and the plurality of drip trays and the plurality of drip tubes are in one-to-one correspondence.
Preferably, the drip tray is fixed to the inner wall of the dispersion drum via a bracket.
Preferably, the top of the dispersing cylinder is hermetically arranged, and the dropping liquid pipe penetrates through the dispersing cylinder and penetrates into the cylinder cavity.
Preferably, the disc surface forms an angle α of 35 ° with the horizontal plane.
Compared with the prior art, the slope sets up and can free rotation's dropping liquid dish under the eccentric action of the high viscous reaction liquid in the dropping liquid pipe in this application, make high viscosity reaction liquid rotate along with the dropping liquid dish, the dropping liquid dish can play the dispersion to high viscous reaction liquid on the one hand, avoid reaction liquid to gather and separate out continuous or large granule solid, on the other hand high viscous reaction liquid is under the centrifugal action and the gravity dual function of dropping liquid dish, effectively overcome the viscous action of reaction liquid with the dropping liquid dish, similar water droplet is even, quick entering to in the precipitation liquid, thereby form the solid of even granularity, the big uncovered type design of the groove adoption of simultaneously precipitating can effectively prevent to block up the emergence.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic view of a high viscosity liquid phase granulation apparatus according to the present invention;
fig. 2 is a schematic view of a drip tray of the high viscosity liquid phase granulation apparatus of fig. 1.
In the figure:
1. a groove is separated; 2. precipitating liquid; 3. a dispersing cylinder; 4. a barrel cavity; 5. an opening; 6. a drip tray; 61. a dish surface; 62. a rotating shaft; 7. a dropping tube; 8. and (3) a bracket.
Detailed Description
For a further understanding of the invention, preferred embodiments of the invention are described below with reference to the drawings, but it should be understood that the description is intended to further illustrate the features and advantages of the invention and not to limit the claims of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, the present invention provides a high viscosity liquid phase granulation apparatus, comprising a feeding pipe for conveying a polymerization liquid, further comprising:
a precipitation tank 1 which is filled with a precipitation liquid 2, and after entering the precipitation liquid, high-viscosity reaction liquid formed by polycondensation of raw materials can precipitate solids in the precipitation liquid;
a dispersion drum 3 having a drum chamber 4, the drum chamber 4 having an opening 5 facing the eluate 2;
the drip tray 6 is arranged in the barrel cavity 4, the drip tray 6 is provided with a tray surface 61 and a rotating shaft 62, the rotating shaft 62 is positioned at the central position of the tray surface 61 and is vertical to the tray surface 61, the tray surface 61 can freely rotate around the central axis of the rotating shaft 62, the rotating shaft 62 is obliquely arranged, the drip pipe 7 is provided with a drip opening, and the drip opening is eccentrically arranged relative to the tray surface 61;
and a dropping pipe 7 for dropping the polymerization liquid toward the tray surface 61, wherein the polymerization liquid is scattered to the precipitation liquid 2 through the tray surface.
Specifically, in the above structure, the dispersing cylinder 3 is a cylinder without a top and a bottom, the rotatable dropping tray (disk) 6 is fixed in the cylinder cavity 4 and is obliquely arranged in the center, the inclined angle between the dropping tray 6 and the horizontal plane is a, the dropping tray 6 is provided with a rotating shaft 62 with a vertical disk surface at the center of the circular disk 61, the upper end and the lower end of the rotating shaft 62 of the disk 61 are connected with the support 8 through bearings, and the support 8 is fixedly connected to the inner wall of the cylinder. An eduction tank 1 is arranged under the dispersion cylinder 3, the eduction tank 1 is provided with an eduction liquid inlet 9 and a product outlet 10, the upper part of the cylinder body is provided with a high-viscosity reaction liquid injection port, a dropping liquid pipe 7 is used for conveying the high-viscosity reaction liquid to extend into and extend to the upper part of the disc and is provided with a downward inclined dropping nozzle, the inclined direction is consistent with the inclined direction of the disc, and the dropping nozzle is positioned at the eccentric position of the disc.
During operation, high-viscosity reaction liquid formed by polycondensation is dripped out through a dripping pipe and falls onto a plate surface 61 of the dripping tray 6 under the action of gravity, and flows obliquely downwards along the surface of the plate surface 61, finally the high-viscosity reaction liquid drips along the outer edge of the plate surface 61 and enters a precipitation liquid in the precipitation tank 1 to precipitate solid, meanwhile, the dripping port is eccentrically arranged relative to the plate surface 61, after the liquid drips, the dripping tray 6 is unevenly stressed and loses balance, one side of the plate surface 61 on which the liquid drips moves downwards due to the increase of gravity so as to drive the dripping tray 6 to rotate (buffer the pressure of the dripping port), the dripping tray 6 stably rotates in the continuous blanking process of the dripping pipe 7, finally the reaction liquid is thrown and falls into the precipitation liquid in the precipitation tank 1 along the edge of the plate surface 61 under the driving of the rotation of the dripping tray 6 to form solid particles with uniform particle sizes, the solid particles are discharged from a product outlet 10 and enter a post-treatment unit, and the precipitation liquid inlet 9 continuously replenishes and precipitates to keep the stable precipitation liquid level.
The setting of slope in this application and can free rotation's dropping liquid dish 6 under the eccentric action of dropping liquid pipe 7 high viscosity reaction liquid, make high viscosity reaction liquid rotate along with dropping liquid dish 6, dropping liquid dish 6 can play the dispersion effect to high viscosity reaction liquid on the one hand, avoid the reaction liquid to gather and separate out continuous or large granule solid, on the other hand high viscosity reaction liquid is under the centrifugation and the gravity dual function of dropping liquid dish, effectively overcome the viscous effect of reaction liquid and dropping liquid dish, similar water droplet is even, quick entering is to separating out in the liquid, thereby form the solid of even granularity, the big uncovered type design of simultaneously separating out 1 adoption of groove can effectively prevent to block up the emergence.
For the angle alpha between the inclined drip tray 6 and the horizontal plane, the practice shows that the angle alpha formed by the tray surface 61 and the horizontal plane has a certain relationship with the viscosity mu of the polymerization solution (mu unit is mPa · s), and the adjustment and verification result is that: α =0.002075 μ 2 -0.055μ+13.125,1≤μ≤200。
Specifically, when the viscosity of the reaction solution was 100 mPas, the angle α between the drip tray and the horizontal plane was adjusted to about 28.5 °; when the viscosity of the reaction solution is 50mPa s, the included angle alpha between the dripping disc and the horizontal plane is adjusted to be about 15.5 degrees;
preferably, in the structure, the included angle alpha formed by the disk surface 61 and the horizontal plane is controlled to be between 3 degrees and 80 degrees.
In a preferred embodiment, as shown in fig. 2, a plurality of tooth-shaped unit structures are uniformly arranged on the outer edge of the disk surface 61. The tooth-shaped structure can play a guiding role in the reaction liquid, so that the reaction liquid is fully dispersed, the reaction liquid is dripped into the precipitation liquid from different teeth, and the uniformity of solid particles is improved. The plane of the tail of the drip tube 7 is parallel to the disc surface 61. The liquid dropping pipe 7 is provided with a liquid dropping port which is eccentrically arranged relative to the disc surface 61; the projection of the drip openings on the disc surface 61 is positioned on the upper half part of the disc surface 61 and is positioned in the middle of the outer edges of the rotating shaft 62 and the disc surface 61.
Preferably, the number of the drip trays 6 is multiple, the number of the drip tubes 7 is multiple, and the plurality of drip trays 6 correspond to the plurality of drip tubes 7 one by one. And a plurality of groups of drip trays and drip pipes are arranged in the dispersion cylinder, so that the working efficiency of the equipment is effectively improved. The top of the dispersion cylinder 3 is hermetically arranged, and the dropping liquid pipe 7 penetrates through the dispersion cylinder 3 and goes deep into the cylinder cavity 4. The sealing structure can play the heat preservation effect to the system on the one hand, avoids thermal scattering and disappearing to cause the influence to the reaction liquid, and on the other hand can prevent that impurity outside from getting into in the system, influencing the normal use of equipment.
In a specific embodiment, the high viscosity reaction solution in the present application is 117 mPas, and the angle α formed by the plate surface 61 and the horizontal plane is 35 °
The above detailed description of a high viscosity liquid granulation apparatus provided by the present invention, and the principles and embodiments of the present invention described herein using specific examples, is provided only to help understand the method of the present invention and its core ideas, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any combination of methods. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The scope of the invention is defined by the claims and may include other embodiments that occur to those skilled in the art. Such other embodiments are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.

Claims (8)

1. A high viscosity liquid phase granulation apparatus, comprising:
a precipitation tank which is filled with precipitation liquid;
a dispersion barrel having a barrel cavity with an opening facing the effluent;
the drip tray is arranged in the barrel cavity and is provided with a tray surface and a rotating shaft, the rotating shaft is positioned in the center of the tray surface and is vertical to the tray surface, the tray surface can freely rotate around the central axis of the rotating shaft, and the rotating shaft is obliquely arranged;
a dropping pipe which drops the polymerization liquid to the tray surface, and the polymerization liquid is scattered to the precipitation liquid through the tray surface;
the plane where the tail of the liquid dropping pipe is located is parallel to the disc surface;
the liquid dropping pipe is provided with a liquid dropping opening which is eccentrically arranged relative to the disc surface;
the projection of the drip port on the disk surface is positioned at the upper half part of the disk surface and is positioned in the middle of the rotating shaft and the outer edge of the disk surface;
when the polymerization liquid is dripped to the drip tray through the drip pipe, the drip tray is integrally stressed unevenly to drive the drip tray to rotate due to the increase of gravity, and in the continuous blanking process of the drip pipe, the drip tray continuously rotates to throw the polymerization liquid along the edge of the tray surface into the precipitation tank.
2. The apparatus for granulating a liquid phase with a high viscosity according to claim 1, wherein the plate surface forms an angle α with a horizontal plane, the viscosity of the polymerization liquid is μ in units of mPa-s,
α=0.002075μ 2 -0.055 μ +13.125, wherein: mu is more than or equal to 1 and less than or equal to 200.
3. A high viscosity liquid phase granulation apparatus as defined in claim 2, wherein said plate surface forms an angle α with the horizontal plane, α being 3 ° or more and 80 ° or less.
4. A high viscosity liquid phase granulation apparatus as defined in claim 1, wherein said disk surface has a plurality of tooth unit structures uniformly arranged on its outer periphery.
5. The apparatus according to claim 1, wherein the number of the drip trays is plural, the number of the drip pipes is plural, and the plurality of the drip trays correspond to the plurality of the drip pipes one by one.
6. The apparatus according to claim 1, wherein the drip tray is fixed to the inner wall of the dispersion drum via a bracket.
7. A granulation apparatus as defined in claim 1, wherein said dispersion drum is hermetically sealed at the top thereof, and said dropping pipe penetrates said dispersion drum and enters said drum cavity.
8. A high viscosity liquid phase granulation apparatus as claimed in claim 3, wherein said disc surface forms an angle α of 35 ° with the horizontal plane.
CN202210261200.7A 2022-03-17 2022-03-17 High-viscosity liquid phase granulation equipment Active CN114311390B (en)

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